Flat key with circuit chip

Details Flat key with circuit chip Flat key with circuit chip

1993-03-08

1994-05-17

Gall, Lloyd A.

Locks

Operating mechanism

Key

70278, 70460, 235492, 34082531, E05B 1904

Patent

active

053117573

ABSTRACT:
A flat key for or a lock which is coded mechanically as well as electronically, includes a flat basic shaped part (11) consisting of metal, with a shank section (9) and a bow section (13). A circuit chip (23), fitted with structural parts (25) of an electronic circuit, is in a recess (21) in the bow section, formed by an integral bottom (19) of the basic shaped part (11) and sealed by a casting compound (29). Housing shells (15, 17) surrounding the bow section (13) are on facing flat sides of the bow section (13). The housing shell (15) lying over the recess (21) is bonded to the bow section (13). The other housing shell (17) bears a U-shaped rib (43) by which it engages behind the bonded housing shell (15).

REFERENCES:
patent: 312545 (1885-02-01), Zeilin
patent: 2653492 (1953-09-01), Abrams
patent: 4077242 (1978-03-01), Sedley
patent: 4102166 (1978-07-01), Hughes
patent: 4686358 (1987-08-01), Seckinger et al.
patent: 4734693 (1988-03-01), Dluhosch et al.
patent: 4888970 (1989-12-01), Kinzler et al.
patent: 4922736 (1990-05-01), Tanaka et al.
patent: 4924686 (1990-05-01), Vonlanthen
patent: 5038590 (1991-08-01), Sawyer et al.
patent: 5208450 (1993-05-01), Uenishi et al.

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