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Publication numberUS641748 A
Publication typeGrant
Publication dateJan 23, 1900
Filing dateFeb 20, 1899
Priority dateFeb 20, 1899
Publication numberUS 641748 A, US 641748A, US-A-641748, US641748 A, US641748A
InventorsTheodore Smith
Original AssigneeTheodore Smith
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Adjustable bracket.
US 641748 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

Patented Jan. 23, I900.

A ncatibn flied Feb. 20, 1899.\

3 Shuts-Sheet (No Model.)

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(Application filed Feb. 20, 1899.)

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No. 64|,748. Patented Ian. 23, I900. T. SMITH.


(Application filed Feb. 20, 1899.) (No Model.) 3 Shasta-Shut 3.



SPECIFIGATION-forining part of Letters Patent No. 641,748, dated. January 23, 1900.

Application filed February 20,1899. Serial No. 706,139. (No model.)

To all whom it may concern.-

Be it known that I, THEODORE SMITH, a citizen of the United States of America, residing at Georgetown, in the county of Vermilion and State of .Illinois, have invented certain new and useful Improvements in Adjustable Brackets, of which the following is a specifi cation.

My invention relates to certain impr0vements in adjustable brackets designed especially for the supporting of electric lamps, the purpose being to provide a bracket having an easy universal adjustment as to position at its free end and a convenient means of attachment to any ordinary support at its fixed end.

To such purpose the invention consists in certain novel characteristics which will appear in their preferred specific embodiment in the drawings and in the accompanying specification and the essential features of which will be pointed out in the appended claims.

In the drawings, Figure 1 is a perspective view of the complete apparatus in its preferred form. Fig. 2 is a side elevation of a portion of the same with one of the knuckles in vertical longitudinal section. Fig. 3 is a horizontal section in line 3 3 of Fig. 2. Fig. 4 is a similar section in line 4 4. of Fig.2. Fig. 5 is a side elevation of the bracket shown in connection with a clamp for attaching it to a shelf, table, or similar device. Fig. 6 is a vertical longitudinal section in line 6 6 of Fig. 8. Fig. 7 is an end view of the clamp shown in Fig. 5 looking in the direction of the arrow 7. Fig. 8 is a plan view of the parts shown in Fig. 5, the post being in crosssection and the line of section being taken at 8 8 in Fig. 5. Fig. 9 is a side elevation of the bracket shown in connection with the wall-bracket and a horizontal swinging arm. Fig. 10 is a plan view of the wall-bracket, and Fig. 11 is a side View of the bracket hung directly upon a wall-bracket similar to the one shown in Fig. 10.

Referring to Figs. 1 to 4, inclusive, A is a preferably weighted base provided with a central opening a, adapted to receive a support-- that side provided with a clamping-screw a to either clamp the boss about the post B.or to take up any lost motion caused by the wear of the parts.

The post B is preferably of sufficient height to give a considerable vertical range of movement, and a clamp O is provided for attachment to the post, said clamp having substantially parallel perforations c c, the former being adapted to receive the post and the lat- 'ter to receive a downwardly-bent 'end d of a horizontal swinging arm D, and a clampingsorew c being provided to tighten the clamp upon the post. To permit of this, the clamp is split, as seen at c.- The outer end of the arm D is turned upward and receives a clamping-block E, provided with a vertical perforation 6 to receive the end of said arm D, and slit radially of said perforation, as seen at e, to permit of the tightening of the block upon the arm D. A clamping-screw e is provided for this purpose. Said block E has two preferably horizontal perforations e e and hori zontal slits e 6 extending from said perforations to the outer surface of the block. A clamping screw e extends through both of these horizontal slits, bearing upon the outside surface of the block at one end and threaded in the portion thereof beyond the slit upon the opposite side, so that the tightening of the screw draws the walls of both horizontal perforations together with equal tension. In these horizontal perforations are held the bent ends of two vertically-swinging rods F F, the opposite ends of which are also bent into horizontal lines and extend into two clamping-blocks G G, spaced apart by an intermediate clamp H, through all of which extends a clamping-screw I. The blocks G G are slit horizontally in planes passing through the perforations which receive the rods F F, and the intermediate clamp H is also slit horizontally and has a horizontal perforation h, in which is pivoted a laterally-extending pivot j upon a clip J, adapted to receive an ordinary lamp-socket K. The clamping-screw I bears upon the outer side of the upper block G and is threaded in the under side of the block G, so that it tends to draw the slit portions of the three clamps together, giving a friction-bearing upon both of the rods F F to hold the lamp at any elevation, a similar bearing upon the intermediate clamp H slightly resisting the horizontal oscillation of said clamp upon the clamping-screw, and therefore holding the lamp in any position reached by swinging it upon this pivot. The drawing of the split portions of the clamp H together binds them about the pivot j, holding the lamp in any position reached by vertical oscillation upon this pivot.

Referring to Figs. 5, 6, 7, and 8, modifications are there shown both of the base and of the clamp at the inner ends of the rods F F. The modifications in the base are intended to provide means for utilizing any suitable fixed object, as a shelf, counter, desk, or indeed almost anything to which an ordinary clamp can be applied.

M is a clamp of ordinary construction, except that it has a longitudinal and two lateral perforations at right angles to each other. The longitudinal perforation is seen at m, a lateral perforation at m, and a transverse lateral perforation at m The clamp is split longitudinally and substantially midway between its opposite sides, and a clamping-screw m is provided for drawing said opposite sides together. The lower portion of the clamp is not slit and acts as a sort of hinge, so that when the upper portions are brought together the two parts of the perforation m are thrown slightly out of line, which serves the purpose of clamping the supporting-postin these perforations. The bringing of the two sides of the clamp together tightens them upon the post in either'of the other perforations. The clamp for securing the inner ends of the rods F F to the post B is composed of three blocks N N N the blocks N N being similar to the blocks G G, and the block N being held between the two in a manner similar to the clamp H of Fig. 2 by a screw n. The clamp N, however, has a vertical perforation n, a slit n passing through the perforation, and a horizontal clamping-screw n for drawing the opposite sides of the slit together upon the post B.

Figs. 9 and 10 show a wall-bracket O, adapted to be secured to the wall P by means of two screws 0 o. Said bracket has a vertical perforation 0 a slit through the same 0 and a clamping-screw 0 The bracket is intended to receive the horizontal oscillating arm D. (Shown in Figs. 1 and 2.)

Fig. 11 shows a wall-bracket Q, provided with similar means of attachment to a wall and also with a vertical perforation q,adapted to receive the clamping-screw n of Figs. 5 and 6, thus arranging the swinging arms F F in a substantially vertical plane.

Considerable variation in form and arrangement of the various parts above described is possible without departing from the essential features thereof. I do not, therefore, limit myself to the exact form, arrangement, construction, or combination above specifically described.

I claim as new and desire to secure by Letters Patent- 1. In a device of the class described, the combination with a suitable support, of a removable post supported therein, means for clamping the post in said support,a verticallyadjustable block provided with means for clamping it to the post, an arm pivoted at one end to said block upon a vertical pivot and swinging in a horizontal plane, a block pivoted to the other end of said arm upon a vertical pivot, and swinging in a horizontal plane, a series of arms pivoted upon horizontal pivots to said second block at one end and swinging upon said pivots in vertical planes, a block pivoted to the opposite ends of said series of arms upon horizontal pivots, means for clamping said series of arms against oscillation upon their pivots, a block pivoted to said third block upon a vertical pivot and means for the attachment of a lamp-socket pivoted to said fourth block upon a horizontal pivot; substantially as described.

2. In a joint, the combination with a block having a plurality of perforations and slits upon one side of each of said perforations, of two or more members having pivotal portions in said perforations and a clamping device bearing upon the outer sides of the outside slit portions and thereby tendingto contract all of the perforations upon the pivots; substantially as described.

3. In a joint, the combination with two blocks having substantially parallel perforations and slits extending from one side of the same, of two members having pivotal portions in said perforations, an intermediate block, and a clamping-screw passing through the three blocks and bearing upon the outside of the slit blocks, whereby the screw contracts the slit blocks upon the pivotal portions of the two members, clamps them upon the intermediate block and acts asa pivot for said intermediate block; substantially as described.

4. In a joint, the combination with ablock having two series of perforations, the perfo rations of each series being substantially parallel and the perforations of the two series being substantially at right angles to each other and each perforation being slit upon one side, of clamping-screws for each series and pivoted members having pivotal portions in said perforations; substantially as described.

5. The combination with a clamping-block having a slit and two perforations, one in the plane of the slit and one intersecting said slit, of a post fitted to both of said perforations and means for clamping the opposite sides of the slit toward each other to contract one of said perforations and throw the two portions of the other out of line; substantially as described.

6. The combination with a post adapted thereto of a clamping-block having two perforations at right angles and a slit through one and transverse to the other, said block being provided with a clamping device for drawing the opposite sides of the slit together, thereby contracting the perforation in the slit and throwing out of line the two portions of the transverse perforation; substantially as described.

7. The combination with a post, of a universal clamping-block therefor provided with means for conveniently fastening it upon a suitable object, said clamping-block having three perforations, two of which are in the same plane and any one of which is at right angles to both of the others, slit through two of the perforations and transverse to the other and a clamping-screw for drawing the opposite sides of the slit together, contracting the perforations in the slit and throwing out of THEODORE SMITH. Witnesses:


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2489650 *Nov 21, 1946Nov 29, 1949Landrum Wiley AllenAdjustable lamp support
US2614204 *Nov 22, 1948Oct 14, 1952Earl L CanfieldDesk lighting unit and work surface
US2856816 *Mar 21, 1955Oct 21, 1958Happich Gmbh GebrRear view mirror mounting means
US2936726 *Apr 24, 1956May 17, 1960Ebenhard S GandrudStructure for mounting auxiliary apparatus on agricultural implements
US3020798 *Sep 17, 1957Feb 13, 1962Chrisman Charles MProjection advertising
US3185838 *Mar 6, 1963May 25, 1965Warshawsky JeromeFriction controlled slidable and rotatable mounting for lamps
US3426190 *Nov 7, 1966Feb 4, 1969P N Luminous Equipment CoSupport arms for lamps and the like
US4471410 *May 6, 1982Sep 11, 1984Honda Giken Kogyo Kabushiki KaishaRetractable headlight apparatus for motorcar
US4793582 *Jul 12, 1982Dec 27, 1988Benjamin BronsteinRear view mirror extension device
US4905944 *Jan 26, 1989Mar 6, 1990Baxter International Inc.Home care intravenous stand
US5333103 *Nov 20, 1991Jul 26, 1994Luxo Lamp CorporationHalogen lamp
US5477443 *Sep 30, 1994Dec 19, 1995Luxo Lamp CorporationHalogen lamp
US6264349 *Jan 12, 2000Jul 24, 2001Howard G. MorterAdjustable lamp
US8955905 *Jun 7, 2013Feb 17, 2015Neutral Posture, Inc.Seating assembly having a seat-mounted attachment assembly for adjustable extension arm
US20140361584 *Jun 7, 2013Dec 11, 2014Neutral Posture, Inc.Seating Assembly Having A Seat-Mounted Attachment Assembly For Adjustable Extension Arm
CN100522568CMay 21, 2004Aug 5, 2009莱斯特加工技术公司Process and device for welding through a mask moving plastic sheets with laser beams
WO1990008492A1 *Jan 17, 1990Aug 9, 1990Baxter International Inc.Home care intravenous stand
Cooperative ClassificationF16M11/12