US1567513A - Drawing table - Google Patents

Description

Dec. 29 1925- w. L. E. KEUFFEL DRAWING TABLE Filed April 7, 1923 vwwntoz wazig Lztxauffez, @Zag 516 abme/:s

Patented Dec. 29, 1925.,

UNBTE@ S'lA'lEfal PATENT @ENCE WlLLIE L. E. KEFFEL, OF EEli-IAUKEN, NEW JERSEY, .AS-SIGNOR TO KEUFFEL AND ESSER COMPANY, 0F EIOBOKEN, NEVIv JERSEY, A CORPORATION OF NEW JERSEY.

DRAWING TABLE.

Application led April 7, 1923.

To @ZZ whom t may concern.'

Be it known that I, lViLLin L. E. KiiUFFnL, a citizen of the United States, and a resident of lVeehawken, in the county of Hudson and State of New Jersey, have inade and invented certain new and useful Improvements in Drawing Tables, of which the following is a specification.

My invention relates to a drawing table and particularly to that style wherein the top may be raised and lowered, as well as tilted or adjusted about a horizontal axis.

An object of my invention is to provide a drawing table of an exceedingly simple but efficient construction whereby the top may be rigidly locked at adjusted heights and with the parts so designed and arranged that the act of locking the table in adjusted positions will at the same time bind and rigidly secure the various parts of the frame together so as to provide a most rigid, strong and stable table.

A further object is to provide a drawing table composed of few parts so arranged that the top may be adjusted both vertically and about a. horizontal axis and locked in adjusted positions and at the same time composed of few parts and of exceedingly simple design so that it may be sold at a very reasonable price and thus meet thel demand for an adjustable but simple and comparatively inexpensive table such as used by manual training schools and other institutions, although the table is at the same time admirably suited for the professional draftsman or architect.

A further object is to accomplish thel aforementioned ends and to provide a drawing table so arranged that it may be readily knocked down or taken apart and the various elements nested together so as to be easily and lreadily crated, and will, either by itself or when arranged back to back to a second table, form a compact unit for convenient handling' and shipment.

lVith the foregoing and other objects in view, my invention consists in the improved drawing table illustrated in the accompanying drawings and hereinafter described and claimed, and in such variations and modilications thereof as will be obvious to those skilled in the art to which my invention relates, it being understood that changes may be made within the scope of what is Serial No. 630,489.

departing from the spirit 4features of my invention;

Figure 2 is a rear plan view of the table taken apart and crated for shipment;

Figure 3 is a detail view illustrating the clamping device for locking the top at adjusted heights; and

Figure e is a view in section taken on the line ir-4 of Figure 3.

Referring specifically to the several views, wherein similar reference numerals designate corresponding parts throughout, my improved drawing table comprises the four legs 10, each being preferably formed of wide, flat material, and arranged in pairs, with the upper ends of each pair provided with parallel confronting faces 11 adapted to slidably receive the upright columns 1Q therebetween. The lower ends of the legs of each pair are held spaced apart by the side bars 13 so that a substantially triangular formation for cach pair of legs is had. i

The lower extremities of the legs are preferably cut along an oblique line as at le and at right angles to the parallel faces 11 so as to rest squarely upon the floor. rllhe confronting faces 11 and the sides of the columns 12 are provided with iutertitting tongues and grooves 13', 14:', so that the columns are constrained to a vertical sliding movement. Adjacent the upper extremities of each pair of legs is arranged a clamp 15, the saine being preferably composed of a U-shape frame or yoke 1G having the ends 17 and 18 thereof extending around the external edges of the legs and seating within suitable notches 19 provided therefor. A holding screw 20 extends through the rear end of the clamp and in combination with a second holding screw 17 which extends through a longitudinal slot 16 holds the clamp in place but does not in any way interfere with the binding action thereof. The front end of the clamp is threaded and provided with a thumb screw 21 so arranged that as the same is screwed up the extremities of the legs will b e 4forced together and into frictional contact with the upright columns 12.

In order to prevent undue wear ot the surfaces with which the thumb screws engage, I provide a metal bearing preferably obtained by first inserting a wood screw 22 into the leg and allowing the head thereoz to receive the end oit the thumb screwi although a metal plate or other similar device may be used it so desired.

The pairs ot legs are rigidly secured in their proper spaced relation by the front and rear cross bars 23, the same being pret'- erably rounded as disclosed and seat within suitable notches 24, a single screw serving to hold each end of the cross bars in place. rlhe cross bars arethus adapted to act as a convenient toot rest as well as serving to secure the leg pairs in their proper spaced relation. rllhe upright columns l2 are per manently secured together by the crossed bars 25, so that a strong and rigid trame is provided and to the upper ends of which is pivotally secured the table top 26. The pivotal securement ot the table top to the upper ends ot the frame is eiected by the provision of cross rails 2'? extending below and secured to the table top and through which and through the upper extremities of the columns or Jframe extend the pivotal pins E28. Suitable slotted and curved segments 29 are secured to the cross rails and may be locled to the upright columns or frame by the thumb screw 30 and thus hold the table top in adjusted tilted position.

iilhen it is desired to raise or lower the table top, the pressure exerted by the clamps is reduced by partially loosening the thumb screws 2l, thereby partially reducing the friction between the legs and upright columns and allowing the relative moven ment ot the two.y but at the saine time preventing the table top from dropping too rapidly. 1With the thumb screws thus partiallv .loosened the table top and traine may be firmly grasped and raised or lowered as desired The-loosening of the clamps allows the legs l() to move slightly one with respect to the othert` thus insuring that the drawing table although being provided with four legsx will always rest squarely upon the floor V regardless of anv unevenness or irregularities of the latter. The clamps are then twain tightened and the table top 1igidly locked lin adjusted position. The pressure exerted by the thumb screws not only locks the table top in position but also rigidly sinds all parts of the table together and thereby provides a most rigid and stable table.

The drawing table as thus constructed ii'iay be readily taken apart and the various elements nested together for crating and shipment. In Figure 2 Iliave illustrated my improved drawing table 'knocked down parts at the same time rigidlyr bound togethen makes it au inexpensive and most 'desirable table,y suitable tor use by manual training schools and other institutions, and

at the same time admirably adapted to the needs et the professional drat'tsmen.

Having thus described and explained my invention, l claim and desire to secure by Letters latent:

la ln a support for a drawing board the combination ot a base comprising two spaced A traine members, means holding the legs otthe fran'ie members in spaced relation at their lower extremities but without substantial bi'acir '9 for bracing the trames and supporting the board comprising vertical members inserted between the converging ends ot the legs ot the A trames7 l'ii'aciiig means between the two vertical members, and means for rigidly clamping the vertical members between. the legs ot the trames comprising a clamp eX- tending between opposite legs of each frame, the clamps beingl located on opposite sides ot the vertical members romthe bracing means whereby the super-structure may be removed `trom the base without removing any part of the clamping or bracing structure.

2. lin a demountable drawing table the combination ot' two A frames each comprising two logs held in space-d relation by a single member near their lower ends, detachable men'ibers extending between the lower ends ot adjacent lefis ot the two trames for maintaining said frames in spaced relaH tion but without substantial bracing. a rigid tramo inserted within the space be` tween the upper ends ot the legs of both rvA and a super-structure locked at adjusted positions and the various trames and having a sliding engagement 1 with said legs7 interlocking means on said trame and legs to constrain the 'frame to' vertical movement, a table top pivoted to the upper end of the rigid frame, and clamps extending around the ends of said rigid trame and embracing the upper ends of opposite legs of each it trame for clamping the rigid trame between the legs, whereby the table may be locked in any adjusted height and the A trames are substantially braced by the rigid trame.

Signed at Hoboken in the county oi Hudson and State or New Jersey this 5th day of April A. D. 1923. i

VVLLIE L. E. KEUFFEL.

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