Improved Knocking-off Motion or Stop-gear for Steam Engines.
Year: 1897

page_text: Date of Application, 12th Oct., 1897
Complete Specification Left, 12th July, 1898-Accepted, 8th Oct., 1898
Improved Knocking-off Motion or Stop-gear for Steam Engines.
We, JOSEPH CLEGG, of S, Berkeley Street, Brierfield, in the County of Lancaster,
Engine Touter, and TOM CLEGG, of 80, Briercliffe Road, Burnley, in the said
County, Warp Dresser, do hereby declare the nature of this invention to be as
follows:-
This invention relates to an improved knocking-off motion for steam engines,
which is designed to automatically shut the equilibrium valve or stop valve, in
case the engine is running at a higher speed than safety will allow.
In proceeding to carry out our invention, we attach to the valve rod of the
engine a vertical upright, which receives the reciprocating movement of the valve
rod. On this vertical upright, we mount a swinging pendulum, the oscillations of
the pendulum increasing or decreasing just according to the speed of the engine.
Mounted ou a support on the slide rest of the engine is a 1 lever, to one
horizontal extremity of which is connected a wire or cord, which passes over pulleys
to the equilibrium valve or stop valve of the engine. Attached to the vertical
extremity of the 1 lever is a spring, which has a tendency to pull the vertical
extremity, and thereby depress that end of the lever, to which the cord or wire is
connected. To prevent this action taking place until the required time, we mount
on a stud a swivelling or spring catch piece, which engages with the opposite
horizontal extremity of the lever, to that to which the cord or wire is
attached.
So long as the engine is running at an ordinary rate, the oscillations of the
pendulum will not be sufficiently great to strike the retaining catch piece and
relieve the lever; but should tho speed be excessive, the pendulum strikes and
disengages the catch-piece, thereby liberating the 1 lever, and by the action of
the aforesaid spring thus drawing forward the wire or cord connection to shut off
the steam. On the retaining catch-piece may be an adjusting screw, which is
designed to regulate the distance between the pendulum and the catch-piece, and
thus allowing the engine to run at a given speed, the blow or knock of the
pendulum being received by the said retaining catch or screw.
Dated this 11th day of October 1897.
improved anocking-on Motion or Stop-gear for Steam Engines.
We, JOSEPH CLEGG, of 8, Berkeley Street, Brierfield, in the County of Lancaster,
Engine Tenter, and TOM CLEGG, of 80, Briercliffe' Road, Burnley, in the said County,
[Price 8d.]

page_text: Warp Drosser, do hereby declare the nature of this invention and in what mammer
the samo is to be performed, to be particularly described and ascertained in and by
the following statement:-
This invention relates to an improved knocking-off motion for steam engines,
which is designed to automatically shut the equilibrium valve or stop valve, in caso
the engine is running at a higher speed than safety will allow.
In proceeding to carry out our invention, we attach to the valve rod of the engine
a vertical upright, which receives the reciprocating movement of the valve rod. On
this vertical upright, wo mount a swinging pendulum, the oscillations of the
pendulum increasing or decreasing, just according to the speed of the engine.
Mounted on a support on the slide rest of the engine is a 1 lever, to one
horizontal extremity of which is connected a wire or cord, which passes over pulleys
to the equilibrium valve or stop valve of the engine. Attached to the vertical
extremity of the lever is a spring, which has a tendency to pull the vertical
extromity, and thereby depress that end of the lever to which the cord or wire is
connected. To prevent this action taking place until the required time, wo mount
on a stud a swivelling or spring catch piece, which engages with the opposito
horizontal extremity of the 1 lover, to that to which the cord or
attached.
wire is
So long as the engine is running at an ordinary rate, the oscillations of the
pendulum will not be sufficiently great to strike the retaining catch piece and relieve
the lever; but should the speed be excessive, the pendulum strikes and disengages
the catch-piece, thereby liberting the lover, and by the action of the aforesaid
spring thus drawing forward the wire or cord connection to shut off the steam. On
the retaining catch piece may be an adjusting scrow, which is designed to regulato
the distance between the pendulum and the catch piece, and thus allowing the
engine to run at a given speed, the blow or knock of the pendulum boing received
by the said retaining catch piece or screw.
The accompanying drawing is an olevation of our knocking off motion or stop-
gear for steam engines.
A is the valve rod of the engine. B the vertical upright, which is preferably
clipped thereto as shown at C, and receives the reciprocating movement of the
valve rod. Suspended at D from this vertical upright B is swinging pendulum E,
whose oscillations vary with the speed of the engine.
On the slide rest is mounted support G, to which is pivotted at H the 1 lever J.
To the branch K of this lever is connected wire or rope L, which is passed over
pulloys M, and is attached to the catch lever N of the equilibrium valve of the
ongine. Attached to the vertical extremity of the 1 lover J is a spring ◊ secured
to an upright on the slide rest F. This spring has a tendency to depress the
branch K of tho 1 lever, to which the cord or wire L is connected. The opposite
branch P of the lever is held by the retaining catch Pl pivottod at Q to the
support on the slide rest F when the engine is runing at its normal speed, but
should the speed of the ongine become excessive, the oscillations of the pendulum E
increase in range to such an extent as to strike the extrome portion of the
retaining catch P", and thus liberate the branch of the 1 lover, and with
the attendant recoil of the spring O, the branch K of the 1 lover is depressed so as
to raise the catch lever N of the equilibrium valve, the same being shut off by the
falling of the weight R in the usual manner. We prefor the weight to be stopped
in its fall just before the closing of the valve. The adjusting screw regulates
the striking distance of the pendulum E to allow the engine to run at a given
speed.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
elaim is :-
1

page_text: 2. Pendulum E suspended from upright B, mounted on the valve rod or
other reciprocating part of the engine, substantially as and for the purpose set
forth.
3. The lever or catch J, retaining catch piece P1 and spring O, substantially
as and for the purpose described and illustrated.
4. The combination of pendulum E with 1 lever or other suitable catch J,
retaining catch piece P¹ and spring 0, substantially as described and illustrated.
Dated this 11th day of Jule 1808
RICHMOND & Co.,
Chartered Patent Agents, 12, Standish Street, Burnloy.