Timelock for bank vault doors and the like

Details Timelock for bank vault doors and the like Timelock for bank vault doors and the like

1975-02-14

1976-04-13

Envall, Jr., R. N.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

70271, 340274C, H01H 4700

Patent

active

039506789

ABSTRACT:
A timelock for bank vault doors and the like is disclosed. The disclosed timelock includes three electronic interval timing devices, each interval timing device including a bank of thumbwheel switches on which the desired minimum interval from the arming of the timelock to the reopening of the bank vault door or the like is retained from day to day unless manually changed. All three of the electronic interval timing devices are started by a switch operated by the timelock arming lever. Each electronic interval timing device includes a numerical display device on which the preset delay interval retained in its bank of thumbwheel switches is displayed. Each electronic interval timing device also includes a numerical display on which the unexpired delay duration is displayed in numerical form whenever that interval timing device is operating. Each electronic interval timing device also includes an output solenoid and means for energizing the output solenoid for a predetermined period (e.g., 15 seconds) commencing when the electronic interval timing device stops operating, having fully counted down. A standby battery system is provided for operating the timelock when line power is unavailable. When the timelock is operating on standby battery power the numerical display of each electronic interval timing device for displaying the unexpired delay duration of that device operates only when a push button on that device is depressed. When anyone of the three solenoids in the timelock is energized, its corresponding electronic interval timing device having counted down to zero, the G-strip of the timelock is so repositioned as to release the arming lever, thus withdrawing the snubber bar from the path of the snubber pin and permitting the bolts of the vault door to be operated into their unlocked position by the associated manual control.

REFERENCES:
patent: 3805246 (1974-04-01), Colucci et al.
patent: 3881171 (1975-04-01), Moorman et al.

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