Keyless entry systems for use with conventional locksets

Details Keyless entry systems for use with conventional locksets Keyless entry systems for use with conventional locksets

1996-10-11

1999-07-06

Zimmerman, Brian

Communications: electrical

Continuously variable indicating

With meter reading

34082569, 34082572, 70467, 70472, 70224, 70280, H04Q 100

Patent

active

059202688

ABSTRACT:
A keyless entry system for use with conventional locksets is provided. The system employs a battery operated motor and a gear train mounted on the inside of a door. The motor and gear train rotate the inside handle of the lockset in the same manner as a user would rotate the handle to unlatch the door. Misalignments between the gear train and the lockset are accommodated by a pawl which connects the gear train to the connecting shaft between the lockset's inside and outside door handles. The electric motor is activated by a control system responsive to a RF signal generated by a transmitter pendant carried by the user. The RF signal includes a user code, and the control system has a learning mode and an operating mode, with the learning mode serving to record a list of one or more authorized user codes and the operating mode employing that list to determine if the door should be unlatched in response to a particular user code.

REFERENCES:
patent: 4887442 (1989-12-01), Lavelle
patent: 5421178 (1995-06-01), Hamel et al.
patent: 5474348 (1995-12-01), Palmer et al.
patent: 5712626 (1998-01-01), Andreou et al.
patent: 5816086 (1998-10-01), Russell, IV

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