US2281726A

US2281726A - Intermittent feed device

Info

Publication number: US2281726A
Application number: US295479A
Authority: US
Inventors: Stechbart Bruno
Original assignee: Bell and Howell Co
Current assignee: Bell and Howell Co
Priority date: 1939-09-18
Filing date: 1939-09-18
Publication date: 1942-05-05
Anticipated expiration: 1959-05-05

Description

y 1942- B. STECHBART 2,281,726

INTERMITTENT FEED DEVICE Filed Sept. 18, 1959 2 Sheets-Sheet} 'l 2 9 /Z5rzz/20 5/66/5560/ a J 4 m (xi-) y 5, 1 .B. STECHBART 2,281,726

INTERMITTENT FEED DEVICE Filed Sept. 18, 1959 2 Sheets-Sheet 2 I I i- F '01 I 23 2/ )2 5 'l 7/ motion picture projecting machine with moved and embodying my invention;

Patented May 5, 1942 INTERLHTTENT FEED DEVICE Bruno Stechbart, Chicago, 111., minor to m 7 Bell a Howell Company, Chicago, 111., a corporation of lllinois Application September is, 1939, Serial No. 295,479

6 Claims.

My invention relates particularly to intermittent feed devices such as are used on motion picture machines although not limited to this use alone.

The general object of the invention resides in the provision of a simple, effective and accurate intermittent feed device which is particularly adapted for use in motion picture machines, the invention contemplating economy in manufacture and provision for assembly and service adjustment of the mechanism.

With this object in view my invention consists in certain features of novelty in the construction, combination and arrangement of parts by which the said objects and certain other objects, hereinafter appearing, are eflected, all as fully described with reference to the accompanying drawing and more particularly pointed out in the appended claims.

In the said drawings- Figure 1 is a partial view in front elevation of parts re- Flgure ,2 is a partial sectional view substantially on the line 2-2 of Figure 1;

Figure 3 is a partial sectional view substantially on the line 3-3 of Figure 1;

'Figure 4 'is a partial sectional view substantially on the line 4-4 of Figure 1;

Figure 5 is an enlarged partial sectional view substantially on the line 8-5 of Figure 7; c

Figure 6 is an enlarged partial sectional view substantially on the. line H of Figure "I; and

Figure 7 is a view similar to Figure 1 showing parts in different positions from those in which they are shown in Figure l. Referring to the drawings, I designates a ver-- tically disposed frame part, and a vertically extending apertured front face guide member 2 of a film feed guide is secured against a rear face of the frame part I. See Figures 1, 2 and 5.

A vertically disposed carrier 3, laterally spaced from the guide member 2, is mounted on the frame I in the following manner: Headed thimbles 4 pass through vertically spaced bores I in the frame part and through vertically spaced and extending slots 6 and I through the carrier member, and headed screws 8 are screwthreaded into the thimbles. The upper thimble slidably engages the upper slot 6 and a flanged eccentric bushing 9 is rotatably engaged on the lower thimble and slidably engages the lower slot 1, this bushing being clamped in angularly adjusted position against the frame part by the lower the head of the upper screw 8 and'the carrier 3 and another spring washer I2 is engaged between the flange of the bushing 9 and the carrier 3 to frictionally position the carrier.

The carrier 3 is thus vertically adjustable and is also adjustable laterally by angular adjustment of the eccentric bushing 9.

A vertically disposed headed screw I3 is screwthreaded downwardly through the upper wall of screw I. A spring washer II is engaged between the frame part I, and the lower end of this screw. is provided with a circumferential groove I4 which is engaged in an undercut slot ii at the upper end of the carrier 3. Accordingly, manual rotation of the screw I 3 by means of the head thereof, which is disposed exterior of the frame part I, efiects vertical adjustment of the carrier. v

A pair of vertically alined and spaced bearing studs I! are secured, as designated at IT, on the frame part I adjacent the face guide 2. and a vertically disposed toothed feedshuttle I8 is provided with horizontally disposed and apertured upper and lower ends I9 which are slidably and pivotally engaged on the bearing studs I6, so that the shuttle is mounted for horizontal pivotal movement and for vertical reciprocating movement along its pivotal axis. See Figures 1, 6 and 7. 7

The shuttle II is provided with a laterally extending arm II having a rearwardly projecting toothed end 22 which projects through a vertical slot 23 through the guide member 2 for engagement with perforations 24 in a film 25 at the rear surface of the guide member 2 for the feeding of the film, oscillation of the shuttle on its pivotal axis effecting toothed engagement and disengagement of the shuttle with the filmand reciprocation of the shuttle along its pivotal axis effecting film feed and return movement of the shuttle.

An actuating member or plate 28 is pivotally mounted at one end, as designated at 21, on the intermediate portion of the carrier 3 on a horizontal rearwardly and forwardly extending axis,

. whereby this actuating member is mounted for oscillation vertically corresponding with vertical reciprocating movement ofthe shuttle I8.

See Figures 1, 3, 5 and 7. The actuating member 26 extends laterally toward the shuttle l8, and-the other end of the actuating member is operatively connected with the shuttle I8 to vertically reciprocate the same in the following manner:

The shuttle I I is provided with vertically spaced parallel flanges 2t forming a bearing slot extending transversely of the pivotal axis of the shuttle. See Figures 1, 5, 6 and 7. The said other end of the actuating member is provided with a rearwardly extending pivot stud 29 on which a slide bearing block 3| is pivotally mounted. This bearing block is slidably engaged between the flanges 28 to form a slot or slide bearing engagement between th portion of the shut tle l8, intermediate the bearings thereof, and said other end of the actuating member 2lii and extending transversely of the pivotal axis of the shuttle, whereby the shuttle is reciprocated yerti-' cally by oscillation of the actuating member, the slot bearing accommodating differences of movement between the actuating member and shuttle transversely of the pivotal axis of the shuttle.

A forwardly and rearwardly extending drive shaft 32 is rotatably mounted on the frame part I between the ends of theactuating member 26 and is disposed in a horizontal plane intermediate the ends of the carrier 3 and the shuttle l8.

Cams

33 and 34 are secured on the shaft 32, the cam 33 being a radial cam and the cam 34 being a grooved axial cam disposed immediately to the rear of the cam 33. v

The intermediate portion of the actuating member 26 is apertured, as designated at 35, and

r the shaft 32 extends therethrough. The actuating member 26 is provided with vertically spaced parallel laterally extending bearing flanges 35 at the aperture 35, and the cam 33 engages between these fianges to oscillate the actuating member with rotation of the shaft 32 to effect vertical reciprocation of the shuttle l8 by means of the aforesaid slot bearing.

The portion of the shuttle I8 intermediate the bearings thereof is provided with a vertically extending cam follower' portion 31 which is engaged in the groove of the cam 34 to oscillate the shuttle on its pivotal axis with rotation of the shaft 32. The

cams

33 and 34 are so timed that the shuttle I8 is vertically reciprocated and oscillated on its pivotal axis to effect intermittent feed of the film 25. A usual rotary light shutter 38 is secured on the shaft 32 to operate in timed relation with the intermittent feed of the film.

Vertical adjustment of the carrier 3 by means of the screw l3 effects vertical adjustment of the pivotal axis of the actuating member 25 for the purpose of framing, and adjustment of the eccentric bushing 9 effects lateral adjustment of the carrier 3 and with it the pivotal axis of the actuating member to vary the extent of the throw of the actuating member and the extent of the reciprocating movement of the shuttle. This latter adjustment is for the purpose of adjusting the feed and return movement of the shuttle to conform with the spacing of the feed perforations of the film.

While I have thus described my invention, I

tle and actuating member adapted to accommodate diflerences of movement therebetween transversely of reciprocating movement of said do not wish to be limited to the precise details described as changes may be readily made without departing from the spirit of my invention, but having thus described my invention I claim as new and desire to secure by Letters Patent the following: i

1. In an intermittent feed device the combination with a feed shuttle mounted for reciprocating movement, of an actuating member mounted for pivotal movement corresponding with reciprocating movement of said shuttle, rotatory means for oscillating said actuating member, an operative connection between said shut-.

shuttle, and means for adjusting the pivotal axis of said actuating member in the plane of movement thereof and transversely of reciprocating movement of said shuttle.

2. In an intermittent feed device the combination with a feed shuttle mounted for reciprocating movement, of an actuating member mounted at one end for pivotal movement corresponding with reciprocating movement of said shutsaid shuttle.

3. In an intermittent feed device the combination with a feed shuttle mounted for reciprocating movement, of an actuating member mounted at one end for pivotal movement corresponding with reciprocating movement of said shuttle, rotatory means operative on said actuating member intermediate the ends thereof for oscillating the same, a slot bearing connection between said shuttle and the other end of said actuating member and extending transversely of reciprocating movement of said shuttle, means for adjustin the pivotal axis of said actuating member longitudinally of reciprocating movement of said shuttle, and a second means for adjusting the pivotal axis of said actuating member in the plane of movement thereof and transversely of the reciprocating movement of said shuttle.

4. In an intermittent feed device the combination with a toothed feed shuttle mounted for pivotal movement and for reciprocating movement along its pivotal axis, of an actuating member mounted for pivotal movement corresponding with reciprocating movement of said shuttle, an operative connection between said shuttle and actuating member adapted to accommodate difierences of movement therebetween transversely of the pivotal axis of said shuttle, rotatory means for effecting oscillation of said shuttle and actuating member in timed relation to effect intermittent feeding movement of said shuttle, and means for adjusting the pivotal axis of said actuating member in the plane of movement thereof and transversely of reciprocating movement of said shuttle.

5. In an intermittent feed device the combination with a toothed feed shuttle mounted for pivotal movement and for reciprocating movement along its pivotal axis, of an actuating member mounted at one end for pivotal movement corresponding with reciprocating movement of said shuttle, an operative connection between said shuttle and the other end of said actuating member adapted to accommodate differences of movement therebetween transversely of the pivotal axis of the shuttle, rotatory means for efiecting oscillation of said shuttle and actuating member in timed relation to effect intermittent feeding movement of said shuttle, said rotatory means being operative on said actuating member intermediate the ends thereof, means for adjusting the pivotal axis of said actuating member longitudinally of the reciprocating movement of said shuttle, and a second means for adjustin: the pivotal axis of said actuating member in the plane 01 movement thereof and transversely oi the reciprocating movement of said shuttle.

6. In an intermittent feed device, the combination with a toothed teed shuttle, of spaced and alined bearings carrying said shuttle at opposite ends thereof for pivotal movement and for reoiprocating movement along its pivotal axis including spaced and alined stationary bearing studs, an actuating member mounted at one end for pivotal movement corresponding with 1'8? ciprocating movement of said shuttle, a slot bear-' ing engagement between the other end of said actuating member and the portion of said shut- 15 tle intermediate said ends thereof and operative between said bearing studs and extending trans- Y versely of the pivotal axis of the shuttle, a pair v of timed coaxial rotating cams for effecting oscillationof said shuttle and actuating member in timed relation and disposed axially in a plane normal to the axis of and intermediate said studs, one of said cams being a radial cam operative on said actuating member intermediate the ends thereof and the other cam being an axial cam, and a cam follower on said intermediate portion of said shuttle and extending longitudinally of the pivotal axis thereof and engaged with said axial cam.

BRUNO STECHBART.