US154068A - Improvement in perspective-drawing apparatus - Google Patents

Description

` A. MORSE.

Perspective Drawing Apparatus.

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THE GRAPHKC CB. FHDTDTHJQ 5144-! PARK PLACEJLY.

Patented Aug.11,137'4.

UNITED STATES PATENT OFFICE.

ANDREW MoEsE, or skowHEGAN, MAINE.

Y IMPROVEMENT IN PERSPECTIVE-DRAWING APPARATUS.

Specification forming part of Letters Patent No. 151,068, dated ugust 11, 1874 application filed June 22,1874.

Toall whom it may concern:

Be it iknown' that I, ANDREW MORSE, of Skowhegan, in the county of Somerset and State'ofMaine, have invented an Improved Apparatus for Drawing Perspectives, of which.

theffollowing is a specication:

Myinvention consists in the combination of an arm-rest, a sight-beam, a pencil-holder, a guide, and a drawing-board, all the parts being adjustable and arranged and operating in the manner and for the purpose hereinafter particularly described and set forth.

In the accompanying drawing, Figure 1 is a sideviewof my improved apparatus. Fig. 2 is a top view. Fig. 3 is an end view.

Near one end of a base or platform, A, :is a standard, B, on the upper portion of which is an adjustable arm-rest, consisting of a board, C, sliding in a vertical bar, D, and held in place by a wedge, d, or other suitable device.

The' sight-beam consists of a bar, E, the rear end' of which is connected with the standard Bby a suitable universal joint. In the drawingfthe joint represented consists of a vertical pivot, e, working in the standard B, and having its upper end attached to a crosshead, f, to which the rear end of the sight-beam is Vpivoted horizontally, by which means the sight-beam may be oscillated in any desired direction. On the upper side of the sight-beam are sight-pieces el e2 similar to the sight-pieces on fire-arms. ,4,

The pencil-holder ,cons,i ts of `a bar, G1, arranged to slide horizontally on the front por tion of the sight-beam, and a bar, G1, having its upper end pivoted to the lower side of thebar G1, so as to hang vertically, and provided, near its lower end, with a socket for the reception ot' the pencil g. The bar G2 may be provided with a weight, h, to' assist in keeping the point of the pencil against the drawing-board, said weight being adjustable, so as to 'increase or diminish the pressure ot' the pencil. On the under side ofthe sightbeam is a knob or projection, i, for engagement `with the thumb of the operator, and immediately in front of said knob is a sliding bar, j, for engagement with the nger. The

barj is connected by a cord or wire with the pencil-holding bar G2.

The guide consists of a vertical bar, K, the

lower end of which is arranged to slide horizontally in the upper part of a standard, L, extending upward from the platform A, so that it may be moved by the left hand of the operator at pleasure. It may be provided with a lever engaging with the sliding portion and extending downward to be operated by the foot instead of the hand.

The drawing-board M is attached to a standard, m, the lower end of whichyis attached to a block, n, arranged to slide horizontally on the platform A, or some suitable projection thereon.

l The parts of the apparatus which are arranged to slide may be held in desired positions by means of wedges, set-screws, or other suitable devices.

l An adjustable stool, S, may be attached to the base or platform.

Y The operator sits upon the stool S, resting both arms upon the arm-rest C and taking sight through the sight-pieces el c25 With one hand the sight-beam E is operated, the

thumb resting against the thumb-piece t', and

the nger against the nger-piece'j. With the other hand the guide K is moved toward the right or left, serving as aside rest for the sight-beam, and enabling the operator to draw straight vertical lines. u, The forward sight-piece elis kept in a line between the eye and the outline of the object to be drawn,

and by moving the sight-beafi". so that said sight-piece will follow said outline, the pencil produces the desired figure upon the paper which is attached to the drawilig-board M.

The pencil-holder should always hang vertically, in order that the pencil may maintain a uniform position with relation to the drawing-board. Y

l The pencil may at any time be Withdrawn from contact with the board by pressing upon the finger-piece j.

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

\ l. The drawing apparatus herein described,

consisting essentially of the sight-beam E, with the sight-beam, as shown and described, jointed pencil-holder G1 Gand the vertical for the purpose specified.

drawing-board M, all adjustable, and con- 4. The adjustable arm-rest C, arranged as structed and arranged substantially as and shown and described, for the purpose specifor the purpose set forth. ed. l

2. The combination of the ngerpiece j, ANDREW MORSE. with the sight-beam and pencil-holder, as Witnesses: shown and described, for the purpose spec- EZRA STAPLES, fled. FRED.V A. LoVEJoY,

3. The adjustable guide K, in combination AVERY ALLEN.

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