Counterpoised bracket.

A. F. PIEPER.

COUNTERPOISED BRACKET.

APPLICATION FILED MAE. 4, 1912.

1,070,525»

Patented Aug. 19,1913.

<img file="US1070525A_D0001.tif" />

<img file="US1070525A_D0002.tif" />

<img file="US1070525A_D0003.tif" />

<img file="US1070525A_D0004.tif" />

Alton»

- COLUMBIA PLANOGRAPH CO., WASHINGTON. D. C.

UNITED STATES PATENT OFFICE.

ALPHONSE F. PIEPER, OF ROCHESTER, NEW YORK.

COUNTERPOISED BRACKET.

1,070,535. Specification of Letters Patent. Patented Aug’. 19,1913.

Application, filed March 4, 1912. Serial No. 681,386.

To all whom it may concern:

Be it known that I, Alphonse F. Pieper, of Rochester, in the county of Monroe and State of Nett⁷ York, have invented certain new and useful Improvements in Counterpoised Brackets; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specification, and to the reference-numerals marked thereon.

My present invention has for its object to provide an adjustable bracket adapted to be extended, or retracted, by moving outwardly or inwardly relatively to its support, and which will in all positions of adjustment be perfectly counterpoised.

To these and other ends the invention consists in certain improvements and combinations of parts all as will be hereinafter more fully described, the novel features being pointed out in the claims at the encl of the specification.

Tn the drawings: Figure 1 is a side elevation of a bracket constructed in accordance with my invention; Fig. 2 is a detail enlarged view showing the connection between the inner and outer sections; Fig. 3 is a side elevation thereof; and Fig. 4 is a cross sectional view taken on the line A—A of Fig. 3.

Similar reference numerals throughout the several figures indicate the same parts.

A bracket constructed in accordance with my invention is adapted particularly for use in supporting the trays for holding the instruments used by dentists, or for supporting the tool cabinets in which such instruments are usually contained, and the general arrangement of the parts is such that the sections of the bracket may be drawn forwardly or moved outwardly away from their support and held counterpoised in any position of adjustment.

In carrying out my invention I provide a bracket composed of two sections, one a Avail section the other, the outer or extensible section. The Avail section is connected to the holder 1 attached to a Avail or other support, and having the outwardly extending arms 2 forming journals carrying the horizontally revoluble head 3 to which is pivotally connected the vertically adjustable arms or rods 4 and 4^a. The outer or extensible section of the bracket comprises the arms 5 and 5^a also connected for pivotal movement and joined at their outer ends by the member 6 Avhich may carry the tray, cabinet or other object Avhich it is desired to support on the bracket.

Connection between the two members of 60 the bracket is effected by the member 7, and to stiffen the structure against twisting or torsional strains I make said member with separate side plates, as shoAvn in Fig. 3, and I further provide each arm of both pairs of 65 arms Avith bifurcated ends which overlie the side plates of tlie member and are connected thereto by the pivot pins 4^b—4^C and 5”—5°, thus affording great stability at the joints. The arms are all preferably straight and the 70 pivots 4^C and 5^C are arranged out of vertical alinement with the pivots 4^b and 5^b, and also separated a greater distance to permit the several arms to lie in parallel lines and edge to edge when folded together, as shown 75 in Figs. 2 and 4.

Equilateral movement of the Iavo pairs of arms relatively to the connecting plate 7 is obtained by means of a controlling connection in the form of a pair of links 40 and 50, 80 pivoted together at 51, and guided for vertical movement on the member 7. In the illustrations, the member 7 is shown as provided with guide slots in Avhich are mounted small blocks carrying the ends of the pm 51. 85 The outer ends of the links are connected, one to each pair of arms 4—4^a and 5—5^a, the pivotal points being preferably macle with the lower arms, the link 40 being journaled on the arm 4^a by the pin 40^a, and the link 50 90 similarly attached to the arm 5^a by the pin 50^a. These pins 40.^a and 50^a are also positioned between the bifurcations of said arms and between the side pieces of the member 7 so that they are completely housed when 95 the bracket is in closed or folded position.

When the bracket is in extended position a severe strain or twisting action Avould be imparted to the pin 51 if it should be supported only at one end, or if the links should 1°° be held in but one guide, and this strain is relieved by carrying the two ends of the pins in the guides in the side plates of the member 7. The arrangement of the parts in the manner shoAvn completely conceals the links ¹⁰⁵Avhen the bracket is collapsed, and when it is extended they are partly hidden, and by reason of the position they occupy they are practically unnoticeable.

Where the nature of the object to be sup- HO ported will permit its being suspended or held in other than one position in all posi

1,070,525 tions of adjustment of the bracket, the outer or extensible section may only comprise the lower member the extremity of which may be extended as shown in dotted lines as a means of suspending objects.