Improvements in Combined Desks and Seats for Schools.
Year: 1889

page_text: Date of Application, 6th July, 1889
Complete Specification Left, 13th Mar., 1890-Accepted, 19th Apr., 1890
:
PROVISIONAL SPECIFICATION.
Improvements in Combined Desks and Seats for Schools.
We, JOHANN HINKLEIN and JOSEPH HAUSS of Frankenthal (Pfalz) in the Empire
of Germany, Manufacturers, do hereby declare the nature of this invention to be as
follows:
The object of this invention is an improved normal form for seating pupils at school
differing from similar devices heretofore known by its applicability and adjustability
to all sizes or ages of children and particularly adapted to meet all sanitary require-
ments of such seats.
The improved mechanism is enclosed between two frames or stands of iron or other
suitable material connected by means of a bar on which bears the seat jointed on
each side near one extremity of a lever which has its fulcrum at the opposite extremity.
The two levers are stiffened by means of a cross beam and each has jointed to it an
upwardly extending curved link connected hinge-fashion with the back of the form
wbich is adjustable by means of guide tubes and screws or otherwise on corresponding
rods provided on the stand. Each first mentioned or main lever has, at the centre of
the stiffening beam referred to, a pivot carrying a link which is with its other
extremity connected hinge-fashion with another lever revolvable about the bar con-
necting the frames. The last mentioned lever, on one side of the stand, is elongated
backwards and carries at some distance from its rear extremity, movable about a
pivot, an upwardly extending regulating link having at its top end a bolt adapted to
be placed into one of a suitable number of corresponding recesses provided in a guide
slot of the stand. A screw-bolt accessible from outside and guided in a corresponding
slot in the stand is revolvable in the lever carrying the regulating link. This bolt
when entirely screwed in, establishes the connection of said carrying lever with
another lever which is attached to a tube surrounding the connecting bar and movably
connected with a lever, the other extremity of which is attached hinge-fashion to the
table at the back of the frames. The table is vertically adjustable on each side by
means of a guide rod movable in rings or tubes attached to the stand and adapted to
be fixed by means of screws or otherwise. The table is capable of being folded up
and fixed in its relative position by means of a screw bolt, and has a suitable book
shelve attached underneath to its stationary part.
11
T 1
1000
HUELSER & Co.,
COMPLETE SPECIFICATION.
Improvements in Combined Desks and Seats for Schools.
We, JOHANN HINKLEIN and JOSEPH HAUSS of Frankenthal (Pfalz) in the Empire
of Germany, Manufacturers, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
This invention has for its object to provide a combined seat and desk for schools,
the desk, seat and back of which can at the same time be so adjusted in a simple
manner by the mechanism provided as to allow the whole to be made in one size only
and nevertheless to be employed for pupils of the first year as well as for such of
later standards.
Owing to this arrangement, the single classes can at any time easily change rooms;
the combined desks and seats remair in their places and need only be properly
adjusted to suit the age of the pupils whom they are to seat, the adjustment of seat,
back and desk requires but little time and can be soon effected by a single person,

page_text: desired position. Also for weak or bodily backward children, the improved piece of
school furniture is easily adjustable in desk, seat and back.
As will be seen from the following description, provision is made to prevent
unauthorized persons from effecting any alteration in the relativo position of the once
adjusted single parts of the combined desk and seat, which is comparatively simple in
construction.
Referring to the accompanying drawings, Sheets I and II, in which like letters
denote like parts,
Fig. I is a side view of the improved device with the ommission of one of the metal
or other stands or frames,
Fig. II is a front view from the side of the desk,
Fig. III a plan,
Fig. IV is a side view and partial section on a reduced scale of a modification of
the improved device showing the mechanism as occupying its mean position.
Fig. V is a view to Fig. IV from the side of the seat.
Fig. VI represents a detail.
The whole mechanism rests between the two stands or frames x x of iron or
other suitable material, which are connected with each other by beam or bar f. The
seat a adapted to be turned back is revoluble about pivots q which are provided on
the levers h, adapted to turn on bolts i, and is determined in its movement by said
bar f. The levers h are stiffened by a cross beam and carry the levers n revoluble
about and connected at n' hinge-fashion with the back b, which is displaceable by
means of guide tubes 6' on rods u provided on the stands and can be fixed in any
desired position by aid of clamping screws u¹.
With the levers h, one of which is provided at each stand a, are connected the
levers m movable about h² and jointed with their other extremities to levers o
revoluble about bar f. One of the said levers o at one of the stands is elongated
rearwardly, Fig. 1, the elongated. portion carrying, revoluble about o¹, an adjusting
lever p, which is provided at the top end with a bolt or pin v corresponding to the
bights or indents ³ of a guide slot provided in the stand. As hereafter described,
the position of said bolt v¹ according as it is placed into the one or the other of said
indents, which may be provided outside with numerals corresponding to the classes,
determines the position of the seat back and desk. A screw bolt guided in an
opening of the stand and accessible at q from the outside of the stand can be turned
in the lever.o and, when entirely screwed in, establishes the connection of the latter
with the lever p provided on the tube f¹ surrounding the bar or beam f, Fig. III.
These levers are movably connected at r with the levers p¹, which at their other ends
are connected hinge-fashion with the desk leaf c, the latter is provided with guide
rods s adapted to be shifted up and down in eyes s² of the stands and fixed in any
desired position by means of set screw. The leaf can be turned up about o¹ and
fixed in the position shown in the drawing through screw bolts .c². The hook shelve e
is secured to the stationary portion of the desk as shewn in Figs. I and II. In the
drawing the seat back and desk are represented as occupying their lowest position, the
bolt resting in the lowermost bight or notch of the stands.
To displace the seat, back and desk jointly, the set screws u¹ and s³ are loosened,
the bolt or set screw o is screwed inwards and thereby brought in connection with
the levers p². Subsequently the desk frame is seized with the left hand at the seat-
adjusting side and the bolt of the adjusting lever p with the right hand, and the

page_text: せ
two drawn up, thereby the levers p and p¹ draw up the levers p² and.o revoluble
about, the lever o taking along, through lever m, the levers h movable about i.
The seats, which are revolubly secured to the. levers h, are, .consequently likewise
raised and at the same time also the backs, which are jointed at h! to lever h through
lever n.
The bolt is then, according to requirement, introduced into, one of the
notches of the stand; which are numbered 1, 2, 3, 4. etc. corresponding to the age
of the pupils, and finally the set screws are tightened.. If. only the seat and, back
are to be displaced and the desk.to remain high, the set screws is kept, tightened,
while the set screws u' and q i.e. the lever connection: op² are loosened. The
back is seized with the right hand and the bolt of the adjusting lever with the left
and both are drawn up and the bolt introduced into the respective notch or bight
of the stand. During this experiment only, the levers. p, o,. m hand. n come in
action and consequently only the seat and back are moved...
of
When the improved device occupies the position, shown in Fig. I, the desk can
also be displaced independently by. leaving the set screw.ù tightened, but loosening q
and and then simply drawing the desk. up. The latter, is; guided by means
rod in the eyes and only the lever. device. p, p, fi is brought into action.
When in the desired position, the desk is fixed, together with the guide rods, by
means of screw s³.
The last mentioned mechanism may also be simplified as follows, without affecting
the adjustability of seat, back and desk :-
Referring to Figs. III, IV and V, which illustrate this modification, the guiding
contrivance for the back, consisting of rods u and tubes 6', is replaced by the guide
bars 6 cast or otherwise secured to the side frame at the same angle as the above
spindle guiding, on which bars slides the back b slide-fashion in its guiding b².
The guidings of back and seat are illustrated in horizontal section by Fig. 111.
The stand is provided with notches or bights t' arranged so as to correspond to
the single classes. The back b can be fixed in any suitable position by means of the
set screws u guided in the slots t².
The
The spindle guiding of the desk frame is replaced in a similar manner.
stand may serve as a substitute for the guide rods s of the desk frame c and the
eyes and have, as for the back, guide bars c cast or otherwise secured thereto,
on which the book shelve c² combined with the desk carrier c slides with its
guidings c, and can be fixed in their position by means of the set screw & guided in
the slots s³.
The following parts of the construction illustrated by Figs. I to III are dispensed
with:-
The levers hand o with connecting levers m, and the levers p'. The shortened
adjusting lever p is employed on both sides and adapted to move hinge-fashion in
at the desk frame c. The connecting levers n serve at the same time as adjusting
levers for the seat and back.
When the seat and back are to be placed higher, first the set screws u¹ are
loosened on both sides. Subsequently the back is drawn up on each side with one
hand, while with the other hand the bolt t of the adjusting lever n¹ is seized and
placed in one of the notches or hights t¹ of the stand which are numbered corre-
sponding to the different classes. Thereby the rod 9 guided in the slots g', is
raised through the lever connection on which rod the seat is lodged and has its
turning point.
The fixing of the desk is effected in the same manner as that of the back.
All set screws are arranged for a detachable key so as to prevent unauthorized
persons from changing the relative position of the desk, seat and back.
Having now particularly described and ascertained the nature of our inven-
tion and in what manner the same is to be performed, we declare that what we
claim is:-
In an adjustable combined desk and seat for schools.
Tilam ₤1 m8 ml dental to turn about heam or har f

page_text: for the purpose of allowing the desk adapted to be guided by rods s and fixed by
set screws s², or the seat a to be displaced at the same time with the back b guided
by rod u, substantially as set forth.
2) The application of a lever system f¹ 661 adapted to turn about beam or bar f
and to be rigidly combined by set screw or bolt with a lever system n, h, m, o, p,
adapted to turn about beam and bolt i and to be fixed by set screws u¹ and sin
any position given to desk, seat and back by causing bolt v of rod p to rest in any
of the notches ² of the stand, for the purpose of allowing the seat, back and desk
to be displaced jointly substantially as illustrated and described.
3) The application, as a substitute for the guiding of back and desk through rods u
and s and eyes, of guide bars 63 and provided on the side stands a, guidings 62
in the back, and guidings c in the desk carrier, substantially as set forth.
4) The combination with the levers f¹ p² p' and p-levers h m and o being
omitted, of bolts v and t and guide slot t for the purpose of allowing the desk to be
displaced independently in the notches by the adjusting lever and bolt v, and
the seat and back to be displaced jointly by means of bolt t in the notches t¹ of guide
slot for the back through the adjusting lever n connecting seat and back,
substantially as illustrated and described.
1
101 1
2000
JOHANN HINKLEIN.
JOSEPH HAUSS.
By Huelser & Co.,
142, Fleet Street, London, Attorneys.
JOHANN HINKLEIN.
JOSEPH HAUSS.
By Huelser & Co.,
142, Fleet Street, London, Attorneys.