US 841844 A
Description (OCR text may contain errors)
PATENTED JAN. 22, 1907.
J. BBRNET'. KEY OPERATED LOGK ING SWITCH.
I APILIUATION FILED FEB-10. 1906.
W11: EEEEE UNITED STATES PATENT OFFICE.
JOHN BERNET, OF CHICAGO, ILLINOIS,
KEY- OPERATED LOCKING-SWITCH.
Specification of Letters Patent.
Patented Jan. 22, 1907;
Application filed February 10,1905. Serial No. 245,117.
To all whom it may concern:
Be itknown that I, JOHN BERNET, a citizenof the United States, and a resident of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Key Operated Locking- Switches and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had tothe accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.
Heretofore automobile vehicles of most kinds have been provided with electrical I" '5 switches either for opening or closing the circuit in electrical vehicles or for opening and closing the spark-circuit for other types. These switches have usually been of a type such that the removal of a simple cylindric switch-plug is sufficient to break the circuit. Inasmuch as any conducting substance of proper size may be inserted in the switch, it
i the contacts or the switch-plug being slightly fss worn or a little greasy or slightly oxidized, the switch is unsatisfactory and frequently insufficient for the ignition of the charge, and in many instances considerable delay is accasioned while operators seek for defects in other parts of the mechanism, though the switch only is at fault.
The object of this invention is to afiord av switch of such 'aconstruction as to afford in every instance a broad and perfect contact and which is at all times positively protected and locked from unauthorized interference.
It is also an object of the invention to afford a construction in whichan individual lock is provided for each and every switch,.
whereby any two switches, though identical in all other respects, can only be brought into position to complete the circuit by the use of a key appropriate for that look only, thereby preventing unauthorized interference.
It is also an object of the invention to afford a construction of such simple, compact, and
durable nature as to require no attention whatever on the part of the user other than 'to turn the key and by the use of which shortcircuiting sible.
The invention consists in the matters here'- inafter described, and more fully pointed out and defined in the appended claims.
In the drawings, Figure 1 is a front elevation of a device embodying my invention. Fig. 2 is a section of the same, taken on line 2 2 of Fig. 1, showing the key in place. Fig. .3 is a rear elevation thereof.- Fig. 4 is an enand imperfect contact are imposlarged transverse section of one of the contacts and the knife-bar. fragmentary section illustrating the connection between the revolving tumbler of the lock and the switch-bar. Fig. 6 is an enlarged fragmentary detail of the revoluble element carrying the knife-bar.
Fig. 5 is an enlarged As shown in the drawings, A indicates a tablet of vulcanite, slate, mica, indurated fiber, or any suitable insulating material and, as shown, rectangular in form and having a central a erture therethrough, as shown in Fig. 2. aidinsulating plate or tablet A is secured in a metallic or any other suitable casing B, also rectangular in form at its base and fitting thereto and comprising connected side and end walls integral with a flat top portion b, from which, as shown, an integral conical shell extends outwardly and is provided with a circular or other suitable aperture in its end adapted to receive the lock.
Said lock may be of any preferred construction, but as shown comprises a cylindric body portion C, adapted to fit in said conical tumbler is positioned in,register with the aperture through the insulating-tablet A and is provided with a key-aperture, as isusual, and with any suitable arrangement of wards necessitatin the use of its special key for rotating the barrel or tumbler. As shown, said wards comprise cylindric pins 0 to 0 inclusive, which are seated transversel in the barrel and of a length to be brought ush with the circumference thereof when the key is in place, as shown in Fig. 2, and which, as shown, register with correspondin springpressed pins 0 to 0 inclusive, in t e cylindric body portion, which when the key is removed project into the correspondin apertures in the barrel, locking in the usua manner the same from movement. As shown, said tablet A'is rigidly secured within said casing against the inwardly-directed shoul- 9. shell, in which is a revoluble tumbler or bari I ing in a suitable recess in the flange d. Parallel ribs d are provided on each side the center on the inner end of said hub, between which and axially of said hub opens a rectangular slot (shown in Fig. 2 and in dotted ines in Fig. 6) in which engages the inner end of a rigid plate E, of metal or any suitable material, the other end of which positively engages in a suitable axial slot in the inner end of the tumbler or barrel and is secured thereto by means of a plate e, provided with a tongue e, which projects through a slot or aperture in said bar E. Said plate e projects peripherally beyond the tumbler and bears against the body of the look, thereby holding tle tumbler in place in the lock.
Rigidly secured at the inner end of said hub d by means of the ribs (1 which project from the center of the same, is a doubleended knife-bar F, adapted to engage at its ends the spring-contacts f f arranged oppositely and in pairs and connected with suitable conductors to afford the current whereby the circuit from either of two sets of bat teries or other sources of current-supply may be completed. The contacts, as shown, are spring-plates of any suitableconducting material rlgidly secured on the inner side of said tablet A and which at their extremity adj acent the ends of the knife-bar are reverted upon themselves toafford a loop in which said knife-bar firmly engages, as shown in Figs. 2 and 4. As shown, the extremity of each spring-contact is bent downwardly to afiord a free tongue adapted to be liftedby the knife-bar in entering or leaving the contact and tending to prevent the bar moving out of contact from vibration when in use and insuring a satisfactory contact under all conditions.
The operation is as follows: Owing to the construction described, the switch can be turned either to make or break. circuit by the use of its individual key C, which alone is adapted to operate the lock. As shown, the lock is so positioned and adjusted in the casing and with respect to the switch that the barrel or tumbler is locked only when the circuit is broken, so that when the key is removed. from the lock it is impossible to close the circuit by any other means. When the proper key is inserted, the barrel or tumbler can be readily rotated, carrying therewith the knifebar into engagement with either of said pairs of contacts. The switch is rigidly secured to the dash b or other point of support by the bolts 6 the threaded ends being riveted While I have described the switch as a- I locking-switch adapted for use in vehicles, it is obvious that the same may be used in connection with circuit-breakers or other related devices and that any desired lock construction may be used. I therefore do not purpose limiting this application for patent otherwise than necessitated by the prior art, as obviously many details of construction and operation may be varied without departingfrom the principles of this invention.
I claim as my invention 1. In an electrical switch comprising a plurality of sets of oppositely disposed clamping contact points, a key operated transverse bar adapted to be clamped at its ends in said oppositelydisposed contact points, a laterally-projecting plate rigidly engaged to said transverse bar, a cylindric sleeve and a centrally-apertured cylindric hub therein adapted to receive said plate therethrough.
2. In a switch the combination with a lock, of a transverse bar rigidly engaged on the inner end of the locking-bolt and oppositely-disposed contact-plates adapted to engage the ends of said bar.
3. In an electrical switch the combination with a lock, having a rotary locking-bolt therein of a transverse bar on the inner end of said bolt and contact-plates having hooked ends adapted to engage over the ends of said bar.
4. An electrical switch comprising a casing, a sheet of insulating material rigidly fastened therein and having a central aperture therethrough, oppositely-disposed airs of contact-points rigidly engaged to sald sheet of insulating material, a sleeve engaged to said insulator and having its bore in alinement with the aperture therein, a cylindric hub in said sleeve, a switch-bar rigidly engaged to the bottom of said hub and adapted to engage the oppositely-disposed contactpoints and means for rotating the bar.
5. In a device of the class described a casing having an aperture in the top thereof, a fixed cylindric body therein, a rotatable bolt in said cylindric body, an insulator rigidly engaged to said cylindric body and having an aperture therethrough in alinement with the rotatable bolt, a sleeve rigidly engaged to said insulator, a slotted cylindric hub rotatable in said sleeve, a downwardly-projecting plate rigidly engaged to said bolt and projecting through the slot in said hub, a bar rigidly engaged on said hub and oppositely-disposed below said bolt and having an aperture in alinement therewith, a sleeve rigidly engaged to said insulator and a rotatable hub therein having an aperture therethrough adapted to receive said plate.
7. In a device of the class described the combination with a casing .of an apertured insulator dividingthe same, a locking-bolt on one side of said insulator and registering with the aperture in said insulator, a sleeve rigidly engaged-on said insulator opposite from said bolt, a rotative hub therein, means rigidly connecting said hub with said. bolt, a transverse bar rigidly engaged on said hub and a plurality of resilient contacts arranged in oppositelydisposed pairs and having their outer ends bent to retain the ends of the bar therein against vibration.
8. The combination in an electrical switch of a lock therefor, a transverse contact-bar on said lock and. oppositely-disposed spring clampin plates adapted to engage the ends of said ar and form an electrical contact therewith.
9. In a device of the class described the combination with a casing of a transverse switch-bar therein, a key-o erated bolt en gaged to said. bar, an insu ator rigidly engaged to said casing, oppositely-disposed contacts fastened to said insulator and each contact having a resilient loop on its upper end adapted to hold the switch-bar therein a transverse knife-bar and oppositely-disposed hooked contacts therein, a key-operated lock carried. on the knife-bar and adapted to hold the same normally out of engagement with the contacts and an individual key for said lock whereby the knife-bar may be thrown into engagement with the contacts.
11. An electric switch embracing a closed metallic casing insulated oppositely-disposed hooked contacts therein, a transverse switchbar adapted for engagement in said contacts, a lock set in the casing and comprising a fixed body and a rotatable bolt, a plate rigidly en aging the bolt and switch-bar whereby the olt must be operated to operate the switch and means for holding said switchbar in operative position.
12. The combination with a closed casing, of an insulating-tablet therein, a plurality of pairs of contact-platcs on one side of said tablet, a transverse knife-bar adapted to engage said contact-plates in pairs, a lock set in said casing on the sideof said tablet opposite from the contacts, a revoluble element therein positively connected with the knifebar and acting to control the adjustment thereof and an individual key for said lock. 13. In a lock in switch, the combination with a casing, of a central look therein, a knife-bar connected therewith centrally and rotated thereby, sprin -contacts disposed in pairs around the knifear and adapted to be engaged by its ends and means for attaching the switch adapted to prevent unauthorized removal. 7
In testimony whereof I have hereunto subscribed my name in the presence of two subscribing witnesses.
C. W. HILLS, W. W. WITHENBURY