Slide transfer and shutter control arrangement for slide project

Details Slide transfer and shutter control arrangement for slide project Slide transfer and shutter control arrangement for slide project

1981-12-31

1984-02-07

Haroian, Harry N.

Optics: image projectors

Shutter

353 92, G03B 2300

Patent

active

044299630

ABSTRACT:
A slide transfer and shutter control arrangement is provided for a slide projector including a simplified shutter control arrangement and a positive acting slide sensor arm that is slidably mounted for shifting translation. Slide transfer is accomplished by a vertically movable lifter arm operated by a level wind screw. The level wind screw also operates a cam actuator. The cam actuator moves up and down with the lifter arm to actuate a slider member. The slider member controls the position of the slide sensor arm and provides shutter latch control. The slide sensor arm retains the shutter in the closed position when no slide is present and the slider member is actuated by the cam actuator to release the shutter latch. When a slide is sensed by the slide sensor arm, the slide sensor arm releases the shutter for projection of the slide at the slide transfer station. Slide face tension is appropriately provided by a face tension arrangement under the control of the cam actuator. A tray lock release arrangement cooperates with operation of the slide transfer and shutter control arrangement.

REFERENCES:
patent: 2960004 (1960-11-01), Jungjohann
patent: 3138062 (1964-06-01), Maiershofer
patent: 3353443 (1967-11-01), Hall
patent: 3411845 (1968-11-01), Pester
patent: 3781103 (1973-12-01), DiPietro
patent: 3876298 (1975-04-01), Hickey
patent: 4118280 (1978-10-01), Charles et al.
patent: 4130353 (1978-12-01), Henkelmann et al.
patent: 4200368 (1980-04-01), Houseknecht

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