US1708087A - Cinematographic exposing apparatus - Google Patents

Description

April 9, 1929. H.,|=R1Ess 1,708,087

CINEMATOGRAPHIC EXPOSING APPARATUS Filed Nov. 16, 1926 5 k F if, in la n 1 [Ya 9 a I o %1 1 w:-

f 5: WM!!! I NW N W MW f@ i I 5 Patented Apr. 9, 1929.

UNITED STATES PATENT OFFICE.

HANS FRIESS, OF BERLIN-WILMERSDORF, GERMANY, ASSIGNOR TO ASKANIA-WERKE A.-G. VORMALS CENTRALWERKSTATT DESSAU UND CARL BAMBERG-FRIEDENAU, F BERLIN-FRIEDENAU, GERMANY, A CORPORATION OF GERMANY.

GINEMATOGRAPHIC EXPOSING APPARATUS.

Application filed November 16, 1926, Serial No. 148,706, and in Germany November 17, 1925.

i and secondly, its front portion can be opened upwardly. It is already known to provide cinematographic exposing apparatus with a plurality of objectives adapted to be used alternately and arranged in a rotatory head, ,7

but the arrangement and combination of the parts in said apparatus as designed up to now' has beenv such that the film holders could be arranged'either only one behind the other or one above the other, the film being in either case conducted in a straight line from the one holder across the objective to the other holder.

It is with such devices, when the film holders are arranged side by side, difiicult to house the upper film loop inja suitable manner because that place at which the loop forms is occupied already by the rotatory objective carrier. The first par-tof the present invention relates to providing-a suitable space for that loop, and for this purpose I have provided a separate space behind the rotatory carrier at the top of the apparatus by arranging thefront portion of the top plate 'of the apparatus on a higher plane, and also the adjacent portion which is hinged to that'raised top portion rises u to it whereby said separate space for the Elm loop mentioned is obtained.

Another part of. this invention consists in the feature thatthe rotatory objective carrier is located completely within the micetion apparatus, or is, in other wor s, surrounded on all sides with a protective casing whereby it is prevented completely from be- 40 ing damaged.

, I Q Finally, the space in which the rotatory objective carrier is housed may alsb be closed by a cover, having an opening arranged c'oaxially with that objective which is in its working position and to this cover may be fastened a separate tube ring locatedcoaxially with that objective which is in its working position; that tubejri'ng 1s lntended for, attaching to it, for certaln extraordinary ber, for instance such a one as employed in tele-optics, the like.

The invention is illustrated diagrammatically and by way of example on the accompanying drawing, on which Fig. 1 is a longitudinal section through a cinemategraphic exposing apparatus designed accordin to this invention, and

Fig. 2 is chiefi a plan and partly a hori zontal section 0 the same.

On the drawing, a denotes the main box proper of the apparatus, 6 its front portion which can be opened upwardly, andchinges connecting a and b with each other. The rotatory head (I which carries a plurality of objectives e is housed in the portion 72. That ob ective which is in its lowermost position at the time being is in its working position opposite the film i. The rotatory head is turnable upon the pivot g and can be fixed in its adjusted position by any suitable means (not shown in the drawing). In the main box a are arranged side by side a winding-off film holder 17 and a winding-on film-holder 0 The film strip i leaving the holder p passes over a sprocket wheel k,,,forms then a loop 70 and proceeds now downwardly across the objective opening f, the film, after having been exposed forms another loop 2 passes over another sprocket wheel 9, and disappears finally in the holder 0 To render possible the formation of the 100 is without colliding with the uppermost objective which isnot? in its working position, the'box portions a and b are enlarged upwardly in the manner shown in- Fig. 1, that is to say, while in the old constructions the plane m is the bordering plane of the entire top surface of the apparatus, the top plane of the portion 71 of the apparatus is nowhigher and the two top portions of a and b are connected with each other by an oblique wall portion a; in front of the portion 6 and below the'higher top portion is a chamber la enclosing the film loop k which is, therefore, not in the least disturbed by the rotatory head (i, or by the objectives 8 respectively.

or an additional diaphragm, or

Adjusting the device into working position may be effected in various ways, for instance by hand.

There is provided also a device for adjusting the distance, this device consisting of a lever s aifixed firmly to an axle 23 inserted into a hollow pivot g and carrying a pin a engaging a groove 41' provided at the inner side of the bore of the pivot g. A screw w screwed into the hollow pivot g from the front end of this latter holds all these parts together. If the lever s is turned in one or the other direction the pin a is moved along in the curved groove 0 whereby the pivot g, together with the rotatory objective carrier, is shifted axially to the one or the other side.

This adjustment serves for regulatlng the distance. The graduated scale m pertaining to the lever s is of tubular shape so that that portion which pertains to the objective that is in its Working position at the time being,

can be exposed to view.

As appears from the drawing, the rotatory objective carrier is located completely within a casing. This casing may be formed for instance by a chamber 1 of the camera, the walls of which enclose the respective objective on all sides. Said chamber 3 is, preferably, closed by a cover 2 afiixed to the casing by screws 2 and leaving an opening solely at that place where the just employed objectiveis located.

It is suited tothe purpose in view to provide at said place a tube ringT, the threadcarrying extension of which extends through said cover 2 and is affixed to it by a nut T This tube ring is provided in known manner withan extension T to which, if needed, a

particular optical device or member such, for instance, as employed for tele-optics, or an additional diaphragm, mav be attached.

The arrangement and combination shown may be modified in various ways without departing from the gist of the invention, the latter being applicable not only with cinematographic exposing apparatus in which the several objectives are located in a rotatory head or carrier, but also with such in which this carrier is shiftable in a plane.

I claim:

1. In a cinematographic exposing apparatus, in combination, a main box of the camera, a separate front portion connected with said box in such a manner as to be adapted to be opened pivotally and being enlarged relatively to the main box, a plurality of objectives arranged within said front portion, a common carrler for them, a winding-ofi film holder and a ,wlndlng-on film holder arranged side 'by side within the main box,

guide members for the film and an enlarged portion arranged on the main box and formmg with the said front portion a chamber adapted to receive that portion of the film loop which is located near said objective carrier.

2. In a cinematographic exposing apparatus, in combination, a main box of the camera, a separate front portion connected with said box in such a manner as to be adapted to be opened pivotally, a plurality of objectives arranged within said front portion, a common carrier for them, a. windingofi' film holder and a winding-on film holder arranged side by side within the main box, guide members for the film and a chamber formed by a higher portion of the main box and front portion, an oblique wall portion connecting the top walls of said main box and said higher portion with each other, said chamber being adapted to receive that por-' tion of the film loop which is located near said objective carrier.

3. In a cinematographic exposing apparatus, in combination, a main box of the camera, a separate front portion connected with said box in such a manner as to be adapted to be opened pivotally, a plurality of objectives arranged within said front portion, a common carrier for them, a winding-off film holder and a winding-on film holder arranged side by side within the main box, guide members for the film, a protective casing connected with said front portion and enclosing said objectives and said carrier on all sides, a closure adapted to close said protective casing at its front and having only an opening arranged coaxially with that objective which is in its working position and a tube ring afiixed to and arranged over the opening of the closure and adapted to receive a special optical device.

4:. In a cinematographic exposing apparatus, in combination, a main box of the camera, a separate front portion connected With'said box in such a manner as to be adapted to be opened pivotally and being enlarged relatively to the main box, a plurality of objectives arranged within said front portion, a

I common carrier for them, a winding-ofi' film holder and a winding-on film-holder arranged side by side within the main box, guide members for the film, an enlarged portion arranged on the main box forming with in the said front portion a chamber adapted to receive that portion of the film loop which is located near said objective carrier and a protective casing enclosing said objectives and said carrier on all sides.

5. In a cinematographic exposing apparatus, in combination, a main box of the camera, a separate front portion connected with said box in such manner as to be adapted to be opened pivotally and being enlarged relatively to the main box, a plurality of objectives arranged within said front portion, a

common carrier for them, a windingofi' film holder and a winding-on film holder arranged side by side within the main box,

guide members for the film, an enlarged porclose said protective casing at its front and tion arranged on the main box forming with having only an opening arranged coaxially said front portion a chamber adapted to rewith that objective which is in its working 10 ceive that portion of the film loop which is position.

located near said objective carrier, at protec- In testimony whereof I have aflixed my tive casing enclosing said objectives and said signature.

carrier on all sides and means adapted to HANS FRIESS.

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