Geometrical instruments
Patent
1974-08-29
1976-02-03
Lake, Roy
Geometrical instruments
339176L, 339180, H01R 1344
Patent
active
039361225
ABSTRACT:
The present invention relates to a safety device in electrical connection devices, especially lamp-holders, comprising a number of contact parts designed to rest against an object arranged to be connected to the connection device, for example a light bulb socket, and a number of elements arranged to be connected to the electric leads of a cable, whereby the contact parts are at a distance from the respective connector elements and are arranged by means of being pushed in by a spring function to achieve contact with these during connection of said object to the device. According to the invention the device is provided with at least one insulating element, forced to be between the contact parts and the respective connector elements and thereby prevent contact between these when said object is removed from the connection device, and simultaneously arranged to be moved by means of the object during its connection to a position in which the contact parts and the respective connector elements are free from the insulating element to be pressed against each other by means of the object by its connection.
REFERENCES:
patent: 2161774 (1939-06-01), Cooke
patent: 2181050 (1939-11-01), Evans
patent: 2688669 (1954-09-01), Quill
patent: 3363215 (1968-01-01), Smith
patent: 3812446 (1974-05-01), Sinclair
Bengt Petersson New Products Investment AB
Bicks Mark S.
Lake Roy
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