Improvements in Shut-off Mechanism for Steam Engines, and other slow Motorsex moim
Year: 1897

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PROVISIONAL SPECIFICATION
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[Communicated from abroad by THOMAS
THOMAS DANNIEL MILLEA, Manufacturer,
No. 275, Main Street,, of the City of Springfield, in the County of Hampden,
and. State of Massachusetts, United States of America],
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"Improvements in Shut-off Mechanism for Steam Engines, and other
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I, WILLIAM PHILLIPS THOMPSON, F.C.S.MIM.Ed of the, Agency for Foreign
Patent, Solicitors, 322 High Holborn in the County of Middlesex,16, Lord Street
Liverpool, and 6, Bank Street,Manchester, both in the County of Lancaster; and
Lower. Temple Street, Birmingham, in the County of Warwick, Civil Engineer,
do hereby declare: the nature of this invention to be as follows::
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This invention relates to devices or mechanism for the shutting off the supply
of motive force to a steam engine or other motor so that the same may be operated
readily and easily, and further by an arrangement of mechanism by the employ-
ment of which the device may be put in operation from a point o
points remote
from the operative mechanism, and further by which the device may be operated
by an electrical apparatus so that when the circuit is completed the device will
be set in operation (provided it be constructed to operate upon a closed
closed circuit)
or to be put in operation by the breaking of a circuit (provided it be constructed
to operate when the circuit is, broken).
The
invention further relates to an
arrangement of mechanism by which the shut-off valves may be operated by a
supplementary cylinder provided, with a piston rod and piston head, the pistun
rod being operatively connected either directly or by intermediate mechanism
with the shut-off valve or valves. Thetinvention: further relates i to mechanism
so arranged as to operate upon the governor of a steam engine or other motor
and when put in operation will cause to be moved the same mechanism which
normally is caused to be moved or operated by the governor balls so that the
governor mechanism operates as the intermediate mechanism to cause the shut
off of the supply of motive force.
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Although the invention may be arranged and adapted without material altera-
tion to operate in conjunction with motors and governors of various styles and
kinds, it is deemed unnecessary herein to particularly describe these various
constructions, it being deemed sufficient to describe the arrangement and opera-
tion of the device in connection, with an ordinary ball governor arranged in
operative connection with a steam engine of the type known as the "Corliss."
The preferred construction and arrangement of the device when applied to a
ball governor as stated is as follows: 17.1 Pet
1 I provide a' cylinder having a piston and piston rod
piston rod and quince anc
to the governor in such manner and so arranged that when the piston is moved
the piston rod is put in 'engagement with one of th
of the movable
mechanism (preferably by one of the parts whose position is normally controlled
ts who able parts of the
by the position of the governor, balls) and said, cylinder ist .connected by suitable
locate the same adjacent
1911011191 150.
705

page_text: conduits with the boiler and said conduit is provided at some convenient locality
with a valve so that by the operation of said valve in said conduit, steam may
be admitted to said cylinder. Adjacent to and operatively connected with said
valve in said conduit I prefer to arrange an electro magnet and an armature,
the latter of which is operatively connected with a weighted or spring provided
lever, the armature operating to hold said weighted lever in an elevated position
-or to hold said spring under tension and so arranged that when the electro magnet
is energized the armature will be attracted and thereby disengage the retaining
mechanism leaving the weight or spring provided lever free to operate and this
lever being operatively connected with said valve in said conduit causes the same
to be opened thus allowing steam to enter said shut-off cylinder thus moving the
piston and piston rod which operates as before stated to move said movable part
of the governor so that the supply of steam to the engine cylinder is shut off.
Arranged at various points in a building or in different buildings are suitable
push buttons or switches all electrically connected with a source of electrical
energy and said electro magnet in the same circuit so that when said switches or
push buttons are operated, the circuit is completed and the electro magnets
energized as before stated drawing the armature towards the electro magnets
disconnecting the mechanism extending between the armature and the weight or
spring provided lever thus setting free the lever and allowing it to be operated
by the weight or spring, thus opening the valve in the conduit, allowing steam
to enter the shut-off cylinder and operate the piston and piston rod as before stated.
It will readily be seen that instead of arranging the cylinder so as to operate
upon the governor mechanism, it may easily be arranged so that the piston rod
will operate a valve without the interposition of the governing mechanism and
thus the advantages of the invention will be attained.
It will also be readily seen that a weight or spring may be arranged to operate
a valve and that said weight or spring may be set free by an arrangement of
electro magnets and armature as before stated without the employment of the
steam shut-off cylinder. I prefer however, the arrangement before more particu-
larly described.
It will be seen that if the device is arranged to be put in operation by a broken
circuit then the arrangement of the armature and parts connected therewith
would be such that while the armature is drawn towards the electro magnets, the
mechanism is restrained from operation and that when the circuit is broken and
the armature free to move away from the electro magnet, then the restraining
mechanism would be detached and the device allowed to operate as before described.
Dated this 18th day of January 1807
W. P. THOMPSON & Co
Patent Agents for the Applicant.
322 High Holborn London W.C.
COMPLETE SPECIFICATION.
"Improvements in Shut-off Mechanism for Steam Engines and other
Motors."
I, WILLIAM PITILLIPS THOMPSON, F.C.S., M.I.M.E., of the Agency for Foreign
Patent Solicitors, 322, High Holborn in the County of Middlesex, 6, Lord Street,
Liverpool, and 6, Bank Street, Manchester, both in the County of Lancaster, and
Lower Temple Street, Birmingham in the County of Warwick, Civil Engineer,
do hereby declare the nature of this inventin to be as follows:-
My invention relates to improvements in mechanism or means arranged and .

page_text: adapted to stop the movement of an engine by shutting off the supply of steam
to the steam-cylinder; the stop mechanism being so arranged as to be set into
action from a point remote from the engine; and the object is to provide a
mechanism of the kind named and for the purpose intended which is positively
effective in its operation, and which is readily applicable to engines of different
constructions.
I have fully and clearly illustrated my invention in the accompanying drawings,
wherein―
"
I have illustrated my invention as applied to a governor of the common and
well known type of engine, known as the Corliss", it will readily be perceived
however that without material change the invention may be applied to governors
and engines of other types. It is deemed unnecessary herein to describe the well
known operation and construction of the governor illustrated, the description will
therefore, be limited to the general application of my device thereto.
The steam-cylinder h, is shown as mounted upon the governor-post a, and is
so arranged that if the piston-rod j, is driven upward, it will operate against a
cross-rod f, and thereby lift the cross-rod and through proper common and well
known connections and mechanism operate to shut off the steam from the engine
cylinder in the same manner as if the governor were rotated rapidly and the
governor-balls thereby moved outward and upward, the downward projecting
rods x, being connected with the cross-rod f, and through these and other well
known connections the grab-hooks are prevented from engaging the necessary parts
on the steam valves, and thus stop the entrance of steam into the engine cylinder.
The means devised by me for causing the piston-head in the shut-off cylinder h,
to be moved upward and the steam to the engine cylinder to be cut off, is an
arrangement whereby steam may be allowed to enter the cut-off cylinder h by
a pipe connection with the boiler And for that purpose I connect the cylinder h
with the boiler, or other steam-pipe, by pipes k and 7, and in these pipes I mount
a valve p, of any convenient form of construction, which may be operated by
the employment of a weight or spring or other means, so that when this valve p
is open, the steam rushes into the cylinder h, through the pipes and causes the
piston-rod to be moved upward and lift the cross-rod f, which, rod as stated,
has connection with the valves in the engine cylinder.
I have illustrated one simple means of causing this valve 2 to be opened,
which consists in providing the hand-wheel or stem of the valve with a rod or
lever s, upon which is mounted a weight t, as shown in the drawings, which is
provided with a recess or projection, or other means for engagement, whereby
a latch, lever, or stop, or other catch device, may engage the same, and retain
it in position until released when by reason of a weight, spring or other contri-
vance, the lever or rod s moves and causes the valve p to be opened, and thus
permit the entrance of steam to the cut-off cylinder. I have illustrated as one
means of maintaining the lever s in the desired normal position and for releas-
ing the same, an arrangement of electro-magnets w, mounted in a suitable sup-
porting frame v, and pivotally mounted in the frame, or adjacent thereto, is
a bell-crank lever u, one arm of which is provided with a means for maintaining
the lever s in its normal position, and the other arm of which is provided with
an armature disposed adjacent to the cores of the magnet; and it will readily
be seen, that when the electro-magnets are energized by being placed in circuit
with a source of electrical energy, such as the battery z for example they will
operate to draw the armature towards and against the cores and thus throw the
opposite arm of the bell-crank lever out of engagement and allow the inlet valve
to operate as before stated.
The source of electrical energy may be arranged at any convenient place, and
the conducting wires carried to various parts of the building, and push-buttons,
switches or other make and break appliances interposed in the circuit, as indicated
У in the drawing so that whenever it may be desired to immediately stop the.
engine, as happens in case of accident, it simply becomes necessary to operate
at