US 936601 A
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Description (OCR text may contain errors)
SWITGH. PPLOATIQNVHLBD 1120.21.1906( Patented 0G11.v 12, 1909.
QINyENToR ATTORNEY' lo.. g3
was man Inc.. umm, Hummm ic.
' of Wilkinsburgfinfthe; county'- of" Allegheny and-@State of'iPennsylvania, have invented al CLARENCE CARsoN, or WiLKiNsBURG, PENNSYLVANIA; Ass'IGNo'n 'ro WESTINGHCUSE" EnECJrEiQ-q, MaNUrACrUnINe CQiaPANx Aconronir'ri'oN OE'PENNSYLVANIA.
Toalligvhmmtt'mayvcoacem: peint-#known "that EI, CLARENCE CARSON, a cltizerifoftli'e'fUnited States, and a resident newfantlfnsefil' Imrovement in Switches,
'of 'which ftlief following risaspecification.l
' invention" relates to devices formal:`
ingfand'fbreakingj electric circuits, and has lspecial reference to switches which are attaehedtothe' freeends' of exible pendent u .and
'Morett 'relatively'sinall machinery, such as fan' moeabiesz Tiefebene-ef m invention is to yprovide a device of the* character 'above indicated that vsliallli ve i'idfjieliable in operation. Bmitlent Witchesl'liave been largely eninne'c'tion with electric lights,
tors', lelect'ri/cal measuring instruments #for testing 'puiposesfand," as heretofore constructeol, switches have usually been breaking the circuit. 'According tdiiiypiesent invention, I provide a switch `adzMipted'for the aforesaid uses Whiohl is fp osit 7e fii'io'peration which provides arelatively lar' Ie air gap between the current-carryingpar s when the switch is opeiilandfivliiclrfis provided with al single operating buttonor other 1neans,- successive operations of which effect the openinf-l zand` sive, rare f, detail views of the structure .shown in Figs'. land2. Figs. 12 and14 are views, similar` 'tof Flgiiffl, @of modified .forms o t switching devices lwhich are included witli-in. the scope of my invention, anclFigs.- 9, 1 0,-` 11 andv .13r 4are t detail @views ofthe strncti'ufe shown Fig.' i12.
vSim'lai" f` parts are the fsitiehilheije illustrated comprises, altube i Specicationiovf Letters Patent. l Appliatin met December 27, 190e. *serial No. 349,709;
]e s iinple'-''and` compact in construction.
fopen-y v ei'id o vtl .movement-bwwpim@ Si P Aiacrosstheetttloeffionearone end and engages- 5 0 1 which forms the casingfof the .device and` longitudinalslots 19 in the opposite sides of 100 Patented oet.y 1e,' 1eoo one end of .whichispartially closed, Jan 'in-l sulating-ilbiishin'g .2, an A#insulating 'block 3,
stantionary springt-contacts Land 5,-:1 rotatable bridging -contact `f nen'iberf Wand'- means for fmoving the bridging contactmember into and tout of engagement-'ywithfl the spring contacts. fl-hebody offftheinsulating biishing 2 is'tte'dii'ito vtheftul'ie1- andv a projec tion therefrom extendsV tliroughfanopenf" ing 8in the partially closed' end vofthe tube.
The insulatingjbloclr whichis, general, f of '.a l cylindricalF forimfni'ay be ,secured Vin Y' position 'by -a'set soretv34 y'and is provided 'Y with longitudinal slots 9 through which the, 'spring contacts 4 and' 5 extend, "and-a' silb- `sta`ntially rectangular end projection 10 to. 'which these contact members are attached.
'by screws `llfor by other suitable means. The vslotfst) are sufficient-1y deep and the projection 10 suficientlynarrow to` materially separate the Contact members Land 5 from the interior walls of the inclosing tube 1,.
which may be of .conducting material. A shaft 12 is rotatablyA 'mounted'1niol-waybev tween the free ends of the contactine-mbers" 4 and 5,'its centerline beingv perpendicular to and iii-jther plane of the axsof the tube.
The bridging Contact Vmember (5 is substantially elliptical inform and is rigidly atthis member from a position of engagement with thespring contacts 4 and 5,' out of Contact therewith, so that material air gaps exist betweenftlieispringcontacts and the plates I3 Yivlii ed, l-Wit between thezstoplSand the closed end of the inner' tube andnormally separates the tubes'as far asthe stop will permit. ,A spring pawl 21. is attached tothe closed end of the inner tube 17 and lprojects inwardly therefrom so that a relatively slight inward -movement of the tube 17 will cause a 90 y movement of the bridging contact member 6` byreason of the engagement of the 'innerl end ofthe spring pawl with the. ratchet 16. In" this way, successive actuationsiof the inner tube 17, in opposition vto the spring 20, will open and close the switch. The yiiexible conducting leads may be brought in through a hole 22 in the bushing 7 and the electrical connection ,may be made tothe contacts 4 and 5 by means of screws 2 3. -The tube 1 is provided with an insulating lining adjacent to the point of connection with the leads so that the possibility of short-circuitingthe switch is reduced to a minimum.
eferring particularly to Figs. 9, 10 11, 12 and 13 of the drawings, an insulating block 24, which is substituted for the block 3 of, Fig. 1, is adapted to support two in stead of one pair of spring contact members 25 and 26 in order to interrupt both sides of the circuit when the switch is open, said members. being held in engagement with each other, when V,the switch is closed, by meansf a block l27 of insulating material which is substituted for the bridging contact member Shown in Fig. 1'.' Figs. 9, 10 and 11 are detail views of the insulating block 24, and Fig. 13`is a detail View of: on'e of the contact members 25. The opera-y tion of the modified structure is similar to that of Fig. 1 and will be readily understood from the foregoing description.
Referring especially to Fig. 14, a tube 28,-
helical spring 32 is interposed between the walls of the vtubes 1 and 28 and is held in position by the flanges 30 and 31. A; spring pawl 33, which corresponds to the pawl `21 of Fig. 1, is adapted to effect the rotation of the bridging contact member y6 by engagement with the teeth of the ratchet disk 1G when an outward pull is exerted upon the tubeA 28. In order that the moving parts maybe disclosed for inspection, the enlargement 29 of the tube 28 is preferably composed of two separable parts, one of whichI forms an end cap 34 to which the spring edwithout departing from thespirit of my invention. I
I 'claim as my mvention:
1. In a pendent switchforelectric circuits, the combination with a tube partially closed yat oneend, an insulating block seated in and supported by the partially closed end, a second tube movably fitted into the open end of the first 'tube and having longitudinal slots, a cross pin supported by the iirst tube and projecting through said longitudinal slots, a springvwhich tends to separate the tubes, a pair'of spring contact lingers attached to theinsulating block, a `shaft rotatably mounted between thefngers, and a. bridging Contact member and an insulating ratchet disk. 4attached 'j to the "shaft, of a spring pawl extending inwardly from the outer end of the inner tube and adapted to engage the ratchet disk.
2. 1n a pendent switch for electric circuits,
the combination with a tube partially closed f at one end, an insulating block seated in and supported byy the partially closed end,`a second tube movably itted into lthe open end of 'the lfirst tubeand having lo itudinal slots, a crosp pin supported by the first tube and projecting through said longitudinal slots, a spring which tends' to separate the tubes, a pair of s ring contact fingers attached to the insu ating block, a shaft rotatably mounted between the fingers, and a bridging contact member and an insulating ratchet disk attached to the shaft, of a.
spring pawl extending inwardly from the outer end ofthe inner tube and adapted to engage the ratchet disk, and means for accentuatingthe quadrature positions of the bridging contact member.
3. In a pendent switch for electric circuits, the combination with a tube partially closed at one end, an insulatin block seated in and su orted by the parta ly closed end, a seco tube movably fitted into the open end of the first tube and having a 'slot and pin connection with the first tube, a spring which tends to separate the tubes, a pair of spring contact fingers attached to the insulating block, a shaft rotatably mounted between the fingers, and a bridging contact member and a ratchet disk attached to the'shaft, of a spring pawl extending inwardly from the outer end of the inner tube and adapted to engage the 'ratchet disk. 4
supported by the partia ly closed end, a second tube mpvably fitted into the open .end of the first tube and having a slot-and pin 12o 4. In a pendent switch for electric circuits, the combination with a tube partially closed at one end, an insulatin block seated in and connection with the first tube, a Sprin which l centliating the quadrature positions of the 10 tends to separate the tubes, a. sur o spring Lbridging Contact member. Contact fingers attached to t e insulating In testimony whereof, I have hereunto block, a shaft rotatably mounted between 5 subscribed my name this 21st day of Decemthe fingers, and a bridging contact member ber, 1906.
und n, ratchet disk attached to the shaft, of i CLARENCE CARSON. a spring pawl extending inwardly 'from the Witnesses: enter end of the inner tube and adapted to `O'r'ro S. Sonruunxa engage ilieratchet disk, and means for ac-` Bumm' I-IlNEs.