Signals and indicators – Bells – Gong type
Patent
1975-07-23
1977-08-30
Queisser, Richard C.
Signals and indicators
Bells
Gong type
240 21, 313499, G01D 1128
Patent
active
040447081
ABSTRACT:
A dial display of transilluminated instruments includes a negative or color transparent film of the pointer and dial face of an instrument, in contact with a diffuser element such as a Mylar (polyester) film, the negative film and diffuser being laminated to a high light transmission element such as an acrylic material to provide a rigid concentric pointer drum and dial face assembly, and light emitting diodes and reflector means mounted for back lighting the transparent negative film. Light from the light emitting diodes (LED) is reflected between the reflector assembly and diffuser surface, and produces a uniformly lighted dial and pointer presentation. The color of the pointer and dial face indicia is formed directly by the color of the diffuser material at the exposed areas on the developed negative film. Various other modifications of the invention include use of a reverse silk screened diffuser instead of a negative film, in combination with the diffuser, e.g. a white diffuser, wherein the pointer and dial face displays are reverse silk screened directly on the diffuser, and wherein the white color of the diffuser material forms the display marks or indicia. Further, the diodes can be oriented toward the diffuser surface instead of toward the reflector surface, and different wavelength light emitting diodes can be used. Also there can be employed different colored diffusers or different wavelength filters between the negative and diffuser surfaces.
REFERENCES:
patent: 2009209 (1935-07-01), Scantlebury
patent: 2824954 (1958-02-01), Roper
patent: 2868960 (1959-01-01), Appel et al.
patent: 2886911 (1959-05-01), Hardesty
patent: 3174067 (1965-03-01), Bahrs
patent: 3503365 (1970-03-01), Baez et al.
patent: 3732560 (1973-05-01), Harden et al.
patent: 3821590 (1974-06-01), Kosman et al.
patent: 3867623 (1975-02-01), Widlund
Geldin Max
McDonnell Douglas Corporation
Queisser Richard C.
Yasich Daniel M.
LandOfFree
Transilluminated dial presentation does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Transilluminated dial presentation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transilluminated dial presentation will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-956042