US1606121A

US1606121A - Electric switch

Info

Publication number: US1606121A
Application number: US746062A
Authority: US
Inventors: Jr John B Gury
Original assignee: Individual
Current assignee: Individual
Priority date: 1924-10-27
Filing date: 1924-10-27
Publication date: 1926-11-09
Anticipated expiration: 1943-11-09

Description

J. B. GURY, JR

Nov 9 1926.

ELECTRIC SWITCH ,Filed oct. 27,

l Ltvrq zy@ AM@ kia Patented Nov. 9, 1926.

UNITED STATES JOHN B. GURY, JR., F ST. ItiOII'IS, MISSOUR.

ELECTRIG SWITCH.

Application led October 2-7, 1924. Serial No.'746,062. i

This invention relates to electric switches and more particularly to a switch for multiple circuits and whose vswitching elements are operated simultaneously from a single oper- I ating element. It has for its objects to produce a simple, compact and durable structure which is highly efficient and vwill meet the regulations and requirements as to'safety,

c etc. Other objects andv advantages to be attained will hereinafter more fully appear `in the following specification.v i Y l The invention consists inthe parts and combinations and arrangements of! parts hereinafter described and afterwards pointed out with particularity in the appended claims.

In the'accompanying drawings forming part of this specification and illustrating a practical adaptation of the invention,-

Figure 1 is a side elevation of the switch structure complete, the switching elements being shown in contact with the circuit ter-4 minal elements;

Figure 2 is an end elevation;

Figure 3 is a longitudinal section taken substantially on the line 3 3' of Figure 2, the switching elements being shown in the ott contact position;

Figure 4 is a fragmentary section on the line 4-4 of Figure 1;

Figure 5 is a fragmentary section on the line 5 5 of Figure 1;

Figure 6 is a fragmentary Vsection on the `line 6 6 of Figure 1; and

Figure 7- is a view showing details of the several parts of the switching and actuating elements detached, and a fragmentary section of the insulator body on the line 7e-7 of Figure 1.

Referring now to the drawings, the numeral 1 designates the end members of the` supporting body of the switch, the same being substantially L-shape and preferably built of layers or laminations of sheets of pressed fiber or other suitable insulation material. These end members'are attached to intermediate frame members 2 of subst-antially H-shape and made of metal or any material possessing the required rigidity.

There are two of the frame members 2, one being placed on each side of the members 1, and each has two diagonally opposite legs shorter than the other two, by which shape and arrangement the necessity for making the parts in rights and lefts is obviated.

The

members

1 and 2 are clamped securely together by screw-bolts 3. Terminal plates 4 are secured on opposite sides of the members 1, as by rivets 5 which secure said plates to. the outer layers only (see Figure 6),

there being openings 6 in the two intermedi ate layers to prevent contact of the two opposed rivets and affordample air gap between them. The plates 4 are further secured to .the members 1 by the screws 7 which serve as binding screws for the terminals of the circuit wires, and said plates preferably h ave retaining or guard flanges 8 on opposite sides of said screws 7. Of course, the inner ends of the screws 7 have an ample gap between them (see Figure 5).

Hinged, as at 9, between the members 2, is an actuator member 10 having an operating handle 11. This member 10 has a cross head affording two oppositely disposed

arms

12 and 13, each of which latter having a cross pin 14 protruding on opposite sides thereof.. The relative arrangement of the handle portion 11 and

arms

12, 13, is such 'that when the handle is at the extreme limit of its stroke in either direction (see Figures 1 and 3) the

arms

12, 13, are diagonally disposed and at substantially the same angu- -larity in both of said positions.

roller of brass or other metal of electrical' conductivity, said roller being annularly grooved vbetween its ends affording a pair of heads 18 constituting the roller proper and a connecting neck or shank 19. The portions 18 ride on the arcuate trackways 15 of the members 1, and straddle a bead or rib 2() extending longitudinally of said trackways atv the middle thereof (see Figures 1 and 7 ample clearance being provided between said bead or rib and the neck portion 19 of the roller.

The `vswitching elements each further comprise two parallel like members 21 of compressed iiber or other suitable non-conduct- The spaced members 21 receive the larms 12,

.13, between them and they are bifurcated,

as at 25, to receive the cross pins 14 which work in the slots with just an easy sliding fit. Coiled looselyl about the' members 21 is a spring 26 which is always under compression between the disk 24 and a washer 27 slidably fitted on the reduced portions of the members 21 and abutting the cross pins 14.

By" having the trackways 15 curved on a radius from the axis of the pivot of the actuator 10 and owing to the arrangement of the spring-pressed switching elements between said trackways and the cross pins 14 of the

arms

12, 13, the rollers 18 are held to the trackways both during the actuationof the

arms

12, 13, and when said armsreach the limits of their strokes in either direction and in which positions of said arms the rollers are either in contact with the terminal plates 4 or the frame members 2, as the case may be. y

When the head portions 18 of the roller of the switching element engage the portions 4a and 17 of the terminal plates 4 an electrical cross connection is effectedjbetween the correlated pair of said plates, thereby closing the circuit. When the roller is moved out of Contact with said plates the circuit is, of course, broken.

The novel construction Yand arrangement of the switch is such that both switching elements are shifted from one ext-:eme position to the other at the same time by the operation of the single lever handle 11. So, too, by having the switching elements arranged in tandeminstead of side by side,A

a relatively narrow body is produced without materially increasing the length thereof. Ihat is, a double-throw switch structure is produced which takes up no more room than the usual single-throw switch of the same type. Furthermore, the structure is such that economy of manufacture isA attained and assembly greatly facilitated.

Obviously, the structure admits of considerable modification without departing from the spirit of the invention. It'is,l therefore, not limited to the specific form shown.

What is claimed is:

p 1. .An electric switch comprising a body frame comprising end members' of insulation material at its opposite ends havingopposed arcuate trackways thereon, terminal contact members arranged in pairs at one end of each of said trackways, each corre'- lated pair of said terminal contact members being normally void of electrical connection with each other, switching elements each comprising a spring-pressed roller of electrical conductivity operable on the respective trackways, the end portions of said rollers being adapted to bridge a pair of said terminal contact members, and a single operating lever arranged and adapted to effect the actuation lof said switching elements s1- multaneously in either directionA on their respective trackways.

2. In an electric switch, a body frame having two opposed, arcuate, trackways of insulation material, a pair of like, springpressed, switching elements, each comprismg a roller of electrical conductivity and operable on one of said trackways, a corre-V lated pair of normally disconnected terminal contact members at one end of eachiof said trackways, portions of said terminal contact members affording contiguous extensions of said trackwaysand stops for said rollers of said switching elements wherebT to be engaged and bridged by the respective rollers, anda single operating lever hingedly mounted midway between said trackways and having oppositely disposed arms `in engagement with said switching elements whereby to actuate said elements simultaneously in either direction on said trackways.

3. In an electrical switch of the character described, a pair of oppositely-disposed trackways and a single operating lever midway between them in tandem relation, a correlated pair of terminal contact members at one end of each of said trackways, said contact members being normally void of electrical connection with each other, the correlated pairof said contact members on the one trackway being diagonally opposed to the pair on the other trackway, and a pairof diagonally opposed, like, spring-pressed, switching elements interposed between said trackways and said single operating lever, whereby tovbe actuated by said leversimultaneously in either direction but in opposite directions relative to each other, said switching elements each comprising a roller operable on its adjacent trackway, said rollers being of electrical conductivity and capable -of bridging and electrically connecting the erating lever pivotally'mounted between trackways in longitudinally-opposed rela-- tion with respect to the frame, a correlated pair of normally disconnected terminal contact members on said end members at one end of each of said trackways' in diagonallyopposed relation, a diagonally dlsposed op said intermediate frame members and centrally of the cross-bars thereof, said lever having oppositely-disposed cross-arms assuming an angularity of the same degree diagonally with respect to said body frame in the extreme'reversely operated positions of said lever, spring-pressed switching elements interposed between said lever crossarms and said trackways, said switching elements normally extending diagonally from said cross-armsl to the ends of the respective l trackways a/d having rollers at their ends operable on said trackways under the spring pressure of said switching elements and being shiftable from one end to the' other of the respective traclrwa s by the shifting of said lever cross-arms om ones'extreme operated position to the other. v i

5. In an electrical'switchof the character described, a body frame comprising opposed end members of material ofelectrical non'- conductivity, said end members having longitudinally opposed trackways on their inner portions, diagonally opposed terminal l Contact members on said end Amembers at the ends'of said trackways, reve'rsely acting, diagonally opposed switching elements operable on said trackways, anda singlev'operating device arranged in'tandem relation with said trackways and said switching elements and being capable of simultaneously actuating said switching elements in opposite directions.

JOHN GURY, Jn.