US2856713A - Holder for transparent photographic plates - Google Patents

Description

0d: 21 1958 L. P. MOHSCA HOLDER FOR TRANSPARENT PHOTOCRAPHIC PLATES I r 2 Sheets-Sheet 1 Filed Feb. '7, 1955 Oct.'21, 1958 L. P. MOSCA 1 HOLDER FOR TRANSPARENT PHOTOGRAPHIC PLATES Filed Feb. 7. 1955 2 Sheets-Sheet 2 United States Patent HOLDER FOR TRANSPARENT PHOTOGRAPHIC PLATES Louis Paul Mosca, Paris, France Application February 7, 1955, Serial No. 486,311 Claims priority, application France February 8, 1954 8 Claims. (Cl. 40-64) The present invention relates to an improved holder for diapositives, i. e. transparent positive photographic plates.

The main object of this invention is to provide a holder for diapositives which makes it possible to successively position a number of diapositives in a luminous projection apparatus without it being necessary to manually handle each diapositive separately.

According to the invention, the holder comprises a frame member adapted to receive a diapositive and support same by the peripheral portion thereof, and depending connecting means carried by said frame member adapted for pivotably connecting one such frame member to a similar one whereby a number of similar frame members may be assembled into a chain like formation.

Other and further objects and advantages of the invention will be apparent to those skilled in the art from a consideration of the following description of two embodiments of the invention, shown by way of examples, in the accompanying drawings, in which:

Fig. 1 is an elevational front view of a holder for a diapositive according to the invention.

Fig. 2 is an elevational front view of a stiffening member for said support.

Fig. 3 is a vertical section taken along the line III-III of Fig. 1.

Fig. 4 is a view similar to that of Fig. 3, the diapositive being removed from the holder.

Fig. 5 is a horizontal section taken along the line VV of Fig. 1,

Fig. 6 is an elevatio-nal front view of a modification.

Fig. 7 is an elevational view of the corresponding stiffening plate with the hinge pin mounted therein, and

Figs. 8 and 9 are a vertical and horizontal section taken respectively along the lines VIII-VIII and IXIX of Fig. 6.

In the following description, as well as in the appended claims, it will be understood that every time a diapositive is recited, this means a transparent positive photographic plate, as now commonly in use in connection with color-photography. Said plates are not necessarily made of glass and may be of a flexible material.

Referring now to the drawings and more particularly to Figs. 1 and 3 the holder for a diapositive 11 is constituted by a resilient frame member 1, composed of two parallel walls connected together at their end portions as considered in longitudinal direction; the slot provided between the two walls see also Fig. 5 permits of laterally engaging into the frame a stiffening member 6 with corners 7, 8, 9, 10 on one hand, and the diapositive 11 on the other hand.

The stiffening member 6 comprises a window 12 through which travel the luminous rays projected by the objective of a projection apparatus. The corners 7, 8, 9, 10 protrude out of the sides of the frame, they are adapted to retain the assembly inside conventional slideways of the projection apparatus.

' guides of the projection As shown in Fig. 4, the resilient frame 1 is moulded in such a manner that both walls are separated from each other only a short distance. According to Fig. 3, the introduction of a stiffening member 6 and of a diapositive 11-11' in between said walls widens the interval between the resilient walls of the frame 1, which makes it possible to hold the assembly in a fixed position.

The connection between several similar frames for the diapositives is ensured by resilient and removable hinges. According to the example illustrated in Fig. 1, the endwise portions of the frame 1 are provided with a male 2 and a female 5 element respectively.

A metallic pin 3 is engaged into the head of a lug 2 and the two end portions of the pin 3 are adapted to be engaged into the corresponding portions of an identical frame member formed with bores 4 provided on either side of a cut out portion 5 in which the lug 2 is itself an gageable.

The ends of the 4 by virtue of the articulation of the pin 3 may be inserted into the bores resiliency of the frame member. The frame is secured about the axis of the pin 3. A number of identical frames may be connected in this manner. The chains of diapositive supporting links thus obtained may be mounted on rollers or any other magazines.

In the modification illustrated in Figs. 6 to 9 incL, the stiffening member or plate 15 is embedded at the moment of moulding the rubber frame 1. Its shape is substantially similar to that of plate 6 (Fig. 2) but its dimensions are slightly smaller in order to permit of the rubber completely overlapping said. plate. The aligned holes 24 through the plate 15 allow the passage of the rubber during molding in order to reinforce the connection of the frame 1 to said plate 15.

This plate 15 carries four protruding lugs 16, 17, 18, 19 near the corners thereof which areadapted to slide in the objective. 20 is the window of the stiffening plate 15. I

The pin 3 of the hinge is mounted as at 22, in a lug 21 of the metallic plate 15, said lug being itself embedded within the rubber 2 of the frame 1.

As explained hereinabove the frame 1 has a male and a female element of a hinge on two opposite sides thereof which makes it possible to create a chain of frames, the hinge pin 3 being inserted into the bores 4 on either side of the notch or cut out portion 5 of the adjacent frame.

Fig. 8 shows the structure of the elements along the plane VIII-VIII of Fig. 6; the diapositive plate adapted to be placed into the frame however has not been represented.

The top slot 23 parallel with the hinge pin 3 permits of introducing the diapositive into the frame.

As it appears in the drawings and particularly in the cross-sections of Figs. 8 and 9, the gap between the two walls of the frame I does not open outwardly of the frame except along the slot 23 provided along a single side of said frame.

This construction distinguishes from that of the embodiment shown in Figs. l-5 in which the frame 1 is provided with a lateral slot in each of its lateral sides as it clearly appears in Fig. 5, while the top and bottom sides thereof are closed as visible in Fig. 3.

The omission of the longitudinal slots in the embodiment of Figs. 6 to 9 avoids the risk of distortion of the frame likely to determine the undesirable disengagement of the diapositive While the chain is being driven.

Since the resilient frame is made integral with the rigid stiffening plate, itself fixed with respect to the hinge pin, there is thus afforded an assembly unable to be distorted supports connected to one another by any suitable con-- necting means. The invention also applies to the mountingof diapositives by any means upon chains, cords, metallic or other, bands, which allow them of being traversed in front of the objective.

The articulation hinges may be replaced by any other device permitting a longitudinal fiexure or deformation of the chain. Use may be made for that purpose of a resilient or rigid articulated ribbon provided with Windows cut out for accommodating the diapositives.

As many changes could be made in the above construction, and many apparently widely different embodiments of this invention could be made Without departing from the scope of the claims, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

What I claim is:

l. Diapositive holder comprising a frame member adapted to receive a diapositive and support same by the peripheral portion thereof, said frame member being made of a flexible resilient material and having at least the central portion thereof made of tWo parallel Walls which leave a space therebetween, said space opening outwardly of said frame member through at least one side thereof in order to permit of inserting a diapositive into said frame .member and removing it thereout, said diapositive holder further comprising a fiat stiffener member located in said frame between said two walls, said stiffener member being formed with a central aperture at leastas. large as the .picture of the diapositives to be accommodated and having rigid therewith guiding lugs protruding laterally of said frame irnemberfor guiding same in slideways purposely provided in conventional luminous projection apparatus, and depending connecting means carried by said frame member adapted for pivotably con necting one such frame member to a'similar one whereby a number of similar frame members may be assembled into a chain-like formation.

2. Diapositive holder according to claim 1, wherein said stiffener member is insertable into said frame member between said two walls thereof.

3. In a diapositive carrier having a plurality of identical frames linked together in end to end relationship, a resilient rubber-like rectangular frame having a groove along the inner peripheral edge thereof for receiving and holding a diapositive, a stiffening plate in said frame having a central opening at least as large as the opening of said frame, said plate being provided with guiding lugs protruding laterally on two opposite sides of said frame for guiding said frame in conventional luminous projection apparatus, said frame having a boss protruding beyond a third'side thereof and having a bore parallel with said third side of said frame, a male element of hinge means formed by a pin engaged in said bore, and a corresponding female element of hinge means formed by a bore extending through said frame along the edge of the fourth side thereof, said fourth side being provided with a notch adapted to receive the boss of a further frame the pin of which is inserted in said female hinge means forming bore.

4. A diapositive carrier according to claim 3, wherein said stiffening plate is permanently embedded in said frame.

5. A diapositive carrier according to claim 3, wherein said stiffening plate is permanently embedded in said frame and is flush with one side of said groove of said frame.

6. A diapositive carrier according to claim 3, wherein said stiffening plate is embedded in said frame and is formed with a further lug embedded in said boss of said frame and rolled so as to form a metal layer between said pin and said bore of said frame boss.

7. A' diapositive carrier according to claim 3, wherein said groove of said frame opens out through at least one side of said frame.

8. A diapositive carrier according to claim 3, wherein said groove of said frame opens out through said third side of said frame under said boss.

Kugel Oct. 23, 1951 Olsen Feb. 19, 1952

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