Improvements in or connected with Mowing and Reaping Machines.
Year: 1894

page_text: PROVISIONAL SPECIFICATION.
Improvements in or connected with Mowing and Reaping
Machines.
I, PHILIP PIERCE, of Mill Road Iron Works, Wexford, Ireland, Agricultural
Engineer, do hereby declare the nature of this invention to be as follows.-
The object of this invention is to provido means for effectually lubricating the
crank-pin and connecting rod head of mowing machines.
In carrying out my invention I form on the back of the crank plate a ring or
flange which will enclose and form a circular recess the inner diameter of which is
preferably larger than the outer diametor forming thus a conical recess
This recess is made of sufficient diameter to allow the end of the clank barrel
(in which the crank shaft revolves) to pass into and be wholly encircled by the
ring or flange formed on the back of the crank-plate.
The recess may be of smaller diameter so as to allow only the projection end of
the bushing to pass into it and be encircled by the ring.
In the back end of the crank pin I make a recess which I connect by a passage
with the recess in the crank plate and I bore a hole longitudinally through the
crank pin leading to the part of the crank pin which works within the connecting
1od head, a removable stoppor being provided over the hole for the purpose of
cleaning the passage leading to the recess in the crank plate or tho hole through
the crack pin to the connecting rod.
1 attach a lubricator of any well known form to either of the crank shaft
bearings the surplus oil from which after passing through the lower beaning flows
mto the recess at the back of the crank plate and thence through the hole in the
crank pin thereby lubricating the connecting rod head working on the clank pin.
I may so arrange the device as to cut off the communication between the end of
the crank barrel and the recess in the back of the crank-plate by making the recess
an annular space and feed oil into this annular space by an independent passage
leading from the oil feeder which may bo placed at any convenient position on the
outside of the barrel.
In order that the flow of oil may tend to keep the recess formed on the back of
the crank plate, free from dirt, I sometimes form the recess eccentrically with the
crank shaft and form the passage to the crank pin at the point of greatest
eccentricity. It will be obvious that matter will be carried towards this outermost
point and be projected into the crank pin.

page_text: Improvements in or connected with Mowing and Reaping
Machines.
I, PHILIP PIERCE, of Mill Road Iron Works, Wexford, Lieland, Agricultural
Engineer, do hereby declare the nature of this invention and in what manner the
same is to be performed, to be particularly described and ascertamed in and by the
following statement :--
The object of this invention is to provide means for effectually lubricating
the crank-pin and connecting rod head of mowing machines.
In carrying out my invention I form on the back of the crank plate a ring or
flange which will enclose and form a circular recess the inner diameter of which is
preferably larger than the outer diameter forming thus a conical recess.
In the back end of the crank pin 1 make a recess which I connect by a passage
with the recess in the crank plate and I bore a hole longitudinally through the
crank pin leading to the part of the crank pin which works within the connecting
1od head, a renovable stopper being provided over the hole for the purpose of
cleaning the passage leading to the recess in the crank plate or the hole through
the crank pin to the connecting rod.
I attach a lubricator of any well known form to either of the crank shaft
bearings the surplus oil from which after passing through the lower bearing flows
into the recess at the back of the crank plate and thence through the hole in the
crank pin, thereby lubricating the connecting rod head working on the crank pin.
To enable my invention to be fully understood I will describe the same by
reference to the accompanying drawing, in which
Figure 1 is an elevation of so much of the crank disc aud the adjacent parts as
is necessary to illustrate my invention:
Figure 2 is a longitudinal section of the same ⚫
Figure 3 is a section on the line 3-3 Figure 2, and,
Figure 4 is a section on the line 4-4 Figure 2.
a is the usual sleeve or bracket within which the crank spindle biotates, c being
the bushing at one end of the said sleeve for supporting the said spindle, & the
crank disc e the crank pin and f the pitman or connecting rod.
g is the ring or flange which I form upon the back of the crank disc and which
18 bored out or recessed as shewn at h, the deepest part of the recess being at the
root of the flange. is a lubricator of ordinary construction the lubricant from
which after passing through the bushing c and lubricating the spindle flows into
the recess h and in order that the lubricant shall be prevented from escaping before
it enters the recess the bushing c 18 extended into the recess as shewn.
is the recess in the back of the crank pine the said recess being connected with
the recess by a passage k and having connected to it another passage
conducting the lubricant from the bushing c to the connecting rod f.
for
m is a plug or cap fixed to a spring n and normally closing the opening into the
recess; when the said plug is removed it will be obvious that the passages k and/
can be readily cleaned.
With the arrangement herein before described it will be understood that when
the crank disc d 18 rotating the centrifugal action will cause the oil, which enters
the recess h, to pass along the passages Å and I and thereby maintain the crank pin
in a constant state of lubrication. The flow of oil may be further facilitated by
making the recess slightly eccentric to the crank spindle and by forming the
passage at the point of greatest eccentricity, this fatter arrangement has tho

page_text: advantage that it will prevent the glutinous portion of the lubricant from accumu-
lating in the bottom of the recess h the tendency always being for it to flow out
before it bas time to accumulate.
Instead of making the flange g so as to abut against the end of the bracket a
the said flauge may be made large enough to encircle the end of the said bracket
in which case also the bushing c is made flush with the end of the bracket a.
Instead of adapting the crank to be lubricated by oil which has passed through
the bushing c I may lubricate the sand crank by means of fresh oil, in which case a
passage is formed in the bracket a or in the bushing to conduct the lubricant duect
from the lubricator into the recess h.
As shewn in the drawing the lubricator is represented as being arranged in
connection with that end of the crank shaft which cairies the crank disc but as in
practice the said crank shaft is always arranged in an inclined position it will be
obvious that the lubricator can be arranged in connection with the other end of the
said shaft the lubricant after lubricating the upper journal flowing inside the
bracket a to the lower journal.
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
claun 18:
1. In a mowing or reaping machine the combination with the crank disc of a
recess formed at the back of the said disc and communicating by suitable passages
with the surface of the crank pin whereby oil introduced into the said recess will
flow to the crank pin to lubricate the same, substantially as described.
2. In a mowing or reaping machine the arrangement for lubricating the crank
pin of the connecting rod, substantially as herein before described and illustrated in
the accompanying drawing.
Dated the 23rd day of September 1895.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.