US678562A

US678562A - Drawing-board.

Info

Publication number: US678562A
Application number: US5610201A
Authority: US
Inventors: Olcott Haskell
Original assignee: Individual
Current assignee: Individual
Priority date: 1901-04-16
Filing date: 1901-04-16
Publication date: 1901-07-16
Anticipated expiration: 1918-07-16

Description

IINTTED STnTns aTnarT @Trina OLOOTT I-IASKELL, OF SAN RAFAEL, CALIFORNIA.

SPECIFICATION forming part of LettersPatent No. 678,562, dated July 16, 1901.

Application filed April 16, 1901. Serial No. 56,102. (No model.)

To ctZZzl/wm t may concern:

Be itknown that I, OLcoTT HAsKnLL, a citizen of the United States, residing at San Rafael, county of Marin, State of California,have invented certain new and useful Improvementsin Drawing-Boards; and I do hereby declare the following to be a full, clear, and eX- act description of the same.

My invention relates to drawing-boards, and especially to those which by reason of their adaptation to carry the instruments of a drawing-kit and their general convenience and cheapness are intended for use in manualtraining schools and class-rooms generally.

My invention lies in certain improvements which may be stated, briefly, at this point to consist of a novel clamp and gage for the drawing-paper, novel means on the back of the board for housing and carrying the T- square and for securely seating and holding the triangles, adjustable hinged legs for supporting the board and regulating its slope,

'and novel means for conveniently holding the board in a vertical position for displaying completed drawings or disposing of said board when not in use.

These several improvements have for their object, in addition to those desirable results which flow specifically from each, the general result of providing an economical,serviceable, and attractive drawing-board of this class.

Referring to the accompanying drawings, Figure l is a front elevation of my drawingboard, a portion of the clamp-strip U being broken away to show how the sheet of' paper P fits under said strip and is registered against the gage -lip c. Fig. 2 is an elevation of my drawing-board from the back. Fig. 3 is an end elevation of same, showing its position on the bench or table. Fig. 4 is an enlarged broken detail of one corner of the board taken from the upper edge. Fig. 5 is an enlarged cross-section, partly broken. Fig. 6 is a detail section of a modification of the T-square sheath.

A is the board, made of suitable material and stiffened by a back cleat B at each end. These cleats are somewhat heavier than is usual for a purpose presently to be described. Incidentally, however, they make a stiffer board and enable me to carry out the preferable construction of nailing the board to them from the front instead of passing the nails through the cleats into the board.

At the top of the board along its face is a strip C of metal or hard wood. It is secured by means of thumb-nuts D, one near each end, each nut being threaded upon as crewbolt E, preferably a flat-headed machine-bolt, which is screwed from the back through cleat B and through the board and receives upon its projecting end said strip C, which has a hole made in it to fit freely upon said bolt, so that the'strip may move easily thereon.

The strip C is spring-controlled by means of suitably-disposed springs. I have here shown one arrangement by placing spiral springs G around the bolts under the strip, thus normally holding it away from the face of the board and adapting it to receive under it the sheet or sheets of drawing-paper P, which may then be clamped by turning down the thumb-nuts and forcing the strip down upon them. This strip C thus forms a clamp along the upper edge of the board, whereby the drawing-paper, or a number of sheets of said paper, may be readily placed upon the board and securely held without marking, pricking, or marring the paper in any manner; but this clamping-strip C is made to serve another function, to wit, that of a gage or stop by which the paper may bc quickly` and accurately registered with its edges parallel to those of the board. This is effected by providing the strip C with a shoulder or rabbet, forming a lip c, which projects downwardly over the top edge of the board. The paper P, when slipped under the clamping-strip, is pushed upwardly until its top edge is stopped by the lip c, and in this position it will lie with its edges square with those of the board, and it is then clamped.

His the casein which the T-square I is held and housed. It consists of a strip or strips secured to the back of the board by nailing or otherwise,with the ends preferably slipped under the edges of cleats B. When a single strip is used, as shown in Figs. 2 and 5, it is grooved out to form a channel h of' dimens sions adapted to receive the leg or blade of the T-square, and when said strip H is secured to the board this channel h forms a case or sheath, entrance to which is had from either end through openings l), formed in the IOO cleats B in line therewith and parallel with the plane of the board. The T-square I may be inserted from either end, its leg or blade entering and lying in this sheath and its head or hilt lying` against and parallel with the cleat B. When the sheath is composed of two strips, as shown in Fig. 6, the channel for the leg of the T-square is formed by the flanged edges of said strips. In order to hold the T-square in its case against any liability to drop or to be shaken out, there is in this sheath a frictional projection J, formed in any suitable manner and located either in the board, as in Fig. 6, or in the strip H, Fig. 5. In practice I have found that the oval head of a brass upholstery-nail serves the purpose well and that it is best inserted in the strip I-I. This projection, in conjunction with the spring of the strip H itself, causes sufficient friction on the leg or blade of the T-square to hold it in place without interfering with its insertion and removal. This same strip II, together with the cleats B, and suitable frictional projections form holders for the two triangles K and K', whereby the latter are disposed of in a convenient and accessible place.

The edges of the cleats B are grooved or undercut, as shown at h', and the edge ot' strip H is similarly grooved or undercut, as shown at h. In lthe board are placed the projections L, which may be made in any suitable manner, preferably by the heads of brass upholstery-nails. The triangles slip into the grooves h and h', and springing over the slightly-projecting nail-heads L finally fit their holes 7c and k' over these heads, thereupon lying flat in their places, with the nailheads engaging the holes. To remove either triangle, it is only necessary to spring it up slightly over the nail-head and then slip it out ot the grooves.

The board is provided with two adjustable legs M, which are adapted to slip into corresponding holes bored vertically through the top of the table or bench N, upon which said board is to be used. These legs are hinged to the board, working upon pivots at m in the cleats B, with rubber, leather, or other washers m', whereby the legs move noiselessly and the joints are rendered stift' enough to hold the legs in any position to which they are set. Milled -head stop -nuts m2 are threaded on the legs and are adapted to define and limit the insertion of the legs in the desk or bench holes, thereby regulating the slope of the board. To prevent the nuts from accidentally turning oft from the legs and getting lost, .the thread on the legs a short distance from the end may be upset, as shown at m3.

The board may when out of use or for the purpose of conveniently exhibiting completed drawings be held in a vertical position by fastening two vertical dowels or pins O at the rear of the table or bench and boring holes b2 in the lower end of cleats B and setting the board upon the pins O, which enter said holes. l

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-- l. A drawing-board having a spring-controlled clamping-strip adapted to hold the drawing-paper, said strip having a lip forming a stop for the upper edge of the inserted paper whereby said paper is registered square with the board, screw-bolts upon which said strip is fitted and guided, and thu uib-nuts on the bolts acting on said strip.

2. A drawing-board having along the upper edge of its face, a spring-controlled clampingstrip adapted to hold the drawingpaper, said strip havinga lip projecting downwardly over the upper edge of the board and forming a stop for the upper edge of the inserted paper whereby said paper is registered square with the board, screw-bolts upon which said strip is fitted and guided, and thumb-nuts on the bolts acting on said strip.

3. A drawing-board having on its back a channeled strip forming with said board a sheath for the reception of the leg or blade of the T-square and a frictional projection within said sheath, to hold said leg or blade.

4. A drawing-board having on its back a channeled springy strip forming with said board a sheath for the reception of the leg or blade of the T-square and a frictional projection extending from said strip into the sheath to hold said leg or blade.

5. A drawing-board having on its back at each end a stiffening-cleat, provided with a transverse opening parallel'with the plane of the board, and a strip secured to the back of the board between said cleats and having on its under face a channel in line with the cleatopenings, and forming with said board a sheath, to receive the leg or blade of the T- square entered through the cleat-openings.

6. A drawing-board having on its back at each end a stitfening-cleat, provided with a transverse opening parallel with the plane of the board, and a strip secured to the back of the board between said cleats and having a channel in line with the cleat-openings, said strip forming with said board a sheath, to receive the leg or blade of the T-square entered through the cleat-openings, and a frictional projection within said sheath, to hold said leg or blade.

7. A drawing-board having on its back at each end a stiiening-cleat, provided with a transverse opening parallel with the plane of the board, and a springy strip secured to the back of the board between said cleats and having a channel in line with the cleat-openings, and forming with said board a sheath, to receive the leg or blade of the T-square entered through the cleat-openings, and a frictional projection extending from said strip into the sheath to hold said leg or blade.

S. A drawing-board having on its back ICO IIG

stifteningcleats at each end, with grooved or undercut inner edges, a strip on the back of said board extending between said cleats and having a grooved or undercut edge, and frictioual projections in the back 0f the board adapted to engage the holes in the drawingtriangles and with the undercut edges of the cleats and strip which engage the edges of the triangles, forming a means for holding and carrying said triangles.

9. A drawing-board having on its back stifening-cleats at each end with grooved or undercut inner edges and transverse openings parallel with the plane of the board, a channeled strip on the back of the board between the cleats and forming with said board a sheath for the leg or blade of the T-square entered through the cleat-openings, said channeled striphavingagrooved orundercut edge, a frictional projection in said sheath to hold the leg or blade of the T-square, and frictional projections in the back of the board adapted to engage the holes in the drawingtriangles and with the undercut edges of the cleats and strip which engage the edges of the triangles, forming a nieans for holding and carrying said triangles.

l0. A drawing-board having hinged to its back a pair of legs, screw-threaded, and itted with nuts, to adjustably limit their insertion in sockets, whereby the slope of the board may be regulated.

l1. A drawing-board having hinged to its back a pair of legs, screw-threaded and fitted with nuts, to adjustably lirnit their insertion in sockets, whereby the slope of the board may be regulated, said legs having washers at their hinged joints adapted to hold them to the position in which they are placed.

l2. A drawingboard having stitteningcleats on its back at each end, said cleats having holes or sockets in their lower ends adapted to fit over fixed pins, to hold the board when not in use.

In witness whereof I have hereunto set my hand.

. OLCOTT HASKELL. Witnesses:

WALTER F. VANE, D. B. RICHARDS.