US1822727A

US1822727A - Film phonograph

Info

Publication number: US1822727A
Application number: US399830A
Authority: US
Inventors: Valle Guillermo A Del
Original assignee: General Electric Co
Current assignee: General Electric Co
Priority date: 1929-10-15
Filing date: 1929-10-15
Publication date: 1931-09-08
Anticipated expiration: 1948-09-08

Description

P 8, 1931- ca. A. DEL VALLE 1,822,727

FILM PHONOGRAPH Filed Oct. 15, 1929 Inventor'I GuLLLer'mo A. deLVaLLe, b WW HLs Attorney.

Patented Sept. 8, 1931 UNITED STATES- FATE N-r' OFFICE ouILLmo A. max. 'V-A-LLE, or sCImNEC'rADY NEW YORK, 'ASSIGNOR TO GENERAL ELEC- TRIC COMPANY, A CORPORATION QFNEW YORK FILM PHONOGRAPH Application filed October 15,1923 Serial no. 399,836,

My invention relates to a film phonograph and particularly to mechanism forming a" My invention will be better understood from the following description taken in corn nection with the accompanying drawings and its scope willbe pointed out in the appended claims.

Referring to the drawings, Fig. 1 is a combined side view and circuit diagram of a con: struction involving my invention and F 1g.

2 is a perspective view of a portion thereof.

The film 1 which in the operation of the machine unwinds from reel 2 and winds up,

on reel 3 may have a sound record forming a single track or have a plurality of record tracks thereon extending parallel to each other as illustrated at 4 in Fig. 2. The film may be driven at the desired uniform speed by any suitable means-and may be supported at the point at which the record is reproduced by any suitable gate device. In the present embodiment I have shown the film as sup ported and driven by the drum 5 which by the worm wheel 6 and worm 7 is connected to the motor 8. Within the drum 5 is the" photoelectric cell 9 which is suitably connected through amplifying devices in the well known manner to a loud speaker. In the construction shown a narrow light beam is focused upon the film by the optical system indicated at 10, the light modified by the sound record passing on into the cell.

Where the film approaches and leaves the" drum it passes over the rollers 12 and 13 re-j' spectively.

Arranged above that'part of the film ex? tending from the reelv 2 to the roller 12 I have provided the apparatus now to be described for deenergizing the driving motor when the end of the sound track is reached from which reproduction is being made. Frictionally supported in the wall 15, which may form a part of a casing enclosing the apparatus, is the shaft 16 which terminates the initial position in which it illust are a series of in the pointer 1( and knob 18. Rotatably mounted on the shaft 16 is the arcuate contact operating le er 20 having the nut": 21 which engages the screw threads 22 onlish aft 16. Lever 20 also has the contact arm to which is secured the movablecontact 24 which when the lever is rotated bythefilm arranged to connect with the fixed comr des. Coil'spring 26 havingits ends sec ired re spectively to the \Villllfttlilfl lever through the screw cap 2T seryes toreturn theli-ver to ted,

id at a suitable stop, not sliown, being provid that position. (.hi the face of the levee-'20 pins or projections having ounded ends and in the liln'r at' the end of each sound record track is a series of perforations 30 adapted to receive the projections. 29. The lever 20 is so positioned above the film thatit does not beginjto contact'therewith until the film isnearly all unwound at which time the position of the film is represented for example by the dot and dash line; turning the knob l8 on shaft- 16 a quarter turn the levcr2O is moved axially an amount equal to the distance between two adjacent sound tracks, the pointer 1 7 cooperating with the fixed scale marked off i i quarters. Sw tch contacts 245-and 25 close the circuit the relay 33 tlieoperati'on of which opens theniotor circuit at 34.

Su tably means, not shown, are employed for causing registration of the light beam and the particular soundtrack from which reproduction is to be: made and before or during the reproduction the ln ob and. pointer are turned to the-corresponding sound track number; Shortly before the end of the film is reached the projections in the lever 2O begin to touch'the film and when the end of .the track is reached they engage in the openings 30. The continued. movement of the film then rotates thele ver to close the circuit at

contacts

24 and 25 which by the operation of the relay 33 opens the motor circuit at 34. The motor soon comes to restand'beforethe film has been entirely "withdrawn from the reel '2. The film may then be wound back on reel 2 byhand or if desired by reversing the motor.

I have chosen the particular embodiment described above as illustrated of my invention and it will be apparent that various modifications may be made without departing from the spirit and scope of my invention which modifications I aim to cover by the appended claims.

What I claim as new and desire to'secureby Letters Patent of the United Statesis:

1. In a film phonographadaptedtoreceive a roll of film having a{ sound'record track unwound to a predetermined diameter: said film having a plurality of openings therein at the end of each sound track, and means for selectively shifting said member laterally of the film to cause it to be operated by the openings at the end'ofa-ny sound-track.

' In witness whereof; I have hereunto set my I handthis l lthday of October, 1929;

thereon, a member normally spaced from thefilm and arranged to be engaged by said film when the film roll has'been unwound toapredetermined diameter, said film having means at the end of said sound track for'moving' said member in response to its linear movement.

2. In a film honograph adapted to receive a roll of film aving a sound track thereon and actuating means at the end of said track,

a member arranged to be actuated by said means in response to the linear movement of the film being unwound from said roll said member being normally out of engagement with the film and arranged to become engaged with the film when the roll has de-' creased to a predetermined diameter.

3-. In a film phonograph adapted to reproduce-sound from a filin having a plnrality of sound record tracks thereon, a film actuated member having a film engaging portion, said film having an opening adjacent the end of each sound track and means for sele ctively moving said member laterally of the film to be engaged by any one of said openings.

4. In a film phonograph adapted to receive a roll of film having a plurality of sound record tracks thereon, a member arranged to become engaged by said film in'response to thereon arranged tobec'o'me engaged with said film when the roll has been unwound to a predetermined diameter, said film having a plurality of openings therein at the end of each sound track arranged to be engaged by the respective projections, and means for shifting said member laterally of said film to be operated at the end of one or another of sound record tracks.

. 6. In a film phonograph adapted to re- 'ceive a' roll of film having a plurality of sound record tracks thereon, 'a curved circuit controlling member having a plurality of projections thereon arranged to become engaged with the film when the roll has been