Cooling or Refrigerating Lubricating Oils and Apparatus therefor.
Year: 1888

page_text: Date of Application 26th July, 1888
Complete Specification Left, 26th Apr., 1889-Accepted, 15th June, 1889
PROVISIONAL SPECIFICATION.
Cooling or Refrigerating Lubricating Oils and Apparatus therefor.
I, DAVID CRAWSHAW of 1 Stamford Place, Sale in the County of Chester,
Engineer do hereby declare the nature of this invention to be as follows:-
Where heavily loaded bearings or journals have to be lubricated, such as the
crank-shaft bearings of mill engines or marine engines, a copious flow of lubricating
oil through the bearings is usually applied, the oil escaping from the bearings being
collected in cups and conveyed to a cistern, whence it is raised into another cistern
placed at a higher level than the bearings, in which it is passed through strainers and
returned to the bearings or the oil cups or lubricators provided for them. With this
arrangement the oil which has become heated in the bearings, remains at such a high.
temperature, when returned to the bearings that its viscosity and lubricating
power is greatly reduced, especially in the case of the mineral oils now generally
used, and the heating of the bearings and journals frequently results. My invention
has for its object to remedy this defect, which I attain by cooling or refrigerating the
oil before returning it to the bearings or using it over again.
For this purpose I pass the oil which is pumped into a cistern and strained as
usual on its return way to the bearings through pipes immersed in a cistern filled with
cold water. These pipes may be coiled or bent backwards and forwards, but by
preference I use pipes arranged in parallel rows fitted at the ends into boxes or
chambers arranged so that each pipe is at one end in communication with the one
above, and at the other end with the one below it, so that the oil percolates them in
a zig-zag flow. By this arrangement a large cooling surface is obtained in a small
space. The cistern is filled with water, which during warm weather or where the
cistern is placed in a warm position may be continually renewed by allowing a supply
of water from a suitable tank or the mains to flow into the cistern and the warmed
water to flow off through an overflow pipe. By these means the temperature of the
oil can be reduced to any desired degree, and its viscosity and lubricating properties
restored, so that it can be continuously used over again and the heating of the
bearings is entirely obviated.
Dated this 25th day of July 1888.
EMMOTT & Co.,
Agents for the Applicant..
COMPLETE SPECIFICATION.
Cooling or Refrigerating Lubricating Oils and Apparatus therefor.
I, DAVID CRAWSHAW, of 1, Stanford Place, Sale, in the County of Chester,
Engineer, 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 :-
Where heavily loaded bearings or journals have to be lubricated, such as the
crankshaft bearings of mill engines or marine engines a copious flow of lubricating
oil through the bearings is usually applied, and the oil escaping from the bearings
collected in cups or trays and conveyed to a cistern, whence it is raised by a pump or
its equivalent into another cistern placed at a higher level than the bearings, in which
it is passed through strainers and returned to the bearings or the oil cups or
lubricators provided for them. With this arrangement the oil which has become
heated in the bearings, remains at such a high temperature when returned to the
bearings that its viscosity and lubricating power is greatly reduced, especially in the
case of the mineral oils now generally used, and the heating of the bearings and
Ս. Ը-

page_text: journals frequently results. My invention has for its object to remedy this defect,
which I attain by cooling or refrigerating the oil before returning it to the bearings
or using it over again.
For this purpose I pass the oil which is pumped into a cistern and strained as
usual on its return way to the bearings through pipes immersed in a cistern filled
with cold water. These pipes may be coiled or bent backwards and forwards; but by
preference I use pipes arranged in parallel rows fitted at the ends into boxes or
chambers arranged so that each pipe is at one end in communication with the one
above and at the other end with the one below it, so that the oil percolates them in a
zig-zag flow. By this arrangement a large cooling surface is obtained in a small
space. The cistern is filled with water, which during warm weather or where the
cistern is placed in a warm position may be continually renewed by allowing a supply
of water from a suitable tank or the mains to flow into the cistern and the warmed
water to flow off through an overflow pipe. By these means the temperature of the
oil can be reduced to any desired degree, and its viscosity and lubricating properties
restored, so that it can be continuously used over again and the heating of the
bearings is entirely obviated.
On the sheet of drawings appended hereunto this arrangement of pipes and trough
is shewn, fig. 1 showing a section of the cistern along line A B on fig. 2 and fig. 2 a
plan. Into the cistern a square hollow boxes 61 b and c¹² cc are placed
connected by pipes d¹ d² d³ ranged in parallel rows. The pipes d' connect the
lower part of the box 6' with the upper part of box c'; the pipes d the lower part
of box with the upper part of box d¹, and so on. The oil flowing into the box b¹
from an overhead cistern to which it had been raised from the cistern collecting the
oil from the bearings, thus passes from 61 through pipes d¹ to c¹, thence through
pipes to and so on, till it has passed through all the pipes and boxes in the
direction of the arrows and is finally conducted through a piped to the bearings or
oil cups or lubricators for the same. Cold water is supplied to the cistern a through
an inlet pipe e and discharged through an overflow pipe f.
I do not confine myself to this arrangement of pipes and boxes, but coils or
serpentine pipes may be used instead thereof.
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,
Firstly, the cooling or refrigerating of lubricating oils circulated continuously
through bearings and straining cisterns, by passing them through pipes or their
equivalent immersed in cold water during their return flow to the bearings.
Secondly, the arrangement of cooling apparatus for continuously circulated
lubricating oils herein described and illustrated by the drawings.
Dated this 23rd day of April 1889
Dated this 23rd day of April 1889
EMMOTT & Co.,
Agents for the Applicant.