Communications: electrical – Continuously variable indicating – With meter reading
Patent
1987-11-30
1988-09-27
Yusko, Donald J.
Communications: electrical
Continuously variable indicating
With meter reading
70272, 70284, 361172, 340825560, E05B 4900, H04Q 900
Patent
active
047745126
ABSTRACT:
In this arrangement the lock may be operated only if a bolt is withdrawn. Such bolt is driven by a motor controlled by a micro-processor associated with a memory in which time slots for removal of the ban on lock operation are stored. These time slots are constantly compared with the time of day by the micro-processor which removes the ban by controlling the motor only if the time of day is within a time slot. Blocking intervals having precedence over the time slots may intervene so as to prevent removal of the ban during such intervals. A keyboard following checking of an authorizing code permits eventual modification of the time slots and the blocking intervals. The arrangement finds use for safes and other protected enclosures.
REFERENCES:
patent: 3881171 (1975-04-01), Moorman et al.
patent: 4218690 (1980-08-01), Ulch et al.
patent: 4293915 (1981-10-01), Carpenter et al.
patent: 4472789 (1984-09-01), Sibley
patent: 4567557 (1986-01-01), Burns
patent: 4634846 (1987-01-01), Harvey et al.
patent: 4644484 (1987-02-01), Flynn et al.
Flektor, vol. 9, No. 4, Apr. 1983, pp. 4.42-4.50, Canterbury, Kent, GB; "7-Day Timer/Controller".
Jolidon Francois
Richard Willy
Relhor S.A.
Yusko Donald J.
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