US2027680A

US2027680A - Projecting machine for sound cinematographs

Info

Publication number: US2027680A
Application number: US757060A
Authority: US
Inventors: Debrie Andre Leon Vict Clement
Original assignee: Individual
Current assignee: Individual
Priority date: 1934-12-11
Filing date: 1934-12-11
Publication date: 1936-01-14
Anticipated expiration: 1953-01-14

Description

Jan. 14, 1936..

A. L. V. C. DEBRIE PROJECTING MACHINE FOR SOUND CINEMATOGRAPHS Filed Dec. 11, 1934 3 Sheets-Sheet l Jan. 14, 1936. A. L.. v. c. DEERE 2,027,680

PROJECTING MACHINE FOR SOUND CINEMATOGRAPHS Filed Dec. 11, 1954 3 Sheets-Sheet 2 I MM, 14 MM Jan. 14, 1936. A. 1.. vc. 'DEBRIE 2,027,680

PROJECTING MACHINE FOR SOUND CINEMATOGRAPHS 3 Sheets-Sheet 3 Filed Dec. 11, 1934 Patented Jan. 14, 1936 PATENT OFFICE PBOIECTING MACHINE FOB SOUND CINEMATOGB-APHS Andre Leon vim: Clement Debris, Paris, France Application December 11, 1934, SeflalNo. 15am 7 Claims. (01. sa-iaz) My invention has for its object a cinematographic machine adapted to perform easily the projection oi? sound films. It is characterized by the fact that it comprises a general frame or cas- 5 ing forming a lantern for the projection lamp and containing no mechanism. In or on this casing a plurality of units is adapted to be secured, each of these units serving a particular purpose and forming respectively a film driving and pro- 10 iecting mechanism, a motor with a fan, a sound reader, a projecting lamp with current leads, a sound amplifier. This arrangement allows a speedy and separate mounting and dismantling of the diflerent elements first for amembly as 15 one of the above units, then for fixation on the central casing or for preliminary adjustment. moreover different detail features are provided for ensuring a very simple connection for the parts one with another and with the casing.

20 In accompanying drawings shown by way of example:

Fig. Us a general side view showing the differ-- ent units ready for mounting on the central casins.

25 Fig. 2 is a general partly sectional side view of the machine ready for operation with the dififerent units mounted on the casing,

Fig. 3 is a plan view of the machine with the upper covers removed.

.80 Fig. 4 is a front view partly sectional oi the object glass mounting.

Fig. 5 is a side view partly sectional oi the same mounting.

Fig. 6 shows a detail oi said mounting.

85 Fig. 7 is a detail showing of the film guideway and projection gate.

The projecting machine comprises chiefly a hollow casing i oi sheet or cast metal on or in vwhichare scorned (Fig. l) a block or \mit A com- 40 prising-the film driving and projecting mechanism, a unit B comprising the motor with its fan, a unit C constituted by the projection lamp, 9. unit 1) constituted by the sound reader and a unit E forming a base and including the sound 45 amplifier. l The unit A adapted to be secured to the'iront of the casing i comprises a, support 2 carrying the ahait 3 'c .e shutter 4 to the inside which is secured it errcittent filmdrirmig mechanism shown 42- annnaticallv at B and to 6 the outside oi which are secured arms ti t, eel lapsible in the example shown canying the film ieed and up reels b -"3'. The film 8 (Fig. 2) winds on one reel another through the channelled guideway 9 and over the drums to In, It. As apparent in Fig. i. the guideway s does not bear against the support 2 and a wide gap l l is provided between the support and the guideway A throughout the height of the latter for ensuring the cooling of the film between the mechanism carrying support 2 and the casing 1 under the action of the fresh air flowing in'the direction shown in the drawings. In the usual manner, a presser i2 ensures the rigidity of the film in front of the projection gate I2.

The mechanism carrying support carries also 10 the projecting system comprising the objectglass-carrier ll mounted on the plate and the condenser 16. A knob ll holds the object-glass in its carrier.

The shaft 3 carries at its inner end a hollow 15 pulley it which enters, when the machine is assemblecl, the inside of the casing I together with the shutter ii. 1

The second unit B secured to the opposite side of the casing i enters almost entirely into the 0 latter and is constituted by the motor IS, the shaft of which carries at its front end a friction roller while its rear end carries a suction fan 2| of the type described in my copending application Ser. No. 751,074 filed on Nov. 1, 1934 an electric contact 22 is provided at the lower part of the motor 101' feeding the latter. A perforated cap 23 closes the aperture through which the motor has been introduced into the casing l.

The mounting; of the motor is eifected in the following manner: the motor is carried by the alined horizontal pivots 242-44, the contacts 22 resting on the cooperating contacts 225 (Fig.

3) carried by a spring blade 28. The roller 2a is engaged inside the hollow pulley l8 (Fig. 2) and the spring 26 urging upwardly the rear part of the motor ensures an intimate contact between this roller and the inside oi the rim of the pulley, which ensures the driving oi the mechanism. The

disconnection is obtained by means of a screw 21 adapted tomake the motor pivot against the action of the spring 22.

The unit C comprises chiefly a cover 28 provided with elongated apertures 28 for the admission of iresh air. This cover may be secured to the upper part of the casing i and carries on one hand the contact blade to on the other hand the pin 8! leading current to the protection lamp 22 the position oi which whenthe machine is lies hehindtiie shutter t (Fig. 2). This 5t lamp arranged with its cap up rds is connected with the current leads on one hand through the spring made It and the pin 3! ensu a socket 22 and on the other hand through a contact ring 34 contacting with another socket not shown. 66

The two sockets are carried through an insulating plate 35 on which the lamp also rests. It is thus apparent that the lamp-carrying plate 35 is removable and may be replaced when the lamp is changed. On the other hand when the cover is lifted for instance for removing the lamp, the circuit feeding the latter is broken owing to the fact that the pin 38 integral with the cover 28 is then separated from the socket 33 integral with the lamp-carrier 35.

Lastly the described arrangement of the lamp 32 allows its use not only for projection purposes in cooperation with a mirror 35 carried by the casing behind the projection gate, but also for illuminating the photoelectric cell of the sound reader described hereinafter.

The unit D forming the sound reader is constituted by a plate 37 adapted to bear against an aperture in one of the side Walls of the easing l for which it forms a cover. This plate carries the casing of the photoelectric cell 38 provided with pins 59, 393' together with the tube 50 enclosing the cooperating optic system, a presser shoe M ensuring the rigidity of the film and regulating means arranged coaxially with the pulley :32. This sound reader forms the subjectmatter of my copending application Ser. No. 757,059, filed on Dec. 11, 1934. As apparent from Fig. 2 the optic tube 435 is arranged so as to receive in the assembled machine the light rays from the projecting lamp 82.

The last unit E forms a support for the whole apparatus. It is constituted, as described in my copending application Ser. No. 751,075, filed on Nov. 1, 1934, by a preliminary cell amplifier comprising the following elements: a base plate 53, a casing as enclosing the electric system, transformer, condenser, etc. a lamp 55, sockets 55, 46' adapted to receive the pins 35, 39' of the photoelectric cell of the sound reader and sockets til adapted to receive pins i8 secured to the main casing l and feeding the motor i9 and the lamp 32 which avoids all wire connections between the diiferent units.

The general current terminals are shown at 49 and a knob 58 carried by the front panel 5i of the casing 46 controls the general switch (Fig. 2). This same panel carries the

knobs

52 and 53 controlling respectively the tone control and the potentiometer, the sound cutout 5t and a signalling lamp 55. The casing 45 may thus be placed on the machine without any connection being required, openings being merely provided for the passage of current terminals, pins, adjustment means andthe like.

In order to gisure steadiness for the projector and to direct atwill'the light beam when required, the base plate 43 is carried by supporting screws 56 mounted at the angles of the cover, these screws being adjustable in height by means of an outwardly milled nut 57 held between two rubber washers '55, 58', they are guided each by a screw 59 engaging a slot 60 in the screw 55 and ending with rubber shoes 6| projecting beyond the lower end of the base plate 43 and extending inside the supporting screws so as to damp the vibrations of the latter.

I will now complete the description of the casing I by mentioning that it shows at its upper end elongated apertures 62 in its front and lateral walls for ensuring the suction of fresh air and that stops 63 are provided on the front wall was to form passages l l for fresh air between the film driving means 2 and the casing I as described hereinabove. Lastly on one of the sidewalls an inspection door or plate 84 (Fig. 3) allows an easy access to the inside of the casing.

Figs. 5, 6 and 7 show constructional details of the projecting machine briefly described hereinbefore.

The plate i5 carrying the object-glass-carrier Id is hingedly secured to the mechanism support 2 through the hinges 65 (Figs. 3 and 4). Its bolting is ensured by the tube 66 secured in the object-glass carrier I 6 and containing a spring 67 urging out the ball 68 prevented by a narrowing in of the outer end of the tube from passing out of same. This ball is adapted to engage a notch 59 provided in the projection ill on the support 2.

For focusing the object-glass, it is necessary to vary the position thereof with reference to the object-glass carrier. To this end, the object-glass is housed in a socket ii (Fig. 5) in which is provided a helical groove l2. On the other hand, the object-glass-carrier it carries at its lower end (Figs. 4 and 5) a bearing is enclos= ing a ball 75 urged by a spring '85 and closed by a screw it. This ball engages the groove 72 and serves thus as a guiding stud for the object-glass socket ii. For locking said socket after the glass is focussed, there is screwed longitudinally of the bearing a tapped knob ll whichpresses the bearing the upper end of which is incurved against the socket it which is thus locked. To avoid any useless unscrewing of the knob ll, this knob carries a projection it moving in a recess 18 (Fig. 6) at the lower part of the tubular projection 89 of the object-glass carrier ii whereby the rotation of the blob ii is limited.

What I claim is:

1. A projecting machine for sound films comprising a casing, an apertured hollow support adapted to be removably fitted to the outside of a lateral wall of the casing, a film-driving and carrying mechanism inside said hollow support, arms pivotally secured to the hollow support and carrying the film feed and take-up reels an electric motor adapted to be removably fitted in the opposite lateral wall of the casing, a shaft for said motor adapted to frictionally engage the film driving mechanism, a picture projecting and sound record illuminating lamp, a support removably carrying said lamp on its underside and adapted to removably close the upper part of the casing, a sound reader including a photoelectric cell adapted to be removably fitted in the casingunderneath the motor with the cell lying in vertical alinement with the location of the lamp, a base to which the lower part of the casing is removably secured, a sound current amplifier in the base, means for feeding current to the base and electric leads and contact means for electrically connecting the lamp, cell, amplifier and motor with the current feeding means.

2. A projecting machine for sound films comprising a casing, a hollow support and a filmdriving and carrying mechanism carried thereby adapted to be removably fitted in a wall of the casing, said mechanism including, a rotary drive shaft and a cylindrically recessed part at the end thereof, an electric motor adaptedto be removably carried by the casing and including a shaft adapted when the motor is in place to lie parallel to the mechanism drive shaft, a friction roller carried by the motor shaft and engaging the recess in the cylindrically recessed part for driving same, a picture projecting and sound record il- 1 I:

luminating lamp, a support removably carrying said lamp and removably carried by the casing, a sound reader including a photoelectric cell removably carried by the casing, a base for removably can-ying the casing, a sound current amplifier in the base, means for feeding current to the base and electric leads and contact means for electrically connecting the lamp, cell, amplifier and motor with the current feeding means.

3. A projecting machine for sound films comprising a casing, a hollow support and a filmdriving and carrying mechanism carried thereby adapted to be removably fitted in a wall of the casing, said mechanism including a rotary drive shaft and a cylindrically recessed part at the end thereof, an electric motor adapted to be removably introduced in the casing and including a shaft adapted when the motor is in place to lie parallel to the mechanism drive shaft, a friction roller carried by the motor shaft, a friction roller carried by the motor shaft and engaging the recess in the cylindrically recessed part for driving same, a pivot rigid with the casing for rockably holding the motor, a spring carried by the casing adapted to urge the motor in a direction such that the friction roller bears against the annularly recessed part, a screw carried by the casing for adjustably counteracting the action of the spring, a picture projecting and sound record illuminating lamp, a support removably carrying said lamp and removably carried by the casing, a sound reader including a photoelectric cell removably carried by the casing, a base for removably carrying the easing, a sound current amplifier in the base, means for feeding current to the base and electric leads and contact means for electrically connecting the lamp, cell, amplifier and motor with the current feeding means.

4. A projecting machine for sound films comprising an apertured casing, a hollow support and a film driving and carrying mechanism including a shutter carried thereby, said support being removably fitted in an aperture of the casing, an

electric motor adapted to be removably set in placethroughanapertureofthecasingandto frictionally control the film driving mechanism, a perforated cap adapted to close the casing aperture through which the motor is adapted to pass,

a picture projecting and sound record illuminating lamp, a perforated cover adapted to removably close the upper aperture in the casing and removably carrying said lamp behind the shutter,

electric leads and contact means on the cover, a

lamp carrier plate, contact means on said plate adapted to cooperate with the contact means on the cover, a sound reader including a photoelectric cell removably carried in an aperture of the casing, a base for removably carrying the casing, a sound current amplifier in the base, means for feeding current to the base and electric leads and contact means for electrically connecting the cell, motor, amplifier and contact means in the cover with the electric current feeding means.

5. In a machine as claimed in claim 1, the provision of longitudinally grooved screws carrying the base, nuts controlling same, transverse screws engaging the grooves in the carrying screws, and yielding shoes at the end of the transverse screws engaging the said grooves and projecting beyond the carrying screws.

6. In a machine as claimed in claim 1, a plate hingedly secured to the hollow mechanism-carrying support, a spring-urged ball system adapted to lock said plate against the support, an object glass, and a carrier therefor carried by the plate.

fl. In a machine as claimed in claim 1, a plate hingedly secured to the hollow mechanism-carrying support, a spring-urged ball system adapted to lock said plate against the support, an object glass, a helically slotted socket therefor, a socket system on the carrier engaging the helical slot and a knob adapted to move between predetermined limits for holding the socket in place.

ANDRE LEON vrc'ron 01mm DEBBIE.

carrier carried by the plate, a spring-urged ball