IMPROVEMENTS IN LUBRICATORS
Year: 1869

page_text: LETTERS PATENT to John Tenwick, of Spittlegate Iron Works,
Grantham, in the County of Lincoln, Moulder, for the Invention
of "IMPROVEMENTS IN LUBRICATORS."
Sealed the 25th January 1870, and dated the 11th August 1869.
PROVISIONAL SPECIFICATION left by the said John Tenwick at the
Office of the Commissioners of Patents, with his Petition, on the
11th August 1869.
I, JOHN TENWICK, of Spittlegate Iron Works, Grantham, in the
County of Lincoln, Moulder, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN LUBRICATORS," to be as follows:-
My Invention consists of an arrangement for supplying the crank
pin with oil as herein described. It is applicable to every variety of
machine, but in the present description I will confine myself to it as
used to a reaping or mowing machine. I enclose the hollow. of the
crank plate or fly wheel of the reaping or mowing machine with a
suitable cover or front plate, and such hollow I use as a receptacle for
the oil. In the boss or socket of the plate through which the crank

page_text: pin passes I make one or more holes for the oil to pass from the
receptacle to the crank pin. In the crank pin where it fits in the boss
or socket I have a groove or slot, which communicates through an
aperture to the centre of the crank pin, which I make hollow in this
part with an opening therein where the socket of the connecting rod
works. The oil passes through the aperture in the boss or socket into
the centre of the crank pin, and thence to the socket of the connecting
rod. As the crank plate revolves the oil alternately flows through the
apertures and back again, thereby causing a continuous state of lubri-
cation. I have a plug to the hollow of the crank pin to regulate the
supply or to use when the machine is not in work. In the rim or edge
of the crank plate I introduce a screw plug to supply the oil without
taking the front plate off. Where there is no crank plate or wheel
I would make my receptacle in the body of the crank. All lubricating
substances can be applied for this Invention.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said John Tenwick in the Great Seal Patent Office
on the 4th February 1870..
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
TENWICK, of Grantham, in the County of Lincoln, Moulder, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Eleventh day of August, in the year
of our Lord One thousand eight hundred and sixty-nine, in the thirty-
third year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said John Tenwick, Her special licence
that I, the said John Tenwick, my executors, administrators, and
assigns, or such others as I, the said John Tenwick, 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 "IMPROVEMENTS IN
THE MANUFACTURE OF LUBRICATORS," upon the condition (amongst others)
that I, the said John Tenwick, my executors or administrators, by an

page_text: 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 Tenwick, 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, that is to say :-
This Invention has for its object improvements in the manufacture
of lubricators, and consists of an arrangement for supplying the crank
pins, shafting, and bearings of all descriptions of machinery with oil.
It is applicable to every variety of machine, but in the present description
I will describe it as used to a reaping or mowing machine. In the
crank plate or fly wheel of the reaping or mowing machine I cast a
hollow or cavity, and such hollow or cavity I use as a receptacle for
the oil. The crank plate or fly wheel may however be cast or manu-
factured in one or more parts. suitably fitted together to perform the
necessary functions; I prefer to have it cast in one piece to save the
expenses of the fitting. In the boss or socket of the crank plate through
which the crank pin passes I make one or more holes for the oil to
pass through from the receptacle to the crank pin. In the crank pin
where it fits in the boss or socket I make one hole, which communicates
with the hole in the boss or socket of the crank plate from which the
oil passes to the regulator or feed plug, and one other hole which
receives its supply from the regulator plug, and conveys the oil to the
place where the connecting rod works. In the centre of the crank piu
I make a hole to communicate with the hole in the boss or socket of
the crank plate, and into this hole I fit the regulator plug. The regulator
plug is made with a shoulder and groove or slot to communicate with
the holes in the crank pin to supply the oil where the connecting rod
works, and I secure the regulator plug to the crank pin with a washer
and pin or screw, or any other suitable means. In the rim or outside
edge of the crank plate I introduce a hole to supply the oil, and this
hole is made as near to the part where the oil is delivered on to the
crank pin as circumstances will admit, and in order to stop the last-

page_text: mentioned hole I use a screw plug or a piece of cork or other suitable
material. The oil passes through the aperture in the boss or socket
into the regulator or feed plug in the crank pin, and from thence to
the socket of the connecting rod. As the crank plate revolves the oil
alternately flows through the apertures and back again, thereby causing
a continuous state of lubrication. All lubricating substances analagous
to those in use can be applied with this Invention. In making my
lubricator in the form described and supplying the same with oil at
the point described the lubricating substance acts direct on the parts
requiring lubrication without the aid of any foreign substance whatever,
and waste of oil is prevented by atmospheric pressure.
My Invention can be more readily understood by referring to the
Drawings which accompany this Specification, but I wish it to be
understood that I do not bind myself to the exact shapes and dimensions
shewn therein, as these can be altered in their details as is found necessary
in practice.
Fig. 1 is a side section of the lubricator. a, a, are the cavities for
the oil.
Fig. 2 is a sectional elevation shewing the cavities a, a. B is the
crank pin; C, the regulator plug; d, the oil passage; e, the feed plug;
f, the crank shaft.
Fig. 3. is a sectional view of the crank pin shewing a, the cavity for
supplying oil to the crank pin; c, the regulator plug; d, d, the oil
passages; g, the pin; h, the groove in plug for conveying the oil; M, the
collar.
Fig. 4 is a side elevation (part in section). a is the cavity; b, the crank
pin. The regulator pin and oil passages are shewn in dotted lines; fis
the crank shaft; k, the nut for fastening the crank pin.
Fig. 5 is a side elevation of a double disc lubricator for lubricating
the crank shaft and crank pin. a, a, a, a, are the cavities; fis the
crank shaft. The regulator plug and oil passages are shewn in dotted
lines.
Fig 6 is a front elevation of double disc lubricator. The dotted lines
shew the shape of cavity at the back. 6 is the crank pin; c is the
regulator plug for cavity at the back; d is the oil passage from cavity;
fis the crank shaft.

page_text: Fig. 7 is a section of the crank shaft. a, a, a, a, are the cavities; c is
the regulator plug; d, d, are the oil passages; h is the groove in the
plug to allow the oil to pass between the cavity and the crank shaft.
Having now described and explained my said Invention, and the means
of carrying out the same, I claim, the combination and arrangement of
parts applied as herein-before described so as to cause the oil or lubri-
cating substance to act directly on the parts requiring lubrication without
the assistance of any foreign agent, and prevent the waste of oil by
atmospheric pressure.
In witness whereof, I, the said John Tenwick, have hereunto
set my hand and seal, this First day of February, in the year
of our Lord One thousand eight hundred and seventy.
JOHN TENWICK. (L.S.)