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Publication numberUS63633 A
Publication typeGrant
Publication dateApr 9, 1867
Publication numberUS 63633 A, US 63633A, US-A-63633, US63633 A, US63633A
InventorsJohn Ha Worth
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
John ha worth-
US 63633 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

@uiten gisten gstellt ffizn.

JOHN HAWORTH, oF rniiNKroRD, PENNSYLVANIA.

Letters Patent No. 63,633, dated April 9, 1867.

IMPROVEMENT IN PHOTOGRAPHIG CAMERA STANDS.

TO ALL WHOM II MAY OONCERN:

Be it known that I, JOHN I-I'AWORTH, of Frankford, in the county of Philadelphia, and State of Pennsylvania, have invented a new and useful Improvementin Camera Stands; and I do hereby declare that the following is afull and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

The nature of my invention and improvement consists in combining and arranging ra-tchets and pawls with adjustable uprights of camera stands in such a manner that one of the uprights may be moved while the other is at rest, alternately, so as to produce the various changes necessary for the adjustment of the camera with but little labor, and yet expeditiously.

The construction and operation of the improved stand will be understood by the following description. In the accompanying drawings-Y Figure I is a perspective view of the improved stand.

-Figure2 is a vertical section ofthe same.

Figure 3 is a perspectiveview of one of the pawls F.

Like Letters inall the gures indicate the same parts.

A is a pillar, which is supported by the base B. C C are adjustable upright-s, which slide in corresponding openings in the pillar A. There is a strip, D, on one side of the pillar, adjustable by means of screws, to compensate for the wear of the uprights. EE are ratchets sunk in the faces of the uprights, and F F are right and left pawls, whose catches or teeth, a a, catch under the teeth b b of the ratchets, the teeth ends of the pawls being spread apart by means of the contracting spring Gr, which is connected at its ends with the outer ends ofthe pawls, as seen in iig. I, and thelatter working on Vthe fulcruin pins c c. I-I is a lever, which has a reciprocating movement, having a partial turn on the pin d, which passes vertically through its rear end, and is screwed fast into the upper end of the pillar A. The object of the lever is to disconnect the pawls from the ratchets, as may be necessary' for the adjustment of the board I, on which the camera is placed, which board is joined to the uprights by means of the hinges J.

The operation is as follows: When the operator wishes to adjust his camera., if the board I yis too low, hc takes hold of the front end with both hands and produces an alternate movement'upwards, the pawls preventing the descent of the uprights with which they are respectively connected, so that the loft-hand uprightshall remain at rest while the right-hand one is elevated, and vice versa. When the board is to be lowered the saine action of the pawls takes place, the uprights being alternately lowered until itis brought into its proper position. The pawls are disconnected by the use ofV the lever H, which may be brought at pleasure to bear against the inner projection e e of the former. In both the up and down movements of the uprights C C, their upper ends being out to the bevel represented in the drawings, so as to bear against the board I, the alternate movements are arrested at the maximum distance which it may answer to go without joining the uprights.

Having thus described my improvement in camera stands, what I claim therein as new, and desire to' Secure by Letters Patent, isv

1. The combination ofthe board I, uprights C C, ratchets E E, pawls F F, and pillar A, the several parts being constructed and arranged in relation to each other substantially as described and for the purposes specified. 2. The combination and arrangement of the spring G, and lever H, with the pawls F F, substantially as and for the purposes set forth. Y

vIn testimony that the above is my invention I have hereunto set my-hand and aflixed myseal this 25th day of August, 1866.

JOHN HAWORTH. [L Witnesses:

STEPHEN Usrrox, J oHN WHITE.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5313892 *Oct 21, 1991May 24, 1994Tice William ATable with height and tilt adjust
US6135032 *Apr 12, 1999Oct 24, 2000Ko; Wen-ShanComputer desk having ascendible and descendible desk tops
Classifications
Cooperative ClassificationA47B27/02