US979050A - Electric switch. - Google Patents

Description

J. A. WARD.

ELECTRIC SWITCH. APPLICATION FILED AUG. 21, 1909.

979,050. Patented Dec. 20, 1910.

I John/\Mfard.

UNITED STATES PAETHENT OFFICE.

JOHN WARD, OF SPOKANE, WASHINGTON.

ELECTRIC SWITCH.

Application To allwkom it may concem:

Be it known that I, JOHN A. WARD, a citizen of the United States, residing at Spokane, in the county of Spokane and State of Washington, have invented certain new and useful Improvements in Electric Switches, of which the followingi's a specification.

This invention relates to improvements in electric switches.

The object of my invention is to provide a switch in which all the live parts are covered, and shielded when. the circuit is closed, preventing any accidental contact therewith. a v i A further object is to provide a switch of a compact form having a novel form of handle and having a peculiar form of base arranged to receive the handle in such a way that while the operation of thedevice is readily tlCCOIl'lPllSllQd, the casual disengage ment or opening of the? switch by moving ob ects striking against the handlels pre vented.

In the drawings, Figure 1 shows a top view of the covered switch. Fig. 2 shows. a top view of the switch with the two part cover removed. Fig. 3 shows an end View of the switch withthe covers removed.

In the accompanying drawings the numeral 1 designates abase. plate of any suitable nonconducting material such as mica, glass. or gutta-percha which near one end is provided with "the grooves 2 which are dis posed in parallel spaced relation, extend for a distance approximately half the length :of the base plate and open through the end these edge of that plate. Held within grooves 2 respecti\-'ely, there are the two outer fuse-carrying posts 4 in the form of sheet metal members bent into a U-shape to receive the fuse plugs 3 as disclosed. Held.

in alinelnent with these outer posts are the inner. posts 5 which are also U'-shaped and which carry the inner ends of the fuse plugs.

Held adjacent to the inner fuse support ing posts 5 are the posts 8 arranged to receive the knives '10, these knife receiving posts being secured byaneans of the screws $1. Suitable electrical conductors 11 extend from the posts 8 to which they are'held by the retaining screws 9 for the posts to the inner ends of respective fuses to which they a e secured by the screws 6. Held in alinementwith the kniie receiving posts 8 which are made of suitable conducting material are I Specification of Letters-Patent.

flled'August 21, 1909. Serial No. 513,991.

being used and held in spaced relation,-being secured by means of thescrews 13. These knife carrying posts 12 each carr Y a pin 14, and these pins ltin turn support the knife blades. made of suitable conducting material which have the reduced ends 15 which are carried through suitable slots within the transversely positioned connecting handle bar 17 which is made of nonconducting material. The lower edge of the non-conducting bar is stopped by the ex tending base portion of each knife receiving post. this bar having a central upwardly extending recessed finger grip 18, by means of whiclrthe switch knives areoperated. The ends 15 ofthe knives are recurved to se curely hold the bar 17 to the knives.

Held to the base plate 1 bymeans ofthecover 21 havingscrew 20, is the shield'or the channels 22,- arranged to contain the up per ends of the inner and outer fuse carryingposts as well as the upper portion of the fuses. This shield 21 is provided with the extending flanges 23 the inner portion of the shield being cut away to providethe oblique portion 25 so as to form an access notch for the insertion of the fingers of an operator.

Held above the knife carrying and receiving posts is a slotted shield or cover 26 held by means of a suitable screw 27, and being further provided with the lengthwise positioned slots28, through which the knife blades 10 strike, when the switch is thrown into operation. This shield 26 also has a .portion: removed as at 25 to make the bar 17 accessible, the extending flanges 30 also assisting in forming a socket, in which the transverse member 17 is held.

The two shields can be readily removed upon the removal of the-screws 20 and 27. The operation of my device is very simple. Whenever it is desired to throw the ,switch into circuit it is'simply necessary to throw the bar 17 downward into contact with the knife receiving posts 8.

The attachment of the switch to a wall or supporting base is eti'ected in any suitable worku'ianlike manner.

The switch is simple and inexpensive in construction and both durable and efficient in operation and the switch may be-operated with positive safety to the operator, as it will be observed that'the hand can not be placed the knifecarrying posts 12,.two such posts 1 tors -'while live the recesses Qjgand 25 Patented Dec. 20, 1910.

in contact with any of the conduc- -lOO LTD

allowing" the bar 17 to be grasped only at a safe distance from the posts 8. If desired the fuse plugs may be eliminated.

It should be noted thatthe tops of the terminal posts 8 are so spaced inwardly of the outer surface of the cover portions of the device that the switch blades 10 will be disengaged therefrom before they are disposed without the protecting covering.

What is claimed is:

The combination with a base member, of terminal members carried thereon, parallel switch blades pivoted thereon, terminal mem-' bers spaced from the first named members and adapted to receive said blades therein an insulating grip bar carried upon the free ends of said switch blades, said bar having a central recessed enlargement adapted for manual engagement to operate the switch, an insulating cover member engaged over said base member and covering said 'first named terminal members and having parallel narrow slots therein adapted to allow close movement of the switch blades therein, and stopping adjacentsaid cross bar, a second cover member disposed oppositely of the cross bar, each of said cover members having extensions meeting at the opposite ends of said cross bar and having opposed finger receiving recesses therein on opposite sides of the cross bar and stopping short of the second named terminal members, said cover members projecting outwardly a spaced distance beyond the outer ends of said second named terminal members, and beyond the central extension of said cross bar to prevent casual engagement and operation of the switch, and to prevent contact of parts of the person with the conducting portions of the switch when closed.

In testimony whereof I atlix my signature, in presence of two witnesses.

JOHN WARD. Witnesses:

FRANK M. Ross, Nn'rrm PAT'IISON.

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