Plates for Oil and other Presses.
Year: 1893

page_text: Date of Application, 5th Apr., 1893
Complete Specification Left, 4th Jan., 1894-Accepted, 10th Feb., 1894
PROVISIONAL SPECIFICATION.
Plates for Oil and other Presses.
I, WILLIAM CAREY LEECHMAN, of Colombo in the Island of Ceylon,
Merchant, at present residing at 92 Sinclair Road, in the County of Middlesex, do
hereby declare the nature of this invention to be as follows:-
In the Specification of a former Patent granted to me No. 9526 of the year 1890
I described a compound plate especially suitable for high pressures. In this plate
there were one above the other a comparatively thick plate with comparatively
large holes through it and a thin plate with fine holes through it.
According to my present invention which is applicable to plates of any form
I somewhat simplify the construction by making these two plates in one piece with
each other and yet obtain the same result, namely a fine hole immediately widening
out into a much larger one.
For this purpose I drill comparatively large holes nearly through the plate
leaving only thin diaphragms at the bottom of the holes and in these diaphragms I
form fine holes. This may be done by drilling or any other method but preferably
I punch the hole almost but not quite through and then file off the top of the
projection so formed on the undrilled side of the plate.
Or a similar result may be attained by building up the plate of bars with
bevelled edges so that when the bars are put together there are narrow holes or
slits on one side of the plate so formed and wide holes or slits on the other.
Deted this 5th dox of A nuil 1902
WM. CAREY LEECHMAN.
CUMI DIE DI MULTIVATION
Plates for Oil and other Presses.
1, WILLIAM CAREY LEECHMAN, of Colombo in the Island of Ceylon,
Merchant, at present residing at 92 Sinclair Road, in the County of Middlesex, 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:-
In the Specification of a former Patent granted to me No. 9526 of the year 1890
I described a compound plate especially suitable for high pressures. In this plate.
there were one above the other a comparatively thick plate with comparatively
large holes through it and a thin plate with fine holes through it.
According to my present invention which is applicable to plates of any form
I somewhat simplify the construction by making these two plates in one piece with
each other and yet obtain the same result, namely a fine hole immediately widening
out into a much larger one.
For this purpose I drill comparatively large holes nearly through the plate
leaving only thin diaphragms at the bottom of the holes and in these diaphragms
I form fine holes. This may be done by drilling or any other method but preferably
I punch the hole almost but not quite through and then file off the top of the
projection so formed on the undrilled side of the plate.
Or a similar result may be attained by building up the plate of bars with
bevelled edges so that when the bars are put together there are narrow holes or
slits on one side of the plate so formed and wide holes or slits on the other.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
:-
Plates for oil and other presses substantially as described.