Projectable timer

Details Projectable timer Projectable timer

1993-03-30

1997-01-07

Dowling, William C.

Optics: image projectors

Miscellaneous

353DIG3, 434394, G09B 1900

Patent

active

055909442

ABSTRACT:
An electronic timing device has a transparent liquid crystal display for use on an overhead projector, for projecting a large image of the LCD numerals on a screen or wall of a classroom, for timing of tests or other activities. The timer has a plastic casing, various function keys, a solar cell and/or battery, other internal electronics and a transparent liquid crystal display. Foldable legs of the timer, when open, maintain the timer a set distance above the light stage of the projector so as to prevent the LCD from overheating. One of the foldable legs, in the closed position, serves as protection and as a reflective backing for the LCD, so that the timer can function as a desk top LCD clock in the closed position. The timing device can function as a clock or timer in various modes.

REFERENCES:
patent: 4149257 (1979-04-01), Nakagiri et al.
patent: 4836786 (1989-06-01), Wong
patent: 5035502 (1991-07-01), Stokes
patent: 5168294 (1992-12-01), Davis et al.

Affiliated with

Also associated with

Rating

Projectable timer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Projectable timer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Projectable timer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1759373