US1097483A - Loop-setter. - Google Patents

Description

J. M. TRfiLETT.

LOOP SBTTIFR. APPLICATION FILED NOY.26,1912.

Patented May'lg, 1914.

2 SHEETS-SHEET 1.

DUO DUDDUD ODDD unDODDDDUfl DUDQUDDDDDUGDGDDDD.

M M WP 7 m m M d ATTORNEYS ;J. M. TRIPLETT.

LOOP SETTER.

APPLIOATION FILED NOV.26,1912'.

w my

ATTORNEYS I JAMES M. TRIPLETT, OF V ENATCHEE, 'WASHINGTON.

, IQO OP-SETTER.

1 ,ootnss.

Specification of Letters fatent.

. Patented May 19, 1914.

Application filed November 26, 1912. Serial No. 733,628.

T0 (ZZZ whom it may concern Be it known that I, JAMES M. TRIPLETT, a. citizen of the United States, and a resident of lVenatchee, in the county of Chelan and State of Washington, have invented a' out interfering with the operation of the machine in the performance of its usual display functions.

Amongthe objects, therefore, of the invention, is to provide a mechanism of a simple nature under the immediate control of the operator of the machine whereby the loop may be setor shifted as may be re.-

quired without stopping the machipe or in terfering w1th its intended purpose.

A further object of the invention is to devise an attachment adapted for use in connection with any standard moving picture machine, any changes necessary to adapt the device for the various machines being of a simple and easily understood character.

The foregoing and other objects of the invention will hereinafter be more fully described and claimed and illustrated in the drawings accompanying this specification in which like characters of reference indicate correspondingparts in all the views, and in which Figure 1 is a rear elevation of a well known form of moving picture machine to which this improvement is applied; Fig. 2 is a vertical section taken at right angles to Fig. 1 and showing the upper parts diarammatically; Fig. 3 is a detail view showlng the principal parts of my improvement in the position which they will occli w \il1e1'i setting the-loop; Fig. 4 is a similar view showing the parts in normalposition; and Figs. 5 and 6 are detail perspective views of several parts described below.

Referring particularly to the drawings, I show, by Way of illustration, a standard form of moving picture apparatus 10 in- As usual, the film is operated downwardly from the upper magazine (not shown) between rollers 12, be tween an upper sprocket 13 and a tension roller 14:XVl18I'G it forms a loop 15, thence passingover an upper film gate roller 16,

thence downwardly between an intermittent sprocket 17 and a lower film gate roller I8 forming a lower loop 19 and passing thence over alower sprocket 20 and under a tension roller 21 to the lower magazine 22, where'it is rolled upon a reel 23.

The foregoing description of the film and guiding means is to be understood as illustrative rather thanv in a limiting sense, the object of such description being to make it clear how the invention may be applied.

In practice there are times when the lower loop 19, for example, becomes taken up and the film is in danger of being broken due to the direct pull thereon by the lower sprocket 20; In order to obviate this diffi preferred embodiment, I mount the lower I sprocket 20 upon a transverse shaft 24 which is journaled in a bracket 25 carried by the main frame of the machine. Said sprocket 20 is so mounted upon the shaft as to provide a certain amount of longitudinal relative movement between them as, for instance, by means of a slot 26 in one of the parts and a Stud 27 projecting into said slot from the other of said parts. The stud, however, will insure the simultaneous rotation of the sprocket and shaft. The sprocket 20 is intended to operate substantially snugly against one end of the bearing 25, and a pinion 28 is journaled loosely upon the shaft adjacent the other end of said bearing 25. Said pinion 28 cooperates with any suitable gear 29 of the usual transmission mechanism of the machine and is maintained in such meshing position by means of a flange 28. To the opposite side of the pinion 28 is secured a clutch member 30 which is adapted to cooperate with a clutch member 31 secured to a pulley from which the reel 23 is operated by means of a belt 33 under normal conditions. pulley 32 is rigidly secured to the shaft 24.- in any suitable manner and hence when the clutch members are interlocked, as shown in Fig. 4, the shaft and sprocket 20 will be caused to rotate by reason of the rotation of the pinion 28 from the transmission 1nechanisln including the gear 29.

Should itbe desired, or necessary, to make or lengthen the loop 19 of the film, it may readily be done by stopping the rotation of The the sprocket 20, the other parts of the film operating devices continuing in their regular movements. The result, therefore, will be that the loop 19 will be formed-and when of the proper size the sprocket 20 may again be started with corresponding rotation of the reel 23. The means I employ for stopping the operation of the sprocket 20 and reel includes the means shown in the form of a lever 34 by which the shaft 24 is slipped laterally through the sprocket 20 and hearing 25 sufficiently far to disconnect the clutch members 30 and 31. The pinion 28 being loose on the shaft and maintained in position with respect to the gear 29'will no longer transmit rotation to the shaft, but

will continue rotating idly around the shaft-- 24. The means I prefer to employ for connecting the lever 34 to the shaft includes a head 35 having loose pivotal connection at 36 with one end of the lever. The end of the shaft is extended into a socket 35 of the head and is provided with an annular groove 87 into which one or more screws 38 project to prevent separation of the head and shaft but permitting free rotation of the shaft within the head. The lever 34 is pivoted upon the upper end of a bracket 39 and secured in any suitable rigid position with respect to the machine. I

At 40 is shown a spring surrounding the shaft 24 and acting at one end against the sprocket 20 and at the other end against a collar 41 adjustably connected to the shaft, the tendency of such spring being to hold the clutch members 30 -and 31 in normal engagement, as shown in Fig. 4. When, however, it is desired to set the loop, the operator will throw the lever 34 so as to cause the shaft and collar 41 to operate against the tension of the spring 40 and throw the pulley 32 with its clutch member 31 away from the clutch member 30. When the proper loop is made, the operator, therefore, has but to release the lever 34, permitting the spring to throw the parts into their normal position.

The several parts of this attachment may be made of any suitable materials, and the shifting hers between relative sizes, proportions and locations thereof may be varied to a considerable extent, depending upon the type or character of the machine to which the attachment is to be applied, without departing from the spirit of the invention hereinafter claimed. Having thus described my invention, I

claim as new and desire to secure by Let tors Patent l. The herein described attachment for a moving picture machine comprising, in com- 60.

bination, a. shaft, means to support the shaft for rotation, a sprocket secured to the shaft for rotation therewith, said supporting means holding the sprocket from. longitudinal movement, means to rotate the shaft and sprocket, said rotating means including a pinion loosely mounted on the shaft, the pinion having a flange to prevent it .from in a direction parallel to its axis, fixed to the shaft, and clutch memthe pinion and pulley normally connecting them together, and means to shift the shaft longitudinally with respect to the sprocket and pinion for the purpose of stopping the operation of the sprocket while the pinion may continue to rotate. r

2. The herein described attachment ,for moving picture machines comprising. a shaft, a support for the shaft a film sprocket connected to the shaft for rotation therewith,- means to maintain the sprocket in fixed position with respect to the axis of the shaft, means to rotate the shaft including a clutch, one member of which is secured rigidly to one end of the shaft, a non-rotary head loosely secured to the other end of the shaft, a lever under the control of the operator connected to the head for moving the shaft longitudinally of the sprocket to disconnect the clutch, and means to automatically restore the parts to normal position.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JAMES. M. TRIPLETT.

a pulley l Vitnesses:

N. M. SoRnNsoN, MYRTLE C. ROGERS.

Images