IMPROVEMENTS IN LUBRICATING APPARATUS FOR STEAM ENGINES
Year: 1874

page_text: LETTERS PATENT to William Robert Lake, of the Firm of Haseltine,
Lake, & Co., Patent Agents, Southampton Buildings, London, for
the Invention of "IMPROVEMENTS IN LUBRICATING APPARATUS FOR STEAM
ENGINES." A communication from abroad by Elisha Safferd Fassett
and George W. Hill, both of Ann Arbor, Michigan, United States
of America.
Sealed the 2nd October 1874, and dated the 22nd April 1874.
PROVISIONAL SPECIFICATION left by the said William Robert Lake
at the Office of the Commissioners of Patents, with his Petition, on
the 22nd April 1874.
I, WILLIAM ROBERT LAKE, of the Firm of Haseltine, Lake, & Co.,
5 Patent Agents, Southampton Buildings, London, do hereby declaro the
nature of the said Invention for "IMPROVEMENTS IN LUBRICATING APPARATUS
FOR STEAM ENGINES," a communication, to be as follows:-
This Invention relates to improvements in that class of lubricators
wherein the flow of the oil is designed to be regulated by the inlet of

page_text: '
steam into the steam chest or cylinder to which the lubricator is
attached.
.
The object of the said Invention is to prevent any waste of oil and
the outflow thereof when the engine is standing still.
The said improvements consist in the peculiar arrangement and con-
struction of a double valve upon the top of a rod and in the combination
therewith of a device for governing the operation of the said rod and
preventing the pressure of steam in the lubricator from forcing the oil
through the tube when the engine is motionless; also in the combination
and arrangement of the various parts as herein-after set forth.
In the practice of the said Invention a hollow standard is screwed into
the cover of a steam chest, on which is mounted a cup with a screw plug
at its top, the lower part of the said plug having a recess formed in it.
A tube rising from the top of the said hollow standard has its upper end
terminating within the recess of the plug, and is externally screw-
threaded. Within the tube is a spindle carrying at its lower end a
piston which plays casily in a chamber or cylinder formed by enlarging
the bore at the lower part of the said standard. Above the piston is a
spring spirally coiled about the spindle to exert a downward pressure
upon the piston to overcome the upward pressure of the steam in the
steam chest when a port is open to give steam to the cylinder, but not
strong enough to resist the pressure when both steam ports are covered
or closed by the valve, at which time the piston and spindle will be
raised by the increased pressure of the steam. At the top of the aforc-
said tube I form a seat for a spherical valve secured to the top of the
spindle. A cylinder or cap internally threaded is screwed over the top
of the said tube. In the top of this cap is a seat for the valve provided
with a central aperture. The top of the said cap is slotted to permit it
to be turned by a screwdriver, and thereby increase or diminish the space
between the seats.
By this Invention the utmost economy in the expenditure of oil or
tallow is attainable, as only just enough may be fed to the engine to
lubricate the valve seats and cylinder during the time the engine is at
work.
If preferred a double-faced valve may be employed in place of that
above described.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Robert Lake in the Great Seal Patent
Office on the 22nd October 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
ROBERT LAKE, of the Firm of Haseltine, Lake, & Co., Patent Agents,
Southampton Buildings, London, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-second day of April, in the year
of
our Lord One thousand eight hundred and seventy-four, in the thirty-
seventh year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said William Robert Lake, Her special
licence that I, the said William Robert Lake, my executors, adminis-
trators, and assigns, or such others as I, the said William Robert Lake,
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
LUBRICATING APPARATUS FOR STEAM ENGINES," a communication to me from
abroad by Elisha Safferd Fassett and George W. Hill, both of Ann Arbor
Michigan, United States of America, upon the condition (amongst others)
that I, the said William Robert Lake, 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 William Robert Lake, do hereby

page_text: steam into the steam chest or cylinder to which the lubricator is
attached.
The object of the said Invention is to prevent any waste of oil and
the outflow thereof when the engine is standing still.
The said improvements consist in the peculiar arrangement and con-
struction of a double valve upon the top of a rod and in the combination.
*therewith of a device for governing the operation of the said rod and
preventing the pressure of steam in the lubricator from forcing the oil
through the oil tube when the engine is motionless; also in the combi-
nation and arrangement of the various parts as herein-after set forth.

page_text: Second. The construction and arrangement of the hollow standard A,
cup B, plug C, tube D, spindle b, piston c, spring d, valve e, seat ƒ,
cap D¹, and seat f¹, as herein described and for the purpose set forth.
In witness whereof, I, the said William Robert Lake, have here-
unto set my hand and seal, this Twenty-second day of October,
in the year of our Lord One thousand eight hundred and seventy-
four.
Witness,
JAS. EDWARDS,
8, Southampton Buildings,
London.
WN. ROBT. LAKE. (L.8.)