US2395763A - Typewriting machine - Google Patents

Description

Feb. 26, 1946. w. T. SAGNER TYPEWRITING MACHINE Filed March 14, 1945 2 Sheets-Sheet l iNVENTOR WALTER T. SAGNER ATTORNEY Feb. 26, 1946. w. T. SAGNER 2,395,763

TYPEWRITING MACHINE Filed March 14, 1945 2 Sheets-Sheet 2 INVENTOR WALTER T. SAGNER ATTORNEY Patented Feb. 26, E945 TYPEWRITING MACHINE Walter T. Sagner, West Hartford, conn asslgnor to Underwood Corporatio Delaware a corporation of Application March 14, 1945, Serial No. 582,612

(Cl. 19'l66) 10 Claims.

r'nis invention relates to typewriting and other ofilce machines and more particularly to means in such machines for repeatedly power operating carriage supported devices, for example, linefeeding devices for work sheets.

it is one of the objects of the invention to provide efilcient and conveniently controllable power I aside from fulfilling the above objects, is also capable to function efficiently as a carriage moving agency.

Still other objects and features of the invention will be apparent upon consideration of the detailed description which follows, as that description is read in the light of the accompanying drawings in which:

Figure l is a sectional, skeletonized side elevation of a typewriting machine, showing a poweractuated carriage-returning and line-spacing mechanism including controlling devices therefor, said mechanism and controlling devices being shown in their normal positions.

Figure 2 depicts the controlling devices shown in Figure 1 as having been conditioned for obtaining repeat line-spacing operations.

Figure 3 shows on an enlarged scale a portion of the controlling devices also shown in Figure 1.

Figure 4 is a sectional front view of the parts seen in Figure 3.

Figure 5 is a front perspective view of a typewriting machine carriage, together with a margin stop mechanism and portions of the power line spacing and carriage-returning mechanism.

Figure 6 is an enlarged perspective view of certainparts seen in Figure 5 and constituting a portion of a shut off mechanism for the combined line-spacing and carriage-returning mechanism.

Figure? is directed to a modified form of the invention, and more particularly shows in side elevation certain diiTerences over the line-space controlling devices illustrated in the preceding figures.

Figure 8 is a side elevation of a manipulative control also seen in Figure 7, said manipulative control being shown in association with means for indicating diflerent functional positions.

Finally, Figure 9 is a sectional front view of the organization of parts seen in Figure 7.

, Directing attention now more particularly to Figure 1, the machine frame is designated by the reference character l0 and comprises two spaced side walls ll connected by several connecting members including, a bar l2, and a carriagesupporting track-way l3.

Upon said track-way 83, by means of antifriction elements M, is guided, for letter-feed and return movements, in a conventional manner, a carriage designated by the general reference character l5. Said carriage has opposite endpieces l6 which rise from a rail l8, and wherein a platen l l is rotatably supported. A usual spring motor 20 having a strap connection IS with said rail I8 is adapted to impart, in response to-each typing operation, under control of an escapement mechanism 2|, letter-feed movements to the carriage.

Typinginstrumentalities of conventional design may comprise a series of type-bars, one of which is indicated at E2, and which are adapted to swing individually against the front of the platen, to make imprints.

At each operation of a type-bar, as well as also when a spacing key (not shown) is operated, there results an escapement operation of the afore-mentioned escapement mechanism 29. Thelatter may comprise an escapement dog it normally in engagement with a toothed escapement wheel 25, to restrain the carriage i5 against advance by the spring motor 20. The escapement wheel 25 is fast on a shaft 26 which at its upper end carries fixedly a gear Tl meshing with a carriage-supported rack 28. The carriage is caused to escape and advance a letter-feed step in response to each type-bar operation and each operation of said spacing key. The escapement dog 2% permits movement. of the carriage in return direction, that is towards the right. Furthermore, the dog cooperates with the escapement wheel 25 to hold the carriage, upon return, in the letter-feed position to which it has been returned.

The carriage'end-pieces l6 mount a serrated bar 30, which carries for adjustment therealong, a carriage-return-limiting margin stop 35, as well as also a line-end margin stop 29. Said margin stops El and 29 cooperate with a counterstop 32 which is in the form of an upright arm pivoted at a point 33, and which has its upper end projecting "through an opening 3% in a horizontal capping plate 35 of a housing 36 constituting part of the general frame work ill of the machine.

spacing mechanism of the invention may correspond substantially to the mechanism disclosed in the patent to Helmond No.,2,262,676, dated November 11,1941, such mechanism including the afore-mentioned margin stop 3! and the counterstop 32. So far as it is thought necessary for'an understanding of the invention, certain parts and functions of this prior mechanism will now be describedbriefly. I

A preferably continuously operating electric motor, see Figures 1 and 5, carried upon the rear of the machine on the cross-bar l2, drives a shaft 45 terminating at its left end in a drive pinion 4i. Said pinion meshes with a larger gear 42 fixedly carried on a spindle 43. A housing 44 affords a bearing for the shaft 45 near the right end of the latter, and, moreover, provides also journals for the opposite ends of the spindle 43. A-drum 45, normally free to rotate on the spindle 43, has a draw-band 45 attached thereto and adapted to be wound thereon when the pulley, by means to be described, is rotated counterclockwise of Figures 1 and 5. During use of the machine, the motor 38 rotates the gear 42 and spindle 43 continuously, but the drum 45 is unaffected thereby. Said gear 42 has clutch teeth facing in the direction of said drum, and the drum has splined thereto for axial shift, in a manner fully made clear in said patent, a shiftable clutch element 41 having clutch teeth facing but normally clear of the clutch teeth of the gear 42. The spindle 43 rotates normally without effect on said clutch element 41 and the said drum 45, but when'said element 41 is axially shifted into clutched mesh with said gear 42, it will rotate therewith and will cause the drum to rotate and wind the draw band 45. A rock shaft mounted in said casing 44, has fixed thereto a yoke 52 fitting a groove 53 in the clutch element 41. An operating arm 54 carried fast on the shaft 5|, serves to rock the latter and its yoke, to move the clutch, element 41 into and out of clutched engagement with said gear 42. The draw band 45 passes from said pulley 45 over frame-supported guide pulleys 55, 55, onto a pulley 51 which is journaled on the left carriage end 15. An end of the draw band 45 is so attached and wound around the pulley 51 that rightward pull the motor 35, rotates this pulley clockwise and actuates a line spacing device to be presently de-. scribed. A bevel pinion 58 fixed to and rotatable together with said pulley 51 meshes with a gear sector 55 which is pivotally carried on the left care riage end l5. Said sector is integral with a cam 5| against which there bears, under the tension of' a spring 55, a, roll 52 provided on a line-space lever 53 carrying a line-space pawl 54, the latter of which is normally deflected clear of a toothed platen-rotating wheel 55 in a conventional manner. Upon rightward pull of the draw band 45, that is whe the clutch element 41 is in clutched engagement with the gear 42, the gear sector 55 is rotated limitedly and causes an actuation of the line-space pawl 54, to impart a 1ine-feed movement to the wheel 55, and therefore the platen. When, by means hereinafter to be described, the clutch element 41 is declutched from the gear 42, said spring 55 returns the sector 55 to normal position against a stop 51. To keep the of the draw band, as effected by the power of draw band 45 taut at all times, and to cause it to be wound back onto the: drum 45, the latter is under constant tension of a draw band windin spring 58 contained in a barrel 15, it being understood that the line-space lever returning spring 55 is superior to the spring 45.

Connected to the arm 54 of the clutch shiftin mechanism, by means of a link 1|, is an arm 12 comprising part of a lever 13 pivoted at 14 to a. rear wall of the aforesaid housing 35. The rightward extreme of the arm 12, as seen in Figure 5 and also Figure 1, is normally engaged by va latch 15 which is pivotally carried on the outer side of the right side wall II of the machine by a. headed screw 15. The lever arm 12 is normally restrained against upward movement by the latch 15, and thus the spring 11 is restrained from closing the clutch comprised by the element 41 and the gear 42. Said latch 15 is releasable under control of a key, in a manner to be described later, and when released, will enable said spring 11 to actuate said arm 54 and effect clutch closure through said yoke 52. Consequently the drum 45 will be motor-actuated to operate, through the medium of the draw band 45, the pulley 51 and the associated line-spacing device. After a limited rotation of the gear sector 55, the band 45 .picks up the carriage to effect its return.

Means are provided so that as the margin-stop 3| engages the counterstop 32, the lever 13 will be given a restoring movement resulting in disruption of the clutch connection. In order that engagement of the retum-limiting margin stop with the counterstop 32 may disrupt said clutch connection, the said lever 13, see Figures 5 and 6, has pivoted thereto a transverse link 15, which in turn is articulated at 55 to another transverse link 51 ,said links forming a toggle. The link 5i is guided near its left end in a vertical slot 15 provided in a wall of the housing 35 and rests upon a lug or shelf 83. A link connects the counterstop arm 32 with the'link 8|, the link 89 having a pin-and-slot connection 85 with the link 51 in order to give normally the counterstop 32 capacity for a leftward movement within the confines of the opening 34, for line-locking purposes, as fully described in said patent to Helmond.

Assuming the carriage l5 to be in an intermediate position the toggle is in the condition shown in Figures 5 and 6, and a toggle-link nose 5| is somewhat below a control bar 52 extending along the full length of the carriage. Upon release of the lever 13 from the latch 15, the toggle will flex-upwardly into contact with the control bar 52. The control bar 52 is mounted for downward diagonal movement on the carriage, against the tension of a spring 33, the bar being provided at opposite ends with diagonal slots 54, whereinto there extend headed mounting pins projecting from a part of the carriage frame work. As the pulley 51 is rotated by the draw band 45, incident to line-spacing, in the manner hereinbefore stated, a pin 55 engages a hook-shaped appendix 55 of the control bar 52, to displace the latter diag'onally in a downward direction. The result is that the bar 52 presses down on the nose 9i and causes the toggle 18, 8| to assume a more straightened condition and, furthermore causes the counterstop arm 32 to be displaced leftwardly through the medium of the link 85, and against the opposition to the spring 55, the power of the spring 11 being superior to that of the spring 55. There being nothing except the spring motor 25 to oppose the travel of the carriage in return direction, the carriage return draw band 45 will, after the actuation of the line-spacing mechaaseavea 'ougii a verti nism, draw the carriage rightwardly. Evtuaily, the return limiting margin stop 36 engages and moves the counterstop 32 rightwardly to the extent permitted by the opening ac. Therefore the toggle is moved also to the right, it being understoodjthat the still lowered control her 92 meanwhile opposes upperward flexing 'of the toegle. The result is that a clutch-opening movement is imparted to the lever I3 and in turn to the yoke 82. Thus the combined line-spacing and carriage return operation is automatically brought to a conclusion and the line-space actu-j atlng mechanism restores. If by this time the latch is no longer held operated, the said lever I3 will automatically become relatched.

After the line-spacing mechanism has thus been power actuated and after the carrlage has been power-returned, it is possible to obtain additional line-spacing operations through repeated closure-of the said clutch. Obviously, operation of the latch I5 anytime while the carriage is returned against the counterstop 32 will result in a line-spacing operation.

At the end of such line-spacing operations, the lever I3 receives its clutch opening movement in direct response to the actuation of the control bar 92. This is because the counterstop 32 is held to the right by the carriage, and the toggle I8, 8|, in being acted upon by the bar 92, will expand to the right and displace the lever I3.

The mechanism described to this point is substantially the same as that disclosed in the aforementioned patent to Helmond No. 2,262,676 and the description from here on is directed to an improved controlling mechanism whereby repeat line-spacing operations are conveniently obtainable at will and whereby, if desired, the machine may be caused to yield with certainty no more than one single line-spacing operation.

As has been stated, the latch I5 normally occupies the position seen in Figures 1 and 5. In

the form of the invention illustrated in Figures- 1 to 6, a key 91 in the keyboard of the machine, when operated, will cause the latch I5 to be swung rearwardly, clear of the lever I3.

The mechanism for supporting the key 91, and the mechanism by which this key is connected to said latch will now be described.

As is best seen in Figures 3 and 4, said key III is in the form of an elongate block which is hollowed out or recessed as at 98. The key block heads and is fastened to a vertical plate IOI, said plate having horizontal ears I00 through which screws extend upwardly into the key. In order to guide the key 9! for operation in a vertical direction, the lower end of the plate IOI is pivotally carried on the forward end of an arm I02, by means of a shouldered screw I03, said arm being mounted for pivotal movement about an axis as at I04. A spring 99 may urge the arm I02, and thus also the key 91, to a normal position determined by an abutment, not shown. Another uide arm I05, arranged above the guide arm I02, has extending through a perforation therein, at its forward end, a stud assembly generally designated'by the numeral I06, see Figure 4. Said stud assembly is rigidly carried on a vertical key stem I0I of a repeat line-spacing key H0, and comprises, a pin having a large head III and a reduced portion H2, and a shouldered bushing II3 carried on said reduced pin portion I I2. The entire stud assembly is held fast on the key stem II by a screw I09 threaded into the reduced pin portion II2 as depicted in Figure 4, the reduced portion of the shouldered bushing H3 extends slot use provided in the keyauppos plate Iii, and fits a perforation in the armiild. It will thus be seen that the keysupporting plate is effectively guided ior' vertical movement by the stud assembly I06.

When it is desired to obtain a single linespacing operation, the key 07 is operated to the exclusion of the key N0, the. stud assembly- I08 remaining stationary. The key-supporting plate IN is guided at its upper region on the reduced portion of the shouldered bushing I I3, whereas therebelow another guide is aflorded by reason of the articulation oithe plate with the swinging arm I02. To give the key greater stability when at, rest and during operation, the arm I02 is extended upwardly and forwardly to fit guidingly between one side of the plate IM and a tongue III bent off therefrom.

The connection from the key 9! to the clutchcontrolling latch I5 comprises a lever I I6, pivoted intermediate its ends on a pivot rod III and having an arm reaching under a pin II8 projecting laterally from the key mounting plate IOI. At the rear, the lever has a pin I20 situated behind a Ipendant arm I24 which is integral with the latch I5. For guidance the lever 'II6 extends at the front through a slot in a comb plate I23, and is laterally contained at the pivot location in a.vertical slot provided in a traverse bar I2I. A spring I22 has an anchorage on the cross bar I2I and is attached to the lever IIB to urge it towards the normal position seen in Figure 1, wherein the lever abuts the upper limit of its guide slot in the plate I23, and Wherein, furthermore, the pin I 20 on the lever may be slightly spaced from the pendant arm I24. The extent of operation of the lever I I6 is limited by a stop plate I26 carried on the comb plate I23. When the operator depresses the key 91, the lever H6 is operated and the latch I5 is moved clear of the lever arm 12, by the pin I20. This releases the lever arm I2 to the action of the spring TI and results in a winding operation of the drum 45. Consequently there will ensue an actuation of the line-spacing mechanism, this being followed .by a return of the carriage in the case the carriage is not already stationed in return position. At the end of such operation the toggles III, III will have been acted upon by the bar 92 and the counterstop 32 will have been displaced to the right, with the result that these aggregate efiects will have caused the restoration of the lever I3 to open clutch position. If the key 91 has mean-while been released, the lever I3 will become automatically relatched by the latch I5. In order to suppress clutchclosing movement of said lever I3, in the case the operator holds the key 91 depressed, there is provided a holding means in the form of a secondary latch IZI. This secondary latch I 21 is pivotally supported by the screw I6 which also supports'the latch "I5. It will be seen from Figures 1 and 5 that the clutch-controlling lever arm I2 is normally unobstructed by the secondary latch I21, and, furthermore, that the latching shoulder of the latter is situated slightly lower than the latching shoulder of the latch I5. A downward branch I29 of the latch I2! reaches to the rear of the pin I20, and a spring I30, oppositely attached to the latch branches I24, I29, tends to keep the latches in contact with each other just above their latching shoulders. Operation of the key 91 forces the latch I5 rearwardly to release the lever arm I2; while the secondary latch I ZI tends to move rearwardly but is being temporarily obstructed by the released lever arm 12, which assumes a closed clutch position. However, providing the key 21 is held depressed, Just as soon as the lever arm I! is being restored, said secondary latch I21 will catch over the arm 12 and will suppress or prevent with complete certainly a reclosure of the clutch. The clutch-opening movement imparted to the lever 13 is slightly excessive so that the lever arm 12 may be caught underneath the shoulder of the latch I21. Upon release of the key 31, the latches 13 and I21 reassume their normal position. In doing so, the latch ll catches over the lever arm 12, holding the latter in open clutch position.

From the foregoing. it is evident that an operation of the key .1 alone, whether of short or long duration, results in no more than a single power line-spacing operation, it being understood that additional line-spacing operations are obtainable by additional operations of the key 31.

when the work calls for extensive paper advance, the key I I is preferably operated. Operation of the latter will eiiect the release of the primary latch 15, and in addition thereto, will incapacitate the secondary latch I21. Thus, there will ensue one line-spacing operation upon another so long as the key III is held depressed by the operator, the lever 13 being caused to move to closed clutch position upon the operation of the key H0, and being thereafter automatlcally moved to such position upon each clutch opening movement occurring while the key is still held depressed. .1

The lower end of the stem Illl of the key Ill is forked for vertical guidance on the shouldered screw I03, and the key IIII may be arranged to recede into an opening in the key-block 31. In order that operation of the key III! will result in an operation of the latch 15, the forward end of the lever H6 is extended sufficiently to underlie closely the bushing II3 of the afore described stud assembly I06. For incapacitatin the-latch I21 at the depression of the key IIIl, there is arranged to the left of the lever H3, pivoted and guided in the same manner as the latter, another lever I3I, the forward end of which underlies the stud-head III, and the rear end of which has a pin behind a forwardly and upwardly reaching extension I33 on the secondary latch I21. With said lever standing in normal position, as depicted in Figures 1 and 5, there is suiiicient clearance intermediate said pin I32 and said extension I33 for the secondary dog to move rearwardly into effective position when the key 91 is operated. However, when the key III! is operated, the :pin I32 on the lever I3I, as illustrated in Figure 2, moves forwardly against said extension I33, and holds and incapacitates the secondary latch. The lever I3I is springurged to normal position and its motion is limited in the same manner as the lever H6 The key 31 may receive some downward motion at the depression of key 0, through bottoming of the bushing II3 in the slot I08, as shown in Figure 2.

With the structure described to this point, an operator will find it most convenient to obtain a single carriage return and/or line-spacing operation by simply depressing the key '91. If linespacing is to be repeated, the key H0 is depressed and the desired number of operations are conveniently obtainable by simply varying the duration of key depression.

asosnes According to the embodiment of the invention. illustrated in Figures '1', 8. and 9. it is conceived to render' the secondary latch either permanently operative, or permanently inoperative. To this end there is substituted for the key II. and its connections leading to the pin I32. a control knob III. This knob has integral therewith an eccentric III. together with which it is rotatably mounted upon the frame for holding the secondary latch I21 at will in an inoperative position.

' The knob and eccentric are Iastened on a short shalt I38 by means of a screw I31, the ahait being rotatably supported in a bearing provided on the right side wall II of the machine. and having a large flat end I33 adioining said bearin at the inner side of the wall. Said shaft end I33 is resiliently engaged at its opposite flat sides by spring prongs III! which may be formed, as shown, of one piece and which may be anchored by a stud Ill to the side wall II. Itwill be seen that the said prongs Ill, by cooperation with the flat shaft end I", tend to position and hold the eccentric I35 in either one of-two rotative positions. In Figure 'l the eccentric I33 has been turned so that it holds the latch I21 clear of the operating path of the clutch shifting lever 13. If the key 31 is operated with the eccentric I35 positioned as in Figure 7, there will result one line-spacing operation alter another so long as the key '91 is maintained depressed, the lever 13 only becoming held in open clutch position in response'to the last clutch opening movement imparted thereto after the release of the key. If the eccentric I35 is given a half turn from the position seen in Figure "kit will be stationed in a position allowing the secondary latch I21 to snap freely into position over the lever arm 12 when the latter is forced to normal position upon the first actuation of the draw band II. In other words, the latch I21 will prevent reclosure of the clutch even though the latch 15 may be held-operated by the key 31, it being understood that, as the key is released, the primary latch 15 moves into holding position. The knob I34, see Figure 8, may be provided with an indicator I42 cooperating with appropriate legends upon a machine mask indicated at I43, see Figure 9, to indicate the position of the eccentric I35. Rotative movement of the cam is preferably conflned to 180 by two stops I.

It is to be understood that the invention comprehends changes, variations, and modifications which come within the scope of the claims hereto appended.

What I claim is:

1. In a typewriting machine, the combination with a limitedly operable line-spacing device, of power means, normally idle actuating means for said line-spacing device, a normally open clutch interposed between said line-spacing device and said power means, closable for actuation oi said line-spacing device by said actuating means, a line-spacing key, means, responsive to the oper ation of said key to eiiect a. clutch closing operation, and responsive automatically to the ensuing actuatian of the line-spacing device to effeet a clutch opening operation, and further responsive thereafter to repeat such clutch closing and opening operations until a clutch opening operation is preceded by a restoration of said 3 key, means to suppress clutch closing operation of said responsive means after the first clutch closing and clutch opening operation thereof has ensued in response to an operation of said key, and means, including a manual control, to render which is movable from and returnable to a predetermined position on said frame, of a linespacing device on the carriage, an electric motor on theframe, normally inefiective drive means intermediate said motor and said device,-

adapted to operate said device and, if said carriage is not already stationed in the said position, to return the carriage to the said position, said driving means including a normally open clutch to render it effective, resilient means tending to close said clutch, a latch to hold said clutch normally in open position, a key, means to render said latch released through operation of said key, thereby to cause closure of said clutch, by said. resilient means, means to open said clutch forcibly as a result of the ensuing aggregate operation of the line-spacing device and the return of the carriage, means to restore said line-spacing device automatically upon opening of the clutch, said latch being controlled to hold said clutch open again upon the release of said key, normally ineffective, holding means so controlled by said key that with said key held operated, said clutch will be held open upon it being opened, thereby to prevent repeat operation of said line-spacing device, and means to incapacitate said holding means optionally, whereby when said holding means is incapacitated, and said key is operated and held operated,

there will ensue repeat operations of said device,

followed by restorations key is held operated.

3. In a typewriting machine, the combination with a limitedly operable line-spacing device, of power means, normally idle. actuating means for said line-spacing device, a normally open clutch interposed between said power means and said actuating means, and means to close and to open said clutch, comprising, two operable elements, means responsive to operation of one, or conjoint operation of bothsaid elements to close said clutch, means responsive to limited operation of the line-spacing device to effect a clutch opening operation, and means responsive to said clutch opening operation only if both said elements are continued to be held operated, to render said clutch reclosed, whereby repeat operation of the line-spacing device can be obtained, said clutch opening and closing means including also means responsive to the operation of one of elements alone, regardless of the duration of operation, to close said clutch only once, and including also means responsive to the operation of the line-spacing device to open said clutch and hold it open pending a new operation of said one or both said keys.

4. In a typewriting machine, the combination with a reciprocatory carriage which is movable from and returnable to a predetermined return position, of an operable device on said carriage, power means, normally idle actuator mean connectable with said power means to operate said device and also to return said carriage to said predetermined position if the latter is not already returned, and means to connect and to disconnect said actuator means from said power means, comprising two operable elements, and means, responsive to operation of at least one of said two elements to render said actuator means connected, and responsive to the aggregate operation of said device and the return of thereof, so long as said the carriage, or, in the event the carriage .is in returned position, responsive to the operation of said device alone, to render said actuator means disconnected, and further responsive to a each disconnection of the actuator means, if both said elements are operated and held operated, to render said actuator means reconnected for repeat operation of said device, said responsive means including means responsive to the operation of one of said elements to the exclusion of the other, and regardless of the duration of such operation, to render said actuator means connected only once, and responsive to the first operation of said device to render said actuator means automatically disconnected.

5. In a typewriting machine, the combination with a reciprocatory carriage which is movable to and from a predetermined position, of an operable line-spacing device on said carriage, power means, normally idleactuator means connectable with said power means to operate said device and also to power-move said carriage to said predetermined position if the latter is not already stationed in such position, and means to connect and to disconnect said actuator means from said power means, comprising two operable elements, and means, responsive to operation of at least one of two elements to render said actuator means connected, and responsive to the aggregate operation of the line-spacing device and power movement of the carriage to the said position, or, in the event the carriage is stationed in said position, responsive to the operation of said device alone, to render said actuator means disconnected, and further responsive to each disconnection of the actuator means, if both said elements are operated and held operated, to render said actuator means reconnected for repeat operation of said device, said responsive means including means responsive to the operation of one of said elements to the exclusion of the other, regardless of the duration of such operation, to render said actuator means connected only once, and responsive to the operation of said device to render said actuator means automatically disconnected.

6. In a typewriting machine, the combination with a reciprocatory carriage which is movable to and from a predetermined position, of an operable line-spacing device on said carriage, power means, normally idle actuator means connectable with said power means to operate said device and also to power-move said carriage to said predetermined position if the latter is not already stationed in such position, and means to con nect and to disconnect said actuator means from said power means, comprising two operable elements, means, responsive to operation of at least one of two elements to render said actuator means connected, and responsive to the aggregate' operation of the line-spacing. device and power-movement of the carriage to the said position, or, in the event the carriage is stationed in said position, responsive to the operation of said device alone, to render said actuator means disconnected, and further responsive to each disconnection of the actuator means, if both said elements are operated and held operated, to render said actuator means reconnected for repeat operation of said device, said responsive means including means responsive to the operation of one of said elements to the exclusion of the other,

to render said actuator means automatically disconnected, means including a key for operating comprising, two operable elements, and means, responsive to conjoint operation or both said elements to render said actuator means connected to said power means for a line-spacing operation, and responsive to the operation of the line-spacing device to render said actuator means automatically disconnected, and further responsive to each disconnection of the actuator means, so long as both said elements are held operated, to render said actuator means automatically reconnected, whereby repeat operation of the line-spacing device is obtained, said responsive means including means, responsive to the operation of one of said elements to the exclusion of the other and regardless of the duration of operation or such element, to render said actuator means connected for a single line-spacing operation and to suppress reconnection thereof after the resultant operation of the line spacing device.

8. In typewriting machine, the combination with a line-spacing device, power means, normally idle actuator means connectable with said power means for operating the line-spacing device, and control meansto connect and to disconnect said actuator means from said power means, comprising, two operable elements, means, responsive to conjoint operation of both said elements to render said actuator means connected to said power means for a line-spacing operation, and responsive to the operation of the line-spacing device to render said actuator means automatically disconnected, and further responsive to each disconnection of the actuator means, so long as both said elements are held operated, to render said actuator means automatically reconnected, whereby repeat operation of the line-spacing device is obtained, said responsive means including means, responsive to the operation of one of said elements to the exclusion of the other and regardless of the duration or operation of such element, to render said actuator means connected for a with a llmitedly operable line-spacing device, of

power means, normally idle actuating means for said line-spacing device, means including .a normally open clutch interposed between said power means and said actuating. means, said clutch adapted to be closed and opened respectively to cause an operation and a restoration of said linespacing device, and means to control said clutch,

comprising, two keys, and means responsive to the operation of one or both or said keys to render said clutch closed and cause an operation or the line-spacing device, and responsive automatically to each operation of the line-spacing device, to

open said clutch and to cause the restorationof the line-spacing device, said responsive means including a provision controlled by said keys in a manner so that if both said'keys are held in an operated position at the moment the clutch is opened, the said responsive means will automatically reclose said clutch for another line-spacin operation, and so that if only one key or none is held operated at said moment, there will be no reclosure of the clutch excepting by renewed keyoperation.

10. In a typewriting machine, the combination with a limitedly operable line-spacing device, of power means, normally idle actuating means for said line-spacing device, a normally open clutch interposed between said line-spacing device and said actuator, closable for actuation of said linespacing device, a line-spacing key, means, responsive to the operation of said key to effect a clutch closing operation, and responsive automatically to the ensuing actuation of the linespacing device to efiect a clutch opening operation, and further responsive thereafter to repeat such clutch closing and opening operations until a clutch-opening operation is preceded by a restoration of said key, means to suppress clutch closing operation of said responsive means after the first clutch closing and clutch opening operation thereof has ensued in response to an operation or said key, and means including a control settable to one or another position, to render said suppressing means either operative or inoperative.

WALTER T. SAGNER.

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