Improved Means for Railway Signalling.
Year: 1892

page_text: Date of Application, 20th Dec., 1892
Complete Specification Left 20th Sept 1893-Accepted 16th Dec.
1893
PROVISIONAL SPECIFICATION.
Improved Means for Railway Signalling.
WILLIAM GRIMSLEY Watchmaker 121 High Street Thame Oxon GEORGE
MAKIN, Wesleyan Minister 33 High Street, Thame, Oxon. We do hereby declare
the nature of this invention to be as follows:-
For the engine when passing by the signal to set it at danger. This is done by
the wheel of the engine pressing down a small lever parallel with the rail; which
also presses down an horizontal lever running on to signal post, the duplex end of
which raises a perpendicular lever connected with arm of signal setting it at
danger, and locking it by means of a lever at base of signal post. In order for
the signalman to show the line clear he must by means of a chucker draw back
locking lever letting the signal arm fall;-and this is done by means of wire ropes
in the ordinary way.
Dated this 19th day of December 1892.
WILLIAM GRIMSLEY.
GEORGE MAKIN.
COMPLETE SPECIFICATION.
Improved Means for Railway Signalling.
We, WILLIAM GRIMSLEY, of 121 High Street, Watchmaker, and GEORGE
MAKIN of 33 High Street, Wesleyan Minister, both of Thame, in the County of
Oxfordshire, 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 :-
Our invention relates to an improved means for railway signalling, the object
being for the engine when passing by the signal to set it at danger.
This is done by the wheel of the engine pressing down a small lever parallel
with the rail; which also presses down an horizontal lever running on to signal
post, the duplex end of which raises a perpendicular lever connected with arm of
signal setting it at danger, and locking it by means of a lever at base of
signal post.
In order for the signalman to shew the "line clear," he must by means of a cam,
draw back locking lever letting the signal-arın fall.
And in order that our invention may be thoroughly understood, we now proceed
to describe the accompanying drawing thereof, reference being had to letters and
figures inarked thereon.
Fig. 1, is a plan of the track and mechanism for operating the signal.
Fig. 2, is an elevation of lever d.
Fig. 3, is an elevation of lever c.
Fig. 4, is an elevation of lever b.
Fig. 5, is a side elevation of the base of the signal post.
Parts of the figures are broken off for convenience.
Opposite the signal post 9 parallel with the rails a is a pivoted lever b connected
to the signal rod by a pivoted rocking rod f so that when the rim of the wheel of
an engine passes over the lever b the signal is set at danger. At the base of the
signal post g is a drum on a shaft with a weighted lever i.
"
"central lever
In the centre or thereabouts is placed a lever c herein termed a
with a spring e and is locked by cranks and rods connected to a hand lever m.
The hand lever k forces the spring catch n away from the lever c, after the lever d

page_text: is lowered.
The aforesaid hand lever is connected by a rod o' to a pivoted
crank o¹ and the said crank o" is connected to a pivoted T piece p for the purpose
of forcing the spring catch n away from the lever d, and by another hand
the block g on the rod r is drawn under the lever e to lock the same.
A similar
block is provided on the rods to lock the lever d. An adjustable wheel
having a groove with a chain t passing around and over the drum is provided for
working the signal. The said wheel is connected to the rod r by a pivoted bar u.
The whole of the aforesaid levers are to be kept locked until the train has gone
out of the station and passed over lever d where this mechanism is fixed, when the
signalman by manipulation of first-the hand lever and secondly the hand
lever m sets the line again clear. The contact lever is set at safety by the
signalman working the hand lever m and the contact lever c by the signalman
operating the hand lever k.
The rim of the wheel of the engine when passing the signal presses down the
lever b and the rocking rod f the other end of which raises the perpendicular
signal rod h connected with the arm of signal setting it at danger, and locking it
by means of a spring and draw back lever o at base of signal post. In order
for the signalman to shew the line "clear" he must by means of hand lever m
operate the cam vl and pin v" on the draw back locking lever thereby letting
the signal arm fall; this is done by means of wire ropes in the ordinary way.
The object of the levers c and d is that when the rim of the wheel of an engine
or carriage pass over the levers c and d it presses down the free ends, and
these said ends are locked in that position by the spring catches n falling in
receptacles e as in Figs. 1, 2, and 3, and before the signalman can set the signal
at safety " he must unlock the levers c and d by pressing the hand lever k
forward towards the line. Previous to the unlocking of the levers the signalman
see that the line is clear.
The main object of the levers c and d is to prevent the signalman from mani-
pulating the hand lever m to place the signal at "safety" until he has worked the
hand lever k. It is intended that levers c and d act as a check against the
signalman placing the signal at safety before the station or line is clear.
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
claim is :-
1. In a railway signal, the lever 6 which presses down the rocking rod f and the
end of rocking rod with signal rod to operate the signal and set same at danger
when the rim of a wheel presses down the lever b, substantially as herein described
and according to the accompanying drawing.
2. In a railway signal, the combination of the drum ; and the pin " and spring
lever with the end of the rocking rod f, substantially as herein described.
3. In a railway signal, the combination of the hand lever k spring catches
levers c and d, with rods o and s, cranks and block 7, substantially as herein
described and according to the accompanying drawing.
4. In a railway signal, the combination of the wheel hand lever m pivoted bar u
rod and block 7, substantially as herein described.
5. In a railway signal, the combination of. the apparatus Substantially as herein
described and illustrated in the accompanying drawing.
Dated this 20th day of September 1893.
J. P. BAYLY,
18, Fulham Place, W., Agent for the Applicants.