US1330549A - Drawing-board - Google Patents

Description

R'. RABY.

DRAWING BOARD.

APPLlCATION FILED AUG. l2. 1919.

1,330,549; Patented Feb.10,1920,

2 SHEETS-SHEET l- S14/vento@ R. RABY.

nRAwmG BOARD.

APPLICATION FILED `AUG. I2, i919. 1,330,549'. Patented Feb. 10,1920.

2 SHEETS- SHEET 2.

@Mum/Lto):

AUNITED STATES- PATENT OFFICE.

RICHARD BABY, 0F LOUDON'VILLE7 OHIO.

DRAWING-BOARD.

Application filed August 12, 1919.

T0 all w/wm t may concern.'

Be it known that l, RICHARD R-ABY, a citizen of the United States, residing at Lou* donville, in the county of Ashland and State of UhiO, have invented certain new and useful Improvements in Drawing-Boards, of which the following is a specification, reference being had therein to the accompanying drawing.

The invention relates to drawing boards and has for its object to provide a drawing board wherein a sheet of paper is easily,

' spring means comprising crossed spring wires having one of their ends embedded in the clamping member and their other ends embedded in the body of the drawing board.

lith the above and other objects in view the invention resides in the combination and arrangement of parts as hereinafter set forth, shown in the drawings, described and claimed, it being understood that changes in the precise embodiment of the invention may be made within the scope of what is claimed without departing from the spirit of the invention.

In the drawings f Figure 1 is a perspective view of the drawing board.

Fig. 2 is a detail view of the upper edge of the drawing board showing the clamping member and spring wires for actuating the same.

Fig. 3 is an enlarged detail sectional view taken on line 3 3 of Fig. 2.

Fig. 4 is a bottom perspective view of the rear or top end of the drawing board.

Fig. 5 is a sectional view taken on line 5-*5 of Fig. 3.

Fig. 6 is a perspective view of one of thev wires showing its right angle portions at different angles, thereby insuring a spring clamping action on the clamping member at all times.,

Referring to the drawings, the numeral 1 Specification of Letters Patent.

Patented Feb. 1o, 1920.

Serial N0. 316,947.

designates a drawing board of conventional shape and 2 the main body thereof. The sides 3 of the body 2 are preferably glued in channels 4 of side reinforcing strips 5, which strips are adapted to form straight edges and at the same time prevent longitudinal warping of the body 2.

Paper is clamped on the drawing board by means of a pivotal clamping member 6, said clamping member being hingedly connected to the body member 2 by means of a hinge 7, which hinge is preferably made from a strip of fabric or leather and is glued fas at 8 to the clamping member 6 and as at 9 to the body member 2, thereby hingedlyA 'connecting the clamping member to said body member'. By the use of a fabric or leather there is a certain amount of give, thereby allowing a clamping of the paper 10 along its entire edge. The upper end of the body member 2 is beveled off as at 11, said bevel terminating in a preferably vertical surface 12, which surface 12 is adapted to abut a correspondingly angled surface 13 of the clamping member 6 at a point over a hinging point between the two sections, there being a forwardly extending projection 14 on the clamping member 6 which is adapted to engage the upper surface of the paper 10, and securely clamp the same against the bevel surface 11 of the body member 2.

Spring wires 15 form spring means whereby the clamping member 6 is normally held in closed position. These wires are crossed as at 16, thereby extending diagonally across the hinging point 17 between the clamping member 6 and the body member 2. The ends of the spring wires 15 are provided with right angle portions 18, which extend into the clamping member 6 and the body member 2 and are disposed in metallic ferrules 19 embedded in said members 6 and 2. The metallic ferrules prevent the right` angle portions 18 from enlarging the holes in the wood and at the same time forml bearings for the slight movement of the angle portions 18 during a pivotal action of the clamping member 6 when the same is forced downwardly at its outer edge into the pockets 2O formed at the rear ends of the channels 4, said pockets having their inclined surfaces terminating ,adjacent the hinging point be* tween the members 6 and 2.

To insure the positive clamping of the clamping extension 14, spring wires 15 have their angle portions 18, as clearly shown in Fig. 6 normally at angles to each other, thereby when the springs are placed in position in the ferrules 19, these arms are moved to the same vertical plane thereby giving a slight twist to the bodies of the spring wires 15. It will be seen that if the spring wires are 4placed in engagement with the errules, with a twist in said wires that a positive clamping action is assured on the paper.

Clamping members 6 may be provided with a protractor 22, said protractor being adapted to establish angles while drawing and may be used in connection with a pivoted head T-square and angles.

The invention having been set forth what is claimed as new and useful is l. A `paper clamp for drawing boards comprising pivoted member pivoted to the upper edge of a drawing board, said pivotal member being provided with an overlapping tor grasping and clamping agonally across the engaging edges ot the clampingmember and the drawing board, said spring having one of its ends secured to the clamping Kmember near its end, its other end being secured to the drawing board adjacent the opposite end of the clamping member, and means for securing the ends of said spring wire against rotation when the clamping jaw is pivoted upwardly.

2. A drawing board comprising a body member, a. pivoted paper clamping member hinged to one edge ot said drawing board, said clamping member being provided with means for clamping the edge of a sheet of paper against the body member, a spring wire secured to one end oit the clamping.

member and extending diagonally across the engaging edges or the clamping member and the body member, said wire having its other end secured to the drawing board adjacent the other end of the clamping member, and means for securing the ends of said spring wire against rotation so that as the clamping member is opened said spring wire will twist thereby insuring the spring closing ot said clamping member.

3. A drawing board comprising a bedy member, a pivoted paper clamping member hinged to one edge of said drawing board, said clamping member being provided with means for clamping the edge oi a sheet of the drawing paper, a spring wire extending dipaper against the body member, spring wires extending across each other and diagonally across the engaging edges or the clamping member and the body member, the ends of said spring wire being provided with angle portions at diderent angles to each other whereby a twist is imparted to the spring wires, apertures in the clamping member and the body member for receiving said angle portions after they have been twisted to the same angles, said angle portion causing the twist in the spring wires to normally hold the paper clamping member in clamping engagement with the body member.

4t. A drawing board comprising a body member, a pivoted paper clamping member hinged to one edge of said drawing board, said clamping member being` provided with means for clamping the edge of a sheet of paper against the body member, said means cemprising a spring wire extending diagonally across the engaging edges oil the clamping member and the body member, the ends of said spring wire being provided with angled portions at different angles to the body portion oit the spring` wire, whereby when said spring wire placed in position and the angle portions thereof forced into engagement with the clamping member and the body member and embedded therein at the same angle, a twist will be imparted to the spring wire for imparting a clamping action to the paper engaging portion of the paper clamping member.

5. A paper clamp for drawing boards comprising a pivoted member pivoted to the upper edge of a drawing board, said pivotal member being provided with a aw for engaging and clamping the paper against the drawing board, a spring wire extending diagonally across the engaging edges of the clamping member and the drawing board, means for securing the ends of said spring wire against rotation when the clamping member is moved, lsaid hinged connection between the pivoted member and the drawing board being formed from a material which will allow the spring wire to cause the clamping edge of the pivoted member to enn gage the paper along its entire length.

In testimony whereof I hereunto aflix my signature.

RICHARD BABY.

Images