US1758206A - Rotary switch - Google Patents

Description

May 13, 1930. T, N RYAN ET AL 1,758,206

ROTARY SWITCH Filed Oct. 27, 1927 5 Sheets-Sheet l @Wm M May 13, 1930. T, V RYAN ET AL 1,758,206

ROTARY SWITCH Filed 001;. 27, 1927 5 Sheets-Sheet 2 E3, 1930.. T. VAN RYAN ET AL 1,758,206

ROTARY SWITCH Filed Oct. 27, 1927 5 Sheets-Sheet 3 May 13, 1930., T. VAN RYAN ET AL 1,758,206

ROTARY SWITCH Filed Oct. 27, 1927 5 Sheets-Sheet 4 May 13, 1930. T. VAN RYAN ET L 1,758,206

- ROTARY SWITCH Filed Oct. 2'7, 1927 5 Sheets-Sheet 5 I l i 1 T012 [Q12 (/2! 12%! 0275621161" 12 .Mw

Patented May 13, 1930 UNITED STATES PATENT OFFICE TONY VAN RYAN AND ALFRED ALSAKEB, OF CHICAGO, ILLINOIS, ASSIGNOBS TO THE DELTA STAR ELECTRIC COMPANY, OI CHICAGO, ILLINOIS, A CORPORATION OI ILLINOIS ROTARY SWITCH Application filed October 27, 1927. Serial No. 229,002.

Our invention relates in general to disconnecting switches and more particularly to rotary bearings for-such switches.

' One of the objects of our invention 15 to provide an improved rotary bearing in which the rotating sleeve, that carries the insulator stack to which the switch blade is attached, is

supported by ball bearings for easy turning movement.

Another object is to provide an improved rotary bearing which may be adjusted so as to compensate for any wear that the switch bearing under oes when in use.

Another ob ect is to provide means for raising or lowering the rotary bearingso' as to bring the switch blade that it carrles in contact with the contact terminals in a very simple manner without dismantling the bearing. This feature is especially useful when a number of these switches are operated to? gether, as to control a polyphase circuit.

Another object is to provide positive means in a rotary bearing of this character for first raising the insulator stack carried by the bearing a predetermined amount and then positively rotating it.

Another object is to provide an improved step-by-step motion which is similar to the so-called Geneva movement used in clocks, motion picture machines, and the like.

Another object is to provide an improved rotary bearing that may be used with very little change on disconnect switches of the upright or underhung type.

There are other objects of our invention, which together with the foregoing, will be described in the detailed specification that is to follow, taken in conjunction with the accompanying drawings.

In practicing our invention we provide two stationary insulator stacks carrying contact members. A rotary insulator stack mounted upon our improved bearing is positioned midway between the two stationary stacks, and carries the switch blade, that is adapted to make contact with the contact members upon the stationary insulator stacks. The construction of our improved bearing is such that the rotary insulator stack is first raised so as to break the hind between the switch blade and the contact terminal, and then rotated. This operation renders the opening and closing movements of the switch to be performed very easily.

Referring now to the drawings:

Fig. 1 is a side elevation of our improved disconnect switch in its vertical or upright position;

Fig. 2 is a view partly in elevation and partly in longitudinal section of our improved bearing showing the mechanism for first raising the rotary insulator stack and then rotatmg 1t;

Fig. 3 is a cross section of our improved bearing along the line 33 of Fig. 2 looking in the direction of arrows;

Fig. 4 is a detail cross section along line 44 of Fig. 2 looking in the direction of the arrow, and showing the manner in which the spur gear may be adjusted;

Fig. 5 is a detail section of the ear box and worm taken along the line 5-5 of Fig. 2 looking in the direction of the arrows;

Fig. 6 is a longitudinal section partly in elevation of a modification of our improved bearing showing the changes necessary when our improved bearing is used on an inverted type disconnect switch;

Fig. 7 is a side elevation of one of the contact members for an inverted type of switch;

Fig. 8 is a side elevation of a disconnect switch, that is underslung, that is, the blade of the switch is below the base;

Fig. 9 is a cross section along the line 9-9 of Fig. 10; and

Fig. 10 is a partial longitudinal sectionof a modified form of our improved bearing showing an adaptation of the so-called Geneva movement.

Like reference characters in the various figures apply to similar parts.

We shall first describe the preferred embodiment of our invention with particular reference to Figs. 1 to 5, inclusive.

The particular disconnect switch to which our improved bearing is connected has been described in detail in our copending application, Serial No. 198,769, filed June 14, 1927, to which reference is made for a more detailed description of the construction and operation of a disconnect switch, which will only be described briefly in the present application.

Referring now more particularly to Figs. 1 to 5, inclusive, we shall describe the preferred embodiment of our invention. A tubular member or switch blade is positioned above three spaced insulator stacks 16, 17 and 18. The swltch blade 15 is rigidly secured in any suitable or well known manner to the middle insulator stack 17. The insulator stacks 16, 17 and 18 are of the usual construction. The insulator stacks 16 and 18 carry the contact members 19 and 20 that are adapted to be contacted by the switch blade 15. Sleet shields 21 and 22 are associated with these contact members. Each end of the switch blade is provided with a contact making member which is so constructed as to give good contact between the switch blade and the contact members 19 and 20. The construction of the contact members 19 and 20, the sleet shields 21 and 22, and the contact'making members carried by each end of the switch blade 15 has been described in our copending application above referred to and need not be discussed here.

The intermediate insulator stack 17 1s mounted upon a rotary bearing 23 posltioned in the switch base 24.

The insulatorstack 17 is provided with a metal casting 25 on its rear end, Fig. 2, having a flange 26 bolted to a flange 27 of a rotatable tubularelement or sleeve 28. The flange portion 27 of the tubular sleeve is provided with two projections 29 that fit into slots 1n the guiding or aligning members 30. The guidmg members 30 are secured by bolts 31 to a housing 32. The housing 32 is provided with a flange 33 at its lower end which serves as a means to secure the gear casing 34 to the housing.

The rotatable sleeve 28 extends downward- 1y into the housing 32. This sleeves-28 is held in place by 'a ring-like member 35 which is threaded into the housing 32 and contains on its underside a diagonally shaped surface which together with an inner flanged surface of the housing 32 forms a ball bearing race for bearings such as 36. A grease washer 37 of felt or other suitable material is interposed between the tubular housing 28 and the ring member 35 to prevent the escape of grease from the bearings. The ring member 35 has a castellated edge so that the bearing may be adjusted.

a The lower end of the rotatable sleeve is held in a bearing 38 which comprises a ringmem ber 39 threaded into a projection in the hous-' ing 32. The upper edge of the ring member 39 is castellated so that it maybe adjusted, and the lower end contains a bearing surface forming a ball race, together with the projection 40 on the inner side of the bearing housing 32, for ball bearing such as41. A. bolt.

42 is threaded into a hole in the housinfi and serves as an opening by which the caste ated ring member 39 may be raised or lowered so as to adjust the bearing 38. The bolt 42 is provided with an extenslon 43 that is adapted to fit in the opening of the castellated edge of the ring member 39 and lock it in place. A bolt 43 is threaded into a hole in the housin 32 and provides means by which the ball bearings such as 41 may be placed in position in the bearing 38. The tubular sleeve 28 is provided with a shoulder 45 which has a worm gear 46 formed integrally with it. The worm gear 46 is adapted to cooperate with a worm 47 attached to a central shaft 48 in any suitable manner, such as by splining.

The lower end of the tubular sleeve 28 is provided with two key-ways 49 which cooperate with keys 50 suitably held in slots in the hub 51 of the spur gear 52. The keyways 49 and the keys 50 permit the tubular sleeve 28 to be moved longitudinally with respect to the hub 51 of the gear 52, but prevent its rotation unless the gear 52 is rotated. The spur gear 52 is rotatably held on the shaft 48 between a boss 53 and a collar 54. The s ur gear 52 is provided with suitable bearing surfaces to reduce the friction when the shaft 48 is rotated while the spur gear 52 remains stationary.

The spur gear 52 is adapted to mesh with a spur gear 56 which is rotatably mounted on an eccentric shaft 57 by means of a sleeve 58. The shaft 57 is provided with an eccen trio 59, Fig. 4, so that the spur gear 56 may be adjusted. By loosening the bolt 60 which is threaded into an. opening in the housing 32 and locks the shaft 57 againstrotation. and by loosening the nut 61 on the end of the shaft 57 the shaft may be rotated by the screw driver slot 62.. The eccentric 59 rovides that the spur gear 56 is forced into closer mesh with the spur gear 52, also 63 and 66. The sleeve 58 is provided with a two deck gear 63 at its lower end, Fig. 3. This gear is provided with three bottom teeth 64 and two top teeth 65 and is ada ted to cooperate with a two deck gear 66 aving two top teeth 67 and a ring-like lower formation 68. The gear 66 is suitably'splined to the shaft 48. The eccentric 59 also provides means for hinging the gears 63 and 66 into closer mesh.

The lower end of the central shaft 48 is rotatably mounted in ball bearing 69 and 70 of any standard construction, which are pressed into shoulders in the housing 32.

The lower end of the shaft 48 carries a worm gear 71 suitably attached thereto, that is adapted to cooperate with a worm 73, Fig. 5,

carried by a shaft 74 rotatably held in place in the closing members 75 attached by means ofbolts 76 and threaded tubular bushings 77 to the (gear casing 34. The bolts 76 and threade bushings 77 constitute means by gear 71 in addition the shaftmay be shifted horizontally to turn the worm gear 7l. That is, by means of the threaded bushings 77, the closing members 75 may be positioned closer to or away from the gear casing. By positioning the upper closing member 75 closer to the gear casing lower closing member 75 away from the gear casing, the shaft 74 that carries the Worm 73 may be shifted in one direction. The reverse operation shifts in the other direction. The movement of the worm 73 causes the rotation of the worm gear 71 and the shaft 48 in one of two directions for a purpose that will be described hereinafter.

The shaft 74 is provided with a clevis 78 at each end. These clevises are for the purpose of connecting the operating mechanism of the switch shown with other switches of the gang for polyphase operation. Of course, one of these clevises may serve to connect the shaft 74 with the operating handle, not shown, in any usual or well known manner.

Attention is directed to the fact that a spacing washer 79 may be positioned between the bearing 70 and the worm gear 71 in order to hold the shaft 48 firmly. The upper portion of the central shaft 48 carries a stop washer 80 that serves to prevent the upward movement of the tubular sleeve 28 after it has progressed a predetermined distance. The stop washer 80 is held in place by the nut 81 attached to the end of the shaft 48.

At the lower end of the shaft the worm to being splined to the shaft is held firmly in place by the washer 82 and the nut 83.

The guides 30 which are attached to the upper end of the housing 32 serve to align the whole assembly of the rotary bearing and the insulator stack 17.

The Whole bearing is filled with grease through a suitable grease gun connection (not shown) in the usual manner.

Having described the mechanical construe tion of our improved bearing, we will now explain the operation of the switch having this hearing as a mounting for the rotary insulator stack 17. The switch is operated by turning a handle which causes the rotation of a shaft 74 and the consequent rotation of 48 through the operation of the worm 73 and worm gear 71. Since the shaft 48 is supported in the ball bearings 69 and 70 it rotates very freely. The rotation of the shaft 48 brings about the rise of the tubular sleeve 28 through the operation of the worm 47 and the worm gear 45. It will be seen that the gear 66 attached to the shaft 48 is rotated, while the spur gears 56 and 52 hold the sleeve 28 against rotation until the top teeth 67 on the gear 66 engage the top teeth of the gear 63 in its path. That is, the ear 63 cannot be rotated until contacted by t e teeth 67 on the gear 66. The ear 66 is so positioned that its top teeth 67 are in which the shaft 74 the position shown in Fig. 3 when the blade 15 of the disconnect switch is in engagement with the contacts 19 and 20, so that the shaft 48 carrying the gear 66 may be rotated through substantially one revolution before the gear 63 may be rotated. Until this time the gear 63 is locked against rotation b the engagement of the bottom teeth 64 with the lower portion 68 of the gear 66. Since the auxiliary shaft 57 carries the spur gear 56 which is in mesh with the spurear 52 the spur gear 52 cannot rotate thougi the shaft 48 rotates within it. The tubular sleeve 28 is keyed between the hub 51 of the spur gear 52 so that it is only permitted to move longitudinally so long as the spur gear 52 does not rotate. The tubular sleeve 28 is thus raised by the worm 47. This raising operation continues until the top teeth 67 of the gear 66 engages the top teeth 65 of the gear 63 in its path. This raising movement is sufficient to raise the flange 27 so that its extensions 29 are spaced above the slots in the guides 30. In addition this raising movement is sufficient to raise the contact members carried by the tubular blade 15 of the switch out of engagement with the contact members. 19 and 20 carried by the insulator stacks 16 and 18. This raising movement serves to break any bind between the contact making members and the contact members, whether this bind be due to static friction or ice or sleet. By the worm gears 47 and 45, respectively, a tremendous greater leverage exists to secure this longitudinal raising movement than could be secured for simply turning the blade horizontally with the contact members in engagement with the contact making members.

By the engagement of the first top tooth 67 of the gear 66 in engagement with the top tooth in its path of the gear 63, the sleeve 58 carrying the spur gear 56 is rotated through 90 degrees. The gear 66 comes to a stop in the position shown in the drawing, with the gear 63 rotated 90 degrees. The rotation of the gear 63 brings aboutthe rotation of the spur gear 56 and the spur gear 52. About the rotation of the gear 52 its top 51 to which the tubular sleeve 28 is keyed is rotated, whereby the tubular sleeve carrying the insulator stack 17 is also rotated 90 degrees to bring the switch blade 15 to an open position. During the movement of the gear 52 the shaft 48 is also rotating at the same speed and there is 'no relative movement between the Worm 47 and the worm gear 46.

With the gear 66 back to its original position the further upward movement of a sleeve 28 is prevented by the stop washer 80 attached to the main shaft 48.

In closing the switch, the operation occurs in a reverse manner. That is, the rotation of the shaft 48 in a counter-clockwise direction brings the top teeth 67 into engagement with the top teeth of the gear 63 and causes. inagang so that they will all work in unison.

this ear to be rotated through 90 degrees. This rings about the operation of the spur gears 56 and 52 to rotate the sleeve 28 carrying the insulator stack 17 through 90 degrees, thereby positioning the switch blade 15 about the contacts 19 and 20. Since the shaft 48 rotates at the same speed as the tubular sleeve 28 there is no relative movement between the worm 47 and the worm gear 46. After the gear 63 has been rotated to 90 degrees it is locked in this position and the gear 66 is free to turn back to its original position. By this latter operation the tubular sleeve 28 is lowered longitudinally until the contact making members carried by the switch blade are properly in engagement with the contacts 19 and 20.

It will be seen that this arrangement between the gears 66 and 63 gives the gear 63 an intermittent rotary motion of a very positive character. The connection between the gears 66 and 63 might be toward a lost motion connection. By this arrangement of these gears in the bearing a highly advantageous structure is formed, not only because it permits the raising of the tubular member 28 before it is rotated, but because it is positively locked so thata positive raising movement is first obtained followed by a positively turning movement. No dependence is placed on friction at all, the parts are locked for one movement or another.

These switches are very often operated in gangs. That is, it is desirable to operate a number of these switches simultaneously. In this event the shafts 7 4 of the various switches are suitably connected together in any well known or desired manner so that when the shaft 7 4 is rotated all the shafts similar to it in the gang will be rotated. The operation of the various switches under these conditions are identically the same as has been described. Sometimes when the switches are operated in a gang the contact making members carried by the blades 15 may not be properly positioned with respect to their contact members. If the remaining contact making members carried by the other switch blades are properly positioned it is necessary that the one out of adjustment be brought into adjustment without operating the other switches. In order to accomplish this result the bolts, such as 76. are loosened and the threaded bushings 77 are suitably adjusted, as has been before described to permit a movement of the shaft 7 4 in one or the other direction to rotate the worm wheel 71. attached to the shaft 48. The rotation of the shaft 48 serves to operate the tubular member 28 to raise or lower the insulator stack 17 to properly position the switch blade 15 at its contact making members. This arrangement renders it very easy to adjust the contact making members of the various switches when they are operated Since the shaft 48 of the rotary bearing is supported in the ball bearing 69 and its rotation is very free. face furnished the shaft 48 by the hub 51 of the gear 52 serves to hold it firmly in place. The tubular member 28 is also supported by ball bearings, one at either end. This renders the movement of the tubular members very easy.

When the gears, such as 66 and 63 become worn, as well as the gears 52 and 56 the play between them can be suitably compensated for by loosening the locking bolt 60 and the nut 61 and turning the eccentric shaft 62 by means of a screw driver so that the gears 56 and 63 are brought into closer mesh with the gears 52 and 56, respectively. Any wear in the upper bearing supporting the tubular member 28 can be compensated for, as has been explained. member 28 can be threaded into the housing 32 by means of a wrench in a well known manner. The castellated ring member 39 which controls the adjustment of the lower ball bearing can be threaded into the housing 32 by removing the bolt 42 and placing a screw driver through the holeand into the castellated edge of the ring member 39. In this manner the lower bearing 38 may be very readily adjusted.

It will be seen that the guides 30 which are placed on the housing 32 by means of the bolt 31 serve to align the tubular member 28 with respect to the housing.

It will be noted that we have provided a highly efiicient rotary bearing for a switch so that the stack supported byit is mounted rigidly and its various movements brought about in a very positive manner. In addition we have provided means whereby the switch blade may be adjusted in a convenient manner to properly position the contact making members carried thereby. provided means which may be very easily operated to compensate for the wear occasioned in the bearing. It will be obvious, however, that since all parts subject to wear and strain in bearing are supported by ball bearings that the wear and strain on these parts will be very slight.

Another great advantage of our improved bearing is that it may be used with very little change where it is desired to change the mounting of disconnect switches such as shown in Fig. 1 which are of the upright type to disconnect switches shown in Fig. 8 which are of the underhung or inverted type.

Referring now to Figs. 6, 7 and 8, we shall describe our improved bearing when use in a switch of the inverted type. In this case the insulators 16, 17 and 18 are suitably suspended from the base 24., Fig. 8. The intermediate insulator 17 carries tubular switch blade 15 at its lower end. The tubular swit h The long bearing sur That is, the castellated ring We have also blade 15 is provided with the usual contact making members that have been described in our copending application above referred to. These contact making members are adapted to cooperate with contact members 85, carried by the insulator stacks 16 and 18. The movement of the rotary bearing 23, which supports the insulator stack 17 is first to raise the switch blade 15 and then to rotate it. The manner in which the contacts 85 are chan ed to provide for this operation of the switc blade is shown in Fig. 7. The contact making members 85 are suitably attached to the insulator stacks 16 and 18 in any usual or well known manner. The contact making member is somewhat U-shaped, its lower surface 86 being the contact surface. A copper plate 87 is suitably attached to the part 86 by means of bolts 88. This copper plate is the contact terminal proper. The contact member 85 has an outwardly extending portion 89 to which a copper plate 90 is suitably attached by means of bolts 91. A lug 92 is attached to the extension plate 90 in any desired manner and serves as a means by which the electrical circuit is connected to the switch. A flexible conductor 93 is attached to the copper plate 91 by the clamping means 94. This flexible conductor is also attached to the contact plate 87 by the clamping means 95. The flexible conductor 93 provides a good electrical circuit of high conductivity from the lug 92 to the copper plate 87 of the contact member 85. The contact member 85 is U-shaped in order that the switch blade may be raised to bring the contact making members out of engagement with the contact member plate 87 and then to permit it to be rotated.

The modification necessary inthe bearing in order to give the proper operation to the switch blade 15 may be seen from Fig. 6. This view shows the relative position of the various parts of the hearing when the switch blade is open. The dotted line shows the position of the tubular sleeve 1nen1ber 28 when the switch is closed. The clamping vuide members 30 are somewhat modified, being of a generally U-shaped construction and are provided with extending portions 96 that are adapted to fit into slots on either side of the flange member 28. The thread on the worm 47 and worm gear 48 is reversed so that with the switch in open position, as shown, the rotation of the shaft 48 first brings the switch blade 15 carrying the contact making members above the contact members 85 through the operation of the gears 66 and 63 by which the gear 63 is rotated through a 90 degree angle. The subsequent rotation of the main shaft 48 serves to lower the tubular member 28 carrying the insulator stack 17 until the contact making members are brought into engagement with the contact members 85. In this position tubular member 28 is shown by the dotted line of Fig. 6. Now, when the switch is opened the reverse operations takes place. That is, the tubular member 28 carryin the insulator stack 17 and the switch blad e is first raised until the flange 28 is above the extensions 96 and until the top teeth 67 of the gear 66 engage the top teeth 65 of the gear 63. Thereupon the gear 63 is rotated through 90 degrees to bring about the rotation of the tubular member 28 thus opening the switch blade.

From the foregoing, it will be seen that we have provided a bearing structure which lends itself very readily for use in the socalled upright type of disconnect switch or in the so-called inverted or underhung type. In the underhung type all the advantages and features of the bearing are retained.

We shall now describe a somewhat modified form of bearing in which a modified arrangement is employed for securing first the longitudinal movement of the insulator stack and then the rotary motion. This modification may be seen with reference to Figs. 9 and 10. In this form all the elements of the bearing are identically thesame as have been described in our preferred embodiment shown in Figs. 1 to 5, inclusive, with the exception of the gear mechanism which correspond to the gear 66 and 63, shown therein. The general contour of this gear mechanism may be seen from Fig. 9. A central shaft 48 instead of carrying a double decked gear, as in the previous case, carries an eccentrically shaped member 100 having a lower member of the same shape 101, both being connected together througha roller bearing 102.. This roller bearing is adapted to cooperate with a slot in the slotted member 105 having the curved bearing surfaces 106 and 107. It will be seen that the member 100 carrying the bearing 102 is free to rotate and that the slotted memher 105 cannot rotate as the bearing surface 106 is held firmly against the circular portion or hub 109 and 110 of the members 100 and 101, respectively. However, when the pm 102 falls into the slot 104 the slotted memher 105 is then rotated through 90 degrees. The rotation of the slotted member 105 brings about the rotation of the shaft 57 and operation of the spur gear 56 and 52 to bring about the rotation of the tubular sleeve 28 which carries the insulator stack to which the switch blade is connected. In this case the shaft 57 is not eccentric, but it has the sleeve 58 rotatably attached thereto. The shaft 57 is held in place by being threaded into the housing 3 r When it is desired to close the switch the reverse operation occurs. That is, the-pin 102 first engages the slotted member 105 and turns it through a 90 degreev angle. This operation positions the switch blade 15 above the contact members 19. Thereafter the shaft 48 is free to rotate to lower the contact making extending hub of the mem ers 100 and 101.

The operation of the sleet shields 21 and 22 when the switch blade is opened and closed has been described in our copending application above referred to, as has the operation of the contact makin members and their associated contact mem ers.

It will be seen that the roller 102 which is carried by the eccentric members 100 and 101, together with the slot-ted member 105 constitute a movement of. the intermittent type which is very similar to the so-called Geneva movement.

We contemplate as being included in these improvements such variations and modifications from what is herein specifically illustrated and described as fall within the scope of the appended claims.

We claim 1. In an insulator bearing, a housing, a tubular sleeve mounted for movement within said housing, a shaft rotatably mounted in said housing and extending upward into said tubular sleeve, said sleeve having a worm gear on its inner side, said shaft having a worm adapted to mesh with said gear, a spur gear rotatably mounted on said shaft, and means including said worm gear and sa1d spur gear for imparting a plurality of different movements to sa1d sleeve.

2. An insulator bearing, a housing, a tubular sleeve mounted within said housing, a shaft rotably mounted within said housing extending upwardly into said sleeve, said sleeve having a worm gear on its inner side, said shaft having a worm adapted to mesh with said gear, a spur gear rotatably mounted on said shaft, and connections between said spur ear and said sleeve for permitting longitudmal movement thereof, and another spur gear adapted to mesh with the first mentioned spur gear to control the rotary movement of said sleeve.

3. In an insulator bearing, a housing, a sleeve mounted for movement within said housing, a shaft rotatably mounted within said housing and having an end extending into said sleeve, and auxiliary shaft positioned adjacent to said main shaft, a double deck ear mounted on said main shaft, a second ouble deck gear mounted on said auxiliary shaft adapted to mesh with said first gear, and gear mechanism controlled by said double deck gear for imparting a plurality of different movements to said sleeve.

4. In an insulator bearing, a housing, a hollow sleeve mounted for movement within said housing, a worm gear cut on its inner side, a shaft rotatably mounted within said housing and having an end extending into said sleeve, a worm mounted on said shaft mounted u on each of said shafts adapted .to

mesh toget er, the double deck gear mounted upon the auxiliary shaft including an intermittently operated cam for operating the spur gear mounted upon said auxiliary shaft and thereby operating the first mentioned spur gear.

5. An electric switch 0 erating mechanism mcludmg a driven mem er, a driving member, cam means driven by the driving member for imparting a predetermined motion to the first mentioned member during a portion of the operating period of the driving member, and means effective during the remaining portion of the operating period for imparting a' different motion to the driven member. 6. A switch operating mechanism comprismg an operating member, an operated member supported thereby in telescoping relatlOIlSl'llg, and means including cams operated by the rst mentioned member for imparting successive rotar and rectilinear motions to the second mem er u on the continued rotation of the first mem er.

7. In combination, a'rotatable member, a second member supported thereby and longitudinally and rotatably movable with respect thereto, means for holding the second member agalnst rotation while the first member is rotating, means for advancing the second member longitudinally of the first member during such rotation, and a gear mechanism controlled by the first member for rotating the second member during a different portion of the cycle of operation of the first member.

8. In a switch operating mechanism, a housing, a rotatable member mounted in the housing and extending lengthwise thereof, an intermittent gear mechanism intermittently rotated by the continued rotation of said member, an insulator support, means controlled by the intermittent gear mechanism for rotating the insulator support, and means controlled by the rotation of the member for longitudinally advancing the insulator sup port during the period of non-rotation of the intermittent gear mechanism.

9. In combination, a housing, a shaft within the housing, a worm and worm wheel for rotating the shaft, said shaft having helical threads at one end thereof, an insulator support mounted on said threads, and means driven by the shaft for alternately locking the shaft against rotation and for rotating the shaft, whereby the support is advanced longitudinally of the shaft as the same is rotated while the support is held against rotation.

10. In combination, an operating member, an operated member supported thereby, the support including a telescoping threaded connection, means for holding the operated member against rotation upon the rotation of the operating member, whereby said threaded connection imparts a longitudinal movement to the operated member, and means driven by the operating member and effective in predetermined positions for rotating the operated member at the same speed as the operating member is rotated.

11. In combination, a hollow housing, an-

insulator support extending into the housing, an operating member rotatively sup ported in said housing, said operating member and said support being threaded into telescoping relation and being relatively rotatable and longitudinally movable, and means for holding the insulator sup'port against rotation upon the rotation of the operating member, whereby said member is moved longitudinally by said. threaded connection, said means being rendered ineffective after a predetermined longitudinal movement of the support, and said support being thereafter rotated upon the continued rotation of the operating member.

12. In combination, an insulator support and an operating member screw threaded into telescoping relationship, the operating member supporting the insulator support, a hollow housing within which the operating member is rotatably mounted, said insulator support extending outside of the housing, means carried by the housing for preventing the rotation of the support when the support is in a certain position in the housing, whereby upon rotation of the operating member the support is moved longitudinally, and means effective when the support is in a different position for preventing the longitudinal movement of the support, whereby upon rotation of the operating member the support is rotated.

13. An electric switch operating means 0 comprising driving and driven members in telescoping relation, said members bein rotatable and longitudinally movable Wit respect to one another, a housing within which said members are mounted, the driven member extending outside of the housing, means for imparting successive longitudinal and rotary motions to the driven member, a bearing for supporting the driving member With in the housing, and additional bearings for guiding the driven member within the housing in its rotary and longitudinal motions.

14. In combination, an insulator support, a housing, a helical screw mounted within the housing and carrying the support, means for holding the support against rotation as the helix is rotated, Where y the support is adoperating,

vanced longitudinally of the screw, andmeans independent of the helix for rotating the supadvanced longitudinally of the screw, and

means for rotating the support at the speed of rotation of the helix whereby and the helix rotate as a unit.

16. In combination, a housing, an insulator support within the housing and extending outside thereof, means for imparting rotary and rectilinear motions to the support, a hearing within the housing for guiding the support, and means outside of the housing for adjusting the bearing.

17. In combination, a housing, an insulator support within the housing and extending outside thereof, two sets of gear mechanism within the housing for operating the support, a bearing between the sets of mechanism for guiding the support, and means outside of the housing for adjusting the hearing.

In Witness whereof, we hereunto subscribe our names this 20th day of October,

TONY VAN RYAN. ALFRED ALSAKER.

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