US667618A - Photographic apparatus. - Google Patents

Description

No. 667,6l8. Patented Feb. ,5, I901. E. L. DOYEN. PHOTOGRAPHIC APPARATUS.

(Applicatioh filed July 18, 1900.) (lo Model.)

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No. 667,6!8. Patented Fab. 5, [90L E. L. DOYEN.

PHOTOGRAPHIG APPARATUS.

(Application filed July 18, 1900.! (No Iodol.) 2 Shaats-Sheot 2.

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UNITED STATES PATENT OFFICE.

EUGENE LOUIS DOYEN, OF PARIS, FRANCE.

PHOTOGRAPHIC APPARATUS.

SPECIFICATION forming part of Letters Patent No. 667,618, dated February 5, 1901.

Application filed July 18, 1900. Serial No. 2 1,094. (No model.)

To ctZZ whom it may concern.-

Be it known that I, EUGENE LOUIS DOYEN, doctor of medicine, a citizen of the Republic of France, residing at 6 Rue Puccini, Paris, France, have invented certain new and useful Improvements in Photographic Apparatus, of which the following is a specification.

The apparatus according to this invention is characterized by the combination of a shutter and a rotary cam with a crank-disk turning at a speed (91V) a multiple of the speed V of the cam speed, the crank-disk operating a hook or catch, which draws forward the film, and the cam being so arranged as to remove the hook or catch from the film during (n1)+% of the stroke of the crank-disk. I will presume the crank-disk turns at a speed twice that of the cam and that therefore the hook or catch is removed from the film for one and a half stroke.

Figure 1 is a front view of the apparatus. Fig. 2 is a sectional side elevation of the same. Figs. 3 and 4 are detail views, on an enlarged scale, of the hook engaging the perforations of the film. Fig. 5 is a similar View of a hook engaging a pair of films.

By means of acrank-handleAor equivalent device a toothed wheel 0 and a bevel-wheel D, mounted on its axle B, are driven. The

toothed wheel 0, through a chain E, operates a toothed wheel F half the diameter of the first-named toothed wheel G and a drum G,

mounted on its shaft. The said d rum is adapted to feed the strip of film to the apparatus and is provided on its circumference with four teeth, the distance of the teeth corresponding to the distance apart of the perforations of the film previously indented, the distance apart of these perforations being accurately the length of an image. The aforesaid bevelwheel D drives a bevel-wheel H half the diameter of the wheel D. On the axle of the said smaller bevel-wheel H is a toothed wheel J, gearing with another toothed wheel K, the diameter of these two wheels being in the proportion of the number of teeth on the aforesaid rollersay four to one.

On the shaft of the toothed wheel K are mounted a shutter L and a toothed wheel M and a face-cam N, the said toothed wheel M driving another toothed wheel 0 half its diameter, on the axle of which other toothed wheel is the crank-disk P, operating by a connecting-rod Q a slide R, carrying the hook 'S or catch, terminating rearwardly in a pro jecting part T in contact with the working surface of the aforesaid face-cam N.

The roller G, carrying the four teeth, draws the film by a continuous motion, so that it advances the length of an image for a complete revolution of the shutter L.

I will suppose the hook S or catch to be at the upper end of its stroke at the moment when it engages in the perforation in the film and that there is one perforation for every image. The hook S or catch engages in the perforation in the film at the upper deadpoint of the stroke of the crank-disk P, and it causes the film to descend for the downstroke of the crank-disk and commences to rise again. At this moment the cam N repulses the hook S or catch and keeps it removed from the film during the period of its ascent, the following descend, and a fresh ascent, (the hook S or catch being thus kept back for one stroke and a half of the crankdisk M under the aforesaid conditions,) so that the said hook or catch S is not again set free until at the second time it is opposite the perforation in the film which corresponds to the upper edge of the image which had just been caused to descend. This arrangement enables the film to be gently grasped at the upper dead-point of the stroke of the crankdisk and to be registered exactly, while letting it go at the lower dead-point, and at the same time permitting the speed of descent of each image to be accelerated, and consequently reducing the obtu ration to a very small frac tion of the circumference of the shutter.

No inconvenience is caused by the rapid descent of the film, as a buckle or loop U is formed in the film by the regular rotation of the roller Gr.

A band or strip of film V is caused to bear against a metal plate X, Figs. 2 and t, by means of side plates or lugs Y Z on the hook or catch S, which latter moves in a groove fitted in the plate X. By taking negatives or exhibiting positives one film only is placed between the plate X and the side pieces Y Z; but for printing positives by contact with negatives two films o o are used. For this purpose the hook or catch is made long enough to allow of engaging two films, as shown in Fig. 5. The depth of the groove in the plate X is greater than the length of the hook, so that this latter does not scratch or touch the bottom of the groove.

Having now particularly described and ascertained the nature of my invention and the manner in which the same may be performed, I declare that what I claim is- 1. In an apparatus of the class described, a cam, a crank-disk operating simultaneously therewith, but at a dilferent rate of speed, means for operating said cam and disk, an indented strip of film, means for feeding the indented strip of film to the apparatus, and means engaging in the indentations of said film and operated by said cam and disk for imparting an intermittent movement to said strip.

2. In an apparatus of the class described, a cam, a crank-disk operating simultaneously therewith at a different rate of speed, a rotary shutter operating simultaneously with said cam and disk, means for operating said cam, shutter and disk, an indented strip of film, means for feeding the indented strip of film to the apparatus, and in cans engaging in the indentations of said film and operated by said cam and disk for imparting an intermittent movement to said strip.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

EUGENE LOUIS DOYEN.

Witnesses:

EMILE KLOTE, EDWARD P. MACLEAN.

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