US1122828A - Switch-movement. - Google Patents

Description

B. G. WEBSTER. SWITCH MOVEMENT. APPLICATION nun PEB.17, 1914.

l, 1 22,828. Patented Dec. 29, 1914.

2 SHEETSSHEET 1. 48 Q95 46 ATTORNEY B. G. WEBSTER.

SWITCH MOVEMENT. APPLICATION FILED 11:13.17, 1914.

1 1 22, 2 Patented Dec. 29, 1914.

2 SHBETSSHEBT 2. 5s

A TTORNEY snares Parana enrich.

BENJAMIN C. WEBSTER, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR T0 HARVEY HUIBIBELL, INCORPORATED, OF BRIDGEPORT, CONNECTICUT, A CORPORATION OF CONNECTICUT.

SWITCH-MOVEMENT.

Specification of Letters Patent.

Patented Dec. 29, 11914.

Application filed February 17, 1914. Serial No 819,142.

To all whom it may concern: v

Be it knownthat I, BENJAMIN C. VVEB- s'rnn, a citizen of the United States, residingat Bridgeport, county of Fairfield, State of Connecticut, have invented an Improvement in Switch-Movements, of which the following is a specification.

This invention has for its object to provide a simple and IIIQKPBHSIVQ reversible switch movement, of large current carrying capacity, which will occupy but little this specification and using reference characters to indicate the several parts.

Figure 1 is a view partly in section and partly in elevation showing my novel switch mechanism as applied to a key socket; Fig. 2 a plan'view of the lower insulating block and the parts carried thereby; Fig. 3 an elevation of the contact member detached; Figfa a view of said member as seen from the right in Fig. 3; Fig. 5 an elevation of the switch mechanism detached corresponding with Fig. 1 with the exception that the contact member shown in section on the line in Fig. at; Fig. 6 an elevation of a portion of the shaft and a cam carried thereby; Fig. 7 a corresponding view as seen from the right in Fig. 6; Fig. 8 a perspective of the carrying bracketdetached; Fig. 9 a view corresponding with Fig. 5 showing the position of the parts at the instant before the snap movement; Fig. 10 a similar view showing a position of the parts during the snap movement; Fig. 11- a detail sectional view on the line indicated by 11 in Fig. 2, looking in the direction of the arrows; Fig. 12 a view partly in elevation and partly in section showing the application of the invention to a snap switch; Fig. 13 a perspective illustrating a form of contact member especially adapted for snap switches, and Fig. 14 is a perspective of a form of carrying bracket especially adapted for snap switches.

In the form illustratedin Figs. 1 to 11 inclusive. which shows the invention as applied to. a; kevsricketQQderiotes theu'pper insulating block and 21 the lower insulating blockby which the operative parts are carried, said blocks being provided with re-.

cesses which receive the parts, leaving them wholly inclosed. 22 denotes the carrying bracket which is. secured to the lower insulating block by a screw 23 and in which the shaft 24 is mounted to'rotate. 25 denotes a cam which is carried by the shaft and is provided with high points 26 diametrically opposite to each other and with low points 27 diametrically opposite to each other and mid-way between the high points, leaving inclines 41 between the respective high points and low points. The shaft is shown as provided with flat sides and the cam is provided with a correspondingly shaped opening which receives the shaft leaving the cam free to slide longitudinally on the shaft, but retaining it against rotary movement independently of the shaft. 28 denotes the contact member as a whole which has both rotary and longitudinal movement on the shaft and independently of the shaft. 30 denotes a detent member lying on the opposite side of one of the. arms of the carrying bracket from the contact member. The detent member comprises a plate 31 having a hole through which the shaft passes freely permitting the detent member to tilt thereon. (as will be more fully explained) and a detent arm which extends at right angles from the plate and passes freely through an opening 33 in the carrying bracket. A relatively light spring 34, hearing against the plate of the detent member and a washer 35, acts to retain the detent member in its normal position. The contact member comprises a disk 29 which is provided with four equidistant recesses 36, either of which is adapted to receive arm of the detent member. At the center of disk 2.) the metal is punched outward to form inclines 10 corresponding with the inclines of the cam and leaving two high pointsyindicated by 37, which are wholly disconnected from the disk and two low points, indicated by 38, where the metal is left connected to the plate by attachments 39. The high points and the low points of the contact member and the cam are adapted to interlock in their normal or inoperative position, as in Fig. 5, and in operation the high points of the cam force the contact member longitudinally on the shaft to cause its release by the detent member, as in Fig. 9. A relatively strong operating spring 42 acts to force the inclines of the contact member against the inclines of the. cam and to force the cam against the bracket. l/Vashers 43 are shown as interposed betweenthe ends of the spring and an arm of the bracket and the contact member respectively. The arm of the bracket to which the cam is contiguous is provided with looking grooves 44 at right angles to each other, either-of which is adapted to be engaged by the low points of the cam, as in Fig. 5, owing to the longitudinal movement of the cam on the shaft. The contact memher is provided with contact arms 45 extending at right angles th'ereto which are adapted to engage spring contacts 46 and 47.

(as in Fig. 52) leaving the contact arms in a mid-position between the spring contacts, thus breaking the circuit. The next actuation again places the parts in the position shown in Fig. 2. Starting with the parts in the position shown in Fig. 5, rotation of the shaft in either direction will cause the cam to move the contact member longitudinally on the shaft against the power of theoperating spring, as in Fig. 9, until when slightly beyond the position shown in Fig. 9 the contact member will have been moved by the cam far enough toward the left to disengage the contact member from the detent arm. The relatively strong operating spring will then act instantly to force the contact member toward the right, as in Fig. 10, the inclines of the contact member riding down the inclines of the cam.

An instant later the parts will again be in the position shown in Fig. 5. While the parts are in the intermediate position, as in Fig. '10',detent arm 32 will be in engagement with the face of disk 29 of the contact member between two of the recesses 36, consequently the detent member will be tilted slightly against the'power of spring 34, as in Fig. 10. An instant later, however, the detent arm will be in alinement with one of the recesses 36 in the disk'and the parts will at once assume the position shown in Fig. 5,

' it-being understood of course that the cam is looked in either the circuit closing or open circuit position through the' engagement of the low points of the cam with one of the grooves 44 in an arm of the carrying bracket, and that the contact member is locked in either of these positions by the detent arm which is never out 'of engagement with the carrying bracket.

1n the form illustrated in Figs. 12, 13 and 14, in which theinvention is shown as applied to a snap switch, there is but one insulating block, which is indicated by 53, and the operative parts of the switch are covered by a cap 54. The shaft, cam, detent member, detent member spring and operating spring are indicated by 24, 25, 30, 34 and 42 respectively, as before. The shaft is mounted to rotate in a bracket 55 which is provided in its face with grooves 4-1 at right angles to each other, as before, and with two openings 33,

,either of which may receive the detent arm.

The two openings are provided merely in order to make the bracket reversible. The contact member in this form is indicated as a whole by 56. Plate 57 corresponds with disk 29 in the other form and is provided with openings 58 to receive the detent arm. This plate is insulated from the contact arms (30, as at 59, and the contact arms are connected by a cross piece 61 having a clearance opening (32 for the shaft and operating spring. The inclines 40 upon the contact member are provided with high points and low points, the same as before, which it is not thought necessary to illustrate in detail. as the structures are identical with the exceptions noted above. The operation is precisely the same as before. The binding screws, indicated by 63, are each electrically connected with. a spring contact 64, said spring contact being engaged by the contact member to close the circuit which is broken by imparting a quarter turn to the contact member.

Having thus described my invention, I claim 1. A mechanism of the character described comprising a shaft, a contact member having both rotary and longitudinal movement ber cooperating with the cam and having both rotary and longitudinal movement independently of the shaft and providw with rotation of the shaft and cam.

a A mechanism of the character described comprising a shaft, a contact member having both rotary and longitudinal-movement independently of the shaft and provided with inclines,'a cam carried by the shaft and having mchnes cooperating w th the inclines on the contact member, and a detent memher havin an" arm with which the contact member is normally in engagement, the contact member being moved out of engagement with said arm by rotation of the shaft and cam.

4. A mechanism of the character described comprising a shaft, a contact member having both rotary and longitudinal movement independently of] the shaft and provided with inclines, a cam carried by the shaft and having inclines coiiperating with the inclines on the contact member, a detent member with which the contact member is nor-- mally in engagement, the contact member being moved out of engagement with the detent member by rotation of the shaft and cam, andsprings acting against the detent member and the contact member respectively. 7

A mechanism of the character described comprising a shaft, a contact member having both rotary and longitudinal movement independently of the shaft and provided with inclines, a cam carried by, the shaft and having inclines cooperating with the inclines onthe contact member, a detent member with which the, contact member is normallyvin engagement, the contact member being moved out of engagement with i the detent member by rotation of the shaft points and inclines between said points, a

contact member cooperating with the cam and having rotary and longitudinal movement independently of the shaft and provided with corresponding high and low pointsand inclines, a detent member with which the contact member is normally in engagement and springs acting against the detent member and the contact member, the high points of the cam acting against the contact member -to move it longitudinally on the shaft, the contact member and cam interlocking when the former is released by the detent member and the low points of the cam engaging one of the grooves in the bracket after each actuation.

- 7. A mechanism of the character described comprising a shaft, a contact mem- .ber having both rotary and longitudinal movement independently of the shaft and provided with inclines, a cam carried by the shaft and having inclines cooperating with the inclines on the contact member, a detent member with which the contact member is normally in engagement, the contact member being moved out of engagement with the detent member by rotation of the shaft and cam, springs acting against the conta ct member and the detent member and means for locking said'parts after each actuation.

8. A mechanism of the character described comprising a shaft, a bracket therefor having an opening, a cam carried by the shaft and having high points and low points and inclines between said points, a contact member having rotary and longitudinal movement independently of the shaft and provided with corresponding high and low points and inclines, a detent member having an arm passing through the bracket for engagement by the contact member and springs acting against said members respectively.

9. A mechanism of the character described comprising a shaft, a bracket therefor having locking grooves and an opening, a cam carried by the shaft and having high points and low points and inclines between said points, a contact member having rotary and longitudinal movement independently of the shaft and provided with corresponding high points, low points and inclines, a detent member having an arm passing through the bracket for engagement by the contact member, a spring acting against the detent member and a relatively strong spring acting against the contact member to hold said mem-er interlocked withthe cam and the cam in' engagement with one of th locking grooves in the bracket.

10. A mechanism of the character described comprising a shaft, a cam carried thereby and provided with high and low points and inclines, a detent member having a detent arm, a contact member having rotary and longitudinal movement independently of the shaft, said member comprising a disk having equidistant recesses adapted to be engaged by the detent arm and inclines corresponding with the cam, and

, means for normally retaining the contact member interlocked with the cam and in engagement with the detent arm.

11. A mechanism of the character de scribed, comprising a shaft, a contact member having both rotary and longitudinai movement thereon and provided "with opposed inclines, a cam carried by the shaft and'provided with similar cooperating inchnes and detent means with which the contact member is normally held in engagement.

12. In a mechanism of the character described, the combination with a shaft and a cam carried thereby, and having high and low points and inclines between said points, of a contact member having rotary and longitndinal movement independently of the shaft and high and low points and inclines corresponding with the cam, a detent member and means for normally retaining the contact member interlocked with the cam and in engagement with the detent member.

13. In a mechanism of the character described, the combination with a shaft and a cam carried thereby, of a contact member corresponding with the cam and having equidistant recesses, a detent-member having an arm adapted to engage either of said recesses and springs acting against the contact member and the detent member respectively.

' 14. In a mechanism of the character described, the combination with a shaft and a cam carried thereby and having high and low points and inclines between said points, of a contact member having high and low points and inclines corresponding witlrthe cam and equidistant recesses, a detent mem-v ber adapted to engage either of said recesses and springs acting against the-contact member and the detent member respectively.

15. In a mechanism of the character described, the combination with a shaft and a cam carried thereby and having high and low points and inclines between said points, and a bracket by which the shaft is carried and which is provided with looking grooves, of a contact member corresponding with the'cani and having equidistant recesses, a, detent member adapted to engage either of said recesses, a spring acting against the de tent member and a relatively strong spring acting against the contact member to normally retain said member interlocked with the cam and in engagement with the detent member and to retain a low point of the in engagement with the locking recess in the bracket.

Intestimony whereof I aflix my signature in presence of two witnesses.

BENJAMIN C. WEBSTER Witnesses:

FREDERICK D. BAKER, H. MEADE.

copies of this patent may be obtained for in cents each, by addressing the Commissioner of Patents,

' Washington, D. 0.

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