US739834A - Camera-shutter. - Google Patents

Description

No. 739,834. PTENTED SEPT. 29, 1903.

F. V. 6r K. B. GONLEY. I

CAMERA SHUTTER.

APPLIUATIOI FILED SEPT. 29. 1902.

Na'jeaeeli.

`llrFElD4 ,c STATES u atented September 29, 1903:.

PATENT OFFICE FREDERICK VICTOR CONLEY AND KERRY LLSWORTH CONLEY, OF SPRINGVALLEY, AMINNESOTA.

CAM ERA-SHUTTER.

SPECIFIC ATIONforming part of Letters Patent No. 739,834, dated September 2.9, 1903.

Application filed September 29,1902.- Serial No. 125.286.4 (No model.)

To @ZZ whom, t may con/cern,.-

Beit known that we, FREDERICK VICTOR CONLEY and KERRY ELLsWoRTH CONLEY, citizens of the United States, residing at Springvalley, in the county of Fillmore and State of Minnesota, have invented a new and useful Camera-Shutter, of which the fellowing is a specification.

This invention relates to camera-shutters.

The object of' the invention is in a ready, simple, cheap, and thoroughly eicient manner and without necessity of change in the structural arrangement of cameras in use to obviate noise in the opening and closing of the blades and any jarring or vibration ofthe plate with danger of spoilage thereof, to provide for the positive opening and closing of therblades, to prevent entrance of light into the camera when the blades are closed, and to provide for taking up lost motion and wear in any of the movable parts of the device.

Vith these and other objects in view, as will appear as the nature of the invention is better understood, the same consists in the novel construction and combination of parts of a camera-shutter, as will be hereinafter fully described and claimed.

In the accompanying drawings, forming a part of this specification, and in which like numerals of reference indicate corresponding parts, there is illustrated one form of embodiment of the invention capable of carrying the same into practical operation, it being understood that the elements therein exhibited may be varied or changed as to shape, proportion, and exact manner of assemblage without departing from the spirit thereof, and in these drawings- Figure 1 is a view in elevation of a camerashutter constructed in accordance with the present invention. Fig. 2 is a view in horizontal section taken on the line 2 2.of Fig. 1. Fig. 3 is a sectional detail view of the adjusting mechanism for the blade-actuating link or lever. Fig. 4 is a sectional detail view of the adjustable conebearing of the bladecarrying shafts.

The arrangement shown in the present case is an improvement upon a camera-shutter filed by us in the United States Patent Oliice lens-board of an ordinary camera-box, having the usual lens-orifice 2, back of which 1s secured a plate 3, having an orifice 4, the inner face of the plate being covered with felt or cloth 5, as usual, to effect a light-proof juncture with the blades 6, which may be of the common or any preferred construction. The plate 3 has secured to it at its upper and lower edges strips 7, constitutinglight.guards,which operate to preclude entrance of light to the camera when the blades are closed. The terminals of the light-guards 7 are slotted at 8 to receive the intermediate portions of the bladecarrying shafts 9 and 10, respectively, with which the blades 6 are connected in any approved manner. As above stated, one of the objects of this invention is to take up wear of the moving parts of the apparatus, thereby to insure positive and thoroughly effective operation under all conditionsin use. Owing to the nicety with which the blades must coact to presentalight-proof juncture it will be obvious that the journals of their shafts must always run true in their bearings; otherwise where lost motion is present there will be danger of spoilage of plates by entrance of light. To eiect the` above adjustment, the terminals of the shafts are made conical, as shown at 11 in Fig. 4, and work in bearings 12, carried by ledges 13, secured near the upper and lower ends of the lens-board, the bearings being threaded to permit of proper adjustment and being provided with cone-sockets 14 to receive the cone ends of the shafts. It will be seen that by turning the bearings 12 any lost motion or wear ofthe shaft-terminals may readily be taken up.

The shaft 9 carries near its lowerV end a crank 15, projecting toward the lens-board, and the shaft 10 a similar crank 16, projecting outward from the lens-board, and connecting these cranks is a link 17, which operates in the well-known manner to transmit motion from the actuated shaft 9 to the shaft 10.

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board, and passing through the free ends of these cranks is a pin 19, to one end of which is connected one terminal of a coiled spring 20, the other terminal of which is secured to the lens-board at 21, the function of this spring being normally to hold the blades closed. Connecting with the other end of the pin 19 is one end of a rod 22, the other en d being suitably secured to a bulb 23, which by being inilated operates instantly to open the blades against the tension of the spring 20 and upon deflation, through the medium of a suction-bulb 24, in conjunction with the spring, to close them. The bulb 23 is supported by a bracket 25, secured to the lens-board, and has connected with it in any preferred manner one end of a flexible tubing 26, the other end of which connects with the suction-bulb above referred to.

From long-continued use of the device the pins 27 on the cranks l5 and 16 will become worn or the openings in the link engaged by the pins will wear oblong, so that accurate opening and closing of the blades cannot be effected. To obviate this defect, the openings 28 in the ends of the link through which the pins project are oblong, as shown in Fig. 3, and the link is provided with two other oblong openings 29 forthe reception of screws 30, which engage adjustable bearing-plates 31, mounted on the pins vand held associated therewith by collars 32. It will be seen that as the pin-receiving openings in the bearingplates wear by loosening the screws 30 and moving the said plates outward such lost motion can be taken up. This feature while simple is of importance and will materially increase the life of the apparatus and will render the employment of skilled labor for purposes of repairs of this part unnecessary.

From the foregoing description it will be seen that provision is made for securing and maintaining accurate adjustment of al1 of the movable parts of the device, and the manner in which this is accomplished is at once simple and thoroughly efficient.

Having thus described the invention, what we claim as new is 1. The combination with the shaft of a shutter-blade, of cranks carried thereby and provided with pins, a link having terminal oriices engaging the pins, adjustable bearingplates carried by the link and engaged by the pins, and adjustable bearings for the terminals of the said shaft.

2. The combination with the shaftof ashutter-blade, of cranks carried thereby and provided with pins, a link having terminal orifices engaging the pins, and adjustable bear ing-plates carried by the link engaged by the' pins. j

3. The combination with the shaft of a shutter-blade, of cranks carried thereby and provided with pins, a link having oblong orilices engaging the pins, and adjustable bearingplates carried by the link and having orifices engaged by the pins.

4f. The combination with the shaft of ashutter-blade, of a pair of cranks rigid therewith, a pin passing through the terminals of the cranks, a blade-opening bulb operatively connected with one terminal ofthe pin, and a blade-closing spring connected with the other terminal thereof.

5. The combination with a pair of shutterblades, of a light-guard disposed above and below the same and provided with terminal recesses, bladesupporting shafts having their intermediate portions disposed in the recesses, and means for rotating the shafts.

In testimony that we claim the foregoing as our own we have hereto affixed our signatures in the presence ot' two witnesses.

FREDERICK VICTOR CONLEY.

KERRY ELLSWOR'll-l CONLEY. Witnesses:

EARNEST H. LAEssiG,

F. V. EDWARDS.

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