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Publication numberUS274605 A
Publication typeGrant
Publication dateMar 27, 1883
Publication numberUS 274605 A, US 274605A, US-A-274605, US274605 A, US274605A
InventorsArnold Hormann
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 274605 A
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Description  (OCR text may contain errors)

(No Model.) 6 Sheets-Sheet 1.



.No. 274,605. Patented Man-27,1883.


4% flM/w IN VENTDR ATTORNEY N. PETERS Ptwto-Lhiwgrmbur. wmznm u. C.

' (i She ets- -S heet 2.

(N0 Model.)



No. 274,605. Patented Mar.27, 1883.


ATTORNEY 6 Sheets-Sheet 3.

(No Model.)


No. 274,605. Patented Mar.27,1883.


ATTORNEY s Sheets-Sheet 4.

(No Model.)



Patented Mar.27,1883.



No. 274,605. Patented Mar.27,1883.


WITNESSES I X m QM W N. PETERS. Phololjtlognpher. wahingmn. D C.

6 Sheets-Sheet 6.

(N0 Mqdel.)


No. 274,605. Patented Mar. 27,1883.





. SPECIFICATION forming part of Letters Patent No. 274,605, dated March 27, 1883.

Application filed October 19, 1882.

a pinion and hand-wheel and locked by a ratch et-wheel and gravity-pawl at the proper height. The table is applied to the vertically-adjustable centerpost by a bracket-frame whichis pivoted to the post and secured rigidly by a clamping device operated by a lever-rod and a fulcrumed elbow-lever, the latter being arranged near the front edge of the table. A hinged and folding bracket-arm is supported on the center-post and arranged to carry a drawer and platform at its outer end. A detaehable foot-rest is supported on the base of the center-column by means of suitable hooks andbearing-cheeks. Thetablemaybechanged to an easel by hinging the lower transverse section of the table and locking it by suitable mechanism eitherat right angles to the body of the table or in line therewith. To the under side of the table is applied a pivoted and folding extension, which is thrown up above the table when the same is to be used as an easel.

In the accompanying drawings,Figure 1 represents a rear elevation, partly in section, of my improved drawing-table. Figs. 2 and 3 are detail vertical transverse sections of the mechanisms for raising the center-post and adjusting the table thereon. Fig. at is a ver tical transverse section of my improved drawing-table. Fig. 5 is a detail vertical transverse section of the lower transverse section of the table, shown locked at right angles to the table and in line therewith, according as the table is to be used as an easel or a drawing-ta ble. Fig. 6 is a detail view of the lever mechanism for clamping the table to the centerpost. Fig. 7 is a vertical transverse section of a simpler construction of my improved draw- (Xo model.)

on line 3/ Fig. 4. Fig. 11 is atside elevation,

partly in section, of a drawing-table construct ed on a larger scale and supported on two colnmns. Fig. 12 is a horizontal section of the I same on line as .r, Fig. 11; and Figs. 13 and 14 are details showing the connection of the footrest with the supporting-base.

Similar letters of reference indicate corresponding parts.

Myimproveddrawin g-table can be constructed with a single column or with double supportingcolumnsorpillars. In onecasethecolurnn Ais supported on a base, A, having three orfour legs, with or without casters, as desired. The column and its base are preferably made of cast-iron, the legs of the base being either secured by wed ge-shaped tongues to corresponding grooves of a socket, A as shown in Figs. 1 and 4, or the legs may be cast in one piece with the socket or sleeve, as shown in Fig. 7. The column A is made hollow and is secured at its lower end to the socket A of the base A in any approved manner. The tubular column A serves to guide the vertically-adjustable post B, to the upper end of which the table 0 is applied by means of a strong bracket-frame, G, and a suitable clamping mechanism, D. The vertical adjustmentof the post B and table 0 is accomplished by means of a hand-wheel, a, the shaft of which turns in bearings a of the column A and carries a pinion c that meshes with a rack, n. castinto the post B, as shown clearly in Figs. 2 and 4c. The post Bis splined to the column A to prevent axial motion and locked automatically at any desired height by means ofa gravity-pawl, (i that takes into the teeth of a ratchet-wheel, a keyed to the shaft of the t handwheel. a or cast in one piece with the transmittin'g'pinion a as shown clearly in Fig. 2. By turning the hand-wheel a the table (3 is raised, while for lowering the same the gravity-pawl is withdrawn from the pinion a too and released at the proper moment.

In cheaper constructions of the drawing- 2 cameos table the pinion and rack and the pawl-andratchet mechanism are dispensed with and a plain clamp-serew used in place thereof for securing the center-post at the proper height, as in Fig. 7. The proper inclination of the drawing-table is obtained by the clamping mechanism D, which is operated by means of a short fulcrumed elbow-lever, (1, near the lower front edge of the table 0, said fulcrumed lever being connected by a pivot-rod, cl, to the crankarm (1 of a clampi1'1g-disk,d that turns on the pivot which connects the bracket-frame O to the post B, the connection of the latter being made by means of conical frictioncheeks 6 e, as shown clearly in Fig. 3. d is provided with radial ribs d, as shown in detail in Fig. 6, which move, on turning the disk around its axis by means of the lever 01 and connecting-rod d, overinclines d of cheek e of the bracket 0, so as to press the conical cheek'e tightly against the check 0 at theupper end of the post B, as shown in Fig. 3. The operating elbow-lever d of the clamping device D is arranged at the lower front part of the table 0 and swung to one side or the other, so as to apply or release it from the bracketframe 0 of the table. By this arrangement of the lever the table 0 can be readily adjusted at any desired angle of inclination on the post B without 'stooping down or other inconvenience.

A drawer and platform, E E,for the storage and support of the drawing-instruments and other articles, are supported on the outer end of a folding.bracket-arm,E the inner end of which is applied by a sleeve, E to the post B, so that the bracket-arm E may be turned on the same into any desired direction, so as to bring the drawer and platform .into the most convenient position at either side of the drawing-table. After use the bracket-arm is folded and the platform and drawer are stored away below the table.

The drawer-frame may be provided with supports for the water-tumbler and other appliances, as shown in Fig.8. When the drawing-table is designed for artists use it is provided with a folding frame, F, at the. under side of the table 0, and with a hinged transverse section, F, at the lower part of the table 0, as shown in Figs. 1 and 9 and Figs. 4 and 5, respectively. The eXtension-frameFis made of two sets of strips, ff, of which the strips f are pivoted to the drawing-table 0, near the upper edge thereof, while the strips f are hinged to the strips f, and connected thereto by hooks and eyes f when folded back of the table, as shown in Fig. 1, or they are locked to recesses f of the opposite strips, ff, when extended, as shown in Fig. 9. The strips ff are retained in folded position at the under side of the table by suitable clasps or other catch devices, f When the strips ff are thrown up and are connected to each other by means of the strips ff and the hooks and eyesf f the angular ends of the stripsff The clamping-disk are seated in the recesses fff of the strips ff, so as to impart thereby'the required degree of rigidity and stability to the extension-frame F, as .shown in Fig. 9. The lower hinged transverse section, F, of the table 0 is either locked into line with the body of the table by means of hooks g, which'engage slide-bolts g, or at right angles thereto by pulling forward the slide-bolts g, as shown clearly in Figs. 4 and 5. The sliding bolts g are guided in slotted casings g", let into recesses at the under side of the drawing-table O, the bolts being provided with a finger-rest, so as to be readily drawn out or returned. The hinged sec tion F is provided with heels 9 for the slidebolts 9, whereby a rigid support for the section F is obtained when it is thrown up at right angles to the table 0. By pushing back the slide-bolts g, returning thesection F into line with the body of the table O, and looking it then by means of the hooks g and slidebolts 9 the hinged section Fis firmly retained in position in line with the body of the table. The extension-frame F and the hinged section F admit the ready changing of the drawing-table into an easel wheneverthis is desired. Y

As it is desirable in drawing-tables of this class to provide a support for the feet, a foot board or rest, H, is arranged, which is applied by means of hooks h to the rear legs of the base A, and by means of slots, brackets, or

other devices, h, .to the front leg or legs of the base A, as shown clearlyin Figs. 4, 10,12, 13, and 14. In drawing-tables of larger size, which are supported on two columns-such as shown in Figs. 11 and 12-the vertical adjustment is accomplished by the hand-wheel, intermediate bevel-wheels,and a longitudinal shaft having pinions at the ends which mesh with the racks of the vertical posts B, as shown in Fig. 12. The inclination of a drawing-table supported on two columns is adjusted by means of clamping devices operated by hand-levers at the lower front part of the table in the same manner asin tables with single columns. In doublecolumn tables it is preferable to. arrange the folding bracket-arm E which supports the,

platform E, in connectionwith one of the columns, and the drawers E in connection with the other column, as shown in Fig. 11.

By the different adjusting mechanisms de scribed, the drawing-table may be readily arranged at any desired height and inclination, with the drawing materials closely and conveniently at hand, or changed into an easel when required for painting and exhibition purposes.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. The combination of a supporting-column, a vertically-adjustable post, a drawing-table having a'bracket-frame pivoted to the upper end of the post, and a clamping device applied to the bracket-frame and actuated by a connecting-rod, and elbow-lever fulcrumed near the 274,605 r i a lower front edge of the table, so as to adjust the table to any desired inclination, substantially as and for the purpose set forth.

2. The combination of the supporting-colown. A, vertical adjustable post B, having acone-plate, 6, drawing -table 0, pivoted by bracket-frame G,baving a friction-cone, c, with inclines d to the plate e, clamping-plate (i having ribs d and arm at, lever-rod d, and elbow-lever d, fulcrumed to the lower front edge of the table 0, substantially as specified.

3. The combination, with an adjustable drawin g-table, of an extension-frame pivoted to the upper part of the table, a transverse section hinged to the lower'part of the table, and means 'for locking the latter at right angles to the body of the table or in line therewith, whereby the drawing-table may be changed into an easel, substantially as set forth.

4. The combination, with a drawing-table, 0, having retaining-clasps F, of the pivoted strips f f, having angular recesses), and strips f f, hinged to the strips ff and connected thereto by hooks andeyes or other fastening devices, f substantially as described.

5. The combination, with a drawing-table, of a transverse section hinged to the lower edge of the table, of sliding bolts for retaining the hinged section at right angles to the body of the table, and of means whereby the hinged section is locked by the slide-boltsin line with the body of the table, as described.

6. The combination, in a drawing-table, of the base of the supporting column or columns, with a detachable foot-rest supported on the rear legs by hooks and at the front leg or legs by suitable cheeks or seats, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed my name in pres- 40 once of two subscribing witnesses.




Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2898702 *Feb 25, 1958Aug 11, 1959Pignone Edward HAdjustable drafting board assembly
US3104762 *Mar 20, 1961Sep 24, 1963 Adjustable paint brush holder
US4805542 *Dec 9, 1986Feb 21, 1989Joerns Healthcare, Inc.Table
US4828208 *Jun 10, 1988May 9, 1989Joerns Healthcare, Inc.Vertically adjustable table with retractable caster assembly
Cooperative ClassificationA47B27/00