US2107124A - Adjustable stand - Google Patents

Description

Feb 1, 1938;

J. MARKER? I ADJUSTABLE STAND Filed June 11, 1936 INVENTOR.

ATTORNEY.

Patented Feb. 1, 1938 UNITED STATES PATENT OFFICE 2,107,124 ADJUSTABLE STAND This invention relates to an adjustable stand. The object of the invention is the production of a stand, by means of which a table, electric light bulb or other objects can be maintained at different inclinations.

The second object of the invention is the production of a stand having a table which can be easily collapsed.

Other objects will be evident from the specification and drawing.

In the drawing Fig. 1 represents an elevation with portions in vertical section of an exemplification of the adjustable stand with a table; Fig. 2 shows a partial left hand side view of Fig. 1; Fig. 3 indicates a top view of Fig. l on a reduced scale; Fig. 4 represents an elevation of a clamping plug; Fig. 5 is a top view of Fig. 4; Fig. 6 indicates an elevation of the clamping sleeve; Fig. 7 is a top view of Fig. 6; Fig. 8 shows an elevation of a modified clamping sleeve with its adjacent elements; Fig. 9 shows a top view of the locking sleeve indicated in Fig. 8; Fig. 10 represents a fragmentary portion of the stand partly in section with a modification; and Fig. 11 shows an elevation on a reduced scale of the stand supporting an electric light bulb.

Referring to Figs. 1 to '7 inclusive, the adjustable stand in this instance comprises the follow- A lower outer tube 20 is indicated with the tapered upper end 2|, and its lower end is supported in the foot 22. An upper and inner supporting tube 23 having the outer thread 24 at its upper end telescopes with the lower tube 20. An operating handle 25 extends through the tube 23.

An adjustable tubular locking sleeve 30, in this. instance having a cylindrical body portion, is shown with its upper end 3| at right angles to its longitudinal axis and with the tapered lower face 32 inclined to said axis. The inner edge of the upper end is shown at 33. The face 32 is shown with the oval opening 34 having the tapered curved edge 35 at its upper end. The lower portion of the face 32 is indicated with the tapered lower end 36.

A T shaped fitting is indicated with the cylindrical longitudinal portion 38 from which extends the cross member 39, having the interior thread 40, and the latter is in threaded engagement with the thread 24.

A cylindrical supporting shaft 4| is indicated with the ends 42 somewhat smaller in diameter. The shaft 4| is rotatively supported in the T shaped fitting. A locking plug 44 is shown with the upper tubular portion 45.

New York, N. Y.

1936, Serial No. 84,613

The latter in its upper face has formed therewith the gripping edges 46 with the valleys 41 between them. A stem 48 extends from the tubular portion 45 and is secured thereto by the pin 49. The lower end of the tubular portion 45 bears upon the top end of the tube 23, and the stem 48 extends into the said tube.

A table 50 is indicated with the adjustable front stop plate 5|. The latter is normally positioned in a vertical plane against the front end of the table as indicated in Figs. 1 and 2, to avoid an opening between said table and stop plate. Hinges 54 pivotally connect the stop plate 5| to the table 50. Each of said hinges comprises the bottom member 56 and the member 5'3 at right angles thereto. The members 55 are fastened to the sides of the table 50, by the screws 59, and the pivot screws 60 pivot the stop plate 5| to the hinges 54. The stop plate 5| may be positioned parallel tothe table 50 and bear on the same.

To the lower face of the table 50 are fastened a pair of journal brackets 65, by the screws 56, and support the ends 42 of the supporting shaft 4|. Screws 6'! clamp the ends 42 in different positions.

Referring to Figs. 8 and 9 a modification of the locking sleeve 30 is indicated at 68. The locking sleeve 68 comprises a body portion square in shape and having the upper end 69 perpendicular to its longitudinal axis and the tapered lower face"). The lower outer tubeis indicated at 1| and the upper and inner supporting tube is shown at 12. The tubes are square in cross section and telescope with each other.

Referring to Fig. 10 with its modification, the table is again indicated at 5|] with its front stop plate 5| and. the hinges 54. In this instance the stop plate 5| has been swung to bear upon the upper face of the table 50 so that it can be easily shipped without injury thereto. The cylindrical longitudinal portion of the fitting is again shown at 38, with its cross member 39 having the interior thread 40 and the latter is again in threaded engagement with the thread 24 of the upper tube 23. The operating handle for the tube 23 is again shown at 25. The upper end of the tube 23 is counterbored at 15. In the said counterbore is tightly positioned the cylindrical washer l5 and the latter supports the clamping disc ll of flexible material, which may be leather. The upper face of the disc 11 extends above the upper end of the tube 23. The cylindrical supporting shaft is again shown at 4| with its ends 42. The shaft 4| is again rotatively supported in the T shaped fitting having the longitudinal portion 38. The journal brackets for the ends 42 are again shown at 65 with their clamping screws 61.

Referring to the modification indicated in Fig. 11, the invention is applied to the stand'for an electric light bulb. A foot is indicated at 85, which supports the outer tube 28. The upper supporting tube is again shown at 23 with'the collar 23a at its upper end. The adjustable looking sleeve is again shown at 38. From the collar 23a, extends the usual flexible support 88 for an electric bulb 89. A coil 98 for electric current leads through the .support 88 to the electric light bulb 89. r

To raise the table 58 to different levels, the upper supporting tube 23 is grasped and raised to position the table at the desired level, and the tube 23 is then released. The locking sleeve 38 will permit the tube 23 to be raised without grasping said sleeve. When the tube 23 is released the locking sleeve 30 will automatically drop into 7 locked position with the tubes and 23, as indicated in Fig. 1. When thesleeve 30 drops into its locking position, its. lower face 36 bears on the tapered upper end 2| of the tube 28, and thereby said sleeve 38 is tilted in position, as shown in Fig. 1. When the locking sleeve 30 is in its locked position, a portion of the inner edge 33 of its upper end 3| pinches theadjacent portion of the supporting tube 23, and atthe same time the upper tapered curved edge 35 of the opening 34 pinches the opposite side of the tube 23 to lock the latter in position.

To lower the table 58 the locking sleeve 38 is separated from the lower tube 28 and the table is lowered to the desired level and the locking sleeve 38 is allowed to drop to its locked position.

To position the table indicated inFig. 1 in 'diftube 23, by means. of which the gripping edges 46' of the locking plug 44 are forced to pinch the supporting shaft 4|, and the table 58 is locked in operative position.

Referring to Fig. 10, to tilt the table to differe'nt positions, the upper supporting tube 23 is turned by means of the operating handle 25, to lower the clamping disc 11 from the supporting shaft 4|. The table 58 is then tilted to the required position and thenthetube'23 is turned in the opposite direction, to position the clamping disc 11. tightly against the shaft 4!.

Referring to Fig. 11, the electric light bulb 88 is raised by raising the tube 23 and looking it in position by means of the tubular locking sleeve 38, as already described. 7

Attentionis called to the fact'that the locking sleeves indicated at 38 and 68, do not require to be cylindrical or square in cross-section, but may be various other shapes.

Various other 'modlfications may be made in w the invention, and the present exemplifications are to be taken as illustrative'and not limitative thereof.

Having described my invention, I claim:

7 1. In a stand the combination of a tube, a T shaped fitting comprising a longitudinal portion and a cross member, the upper end of the tube extending into said cross member, means to vary the extent of the entrance of the tube into said cross member, a supporting shaft rotatively supported in the longitudinal portion of the fitting, means coacting with the upper end of the tube to detachably clamp the supporting shaft and a table supported by said supporting shaft.

2. In a stand the combination of a tube, a T shaped fitting comprising a longitudinal portion and a cross member, the upper end of the tube extending into said cross member, means to vary the extent of the entrance of the upper tube into'said cross imember, a supporting'shaft rotatively supported in the longitudinal portion of the fitting, a clamping disc supported at the upper end of the tube adapted to bear against the supporting shaft, to detachably maintain the same in fixed position, and a table supported-by said supporting shaft.

' 3. In a stand the combination of a tube, a T shaped fitting comprising a longitudinal portion'and a cross member, the upper end of ,the'

tube extending into the said cross member, in adjustable locked relation thereto, means to vary the extent of the entrance of the upper tube into said cross member, a supporting shaft rotatively supported in the longitudinal portion of the fitting, a locking plug supported on the upper end of the tube adapted to pinch'the'supporting shaft, a pair of journal brackets adjustably fastened to the ends of the supporting shaft, and a table supported on said journal brackets.

4. In a stand the combination of a tube, a T shaped fitting comprising a longitudinalportion and a cross member, the'cross member havferent tilted positions, the operating handle 25 ing an interior thread, the latter thread in engagement with the thread .of the tube, means to" turn the tube to Vary the extent of the entrance of the thread at the upper end of the tube into the cross member of said fitting, a supporting shaft rotatively supported in the longitudinal portion of the T shaped fitting, 'a locking plug supported at the upper end ofthe uppe'r tube adapted to pinch and hold-in fixed position the supporting shaft, when the tube is turned toth'e requisite position, a pair of journal brackets detachably fastened to the supporting shaft and a table supported on the journal brackets.

5. In a stand-the combination 'of a tube, a

thread at the upper outer face of thejupper end of the tube, a T shaped fitting comprising a'longitudinal portion and a cross member having an portion, gripping edges integral withttheupp'e'r face of the upper portion, a stem extending from a the upper portion of the locking plug, said upper portion bearing on the upper end of thei'tub'e and said stem extending 'into said tube, means to turn said tube to vary the extent of its'entrance into said cross member, the gripping-edges of said plug adapted to pinch the 'supporting' between said shaft and said table.

shaft, a table, and supporting means interposed JOHN MARKElRtT.

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