US685507A - Switch for electric circuits. - Google Patents

Description

Patented Oct. 29, mm.

H. P. DAVIS.

SWITCH FUR ELECTRIC CIRCUITS.

(Application filed Nov. 9. 1900.)

(No Model.)

IN VE N TOR WITNESSES J A TTURNEY.

UNITED STATES PATENT OEEIcE.

HARRY P. DAVIS, OF PITTSI URC, PENNSYLVANIA, ASSIGNOR TO THE \VEST- INGHOUSE ELECTRIC & IANUFACTURING COMPANY, A CORPORATION OF PENNSYLVANIA.

SWITCH FOR ELECTRIC CIRCUITS.

SPECIFICATION forming part Of Letters I'atent NO. 685,507, dated October 2 1901 Application filed November 9, 1900. Serial No. 35,996. (No model.)

To aZZ whom, it may concern/.- by the currentcarrying capacity desired.

Be it known that I, HARRY P. DAVIS, a citi- The jaws or sets of jaws 6 and the plate 5 zen of the United States, residing in Pittsare severally mounted upon pillars 8, of porburg, in the county of Allegheny and State celain or other suitable non-conducting ma- 5 of Pennsylvania, have invented a new and terial, which are bolted to the slab 1, and each useful Improvement in Switches for Electric is provided with a tubular extension 0, that Circuits, of which the following is a specitlprojects rearwardly through the base plate cation. or slab 1 a suitable distance to provide the My invention relates to electric apparatus, desired insulation. for the rod that projects 10 and more particularly to devices employed through it and the body portion 8. The

for making and breaking electrical circuits. blades 7 are pivotally mounted at their inner The object of my invention is to provide a ends between plates 10, projecting laterally switch which shall be adapted for use in confrom the plate 5 at its ends, the plates 10 benection with the generation and distribution ing of such length as to permit of mounting 15 of electrical energy and one that at the same the blades at a sufficient distance from the time shall be more simple, inexpensive, and plate 5 to make feasible the turning of the compact in construction than the devices of blades through an angle of approximately this general character heretofore employed. one hundred and eighty degrees, so as to With these ends in view I have devised the bring them when the circuit is open into po- 20 form of switch shown in the accompanying sitions parallel with each other and directly drawings, of whichover the plate 5. The latter plate is also pro- Figure 1 is a view, partially in side elevavided at each end with jaws 11, located in tion and partially in section, of the switch; alinement with a blade '7, pivoted at the other and Fig. 2is a front elevation of the same. end of said plate, so that when the switch is 25 The switch is designed for and intended to opened the free end of the blade will rest in be usedin connection with switchboard-work and beheld in position by the jaw 11. The and the non-conducting base plate or slab 1, plates that form the jaws 11 may of course on which the switch is mounted, will in genbe of such length that the path of movement eral be a switchboard panel. Projecting of the blades 7 is considerably less than one 30 through this base plate or slab 1 are the hundred and eighty degrees; but symmetry switch-terminal studs2, 3, and 4, upon which of structure and economy of space will genbus-bars (not shown) may be mounted. The erally render a throw of approximately one rod 3 is connected at its front end to a plate hundred and eighty degrees both feasible and or block 5, here shown as of conducting matedesirable. The switch-blades 7 are unpro- 35 rial; but, if desired, it might be made of nonvided with handles, but may be opened and conducting material and provided with suitclosed by means of suitable implements emable conducting Wires or strips for completing ployed for that purpose, and when the switch the electric circuits. Each of the rods 2 and is open the blades will extend over the plate 4 is fastened at its front end to switch-jaws 5 and will be securely held in that position,

40 6, which may be of any well-known or suitthe relation between the plate 5 and the blade able construction and are here shown as 7 being much like that existing between the adapted for the reception of the outer ends handle and blades of a pocket-knife. of two blades 7, which are fastened together Where the number and. arrangement of so as to be moved in unison and act as a sinbus-bars and switches make it desirable to pro- 5 gle blade so far as mechanical operation is vide electrical connections between switches concerned. It will be understood that a sinat the front of the board, the rearwardly-progle blade 7 or more than two of such blades jecting terminal studs maybe omitted at such may be employed in lieu of the two shown, points, as will be readily understood. the number of such blades being determined I desire it to be understood that the invention is not limited to a switch having the number of blades shown in the drawings or to the employment of pillars for supporting the switch members, since these devices may be omitted where the energy is of sufliciently low potential to permit of mounting the switch members directly on the slab.

The form of switch constituting my present invention is such that it occupies a minimum amount of space on. a switchboard-panel and insures a maximum degree of separation of cooperating contact-terminals and a compact and safe disposition of the blades when in open-circuit position.

It will be further understood that my invention may be embodied in single pole switches and that it may be otherwise modified within the scope of the claimsfit desired.

I claim as my invention- 1. A switch for electric circuits comprising a base-plate, a middle terminal post having a conducting block or plate, and two terminal posts provided with contact-jaws at opposite sides of the middle post and laterally offset with reference to said middle post and each other, in combination with switch-blades pivotally supported at their inner ends on the middle post, block or plate, the latter being provided with clips or jaws to receive the free ends of the blades when thrown to open-circuit position.

2. In a switch for electric circuits, the combination with a block or plate having jaws at its opposite ends, of blades, the length of which is approximately the same as that of the block or plate, pivotally mounted in said jaws in staggered relation so as to be thrown into engagement with the alined jaws for open-circuit conditions, and terminal posts having jaws with which the free ends of the blades engage in closed position.

In a switch for electric circuits, a conducting block or plate having jaws at its opposite ends and terminal posts having jaws in alinement with corresponding jaws on the block or plate but out of alinement with each other, in combination with blades pivotally mounted at their inner ends in jaws on the block or plate so that their outer ends may be thrown to engage alined jaws on either the terminal posts or the block or plate.

I. A switch for electric circuits, comprising a block or plate, blades hinged to opposite ends of said block or plate out of alinement so as .to be swung into side-by-side position on the block or plate, means for holding the blades in the side-by-side position and stationary contact-terminals in alinement with the blades.

5. A switch for electric circuits comprising a conducting-plate, terminal jaws oppositely disposed with reference to said plate and out of alinement and blades hinged at their inner ends to the opposite ends of the plate so that they may either bridge the spaces between the plate and the terminal jaws or occupy a side-by-side relation on the plate.

6. Aswitch for electric circuits comprising two blades pivotally supported a distance apart approximately equal to their individual length so as to be moved in parallel planes through an angle of approximately one hundred and eighty degrees and stationary contact-terminals respectivelyin alinement with said blades.

7. A switch for electric circuits comprising a plurality of blades, and a support to the opposite ends of which the blades are pivoted in alternation so as to be capable of movement in parallel planes through an angle of approxi mately one hundred and eighty degrees and stationary contact-terminals respectively in alinement with said blades.

8. A switch for electric circuits comprising a plurality of blades, a support to the opposite ends of which the blades are independently pivoted out of alinement and terminal jaws respectively arranged in alinement with the blades that are pivoted to the corresponding ends of the support.

In testimony whereof I have hereunto subscribed my name this 5t-h day of November, 1900.

HARRY P. DAVIS. Witnesses:

WEsLEY G. CARR, BIRNEY IIINns.

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