Improvements in School Slates.
Year: 1893

page_text: Date of Application, 27th Dec., 1893
Complete Specification Left, 4th Aug.. 1894-Accepted, 8th Sept., 1894
We, JOHN HILTON, of 19, Queen's Road, Clothier, GEORGE COLLINS HILTON,.
of 30, Barker Street, Clothier, and EPHRAIM JACKSON, of 102, Library Lane,.
Mechanic, all of Oldham, in the County of Lancaster, do hereby declare the nature
of this invention to be as follows:-
This invention relates more particularly to an improved construction of school
slate frame and has for its object to render the same in its joints much stronger
without the use of metal plates or staples, so as not to be liable to give way and
fall to pieces as heretofore has been the case.
This we accomplish by forming the frame ends to be joined respectively on each
side crosswise with a groove or recess and two tongues adapted to interlock with
the said grooves or recesses a pin being passed through the said tongues and
grooved or recessed part of the respective frame ends.
It will thus be understood that by interlocking the frame ends as described double
support and resistance is offered in any direction.
Dated this 23rd day of December 1893.
F. BOSSHARDI & CO.,
Agents to Applicants.
COMPLETE SPECIFICATION.
Improvements in School Slates.
We, JOHN HILTON of 19, Queen's Road, Clothier, GEORGE COLLINS HILTON,
of 30, Barker Street, Clothier, and EPHRAIM JACKSON, of 102, Library. Lane,
Mechanic, all of Oldham, in the County of Lancaster, do bereby 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 relates more particularly to an improved construction of school
slate frame and has for its object to render the same in its joints much stronger
without the use of metal plates or staples, so as not to be liable to give way and
fall to pieces as heretofore has been the case.
And in order that our invention may be more fully understood we have caused to
be appended hereunto one sheet of drawings marked with letters of reference
indicating like parts in the various figures.
Figs. 1 & 2 are perspective views of a slate joint detached,
Fig. 3 is a plan and Figs. 4 & 5 are respectively a side and an end view of a
frame complete constructed in accordance with our invention,
Fig. 6 is a perspective view of a modification thereof.
In carrying out our invention and referring to Figs. 1, 2, 3, 4 & 5, we form the
frame ends a & to be joined respectively on each side crosswise with a groove or
recess c, e¹, and two tongues d, d', adapted to interlock with the grooves or
recesses c, e, a pin e being passed through the tongues d, ¹ and grooved or recessed
part c, of the respective frame ends a & b, see Figs. 3.
In lieu of forming the tongues d, ', on one side or the frame end b they may be
formed in the middle, as shown in Fig. 6, and the grooves or recesses in the frame
end a to correspond in position, the former method however being preferable as it
will entail less work.

page_text: It will thus be seen that by interlocking the frame ends as described double
support and resistance is offered in any direction.
Having now particularly described and ascertained the nature of this inven
tion and in what manner the same is to be performed we declare that what we
claim, is,
In school slates, a frame joint formed by grooving or recessing on both sides one
end and forming the other with tongues corresponding in shape, the said grooves or
recesses being adapted to receive the said tongues and interlock with each other,
substantially as and for the purpose set forth.
Dated this 3rd day of August 1894.
F. BOSSHARDT & Co.,
4, Corporation Street, Manchester, Agents to Applicants.