US1551195A

US1551195A - Knife switch

Info

Publication number: US1551195A
Application number: US6235A
Authority: US
Inventors: George R Hebden
Original assignee: Trumbull Electric Manufacturing Co
Current assignee: Trumbull Electric Manufacturing Co
Priority date: 1925-02-02
Filing date: 1925-02-02
Publication date: 1925-08-25
Anticipated expiration: 1942-08-25

Description

Aug. 251 4 HEBDEN KNIFE SWITCH Filed Feb. 2, 1925 INVENTOR NEY Patented 25 1925. I

GEORGE E. HE BDEN, OF PLAINVILLE,

PATENT nnncrmc MANUFACTURING COMPANY, or rnamv:rnnn, CONNECTICUT, a con,-

romrron or CONNECTICUT.

, xmrn swrrcii.

Application and February 2. .1925. swarm. 6,235.

To all whom it may concern:

Be it known that I, GEORGE R. HEBDEN, a citizen of the United States of America, residing at Plainville, county of Hartford, State ofConnecticut, have invented a new and useful Knife Switch, of which the following is a specification.

Mly invention relates I particularly to switches having one or more swinging bades. x The main object ,is'to provide a post orjaw which can be. made cheaply and to which the circuit wire or'conductor may be directly connected. j

A further specific object is to form a switch front or jaw from a single piece of metal. I have also sought to provide a simple and effective anchorage. i

Fig. 1 is a perspective view of a switch 00 embodying the improvements of my invention.

Fig. 2 is an enlar ed sectional view showing one of the switc jaws or posts attached to a support. A as Fig. 3 is a side view of one of the posts with a conductor wire attached.

Fig. 4 is a from which fo l med. f h t ig. 5 is a perspective view 0 t e -pos partially formed and with a binding screw. The post or jaw is preferably formed of pers tive view of the blank a switch post or jaw may be a sin le strip of metal having a base 6,

arms and 8, with

upright portions

9 and 10, and terminating in'jaws or tip

portions

11 and 12. One of the intermediate portions is preferably rovided with a. tubular member 13 adapt 'to reg ster with the opening 14. The tubular member 13 is interiorly threaded to accommodate the shank of a binding screw 15. This extension 13 may be riveted to more securely hold the two side arms to other. I

\ It should single structure the combinatlon of a supnoted'that the shoulders '16 Y and 17 formed immediately above and below ead of the at I provide in the' porting post or jaw for a knife blade switch together with shoulders positioning the conductor-where it ma" be held in place by a Screw passing direct y into the postwithout the necessityof any additional means, such as are commonly employed'in switch constructions. To facilitate the'mountmg of the switch parts I prefer to strike up from the base of the jaw, an extension 22, which is interiorly threaded to receive. the attaching screw 23, which passes through the insulating base 24. To facilitate locating and retaining the post or jaw in position on the base 24 I may form recesses, such as 25, to receive the base portionsof the posts. The insulating base 24 may be formed of fibre or other compressible material and the recess 25 may be formed by indenting or pressing-in the material of the at. the desired point or P0ints. Y 1

The invention is of course also applicable to the supporting post 26 to which the switch blade 27 is hmged, as well as to the spring jaw member 28 adapted to receive t e switch blade, and in this case I, therefore,-use the terms post and jaw interchangeably to apply to a construction of this character.

In the construction of contact jaw 28, it is preferable to rivet the end ofthe tubular projection 13 in place so as to secure the arms of the jaw together positively but in the construction of the hinge jaw 26, the blade 27 -is secured in position usually by means of a rivet 29 WhlCh also secures the arms of the jaw in position, thus in this later form it is not necessary to rivet the tubular projection 13.

I claim:

1. A one-piece knife bIade sWitch jaw comprising a base, arms extendin therefrom, one of said arms having a pe oration and the other arm having an integral tubular projection extending into and riveted in said perforation and a binding screw threaded into sai projection.

2. A switch blade jaw member comprising abase, arms extending therefrom'and spaced apart at their'outer ends to receive a switch blade, integral means for securing'the intermediate portions of said arms together, and

commc'rrcu'r, assrcnoia 'ro TEE riwmnum.

a bindingscrew passing through said arms 7 at the point where they are secured together, one of said arms having projecting wire-retaining shoulders immediately adjacent the head of said screw.

3. A one-piece knife switch jaw compris ing a base, arms extending from the outer edges thereof and inclined 'toward each other, one ofsaid arms having an opening and the other arm having an integral tubu- 1 'lar projection secured in said opening,'and

a binding screw passing through said projection, the outer ends of said arms being spread apart beyond said screw to receive a switch blade and providing a shoulder im- 15 mediately adjacent the head-0f said screw 7 arms extending from the outer edges thereof a and inclined toward each other, one of said arms having an opening and the other arm having-an integral tubular projection secured in said opening, and a binding'screw passing through said projection, the outer ends of said arms being spaced apart beyond said screw to receive a switch blade, one of said arms having wire-positioning lugs disposed around the edge of the head of said'screw.

' GEORGE R. HEBDEN.