US2041578A - Drill press head - Google Patents

Description

May 19, 1936. H, E, TAUT-z 2,041,578

DRILL PRESS HEAD Filed Dec. s, 1935 6 Sheets-Sheet 1 67 ATTORNEY May 19, 1936.

H. E. TAUTZ DRILL PRESS HE Filed Dec. 8, 1955 6 Sheets-Sheet 2 INVENTOR HERBERT E. TAUTZ TTORN A r DRILL PRESS HEAD Filed Dec. 8, 1955 6 SheetsSheet'3 INVENTO Q HERBERT ETAU BYCM O\ MW,

ATTORNEY May 19, 1936. H. E. TAUTZ 2,041,578

' DRILL PRESS HEAD Fiied Dec. 8, 1955 6 Sheets-Sheet 4 69 INVENTOR 5 HERBERT TAUTZ I ma,

A TTORNE Y E. TAUTZ 2,041,578

DRILL PRESS HEAD Filed Dec. 8, 1953 e Sheets-Sheet 5 f I l 1.1. 31. 1 III.

I I I Q l, Q iNVENTOR.

F HERBERT E. TAUTZ 3 I BY Cmml ' ATTORNEY May 19, 1936. H E TAUTZ 2,041,578

DRILL PRESS HEAD Filed Dec. 8, 1933 6 Sheets-Sheet 6 I 18INVEITOR w k WW A TTORNEY Patented May 19, 1936 PATENT OFFICE DRILL PRESS HEAD Herbert E. Tautz, Milwaukee, Wis., assixnor to Delta Manufacturin 'Wis.

g Company, Milwaukee,

Application December s, 1933, Serial No. 101,515

Claims.

. The invention relates to a head for use on a drill press or similar tool having a rotary-spindle.

Specifically, it relates to a head having therein a. bearing for supporting a spindle and means 5 cooperating with said head for supporting a motor for driving said spindle, both the spindle and the motor shaft each preferably being provided either with several separate pulleys or with cone pulleys.

More specifically, the invention relates to means for shifting the motor with respect to the. head, whereby the motor. may be moved toward and from the spindle, mounted in the'head, and may also be raised and lowered bodily 'tovary the alinement of the respective pulleys, so that any pulley or any step of a cone pulleyon either the motor shaft or the drill spindle may be correctly and quickly alined with any desired pulley or step on the other shaft and further means whereby the spacing of the said two shafts may quickly be altered to correspond with the length of the belt being used.

Still more specifically, the invention relates to means permitting rapid adjustment of the motor toward and from the drill spindle and further means having definite stop positions for quickly shifting the motor in a direction parallel to the axis of the drill spindle in definite steps and automatically locking the same when such shiftin has been accomplished. 4

By the combination of these two adjustments it is obvious that'the selected motor pulley or cone step may be quickly alined with the selected pulley or step on the drill spindle and locked in such position of alinement and thereupon the motor may be shifted bodily to properly tighten the belt and also looked in such position, thus easily, speedily and automatically accomplishing an operation which would otherwise require considerable time and effort, if performed manually and without mechanical assistance.

Other objects and advantages of the invention will in part be specifically pointed out in the following specification and drawings and will in part be obvious from the structure disclosed.

For a clearer understanding of the invention, attention is directed to the following specification in connection with the accompanying drawings wherein:

Fig. 1 is a side elevation of a drill press head combined with a motor, and embodying the invention.

Fig. 2 is a plan view of the structure disclosed in Fig. 1.

' Fig. 3 is a sectional view on the plane indicated by the line 3-3 of Fig. 1, looking in the direction of the arrows and showing certain details of the motor mounting. Y

Fig. 4 is an elevation of thebase upon which 5 the motor is mounted, .as seen from the side opposite to that disclosed in Fig. 3.

Fig. -5 is ahorizontal section of the structure illustrated in Fig. 4, said section being made on the planes indicated by the broken line '5-'-5 of Fig. 4 a

Fig. 6 is an elevation of a modified motor mounting base which may be substituted for that illustrated in detail in Figs. 3,4 and 5, certain parts being shown in section. i

Fig. '7 is a horizontal section of the structure illustrated in Fig. 6, said section being made on the planes indicated by the broken line 'l--| of Fig. 6. a

Fig. 8 is a fragmentary elevation showing a modified form of operating mechanism which may be employed-in place of that provided in Figs. 6 and 7.

Fig. 9 is an elevation of a still further modified motor mounting base which may be substituted for that illustrated in detail in Figs. 3, 4 and 5.

Fig. 10 is an elevation of another modfied motor mounting base which may be substituted for that illustrated in detail in Figs. 3, 4, and 5.

Fig. 11 is a detail cross section on the plane indicated by the line lli| of Fig. 10 showing the locking pin structure employed in said figure.

Fig. 12 is a fragmentary diagrammatic elevation of another modification of motor mounting base wherein a screw is used, instead of the gears .or levers employed in the preceding forms, for shifting the motor vertically through a predetermined distance.

Fig. 13 is a corresponding fragmentary diagrammatic elevation of a still further modification also using a screw for shifting the motor.

Fig. 14 is a fragmentary elevation of the structure illustrated in Fig. 13, as seen from the right, showing certain details of the motor mounting base on a larger scale and certain rods in cross section, and

Fig. 15 is a sectional detail view of a portion of the structure illustrated in Fig. 14, on the plane indicated by the line l5-l5.

In the various figures similar parts are designated by the same reference characters.

Referring first to Figs. 1 and2, there is illustrated a support I, here shown as tubular, which may be mounted in any suitable way and which serves to slidably support the drill head 2. The

drill head is preferably bored as shown at 3 to fit slidably upon the member and a slot or the like 4 is provided leading into the bore 3 to furnish a certain amount of resilience or give to the said bore 3, whereby it becomes possible to secure the drill head 2 firmly to the support I at any desired position of adjustment, by suitably tightening the bolt 5, which passes through the drill head adjacent the bore 3 and has a nut 6 at its other end, suitable washers 1 being interposed, if desired.

The head 2 is provided also with an enlarged portion 8 which is suitably bored to receive the quill 9 through which passes the drill spindle The head is also preferably provided with a flared or bell-shaped portion l6, serving to guard and conceal the pulleys i2 and I3 which are suitably keyed to the spindle l by means of the keyways i4 in said spindle, cooperating with keys I5 moving with the pulleys as best shown in Fig. 2.

The pulleys l2 and i3 may, of course, be spearate pulleys cooperating with the spindle or may and the quill preferably has a scale H which may cooperate witha pointer carried by a rod l8 to indicate the position of the said quill. Means comprising a shaft IQ for moving the quill 9 may also be provided in the customary manner.

The parts thus far described form no part of the present invention and are disclosed therein 'merely to assist in the understanding of the invention which cooperates therewith.

It will be noted that the motor 20 is preferably of the vertical shaft type, that is, a motor built with bearings and other parts of the proper kind to operate satisfactorily when the shaft is in a vertical position. By providing a motor of this type it becomes possible to belt the same directly to the drill spindle without requiring any twisted belts or idler pulleys cooperating therewith and the arrangement is materially simplified. The motor may have a switch 32 mounted thereon for convenience.

The motor has a shaft 2| carrying a cone pulley 22, having any desired number of steps, as

23, 24 and 25in the specific instance illustrated. This cone pulley is suitably'secured to the shaft 2| and it is, of course, obvious that a series of individual pulleys arranged adjacent one another will accomplish the same purpose, if preferred.

A belt 26 is provided to connect the pulleys 23, 24 and 25 with the pulleys l2 and I3, on the spindle H, and in order to make .it possible to employ a single belt for this purpose it is obvious that means must be provided for shifting the motor shaft 2| with respect to the drill spindle ll, because the various pulleys are of different diameters and would, of course, require either belts of different lengths or a' shifting of the motor as a whole, if a single belt is to be used.

This shifting of the motor to vary the distance between its shaft and the spindle of the drill may be accomplished in a very simple manner by providing a. suitable rod or rods 21, passing through bores in the bosses or lugs 28 formed in the drill head 2, two such rods being shown in the form illustrated. Each of the lugs 28 preferably has a boss or lug 29 formed thereon, and suitably threaded to receive a clamping screw 36. The motor 20 is carried by said rod or rods 21 and it is obvious that by slightly loosening the clamping screws 30 it becomes possible to shift the rod or rods 21 in the bores in lugs 28 to secure theproper tension of the belt 26, whereupon the said rod or rods 21 may be again secured by use of the clamping means 30.

If the pulley intended to be driven by the motor were always properly alined in a horizontal direction with the desired pulley on the motor shaft, there would be no further adjustment necessary to provide proper operation of the drill spindle from the motor shaft. However, it may be that the desired motor and drill pulleys are not in proper horizontal alinement with one another, in which case, of course, it becomes necessary to shift one or the other of them vertically with respect to the remaining one. Obviously either of the pulleys could be so shifted, but for reasons of simplicity in operation and ease of manufacture it is simpler to shift the motor vertically, leaving the adjustment of the drill head undisturbed. This may be accomplished by the means indicated generally at 3| in Figs. 1 and 2 and shown in greater detail in Figs. 3, 4' and 5.

The mechanism which, as stated, is indicated as a whole by reference character 3| in Figs. 1 and 2, comprising a plate 33, which may be socured to the rod or rods 21 in any desired way, for example by nuts 35 engaged on the reduced threaded ends 36 of the rods 21., as best shown in Figs. 4 and 5. It is thus obvious that the plate or sub-base 33, together with the rod or rods 21,

- forms a rigid structure, which forms a relatively stationary portion with respect to which the motor and its motor base support may be adjusted vertically, that is, in a direction parallel to the shaft II of the drill.

In order to provide for such adjustment of the motor, a further plate 34 may be provided which is held flat against the plate 33 by means of brackets 31 secured to the plate 34 in any suitable manner, for example, by screws 38. Each bracket 31 has a projecting portion 33 which, together with the plate 34, forms a suitable channel to receive an outer edge of the plate 33. Suitable openings 40 of elongated form may be provided in the plate 34 in order to receive the nuts 35 and reduced ends 36 of the rods 21, but permit relative motion in the direction of sliding inthe said brackets. Each of the brackets 31 is also preferably slotted, as shown at 4|, and similar slots 42, alined with said slots 4| of the brackets may be formed in the plate 34, as best shown in Figs. 3 and 4.

Through these slots 4| and 42 may pass bolts 43 adapted to pass also through the customary bolt holes provided in the base of the electric motor 20, whereby said motor may be rigidly secured to the plate 34 by tightening the nut 44 on each of the bolts 43, lock washers 45 being preferably interposed in the customary way to prevent loosening of the said nuts 44. The bolts 43 may advantageously be of the type commonly known as carriage bolts, which have squared portions just beneath the head, as shown at 46, which will engage the sides of the slots 4| and 42, whereby each bolt as a whole will be prevented from,

34 by means of the bolts and thus partaking of the sliding motion thus provided.- Itis also obvious that the motor 28 may be clamped in any desired position with respect to the plate 34 by suitably shifting the bolts 43 in the slots 4| and 42, in order to bring one of the pulleys 23, 24 and 25, attached to the'shaft 2| of said motor, into initial horizontal alinement with one of the pulleys l2 or L3 arranged on the drill spindle IL This initial adjustment is useful in a way which will be explained in greater detail in discussing the operation of the device. 8

In order to adjust the plate 34 as a whole up and down with respect to the plate 33, a mechanism is provided which consists in the form shown in Figs. 1 to of a rack and pinion, the rack comprising a series of teeth indicated at I41 and cut in a vertical edge of the plate 33 and the pinion consisting of a series of corresponding teeth meshing with the teeth I41 and provided in a member 48 which is pivoted about a bolt or the like 49 secured to the plate 34 by means of a nut 58, a washer 5| being preferably interposed between the nut and the member 48.

A spacing bushing 52 as well as a bearing washer 53 may also be locatedaround the said bolt 49, as best shown in Fig. 5. The head of the bolt 49 is preferably of the type known as a flat head, as shown at 54 and is countersunk so as to be flush with the outer surface of the plate 34 so that said head 54 will not obstruct any of the other parts of the mechanism. The member 48 is suitably bored to receive the bushing 52 whereby said bushing 52 constitutes a hearing or pivot about which member 48 may be turned and the washer 53 serves as an abutment and reinforcement against which one end of the bushing 52 bears when the nut 58 is tightened on the bolt 49.

The member 48 is, of course, suitably counterbored to receive the washer 53 and the length of the bushing 52 is made sufficient to prevent the member 48 from binding upon the same when the nut 58 is tightened, whereby the bolt 48 and its cooperating bushings and washers may be adequately and securely tightened without interiering with the free operation of the member 48 about its pivot.

It is clear that by reason of the meshing of the pinion teeth 55 of the member 48 with the rack teeth M1 on the member 33, the plate 34 will be caused to move with respect to the plate 33, whenever the member 48 is rotated about its pivot.. In order to provide definite degrees of movement of the plate 34, the said plate 34 may be provided with a notched segment 56, best shown in Figs. 3 and 4, said segment being provided with any desired number of notches, three being illustrated in the presentcase, and designated as 51, 58 and 59, respectively' A cooperating stop, made preferably in the form of a slidable pin, 68,-having a suitable head or handle 61, may be supported by an arm 6|" of the lug 63 and at its other end may bear against the washer 85 secured to the pin 88 by means of of the parts it is obvious that the inner end of the pin 88 will always tend to snap into any one of the notches 51, 58 or 59, with which it may come into alinement, thus preventing any further relative rotation of the member 48 with respect to the plate 34 one such locking engagement of the pin 88 has taken place in any of said notches. 1

By properly spacing these notches 51, 58 and 59 to provide the desired intervals of vertical movement of the plate 34, it is obvious that said plate'34 may be rapidly and automatically adjusted into desired positions of vertical adjustment, the motor 28 being raised or lowered as a whole, together with the plate or base 84 to which it is secured. These vertical intervals of movement corresponding to the distances between the notches 51, 58 and 58 are preferably chosen to be equal to the vertical distances between the central planes of the pulleys 23, 24 and 25 and are preferably uniform with one another, although this is not always indispensable or necessary.

Referring now to the modified motor base, shown in Figs. 6 and '7, it will be noted that the plate 33,'which in the preceding form carries the rack teeth I41, is now provided instead with a series of notches in one edge, said notches being designated respectively as 68, 88 and 18, and being three in number in the form illustrated, this number corresponding to the number'of steps or pulleys used on the motor and being spaced apart by intervals corresponding to the thicknesses of said respective steps or pulleys.

A pin 1| having a suitable handle or head 12 is adapted to cooperate with the notches in the edge of the plate 33, for example in Fig. 6, the end 13 of the pin 1| is shown as engaged in the notch 58. The pin 1| may be actuated by means i of a spring 84 bearing against a washer 65 and secured by a pin 86, these parts being identical in construction and operation with those of the preceding form. The pin 1| may be slidably mounted in a bore '14 of 9. lug or extension formed on or secured to the plate 34, as clearly shown in Figs. 6 and 7. The remaining structure shown in Figs. 6 and '1 is identical with the structure denoted by similar reference characters in the preceding figures.

It will be noted that the upper and lower notches 68 and 18 differ from the central notch 88 in that each of said outer notches has one edge longer than the other, in other words, the outer portion of each of these notches has a certain degree of overhang. The pin 1| is so arranged that the end 18 thereof may be drawn to the left from the position shown in Figs. 6 and '7 to an extent sufficient to clear the projections 18 and 11 formed between the notches 68, 89 and 18, but not sumciently far to clear the overhanging portions" and 18, so that even when the pin 1| is drawn to the left as far as possible, the end 18 will nevertheless catch on either 18 or 18, thus limiting the total range of movement of plate 84 with respect to plate 38 for a purpose which will be explained when the operation of this form of device is discussed.

The extent of sliding movement of the pin 1| in the bore 14 may be thus limited by reason of the abutment of the washer 65 against the inner end 88 of the portion 15, or in any other suitable way, to secure the desired result.

The form of device shown in Fig. 8 is identical in all respects with that disclosed in Figs. 6 and 7 with the exception that in the Fig. 8 form a lever 8| is provided, which may be pivoted to the mem- A further modification for accomplishing the desired results is disclosed in Fig. 9. In this figure the plate 33 may be provided with a slot 84 extending partly within the plate proper and formed partly in a tab or extension 85, extending preferably at right angles to the edge of said plate 33. This slot 84 accommodates a short pin or stud 86 secured to one arm of a lever or operating handle 81, which issubst'antially identical in structure and function with the portion 8| of the member 48 illustrated in Figs. 2 to 5, that is, this member is pivoted about the bolt 49 having the nut 58 located thereon and hasa slidable pin 68 with a head 61 and a surrounding spring 64, said sliding pin 68 cooperating with notches 5'1, 58 and 59'inthe segment 56, precisely as in the Figs.'2 to 5 form, but differs from said form in that the short end as of the lever 81 terminates merely in the pin 86, which is engaged slidably in the slot 84, instead of having a set of p1n1on teeth out therein.

This slot 84 is made of suitable length to accommodate the pin or stud 86 when said pin moves to the right or left, due to rotation of the lever 81 about its pivot at 49 and the parts are so proportioned that when the end of the latch pin 68 engages in the respective notches 51, 58 and 59 of the segment 58, said pin 86 will raise or lower the plate 34 by the desired amounts corresponding to the thickness of'the pulleys or steps of the cone pulleys on the motor shaft. The pin 68 will, of course, lockingly engage or latch in any one of these notches exactly as in the form shown in Figs. 1 to 5.

A still further modification is disclosed in Figs. 10 and 11. Here again the plate 33 is made to be very similar to the same plate as shown in Fig. 9, that is, it has a projecting lug 88 at one edge thereof and the plate 34 is provided with a series of holes 88, 98 and 9|, which are spaced apart a distance corresponding to the desired spacing of the pulleys or steps.

A pin 92 carried by a spring 83 secured at 84 to the plate 33 and having a. head 95 for con venience in manipulating it, is arranged to pass through a suitable aperture 96 in the plate 33 and engage in any selected one of the openings 88, 98

or 8|, so that the plate 34 may be adjusted up or down to the proper extent, by merely pulling the pin' 92 out of engagement with plate 34 against the effort of the spring 93, whereupon the plate 34, together with the motor carried thereby, may be manually lifted or lowered until the pin 92 automatically snaps into the desired one of the holes.

The extension or lug 88 will serve also as a safety stop and prevent the plate 34, together with the motor carried thereby, from accidentally falling, by engaging against the upper bracket mem- In other respects the remaining parts of Figs. 9 and 10 are identical with those of the preceding figures.

Referring now t) Fig. 12 it will be seen that the motor 28 is carried by a plate or base I34 corresponding in function to the plate 34 of the preceding figures, the motor being connected to said plate I34 by means of the bolts 43 and nuts 44 as in said previous forms and being capable of preliminary adjustment in slots in said plate I34 exactly like the slots 42 in the plate 34.

The plate I34 differs, however, from the plate 34 in having a flange or lug 91 arranged at or near its upper end and extending substantially at right angles to the plate I34. This lug 91 is provided with a screw-threaded bore 88 receiving a screw 99 provided with a handle or other operating means I88 and with an indicator MI. The pitch of the thread of the said screw 99 is preferably made equal to the center-to-center distance of the pulleys or the cone pulley steps on the shaft 2 I.

The indicator I8I may be a pointer or any other desired element capable of giving a point of reference when the operating means I88 is rotated to turn the screw 99. The plate I33 also may be provided with a lug or flange I82 extending substantially at right angles thereto and adapted to serve as an abutment for the end I83 of the said screw 99. The plate I 34 slides freely vertically with respect to the plate I33 by means of the brackets 31, which are identical with those in the preceding forms.

The form described in Figs. 13 to 15 inclusive is similar in general to the Fig. 12 form, except that it is more elaborate and more convenient, and is positive in operation. A plate 233 corresponding to the plate 33, of Figs. 15, and a cooperating plate 234 corresponding to the plate 34,

are provided, the plate 234 having a lug or projection I84 extending preferably at right angles at or near its upper end, as shown, and cooperating with the upper end I85 of a screw I86, which passes through a lug or flange I87 attached to or forming a part of the plate 233 and threaded at I88 .to receive said screw I86, said screw having also a preferably unthreaded extension or shaft I89 which passes through tion II8, which may be formed on or secured to the lower end of the plate 233 and have a bore III to afiford a bearing for the of the screw. The pitch of the thread of the screw I86 is preferably made equal to the centerto center distance of the pulleys or cone pulley steps on the shaft 2I. The screw shaft I 89 is preferably provided with an operating member I I2, here shown as a star wheel.

The shaft I89 of the screw is provided with a slot or groove II3 cooperating with a pin or latch I I4, which is actuated by means of the spring II5, which urges the pin II4 to the left,in the position shown in Figs. 13 and 15. A head II6 may be provided on said pin II4 for ease of manipulating the same in order to cause the end II! of the pin to be withdrawn from the groove H3 and a pin H8 and washer H9 may be provideclllzo retain said spring II5 engaged on the ,pin

This pin II 4 may conveniently pass through a on the lug H8.

The operation of the various devices above described is as follows:

Referring flrst to the form illustrated in Figs. 1 to 5 inclusive, it will be noted that in Fig. 1 the belt 26 links the lower step I3 of the cone pulley, on the spindle I I of the drill, with the middle step 24 of the cone pulley 22 on the motor shaft 2I and this belt is properly tightened so that the device is in operative condition.

Let it now be assumed that it is desired to decrease the speed of the drill spindle to its lowest another lug or projecshaft portion I 89 possible speed. This can evidently be done by disengagingthebelt 25 from the step 24 and engaging it in the step 25, while leaving it engaged with the step 13 of the other cone pulley. How ever, in Fig. 1 the step 24 is in horizontal alinement with the step 13, whereas the step 25 is not in such alinement with the step 13, and, moreover, as adjusted in Fig. l, the belt is of just the proper length to, correctly connect the steps 24 and I3 and it would be too long to connect the steps 25 and i3.

Therefore, in adjusting the, apparatus to cause the belt 26 to link together the steps 25 and i3 properly, the first operation is to raise the motor 20, as a whole, by means of. the handle 61, which is done by first pulling the pin 60 out of engagement with the notch 58 (Fig. 4) and thenraising the head or handle 61 of the said pin 60 until the inner end of the pin 60 alines with the notch 51. The spring 64 will, of course, cause the inner end of the pin to spring into said notch 51 and thereby secure the element 6|.in a definite position with respect to the plate 34.

Inasmuch as the plate 33. which is secured to the rods 21, is held at a definite elevation by reason of the fact that said rods 21 are held at a definite vertical position with respect to the head 2 of the drill, this operationof the member GI will cause the plate 34 to rise adefinite distance, due to the engagement of the pinion teeth'55 of the member 48 with the teeth of therack I41.

This distance is made to be equal to the distance from center-to-centerofthe steps of the :cone pulleys, in the original designing of the apparatus, so that the mere act of raising. the

7 said lever 6| into proper position to cause the pin 60 to engage in notch 51 will automatically elevate the entire motor and the cone pulley carried thereby accurately to a distance equal to the said center-distances of the various steps or pulleys, thus properly alining the step 25' with the step I3 in a horizontal plane. i h V The motor when so raised to adjust the step 25 into horizontal alinement with the step, 13 will be lnthe position indicated in the dashed .lines in Fig. 3, which show alsoithe positions assumed by the supporting plate 24 and the mechanism carrid thereby, including the lever 61 and its cooperating parts. However, inasmuch as the belt 26 would now be too loose, it is necessary to move the motor shaft 2| to a greater spacing from thedrill spindle H and this is accomplished by moving the entire motor toward the left from the. position indicatedinFig. 1,

namely, by loosening the thumb screws 30 and sition shown in Figs. 1, 3 and 4 will, ofcourse,

result in horizontally alining, the step 23 with the step 13 and in this case the belt 28 would be too short, so that; of course, the rods' 21 would be moved to the right'from the positions shown in Figs. 1 and 2 and then clamped at a suitable position of adjustment by using the said thumb screws 30.

It is, therefore, obvious that any one of the steps on the cone pulley 22 may thus be alined with either step of the cone pulley on the spindle II and it will, of course, also be understood that vention.

Briefly expressed, this invention relates to means for bringing the motor shaft pulley quickly and accurately into the proper horizontal alinement with the drill spindle'pulley and for also rapidly adjusting the belt to its proper tension and it is clear that many other. ways of doing this will obviously also be included under. the same inventive idea.

In order to bring the motor initially into the position shown in Fig. 1, wherein one step such as 24 is alined horizontally with a step of the other pulley, such as I3, use may, of course, be made of the customary clamping bolts 43 and nuts 44 cooperating with the slots 4| and 42 (Fig. 3) so that the motor may be initially adjusted manually to bring the pulleys into such proper horizontal alinement and thereupon the motor may be permanently secured to the plate 34 by tightening the nuts 44, inasmuch, as any later adjustment- 0f the motorin a vertical direction, when in use, is done automatically by the mechanism just described and operated by means of the handle '61. i 7

While the form of the device described and illustrated in Figs. 1 to 5 inclusive is the preferred form and provides for very easy manipulation of the motor by reason of the leverage provided by the arm 6|, it is clear that owing to the greater f expense of manufacture of this form of the device it may in some cases be desirable to provide a simpler and cheaper mechanism for accomplishing similar results.

This may be done, for example, by the form of device illustrated inFigs. 6 and '1. Here again the plate 33,whioh is supported by the rods 21, serves to support the plate 34 upon which the motor is mounted, as in the form just described. but instead of the pivoted lever 6|, alug 15 housing the pin 1lwith its handle 12, is substituted, and this pin 1| may be moved out of engagement with the notch 69 by pulling out the handle 12' just as in the prior described form.

However, inasmuch as no rack and pinion is provided in this form, the motor is raised'or lowered manually by raising or lowering the handle 15 a suflicient distance to cause'the inner end 13 of the pin 11- to engage in the selected one I of the notches 68, Stand 10, these notchesbeing'spaced apart the correct distance to correspond to the center-to-center distances of the various steps or the cone pulleys.

It is clear that in this form of device, if no means were provided to prevent it, it might be possible through carelessness or accident to allbw the entire motor together with the plate 34 to drop off the plate 33, at least to the extent permitted by the openings 40 in the plate 34., In order,however, to prevent such accidental undesired dropping of the plate.34 the shoulder 19 is caused to extendiurther to the left than the shoulders 16 and '11 and inasmuch as the leftward'motion of'the pin 1| is limited toan extent only slightly more than suflicient to clear the shoulders I8 and I1, it is obvious that, in case of an accidental dropping, the end I3 of the pin II would catch on the shoulder I9 and thus prevent the motor from-falling to more than the intended and necessary distance. Similarly the shoulder 18 which also extends to the left of the shoulders 16 and 11 will automatically prevent the plate 34 from being raised more than the neeessary amount, so that this portion of the adjustment becomes automatic and prxavents any accidental derangement of the device.

The operation of the Fig. 8 form is substantially the same as that of the form shown in Figs. 6 and 7, the only additional feature being the provision of the lever 8 I. It is clear that upon grasping the handle in the hand and at the same time including the long arm of. the lever 8I in the grasp of the operator, upon depressing said lever the short arm thereof will draw the pin 'II to the left a distance sufllcient to disengage the inner end I3 from the notches, whereupon the plate 34 may be moved up or down, as in the other somewhat cheaper to construct in that it substitutes a pin and slot mechanical movement for the rack and pinion.

In other respects, however, the operation of this form is identical with that of the Figs. 1 to 5 form and in fact itmay be considered merely as having a specialized'form'ofrack and pinion, the rack considered as a single tooth of having only a single tooth space, namely, the slot v84 may be'considered as forming a tooth space between two rack teeth and the pin 86 may be the pinion. With misunderstanding of the device it is clear that the Fig. 9 form is merely a special case of the Figs. 1 to 5:form, wherein the gearing is very much simplified by removing all unnecessary teeth from 'both'the rack and the pinion.

The pin 68 will, of course, cooperate with the notches 51, 58 and'59 in exactly the same way as in the Figs. 1 to 5 form and the relative dimensions are made such that shifting said pin from one of said notches to thenextwill cause the plate 34 to be raised or lowered to an extent exactly equal to the center-to-center distances of the pulley steps, just as in the Figs. 1 to 5 form.

The form shown in Figs. 10 and 11 is the sim-'- plest of all and may be used whereextr'eme cheapness is a determining factor. The operation of this form consists in manually raising or lowering the motor, together with its supporting plate 34, afterthe pin 92 has been withdrawn from the plate 34 by pulling it out, by means of its head 95.

The holes 89, 98 and 9| are, of course, spaced apart distances equal to the center-to-center distances between the steps of the cone pulleys, so that when the pin 92 springs into anyone of said 'holes the motor will be latched in itsproper po- 'sition to cause certain of the "steps tobe alined with one another in a horizontal direction.

The lug 88 in this'form will serve to limit the sliding movement of the plate :34 to the necessary distances, because said lug will abut against one or the other of the two left hand brackets 31 when the plate is raised or lowered to its extreme positions. It would even be possible of course, in the form shown in Figs. 10 and 11 to eliminate entirely the upper hole 89, because the lug 88 would, nevertheless, determine the proper lower position of the plate 34 by abutting against the upper plate 31, but it is deemed preferable, nevertheless, to provide the hole 89 in order to furnish a positive locking of the plate 34 against upward movement.

The operation of the forms above described depends on gears or levers or upon mere lifting and lowering of the motor manually. The operation of the forms disclosed in Figs. 12 to 15, however, depends upon screws instead of such gears, levers, etc.

Referring first to Fig. 12 it will be noted that the operation of this form is extremely simple and depends merely upon raising the motor 20 together with its mounting plate or base by turning the screw 99 by means of the operating means I08. As stated, the pitch of said screw is preferably made equal to the center-to-center distance of the pulleys or the steps of the cone pulley on the shaft 2I so that rotation of the screw 99 through one complete revolution will cause the plate I34 to be raised or lowered a corresponding distance with respect to the plate I33.

The raising is, of course, positive and is due to the contact between the end I83 of said screw and the upper surface of the lug I82, but the descent of the motor, together with its plate I34, is produced solely by the weight of said parts, which slide freely by reason of the grooves'of the brackets 31, in engagement with the plate I33.

" The extent of rotation of the screw 99 may be readily noted by means of the'pointer or other indicator IIiI, which clearly shows when each revolution is completed by again lining-up in a definite direction of reference, which may, of course, be chosen arbitrarily, that is, it may point toward the shaft 2I,,opposite to said shaft, to the right, or to the left, etc., as preferred. It is clear, however, that this affords a ready means for adjusting the motor vertically to the desired extent and droppage of the motor and its plate I34, due to excessive rotation of said screw 99, is, of course, made'impossible by the fact that the lug 91 would engage against the upper end of the plate I33 and prevent further downward movementof the plate I34 and the motor carried thereby.

The form described in Figs. 13 to 15 is in some respects similar to the Fig. 12 form, but has added features of convenience and utility. It is obvious that by rotating the screw I86 by means of its star wheel H2 or other operating device, the entire plate 234, together with the motor carried thereby, maybe raised by reason of the engagemerit of the end I05 of said screw against the lowersurfaoe of the lug I84.

Here again the rotation of the screw I86 through one complete. revolution will'cause the motor to be raised or lowered the requisiterdistance to correspond to the center-to-center distance of the various pulleys or the steps of the cone pulley and an added convenience is provided by means of the positive latching accomplished by the pin H4 in cooperation with the groove or slot II3.

It is obvious that the end I II of the pin I I4 will snap into the. groove I I3 whenever the pin is alined with the said groove and inasmuch as one turn of the screw corresponds to the desired rise or descent of the motor,'it is clear that it will be necessary merely to disengage the pin Ill from ther rotation and holding the pulleys in proper alincment.

This form also provides a positive liiting of the motor base plate 234 and the motor carried thereby, and the descent, as in the Fig. l2.form, is accomplished solely by the weight of the parts. The downward location of the screw I06 is, however, a further added convenience and improvement over the. Fig. 12 fomnas the screw is less likely to be in the way in this position.

As already mentioned above, it will, of course, be understood that the number of pulleys on the various shafts, that is, the motor shaft or the drill spindle, is purely arbitrary and either shaft may, in certain cases, have only a single pulley, while the other has a. greater number. In order to provide for this in the claims, the term number is used therein in its broader mathematical sense, to mean any positive integral number, inclusive of unity, so that the term number when -used in the claims is, therefore, equivalent to the expression one or more, but does not necessarily mean a plurality, It will likewise be understood that the term "pulley" is for convenience usedto .designate either an independent pulley or merely one of the steps of a cone pulley, where such term appears in the claims. 1

Having described a preferred embodiment of the invention and various modifications thereof, it will be understood that many changes, additions, omissions, etc., can be made thereinwith- ,out departing from the inventive idea, and, therefore, said invention is not to be considered as limited to the specific embodiments illustrated, but only as specified in the following claims.

I claim:

1. In a drive mechanism, in which there are substantially parallel drive and driven shafts, each having a number of spaced pulleys thereon, a motor support whereby a motor embodying such drive shaft may be supported and adjusted independently in two directions at right angles to one another, and comprising an element supported to movein a direction transverse to the axis of rotation of the motor, a sub-base carried by said element, a motor base support carried by said sub-base, means for shifting the motor base support in a direction parallel to the axis of rotation of the motor, and means for predetermining' the extent of such adjustment to be equal to the spacing of said pulleys and for latching the adjusting device automatically when such predetermined adjustment has been made.

2. In a drive mechanism, in which there are substantially parallel drive and driven shafts, each having a number of spaced pulleys thereon, a motor support whereby a motor embodying such drive shaft may be supported and adjusted independently in two directions at right angles to one another, and comprising an element supported to move in a direction transverse to the axis of rotation of the motor, a sub-base carried by said element, a motor base support carried by said subbase, means for shifting the motor base support in a direction parallel to the axis of rotation of the the adjusting device automatically when any such predetermined step has been reached.

, 3. In a drive mechanism, in which there are substantially parallel drive and driven shafts,

each having a number of spaced pulleys thereon, a motor support whereby a'motor embodying such drive shaft may be supported and adjusted independently in two directions at right angles to one another and comprising an element supported to move in a direction transverse to the axis oi rotation of the motor, means for securing said element in its adjustedposition, a sub-base carried by said element and extending in a direction substantially at right angles to the said direction of movement, a motor base support carried by said sub base, and means for adjusting said motor base support in a direction parallel to the axis of rotation of the motor, in a number of predetermined steps each equal to the spacings of the respective pulleys along said sub-base andior locking itin its adjusted position.

4. A motor support whereby a motor may be supported and adjusted independently in two directions at right angles to one another and comprising an element supported to move in a direction transverse to the axis of rotation of the motor, means for securing said element in its ad- 'justed position, a sub-base carried by said element and extending in a direction substantially at right angles to the said direction of movement, a motor base support carried by said sub-base, means comprising a rack and pinion for adjusting said motor base support in adlrection parallel to the axis of rotation of the motor, with respect to raid sub-base and means for locking it automatically at any one of a number of predetermined positions. l

5. In a drivemechanismin which there are substantially parallel drive and driven shafts, each having a number of spaced pulleys thereon, a motor support whereby a motor embodying such drive shaft may be supported and adjusted independently in two directions at right angles to one another, and comprising an element supported to move in a direction transverse to the axis of rotation of the motor, a sub-base carried by said element, a motor base support carried by said sub-base, a lever for shifting the motor base.

support in a direction parallel to the axis of rotation of the motor, and means comprising a number of stops and a latch cooperating therewith for predetermining'a number of steps of such adjustment each equal to the spacings of the respective pulleys and for latching the lever automatically when any such predetermined step has been reached.

6. A motor support whereby a motor may be supported and adjusted independently in two directions at right angles to one another and comprising an element supported to move in a direction transverse to the axis of rotation oi. the motor, means for securing said element in its adjusted position, a sub-base carried by said element and extending in a direction substantially at right angles to the said direction of movement said sub-base carrying a motor base support, and means comprising a rack carried by one of said parts and a pinion carried by the other, for adjusting said motor base support in a direction parallel to the axisof rotation of the motor, with respect to said sub-base and means for locking it automatically at any one of a number of predetermined positions.

7. A motor support whereby a motor may be supported and adjusted independently in two 'at right angles to the said direction of movement,

said sub-base carrying a motor base support, and means comprising a rack carried by one of said parts and a pinion carried by the other, for adjusting said-motor base support in a direction parallel to the axis of rotation of the motor, with respect to said sub-base, and means including a notched segment and latch mechanism cooperating with said segment whereby one of said parts may be adjusted to a number of definite predetermined positions with respect to the other and releasably retained in any such position.

a 8. A motor support whereby a motor may be supported and adjusted independently in two directions at right angles to one another and comprising an element supported to move in a direction transverse to the axis of rotation of the motor, means for securing said element in its adjusted position, a sub-base carried by said element and extending in a direction substantially at right angles to the said direction of movement, a motor base support carried by said sub-base, means comprising a rack and pinion for adjusting said motor base support in a direction parallel to the axis of rotation 01 the motor, along said sub-base, said pinion having an operating member attached thereto, and means for latching said operating member at a number of predetermined positions.

9. A motor support whereby a motor may be supported and adjusted independently in two directions at right angles to one another and comprising an element supported to move in a direction transverse to the axis of rotation of the motor, means for securing said element in its adjusted position, a sub-base carried by said element and extending in a direction substantially at right angles to the said direction of movement, a motor base support carried by said sub-base, and means for adjusting said motor base support in a direction parallel to the axis of rotation of the motor, along said sub-base, said means comprising a shaft having a screw thread thereon and also having a longitudinal groove, a latch cooperating with said groove and engaging therein once every revolution, said screw being threadedly engaged with one of said members and bearing against an abutment carried by the other to provide anumber of definite latched steps of adjustment of one such memher with respect to the other.

10. A motor support whereby a motor may be supported and adjusted independently in two directions at right angles to one another and comprising an element supported to move in a direction transverse to the axis of rotation of the motor, means for securing said element in its adjusted position, and a sub-base carried by said element and extending in a direction substantially at right angles to the said direction of movement, a motor base support carried by said sub-base, said sub-base having latch-receiving notc'hes formed in a side edge thereof and the motor base support having a spring-actuated la-ch member adapted to cooperate with said notches and having also a handle for moving such motor base support with respect to the subbase.

HERBERT E; TAUTZ.

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