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Publication numberUS1731375 A
Publication typeGrant
Publication date15 Oct 1929
Filing date29 Jan 1927
Priority date30 Jan 1926
Publication numberUS 1731375 A, US 1731375A, US-A-1731375, US1731375 A, US1731375A
InventorsEngers Arnold
Original AssigneeEngers Arnold
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Combined adjustable desk and seat
US 1731375 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

Oct. l5, 1929. A. ENGERs 1,731,375


KM Morney.

latented Oct. 15', 1929 UNITED STATES PATENT oFFlcE ARNOLD ENGERS, F ROTTERDAM, NETHERLANDS (lOllllBIhTllD` ADJUSTABLE DESK AND SEAT Application filed January 29, 1927, Serial No. 164,391, and in the Netherlands January 30, 1926.

My invention has for its object an improved combined adjustable desk and seat of the type in which there is provided an operating mechanism, by means of which, when adjusting the desk, the seat is automatically raised or lowered along an inclined guideway. Y

Another object of the invention is a com-- bined desk and seat of the type referred to which, as compared with'known construcjo tions, is distinguished by great simplicity justing the desk,

Y and, therefore, comparatively low cost of 'manufacture According to my invention the construction is so `designed that, when vertically ada movement is imparted t0 a cable or the like drivingmember, the latter being so connected to the seat that the seat is adjusted simultaneously and in the same sense as the desk, that is to say, when raising kthe desk the height the usable width Y dependently necessary in of the seat as well as the space between the seat and desk are simultaneously increased in the required proportions and vice-versa. e

According to al preferred embodiment of 5 the invention the desk is provided with a support arranged to slide in vertical guideways and carrying a rack engaging a rotatable, but otherwise stationary pinion adapted to be locked,said pinion being connected to a cablepulley, sprocket wheel or the like, on which runs a cable rope or the like driving member, the ends of which are guided by idle rollers and are so connected to the seat that, when rotating the pinion so as to cause vertical adley or sprocket wheel on the axis of the pinion andproviding said pulley or sprocket wheel with aseries of holes placed in a cirj ustment of the desk, the seat is raised or lowcle concentrically with the axis of thepinion,

said holes being adapted to co-operate, by means of a pin or the like, with a correspondingly arranged series of holes in the pinion.

Theinvention will now be describedy in detail with reference to the vaccompanying drawings, in which Fig. 1 is a sectional elevation o-f the apparatus according to the invention,

Fig. 2 is a sectional plan on the line II-II of Fig. 1,

Figs. 3 and 4 are details of a modification on a somewhat larger scale, and Y Figure 5 is a substantially transverse sectional view taken on a plane just below the seat. Figure 6 is a substantially transverse sectional view taken on lines VI-VI of Figure 1.

The uprights 1, supporting ythe desk, are vertically slidable in channel irons Qconsti- `tuting a part of the side frames of the apparatus. One of the uprights 1 carries a rack 3 engaging a pinion 4. keyed to the shaft 5. The shaft 5 extends lengthwise of the apparatus and at its other extremity carries an identical pinion engaging a second rack secured to one of the uprights of the desk in Vsuch a manner that, by rotating the shaft 5 by means of a crank 6 or the like, the'desk may be raised or lowered without any risk of being jammed. Adjacent to each pinion 4 there is provided on lthe shaft 5 a ratchet Wheel 7 (zo-operating with a pawl 8 pivotally mounted on a stationary plate 9 in which the corresponding end of the shaft 5 is journaled. By means of this mechanism the shaft 5 is prevented from rotating in an opposite direction under the weight of the desk.

Against the inner face of each side member of the desk there is provided a bell-'crank lever 10, one arm of which is pivotally and slidably connected to the sliding top 11 of the desk by means of a pin and slot connection, whilst the other armv of the bell-crank lever 10 is connected, by means of a pivotable link 12, to a fixed point, all in such a manner that, when vertically raising or lowering the desk by means of the racks 3 and the pinions 4, the bell-crank levers 10 are displaced and the top 11 is slid outwards or inwards. The

plate 13 is connected at its front by two uprights 13', to the top 11 of the desk and slides on the plate 14, while being guided by the side members 132 of the desk. At the rear, the plate 13 is connected with the top 11 by a sliding panel .133 running in grooves 2 of the stationary uprights 2.

In the case of the embodiment shown in Figures 1 and 2, adjacent each pinion 4 is provided on the shaft 5 a cable-pulley 15 encircled by a cable or rope 16.` The cables 16 are guided by idle rollers 17 and bytheir ends are connected respectively at the upper and lower ends of a plate 18 sliding along the back of the inclined guideways 19 and which is connected to the side frames 2O carrying the seatv 21. rllhe guideways 19 in this case are also channel irons constituting a part of the stationary side frames of the apparatus. The back 22 of the seat is supported by arms 23 the lower ends of which are bent inwardly Cil and downwardly and are slidable in stationary inclined guideways 24 carried by the frames 20. Each arm 23 is moreover actedl upon by a lever 25, one end of which is pivotable about a fixed point 26, whilst the other end engages a pin 23 on the corresponding arm 23 by means of a slot 27. The lever 25 is moreover slidably connected to a portion of the seat, e. g. by passing said lever through an opening in the plate 18. i In conclusion the side frames 20 of the seat may be provided with ratchet bars 29 cooperating with a spring-controlled pawl 30 for supporting` the seat. The pawls 30 are preferably mounted on a common shaft in such a manner that they may be put out of action simultaneously for releasing the seat when the same has to be lowered.

When by rotating the shaft 5 the desk is raised, e. g. to the position shown in dotted lines, such movement will be transmitted, by means of the cables 16, to the plate 18 in such a manner that the latter is moved same time the back of the seat is correspondingly raised as is clearly shown in Fig. 1. By rotating the shaft 5 all dimensions of the apparatus are adjusted in exact proportions.

Figs. 3 and 4 show details of a modified form of the operating gear, the latter being ,D so designed that, 1f necessary, the desk may be re-adj'usted independently of the seat.

According to this modification the cablepulley 15, which in this case is arranged near the outer end of the shaft 5, is free to rotate on said shaft 5, and is provided with a series The pulley 15 is normally secured to the Y pinion 4 by means of a pin 33 passing through a hole in the pulley and a correspondingly disposed hole in the pinion, so that, when rotating the shaft 5 by means of the crank 6, the pulley is carried on by the pinion and the seat is adjusted accordingly. The front plate 9 is provided with openings to clear the holes in the pulley and enableV the pin to lbe Vinserted therein. l

In other respects lthe construction' of the apparatus is identical with that of the embodiment shown in Figs. 1 and 2. When the pin 33 is inserted the pulley 15 `is connected to the pinion, so that by operating the handle or crank 6, the desk and the seat are adjusted simultaneously. f

ln case for some reason or'other it is necessary to re-adjust the desk" with respect to the seat, the pin 33 is withdrawn so that the shaft 5 can be rotated without rotating the pulley. As soon as the desired position is obtained, the pin 33 is again inserted in any two holes 31, 32 which are in alignment. lt is clear that, if desired, more vthan one pin may be provided or that theV pin or pins may be permanently withdrawn and only inserted when it is necessary tol adjust the apparatus.

Itis further to be understood that all parts` of the mechanism are so encased that they are protected from unintended operation.

What I claim is: A

1. ln combination, a frame and a desk supported for upright adjustment in said frame, a rack for the desk, a pinion in mesh with the rack and mounted in the frame, a pulley to turn with said pinion, inclined guideways forming part of the frame, a seat supported in said guideways, and a cable disposed over said pulley and its ends connected to the seat, whereby rotary movement of the pinion to elevate the desk imparts simultaneous movement to the seat through the said cable connection.

2. A combination desk and seat as claimed in claim 1, in-which the inclined guideways are provided with a detent and the seat is provided with a tooth extension to be engaged by the detent.

shaped frame, a pinion and pulley mountedin one arm of the frame, a deskmounted for upright adjustment in the same arm and having a rack to engage the said pinion, inclined guideways forming part of the other arm of the frame, aseat supported for yadjustment on said guideways, pulleys at the angles of the frame and at the free end ofthe arm supporting ythe seat, and a exible cable forming.

12o 3. In combination, a' substantially U- a continuous element with the seat and disposed about all of said pulleys, whereby simultaneous adjustment of the desk and seat will take place upon rotary movement being imparted to the pinion and pulley.

4. A combination desk and seat, as claimed in claim 1, including means for detachably connecting the pulley to the pinion, whereby adjustments of the seat and desk may be made independently.

5. In combination, a frame and a desk supported for upright adjustment in said frame, means for elevating said desk, a wheel operated by said desk-elevating means, inclined guideways forming part of the frame, a seat supported in said guideways, and a flexible connecting-member disposed over Said wheel and having its ends `connected to the seat, whereby movement of the elevating means to raise the desk imparts simultaneous movement to the seat through the said flexible conneetion.

In testimony whereof I affix my signature.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3118705 *2 Nov 196021 Jan 1964Skrivrit AbAdjustable desk and chair
US3622199 *12 Dec 196923 Nov 1971Su Shian HoAdjustable desk and chair combination
US5054852 *30 Aug 19898 Oct 1991Tholkes Alan LUtility station with controlled seating
US5098160 *30 Jan 199024 Mar 1992Moore Susan GErgonomic seating system apparatus
US81048358 Jul 200831 Jan 2012Invacare Corp.Standing frame with supine mode
US812366416 Jan 200928 Feb 2012Invacare Corp.Seat
US838850524 Feb 20125 Mar 2013Invacare Corp.Seat
US856780824 Sep 200929 Oct 2013Altimate Medical, Inc.Modular standing frame
US90790894 Feb 201314 Jul 2015Altimate Medical, Inc.Seat
US9254037 *3 Jul 20139 Feb 2016The Texas A&M University SystemVersatile student desk
US94743779 May 201325 Oct 2016Safco Products Co.Upright active-sitting seat
US980147223 Sep 201631 Oct 2017Safco Products Co.Upright active-sitting seat
US20090186747 *16 Jan 200923 Jul 2009Invacare CorporationSeat
US20100007180 *8 Jul 200814 Jan 2010Invacare CorporationStanding Frame with Supine Mode
US20100013276 *24 Sep 200921 Jan 2010Altimate Medical, Inc.Modular standing frame
US20100194155 *24 Apr 20085 Aug 2010James DankovichMobile integrated self-contained workstation
US20100201165 *21 Apr 201012 Aug 2010James DankovichErgonomic work station
US20140008943 *3 Jul 20139 Jan 2014Mark E. BendenVersatile Student Desk
USD7410736 Aug 201420 Oct 2015FocalUprightFurniture, LLCUpright seat
U.S. Classification297/172, 297/344.13, 297/195.13, 108/147
International ClassificationA47B39/02
Cooperative ClassificationA47B39/00, A47B39/02
European ClassificationA47B39/02