US1257624A

US1257624A - Photographic shutter.

Info

Publication number: US1257624A
Application number: US11162116A
Authority: US
Inventors: Paul J Marke
Original assignee: Eastman Kodak Co
Current assignee: Eastman Kodak Co
Priority date: 1916-07-27
Filing date: 1916-07-27
Publication date: 1918-02-26
Anticipated expiration: 1935-02-26

Description

P. 1. MARKS.

PHOTOGRAPH? SHUTTER.

APPLICATION FILED JULY 27. 1916.

1,257,624. Patented Feb. 26,1918.

his ATTORNEYS s'rATEs PATENT omen.

PAUL J. MARKS, OI ROCHESTER, NEW YORK, ASSIGNOB T0 EASTMAN KODAK COKPAKY,

OF ROCHESTER, NEW

YORK, A CORPORATION OF NEW YORK.

To all whom it-may concern:

Be it known that I, PAUL J. MARKS, of Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Photographic Shutters; and I do hereby declare the followin to be a full, clear, and exact description 0 the same, reference being had to the accompanying drawin forming a part of this specification, an to the reference numerals marked thereon.

My present invention relates to photography and more particularly to photographic shutters and it has for its object to provide a simple, efficient and convenient shutter of the professional t pe which are used largely by professional p otographers in connection more particularly with studio apparatus. The shutter is designed for use in instances in which lens capping would otherwise be employed and the improvements are directed in part toward providing a quick acting shutter for timed exposures of the construction permitting it to be readily placed under the control of the usual flexible operating device. To these and other ends the invention resides in certain improvements and combinations of parts all as will be hereinafter more fully described, the novel features being pointed out in the claims at the end of the specification.

In the drawings: I

Figure '1 is a front elevation of the shutter in closed position with the cover of the casing removed;

ig. 2 is a similar view showing the shutter open;

Fig. 3 is an enlarged horizontal section taken substantially on the line 3-3 of Fig. 1;

ig. 4 is an enlarged detail section through the stud connecting an actuating lever with the shutter curtain, and

Fig. 5 is an enlarged detail section through the pivot of an actuatinglever.

Similar reference numerals throughout the several views indicate the same parts.

The shutter mechamsm is carried within the shutter case 1 having a cover 2 which latter and "the casing are provided with registering openings 3 and 4 constituting the shutter aperture. Two

shutter members

5 and 6 are provided to open and close the shutter aperture and each comprises a folding flexible curtain preferably made of light Specification of Letters Patent.

Application flied July 27, 1

Patented Feb. 26, 1 918.

916. sermno. 111,021.

rubber cloth. One end of the curtain in each instance is fixed to the casing 1 at one side of the opening 4 and for this purpose,

its edge may be held within a bindinglstrip 7 fastened down by screws 8 Theo or or free end of the curtain is,= in each instance, provided with a stiffening plate 9 over which the margin of the cloth is doubled and riveted in or otherwise secured in the plates are

pivot studs

10 and 10, the former being best shown in Fig. 4. The said ivot studs are journaled in sleeves 11v an 11 riveted to the outer ends of actuating levers 12 12, respectively, and the stud is held in the sleeve, in each instance, by a confining screw 13 threaded in the stud and engaging the opposite face of the lever.

he levers 12 and 12 are oppositely acting and are removably carried on pivot studs 14,-, riveted in the casing 1 at 15, as shown in Fig. 5. The levers are provided with sleeves 16 secured thereto by screws 17 which engage over the studs 1i and are held thereon by confining screws 18. The levers have a normal tendency to move toward each other and draw the

curtains

5 and 6 across the shutter aperture 4 under the influence of a spring 19 connecting them. For the purpose of opening the curtains, as shown in Fig. 2, the lever 12 is provided on the lower side of its pivot with an extension arm 20 projecting through an L-shaped slot 21 in a side wall of the casing 1. The said arm 20 is notched at 22 to form a hook with which may be engaged a loop on the end of a flexible operating cable 23 of a familiar type housed within a tube 24 having a collar 25 held in a clip 26 on the casing 1. It will be seen that as the cable 23 is pulled, it will rock the lever 12 to which it is attached, to the left and draw back the flexible curtain 5. This movement is also communicated to the other lever 12 through the medium of a connecting rod 27 having one end pivoted at 28 below the pivot of lever 12 and the other end pivoted at 29 to lever 12 above its pivot.

The curtains or shutter members close under the action of the spring 19 which normally' holds them closed and are opene against its tension by pulling on the cable 23 and holding it so that the levers Will be separated as in Fig. 2 for the desired period through which the shutter is to remain open. The size Of he casing 1 is such that 110 the

curtains

5 and 6 have room to fold clear of the aperture 4 as shown in Fig. 2 and being very light and flexible, they adapt themselves to the space afforded. The

studs

10 and 10 by means of which the levers are connected to the stifl'ening devices 9 of the curtain, are made long enough to substantially offset the general plane of the curtain on the one hand, from the general plane of the levers, on the other, so that the two pairs of devices will work free of each other and the stud 10 is longer than the stud 10 to bring the curtain 6 into overlapping relationship with the curtain 5. when closed, overlap each other at the1r stifi edges, as shown in Fig. 3 and the said pivotal connection may act as stops for limiting their movement toward each other, although this movement, if desired, may be limited by the lengths of the curtains themselves. In any event, the curtains should be substantially flat when closed by being drawn taut or nearly taut which causes the stiffened edges at their outer ends to come parallel with each other.

1 claim as my invention 1. In a photographic shutter, the combination with a shutter casing having an aperture and a folding flexible curtain having one end fixed to the casing at one side of the shutter aperture, of an actuator on the casing connected to the other end of the cur tain to move it across the aperture.

2. In a photographic shutter, the combina tion with a shutter casing having an aperture and a folding flexible curtain having one end fixed to the casing at one side of the shutter aperture and a stiffening device at the opposite free end, of an actuator on the casing connected to said last mentioned end of the curtain to move it back and forth across the aperture.

3. In a photographic shutter, the combination with a shutter casing having an aperture and a folding flexible curtain having one end fixed to the casing at one side of the shutter aperture and a stiflening device at the other free end, of an actuating lever on the casing pivoted to the stiflening device to move the curtain back and forth across the aperture.

4. In a photographic shutter, the combination with a shutter casing having an aper- The curtains ture and a foldin flexible curtain havin one end fixed to t e casing at one side 0 65 the shutter aperture and a stiffening device at the other free end, of an actuating lever on the casing and a stud projecting there from and connected to the stiffening device to form a pivot bearing for the curtain ofi set from the lever through the medium of which the curtain may be operated back and forth across the aperture.

5. In a photographic shutter, the combination with a shutter casing having an aperture and a pair of folding flexible curtains each having one end fixed to the casin at one side of the shutter aperture and a sti ening device at the other free end, of a pair of oppositely acting actuating levers on the casing connected to the respective free ends of the curtains, a spring connecting the levers to cause them to normally close the curtain together across the aperture and op erating means for spreading the levers and folding the curtains 'at the sides of the aperture.

(3. In a photographic shutter, the combination with a shutter casing having an aperture and a pair of folding flexible curtains each having one end fixed at one side of the shutter aperture, and a stiffening device at the other free end, of an actuating lever for each curtain mounted on the casing, and a. stud projecting from each lever and connected to the stiflening device of its respec tive curtain so that the general plane of the curtains and that of the levers are relatively offset, the levers being oppositely acting and one of the studs being adapted to act as a stop with which the stifl'ening device 01" the other curtain cooperates to limit the movement of the curtains toward each other as they pass across the aperture to close it.

7 In a photographic shutter, the combination with a shutter casing having an aperture and a flexible curtain having a free end adapted to move back and forth across the shutter aperture, of an actuating lever on the casing connected to such free end of the 100 curtain.

PAUL J. MARKS.

Witnesses:

M. JOSEPH SULLIVAN, EDITH WATERSTRAAT.