US1140051A - Adjustable support or bracket for lamps, shades, mirrors, or the like. - Google Patents

Description

H. M. MACNAUGHTON-JONES.

ADJUSTABLE SUPPORT 0R BRACKET FOR LAMPS, SHADES, MIRRORS, OR THE LIKE. APPLICATION FILED AUG.27.1914.

1,140,051 Patented May18, 1915.

THE NORRIS PETERS CO4, .F'HOTO-LITHO" WASHINGTQN, D C.

HENRY MACNAUGHTON MACNAUGHTON-J ONES, F HAMPSTEAD,LON'DO1\T, ENGLAND. v

ADJUSTABLE SUPPORT 0R BRACKET FOR LAMPS, SHADES, MIRRORS, OR THE LIKE.

Patented May 18, 1915;

Application filed August 27, 1914. 7 Serial No. 858,834.

To all whom it may concern Be it known that I, HENRY MAoNAUeHroN MAoNAUGHToN-J ONES, subject of the Klng of Great Britain, residing at 521 Finchley" road, Hampstead, London, England, have invented certain new and useful Improvements in Adjustable Supports or Brackets for Lamps, Shades, lWirrors, or the like, and

of which the following is a specification.

This invention relates to supports or brackets for carrying lamps containing electric or gas lights, or for carrying shades, re-

' position to another. 1

The invention, hereafter more fully de:

scribed, consists of a structure which is 1 adapted to rotate around a supportlng pivot,

called hereafter the principal pivot. The

principal pivot connects the structure to a standard, pendant rod or bracket, so that the'structure is rotatable in its own plane. This structure has the lamp and counterweight'attached to it on opposite sides of the principal pivot, which is situated at the .center ofgravity ofthe whole. The struc-.

ture consists of rods 'or members hinged or pivoted together to form a parallelogram, or series of parallelograms.

If there be more than one parallelogram two of the adjacent sides of each are prolonged to form a cross, and the prolongan tions form two of the sides of the parallelo;

gram next to it. V

With such a construction theparallogram or parallelograms may be made to. assume a rectangular, diamond or other shape; but

during these changes the opposite sides re main parallehand in the case of a series "of parallelograms the sides of each remain parallel to the corresponding sides of each other parallelogram. f V 7 i To one of the members on one'side of the principal pivot a lampis attached,rand to a parallel vmember onthe other side of this pivot a counterweight is attached. The

members to which thelamp and counterweight are attached may exceed length the side of the parallelogram of which each forms a part, extending beyond thepoint' at which it is pivoted to the adjacent side,

and the lamp or counterweight may be attached. to it at its junction with this adjacent slde or to the extension beyond it. The

central pivot connects the structure to a j standard, pendantrod or bracket so that the structure, rotates in a vertical plane.

With such a construction the lamp may be moved in a straight line toward or away from the central. pivot, around which it may alsobe rotated vertically,[without destroy-t ing its balance.v As the lamp. moves toward or away fromthe' central pivot the counter weight is also brought automatically toward or away the counterweight falls.

In the construction of such apparatus," one of the members of the parallelogramj may have a tubular sleeve attached to it to receive within it a hollow receptacle which from it, and as the lamp rises can contain the requisite weight, say'of shot, 1 and can then be adjusted up or down the requisite position. V

The invention will be further and more through the tubular member and fixed in v particularly described with reference to the examples of construction shown in the ac-.

companying drawings, in which Figures 1, 2, 3 and 4 each show in tion an examplefofconstruction of appa ratus according tothis invention.

Referring to Fig. 1 of the drawings, the parallelogram structure consists of two parallel members 1. and2 connected at their elevaends to two other parallel members 3 and 4-. I

In this figure the member 3 is represented.

as the lamp-bearing member and the lamp 8. i V

is shown in dotted outline as attached to it at its junction, with member 2 andin solid outline to an extension 3? of member 3. The counterweight 9 is consequently shown as attached in a corresponding manner to mom-.

her 4, (the parallel member on the other :side of the principal pivot 5 at its junction with member 1 and to an extension 4? of member 4. In this figure 'twosecondary} members 11,12 are shown connecting the opposite sides of the parallelogram inorder' that the principal pivot may be central and.

the structure symmetrical. }Either of these two secondary members may however be omitted without affecting the structure, and by modifying the weight of the counterweight and the position at which it is at:

tached to member 4 or its extension P, the center" of gravity may be. made to pass through the member 2 and the central pivot pass through that member as shown at Fig. 4, in which case no such secondary members are necessary. In Fig. 1, as in all the drawings, the principal pivot 5 is represented as carried by a telescopic standard 6; but it may be carried by a pendant rod or bracket. The pivot maybe carried by a head 7 which itself revolves about the standard 6.

At Fig. 2 the structure is formed by a series of parallelograms, and two of the adjacent sides of each (13 and 14 of one parallelogram and 15 and 16 of the other) are prolonged to form a cross, and the prolongations form two of the sides of the parallelogram next to it. The members 3 and 4 as also 1 and 2 remain parallel in all their movements, as do the sides similarly numbered in Fig. 1, and to one of these the lamp is attached. In this Fig. 2 the member 3 is represented as the lamp-bearing member, and the lamp 8 is shown in dotted outline as attached to it at its junction with member 52, and in solid outline to an extension 3 of member 3. The counterweight is consequently shown as attached in a corresponding manner to member 4, (the parallel member on the other side of the principal pivot) at its junction with member 1, and to an extension 4 of the member 4.

In Fig. 4 the counterweight 9 is in the form of a tubular case containing shot, and is carried in a tubular sleeve 10 fixed to the member'4 of the parallelogram, so that its axis lies parallel to the said member. The weight 9 is adjustable within the sleeve 10 in the direction of the length of the said sleeve and therefore of the member 4, and is fixed in its adjusted position by a set screw 10? which passes through the said sleeve and contacts with the weight to clamp it in position. V

In accordance with the law of the resolution of force the single weight shown in Figs. 1 and 2 may be replaced by two or more weights having an equivalent value. In Fig. 3 a construction is shown in which it is replaced by two such weights 9.

It will be understood that instead of the arm or member 3 supporting the lamp extending in a straight line or coaxial with the member 3, it might be constructed at an angle thereto, and similarly the member 4 may be constructed at an angle to the member 4, and where gas is to be conducted through the system or where electric conductors or the like are to be carried and concealed, the members of the structuremay be tubular, all as will be well understood by those acquainted with the manufacture to which this invention relates.

What I claim as my invention and desire to secure by Letters Patent is 1. An adjustable support or bracket; comprising in combination a plurality of rigid members, pivotal connections between said members to form a parallelogram structure, a support for said structure, means for pivotally connecting the said structure to the said support so that the said structure is rotatable in its own plane, an article such as a lamp at one end of said structure, and means at the other end of said structure to counterbalance the weight of said lamp, substantially as set forth.

2. An adjustable support or bracket; comprising in combination a plurality of rigid members, pivotal connections between said members to form a parallelogram structure, a support for said structure, a pivotal connection between said structure and said support to enable said structure to be rotated and expanded and contracted in a vertical plane and also to be rotated in a direction at right angles to the plane containing the said structure, an article such as a lamp at one end of said structure, and means at the other end of said structure to counterbalance the weight of said lamp, substantially as set forth. I

3. An adjustable support or bracket; comprising in combination a plurality of rigid members, pivotal connections between said members to form a parallelogram structure, a support for said structure, a pivotal connection between said structure and said support so that said structure is rotatable in its own plane, an extension to the member at one end of said structure, an article such as a lamp connected to said extension, an extension to the parallel member at the other end of said structure, and a weight secured to said extension to counterbalance the weight of said lamp, substantially as set forth.

4. An adjustable support or bracket; comprising in combination a plurality of rigid members, pivotal connections between said members to form a parallelogram structure, a vertical tubular support, a head rotatably carried at the upper end of said support, a horizontal pivot pin passing through said structure at'right angles to the plane con taining the latter and entering said head so that the said structure is rotatable in its own plane, an article such as a lamp at one end of said structure, and means at the other end of said structure to counterbalance the weight of said lamp, substantially as set forth.

5. An adjustable support or bracket; comprising in combination a plurality of rigid members, pivotal connections between said members to form a parallelogram structure, a vertical tubular support, a head rotatably carried at the upper end of said support, a horizontal pivot pin passing through said structure at right angles to the plane containing the latter said pin entering said head and forming means upon which said parallelogram structure can be rotated and counterbalance the weight of said lamp, subexpanded and contracted in the plane constantially as set forth. 10 taining the same, an extension to the mem- In witness whereof I have hereunto sether at one end of said structure, an article my hand in the presence of two witnesses.

such as a lamp connected to said extension, HENRY MAGNAUGHTON MAGNAUGHTON-JONES.- an extension to the opposite and parallel Witnesses:

member at the other end of said'structure, THOMAS W. ROGERS,

and a weight secured to said extension to WILLIAM R. MARSHALL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. G.

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