IMPROVEMENTS IN APPARATUS FOR ELEVATING STRAW AND OTHER PRODUCE, ALSO APPLICABLE TO OTHER PURPOSES WHERE GEARING IS REQUIRED."
Year: 1866

page_text: LETTERS PATENT to John Coulson, of Stamford, in the County of
Lincoln, Engineer, for the Invention of "IMPROVEMENTS IN APPARATUS
FOR ELEVATING STRAW AND OTHER PRODUCE, ALSO APPLICABLE TO OTHER
PURPOSES WHERE GEARING IS REQUIRED."
PROVISIONAL SPECIFICATION left by the said John Coulson at the
Office of the Commissioners of Patents, with his Petition, on the 23rd
November 1866.
I, JOHN COULSON, of Stamford, in the County of Lincoln, Engineer, do
hereby declare the nature of the said Invention for "IMPROVEMENTS IN
APPARATUS FOR ELEVATING STRAW AND OTHER PRODUCE, ALSO APPLICABLE TO OTHER
PURPOSES WHERE GEARING IS REQUIRED," to be as follows:-
My Invention mainly consists in the construction and employment of a new
form of toothed wheel or gearing as about to be described. The periphery of
my toothed wheel is semicircular or nearly so in section, the base line of the.
semicircle being parallel to the axis of the wheel, and every tooth extending
round the whole arc of the semicircle, so that the wheel will act and gear into

page_text: another toothed wheel, either as a right-hand or left-hand mitre wheel or
bevil wheel, or as a spur wheel, according to the position in which it is
situated relatively to the wheel into which it gears.
my
In applying my wheels to apparatus for elevating straw and other produce,
for which apparatus they are especially intended, I mount one of them upon the
shaft round which the endless chain or band which carries the elevating tools
or appliances passes at the lower part of the apparatus, and I fit a second of
wheels upon a shaft carried by an independent frame which can be moved,
so that the two wheels will work into each other at any required angle, either
as a right or left hand mitre wheel or bevil wheel, or spur wheel, according
to the position into which the elevating apparatus is moved. The motion
from the prime mover is imparted to the shaft last named and is transmitted
by my wheels to the shaft of the endless chain or bands.
By means of my Invention I am enabled to dispense with the various
toothed wheels hitherto employed in straw or produce elevators to allow of the
elevators being worked in various positions and inclinations.
My toothed wheels or gearing are also applicable to all apparatus where
the parts which respectively carry two wheels in gear with each other are
moved into various angles with each other.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John Coulson in the Great Seal Patent Office on the
23rd May 1867.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
COULSON, of Stamford, in the County of Lincoln, Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-third day of November, in the year of our
Lord One thousand eight hundred and sixty-six, in the thirtieth year of
Her reign, did, fór Herself, Her heirs and successors, give and grant unto
me, the said John Coulson, Her special licence that I, the said. John
Coulson, my executors, administrators, and assigns, or such others ns I; the
said John Coulson, my executors, administrators, and assigns, should at
any time agree with, and no others, 'from time to time and at all times there-
after 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 "IMPROVE-

page_text: •
MENTS IN APPARATUS POR ELEVATING STRAW AND OTHER PRODUCE, ALSO APPLICABLE
TO OTHER PURPOSES WHERE GEARING IS REQUIRED," upon the condition (amongst
others) that I, the, said John Coulson, 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 John Coulson, 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
thereof; reference being had to the Drawings hereunto annexed, that is to
say:
My Invention mainly consists in the construction and employment of a new
form of toothed wheel or gearing, as about to be described. The periphery
of my toothed wheel is, semicircular or nearly so in section, the base line of
the semicircle being parallel to the axis of the wheel, and every tooth
extending round the whole are of the semicircle, so that the wheel will act and
gear into another toothed wheel at any angle, that is to say, either as a right-
hand or left-hand mitre wheel or bevil wheel, or as a spur wheel, according
to the position in which it is situated relatively to the wheel into which it
gears.
Figure 1 of the accompanying Drawings is a side elevation, and Figure 2
an edge view, partly in section, of a toothed wheel constructed according to my
Invention.
It will be observed that the periphery a of the wheel is an arc of a circle,
being a semicircle or nearly so, the base of the semicircle being parallel to the
axis b of the wheel.
In applying my wheels to apparatus for elevating straw and other produce,
for which apparatus they are specially intended, I mount one of them upon
the shaft round which the endless chain or band which carries the elevating
tools or appliances passes at the lower part of the apparatus, and I fit a second
of my wheels upon a shaft carried by an independent frame which can be
moved so that the two wheels will work into each other at any required angle
either as a right or left hand mitre wheel or spur wheel according to the
position into which the elevating apparatus is moved. The motion from the
prime mover is imparted, to the shaft last named, and is transmitted by my
wheels to the shaft of the endless chain or band.

page_text: Figure 3 is a plan view, and Figure 4 an elevation representing the mode
in which I apply my improved gear wheels to a straw or produce elevator.
A is the ordinary shaft, on which is mounted the drum a, round which the
endless chain or band which carries the elevating tools or appliances passes at
the lower part of the apparatus. The shaft A turns in bearings B, and on
this same shaft one of my wheels C is mounted; D is another of my wheels
mounted on a shaft E, supported in bearings F on an independent frame G;
this shaft has also mounted thereon a pulley H free to slide on the shaft, and
round which the strap from the machine or motive power is passed. The two
wheels C and D are in gear with each other; the frame G has depending
therefrom two bolts or pins J which respectively work in two slots K in a bed
plate L; the frame G is free to be moved according to the direction of the
slots K, and the two wheels C, D, always remain in gear either as a right or.
left hand mitre wheel, or as a bevil wheel, or as a spur wheel according to the
position of the frame G; the frame G may be fixed in any required position by
nuts M screwed on to the bolts J. The motion from the machine or motive
power which may be in any position relative to the drum shaft A is imparted
to the shaft E and transmitted by the gearing C, D, to the shaft A, and con-
sequently to the endless chain carrying the elevating tools. The pulley H is
made to slide on its shaft to adapt it to the position of the machine or motive
power; the whole may be mounted on any suitable carriage or framework
provided with wheels.
By means of my Invention I am enabled to dispense with the various
toothed wheels hitherto employed in straw or produce elevators to allow of the
elevators being worked in various positions and inclinations. My toothed
wheels or gearing are also applicable to all apparatus where the parts which
respectively carry two wheels in gear with each other are moved into various
angles with each other.
And having now described the nature of my said Invention, and in what
manner the same is to be performed, I declare that I claim,-
First, constructing apparatus for elevating straw and other produce with
toothed wheels having substantially the form herein-before described and
represented in the accompanying Drawings, whereby these wheels will remain
in gear no matter at what angle the elevator and the motive power occupy
relatively to each other.
Secondly, the combination in straw or produce elevators with the said
toothed wheels or gearing of other parts, arranged and acting substantially as
herein-before described and represented in the accompanying Drawings.

page_text: Thirdly, the construction and employment, where gearing is required, of
toothed wheels having substantially the form herein-before described and
represented in the accompanying Drawings.
In witness whereof, I, the said John Coulson, have hereunto set my
hand and seal, this Twenty-first day of May, One thousand eight
hundred and sixty-seven.
JOHN COULSON. (L.B.)