US1654594A - Drawing-board support - Google Patents

Description

.Jan; 3, 1928. 1,654,594

J. W. M ADAM DRAWING BOARD SUPPORT Original Filed Feb. 9. 1924 Patented Jan '3, 1928.

UNITED STATES PATENT OFFICE.

JOSIAH W. MGLADAM, OF VANCOUVER, BRITISH COLUMBIA, CANADA.

DRAW-iNG-BOARD SUPPORT.

Original application filed February 9, 1924, Serial No; 691,754. Divided and this application filed September 22, 1925. Serial No. 57,888. V

This invention relates to drawing board sup orts.

The ob'ject'is to provide simple and ellicient supporting means for attachment to drawing boards of the portable'type, or to other similar boards or devices, whereby "the same may be held in the desired degree of inclination while'in use, the said device being readily applied'to any board employing the usual spaced cleats on thebackthe'reof without anyin'ate'ri'al change being necessary.

improved device being adjusted so as to hold the same in such folded position.

The present application is "a div'i-sion of an application filedsby fine on February 9, 1924: for a patent on adrawing'board, said application bearing Serial Number 691,754.

A full and complete understanding o'f'the present invention may be, obtainedfr'om a consideration ofthefollowing detailed description, takenfinjconnection with the accompanying drawing forming a part of this specification; itfbeing understood thatwhile the drawing shows practical formof the invention, the latter is not-lto be confined to strict conformity with the showing thereof, "but maybe changed or modified, so long as such. changes or modifications mark no material departure from the salient features of the invention, as specifically pointed out in theap'pended claims. a a

In the drawing, which similar reference "characters designate corresponding parts throughoutthesever'al figures:

Figure 1 is a perspective View showing the improved support applied to an ordinary drawing board and adjusted to support the same in an inclined position.

Figure 2 is a similar view of one nd of the board, the same being infinver'ted position, and the supporting device shown in folded position infull lines and in active position in dotted lines.

Fig-tire 3 is a detail perspective view of a Another object t0 provide adjustsupporting arm and strut rod.

Figure 4 is an elevation, partly in section, showing a cushlonlng means located at the pivotal oint between the supporting arm and strut rod. L Figure 5 is 'a detail section illustrating the manner of pivotally connecting the supporting arm to the cleat of the drawing board.

Referring to the drawing there is shown a drawing board 1 of an ordinary kind, the

' same having cleats 2 rabbeted into the ends of the board, and extending below the same for the purpose of stiffening and strengthening the board and preventing warping of the same, and to act as feet to rest upon the table ordesk and elevate the board above the same in a well-known manner.

The cleats are provided adjacent to one end, which constitutes the front end thereof,

with a-series of openings or sockets 3 extending preferably, though not necessarily, entirely through the same from side to side thereof and transversely V therethrough. These series of openings are arranged in directlalign ment with each other, longitudinally ofthe board and may be of any desired number. 7

Adjacent to the other ends of the cleats there are provided'in each cleat, a si-ngle opening A extending thereth-rough in the same manner, and spaced from the openings 4 thereare also provided transverse ipassageways 5, all of said openings being located in the projecting portions of the cleats, as clearly shown in the drawing. a c

Supporting arms '6, formed of suitably stiifwire of proper gage have each one vend formedinto an eye 7,, while their other ends are bent substantially at right angles to form rock shafts 8, which are adapted-to be mounted in the aforesaid passageways "5, they ends of. said shafts being upset, as at 9, where extending slightly through said passageways to prevent inward movement of said s'haftsin their bearings, while the supporting arms are located, at the inner sides of the extending portions of the cleats and prevent any, outward movement, the said armsbeing thus free to s'wmgbackward or forward in, lines parallel with, the cleats and transversely of the boardproperg Strut rodslO, formed of the same'material as the supporting arms, have each one end formed into an eye 11 corresponding tothe eyes at the free ends of the arms 6, to which they are pivotally connected by asuitable rivet, and the opposite or free end of each strut rod is bent at substantial right angles to form terminal bars 12 which are adapted to be inserted into any alined pair of the openings or sockets 3, as clearly shown in Figure 1 of the drawing, The strut rods are considerably longer than the supporting arms 6, and with the board arranged right side uppermost, as when in use, the ends of said arms, where provided with the'eyes 7 rest upon the table or desk and support the board at an angle thereto, the rods 10 hold" ing the same rigidly, in position. mien more or less inclination is desired to the board, the bars 12 may be inserted in any other desired pair of openings dwhen the effective length of the supporting arms is changed, in an obvious manner. 'When it isdesired to fold up the supporting means,

' as when the board is not in'use, as shown in Figure 2 of the drawing, the rods 10 are disengaged from the series of openings 3 and the arms 6 swung forwardly and down against the under side or back of the board adjacent to the inner opposed faces of the extended portions of the cleats, and at the same time the struts 10' are swung about their pivotal CODIlGLtlOIlS with the arms in a reverse direction, when the terminal bars 12 may be inserted into the aforesaid openings 1 to effectually hold the device in folded position. n

In Figure 8 there is shown a portion of a supporting arm 6 which has its free terminal bent into an angularly disposed arm 13 and the strut 10 has its terminal formed into a plurality of coils 14 in surrounding relation to the arm 13, the end of which is bent downwardly as at 15 to prevent the coils from slipping off, all of which constitutes a modified form of pivotal connection between the supporting arm and its coacting strut. in

In Figure 4 of the drawing there is shown a supporting arm 6 and a strut 10 associated therewith, each of which have pivotal eyes 16 loosely connected by a suitable rivet to permit their relative movement, and the arm 6 is extended beyond the pivot and formed into an angularly bent arm 17, the

'free end of which is preferably enlarged so as to receive and retain a rubber socket 18 which is adapted to bear upon the surface supporting the drawing board to prevent damaging the latter, and to prevent noise when the board is movedduring use. This isalso shown in Figure 1.

From the foregoing it will be .seen that simple, strong and durable means has been provided, which may be easily attached to an ordinary drawing board without any material alteration in the same, and that the device serves to support the board at different degrees of inclination to suit the wishes of the draftsman or artist, the parts comprising the device being simple and few in number and occupying small space heneath the board and between the cleats and 7 being capable of being folded down and held- 'in an out-of-the-way position so that the boardmay rest flat upon the deskor table if desired, or may be easily handled in transporting or storing the same.

What is claimed is g e 1. A drawing board having cleats each provided with a series of sockets-adjacent to one end, separate supporting arms permaat different" angles relative to the'board. 1

2. A drawing board having end "cleats each being provided with a series of spaced soc rets' 1n their inner faces and ad acent to one end thereof, supporting arms pivotally connected to thecleats near theiropposite ends to swing parallel thereto, separate strut rods each pivotally connected to the' free ends of the supporting arms and each having a terminal barfor engagement with one of the sockets to hold the supporting arm at different angles relative to the board, and an arm projecting inwardly from each pivotal connection and provided with rubber cushions. i i

3. A drawing'board having spaced, transverse cleats attached thereto, eachcleat hav- .mgnear one end a corresponding ser es of spaced alined sockets extending parallel to the face of the board, a supporting arm terminally pivoted on the inner face of each of the cleats adjacentto the opposite ends thereof and adaptedto swing longitudinally ofthe same, astrut rod longer than the supporting arm and pivotally connected at one end'to the free end of each ofthe arms andhaving an outwardly extending terminal at its free end for insertion in one-of the sockets-to rigidly maintain the arm in angular rela tion to the board and support the board at different angles when inverted..

4. Means for supporting a drawing board at different angles of inclination, said board having opposite, transverse .end cleats projecting on its under side and provided, near their upperends,with alined oppositeopenings formed in their inner faces, supporting arms each having an angular terminal pivotally mounted in said openings and held from removal therefrom, said cleats also having at their opposite lower or front ends a series of alined sockets or openings passing transversely through the sameand parallel to the under face of the board, and

strut rods longer than the supportingarmsa and each pivotally connected at one end to the free ends of the said arms and having their other or front ends angular-1y bent outward in opposite directions and adapted to be inserted in any opposite pair of sockets to maintain the supporting arms at an angle to the board and hold the board at the desired inclination.

5. Means for supporting a drawing board at an angle relative to a supporting surface comprising transverse cleats projecting from the back of the 'boardand provided with a {plurality of alined horizontal sockets or openings near their lower ends, opposite supporting arms horizontally pivoted to the cleats near their upper ends and adapted to swing transversely of the board to lie fiat against the same at the inner sides of the cleats, strut rods each hinged at one end to the free ends of the arms and having outturned terminals at their opposite ends to fit in any opposite pair of the plurality of sockets to maintain the arms in angular relation to the board and support the same at an inclination.

6. Means for supporting a drawing board at an angle relative to a supporting surface comprising transverse cleats projecting from the back of the board and provided wit-h a plurality of alined horizontal sockets or openings near their lower ends, opposite supporting arms having their upper ends turned outwardly and permanently pivoted to the cleats near their upper ends, said supporting arms being adapted to be swung 1 transversely of the board to lie flat against the same at the inner sides of the cleats, strut rods each hinged at one end to the free ends of'th'e arms and having out-turned terminals at their opposite ends to fit in any opposite pair of the plurality of sockets at the lower ends of the cleats to maintain the arms in angular relation to the board and support the same at an inclination, said cleats also having other alined horizontal sockets or openings beyond the pivotal points of the arms for the reception of the said outturnedterminals of the strut rods when the latter are in reversed position and the arms are flat against theunder side or back of the board, to lock the drawing board supports in inactive position.

In testimony that I claim the foregoing as my own I have hereto afiixed mysignature.

JOSIAH W; McA'DAM.

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