US1812744A - Drawing board attachment - Google Patents

Description

June 30, 1931. R. s. GLENN DRAWING BOARD ATTACHMEN'I Filed Feb. 13. 1928 s Sheefo-Sheet 1 INVENTOR R. 6. G2 en-n ATTORNEY June 30, 1931. GLENN 1,812,744.

DRAWI NG BOMID ATTACHMENT Filed Feb. 15. 1928 3 Sheets-Sheet 3' INV NTOR 72.6. a enn,

ATTOR NEY Patented June 30, 1931 ROBERT S. GLENN, GISGO, TEXA$ DRAWING Bon to arrmcnunnr Application filedFebrixary 13, 1928. Serial No. 254,099.

This invention is a drawing board attachment, and it consists of the construction, combinations and arrangements, herein described and claimed. k

An object of the invention is to provide an attachment possessing features of advantage of particular interest to draft-smen and the like, the former comprising a combined 1nstrument compartment and holder for a lamp or lamps.

Another object of the invention is to provide an attachment, having combined therein the features last enumerated and having the additional advantage of adjustability, the latter advantage making it possible notonly to dispose the instrument compartment in an easily reached position, but also to place the lamp so that the light-will be thrown exactly where wanted on the drawing board. I 7

Other objects and advantages appear in the following specification, reference being had to the accompanying drawings, whlch:

Fig. 1 is a side elevation of the attachment, the drawing board to which it 1s shown applied being illustrated in section,

Fig. 2 is across section taken on the l ne '22 of Fig. 1, r

Fig. 3 is a detailed perspective view of the forward arm of the bracket,

Fig. 4 plan view f heattachment,

' Fig. ,5 is an inverted plan v ew eff the combi e st ument comp rtment an lamp holder, j

ig- 6 s a cross secti n taken on the l ne 6-6 of Fig. 1,

Fig. 7 isv a of the components of the angle rack, V

g- .8 i d tail se ti n ew o h instrument compartment-alone.

ig- 9 is a d ailed plan view the nk bottle holder, r r

Fig- 10 i in rted p an iew of he in bo t e ho e 1 F gl s a detail sect onal View taken on the line 1 1,1l of Fig. 9,

Fig. 12 is. a detail sectionalview of a slightly mo fied o of r c t c amp; v r

' Any person ho bash o d ith the making of drawings, sketches andthe like, kno s the arious .implemeu sicustomar in the Way. It is usually the practice of draftsmen to keep the necessary instruments either at one side of the work table or in a desk drawer. Sometimes a draftsman will determine, out of a desire for aneatappearing desk, to keephis instruments in a convenient drawer but by virtue of his absorption in his work will lay certain instruments upon the desk and others in the drawer.

The result is some degree of confusion It is not within the province of the invention to overcome personal tendencies toward forgetfulness on the part of the draftsman, but to provide an appliance wherein he may keep all of the variousinstruments necessary to the particular kind of work he is doing. lVith a little schooling, the user will soon learn to replace each implement upon the appliance. The latter. is of especial advantage when used in connection with small drawing tables and boards which, generally are sloping in character. 7 7

Another advantage of the invention resides in the convenient disposition of thelampor lamps. Drattsmen are usually fastidious in, the matter of illumination of their work. i

The light sh u d b th o n UPON-1 drawng board in p ec sely the prop r manne in o d 0 a oid an Object on le glue; T ,err i a e Pr i s b h f t e Pr per ghting of the-dra ing board and the ec ption of all accessories necessary to drawing.

, Reference is made to the drawings. The p 7 drawing board is indicated 1. The drawing tai d si e a ion of on board may be one of the kind mounted upon a pedestal, The cleat 2 may or may not be used. It may be presumed to be a part of the drawing board. A clamp serves to secure the attachment to the drawing board. It

c mp e y ke, 3 w h os es 4 a d 5 at .the extremities, the latter being internally hre ed protuberance 6, intermediate the extremities of the yoke, carries an abutment 7 h eh en ges. th top of he drawing bo The abut ent is h n to omp is an adjustable screw and a plate, the -309- n atienof th la a Pref rably ei g sw e so hat the; s ate my b adepteh e o. variou ily employed are prone to get misplaced or i 4 inclinations of the drawing board. A clamp screw 8 in the boss 5 permits securing the clamp yoke in position. The protuberance 6 is integral with the yoke. It includes a pair of lateral projections 9 which increase the area of bearing upon the drawing board.

An advantage of the particular type. of clamp just described is that application of the device may be made thereby to any drawing board or table. The action of the clamp is independent of that of the appliance itself. As will presently appear, the arms of the appliance may be freely swung without disturbing the clamp.

A bolt 10 mounted in the protuberance 6 and projecting through the boss 4 carries the rear arm 11 of the attachment. Lugs 12 on the arm receive the bolt. A thumb nut 13 on the bolt 10 bears upon a spring 14 disposed between the nut and the uppermost lug 12 to hold the arm 11 under tension. A

lug 15 on the other side of the arm 11 rides upon a circular plate 16 that forms part of the clamp. The plate 16 and lug 15 are for the purpose of creating friction in order that the appliance will stay in any adjusted position.

The forward arm 17 of the attachment is pivotally connected to the rear arm 11 by a bolt 18 which passes through registering holes in confronting lugs 19 and 20. The lower lug 20 of the arm 11 is enlarged to resemble the plate 16 of the clamp, the purpose being to provide an additional support for the arm 17. The latter has a button 21 that rides on the plate. A thumb nut 22 imposes pressure upon a spring 23, the purpose of the arrangement being to hold the arm 17 under tension.

A bolt 24 provides the connector between the forward arm 17 and the instrument compartment generally designated 25. The bolt passes through confronting lugs 26 and 27 on the arm and compartment, respectively. The lower lug 26 is enlarged in order to provide a bearing surface for the button 28. A thumb nut 29 bears against a spring 30, thereby holding the compartment in position. A pin 31, inserted through the bolt 24 above a washer, prevents riding up of the compartment in respect to the bolt.

It is to be observed that the lower lug 26 of the compartment 25 is actually part of a plate 32 which extends under the bottom of the compartment. This plate may be varied in width, that is to say, it' may be as wide as the compartment or it may be narrower. In any case it provides a rest or foundation for the compartment. In addition to that, the bottom plate 32 serves as a mounting for the ink bottle holder or tray- 33, lamp and shade 34, 35 as well as a plate 36 that, serves as a light reflector.

In order to mount the holder 33 the bottom plate 32 is provided with a front formation 37 of a character suitable to sustain the bolt 38 to which the hollow body of the tray (Fig. 11) is preferably fixed. A receptacle 39 may conveniently hold thumb tacks. A receptacle may be removed by means of a tongue 40. The hollow body of the tray has registering holes 41, 42 into which the respective body and neck of a bottle are inserted, as indicated by dotted lines in Fig. 11.

A circular bottom 43 supports the ink bottles which are inserted into the tray from beneath. A cut-out 44 is moved into registration with any set of ink bottle holes upon turning the circular bottom upon the bolt 38 by means of ahandle 45. Ordinarily the cut-out 44 would be stationed in the region of the solid portion of the tray body 33 above which the receptacle 39 is located. The bottom 43 may be turned in either direction in order to effect registration with any set of holes. Care must be exercised to prevent one of the bottles from falling out when the cutout 44 is moved over to the central set of ink bottle holes (see Fig. 10).

A spring 46 (Fig. 11) holds the circular bottom 43 under tension. A nut 47 not only serves to adjust the tension of the spring but also to hold the various parts upon the bolt. A metallic clip 48 on the plate 43 engages beneath the hollow body of the tray. The clip should consist of yielding material and in practice will be bowed in shape. The clip stabilizes the bearing of the circular bottom beneath the hollow body. The ink bottles are ordinarily loose enough in the hollow body to permit the clip 48 to ride thereunder.

Supports for a draftmans scale and tri angles are provided by the racks. 49 and 50. One of the components of the latter is illustrated in Fig. 7. It comprises a bent wire 51 having the ends secured to the extremities of a bottom plate 52. Certain convolutions of the bent wire are welded to the latter plate. The angle rack is illustrated in Figs. 4 and 6.

The compartment 25 will be subdivided in order tocontain instruments of various kinds. These subdivisions may comprise drawers 53 and 54. One of these opens at the front, the other at the side. above the drawer- 54 (Fig. 8) is a shelf 55. Things may either be laid upon this shelf or upon the forward extension 56 of the compartment immediately thereblow. A wire 57 is used to reinforce the front edge of the shelf 55. The upper surface of the forward extension 56 is preferably lined with velvet. The leading edge of the forward extension is reinforced by an angle bar 58 which also serves as an abutment for the front formation 37 of the bottom plate 32.

Fig. 12 illustrates a modification of the clamp. Here the screw 10 is arranged to be turned within the boss 40f the yoke 3. The

end of the screw bears upon a spherical Immediately 3:.

largem-ent 59 on top of the heel 60 of a bracket holder 61. The arm 11 of the bracket is attached to the holder 61 in a. manner similar to that already described.

The holder has a button 62 reclining in a receptacle 63 in a part of the yoke 3. The advantage of the arrangement in Fig. 12 will be perceived at once. Vertical adjustments of the bracket are made by turning the screw 10 in either direction. The button 62' and receptacle 63 comprise a swivel upon which the holder 61 will rock. The rounded end of the screw 10 will ride over the spherical enlargement 59.

The operation is readily understood. The

or lamps 34 and the bottle holder or tray 33 impose considerable weight upon the bracket, it is necessary that the joints between the arms shall be properly supported. Each arm, as well as the bottom plate 32 of the compartment 25, has a button which rides upon an extension of the mounting next preceding. The arm 17 for example, has a button 21 which rides upon an extension of the bottom lug 21 of the arm 11.

The use of the bottle tray has been explained. The handle 45 of the circular bottom 43 is moved in either direction until the cut out 44 uncovers a set of registering bottle holes 11, 42. The bottle will drop out into the hand of the draftsman. The various bottles are intended to contain inks of the different colors ordinarily used by draftsmen, and the fact that they are'so disposed that they cannot be overturned and are always at hand, yet out of the way, make the device of particular convenience. The reflector plate 36 aids the shade 35 in concentrating the light from the lamp or lamps 34 upon the drawing board. The wires from the lamp or lamps 34 may be led back in any appropriate manner as illustrated, for example, in Fig. 5. The arrangement of the lamps prevents any shadows on the board and conceals them in a manner to prevent eye strain.

While the construction and arrangement of the improved attachment is that of a gen erally preferred form, obviously modifica- Having once been attached the pair of lugs, an arm supporting the compartment for swinging and having a pair of lugs, means fitting through the various lugs to compose a joint, and a button associated with one of the lugs engaging and being slidable upon an "adjacent lug to compose a restricted but continuous bearing and to receive the joint of strain. i

2. An attachment of the character described comprising a bottom plate, a compartment supported by said bottom plate, lugs exhaving a heel with a spherical enlargement,

and a screw engaging the enlargement and being adjustable upon the yoke to rock the holder upon the swivel connection aiforded by the button and receptacle.

4;. A device of the character described comprising a swingable compartment and a supporting arm therefor, small and large lugs on both the arm and compartment, means connecting the lugs in confronting relationship, and a button on one of the large lugs bearing on the peripheral side of the other large lug.

Si ed at Cisco, in the county of Eastland and tate of Texas, this 31st day of January ROBERT S. GLENN.

tions and changes may be made without departing from the spirit of the invention or the scope of the claims.

I claim:

1. An attachment of the character described comprising a compartment having a

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