US269601A

US269601A - Drawing-board

Info

Publication number: US269601A
Authority: US
Publication date: 1882-12-26
Anticipated expiration: 1899-12-26

Description

No Model.)

' A. H. SINCLAIR.

DRAWING BOARD.

. No. 269,601. Patented 1160.26, 1882 from the rear.

iTE STATES PATENT anion.

ANNIE I1. SINCLAIR, OF PHILADELPHIA, PENNSYLVANIA.

DRAWING-BOARD.

SPECIFICATION forming part of Letters Patent No. 269,601, dated December 26, 1882.

Application filed October 2, 1882.

of Pennsylvania, have invented an Improvement.- in Drawing-Boards, of which the following is a specification.

My invention has reference to drawingboards for both artistic and mechanical drawing; and it consists in providing the board or skeleton frame with hinged slats on the back thereof and close to its edges, and providing said slats with points or projections, which are adapted to be pressed down upon the paper or canvas to hold it in position, and in many details ofcoustruction, all of which are fully set forth in the following specification and shown in the accompanying drawings, which form part thereof.

' The object of this invention is to provide a drawing board or frame with suitable means wherewith the drawing paper or canvas may be secured temporarily in position, and, if desired, allow the paper to be stretched, as is done in cases in which the panel drawingboards are used; further, to reduce the expense in the manufacture of a. drawing-board adapted to the purposes for which this invention is designed.

In the drawings, Figure 1 is a perspective view of my improved drawing-board, looking Fig. 2 is a cross-section of same. Fig. 3 is a cross-section of one edge of the board, showing a substitute for the pins. Fig. 4. is aperspective view of the slats used in the construction shown in Fig. 3. Fig.5 is a similar section, and shows a modification of the slat. Fig. 6 is a front view of the board with the modificationshown in Fig. 5 applied thereto, and Fig. 7 is a cross-section of the board with the slats arranged upon the face.

A is the board or skeleton frame.

B B and G U are the hinged slats, and are secured to the board or frame by hinges E a short distance from the edges and equal to the width of the slat. The slats B are longer than slats O and extend the full length of the board, as shown, and on their hinged side they are notched, as at b, to allow the paper P to. be placed under to form a square corner. The face of all of these slats adjacent to the board or frame are provided with points or projec- (No model.)

tions D, which, when the slats are pressed down upon the paper, pass through said paper and extend into the frame or board, as shown.

To cheapo-n the construction, the pins 1) may be driven through a pine slat and held therein by a veneer, F, of hard wood.

In place of pins D, a rib or projection, D,

may be used, extending the-entire length, the said rib squeezing the paper into a corresponding groove in the rear of the board.

To make the board better adapted for mechanical drawings, the edges of the slats may be extended at right angles, as shown at B, and which, when the paper is stretched and ready for use, come flush with said paper, so that they may be used as straight edges for the T-square, as shown in dotted lines in Fig- 6.

' In place of putting the slats on the back, they may be hinged around the edges of the board or frame and on the front, as shown in Fig. 7; but I prefer the construction shown in Fig. 1.

ln stretching the paper on the board the paper is first wet, and, when expanded, is laid upon the face of the board, and the edges are doubled over'and clamped by slats and pins, and when the paper dries it is as tight as a drum-head.

Having now described my invention, whatI claim as new, and desire to secure by Letters Patent, is-

1. A drawing board or frame provided with hinged slats arranged about its edges, the said slats being-provided with means to catch and hold the paper or canvas, and recesses upon their hinged edges to allow the paper to be bent over the back of the board and under the said slats, substantially as and for the purpose ISO slats 0, provided with pinsD and hinges E, as veneer, and pins D, the said veneer acting to shown and described. prevent the pins being pressed back into the 4. The combination of board or frame A, soft wood,substantially as and for the purpose hinges E, and slats B 0, provided with pins specified. 15 5 D, one or more of said slats being extended, In testimony of which invention I hereunto as at B, to form a straight edge outside and set my hand. flush with the stretched paper suhstantiidlyas 1 r s T and for the purpose specified. Ax

5. The combination of board or frame A, Witnesses: 1o hinges 1 and slats B 0, consisting of soft It. A. GAVIN,

wood covered on the back with a hard-wood I R. S. CHILD, Jr.