IMPROVED MACHINERY OR APPARATUS FOR MAKING THE MOULDS FOR SPUR AND OTHER TOOTHED WHEELS
Year: 1873

page_text: LETTERS PATENT to Elijah Dickinson, of Wigan, in the County of
Lancaster, Mechanical Engineer, for the Invention of "IMPROVED
MACHINERY OR APPARATUS FOR MAKING THE MOULDS FOR SPUR AND OTHER
TOOTHED WHEELS."
Sealed the 22nd May 1874, and dated the 28th November 1873.
PROVISIONAL SPECIFICATION left by the said Elijah Dickinson at
the Office of the Commissioners of Patents, with his Petition, on
the 28th November 1873.
I, ELIJAH DICKINSON, of Wigan, in the County of Lancaster,
Mechanical Engineer, do hereby declare the nature of the said Inven-
tion for "IMPROVED MACHINERY OR APPARATUS FOR MAKING THE MOULDS FOR
SPUR OR OTHER TOOTHED WHEELS," to be as follows:-―
This Invention consists in constructing machinery substantially as
follows, that is to say, an annular ring is formed with holes at various

page_text: intervals for different diameters and pitches of wheels, such annular
ring being provided with stiffening bars. The centre of this annular
ring is provided with a pin round which the segment of the spur or
cog wheel to be moulded is worked. A wrought-iron hook for raising
this segment is fixed to it, and there are upright slide bars on which 5
the segment is drawn up from the mould; also bars acting as guides.
for steadying the segment and preventing the mould from being dis-
turbed.
A sliding arm is provided to be moved to suitable radii for differential
diameters, and also a lip on the segment to fall on the sliding arm, 1
thereby fixing the regulated depth of the wheel.
The use and operation of this machinery is this, namely, the centre
pin is fixed firmly in the sand, and the sliding arm working in con- -
junction with the segment is held in position by a trigger or clutch,
and when the mould is perfected the segment is raised, and then 1
(actuating the trigger movement) is made to enter the next hole in
the ring, and so on from hole to hole till the circumference of the
circle or wheel is complete. The sand is to be cleared out for the
reception of the machinery, leaving a slight clearance from the periphery
of the wheel, the depth of the bed being governed by the proposed depth
of teeth.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Elijah Dickinson in the Great Seal Patent Office 2
on the 28th May 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ELIJAH
DICKINSON, of Wigan, in the County of Lancaster, Mechanical Engineer,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her 3
Letters Patent, bearing date the Twenty-eighth day of November, in the
year of our Lord. One thousand eight hundred and seventy-three, in

page_text: the thirty-seventh year of Her reign, did, for Herself, Her heirs and
successors, give and grant unto me, the said Elijah Dickinson, Her
special licence, that I, the said Elijah Dickinson, my executors, admini-
strators, and assigns, or such others as I, the said Elijah Dickinson,
my executors, administrators, and assigns, should at any time agree
with, and no others from time to time, and at all times thereafter
during the term therein expressed, should and lawfully might make,
use, exercise, and vend, within the United Kingdom of Great Britain
and Ireland, the Channel Islands, and Isle of Man, an Invention
for "IMPROVED MACHINERY OR APPARATUS FOR MAKING THE MOULDS FOR
SPUR AND OTHER TOOTHED WHEELS," upon the condition (amongst others)
that I, the said Elijahı Dickinson, my executors or administrators, by
an instrument in writing under my, or their, or one of their hands and
seals, should particularly describe and ascertain the nature of the said
Invention, and in what manner the same was to be performed, and
cause the same to be filed in the Great Seal Patent Office within six
calendar months next and immediately after the date of the said Letters
Patent.
NOW KNOW YE, that I, the said Elijah Dickinson, do hereby declare
the nature of my said 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 consists in constructing machinery substantially as
follows, that is to say, an annular ring is formed with holes at various
intervals for different diameters and pitches of wheels, such annular
ring being provided with stiffining bars. The centre of this annular
ring is provided with a pin round which the segment of the spur
or cog wheel to be moulded is worked. A wrought-iron hook for
raising this segment is fixed to it, and there are upright slide bars
on which the segment is drawn up from the mould, such bars acting
as guides for steadying the segment and preventing the mould from
being disturbed.
A sliding arm is provided to be moved to suitable radii for differential
diameters, and also a lip on the segment to fall on the sliding arm,
thereby fixing the regulated depth of the wheel.
3
Having thus far described the nature of my said Invention, I will
now, in compliance with the aforesaid condition, in the said Letters

page_text: Patent contained, proceed to particularly describe and ascertain the
nature of my said Invention, and in what manner the same may be
performed or carried out in practice, which I shall do by the aid of
the accompanying Drawings (craving the aid if necessary of the fore-
going description), that is to say :-

page_text: Machinery or Apparatus for Making the Moulds for Spur and other
Toothed Wheels," as herein-before set forth and described.
In witness whereof, I, the said Elijah Dickinson, have hereunto
set my hand and seal, this Twenty-sixth day of May, in the year
of our Lord, One thousand eight hundred and seventy-four.
Witness,
ROBERT GREEN,
No. 6, Standishgate Place,
Wigan.
ELIJAH DICKINSON. (L.S.)
Engineer,
Pottery,
Wigan.