SU85705A1 - Projection apparatus with automatic movement of slides - Google Patents

Description

The invention relates to projection apparatuses with automatic movement of slides mounted radially on a disc, rotated in front of the lens of the apparatus, using for periodic rotation of the disc a certain angular value of an electromagnet attracting a pawl interacting with a ratchet wheel mounted on the axle of the disc.

Predictive projection devices of this type are usually equipped to periodically turn on and off an electromagnet, by swinging a mercury switch, which makes the device difficult and expensive.

In the proposed apparatus, the simplification of the design of the apparatus and its reduction in price are achieved by the fact that a thermoelectric relay with a heated bimetallic plate is used for iriodic current supply of the electromagnet.

On fpg. 1 shows a diagram of the device, pr 1vod n1, its movement is a disk of the apparatus, front view; in fig. 2 section of the device, side view.

The device consists of an optical system, a light source, a console reinforced and conveniently replaceable rotary disk with slots for transparencies driven by an electromagnet, periodically activated by an automatic thermoelectric relay, or activated by a button inserted into an electrical circuit. Slides / are fixed on the disk 2 against the windows 3 by double-sided clamps 4, after which the disk is mounted on the axis 5n by a console fixed by a nut 6, the disk 2 turns and is produced by an electromagnet 7, whose electrical circuits periodically, at regular intervals, close thermoelectric relays 8 structures with heated bimetallic plate. On the axis 5 of the rotary disk 2 is rigidly fixed. The ram wheel 9, the number of teeth of which corresponds to the number of radialio located frame windows 3 of the rotary

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Editor G. D. Umansky Tech. ed. A. A. Kudr vitska Corr. Vidonova

Sub. to pec. 2 / XI-1960 format boom. 70x108 1/16 Volume 0.34 p. L. Circulation 220. Order 7282Price 50 kopecks .; from 1 / 1-1961 g.-5 cop.

TsBTI under the Committee on Inventions and Discoveries at the USSR Council of Ministers Moscow, Center, M. Cherkassky Lane, 2/6 Gore. Alatyr, printing house number 2 of the Ministry of Culture of the Chuvash ASSR