US1137958A

US1137958A - Portable apparatus for projecting stationary or animated pictures.

Info

Publication number: US1137958A
Application number: US77696413A
Authority: US
Inventors: Charles Dupuis
Original assignee: Individual
Current assignee: Individual
Priority date: 1913-07-02
Filing date: 1913-07-02
Publication date: 1915-05-04
Anticipated expiration: 1932-05-04

Description

PORTABLE APPARATUS F C.- DUPUIS. 0R PROJECTING STATlONARY 0R ANIMATED PICTURES;

APPLICATION FILED 1ULY2.1913.

Patanted May 4:," 1915.

2 SHEETS-SHEET I.

C. DUPUIS.

' PORTABLE APPARATUS FOR PROJECTING STATIONARY 0R ANIMATED PICTURES.

' APPLICATION FILED IULY2. 1913.

1,137,95 A Patented May 4, 1915.

2 SHEETSSHEET 2- (II-TABLES DUPUIS, F CHABENTO'N, FRANCE.

PORTAB LE APPARATUS FOR PROJECTING STATIONARY OR ANIMATED PICTURES.

Specification of Letters Patent.

Patented May 4:, 1915.

Application filed July 2; 1913. Serial No. 776,964.

To all '10]? out it may concern: Be it known that I, CrrAnLns DUPUIS, cit zen of the Republic of France, residing at 22 Rue de la Cerisaie, Charenton, Seine, in the said Republic, engineer, have invented certain new and useful Improvements in Portable Apparatus for Projecting Stationary or Animated Pictures; and I do hereby declare the following to be a full, clear, and exact description of the l11VQ'I1'l3lO11,'S1lCll as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification,

The invention has for its object an apparatus for projecting stationary or animated pictures, in which all the parts are brought centrally close together and above a casing constituting the base (whiclrcan itself be covered by a, removable cover) in a manner to cause as little encumbrance as possible, to be capable of being moved about very easily and to be put in operation conveniently and rapidly.

This apparatus is characterized by the picture band (cinematographic film or band for independent stationary picturesybeing displaced in a horizontal direction before the exposure aperture, also horizontal, and by the light being produced from a source whose rays after traversing the exposed image in a vertical direction are reflected hori zontally on to a screen. This reflection is obtained by means of a prism of the kind giving total reflection, arranged in the base of the apparatus 111 front of a horizontal object glass; or an object glass with very short focus be used the glass can be placed advantageously in front of the prism. The rays emanating from the luminous source, Which may. be an electric or acetylene lamp or other suitable device, traverse first of all a water bath for cooling purpose; this bath is closed atits uper partbyalens having a lower convex face, so as to obviate any agitation of the liquid surface and to drive toward the edges of the bath any gaseous bubbles that the heat may give rise to.

The accompanying drawing shows all the details of anapparatus constructed according to this invention.

Figure l is a longitudinal section and Fig. 2 transverse axial section.

It will be seen from the drawing that the apparatus comprises a bottom casing or box 1, constituting the base, which is closed in front by a hinged door 1, while its top face consists of a metal plate 2 carrylng the whole of the mechanism. The image band is unrolled, as usual, from a bobbin 3 mounted on a horizontal aXiS or spindle 4 carried by an arm 5 "articulated at.-its lower end onv tion or in 'a position suited for transport.

The band unwound from bobbin 3 passes over the toothed cylinder 13 againstwhieh it is retained by small rolls or pins 1+1 carriedby the.articulated support 15; then,

havingmade a bend, it passes horizontally into a passage leading to the exposure aperture formed in a slide 16 adjustably mounted in an opening in plate 2 against which said band is pressed by a spring shutter 17 articulated on the same plate. After leaving the'exposure aperture, the band passes over toothed cylinder 18, against which it is pressed by small rollers 19 carried by the movable shutter 17. Metal guides 20 direct, in the usual manner, the band on both sides of the exposure aperture. The band, after making a bend, then passes over another toothed cylinder 13, similar to cylinder 13,

and provided with rollers 1e carried by the articulated support lo it is thenwvound on the take-up bobbin 7 which is driven in a manner to be described hereafter.' In Fig. 1,

the path of the image band is indicated by the dotted line 21.

The driving shaft 22, on which can be mountedthe operating handle 23, is coupled by'ineans of a train of gears 24 with the driving shaft 25 carrying the flywheel 26;

this latter shaft actuates, by means of intermittently operating mechanism, for example a Maltese cro'ss gear 27, the spindle 28 of the feed or draw cylinder 18 in a manner to impart an intermittent advancing I movement to the band.- The shaft 22 operates, by means of a train of gears 29 the spindle 30 of the toothed cylinder 18 which means of chain 32 drives another chain Wheel 31*? carried b of the band. The spindle. 30 also carries a grooved pulley 33, which, by means of a cable or belt 34:, which can be of metal," drives a' similar pulley 35 mounted on shaft-8 of the bobbin 7. -Pulley 35 is for this purpose coupled to shaft 8 by a friction coupling, whose action is regulated by the tension of spring 36 in a way to allowthe slipping of this pulley on the bobbin shaft in the case of an abnormal pull on the band occurring which might cause it to break.

The objective device comprises a movable cylindrical portion 37 which contains the object glass and. a stationary conical portion 38 which projects through one Wall of the case l and through which the luminous rays are projected onto the screen. On the inner'end ofthe cylindrical portion 37 is arranged a total reflecting prism 39, the upper, horizontal face of which is directly below the exposure aperture. As stated above, the position of the objective glass can be modified if it has a .very short focus and the exposure aperture may also be adjusted to center it exactly above the axis of the prism 39. The slide 16 is mounted between guides (Fig. 2) on the underside of the plate 2 and is shifted by means of a rack and pinion 40, the rack on the slide being engaged by the pinion having a spindle which projects outside the case where it is provided with a milled button 41. The cylindricalportion of the objective device is adjustable, from outside the case, by a rack and pinion 43, the pinion being on a spindle having a milled end 42 and engaging the rack which is on said cylindrical portion 37.

The shutter 44. is mounted immediately above the object glass and prism, and is actuated by the shaft.25 by means of the worm gear 45. The lantern 46 is arranged axially with respect to the exposure aperture 16; it is connected with a slide 47 movable on a vertical support 48, to which it can be clamped by a clamping screw 49. Let it be supposed that an electric filament lamp, 50 of the Nernst type for example, be used and be arranged in the hinged cap 4z6 of the lantern 46. Below the lamp is arranged a condenser 51 and below the latter is a water bath which consists of a re ceptacle 52 having a glass bottom and a plano-convex lens cover 53. As the receptacle is completely filled with water, agita tion of the latter is prevented and the gaseous bubbles, set free by the heat, are directed toward the side of the receptacle by the convex face of the lens. is disposed an electric resistance 54, arranged in the leads 55 conducting current to'lamp 50. At 55 on the wall of the base the spindle of cylin-- d'er 13 in a way to e ect the continuous feed In the base 1' 1 are indicated two terminals for the current for the luminous source.

The two bobbins 3 and T can be withdrawn from spindles 4 and S by turning down the articulated end parts 56 of these spindles, whiclrcnd part is turned up nornnflly, in a. manner to retain the bobbins in working position. The bobbins are locked to the spindles to insure rotation therewith by any suitable means. In the form shown, the nave or hub 57 of the bobbin projects through the heads of the latter-and has two notches formed in one end adapted to engage a pin 58 which projects transvei's-ly through the spindle. The turned up end portion 56 prevents lateral movement of the bobbin and holds the notch end of the hub in contact with the pin as shown in Fig. 2. f,

When bobbins 3 and 7 have been withdrawn 'from their respective spindles, the arms 5 and, 9 can be oscillated and be turned after the clamping screws 11 have been loosened, so that they approach the axis of the apparatus. If, at the same time the lantern l6, lG be lowered by loosening its clamping screw 49 the whole upper part of the apparatus will give rise to little encumbrance, so that the whole can be covered by a cover 59 provided on its side with spring lugs 60 which engage pins 61 carried by the opposite sides of the base 1. The handle 23 can be withdrawn from the shaft 22 and placed, for example, in the base, so as to allowof easy transport and obviate all fear of damage to the mechanism.

The handle 23 if desired can be mounted directly onthe driving shaft 25, the diameter of which with respect to the shaft 22 can be, for example, as 1 is to S. This allows, in the case of stationary projections, of the band being advanced by one image only for each revolution of the handle, by thus determining exactly the point of the cessation of the movement at the moment of the exhibition on the screen.

The above described apparatus is quite symmetrical, moreover the weight is conthe top and adapted to project light rays vertically through the aperture, reel supports 'plvotally mounted on the top and adapted to be swung to and from the center ,of the latter, means to feed a picture film between the lamp and aperture, a total rei-fiecting prism in the casing arranged to reflect the vertical, light rays horizontally,

' lamp arranged to project light rays verti-.

2. In an apparatus for the projection of f stationary and animated pictures, a casing having an exposure aperture on'its top, a

cally through the aperture, a cooling device mounted between the lamp and aperture comprising a casing completely filled with liquid, a plane-convex lens closing the top of the casing with'the convex face ofthe lens in contact with the liquid, means to feed a picture film between the cooling device and the aperture, a total reflecting prism in the casing arranged to reflectthe vertical light rays horizontally, and an objective device in the casing through which the horizontal rays are reflected.

3. In an apparatus for the, projection of stationary and animated pictures, a casing having an exposure aperture on its top, a-

lamp arran'gedto pro ect light rays vertically through the aperture, a cooling device mounted between the lamp and aperture comprising a casing completely filled with liquid, a plano-convex lens closing the top of the casing with the convex face of the lens in contact with the liquid, means to feed a picture film between the cooling device and the aperture, a total reflecting prism in the casing arranged to reflect the vertical light rays horizontally, an objective device in the casin throughwhich the horizontal rays are re ected, and means to adjust the exposure aperture relatively to the reflecting prism.

I .4. In an apparatusfor theprojection of stationary and animated pictures, a. casing" mounted between the lamp and aperture comprising a casing completely filled with liquid, a plano-convex lens closing the top of the casing with the convex face of the lens ,in contact with the liquid, means tofeed a picture film between the cooling device and the aperture, a total reflecting prism in the casing arranged to reflect the vertical light rays horizontally, an objective device in the casing through which the horizontal rays are reflected, means to adjust the objective device; and means to centerthe aperture axially of the prism.

5. In an apparatus for the projection of stationary and animated pictures, a casing having sin-exposure aperture in its top, a lamp mounted on the latter and adapted. to project light rays vertically through the aperture, means to adjust the lamp 'perpendicular to the top, reel supports pivotally mounted on the latter and adapted to be swung toward and from thecenter of the top, reels journaled in the supports, mechafiect the vertical rays horizontally.

In testimony that I claim the foregoing as my invention,-l[ have signed my name in presence of two subscribing witnesses. v

Witnesses:

HANSON C. Coxn, Anemia FARE.

CHARLES nurursf;