US606394A - sharretts - Google Patents

Description

(N0 ModeL) 2 SheetsSheet 1. D. E. SHARRETTS.

FOGUS'ING ATTACHMENT FOR'GAMER AS.

No. 606,394. Patented June 28,1898.

Witme 000 (No Model.)

2 SheetsSheet 2' D. E. SHARRETTS. FOGUSING ATTACHMENT FOR CAMERAS.

Patented June 28, 1898.

Unurnn Starts PATENT @rrrcn.

DAVID E. SIIARRETTS, OF \(VASIIINGTON, DISTRICT OF COLUMBIA ASSIGNCR OF ONE IIALF TO CHARLES E. KLOEBER, JR, OF SAME PLACE.

FOCUSING ATTACHMENT FUR CAMERAS.

SPECIFICATION forming part of Letters Patent No. 606,394, dated June 28, 1898.

Application filed October 28, 1897 T all whom, it may concern:

Be it known that I, DAVID E. SHARRETTS, a citizen of the United States, residing at WVashington, in the District of Columbia, have invented certain new and useful Improvements in Camera Attachments; and I do declare the following to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains to make no and use the same, reference being had to the accompanying drawings,and to the figures of reference marked thereon, which form a part of this specification. I

It has been common in the art of photogra- I 5 phy to use an erecting-reflector pivoted to the ground-glass frame, so as to allow the reflector to be tilted toward and from the ground glass for the purpose of varying the angle of deflection and making the image upon the ground glass appear in its natural and proper position.

The object of my invention is to so construct and arrange such pivoted reflector that it can not only be tilted, but so that its axis 2 5 can be moved up or down across the face of the ground glass in order to allow a wider range of adjustment and by this means bring into view of the operator the portions of the image desired, as required by the varying 3o quantity of light and shade thrown upon the different sections of the ground glass, and to greatly facilitate the focusing operation.

A further object of my device is to mount the reflector so that it will perform these f unctions whether turned into a horizontal or a vertical position. I

In the drawings, Figure 1 represents a perspective view of my improved reflector applied to an ordinary ground-glass frame arranged for taking horizontal pictures. Dotted lines show the reflector adjusted to a higher position and a different angle, as in the act of focusing. Fig. 2 represents aperspective view of the reflector and groundglass frame turned around in position to observe a vertical image. Fig. 3 is a perspective view of the reflector and frames in vertical position to better illustrate their mechanism and to show their relation to each other; and

Serial No. 656,652. (No model.)

Figs. at and 5 are detail views of the reflectorhangers the slides and their immediate parts adjusted to different positions.

The reference-numeral 1 denotes an ordinary ground-glass frame to which my improvements are applied. The reflector 2 is set in a frame 3, which for convenience will be termed a vertical frame, because it is used for erecting vertical pictures. This frame is set in and flush with an outer frame 4, which will be called a horizontal frame, because it is used for taking such pictures. These two frames constitute a 'compound frame adapted to be moved as one on two pivots 5 at the lower corners of the frame 4. These pivots are set in sliding bearings 6, movable up and down between the guide-bars 7 and 8, the latter being fastened to the ground-glass frame 1 by screws 9. In order to increase the friction of the bearings upon the guide-bars and thereby prevent them from sliding too freely, a leaf or plate spring 17 is interposed between the bearings and the bars and acts as a brake. This spring is formed in the shape of an arch, the crown of which is fastened to the bearing, and its opposite ends are bent out laterally to form runners, Which engage and slide over the surface of the inner guide-bar 7.

The free end of the reflector-frame is ad- 3' ustably supported in angular relation to the ground glass by two flat metal hangers 12, having their outer ends pivotally attached to the opposite sides of the outer frame at and their inner ends pivotally attached to sliding runners 13, the latter being provided with brake-springs 12 for producing frictionlike those on the pivot-bearings 6. The frictional pressure between these runners 13 and the guide-bars must be suflicient to prevent the weight of the free end of the tilted reflector and frame from overcoming it, yet not be enough to prevent the runners from sliding with facility when the operator oscillates the free end of the frame with his hand. By this means the frame can be tilted back and forth and slid up and down and will remain at any desired point of adjustment without having to manipulate screws or other fastening de vices. The foregoing description relates to the reflector and its adjusting mechanism when used for horizontal pictures.

The means for taking vertical pictures will nowbe described. The inner frame 3 is pivoted in the outer frame i, and its pivots 13' operate in sliding bearings 14:, which move between guide-bars 15 and 16 and are provided with springs 17 for the purpose of holding them in close frictional contact with the bars. As these bearin gs are exactly like those for the outer or horizontal frame no further description will be necessary. Two flat metal hangers 18, also like those for the horizontal frame, with their outer ends pivotally attached to the opposite sides of the frame 3 and their inner ends to sliding runners 19, support the free end of the frame at various points of angular adjustment in relation to the ground glass in precisely the same manner in which the horizontal frame is supported. 130th frames are held closed by springcatches 20 and 21, preferably located at the top of each.

Briefly the operation of my device is as follows: In taking a horizontal picture the catch 20 is first released. The operator then pulls out the top of the frame the required distance from the ground glass to permit the erected object to be seen from above. A still liner adjustment of the object to the view can be had by raising or lowering the pivotal point of the frame. This can be done by sliding the pivot-bearings 0 between the guide-bars 7 and 8 until the required point is reached. Afterward the frame may he slid down until the bearings reach the bottom of the groove between the guide-bars and then shut up flat against the groundglass frame and so held by the catch 20.

If a vertical picture is to be taken, the whole ground-glass frame and the compound reflector-frame are turned around into vertical position. The inner frame should now be released and its upper free end swung out on the pivots and oscillated back and forth or slid up or down to secure the required ad jus'tment to properly observe the image, the operation being exactly like that just described for taking horizontal pictures. The inner frame closes flush with the outer frame, and the two form a compact and. simple attaehment which lies flat against the back of. the groi'ind-glass frame when out of use.

Having thus described my invention, what I claim as new, and desire to seen re by Letters Patent, is

1. In a camera attaclnnent, a ground glass frame having an oblong reflector provided with pivots disposed at right angles to each other, whereby either vertical or horizontal pictures may be erected, substantiall y as described.

23. In a camera attachment, a groi'nul-glass frame provided with a compound reflectorframe having pivots disposed at right angles to each other whereby the reflector is capable of tilting horizontally or vertically, substantially as described.

3. In a camera attachment, the combiinttion with a ground-glass frame, of an oblong reflector pivoted in an inner frame, said reflector havingits pivots operating in an outer frame and said outer frame having pivots disposed at right angles to those of the inner frame and confined in sliding hearings on the ground-glass frame, substantially as de scribed.

l. In a camera attachment, the combina tion with a ground glass, of a reflector provided with movable pivots, whereby the re Hector can be moved up and down before the face of the ground glass, and its free end moved toward and away from the latter, substantially as described.

In witness whereof I aflix my signati'lro in presence of two witnesses.

DAVID E. SllAltltlC'VlS.

Nitnesses:

(/IIAS. E. Knonnnn, J12,

t. G. DU 1301s.

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