US1003391A - Electric snap-switch. - Google Patents

Description

R.'J. BARBER u V.`DURBIN.

ELECTRIGSNAP SWITCH.

APPLICATION FILED Nov.1s, 1909.

1,003,391. Pannted sept 12 [911 529-4 /////////,/l /fe zazifzessea fn u en 1071;.

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UNITED STATES PATENT oEEIoE.

RAYMOND J. BARBER, OF BELMONT, AND VERNON DREI, OF EROOKLINE, MASSA- CHUSETTS, ASSIGNORS To GLOBE EAR-PHONE oOMPANY', OF BOSTON, MASSACH- sETTs,A CORPORATION OE MASSACHUSETTS.

ELECTRIC SNAP-SWITCH.

Specification of Letters Iatent. Patented Sept. I2, 1911. Application filed November 18, 1909.

Serial N0. 528,733.'

To all whom 'it may concern:

Be it known that we, RAYMOND J. BARBER and VERNON DURBIN, citizens of the United. States, and residents, respectively,-of B elmont, inthe county of Middlesex, Stateof Massachusetts, and of Brookline, in the county of Norfolk, State of Massachusetts, have invented an Improvement in Electric Snap-Switches, of which the following dcscription, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts. Our invention, while adapted for general use, is primarily intendedfor use in situations requiring an exceedingly small device, as on an ear-phone cord, a surgical lamp, and the like.

To this end our invention comprises two relatively movable parts, one of which is arl ranged to rock with relation to the other, and provided respectively with the comple-l mental parts of any convenient snap switchders perfectly practicable.

Figure l showing the rocking bar in side elevation; Fig. 2 being asectional view of the complemental member; Fig. 3 being a sideelevation of the parts together; Fig. 4 being a central horizontal sectional view of the complemental or base member; Fig. 5 a similar view showing a different winding, and Fig. 6 a cross sectional view, line 5 5 of Fig. 5.

As above stated, one principal advantage of our invention is its practicability for eX- ceedingly small sizes, our invention rendering it entirelypracticable to construct the .device much smaller than shown in the drawings. The base block or relatively stationary member 1, in the preferred construction of the drawings, comprises a shell or body 2 of insulating material or any con# venient substance, having one or more openings 3, 4 in its ends for the passage Of the circuit wires, and pivotJ holes 5 in its oppoSite sides 6 for the rocking member, and containing one part 7 of the make-and-break device, which preferably operates subst-an'- tially the same as ain ordinary glove fastener or ball and socket joint, and may accordingly consist of any of such well known devices, being herein Shown as secured rigidly 4 in position by a screw Sand provided with Spring circuit-closing jaws 9, 10. At the opposite endof the member 1 is a Similar device 12, only one of these, however, being Ordinarily actually used in the electric circuit, the other being provided merely as a holding device, for the better-operation of the switch. A rocking bar v13 coperaties with the relatively stationary member 1 and is herein shown as comprising a shell 14 formed as a protecting hood adapted to fit down over the shell 2, the two shells being otherwise similar excepting that the shell 14 has its opposite ends raised sufficiently to Apermit of its having the required rockin movement. A pivot rodor rivet 15 joins the two shells permanently together, bein surrounded by an insulation bushing l on which is mounted a relatively stationary conductor bushing or covering 17, to which lmay be soldered or otherwise secured one of the. circuit wires 18, the other circuit wire 19 bein-g shown as simply passing through the switch, in at one opening 4 and out at the other 3 (when used, for instance, on the wires of an ear-phone). A conductor wire 2O connects from the conductor sleeve 17 to the adjacent complementary member 21 of the active make-and-break device, said member 21 being rigidly secured` to' depend from the under side of the rocking bar 13. A

similar dummy device 22 is Similarly proA vided at the opposite end of said rock-ing memberto cooperate with the member 12. A circuit wire 2R is connected to the lower member 7 of thev active make-and-break de vice to continue the clrcuit onward 1n conpass directly through the switch as shown in tage of affording a practical construction Fig. 4, a corresponding wire 24 is secured vdirectly to the member' 7 -of the makefandbreak device, the rocking member 13 ofthe switch being arranged the same as shown in Fig. 1.

Enom the above description, it will be obvious to those skilled in the art that the switch may be made Iin practically any size desired, even down t0 a very small size, and

yet ibe perfectly safe, operative and practi.

cal. l

In use, if the switch is closed, so that the cooperating members 21 and 7 are interengaged as shown in Figs. 5 and 6, the right hand end of the member 13 will then he in upwardly tilted position as shown in Fig. 3, whereupon the operator, to open the switch, simply presses the right hand ends together,

notches 25 in the lower edge of the shell or inclosing part 14 being provided to straddle the wires so as to permit of the desired rocking movement. The resistance o'ered by the interlocked switch parts 9, 10, 21 causes the releasing movement to be sudden, after the well known manner of snap switches, and the parts 12, 22 then snap together in similar manner to hold the switch open. When it is desired to close the switch, the operator grasps the then. separated left hand ends of the switch, and

presses them together, the members' 12, 22(

offering the same resistance to this closing movement that the members 9,' 10, 21 offered to. the opening movement, the result being that the closing is sudden to the same extent and for thel same reason that the opening was sudden.

As already intimated, our invention is not restricted to the precise constructional details herein shown. Besides the advanfor extremely small sizes of switch as w'ell as larger sizes, our constructionhas the further advantage of\being exceedingly simple and inexpensive to manufacture and almost indestructible in use.l The easing, com.

' posed of the stationary and 'rocking memzbers 1, 13`may be cheaply stamped out or molded, while, as already stated, the makel:so

claim as new and Patent 1s,

and-break members 7, 21, 12and 22 may be,

if desired,'simply usual glove fasteners. l

Having described our invention, what we desire to secure byLetters 1. A switch, comprising twolongitudinal members pivoted together intermediate their ends for relative rocking movement, pairs of spring snap fasteners having the elements thereof carried by said members at opposite sides and remote from the pivot, said fasteners being mutually coperative and constructed' to quicken the latter part of both the engaging and disengaging movementi', and one of said fasteners having its elements constituting the terminals of a make-and-break mechanism.

2. A switch, comprising two longitudinally extendingniembers pivoted together intermediate their lengthI for relative rocking movement, a rounded knob cai'ried by ene of said members, remote from the pivot point and constituting one electric terminal, and a'retaining spring member constructed to eo-act with said knob to yieldingly hold the. parts engaged and to quicken the disengaging movement, said spring constituting the other electric terminal.

3. A. switch, comprising two longitudinal members pivoted together for `relative rocking movement, said two members being provided with eoiiiplemeiitary poi-tions of a combination snap fastener and make-and break mechanism, one of said members being formed as a hood havinga depending portion tted over the other member to protect the same and the wo-rking parts.

4. A switch, comprising two longitudinal members pivoted together intermediate their ends for relative rocking movement, said two members being provided with complementa'ry portions of a 'combination snap fastener and make and break mechanism,

'one of said'members being formed as a hood adapted to fit over the other member to pro- -tect the parts, said hood having its edges

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