US 604874 A
Description (OCR text may contain errors)
1 (No Modem! l, l 1 1 R. T. D. BROUGH, & W.' ERsB-Y.
` n AFETYDEYIGE F0 EGTRIC A IA v 4.. Patented 31, 1898. 179; t, y
.,UNITED* STATES PATENT OFFICE.'
y REGINALD THOMAS ;DUDLEY BROUGHAM AND WALTER CHARLES BERSEY, c 'OF LONDON, ENGLAND, ASSIGNORS TO THEELECTRICAL VEHICLE SYN- DIOATE, LIMITED, OF SAME'PLACE. y
SAFETY DEVICE FOR' i-:LcTRle eARR|AcEs.
SPECIFICATION forming part of Letters Patent N0. 604,874, dated May 31, 1898. Application nea December 13, 1897. sentir. 651,726. (roman.)
To all whoml it may concern:
Beit known that we, REGINALD THOMAS -DUDLE'Y BROUGHAM, residing at 22 Dorset street, Portman Square, and WALTER` 5 CHARLES; BERSEY, residing at 28A Victoria street, lVestlninster, London, in the county of Middlesex, England, subjects of the Queen of Great Britain, have inventedacertain new and useful Safety Device vfor Electric 'Carro riages, of which the following is a specification.
The Object ofthis invention is to prevent unauthorized persons from starting electricallypropelled carriages when left by the driver.
15 Forthis purpose a plug or key bOX with two open contacts inside is interposed between v one pole of the battery and the switch controlling thfe motor.` A plpg or key of special design (which may be vaiied. so that each key zo will only it its own box) is provided to convnect the two contacts inside. lVh'en the driver leaves the carriage, he removes the plug or key and takes it -With hiin. Vhile this plug or key is. out it is impossible to start the moz 5 v tor'or move the carriage. Y
Figure l is a Vertical section, and Fig. 2 a plan, of 'the'box. Fig. -3 isf-a side elevation, and Fig. .4 an end elevation, of the key. The wire from one pole of. the battery is 3o connected by the ,binding-screw o' to the springplate a and the wire from the other pole by the screw b to the spring-plate b.
The key c is passed through the hole d in the top of the box, being guided by the plate e, and when its flange c' comes into contact with 3 5 the plate d' on the top of the box it is turned, the projection c2 at its end, entering between t-he plates d and b, coming into the position shown in dotted lines in Fig. 2. The circuit vis then closed through the plate a, projection 4o c2, and the plate Z).
. What We claim is- 1. The combination of a closed box, a keyhole leading into the box, two Open contacts .within the box remote from the keyhole and 45 connected to the circuit-wires and a key so shaped thatiit passes through the keyhole and when Jthe-,key is turned connects the coutaets.
2. The combination of a closed box, a keyo leading into the box, two open contacts Within the box remote from the keyhole and connected to the circuit-wires, a key so shaped that/it passes through the keyhole an aprojection on the key adapted to enter b tween 55 the contacts.
REGTNALD THOMAS DUDLEY Moneum WALTER CHARLES BERSEY. Witnesses: i
FRANK HOWELL HAvs, ROBERT B, RAnsnonD.`