Telephone jack lock-out plug

Details Telephone jack lock-out plug Telephone jack lock-out plug

1988-05-16

1989-08-29

Ng, Jin F.

Telephonic communications

Terminal accessory or auxiliary equipment

Locking device

439133, H04M 166

Patent

active

048625000

ABSTRACT:
A lock-out plug is provided for preventing unauthorized use of a telephone by preventing connection thereof to an operative telephone jack. The lock-out plug comprises a compact plug fitting having a size and shape to fit snugly into an open receptacle of a standard modular type telephone outlet jack. An angularly set threaded bore is formed within the plug fitting such that a forward end of the bore is disposed within the telephone receptacle and a rearward end of the bore is exposed to the exterior of the receptacle when the plug fitting is seated therein. A set screw is received within the bore and includes a forward end locking tip for binding engagement with a side wall of the telephone jack to lock the plug fitting in place and thereby prevent unauthorized connection of a telephone to the jack. The head of the set screw is accessible from the exterior of the jack preferably by engagement with a specialized tool to advance or retract the locking tip relative to the jack side wall.

REFERENCES:
patent: 1310138 (1919-07-01), Sargent
patent: 4311883 (1982-01-01), Kidney

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