Touch-sensitive illuminable door lock

Details Touch-sensitive illuminable door lock Touch-sensitive illuminable door lock

1991-01-02

1993-01-12

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

With signal, indicator, or alarm

Electrically operated switch controlling the signal circuit

340542, 362100, 315129, E05B 1710, H05B 3702

Patent

active

051793253

ABSTRACT:
An illuminating circuit for the key slot in a locking device is made up of a high intensity light source which is mounted on the face plate of the lock in close proximity to the key slot, a piezoelectric crystal is mounted within or adjacent to the lock to respond to vibrations created, for example, by tapping on the face plate to generate an electrical signal, and a control circuit including a timer and battery respond to the electrical signal generated by the crystal to energize a light source for a predetermined time interval after receiving the electrical signal from the crystal.

REFERENCES:
patent: 2831959 (1958-04-01), Jefferson
patent: 3162374 (1964-12-01), Skokut
patent: 4293894 (1981-10-01), Blank
patent: 4360803 (1982-11-01), Heiland
patent: 4475067 (1984-10-01), Rowe
patent: 4760380 (1988-07-01), Quenneville et al.

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