Improvements in School Desks.
Year: 1893

page_text: Date of Application, 22nd Apr., 1893
Complete Specification Left, 22nd Jan.. 1894-Accepted, 24th Mar., 1894
PROVISIONAL SPECIFICATION.
Improvements in School Desks.
WILLIAM WALKINGTON St. Albans Works Skinner Lane of the City of
Leeds in the County of York Engineer, do hereby declare the nature of this
invention to be as follows:-
It consists of an improved mechanical arrangement designed to raise, or lower,
vertically, school desks, so that they may be adjusted to suit the different sizes of
children useing them. It is also arranged so that the desk can be altered from the
horizontal to a suitable angle for writing and etc., and it can be moved back from
the angle to the horizontal for kindergarten or other table uses. According to
the present invention I attain this object by making the desk bearer to form a
slide, and toothed rack, into the rack gears a toothed pinion, mounted on a shaft
fit into suitable bearings, on the main standard, which main standard also is
arranged to receive the slide and rack. By turning the shaft with a lever or key,
the pinion causes the slide and rack to rise, or lower, vertically as may be required.
On the top of the desk bearer and toothed rack, is formed a joint, or hing, to
which is fixed the desk.
The hinges are made with a piece of metal hanging down corresponding with a
piece cast on the slide, and rack, these have slots oblong holes, into which fits a
spring bolt. When the desk is lifted to the angle desired the spring bolt shoot into
the slot holes, and hold the desk in the angular position, and by releasing the bolts,
the desk falls to the horizontal position.
If preferred in place of the spring bolts the desk may be raised by excentrics,
keyed on to a shaft, which by revolving will either raise or lower the top of the
desks to the required angle.
Dated this 21st day of April 1903.
WM. WALKINGTON,
St. Albans Works, Skinner Lane, Leeds.
CONTLEIE DIEUIFICATION.
Improvements in School Desks.
WILLIAM WALKINGTON, Engineer 69 Skinner Lane Leeds in the County of
York 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 :-
It consists of an improved mechanical arrangement designed to rise or lower
vertically school desks or seats so that they may be adjusted to suite the different
sizes of children useing them.
It is also arranged so that the desk can be altered from the horizantal to a
suitable angle for writing &c. and it can be moved back from the angle to the
horizantal for kindergarten or other table uses by means of a spring bolt which
fixes both ends at one opperation.
If prefered in place of the sprind bolt the desk may be raised by exentrics
keyed on to a shaft which by revolving will rise, or lower, the top of the desk, to
the required angle.
According to the present invention I attain this object by making the desk
bearer to form a slide and toothed rack, into the rack gears a toothed pinion

page_text: mounted on a shaft, fit into suitable bearings, on the main standard which main
standard also is arranged to receive the slide and rack. By turning the shaft
with a lever or key the pinion causes the slide and rack to rise or lower vertically
as may be required. On the top of the desk bearer and toothed rack is formed a
joint, or hinge to which is fixed the desk. The hinges are made with a piece of
metal hanging down, corresponding with a piece cast on the slide and rack, these
have slots or oblong holes into which fits a spring bolt. When the desk is lifted
to the angle desired the spring bolts shoot into the slot holes and holds the desk
in the angular position, and by releasing the bolts the desk falls to the horizontal
position.
Figure 1. is end elevation of school desk, dotted lines shows desk raised to full
height.
Figure 2. is front elevation.
Figure 3. is front elevation of desk bearer, slide, rack and joint.
Figure 4. is end elevation.
Figure 5. is plan of spring bolt and edge of spring bolt showing spring.
Figure 6. shows excentric and joint.
Similar letters in all figures, indicate similar parts.
Figure 1 and 2.
a. shows desk bearer slide and rack. b. shows pinion shaft.
c. pinions keyed on shaft. d. nuts for fixing slide.
Figure 3. a. shows desk bearer, slide spring and rack with joint attached for
spring bolt.
Figure 3 shows ecentric attached to desk bearer.
to horizontal, for kindergarten or table uses. f. is
G excentric. H spring.
e.
joint for altering the angle
slot in front for spring bolt.
Having now particularly described and ascertained the nature of my said inveu-
tion, and in what manner the same is to be performed, 1 declare that what I
claim is :-
1. The arrangment as herein described for rising the desk or seat.
2. The arrangment of the spring bolt for tilting to the angle.
3. The same combination of rack and pinion for raising the seat.
Dated this 20th day of January 1894.
WM. WALKINGTON.