US2928703A - Angle drafting group connection means - Google Patents

Description

March 15, 1960 P. L. PAULSEN ANGLE DRAFTING GROUP CONNECTION MEANS Filed Oct. 22. 1957 2 Sheets-Sheet 1 March 15, 1960 P. 1.. PAULSEN 2,

ANGLE DRAFTING GROUP CONNECTION MEANS Filed Oct. 22, 1957 2 Sheets-Sheet 2 1 Paul .5. Paula-n, I

States Patent ANGLE DRAFTING GROUP CONNECTION MEANS Paul L. Paulsen, Two Rivers, Wis., assignor to Hamilton Manufacturin Corporation, Two Rivers, Wis., a corporation of Wisconsin Application October 22, 1957, Serial No. 691,774

1 Claim. (Cl. 312-111) This invention relates to connection means for angle drafting group including an engineers desk and an angularly related drawing board stand.

It has been found that the increasing demands made upon the time and abilities of engineers and supervisory draftsmen has suggested the facilities grouping of the present category by which the occupant may turn alternately from a working desk to a drawing board at his side, or vice versa, as the needs of his work may dictate, without rising from his chair and merely by rotating the latter from one position to the other.

Inadequacies having been found to exist in prior structure of this class, the present invention aims to provide improvements in structure and organization that make the unit more practical, eflicient and economical.

The present invention makes possible the use of a relatively large drawing board with the group by providing improved means including a torque resisting element for supporting the board while permitting selective pivotal adjustments of the latter on its stand.

A further object of the invention is a flexible mounting for the drawing board stand on the desk that permits movements of the group as a unit on a floor plane for location purposes while providing a warning against lifting the drawing board stand relatively to the desk which might cause breakage.

A still further object is the arrangement of means for reversal of the drawing board stand from one side of the desk to the other and for reversal of the board mounting from one side of the stand to the other to suit engineering or drafting room floor layouts, thus contributing enhanced versatility and usefulness to the group.

These and other objects and advantages will be apparent from the following description, taken together with the accompanying drawings, showing an illustrative embodiment of the invention, and in which drawings Figure 1 is a front perspective view of the angle drafting group of the invention with the drawing board at approximately a fifty degree angle;

Figure 2 is a rear perspective view'with the drawing board in horizontal position;

Figure 3 is a reduced plan view of the group of Figs. 1 and 2, certain drawers being shown open and the board in vertical position, and'indicating in broken lines a reversed arrangement of the parts contemplated by the present invention, a users chair being also indicated;

Figure 4 is an enlarged perspective view showing details of the board support;

Figure 5 is an enlarged cross-section taken on the line 5-5 of Fig. 4 showing the flexible connection for the stand; and

Figure 6 is a fragmentary section taken on the line 6-6 of Fig. 4.

The angle drafting group with which the present invention deals includes the engineers desk 11 and ninetydegree related drawing board stand 12 mounted at one 2,928,703 Patented Mar. 15,1960

2 in the chair 13 (Fig. 3) may work at either the desk 11 or the drawing board stand 12 without rising from the chair and merely by rotating the latter, which may be of the conventional swivel type for that purpose.

In accordance .with the present invention, the stand 12 has the single pedestal 14 at its outer end from which extends in cantilever fashion a horizontal table member 15 that is flexibly attached to the desk 11 so as to be rigid with the desk in the plane of the latter while hav-. ing limited movement relatively thereto in a vertical plane transverse to the desk, for a purpose later pointed out. Such flexible attachment is here indicated by A showing a flexed positioned in dotted lines and illustrated in the drawings (see particularly Fig. 5) wherein a steel flexure plate 16 is shown fastened by screw bolts 17 along its upper edge to the desk wall 18 while being fastened by screw bolts 19 adjacent its lower edge to the wall 20 of the stand table member 15 contiguous with the desk wall 18. Nuts 21 for the screw bolts 17 and 19 respectively may be suitably secured on the inner faces of the walls 18 and 20 respectively so that the screws 17 and 19 may be inserted in apertures aligned with the nuts and tightened to secure the assembly. This flexible connection which in this instance has some resiliency, provides a warning against attempts to lift the stand 12 without at the same time lifting the desk 11. Such attempts would place an undue strain upon any rigid connection that might be used between the stand and the desk that would be likely to result in a destruction of the connection. The stand 12 is at the same time maintained rigidly at right angles to the desk 11 in the plane of the group at all times so as to define a chair receiving precinct in the corner between the desk and stand.

Mounted on the stand 12 along its inner edge, that is its edge nearest a person sitting in a chair 13, is the drawing board 22 which is desirably quite large as draw ing boards go, so as not to be unnecessarily limited in usefulness. For pivotal mounting of the' drawing board at this edge of the stand for angular movements of the drawing board in a vertical plane parallel to the desk 11, without interference with the desk, the stand has a pair of corner brackets 23 secured thereto by screws 24. Inner knuckle 25 of each of the brackets 23 is pierced to receive a trunnion 26 that is carried by each end respectively of a torque shaft 27 conveniently formed of pipe material. welded to the torque shaft 27 channel bars 28, these having fingers 29 that spanthe torque shaft and are- Channel bars 28 thus form the legs of channels 28 are shown secured to the board22 as by screws 30.

To support the drawing board 22 in selective angular positions on its pivot 26 with respect to the stand 12 there is provided a brace rod 31 that is articulated with one of the channels 28, preferably the outer channel as at 32, at one end, and at its other end passes through an elongated slot 33 in the table element 15 of the stand 12 and down into the pedestal 14 where it is releasably held by a clamping element (that may be of a. type well known in the art and which need not be here shown) controlled by a manually rotatable knob 34. By rotating the knob 34 in one direction the brace rod 31 may he slid to permit angular adjustment of the drawing board 22 and by turning the knob in the opposite direction the adjustment may be maintained. Such adjustment may be made through a ninety degree range, from the horizon- Between the brackets 23 there are a V 1 tal position of the board shown in Fig. 2 to the vertical position'ior 'the b'oardshown in Fig? 3".'i "It"will be noted from Fig. 1 that the board is so mounted on the channels 28. t its lqwe Q ree e eds; is s ew t e ed e i, r .L' i

is the rev 'ei ility"of t e'parts o fl ie *T" endjpre formed serew holes 35. (Fig "2). "are provided in the" desk I 11;"'for*examp1," in which the screws", 11 for the iiexure plate 16 'of the standmay he receivedwhen the latter is swung around as'indicated bythe arrow 36 from the'position shown in broken'line s in Fig. '3 which isits positio'ma's showniir'i Figs; l,2"a 'nd 4 to the full l ineposition' of Fig. ,3; In such re'versal, the drawing board 22"cari' also be" reversed on the? stand; to keep it" on"tlreinner edge of the stand, andtor this"pu'rpose the table element "1S{of the"standhas'pre-formed screw holes 37'byi whiehthe screws 24for the brackets 23 may enter the table element tof' support the brackets and with them tl ie torqueshaft 31 and channel members 28"for the board 22on"the reverse edge of'the'stand, which now becomes the inner edge o f the latter.

- Only one '33 in"the pedesal 14, is necessary but the direction ot the brace"rod31'rnust'be reversed to accommodate reversalfofthe stand 12 and forthis pur pqsethecontrolknob'fal is movedto' be received in the ire-formed aperture 38"therefor 'in'the face ,ofthe" pe destal' lk the channel 28 at theothe'r end ofthe board 22 havinga perforationas at 4Q for th'epin 32' the brace rod. V V sinc reversal of the drafting board stand as just describe shaft is carried, 'thu's st' catching d 1 necessary a "knee "hole in the opposite The entire desk base portion 45 below the parting line 45amay"beswuttg"around with'iespect' tdthei'em'aifidei of the desk for purposes of reversal of the drawers 46 and 47 to accommodate the reversal of the stand.

The units of the group may be carried on suitable feet 49 as clearly shown in the drawings.

So constructed and arrangedf'an angle drafting group Q mark d scr r e b y and ye sa l ty is pro ded, together with"'accoinmodation' tewariarions tafiborlayouts contributing-t0 economy and enhanced utility of space and draftingeq uipment.

The invention is not intended to be limited to details of construction shown for purposes of eigemplification. Furthermorefit maynerte essentiahthat all features of the invention beusedfconjointlyTsince various combinations or sub-combinations may at be advanta'ge ously employed,

he in enticn be. 2 Lb qla ai l' s Y "Inangl drafting group ernb s ee rom the d edes a njfsat t ey th i P YI mn 'PrQX 1 8 a a e'a i en were t am the fbmp n m a ffi xure' 6 o g s i lft ble "end andha s i i n bove the t bl 1 1

Images