US1165629A - Film-feeding mechanism. - Google Patents

Description

E. SCHNEIDER.

FILM FEEDING MECHANISM.

APPLICATION FILED MAY I8, I910- 1,165,629. Patented Dec.28,1910.

4 SHEETSSHEET I.

E. SCHNEIDER.

FILM FEEDING MECHANISM.

APPLICATION FILED MAY I8, 1910. 1,165,629.

4 SHEETSSHEET 2.

Patented Dec. 28, 1915.

E. SCHNEIDER.

FILM FEEDING MECHANISM.

APPLICATION FILED MAY 18, 1910. 1,165,629. Patented Dec. 28, 1915.

4 SHETSSHEET 3.

Ex SCHNElDER.

FILM FEEDING MECHANISM.

APPLICATION FILED MAY 18, 1910.

Patented Dec. 28, 1915.

4 SHEETSSHEET 4.

adjustable bracket 15. from the bracket 15 and is connected to the EBERHABD SCHNEIDER, OF NEW YORK, N. Y.

FILM-FEEDING MECHANISM.

Specification of Letters Patent.

Patented Dec. 28, 1915.

Application filed May 18, 1910. Serial No. 562,057.

T 0 all whom it may concern Be it known that I, EBERI-IARD SCHxEmEn, a citizen of the United States, and a resident of the borough of Manhattan, in the county of New York and State of New York, have invented certain new and useful Improvements in Film-Feeding Mechanism, of which the following is a specification.

This invention relates to film controlling and steadying devices for consecutive view photographic or projecting apparatus. Its specific object relates to the film controlling and propelling appurtenances which bring the films in proper positions and at the proper times in the axial line of the lens used in conjunction therewith.

One of its essential objects is to maintain said film taut before the window of the apparatus without the usual excessive pressure on the film caused by the door of the window of the apparatus bearing thereon. The pressure against the film as it passes the window is reduced to a minimum and consequently the liability of scratching or otherwise injuring the film is lessened.

Another object of the invention is the elimination of loops in the film during its propulsion between the reels of the apparatus.

Figure 1 represents a side view of a projecting apparatus with one formof the invention incorporated therein, Fig. 2 shows a section of Fig. 1 on the line 22, Fig. 2 shows a section of Fig. 2 on the line 2, 2, Fig. 3 represents a top plan View of Fig. 1, Fig. 4 represents a side view of the essential elements of the invention, and Fig. 5 shows a view similar to Fig. 4 with a modification of the invention. 4

In the drawings 10 represents the base plate from which extend the stanchions 11, 12, the upper ends of which latter are connected by the bracket 13. The base plate 10 supports a pin 14 on which is pivoted the A frame 16 extends adjustable sleeve 17 carried on the stanchion 12. In the bracket 15 is journaled the drivbevel pinion 30 that meshes with the bevel gear 31 on the horizontal shaft 32, journaled in the upper portion of the frame 16. The ratio of the diameter of the bevel pinion 30 to the bevel gear 31 is 1 to 4. The shaft 32 carries at one end the sprocket wheel 33 and at the other the feeding sprocket drum 34. Tension rollers 35 are journaled in an adustable tension bracket 36, which latter at one end is pivoted by means of the pivot 37 to the frame 16, and has bearing against its swinging end the spring 38. A tension arm 42 is pivoted on a pin 43 supported on the bracket 13 secured to thestanchions 11. The swinging end of the arm 42 has journaled thereon the tension roller 45 and a buffer rod 46 is pivoted thereon. The said rod extends through the bracket 13, a buffer spring 47 hearing between the roof of the bracket 13 and the knurled nut 48 on the rod.

On the cross shaft 23 of the frame 16 is secured the spur gear 50 which meshes with a pinion 51 carried on the shaft 52 journaled in the frame 16. The shaft 52 also carries the fly wheel 53 on one end. and a bevel gear 54 on the other end thcr'of meshes with-a bevel gear 55 carried on ihe vertical-shaft 56. The latter shaft at its upper end is journaled in the lens support 57 and its lower end is journaled in the swinging bracket 58. The bracket 58 is hinged on the shaft 52. The shaft 56 carries a bevel gear 65 that meshes with a bevel gear 66 on the shutter spindle 67 carrying the shutter 68. The lens support 57 is carried on the stanchion 12 and has journaled thereon the guide roller 69. A disk wheel 75 is carried on the shaft 52 and has extending therefrom the pin 76 that engages a star wheel 77 fastened on a spindle 78 journaled in the frame 16. The spindle 78 carries the lower sprocket feed drum 79. Tension rollers 80 are journaled in an adjustable "tension bracket 81 and bear on the said lower sprocket feed drum 79. The bracket 81 is pivoted to the frame 16 and a spring 82 extends between the bracket 81 and a pin 83 on the frame 16. A spindle 85 is journaled on the lower part of the frame 16 and carries a third sprocket drum 86.

Tension rollers 87 are journaled in an adjustable tension bracket 88 that is pivoted to the frame 16 and a spring 89 extends between said bracket and the in 83. The frame 16 has extending there rom a pin 92 which engages a tension arm 93 that carrles on its outer end the tension roller 94. A bracket 95 is supported on the frame 16 and guides a buffer rod 96, that is pivoted to the tension arm 93. A knurled nut 97 is 1n threaded engagement with the outer end of the buffer rod 96 and a bufi er spring 98 bears between said bracket 95 and knurled nut 97. On the outer end of the spindle 85 is fastened a sprocket wheel 99 for the chain 100 that connects with the sprocket wheel 33.

A film 105 having holes not shown that register with the teeth of the sprocket drums is fed over the feeding sprocket drum 34, then over the tension roller 45 in the path of the window of the lens support 57. The film then engages with the lower sprocket feed drum 79 over the tension roller 94 to the third sprocket drum 86.

In Fig. 5 the invention ismodified by substituting a pair of elliptical gears 110 and 111 for the disk wheel 75 and the star wheel 77, to transmit a variable velocity ratio from the shaft 52 to the spindle 78. The elliptical gear 111 turns on the shaft 112 and carries the pinion 113 which latter meshes with the spur gear 112 that is carried on the spindle 78. When the pinion 113 makes one revolution, the spur gear 114 makes one quarter revolution. The pitch diameters of the bevel pinion 30 and bevel gears 31, as well as the pitch diameters of the pinion 113 and gear 114 are in the ratio of 1 to 4. The film is thus moved across the window of the apparatus during one quarter of a revolution of each of the drums 34 and 78, the rotations of the said drums being practically synchronized with each other so as to avoid the necessity of any loops therein. Tn this modification the elliptical gears 27 and 28 are retained.

To operate the invention motion is transmitted from the driving shaft 18 to the cross shaft 23 through the spur gear 21 and pinion 22. The bevel gear 24 on the shaft 23 rotates the shaft 25 through the bevel gear 26, and thereby the elliptical gear 27 rotates the elliptical gear 28. Motion is transmitted to the spindle 29 and its bevel pinion 30. The latter pinion meshing with the bevel gear 31 rotation is transmitted to the horizontal shaft 32. The latter shaft 32 making one revolution while the spindle 29- makes four revolutions. The sprocket wheel 33 transmits motion to the sprocket wheel 99 through the chain 100, and thereby the third sprocket drum 86 revolves with-the same number of revolutions as the feeding sprocket drum 34. When the cross shaft 23 revolves motion is transmitted to the shaft 52 through the spur gear 50 and pinion 51. By means of the bevel gears 54, 55, 65 and 66 the shutter 68 is operated. The diskv .wheel 77.

During the downward movement of the film 105 the tension roller 45 and the tension arm 42 take up any slack of the same between said roller and the feeding sprocket drum 34 and the lower sprocket feed drum 79 avoiding any loops in said fihn.- The variable velocity ratio transmitted from the vertical shaft 25 to the spindle 29 through the intervention of the elliptic gears 27 and 28 rotates the feeding sprocket drum 34 at variable speeds of rotation, for each rotation thereof. The tension roller 45 always maintains the film 105 taut irrespective of the speed of the drum 34 and the winding up or taking in of the lower sprocket feed drum 79. The buffer spring 47 connected up with the arm 42 prevents any tremor of the roller 45. The star wheel 77 stops and starts the film at the proper times before the window of the machine in the focal axis of the lens.

The tension roller 94 on the tension arm 93 maintains the film taut between the lower sprocket feed drum 79 and the third sprocket drum 86, and the buffer spring 98 prevents any tremor of the tension roller 94.

With both forms of the invention it will be noted that the elliptical gears when their rotations are properly timed with the shutter of the apparatus that the film moves rapidly across the window when the shutter cuts off the light passing therethrough, and that when the light passes through the window the film can practically be considered at rest.

It will be noted that the variable speed imparted to the drum 34 by means of the elliptical gears 27, 28 pulls the film without tremor from the feeding or supply reel and therefore avoids injuring the film on the sprockets of the drum 34, and at the same time supplies it as required for the sprocket drum 79. The roller 45 maintains the film taut between the two drums, and obviates the necessity of a loop in the film after leaving the drum 34. The taut film avoids the necessity of intermittently tightly clamping the film in the field of the lens of the apparatus, and thereby avoids the injury due to such clamping. A film that is uniformly pulled from its feed reel must be looped to coact with the intermittent motion given to it by drum as indicated at 79. The clamping causes the film to-be injured on account of the inertia of the film when clamped to hold it at rest in the field of the lens. The roller 45 by reason of being movable with the swinging of the tension arm 42, coacts with the elliptical gears 27 and 28, by taking up any slack in the 'film 105, as the latter is moved with a variable speed.

Having described my invention what I desire to secure by Letters Patent and claim is;

1. In a film controlling devicethe combination of a pair of sprocket drums for a film, means to impart a variable speed to one of said drums during each revolution thereof, means to rotate the second drum in unison with the first drum and means to maintain said film taut.

2. In a film controlling device the combination of a feeding sprocket drum for a film, a pair of elliptical gears to impart a variable speed of rotation to the drum, a second sprocket drum to receive the film delivered from the first drum, means to rotate the second drum with the requisite speed of rotation, a roller bearing against the film to automatically maintain the film taut between the drums.

3. In a film controlling device the combination of a feeding sprocket drum for a film, a pair of elliptical gears connected up with said drum to impart thereto a variable speed of rotation, a tension arm pivoted in the machine, a roller journaled in the arm and bearing against said film to maintain it taut with said feeding drum, a lower sprocket feed drum journaled in the machine, means to rotate the latter drum, a second tension arm pivoted in the machine, a tension roller journaled in said second arm bearing against the film to maintain it taut.

4,. In a film controlling device the combination of a sprocket feed drum for a film, elliptical gears connected up with said drum to impart thereto a variable speed of rotation, a tension arm pivoted in the apparatus, a roller journaled in the arm and bearing against said film to maintain it taut with said sprocket feed drum.

5. In a film controlling device the combination of a shaft, a disk wheel on the shaft, :1 pin on the disk wheel, a star wheel journaled adjacent to the first shaft in the path of said pin, a lower sprocket feed drum connected up with the star wheel, a feeding sprocket drum carried onahorizontal shaft, a driving shaft journaled in the apparatus, a pair of elliptical gears connected up between the driving shaft and the feeding sprocket drum, and connections between the driving shaft and the disk wheel, a tension arm pivoted in the apparatus, a roller journaled on the tension arm bearing against a film engaging the drums and taking up the slack of said film.

6. In a film controlling device the combination of a pair of elliptical gears, sprocket drums connected up with said elliptical gears to impart a variable speed of rotation to the said drums.

7. In a film controlling device the combination of a feeding sprocket drum journaled in the-apparatus to engage a film, a lower sprocket feed drum journaled in the apparatus to next engage said film, a third sprocket drum journaled in the apparatus to thirdly engage said film, a driving shaft journaled in the apparatus, a pair of elliptical gears connected up between the said first named feedin sprocket drum and said shaft, connections between the driving shaft and the second drum to rotate the latter, and means to rotate the third sprocket drum.

8. In a film controlling device the combination of a feeding sprocket drum journaled in the apparatus to engage a film, a lower sprocket feed drum journaled in the apparatus to next engage said film, a third sprocket drum journaled in the apparatus to thirdly engage said film, a driving shaft journaled in the apparatus, a pair of elliptical gears connected up between the said first named feeding sprocketdrum and said shaft, connections between the driving shaft and the second drum to rotate the latter, and means to rotate the third sprocket drum, a tension roller bearing on the film adjacent to the feeding sprocket drum, and a tension roller bearing on the film adjacent to the third drum.

9. In a film controlling device the combination of a driving shaft,a feeding sprocket drum journaled in the apparatus for a film, a tension arm pivoted above the drum, a tension roller journaled in the arm bearing against the film, a buffer spring in the apparatus for said arm, a second lower sprocket drum journaled in the apparatus engaging the film, a third sprocket drum journaled in the apparatus engaging the film, a second buffer spring connected up with the apparatus adjacent to the second and third drums. a tension arm coacting with the second buffer spring, a roller journaled in the second tension arm bearing against the film, a driving shaft journaled in the apparatus, a pair of elliptical gears connected up between said shaft and one of said drums, connections between the drum that eoacts with said gears and one of the other drums, and connections between the driving shaft and the remaining drum.

Signed at the borough of Manhattan in the county of New York and State of New York this 11th day of May A. l). 1910.

EBERlIARD SCHNEIDER- [L- 8.]

Witnesses:

A. A. on BONNEVILLE, MAn'riN ZIMANSKY.

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