Year: 1888

page_text: I, FRANS THEODOR SELANDER, of Gothenburg, in the Kingdom of Sweden,
Engineer, 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:
My invention relates to adjustable school-desks, and it comprises the improvements
hereinafter described.
In the accompanying drawing ;-
Figure 1 is a side elevation of a desk constructed according to my invention.
Figure 2 is a rear elevation of the same; and,
Figure 3 is a plan.
a,
Figure 4 is a section of the school-desk through its seat on the line b
figure 3.
Figure 5 is a section on the line c, d Figure 1, of part of the top and side of the
desk, and
Figure 6 is a view of a detail.
:
The top of the desk consists of two parts A and B united by means of binges C so
that the part A may be raised. The entire top of the desk may be drawn forward or
pushed back as indicated by the dotted lines in Figure 1, the upper part B being
provided with guides D, Figures 5 and 6, sliding upon the bars E fixed to the sides of
the desk.
The movement of the top of the desk can be regulated by means of a tongue F
adjustable in a slotted bar G fixed at the outer side of the desk immediately under the
top, which tongue is adapted to engage with a slot in a plate H fixed under the
sliding top when the flap is opened and drawn forward so as to bring the plate H
directly above the tongue F.
In the part A of the tongue of the desk there is a flap I which is pivotted on
pins K fixed in the surrounding frame and may be raised as indicated by the dotted
fines in Figure 1. In this position the flap I is supported by a strut L located in the
rebate of the flap, the ends of the strut being secured in the sides of the flap. By
means of the said strut any inclination desired may be imparted to the flap.
- n
.

page_text: ·
The seat consists of two parts M and N which are constructed of tongues and corre
sponding grooves, as shown in figure 3, so that both parts may be pushed more or
less into each other. In order to change the length of the seat, it has beneath it a
screw which is carried at the ends by one part of one seat and engages with a nut,
fixed to the other part.
The entire seat is secured to a frame P located between uprights and which may,
by means of a screw P¹, be raised or lowered between the said uprights, being guided
by means of ribs P2 fixed at the inner sides of the uprights. The seat is united to the
frame by means of pins Q which, being fixed to the seat are passed through the parts R
projecting from the frame, so that the seat may be lifted up."
The back S may be raised or lowered by means of a set screw S¹ which retains it in
position.
A foot-board T is provided which is guided between the parallel ribs T1 and T2.
This foot-board may be raised or lowered by a screw U passing through a guide-
bar U¹ fixed on the stool at an angle to the guide-bars or ribs of the foot-board and
through a nut fixed on the foot-board.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what I
claim is :-
1. An adjustable school-desk, the top of which is provided with a
flap and is
movable on guides fixed at the sides of the desk, its motion being determined by an
adjustable tongue, secured to the top, the said flap consisting of a frame carrying
another pivotted flap which may, by means of struts, be adjusted in the required
inclination.
2. An adjustable school-desk, the seat of which consists of two parts, one of which
is adapted to be moved by means of a screw in grooves of the other, the pivots of the
pivotted seat being fixed in a frame movable vertically in guides at the sides of the
stool and adapted to be adjusted by means of a screw.
3. An adjustable school-desk provided with a foot-board resting upon bars fixed at
the sides of the table and of the stool and capable of being raised and lowered thereon,
the said foot-board being maintained at any required height by a screw passing through
a slot in a bar fixed to the stool and at an angle to the guide-bars or ribs of the foot-
board and through a nut fixed at the foot-board.
Dated the 21st day of July 1888.