Control systems for microfilm readers

Details Control systems for microfilm readers Control systems for microfilm readers

1980-10-29

1982-07-13

Stephan, Steven L.

Optics: image projectors

Selective data retrieval

Plural picture rows on single microcard

355 45, G03B 2748, G03B 2308

Patent

active

043391826

ABSTRACT:
A microfilm reader comprising a plurality of input keys for specifying the desired frame of a microfilm, drive assemblies for automatically transporting the microfilm in response to signals from input keys to bring the specified frame to the projecting position, and a control system. Upon the application of power to the control system or change of the magnification of projection, a signal output circuit emits signals equivalent to those produced when specific input keys are depressed, to transport the microfilm automatically to a predetermined position and bring a specified frame to the projecting position without striking any input key.

REFERENCES:
patent: 3792440 (1974-02-01), Murakoshi
patent: 3841747 (1974-10-01), Peroutky
patent: 3870413 (1975-03-01), Goebel
patent: 4033684 (1977-07-01), Toriumi et al.
patent: 4086469 (1978-04-01), Toriumi et al.
patent: 4172657 (1979-10-01), Watanabe et al.
patent: 4283136 (1981-08-01), Swift et al.

Affiliated with

Also associated with

Rating

Control systems for microfilm readers does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-201885