Phosphorescent keyhole locator

Details Phosphorescent keyhole locator Phosphorescent keyhole locator

1988-08-29

1990-04-03

Husar, Stephen F.

Illumination

Door knob or keyhole illuminator

362 84, 70455, 2504661, E05B 1710

Patent

active

049145541

ABSTRACT:
A phosphorescent keyhole locator particularly adapted for use in combination with a tumbler-type lock comprising a cylindrical tumbler having a circular tumbler end surface with a keyhole therein, and a peripheral end surface around the tumbler end surface. A solid phosphorescent plastic body having an aperture therethrough is adhesively attached to the peripheral end surface with the aperture positioned over the tumbler end surface. The aperture is at least about as large as the tumbler end surface and has straight sides which may be normal to or bevelled towards the tumbler end surface.

REFERENCES:
patent: 1243518 (1917-10-01), Harvey
patent: 2617290 (1952-11-01), Schwartz
patent: 2658151 (1953-11-01), Heinz
patent: 2729749 (1956-01-01), Heinz
patent: 3307030 (1967-02-01), DeFrancisco
patent: 4425600 (1984-01-01), Barnhart
patent: 4539625 (1985-09-01), Bornstein et al.
patent: 4600974 (1986-07-01), Lew et al.

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