US1325283A

US1325283A - of paris

Info

Publication number: US1325283A
Authority: US
Publication date: 1919-12-16
Anticipated expiration: 1936-12-16

Description

' Patented Dec. 16,1919.

APPLICATION FILED JAN-7.1919.

Inventor.

Mk f flag UNITED STATES PATENT OFFICE.

MAURICE FIGOUR, OF PARIS, FRANCE, ASSIGNOIR, ETABIISSEMENTS CONTINSOUZA,

SOCIETE ANONYME, OF PARIS, FRANCE, A

Specification of Letters Patent.

CORPORATION OF FRANCE;

CINEMATOGRAP HIC APPARATUS.

Patented Dec. 16, 1919.

Application filed January 7, 1919. Serial No. 270,014.

1 it appertains to make and use the same.

The rapidity with which films pass through projecting lanterns, prevents the films from being damaged by the intense heat which is always developed at the luminous focus. If the film is stopped in order to fix on the screen for a certain length of time one picture of the series, the corresponding region of the film is very spoiled by the buckling or warping occasioned by an excessive rise in temperature End it may even happen that the film catches When cinematographic projections are being used for certain purposes, and particularly for exhibitions that are now so common for educational purposes, it is necessary to be able to stop the progress of the film at certain explanation.

The object of the present invention is to enable films to be utilized in this way with as many stoppages as may be desired during exhibition by cooling the stopped film by means of .an air current so as to protect it from any excessive rise in temperature.

pictures calling for detailed By wayof example, reference is made to the accompanylng drawing in which the cinematographic apparatus, seen from the front, is illustrated diagrammatically.

At 1 there is the aperture .through which the pictures are projected on to the screen and behind this aperture the film 2 moves.

On the driving shaft, which is here assumed to be actuated by means of a crank, two oppositely directed

ratchet wheels

4 and 5 are keyed, which gear with two

toothed wheels

6 and 7 loose on the shaft 3. The wheel 6 drives the mechanisms that are usual in cinematographic apparatus and is itself driven by the ratchet 4 when the crank and its shaft rotate in the normal direction of the projection of the band for anlmated photographs that is tosay, clockwise.

The wheel 7, driving by means of the often When theoperator wishes to change fromanimated projection to fixed projection, all that is required is to turn the crank in the opposite direction and at the same speed. An automatic shutter protects the film by hiding the light during any stoppage or excessive slackening of the movement of the crank. This shutter, however, is always objectionable.

When the apparatus is driven by a motor, the fan may be keyed to the shaft of the motor itself or driven by means of any mechanical connection, a suitably placed clutch enabling air to be blown in during the stoppage of the cinematographic apparatus.

The accessory devices can obviously be modified without departing from the principle of the invention, the essential characteristic .of which consists in the combination of the film-driving mechanism-with a fan that acts when stoppage occurs in such a Way as to protect the film against fire for fixed projection.

I claim:

1. lin a cinematographic apparatus, the

gear to the shaft for rotation in one 'direc 1 tion only, a reel actuating gear on the shaft and means for locking said actuating gear to the shaft for movement in the opposite direction only.

In testimony whereof I afiix my signature.

MAURICE FIGOUR.