ANOTHER METHOD OF SIGNALLING.
Year: 1889

page_text: Date of Application, 15th Feb., 1889
Complete Specification Left, 7th Nov., 1889-Accepted, 4th Jan., 1890
When the wheels of the train of hutches (or if waggons & carriages of the apparatus
is used on a railway,) pass over the short insulated pieces of rail the circuit is complete:
The current passes by the wheels & axles to the opposite rail & thence to the battery,
ringing the electric bell, & by means of the electro magnet drawing round the dial &
thus indicating the distance traversed.
2ND. ANOTHER METHOD OF SIGNALLING.
The indicating dial is dispensed with. A short length of each rail at the head & at
the bottom of the mine is properly insulated from the intermediate stretch of rails and
this intermediate. stretch of each line of rails has a conductor from the head of the
mine to the battery. . Whenever the wheels of the train of hutches (or of the system
is used in a railway of waggons & carriages) passes on to the intermediate stretches of
rail, the circuit is complete and the electric bell will continue ringing until the train
dasses off the stretch.
3RD. TO STOP THE STEAM ENGINES WHEN SIGNALS ARE GIVEN BY No. 1.
The rail opposite that which has the insulated intermediate stretches; has also an
insulated stretch at the head & at the foot of the mine or pit opposite those on the
other rail. These two stretches are connected by a conductor which runs from the
stretch at the head of the mine (instead of from the whole rail as in No. 1) to an
electro magnet and thence to the battery. The electro magnet is placed below a small
steam cylinder the piston rod of which is made to operate the regulator handle of the
steam

page_text: OPERATION OF THE APPARATUS.
When the wheels of the train of hutches (or if the system is used on a railway of
waggons & carriages) pass on to the insulated stretches on each rail at the head or
foot of the mine, the circuit is complete, the current passes to the electro magnet,
which then draws & opens the valve of the small cylinder, which in turn operates the
steam regulator handle & shuts off the steam. The escape steam from the small
cylinder can be led by a pipe to a steam whistle, so that each time the engine is
stopped the whistle will be sounded.
If desired the electric bell may be dispensed with and the electro-magnet made to
open the valve of a small cylinder thus letting steam pass through it and a pipe, into
the steam whistle.
4TH. ARRANGEMENT WHEN THE MINE OR PIT IS WORKED BY A VERTICAL SHAFt
INSTEAD OF AN INCLINED PLANE.
'Instead of the 2 rails in the ground a vertical slide or guide, on each of the two
opposite sides of the shaft is used. These guides are arranged insulated, and connected
with the battery in the manner described under Nos 1, 2, 3. A small pulley or wheel
on each side of the cage & connected with each other passes over the guides. Each
time a pulley passes over an insulated intermediate stretch, the circuit is complete, the
bell rings & the indicator is operated & the steam also shut off if the apparatus in
No. 3 is used.
5TH. METHOD OF CAUSING INTERMITTENT CURRENTS OF ELECTRICITY OR MAGNETISM
FOR SIGNALLING AND THE LIKE.
Two rails or slides are placed parallel with but insulated from each other, with short
intermediate stretches insulated at the ends, & otherwise, but connected with each
other & the battery. A brush or a wheel or two wheels on the same axle, passes over
them. Each time the wheel or wheels or brush passes over the intermediate
insulated stretches the circuit is complete when the wheel passes off the insulated
stretches the circuit is broken.
Dated this 14th day of Rohn 1980
COMPLETE SPECIFICATION.
Apparatus for Signalling in Minės and Coal Pits and on Railways
and elsewhere, and for Stopping the Winding or Hauling Steam
Engines when such Signals are Given.
I HENRY JAMES PEDDIE Engineer Tynecastle Iron Works Gorgie Road Edinburgh
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:―
1ST. APPARATUS FOR SIGNALLING IN MINES & COAL PITS ON RAILWAYS &
ELSEWHERE.
From one pole of an electric battery A Fig. I a conductor B runs to the rail (.
From the other pole of the battery a conductor D, with an electric bell and an electro
magnet F in circuit runs to the rail E. The rail C has short insulated lengths a
connected together by the conductor Z. The battery A may be dispensed with, and
any suitable supply of electricity be used instead.
Operation. When the wheels of the train pass over the insulated lengths a the circuit
is complete, the current will pass by the wheels & axles to the rail E & thence back to

page_text: the progress of the train, or the valves of cylinders which are intended to operate the
regulator handle of the hauling or Winding Engines, & shut off the steam, all as fully
described under the first four headings of this specification.
Dated this 5th day of Novembar 1889
HENRY JAMES PEDDIE.