US739585A

US739585A - Camera-front.

Info

Publication number: US739585A
Application number: US16677202A
Authority: US
Inventors: Frank B Case
Original assignee: Individual
Current assignee: Individual
Priority date: 1902-12-11
Filing date: 1902-12-11
Publication date: 1903-09-22
Anticipated expiration: 1920-09-22

Description

No. 739,585. PATBNTED SEPT. 22, 1903. F. B. CASE.

CAMERA FRONT.

LIPLIOATION FILED no. 11. 1902. RENEWED JULY 2a, 1903.

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PATENT OFFICE.

CAM ERA-FRONT.

SPECIFICATION forming part of Letters Patent N o. 739,585,'d'ated September 22, 1903.

Application filed December 11,1902. Renewed July 23, 1903. Serial No. 166,772. (No model.)

To aZZ whom it may concern.-

Be it known that I, FRANK B. CASE, a citizen of the United States, residing at Rochester, in the county of Monroe and State of New York, have invented an Improved Camera- Front, of which the following is a specification.

This invention relates to photographic-camera fronts of that class in which the front board or board carrying the lens is arranged to be adjusted vertically between its supporting-standards, and relates more especially to the means for effecting such adjustments, the object being to provide a more efficient and economical means for securing the front board in any desired position of vertical adjustment between its supporting-standards.

The accompanying drawings, illustrating a camera-front embodying my invention,are as follows:

Figure l is a face view of a camera-front a and supporting-standards b b, the standard I) being cut away enough to show the location and the arrangement of the clamping-screw e and nut d. Fig.2 is a sectional view taken along the dotted line as y in Fig. l with all parts above such line removed. Fig. 3 is'an enlarged detailview of the groovein the standard b and shows the inner end of the nut d as it is located in the groove in such standard I). Fig. l is a vertical sectional view of parts seen in Fig. 3 taken along the axis of the screw e. Fig. 5 is an enlarged sectional view of part of the front board a and standard 1), taken along the dotted line 00 y of Fig. 1 with all parts above such line removed.

Referring to Figs. 1 and 2, the support for the front board consists of the base-piece f, supporting from its ends the two vertical standards b b, grooved longitudinally on their inner edges and connected together at their upper ends by the piece 0. The front board a has formed on its edges the tongues a and a arranged to slide in the grooves in the pieces 6 and b. The construction of all of the parts thus far described is common in cameras.

Located in the standard I) and about mid- Way between its ends is seen a threaded busl1 ing or nut cl, in which a thumb-screw c is arranged to turn, so that its inner end will press against the edge of the tongue a when such screw 6 is turned in the usual way. The

bushing consists, as will be seen more clearly in Figs. 3, 4, and 5, of a cylindrical body-piece d, from the inner end of which extend two radial projections d (21, so formed as to fit in the groove deepened therefor in the standard b. Thus it will be seen that it is only necessary to bore a hole through the standard Z) as large as the body of the nut or bushing and then to insert such bushing or nut (Z in the grooved side of the standard I) with the projections 01' d in such groove and then to turn in the screw 6. As shown in Fig. 5, the groove in the standard I) is deeper at the center than the projection of the tongue a from the body of the front board a by an amount somewhat in excess of the thickness of the projections d d.

In order to prevent the screw 6 from jamming the edge of the tongue a a strip of metal a is let into such tongue a as indicated in Figs. 1, 2, and 5, so that the screw 6 bottoms against it.

It will be noticed that when the front board a is secured in any desired position by the bushing. d and screw 6 that such bushing is pressed all the more firmly against the standard 19 instead of being separated from such standard I), as is the tendency in the ordinary construction.

What I claim is- 1. In a camera, a grooved member and a tongued member cooperating therewith, a bushing in such grooved member, such bushing having formed thereon projections engaging the groove in such grooved member, and ascrew workingin such bushing and arranged to bottom against such tongued member.

2. In a camera, a grooved member and a tongued member cooperating therewith, a threaded bushing in such grooved member having projections thereon engaging such groove, the groove in such grooved member deeper than the projecting tongue of the member cooperating therewith by about the thickness of the projections on such bushing, and a screw working in such bushing and bottoming against the tongue on such tongued member.

FRANK 13. CASE.

Witnesses:

ALBERT G. BELL, A. PEARL Moons.