US2497580A - Adjustable photographer's posing chair - Google Patents

Description

Feb. 14, 1950 ADJUSTABLE Filed March 24, 1945 C. M. BRIGGS PHOTOGRAPHER "s POSING CHAIR 2': Sheets-Sheet l Inventor Feb. 14, 1950 c. M. BRIGGS 2,497,580

ADJUSTABLE PHOTOGRAPHER'S POSING CHAIR Filed March 24, 1945 5 Sheets-Sheet 2 Inventor Feb. 14, 1950 c. M. BRIGGS 2,497,580

ADJUSTABLE PHOTOGRAPHERS POSING CHAIR Filed March 24,1945 I s Sheets-Sheet s Irwenlor 2mm awn Wave; 19m

Patented F eb. 14 1950 Claude'M. Briggs; Elk Gity, Okla., assignor oi. onethird to John Overton Shaw, 'Elk Gity Okla.

Application March 24, 1945 Serial Nor-584,625-

This invention relates to a photographers posing chair, and one of the objects of the invention is to provide means for quickly adjusting the seat to various elevations, which will be positive in its 'operation, and not interfere with the free turning of the seat.

Another object of the invention is to provide a head or arm rest supporting bar, arranged to 'slide in vertical guides, and a simple quick operating means for locking the-bar in any position it is adjusted to.

; A still further object of the invention is to provide a posing chair for photographers, which can be also adapted to accommodate persons' of sitions.

With the above and other objects in view, the invention relates to certain new and useful constructions, combinations and arrangements of parts, clearly illustrated in the accompanying drawings, and fully described in the following specification. In the drawings:

Fig. 1 is a side elevation.

Fig. 2 is a side elevation of the seat.

Fig. 3 is a cross sectional View, taken on line 3-3 of Fig. 2, looking in the direction of the arrows.

Fig. 4 is a bottom plan view of the seat.

Fig. 5 is a bottom plan view showing the clutch for holding the seat post in vertically adjusted position.

Fig. 6 is a side elevation thereof, showing the seat post broken away for convenience of illustration.

Fig. 7 is a detail side elevation, showing the clutch and mounting for adjustably supporting the back or head rest bar.

Fig. 8 is a detail bottom plan view thereof.

Referring to the accompanying drawings, which illustrate the practical application of the invention, 5 designates a series of chair legs, which are connected at their upper ends to the top 6, and by the brace board 1 intermediate of their upper and lower ends. On the top 6 a metal bearing ring plate 8 is secured.

A round or cylindrical seat post 9 is slidable through the top 6 and through the brace board 1. This seat post is vertically adjusted by means of the clutch plate Ill, which is hingedly connected at H to the leaf or plate l2, attached directly to the underside of the brace board 1, by the screws I 3. The hole Illa of 'the clutch plate 10 is somewhat larger than the post, so

the brace board.

that the clutch platefmay be tilted downward y under the. brace board "I, and in order to hold the clutch plate -I D in clutchingposition, a spreader plate or member I4 pivoted at I'M. to the underside of the brace board and is adapted to be swung under the brace board to maintain the clutch plate or leaf I0 in tilted relatiohto On the upper end of .the seat post 9 a roller bearing head I5 is arranged, and on this head the customer seatv top [6 is mounted, so that it turns with a minimum of friction. A'rubber cushion or buffer ringSa is placedaroundthe seat post 9 below the roller bearing head I5, 50 as to cushion the seat when itis dropped to its lowest position against the lower chair-top l5. vAnother rubber ring or b'uiier 9b is secured to the lower end of the seat post, to cushion the post when it is raised to its highest position.

When the clutch plate It is in inclined or tilted relation, it has a clutching action on the round seat post, as the lowermost and uppermost edges of the post opening or hole I0a are forced into pressure engagement with the sides of the post, due to the tilting action of the plate l0 against the post, which is held to its normal vertical plane by the bearings of the top 6 and. the brace board. By forcing the outer end of the plate l0 upwardly, the seat post may be freely shifted upwardly or downwardly, to change the elevation of the seat top Hi.

The seat top [6 is equipped with parallel guide bars 11 and l8, and on the bar H a metal strip Ila is secured, so that the inner edges of this strip project inwardly of the inner side of the bar, and on the bar l8 the metal strip I 8a is secured, and its inner edge projects inwardly of the inner edge of the bar I8. These bars and strips are arranged in spacedparallel relation to each other. These guide bars and strips are located outwardly of the center of the seat top l6, and spaced apart sufiiciently to receive the horizontal bar l9, which together with the vertical bar 29, and the diagonal brace 2|, forms a horizontal sliding frame for the vertically adjustable head or head rest bar 22. The ends of the vertical frame bar 29 are provided with metal plates as and 24, which are secured thereto by screws- 25, and these plates engage the sides of the bar 22.

An angle bar 26 is secured to the horizontal bar l9, and on the outer ends of the angle bar 26 the inner ends of the screw threaded rods 21 and 28 are coupled by the nuts 29. On the outer ends of the rods 21 and 28 the clutch bar 30 is rigidly connected. The rods 21 and 28 are normally tiltedso that the frictional pressure of the head rest bar 22 against the inner side of the clutch bar 30 will cause the bar 30 to swing inwardly, thereby increasing the pressure developed between the meeting surfaces of the bar 22 and the bar 20, and preventing downward movement of the head rest bar 22.

The bar 22 may be equipped with a rest 3| which may be adjusted to support the head, arm. or back of the user. To prevent the horizontal bar H] from becoming detached from the seat top l6,.a stop pin 33is secured to the metal strip Ila, and is engaged by the cross angle bar 26, as indicated in Fig. 1, when the angle bar reaches the limit of its horizontal travel. The normal friction between the sliding bar I9 and the bars or guides l1 and I8 and their plates is suflicient to prevent accidental sliding of the rest on the chair top I6.

By lifting the clutch bar 30 the sliding rest supporting bar 22 may be freely adjusted upwardly or downwardly. When the bar 30 is allowed to return to its normal inclined position, the friction of the sliding bar 22 on the bar 30 will increase the pressure of the clutch bar.

The adjustment of the chair post and. its top seat is made without the delay usually required for the operation of a jack screw, and the same is true of the vertical adjustment of the rest bar.

It is understood that various changes in the details of construction, their arrangement and combination, may be resorted to, within the Having described my invention, I claim as new:

A posing chair, comprising legs, a top supported tilting of the plate away-from the brace board,

and a member pivoted to the brace board and adapted to swing between the plate and brace board to maintain the plate in clutching engagement with the post, whereby the post will be effectively prevented from longitudinal sliding movement, and a seat mounted on the upper end of the seat post.

' CLAUDE M. BRIGGS.

l REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 94,387 Briggs Aug. 31, 1869 234,360 Hoffman Dec. 14, 1880 252,980 Tonk et a1 Jan. 31, 1882 376,016 Stuck Jan. '3, 1888 829,888 -Pyle Aug. 28, 1906 1,132,407 Taylor Mar. 16, 1915 1,184,801 Watkins May 30, 1916 1,357,826 Shaw Nov. 2, 1920 1,435,627 Uhl Nov. 14, 1922 1,606,840 Koenigkramery Nov. 16, 1926 1,674,081 -Adams June 19, 1928 1,701,273 Pipp Feb. 5, 1929 1 1,932,618 Gabb Oct. 31, 1933 1,984,549 Rowland Dec. 18, 1934

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