Multiple shutter digital device

Details Multiple shutter digital device Multiple shutter digital device

1977-10-11

1979-05-08

Pitrelli, John F.

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Alphanumeric device

40437, 58126E, G09F 930

Patent

active

041528530

ABSTRACT:
A multiple shutter device for displaying digital information and including an opaque face plate having a plurality of transparent windows situated thereon, a shutter support plate facing and closely disposed behind the face plate and having a plurality of opaque shutters situated thereon, each shutter in unique alignment with one of the segment windows, a multi-track grooved rotary cam facing and closely disposed behind the shutter support plate, a plurality of cam follower arms each being pivotally attached to one of the shutters at a first end and having a second end provided with a cam track following pin which engages a track on the cam, each arm further having a point intermediate the first and second ends which is pivotally attached to the shutter plate, whereby rotation of the cam causes various combinations of the shutter to be actuated to open and close the segment windows and sequentially display one or more digital characters.

REFERENCES:
patent: 755272 (1904-03-01), Burnham
patent: 3363347 (1968-01-01), Benson
patent: 3399475 (1968-09-01), Rinder
patent: 3683523 (1972-08-01), Boyles
patent: 3721087 (1973-03-01), Boyles et al.
patent: 3825923 (1974-07-01), Pirchl
patent: 3831303 (1974-08-01), Funaki
patent: 3965668 (1976-06-01), Tomokazu et al.
patent: 3990165 (1976-11-01), Vogt
patent: 4021944 (1977-05-01), Trame
patent: 4047314 (1977-09-01), Slack et al.

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