Safety plug

Electrical connectors – With contact preventer or retractable cover part – Movably mounted

Patent

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Details

439136, H01R 1344

Patent

active

050301195

ABSTRACT:
A safety electrical device, including a housing, a pair of electrical terminals projecting forwardly from said housing for insertion into an electrical receptacle, and a spring biased protective cover mounted on the housing for movement between an extended position enclosed in the forwardly projecting terminals within the cover when the terminals are not inserted in an electrical receptacle and a retracted position which permits the terminals to be inserted into the electrical receptacle. The housing includes a blade holder within which the terminals are fixed and a separate forward housing member secured in forwardly extending fashion to the blade holder. The housing is formed with outwardly extending forward flanges and a stepped outer peripery which facilitates gripping of the device and prevents the hand from slipping off the housing during insertion into and removal from an electrical receptacle. The protective cover has outer substantially uninterrupted surfaces which are adapted for smooth, reliable sliding contact with substantially uninterrupted internal surfaces of the forward housing member. The electrical device may be in the form of a card set plug or an electrical adapter.

REFERENCES:
patent: 2082986 (1937-06-01), Staley
patent: 2396901 (1946-03-01), Tiffany
patent: 2444843 (1948-07-01), Modrey
patent: 3167373 (1965-01-01), Kostich
patent: 3575684 (1971-04-01), McIntyre
patent: 3754205 (1973-08-01), Lenkey
patent: 3839697 (1974-10-01), Obert
patent: 4203640 (1980-05-01), Bice et al.
patent: 4340267 (1982-07-01), Nukaga
patent: 4435032 (1984-03-01), Abramson et al.
patent: 4445739 (1984-05-01), Wooten

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