Twist-on/twist-off flashlight with shock-mounted bulb assembly a

Details Twist-on/twist-off flashlight with shock-mounted bulb assembly a Twist-on/twist-off flashlight with shock-mounted bulb assembly a

1992-07-21

1994-05-03

Yeung, James C.

Illumination

Self powered lamp

Cylindrical flashlight casing

362203, 362188, F21L 700

Patent

active

053093372

ABSTRACT:
Two, redundant, electrical switches in electrical series between a flashlight's battery and its bulb are simultaneously activated by an angular rotation between two sections of the flashlight's case. To implement one of the switches the functions of (i) force biasing and (ii) electrical conduction between a battery's terminal and the flashlight case are separated. Force biasing between battery and case transpires by a spring and washer which are, in combination, electrically non-conducting. Electrical conduction between battery and case transpires by another, separate, spring that is shorter than the force-biasing spring. Further, and independently, a removable and replaceable combination shock-mounted light bulb and reflector assembly includes (i) a wire-lead miniature light bulb of low inertial mass encapsulated within (ii) a shock-absorbing plastic matrix which is further sleeved in (iii) a strong metal which also presents a reflector surface precision aligned to the bulb. The entire assembly is easy to handle and exhibits superior (i) mechanical alignment, strength, and damage resistance, and (ii) electrical connectivity, when placed and replaced within a flashlight of complimentary construction.

REFERENCES:
patent: 1487983 (1924-03-01), Stiriss
patent: 4581686 (1986-04-01), Nelson
patent: 4888670 (1989-12-01), Sharrah
patent: 4899265 (1990-02-01), Maglica
patent: 5121308 (1992-06-01), Maglica et al.

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