US2520029A - Drawing board support - Google Patents

Description

E. C. CLEVELAND DRAWING BOARD SUPPORT Aug. 22, 1950 2 Sheets-Sheet 1 Filed Dec. 18, 1946 INVENTOR MAM/6.2M

ATTORN EY 2 Sheets-Sheet 2 Filed Dec. 18, 1946 XJDW mfg

INVENTOR ATTORNEY Patented Aug. 22, 1950 .UNITED STATES PATENT OFFICE Application December 18, 1946, Serial No. 716,929

1 Claim.

This invention relates to new and useful improvements in drawing board supports, more particularly to collapsible supports for converting work-benches in manual training schools to drawing tables to thereby eliminate the need for extra class rooms and facilitate the work of the student and eliminate the confusion of changing from room to room during school hours.

It is among the objects of the invention to provide a collapsible framework which is adapted for mounting on a work-bench and which shall mount a drawing board at an inclination for drafting use and which shall be collapsible and adapted to store the drawing boards when not in use.

These and other objects of the invention will become more apparent from a consideration of the accompanying drawings, constituting a part hereof, in which like reference characters designate like parts, and in which:

Fig. 1 is a top plan view of a work-bench and drawing board support embodying the principles of this invention;

Fig. 2 a cross-sectional view taken along the line 2-2, Fig. 1, illustrating the mounting of the collapsible frame and drawing boards on a wrkbench;

Fig. 3 a cross-sectional View of the collapsible drawing board support and work-bench with the legs of the bench broken away, taken along the line 3-3, Fig. 1;

Fig. 4 an end elevational view of the collapsible drawing board" support in its collapsed position;

Fig. 5 a cross sectional view of the drawing board support of Fig. 4 showing the drawing boards in position for storage; and

Fig. 6 a cross sectional view taken along the line 6-6, Fig. 3.

With reference to the several figures of the drawing, numeral I generally designates a double work-bench having relatively thick work boards 2 and 3 mounted on a supporting frame 4 with suitable legs 5, such benches in manual training schools each being provided with a wood vise 6. The space between the boards 2 and 3 is for tools and work materials and is bridged by a board I.

In accordance with this invention such workbenches may be converted to drawing tables by the use of a collapsible frame consisting of end members 8 and parallel supporting members 9 joined at their ends by transverse members I0 and I I to constitute a pair of rectangular frames on which are mounted slats I2 and I3, the latter being provided with butt hinges I4 by which the two frames are hinged together. The members 2 8 and 9 are provided with triangular notches I5 for engaging the edge faces of the bench boards 2 and 3, as shown in Figs. 2 and 3, and the slats I2 are provided with an edge strip I6 that constitutes abutments for drawing boards I! that are diagrammatically shown in Fig. 2 of the drawing. Similar abutting strips I8 are attached to the strips I0 and II to constitute abutments for the drawing boards I! when they are stored as shown in Fig. 5.

The frames are provided with hooks I9 having stops 20 which engage the inner edge of the bench boards 2 and 3 as shown to lock the frame against displacement when in use. Clamps 2| are provided to hold the boards I1 against displacement when they are stored in the manner shown in Fig. 5. In use the frame structure is opened on its hinges l4 and placed on the work-bench with the right angle notches I5 abutting the faces of the bench boards 2 and 3, as shown, and the drawing boards I! are placed on top on both sides of the hinges I4 in the manner shown in Fig. 2 of the drawings. The boards thus rest against the abutting strips I6 on the members I2 and I3 and on intermediate supports I2a. The work-benches are thereby transformed to drawing tables for the students and may be readily reconverted to work-benches by removing the drawing boards and folding the frame structure on its hinges in the manner shown in Fig. 4 with the hook portions I9 lying inside of the end frames. The drawing boards are then inserted between clamps 2I and the abutting strips I8 in the manner shown in Fig. 5 and the collapsed drawing board frame and boards are ready for storage at one side of the room. The frames may be constructed of poplar Wood or metal, if desired, and the hooks and clamps I9 and 2| are metal as are the hinges It. The entire supporting frame is of relatively light weight and may be conveniently handled in mounting or storing and the drawing boards are carefully protected against marring and breakage by being stored in the supporting frame structure.

It is evident from the foregoing description of the invention that by means of the drawing board supports a workshop may be converted to a drawing room, thereby preserving space and confusion, and that such devices are particularly useful in crowded schools to extend the capacity of limited school space for various uses of the student classes.

Although one embodiment of the invention has been herein illustrated and described, it will be evident to those skilled in the art that various modifications may be made in the details of construction without departing from the principles herein set forth.

Iclaim:

A drawing board support for use on double work-benches comprising a pair of substantially rectangular frames hinged together to adapt them for folding upon each other, the hinged ends of the frames abutting in their extended position, the side frames of which having notches shaped to constitute supporting surfaces, and abutments resting on the work-bench and against the edges of the bench with the hinged portion forming the apex of the support, said frame members having cross bars and edge abutments for supporting a drawing board on each side of the apex of the support, said frames having hook members extensible to engage the inner edges of the work-benches.

EARL C. CLEVELAND.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 181,737 Smith Aug. 29, 1876 1,135,543 Newhall Apr. 13, 1915 1,571,131 McIntosh Jan. 26, 1926 1,658,838 Early Feb. 14, 1928 32,107,049 Young Feb. 1, 1938

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