US1540329A - Cinematographic apparatus - Google Patents

Description

June 5' 1,540,!329

. J. 'HAPPACHER cmmmocmmzc APPARATUS Fil'ed June .28, 1921 2 Sheets-Sheet 1 .0 FngA. I

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June 2. 1925- 4 1,540,329

J-. HAPPACHER CINEMATOGRAPHIC APPARATUS Filed June .28, 1921 2 Sheets-Sheet 2 QLIH Ill "2 guiding 4 Patented June 2, 1925.

UNITED STATES PATENT OFFICE.

'J'OSEF HAPPACHER, OF ESSEN, GERMANY, ASSIGNOR TO FRIED. KRUPP AKTIEN-- GESELLSCHAFQ 'OF ESSEN-ON-THE-RUHR, GERMANY.

CINEMATOGRAPHIC APPARATUS.

Application filed June 28, 1921. Serial in. 481,081.

To all whomc't may concern:

Be it known that I, Josnr HAPPACHER, residing at Essen, Germany, a citizen of the German Republic, haveinvented a certain new and useful Improvement in Cinemato I ll 2 and that there is interposed between the single-toothed wheel and the shutter a regulating apparatus which when the slngletoothed wheel is rocked, preserves the synchronous running between this latter and I erence to the accompanying drawings which the shutter. v

' The inventionwill be described with refshow an'embodiment of the subject-matter of the invention byway of example together with a modification.

In'these drawings:

Fig. 1 is a vertical section of the first example, certain parts being broken away,

Fig. 2 is a section on the line 2-2 of Fig. 1, seen from above, certain parts being brokenaway, I

Fig. 3 is an axial longitudinal section of a detail on a larger scale, I i

Fig. 4 is a section on theline of Fig. I

2, seen from'the left, v

Fig. 5 is a section corresponding to Fig. 2 of a modification of the first example, and

Fig. 6 and 7 show on a larger scale two details of Fig. 5, one of the details (Fig. 7) being shown in section. I

In the casing A of the cinematographic apparatus is mounted the driving shaft B, on which is fixed a cord pulley b coupled to the driving motor (not shown in the drawings) and a double gear wheel I) I) (see Fig. 1 and 2). The wheel I) is constructed in the form of a worm wheel and engages with a worm wheel 0 which isfixed on a shaft Cmounted vertically in the casing A.

Intothe worm wheel c gears a worm d see Fig. 2), which is fixed onthe shaft D carr ing the shutter d3. To the shaft 0 are also rigid] connected two other 'worm wheels I 0 and "c 4 ()1 these two wheels the upper one,

fixed the single toothed wheel h 0 gears with a worm wheel. 0 which is mounted on the shaft E carrying the transmitting sprocket wheel 0 while the lower worm wheel 0 gears with a worm wheel 7, which is fixed on the shaft F which carries the receiving sprocket wheel f and is provided with a handle for driving the machine by hand (see particularly Fig. 4). H

The wheel b is constructed in the form of a spur Wheel and gears, in theratio of transmission of 1 :1, with a gear wheel G, which has considerably wider teeth than the gear wheel I) and is rigidly connected to a sleeve G This sleeve G is mounted to rotate and also move longitudinally on a shaft H, which engages by means of two oppositely situated partial screw threads 71. in two grooves g in the sleeve G (see Fig. 2 and 3). The shaft H is mounted eccentrically with respect to a rotatable member J mounted in the casing A. This rotatable member J can be rocked about the driving shaft B by means of a pinion shaft K having a milled head 71: and the pinion k of which gears into a toothed sector i the rotatable member J.

The sleeve G is enclosed in a sleeve M, which can be displaced axially in a sleeve shaped guide 2' on the rotatable member J, but is prevented from rotating by a pin i which is fixed in the guide 2' and engages in an axial longitudinal groove m in the sleeve M (see Fig. 1). In the said sleeve M is pro- "vided. a helical groove m in which a par tial screw thread a rigidly fixed to the easing A engages. On the shaft H there is This wheel engages with the Maltese cross n whichis mounted on a shaft N mounted co axially with the driving shaft B and carry ing the middle sprocket wheel n (see Fig. 2). The film P, which is indicated by dot and dash lines in Fig. 4, runs over the upper sprocket wheel 6 the middle sprocket wheel n and the lower sprocket wheel 7* behind the gate a which ismounted on the casing A and cooperates with the shutter d in the well known way. i

When the machine is working normally the following operations take place 2' I The driving shaft B, which is driven by the motor (not shown in the drawings). through the cord pulley b imparts its rotation through the medium of the gear wheel b to the gear wheel G and also to the sleeve provided on,

pinion Z in the toothed'secior G to the shaft H (coupled to these parts by the partial screw threads a which engage in the grooves 9 and to the single toothed wheel 71 The lvlaltesc cross "12. and with it the sprocket wheel 9'1 and the film i? will. be rotated. intermittently by the single toothed wheel 72 On the other hand the rotation pt he driving shaft B will be transmitted worm wheel b through the wer-- to the vertical shaft Q which, throi J medium of the gears c E. c f and 0 (Z D drives the upper sprocl-ret wh l c the lower sprocket wh el 2 and the r 0 tnnzit (it the image tal e place i 2. worlting of the machine and the advance movement at the film P be consetpzentl x atlected so that its adjustment relativ is regulated again, i ed by the aid or" t; rotation of the pinion K causes in con, quence of enga 'ement of the i melting movement of the rotatable mem J and also of the sleeve During;- i. rocking movement of the rotatable me gear wheel G. which mounts-a eccentricall v with respect to the axis of rotation of the rotatable member J. will be displaced by the partial screw thread a which on gages in the groove m of the sleev ll L the latter being prevented from rotat' 13; by the gear members '2?"- m In addition to this displacement however the gear wheel G is simultaneously rotated relatively to the shaft H and the single toothed wheel by the partial screw thread 71 the pitch of the partial screw thread 72 being so selected that the gear wheel G rotated thre" h the same angle through which the rotatable member J is rocked. ll hen therefore the rotatable member 5 is recited. an increased or a reduced speed will be impaled to the gear wheel G and moreover in such a measure that the shatt H. the single-toothed wheel 7& and the shutter (Z always run at the same speed as the diving shaft B. ll ere this not so, the s ncaronism between the mechanism for feeding the iilm and the shutter (Z would be disturbed. lhe rocking; of the rotatable member J also causes however a change in the fundamental position of the Maltese cross uh such fundamental position lacing changed. by the angle through which the rotatable mi her J is rocked. By this means the tee-fl ot the film will be so increased or reduced that a co1nplete image appears at the gate (1' again.

In the modification of the first er-iample which is shown in Fig. 5 to T the gear wheel G which engages with the gear wheel Z) is mounted that it cannot move longitudinally, but can rotate freely on the shaft H. The partial screw threads lettered er J the.

h in the first example are placed on the extended hub of the gear wheel G and are lettered 5 The partial. screw threads engaged in corresponding grooves in the sleeves G which is separated from the gear wheel K? see particularly Figs. (3 and mom ed on the shaft H and has also two other grooves situated opposite each other and running axially, with which two dririn pins 72" fitted on the sha'tt l-l. engage, Bv meats ot' the sl eve (-3 the gs whee G is therefore (f:"l1l1"t0(l' to the sl "tt H in such a way that when the sleeve G moves axially, imitual rotation of the gear wheel G and the shaft H takes place. in the arrangement shown in 1 to l,

In other respects, the type oi con truction shown in Figs. 5 to 7 is the same as that or the type of cons: uction shown in ies. 1 to 4. ment shown in Figs. 5 to stood at once after the d crip ion whicl'i has been given in coi'incri-tuui wi h Fin s. to t.

In comparison .rith the arrangement shown in l to t the construction last described has the advantage that the gear wheel Gr owing to the fact that it s incapable of moving longitudinally. may be provided with teeth of normal width and is also subjected to less wear. 7

In all constructions above described, the centering of the image is thus attained by the fact that by the rocking oi the rotatable member J and therewith of'the single-toothed wheel 72 the fundamental position of the Maltese cross a is changed and the film thereby adjusted. In this case the regulating apparatus which is interposed between the single-toothed wheel/ 2 and the shutter (Z namely 72 G M 0- in Figs. 1 to 4, G M a" in Figs. 5 to l, solves the prob lem of i'naintainiug the relative angular position between the shutter (P, which is not additionally rotated, and the singletoothed wheel 72 that is to say, of maintaining the synchronism of these two parts which is necessary for correct working.

Claims:

1. In a cinematographic apparatus. a film drive including an intermittent driving member, a shutter, said film drive and shutter operating synchronously, he intermittent driving memberof said fihn drive including single-toothed wheel a shaft there for, an intermediate gear wheel. interposed between the shaft of the single-toothed wheel and the. main driving shaft. of the film drive, a displaceable member tor coupling said intermediate gear wheel tothe shaft of the single-toothed wheel, a movement of said displaceable member causing a mutual rotation between said last mentioned shaft and said intermediate gear wheel, means for The wr tlru of the arranoewill be under gle-toothed wheel causes a displacement of said displaceable member.

2. In acinematographic apparatus, a film drive and a shutter, said film drive and shutter operating synchronously, said film drive including a main drive shaft, a singletoothed wheel and a shaft therefor, an intermediate wheel mounted on said last mentioned shaft and driven by said driving shaft, :1 displaceable member for coupling said intermediate wheel to the shaft of said single-toothed wheel, a movcmentof said displaceable member causing a mutual rotation between the shaft of said singletoothed wheel and said intermediate Wheel, a regulating device for rocking said singletoothed wheel andmeans actuated by this said adjustment for causing a displacement wheel, a displacement of said displaceable member causing a mutual rotation between the shaft of said single-toothed wheel and said intermediate wheel, means for causing the displacement of said displaceable member comprising a partial screw-thread rigidly mounted in the casing of the cinematographic apparatus, said displaceable member being formed with a recess and means for rocking said single-toothed wheel and for causing said last mentioned means to displace said displaceable member.

4. In a cinematographic apparatus, a film drive and a shutter, said film drive and said shutter operating synchronously, said drive embodying a single-toothed wheel, a shaft therefor, an intermediate wheel on said shaft and driven by the main driving shaft of the film drive, a displaceable member rigidly connected to said intermediate wheel, said displaceable member operating to couple said intermediate wheel to the shaft of said single-toothed wheel, a displacement of said displaceable member causing a mutual rotation between the shaft of said singletoothed wheel and said intermediate wheel and means for displacing said displaceable member.

The foregoing specification signed at Essen, Germany, this 23rd day of May, 1921.

J OSEF HAPPAGHER.

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