US1676746A - Universal drafting table - Google Patents

Description

July 10, 1928.

M. REID UNIVERSAL DRAFTING TABLE original Filed May 6. 1922 6 Sheets-$heet 1 min July 10, 192s.

M, REID UNIVERSAL DRAFTING TABLE Criginal Filed y 6. 1922 e Sheets-Sheet 2 July 10, 1928.

M. REID UNIVERSALDRAFTING TABLE 6 Sheets-Sheet I5 Original Filed y 6. 1922 July 10, 1928. 1,676,746

M. REID UNIVERSAL DRAF'IING TABLE Original Filed y 6. 1922 6 Sheets-Sheet 4 HHHH July 10, 1928.

M. REID UNIVERSAL DRAFTING TABLE Original Filed y 6. 1922 6 Sheets-Sheet 6 E JM MW;-

July 10, 1928.

M. REID UNIVERSAL DRAFTING TABLE j 6M ay 5 board frame.

Patented July 10, 1928.

UNITE s r MARCELLUS REID, 0F CLEVEZAND, OHIO.

UNIVERSAL DRAFTING :TAIBLE Application meme 6, 192 2, Serial no. 559.0941, Renewed April 2c, 1927.

My invention relatesfit'o improvements in 'universal tables for engineers, architects,

artists and draftsmen, and it is designed to give the greatest convenience 'andefliciency to the user and to avoid and eliminate the unhealthful conditions connected with the use of the ordinary table for drafting, used by engineers,- draftsmen and architects, and is of substantial construction.

To provide the ideal conditions for workingovera table of this kind, the following main features are provided in my invention: I

1st. A substantial'base and colu'mn with means for rapidly elevating and lowering the table. V

2nd. Means for conveniently and rapidly inclining the table from a horizontal position to a vertical position. i i

3rd. A table consisting of ametal franie, designed so as to givethe greatest strength and rigidity, with minimum: weight, being made principally of sheet steel and'spotwelded or riveted together, the tabl'e'containing parallel working angles or strips at opposite ends on which "IT-squares or other instruments are used, thus avoiding the errors due to the inaccuracy and changing conditions of drawing boards when .only the edge of the boardis depended upon.

4th. Means forrevolving or turning the table in any position and means for -holdin'g a drawing board within a frame with means for quickly detaching or removing the drawing. boardso as to use one or moreboards without removing the drawlngs from'the boards.

. In the accompanying drawings Fig. l is a front elevation or view of-the apparatus;

Fig. 2. is a side elevation or view of. the

same; Fig. 3 is an enlarged view of a section of Fig. 1, showing the means for elevatlng "or lowering the table, and means for in'clining the table or support for thefdrawing Fig. 4 is a side vie'wof Fig. 3, both these views containing dotted; lines showing the construction of the gearing for.

operating or providing the variousn ovements required 'toadjustthe table in any position, thereby providing universal adjustment; Fig. 5 isa sectional plan view of I thevtable frame; Fig-6 is a verticalflsection ofthe table frame shown in Fig 5 looking in direction, of. the arrows on dotted line 13-13 (Fig. 7) the strips of wood P f and angles R being shown on a section at 'the dotted line 1 4 ,14 in directionof the rows; Fig. 7 is apart front sectional view of the table frame; Fig. 8 is a sectional View of the clampingdevice taken on a horizontal section at (Fig; 4;) looking'in direction of arrows; Fig. 9 1s a vertical section at -9 i looking'in direction or the arrows; Fig. 10 is a sectional View of the elevating gearshown at l 0'10 (Fig. 3) in d1rect1o11 of the arrows; Fig. 11 is a top view of the complet'etable frame with the draw ing boardv detached; Fig. 12 is a sectional view at 12-42 (Fig. 11) including the draw- I ing board; Fig. 13 is an end view of the drawing boardlframe or table; Fig. 14 is a I frontv1ew-'andF1g. 15 is an end view of a F construction above the column to be used when no mClmmgad u'stment is'used and I I i justment of the table, shown inFigs.'3 and,

substitutes the mechanism forinclining ad.

4; Fig. 16 shows a similar "construction to when a fixed incline to the table is required.

In operation of this table, vertical adjustfastened to the end of the worm spindle that shown in Figs. 14;,and15, tobe used- 0-said spindle being integral withfthe worm d whichnieslles with the gear also shownonFig. 10 in section'said worm gear-being fastened to the spindle ff which I is integral with the pinion. g said pinion meshing in the rack it shown in dotted lines on 3 andinsection on Fig. 10. a

For ease of operatiomfla ball thrustbearing is provided at i (Fig, which takes'the .thrustof' the spindle candthe outer enldof the spindlec supported in thebearing j, the s opposite 'end suppo rted in the bearing 7 It will be evident that turning the handwheel a. in onejdirection will. elevate the rack spindle h and in the opposite direction will lower same. The rack spindle is provided with a'spline or' keyway y'z' shownin dotted lines (Fig. 3) andins'eCtiOn (Fig.

10). Engaging this keywayor spline is a block or key (Fig. 3) held in place by the clamping screw j? (Fig. 8). I The screwij isrused to clamp the key 3' and also to clamp the elevating spindle ii. At-the upper end ofthe rack spindle h is fastened the tablesupportingframe A (Figs. 1, 2, ,3

and 4) whichis fastened to this spindle by the screw m. and'otherwise keyed to hold the frame rigid to the rack spindle It.

For tilting the table, the hand wheelfa 7 (Figs. 1,3, and f) isfastenedto the end of the worm spindle (Figs. 4c and 9) on which is keyed the worm d (Figs. 4 and 9) which meshes with the gear 6 (Figs. 4 and 9). .j WVorm gear 6 is fastened to the spindle f (Figs. 4c and 9) which is integral with the pinion 9 The gear 9 (Fig. 9) meshes with the rack h (Figs. 1, 2 3 and 4) as the rack fastened to' the spindle f will thru the pin' 71, is supported'by the spindle 2' (Figs. 1, '2, 3'and 4). 7 hand wheel a in one direction will transmit motion thru the worm d ,to the worm gear 6 ion'g} raise or lower the rack h and swing it around the center supporting spindle 5 thereby tilting the table which is fastened to the top, plate J to which the table frame (Fig. 11) is fastened. The top plate J is constructed with a sleeve Kprojecting down- 'wa'rd'into the hub KK of the casting or inclining segmental rack hlwhich. rests on I the ball bearing 11.

Inside ofthis sleeve is provided the stud OI SPIDCllG M (Fig.4) and as shown in, crosssection F 1g. 8.

This stud or spindle M is preferably made of a tubular construction toreduce the weight, and theupper end rigidly fastened in thehub of the top plate J. The clamping device shown in" cross section (Fig: 8)

consisting of the spindle N which is threaded on opposite endsi'one end for the biiid'ing lever o and the opposite end for the nut 79. The spindle N is provided with a shoulder Q, which by thegbinding nut 19 is rigidly clamped in thehub of the segmentcasting h" which is partly shown in cross section (Fig. 8). The binding lever 0 bearing against the bushing r compresses the cast-ingv which 1s slotted atthe shoulder of the spindle'N, and thus binds thespindle Mdthereby holding the tablein any position around theaxis of the spindle M.

The drawing board AA shown in longitudinalsection (Fig. 12) and cross section 6) is preferablymade of several strips or; boards, and isheld together by the steel channel shaped cleats fastened to the under side of the board, and the cleats B have an extended flange C (Fig. 7) atopp'osite ends of the board, which support the board on the metal frame. ,At thelower partof the channels BIin opposite ends of same,

there are square or rectangular holes D (Fig.

At one side ofthe board supporting frame there is a pair of angle shaped lugs E (Figs-5, 6 and 11).v These lugs fit into the holes D of thechannels B (Fig. 6). On

the opposite side there are similar lugs made adjustable by the screws F (Figs. 6 and 13) on the outer end 'of which is, fastened the knurled handles G (Figs. 1, 2,6, 7 12 and 13). These adjustable lugs are fastened to the plates H (Figs. 6, 7, 12 and 13) which are fastened .to the adjustable angle lugs by the screws I (Figs- 5 and 6). Theplates It is evident that turning the .H are' made so as to form a recess H (Fig. 6) which engages the opposite sides of the opening in the metal frame at H (Fig. 5). The screw lugs 'G (Figs. 6 and 7 rotatably support the screws F. It will be understood that adjusting the screws F outward will clamp the lugs E at opposite ends of the channels Bin the holes D, of same, thus holding the drawing board rigidly in the supporting frame and. reversing the opera tion, orunscrewing the screws F [will re lease the drawing board from the metal frame. Thus it will be'easy' to attach or detach the drawing boards from the metal frame, and exchanging one board for another very quickly.

The metal frame is made of light sheet steel,

but by the novel construction is very strong and rigid; the main section being made of one piece as shown in F ig. 12, which is formed in the shape of a'series of channels MM in the metal supporting frame, thereby pro-.

viding accurate means of supporting the T square onfanyof the four sides of the drawing board, but in this case, I prefer to use on the frontand back of the metal frame the woodstrips P (Figsf5, 6, 7, 11, 12 and 13) and these wo'odstrips to be "used the same as the metal angles on the ends of the frame if desired. The sides of the metal frame are constructed of the angles (Figs. 6 and 13) on which are attached the angles R(Figs. 5 and 13) and on these angles-are attached the Wood strips P (Figs/1,2, 5, 6, 7, 11 and 13). These anglesQ, are spotwelded or otherwise fastened to the main section MM. The end angles 0 reach the to theends of the side angles Q, and the edge or upper face of the end angles S. The side angles Q, in turn are spot-welded or] otherwise fastened to the flaps S on. the

ends ofthe channel member MM. Itw'ill Y 120 be thus understood that by. comparatively light weight sheet' metal, a rigid frame is provided,

all parts being spot-welded,

whole width of the'frame' and are fastened riveted or otherwise fastened together, and

thatthe'inaccuracy of the edges of a drawing board, due to the expansion and shrinking of the board, will have no effect on the accuracy 'of-the'work, as the board is rigidly held in the metal frame bywhich" the T- square or other instruments are controlled 1": I,

when in use.

The above description of providing means for fastening and clamping the top plate J which supports the table frame, (Figs. 11, 12 and 13) applies also to Figs. 14, 15

and 16 in which similar letters apply to similar parts, except where this construction 1s used the sleeve Y is used for a horizontal non-inclinable table, and the sleeve Z is used for a fixed inclined table.

What I claim is: i

1. A drawing table comprising a vertically disposed support, a horizontally disposed frame fastened to said support, said frame being formed of sheet metal bent to define a series of reversely disposed channels, T square guides carried by said frame, a drawing board detachably connected to said frame, and means for clamping said drawing board to said frame.

2. A drawing table comprising a vertically adjustable support, a horizontally disposed frame fastened to said support, said frame being formed of sheet metal bent to define a series of reversely disposed channels, angle irons fastened to opposite sides of said frame and forming T square guides,

' a drawing board. adapted to rest on said frame being formed of sheet metal bent to define a series of reversely disposed channels, angle irons fastened to opposite sides of said frame, wood strips fastened to said angle irons, a drawing board adapted to rest on said frame, said drawing board having cleats provided with apertures therein, lugs carried by said frame and adapted to engage in said apertures and means for movlng certain of said lugs thereby to fasten said board to said frame.

5. A. drawing table comprising a vertically adjustable support, a horizontally disposed frame fastened to said support, said frame being formed of sheet metal bent to define a series of reversely disposed channels, angle irons fastened about the sides and ends of said frame. one pair of said angle irons serving as guides for a T square, the other pair ofsaid angle irons having wood strips fastened thereto, a drawing board adapted to rest on said frame, and means for detachably connecting said board to said frame.

MARCELLUS REID.

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