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Publication numberUS520702 A
Publication typeGrant
Publication dateMay 29, 1894
Filing dateSep 11, 1893
Publication numberUS 520702 A, US 520702A, US-A-520702, US520702 A, US520702A
InventorsSchool Desk
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
School desk and seat
US 520702 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

(No Model.)

A. J'.- PALMBBRG. SCHOOL DESK AND SEAT- Wig E 55 E5. L/ S Q @www @www


v3-3 shown in Fig. 2.





SPECIFICATION forming part of Letters Patent No. 520,702, dated May 29, 1894.

PPIGMIOD filed September 11, 1893. Serial No.485.236. (No model.)

To a/ZZ whom t may concern:

Be it known that VI, ANDREAS J. PALMBERG, a citizen of the United States, and a resident of Boston, in the county of Suffolk and State of Massachusetts, have invented new and useful Improvements in Adjustable School Desks and Seats, of which the following, takenv in connection with the accompanying drawings, 1s a specification.

This invention relates to improvements in adjustable school desks and seats and it is carried out as follows, reference being had to the accompanying drawings, wherein- Figure l, represents a side elevation of the Fig. 2, represents a vertical section on the line 2-2 shown in Fig. l. Fig. 3, represents a longitudinal section on the line Fig. 4, represents a vertical section .on the line 4 4., shown in Fig. l. Fig. 5, represents a horizontal section on the line 5-5, shown in Fig. 3; and Fig. 6, represents a detail side View of the key for unlocking the bolts by which the' desk or its seat is held in position. i

Similar letters refer to similar parts wherever they occur on the different parts of the drawings.

In the drawings A represents the desk base having standards B. B in which the uprights C. C of the desk are vertically adj ustable. In practice I prefer to secure to the uprights C. C a cross beam or lateral support C to the rear portion of which is hinged at d the desk top D as shown.

E is an ink stand of any desired size or shape which is retained in a recess C in the cross beam C and having its upper portion or neck projecting upwardly through a perforation D in the hinged desk top D as shown in Fig. 1, by which arrangement the said desk top may be swung upward to allow the scholar t0 take his seat or leave it without danger of spilling the ink contained in the ink stand.

The uprights C. C of the vertically adjustable desk are connected together by means of a Vertical back Ca which is adapted to be automatically forced upward when released by the infiuence of a suitable spring C5, one end of which is attachedto the base A. and the other end to the vertically adjustable back C3 as fully shown in Figs. 2 Aand 3.

F. F are spring pressed and laterally expansive locking bolts arranged in suitable guides on the adjustable back or desk support C3 and having their outer ends passing through perforations in the uprights C. C and adapted to lock into notches or recesses b, b, b, on the interior ofthe standards B, B as shown in Fig. 2. v

The bolts F. F are automatically held in their outward locked positions by the influence of suitable spring G as shown in Figs. 2 and 3. The inner ends of the locking bolts F, F are provided with lips 0r projectionsf, f adapted to be actuated by the key H shown in Fig. 6, said key having a central pivot h, adapted to be inserted in a hole or recess C4 in the desk support C3. vided with side projections Il', H', by means of which the lips ff are actuated for releasing the bolts F. F whenever it is desired to vertically adj ust the position of the desk. All that is necessary to do for this purpose is to insert the pivot 7L, of the key into the notch 0r recess O4 when the key projections H', H',

will be located outside of the bolt lips f, f and by turning said key to the right the said bolts will be withdrawn from their locking recesses b, hin the standards B,B thus permitting'the desk and its connections to be vertically adjustable to suit the height of the scholar for which it is to be used.

yI represents the base of the adjustable seat, and said base is longitudinally adjustable in guides in the desk base Ato and from the desk so as to enable the said seat to be easily adjusted to and from the desk according to the size or stoutness of the scholar that is to use the adjustable desk and seat. After the seat frame has been adj usted relative to the desk it is only necessary to secure it in position preferably by means of set screws t', c', going through slotted perforations i', t', in the adjustable seat base I as shown in Figs. 2, 3, 4., and 5.

K is a iioor secured in a suitable manner to the adjustable base portion I and adapted to serve as a support forthe feet of the scholar.

Said ioor is preferably made removable so as "to permit free access to theladj usting screws t' t' in adjusting the position of the seat in a horizontal direction to and from the desk.

The key His prof IOO L. L are standards seeuredto the adjustable frame I in which the uprights M M of the seat N are vertically adjustable, said uprights being connected by a back Wall M. The said seat is automatically raised when released by the influence of a spring O, secured by one end to the back M and by the other end to the lower base portion of the standards L. L in a manner similar to that described for raising the desk.

For locking the seat in position after it has been vertically adjusted, I use a mechanism similar to that used for locking the desk in position after being similarly adjusted and I have for this purpose shown a pair of spring pressed locking bolts P, P, passing through perferations in the seat uprights M, M and adapted to enter notches or recesses Z,Zin the guides or standards L, L as shown in Fig. 4. The bolts P, P are automatically held in their expanded locked position by the influence of a suitable spring Q, as shown in Fig. 4.

The inner ends of the locking bolts P,P are provided with lateral lips or projections 2 5 19,19, and between the same is made a perforation m similar to the perforation C4 in the back of the desk support C3 for receiving the center h, of the key II, which serves for the purpose of unlocking the bolts P, P in the same manner as described relative to the unlocking of the bolts F, F on the desk support. It will thus be seen that the desk is vertically adjustable as is also the seat and the latter is horizontally adjustable relatively to the desk.

The desk top is hinged as described and adapted to inclose and protect the ink stand so as to prevent the latter from being accldentally overturned, the Whole being constructed and arranged substantially as and for the purpose hereinabove described.

Having thus fully described the nature, construction, and operation of my invention, I Wish to secure by Letters Patent and claim- In a school desk or seat, the combination of standards notched on their inner sides, a vertically adjustable desk or seat provided with uprights guided in said standards and having oppositely arranged slidin g bolts provided upon their adjacent ends with hookshaped projections extending in opposite directions and adapted to be engaged by a forked key to retract said bolts, a spring arranged between the bolts and operating to force said bolts outward inte engagement with said notched standards, anda spring for raising said desk or seat, substantially as described.

In testilnony whereof I have signed my name to this specification, in the presence of two subscribing Witnesses, on this 31st day of August, A. D. 1893.




Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2531233 *Apr 28, 1948Nov 21, 1950John H PettitVertically adjustable table
US4292903 *Nov 2, 1979Oct 6, 1981Hockema Robert JAdjustable box stool
US5409296 *Jun 6, 1994Apr 25, 1995Shelby Williams Industries, Inc.Adjustable length support base for a seat assembly
US6439657 *Feb 25, 2000Aug 27, 2002Alan L. TholkesSynergistic body positioning and dynamic support system
US6702372 *Jun 24, 2002Mar 9, 2004Health Postures, Inc.Synergistic body positioning and dynamic support system
US6726276 *Feb 25, 1999Apr 27, 2004Health Postures, Inc.Synergistic body positioning and dynamic support system
US9532655 *Jan 20, 2014Jan 3, 2017Stylgame S.R.L.Sliding seat, in particular for gaming stations
US20150289662 *Jan 20, 2014Oct 15, 2015Stylgame S.R.L.Sliding seat, in particular for gaming stations