Electricity: circuit makers and breakers – Electric switch details – Indicators
Patent
1978-03-17
1979-07-31
Ross, Herbert F.
Electricity: circuit makers and breakers
Electric switch details
Indicators
200 5A, 200317, H01H 0902
Patent
active
041631382
ABSTRACT:
A flush lighted flat keyboard assembly including a printed circuit board having conductors on one side. Resilient dome switch elements are supported on the one side of the board in spaced-apart relationship in peripheral contact with certain conductors to make center contact with other conductors upon the application of force thereon. Another printed circuit board has one side in facing relationship with the first board and has openings therein respectively in alignment with the switch elements. Light sources are mounted on the other side of the second board which has conductors thereon connected to energize the light sources. A flexible switch-actuating member has one side in facing relationship with the other side of the second board and has switch-actuating projections extending therefrom through the second board openings toward the switch elements. The one side of the actuating member also has isolator projections thereon intermediate the switch-actuating projections, which extend toward the second board. A flexible, flat keyboard member has one side abutting the other side of the actuator member. The actuator member is formed of light-transmissive material and selected areas of the keyboard member are light-transmissive so as to be selectively illuminated by the light sources.
REFERENCES:
patent: RE29440 (1977-10-01), Durkee
patent: 3701869 (1972-10-01), Jacole
patent: 3777222 (1973-12-01), Harris
patent: 3811025 (1974-05-01), Rach
patent: 4056699 (1977-11-01), Jordan
patent: 4060703 (1977-11-01), Everett
patent: 4071718 (1978-01-01), Harden
IBM Technical Disclosure Bulletin, vol. 19, No. 2, Jul. 1976, Tille, "Control Panel, " by Promir & Wilzbach
Bowmar Instrument Corporation
Ross Herbert F.
LandOfFree
Flush lighted flat keyboard assembly does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Flush lighted flat keyboard assembly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Flush lighted flat keyboard assembly will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-23830