US275631A

US275631A - Easel

Info

Publication number: US275631A
Authority: US
Publication date: 1883-04-10
Anticipated expiration: 1900-04-10

Description

(No Model.)

I. s. FROST.

EASEL. I

' Patented Apr. 10,1883.

WlTNEEEEE UNITED STATES PATENT OFFICE.

FRANCIS S. FROST, OF ARLINGTON, MASSACHUSETTS.

EAS EL.

SPECIFICATION forming part of Letters Patent No. 275,631, dated April 10, 1883. Application filed February 17, 1883. (No model.)

To all whom it may concern:

Be it known that I, FRANCIS S.FROsT, a citizen of the United States, residing at Arlington, in the county of Middlesex and State of Massachusetts, have invented certain Improvements in Easels, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, making part of this specification, in which Figure 1 is a front elevation of an easel having my improvement applied thereto. Fig. 2 is a rear elevation of. the shelf and its clamping and guiding mechanism enlarged, Fig.3 is a horizontal section on the line 00 a: of Fig. 2. Fig. 4. is a perspective view of the clamping device detached. Fig. 5 is a vertical section-on the line 3/ y of Fig.3. Fig. 6is a horizontal section on the line 2 z of Fig. 2.

My invention has for its object to provide a simple and convenient device for guiding the shelf or picture-support upon the center bar of an easel and firmly fastening it at any desired height thereon; and my invention consists in a pair of guides or clasps pivoted to the shelf and adapted to slide upon the center bar or post against which they are clamped, to hold the shelf in any desired position, by the action of a looped lever or bail pivoted to the guides and adapted to wedge or force them toward each other against the center bar when depressed by thehand ,as hereinafter described.

My invention also consists in certain details of construction, as hereinafter set forth and specifically claimed.

In the said drawings,A A represent the side pieces, and B the center bar or post, of the front portion or frame of an easel, connected together, as usual, by cross-bars a b.

O is the movable shelf or picture-support, within a recess, d, at the back of which are pivoted, at e e, two metallic guides or clasps, D D, each provided with a lip or flange, j, which fits into and slides in a groove, 9, in the side of the central post, B, thus holding the shelf 0 upon the post B, and allowing itto be moved up and down thereon.

To the outer sides of the-guides D D are pivoted, at h, the ends of a looped lever or bail, G, the inner surfaces, i t, of which fit closely against theinclined outer surfaces, k k, of the guides D, the action of the leverGbeing such that when raised, as seen in Fig. 4, it will permit the guides to separate to their greatest extent, when they will slide freely upon the post B and allow the shelf 0 to be adjusted to any desired position, while the depression of the lever G by the hand into the position seen in Figs. 1, 2, and 5 will cause the lower ends of the guides D to be wedged or forced toward each other and clamped firmly against the opposite sides of the post B, thus holding the shelf 0 firmly and immovably in any position in which it may be set, and preventing it from wabbling or tipping down at either end.

The inner surfaces, i i, of the lever G and the outer surfaces, k k, of the guides D may both be made inclined or of wedge form, or one straight and the other inclined, as preferred; but the surfaces in contact must be so formed and'adapted to each other that the depression of the lever will cause the lower ends of the guides to approach each other and be thereby clamped against the post B.

When the back lof the shelf 0 is of considerable height, an additional guiding-clamp,

H, Figs. 2 and 6, having flanges fitting into the grooves g g, may be employed, if desired, to keep the top of the back I close to the post B when a heavy picture is placed upon the shelf.

The above-described clamping device is simple, cheap, and not liable to get out of order, and is adapted for use either in'upright or sloping easels.

Instead of the guides D being constructed to slide in groovesg in the post B, as shown, they may wholly embrace the two opposite sides of the post, in which case the flanges f would extend over onto the rear side of the post.

What I claim as myinvention, and desire to secure by Letters Patent, is-

1. In an ease], the combination, with the movable shelf 0 and center post, B, of the guides or clasps D D, pivoted to the shelf and adapted to slide upon the post, and the looped lever or bail G, pivoted to the guides D, and adapted to clamp the same upon the post B,

allcoustrueted to operate substantially as and l on the post, substantially in the manner and 10 for the purpose set forth. for the purpose described.

2. In an easel, the combination, with the E \Vitness my hand this 13th dayof February, movable shelf (J and center post, 13, of the A.D.18S3. guides or olusps D D, pivoted to the shelf, and 1 having flanges or lips f, sliding in grooves g l in the post, and the looped lever or ball G, piv- 1 oted to the guides D, and adapted to Wedge or force them toward each other and clamp them 1 FRANCIS S. FROST.

In presence (if-- P. E. TESCHEMACHER, W. J. CAMBRIDGE.