Incandescent lamp with vibration-protected filament mount

Details Incandescent lamp with vibration-protected filament mount Incandescent lamp with vibration-protected filament mount

1978-02-23

1979-12-25

Chatmon, Jr., Saxfield

Electric lamp and discharge devices

Incandescent lamps

313269, 313278, 313333, H01K 114

Patent

active

041807570

ABSTRACT:
An incandescent lamp has a coiled filament with an improved life when it is mounted substantially in the same direction in which a mechanical shock occurs. In a particular embodiment of a miniature lamp known as a switchboard lamp, the filament is mounted, without further support, between two posts. This results in a greater light effectiveness that permits a current reduction through the filament while maintaining desired light output levels in its operational environment. The filament is protected from harmful shock levels by being mounted between twisted posts which orient the filament in the general direction of a mechanical shock imparted to the lamp through key telephone button releases.

REFERENCES:
patent: 353333 (1886-11-01), Van Depoele
patent: 2315504 (1943-04-01), Curtis
patent: 3007073 (1961-10-01), Swasey
patent: 3375393 (1968-03-01), Morgan

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