Optics: image projectors – Simultaneous projection and manual delineation – Score register
Patent
1977-10-11
1980-01-22
Stephan, Steven L.
Optics: image projectors
Simultaneous projection and manual delineation
Score register
350117, G03B 2156
Patent
active
041847555
ABSTRACT:
An improvement for use in image projection systems of the type which project an image from a substrate where a projector causes the image to be displayed on a receiving member such as a projection screen remote from the projector. One important facet of the improvement resides in the receiving member, i.e., the projection screen. These systems are typically used for displaying scores in bowling games from a projector at the player end to a screen or receiving member at the scoring end. Projectors of this type normally comprise a projector base with a mirror system and a socket which has a light source therein located in relation to the mirror system. The improvement comprises a bracket which is replaceable for the original socket and light source therein. The bracket includes a plate having an improved light socket mounted on the plate. In addition, the bracket includes mounting means having apertures to receive conventional fasteners. These apertures are located in a positional relationship with apertures which received conventional fasteners for mounting the original socket. The improvement light source is capable of being inserted into the improvement socket and contains a filament which is located in relationship to the mirror in a manner similar to the relationship of the filament in the original light source. In addition, the improvement light source does not necessitate the use of an opaque portion which was employed in the original light source, but may utilize a light shield in order to mask direct light. An improved receiving member, e.g. the projection screen, is also utilized in place of the original receiving member. The improved receiving member is uniquely constructed so that it recaptures the projected image with a clarity and brightness which is not otherwise obtainable without the use of expensive beaded screens and the like. The improved light source generates light based on a power output of less than one-half of the power input of the original light source, but enables projection of the image to the improved receiving member with substantially the same degree of brightness.
REFERENCES:
patent: 2004200 (1935-06-01), Goodlin et al.
patent: 3269259 (1966-08-01), Russell
patent: 3653740 (1972-04-01), Ogura et al.
patent: 3795567 (1974-03-01), Hoffman
patent: 3836425 (1974-09-01), Whiting
patent: 3916067 (1975-10-01), Jones et al.
Burgess David E.
Masters Darrell J.
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