Card type locking apparatus

Details Card type locking apparatus Card type locking apparatus

1992-05-28

1993-05-25

Gall, Lloyd A.

Locks

Operating mechanism

Key

70387, 70392, 70405, 70DIG25, E05B 2300

Patent

active

052129748

ABSTRACT:
A card type locking apparatus having a chamber enclosed by an upper half and a lower half and having a slidable element, a spring, and four spring plungers in the chamber. When a card plate with raised blocks acting as security codes thereon is inserted into a preset opening provided on the locking apparatus, the raised blocks lift the spring plungers and urge the pin rods mounted on the spring plungers to align horizontally. When the card plate is pressed further the four pin rods enter a window formed on the upper half, which results in the backward movement of the slidable element and the release of the hook, producing the unlocked state.

REFERENCES:
patent: 3552159 (1971-01-01), Craig
patent: 3943737 (1976-03-01), Lerro
patent: 4126025 (1978-11-01), Miyamae
patent: 4338805 (1982-07-01), Nygren
patent: 4754630 (1988-07-01), Kawakami

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