US903705A - Rotary snap-switch. - Google Patents

Description

MKM

G. W.GOODRIDGE & G; B. THOMAS.

ROTARY SNAP SWITCH.

APPLICATION HLBD @11.3, 1908.

903,705. Patented lvm/.10,1908

ATTORNEYS UNITED srACrEsA PATENT OFFICE.

GILBERT W. GOODRIDGE AND GEORGE B. THOMAS, OF BRIDGEPORT, CONNEOTICUT,'

ASSIGNORS TO THE PERKINS ELECTRIC SWITCH MANUFACTURINGv COMPANY, 0F BRIDGEBORT, CONNECTICUT, AI CORPORATION 'OF CONNECTICUT.

ROTARY SNAP-salmon, I

lSpecification of VLetters Patent. i

Application filed January 3, 1908. .Serial N o; 409,202.

To all whom 'it may concern:

Be it known'that we, GILBERT W. GOOD RIDGE and GEORGE B. THOMAS, both citizens of the United States of America, and residents of Bridgeport; in the county of Faireld, inthe State .of Connecticut, have in- .of the spindle to be moved longitudinally of the latter-when the latter is turned against the strain of a spring and to be thereby lifted clear of the engaging teeth of the ratchet fixed on the base.

Our invention has been designed with the view of simplifying and improving the construction of the operative parts of the switch, and particularly the rotary switch member. In the accompany drawings Figure l is a perspective View, illustrating the several component parts of the rotary ,switch member; Fig. 2 is a vertical section on theline 2 2, Fig. 3; and Fig. 3 is a section on the line 8 3, Fig. 2.

Referring to Figs. 2 and?) A is the porcelain or other insulating base carrying the usual Contact posts, not shown, and the fixed4 ratchet plate a, while B 'is the central spindle turning in a bearing in the base and pro'- vided at .the opposite end with a suitable handle or button C, (partially4 shown),v by which it may be turned. This spindle has coiled around it a spiral spring S, one end of which is connected to the spindle at 8,Fig. 2, while the outer end bears upon an arm on the rotary switch piece R, (Fig. 3).

The spindle has a screw thread cut on Itit at s1, and onthis isa nut N with a leg n passing freely through a hole inl the rotary switch to engage the teeth Of-the ratchet plate on the base, and to be raised ear of the ra chet teeth by the rotationjof tite spindle, wliere- .piece R, Fig. 2, and adapted at its lowexl'fend Patented Nov? io,1eos.

upon the -tensioned spring will cause the f switch piece R to take the next position with a snap. A

The construction of the .rotary switch piece will bebest understood by reference to Fig. 1. This piece is builtup. of sheet metal stampings and 'insulation sheets secured together by means of an `eyelet or hollow rivet 5, through which the spindle l B passes. There isa central switch contact blade, which may be of any well known type and made of one or more leaves or plates. In the present instance it is shown as a one-piece plate 6 with upturned contact ends 7, 7 to make and break contact with thisplate is an opening lled with a sheet 8 of paper or other suitable insulating material, and then around the whole of the central part of the plate 6 is folded orI the stationary contacts on thebase, and in wrapped an insulating sheet- 9. Under the plate thus enveloped is placed a flanged plate 10, and over it a plate 11 and the several plates and sheets being formed. with suitable openings as shown for the passage vof the leg n of the nut N and also for' the reception of the eyelet 5, the latter is inserted and riveted over, (F ig.. 2), to firmly clamp these sheets yand plates together in such a way that the central contact-carrying switch plate 6' willl be insulated by the described 'sheets from the-top and bottom plates and from the eyelet and therefore' from the spindle B. v

The upper insulated part 11 is shown as provided with upwardly extending arms 12 l having prongs 13to be passed through openings in and to be clamped down on the indicating dial 14, Fig. 3.- .This dial does not need to be insulated from the arms 12 because the plate 11 is'ne'ver' in the electrical circuit.

We claim as our invention 1. A rotary switch piece for a snap switch, consisting of a central blade with Contact ends punched to receive an insulating central piece, insulation enveloping the central plate, top and bottom plates, and means for securing these parts together.

2. A rotary switch piece for a snap switch, consisting of a centralblade with Contact ends punchedto receive an insulatlng center piece, msulation enveloping the central plate,

vtop and bottom plates and an eyelet riveting the parts together and Constituting a beati 3. A rotar switch, consisting of a central blade' with Contact ends,

ng fior the operating spindle. y s Witch piece for a sna top and bottom plates and intermediate insulating sheets5 the insulated top plate having arms and an indicating dial clamped thereon.

In testimony-whereof we have signed our 10 narines to this specification, 1n the presence of two subscriblng Wltnesses.

GILBERT W. GOODRIDGE. GEORGE B. THOMAS. Witnesses:

F. E. SEELEY,

C. D. PLATT.

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