US702018A - Camera-support. - Google Patents

Description

Patented lune I0, |902.

.w. "AQ MAnBAcH. cAmEA suPPoBT.

(Appxieion mea nu. 2, 190x.)

(lo Model.)

' In ventor,

i f h UNITED STATES WILLIAM A. MARBACH,

PATENT OFFICE.

OF CLEVELAND, OHIO.

CAM ERA-SUPPO RT.

SPECIFICATION forming part of Letters Patent N o. 702,018, dated .T une 10, 1902.

Application led March 2, 1901.

To all whom it may concern:

Be it known that I, WILLIAM A. MAsBAcH, a citizen of the United States, and a resident of Cleveland, count-y of Cuyahoga, and State of Ohio, have invented a new and useful Improvement in Camera-Supports, of which the following is a specification, the principle of the invention being herein explained and the best Inode in which I have contemplated applying that principle, so as to distinguish it from other inventions.

My inventionv relates to supports, and particularly t0 tripods for supporting cameras, its object being to provide a tripod of the most economical construction combined with lightness and compactness.l

Said invention consists of 'means hereinafter fully described, and particularly pointed out in the claims.

The annexed drawings and the following. description-set forth in detail certain means embodying the invention, such disclosed means constituting but one of various mechanical forms in which the principle of the invention may be lused.

In said annexed drawings, Figure I representsV a front elevation'of a tripod embodying my invention. Fig. II represents ank enlarged vertical axial cross-section of the tripod-' head, showing parts connected therewith in elevation. Fig. III represents a longitudinal cross-section of a portion of one tripodleg on an enlarged scale; and Fig. IV represents a transverse section of such leg on the same scale, showing the thumb-screw in elevation therein.

Each leg A of the tripod is formed of two members a and a', formed with registering vlongitudinal slots a2 and a3, respectively, the. one being slidable within Vthe other, sofas to form a telescoping structure. Each such slot is flanked by lateral longitudinal fianges and a5, respectively, the outer surfaces of thev flanges a5 of the inner member o. contacting the inner surfaces .of the iianges a4 of the outer member, as shown in Fig. IV. 'Opposite slot d3 in member a and upon the outside thereof. is formed a longitudinal bead a6, which is located and slides in a longitudinal groove a7, formed upon the inner surface of member a', thereby maintaining the correct relative positions of the two members during Serial No. 49,573. (No model.)

the movement of one within the other, preventing binding of such members, and forming strengthening-ribs for stiffeningthe structure by increasing the cross-section in the direction of iiexure. These members are preferably formed by pressing, during which process the bead a6 may. be formed by pressing a groove upon the inside of member a and abead upon the outside of member mas shown. The cross-section of such'members is prefer-` ably made U-shaped, as shown, such form being especially devoid of 4liability to binding and being readily formed by such pressing process. t l

Upon the lower end of each outer member a. is secured, by brazingor riveting, a bridge b, provided with a centralpopenin g b, through which freely passes a thumb-screw B, whose inner extremity engages a nutbfthe lateral portions of whose upper surface engage a portion of the lower surface of the fianges a5 of the inner member. Such structure constitutes a clamp for iixing the inner and outer members and preventing longitudinal movement relatively to each other, which is effected by drawing the nut up against the flanges a5, thereby effecting frctional engagement between such two members sufficient to prevent such longitudinal movement'. Said nut is provided with an inwardly-extending lug b3, which is located in the line of thepath of movement of an outwardly-extending lug as, formed in the upper end of the inner member or', as shown in Fig. III. The contact of the two lugs limits the outward movement of such inner member and prevents. the two members from becoming detached from each other.

The head of the tripod' is formed with a surface c being concave, as shown in Fig. II, forming one member of a universal joint. The middle of such surface is inter-seated by an enlarged opening c2, through which extends a thumb-screw D, whose upper end en- Vmember C, formed with lugs c, to which the legs are suitably hinged, the upper central gages a thread formed in the bottom E of the thread `on the thumb-screw. This construction is well known and permits the screw to be loose in the head, is prevented from dropping out, and may be detached. Said member C is formed with a convex surface c, seated in the concave surface c. Intermediately of a shoulderclformed upon said screw D and the contiguous head-surface is located a spring disk F, which normally presses against both head and shoulder and maintains sufficient frictional contact in the joint to prevent undue movement of the camera upon the head when the thumb-screw is not tightly fastened. Such frictional contact permits of the adjustment of the cameras position upon the tripod before the camera is finally and tixedly secured thereon.

Other modes of applying the principle of my invention may be employed instead of the one explained, change being made as regards the mechanism herein disclosed, provided the means stated by any one of the following claims or the equivalent of such stated means be employed.

I therefore particularly point out and distinctly claim as my inventionl. In a support, a leg comprising in its construction two telescoping members slidable one within the other and each provided with a longitudinal slot, such slots being located upon the same side of the leg, and means for adjustably securing such members to each other.

2. In a camera-support, a leg comprising in its construction two telescoping members slidable one within the other and each provided with a longitudinal slot, such slots being located upon the same side of the leg, each member of said leg having a longitudinal bead, and means for adjustably securing such members together.

3. A camera-support comprising a plurality of legs each of which consists of two members slidable one within the other and each provided with a longitudinal slot, such slots being located upon the same side of the leg, a bridge secured to the lower end of each outer member, a thumb-screw passing through the bridge, a nut provided with a lug, a lug on the inner member of each leg, said thumbscrew engaging `the n ut, substantially as described.

Signed by me this 21st day of February,

WM.. A. MARBACII. Attest:

D. T. DAvIEs, A. E. MERKEL.

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