Year: 1888

page_text: A communication from GEORGES MANET, Electrician, and CHARLES MANET, Engineer,
of 61, rue Lecourbe, Paris, in the Republic of France.
1, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
M.I.M.E. do hereby declare the nature of this invention to be as follows:-
The principle on which this apparatus is based consists in the utilisation of the
accumulation of the rotary speed communicated mechanically to the bobbins of a
dynamo or similar machine which turn with open circuit .e. without producing
electrical work, and in the utilisation of the inertia of the moving parts to obtain an
instantaneous transformation of the work resulting from the motion into electrical
energy for the purpose of firing mines or the like or of igniting gas cr other aeriform
fluids in motors or otherwise.
In this apparatus we employ a dynamo machine in which two Gramme or other
bobbins are mounted on the same spindle and the same field magnets surround both
the bobbins to which a high rotary speed may be communicated by means of a train
of wheels and pinions and a crank and handle, the latter being situated outside the
box or casing containing the apparatus. In this case is further suitably supported an
automatic contact making mechanism which may be actuated by centrifugal force or
by a regulator having vanes or flies or by the currents produced by the apparatus
itself or other suitable means.
An electric bell of the trembler type or other suitable indicator is mounted in the
box and indicates to the operator the state or condition of the outer circuit in which
are the line wires and the cartridge to be fired. (These cartridges form the subject
of the application No. 7408 of 1888).
In the side of the hermetically closed casing is a suitable stuffing box through
which passes the shaft carrying the crank and handle and this stuffing box is to
prevent the admission of fire damp or other gases.

page_text: The casing is further provided with two terminal screws for the line wires.
The working of the apparatus is as follows: The line wires in which are included
the electric cartridges are connected with the apparatus by means of the terminal
screws and then the handle is turned. If now the line wires are in perfect order for
the firing of the cartridges, the current developed in one of the bobbins turning
between the field magnets will be intense enough to actuate the bell indicator con-
nected therewith by means of a spring actuated lever and a contact screw of the
contact making mechanism.
The two bobbins continuing to turn with increasing velocity, balls sliding on
radial rods of one of the gear wheels and held towards the centre thereof by means of
spiral springs will by the centrifugal forco gradually recedo from the axis of rotation
and move a sleeve sliding on the spindle of the wheel. To this sleeve is pivotted the
above mentioned spring actuated lever which carries contact springs on opposite
sides, one bearing against the contact screw of the bell mechanism and the other
against a stop. The movement of the sleeve will turn this lever and the contact of
the contact springs will be broken and the bell will cease to ring. The speed of the
wheel still increasing the balls will still recede further and move the sleeve and the
lever until the contact springs of the latter make contact with two other contact
screws thus closing simultaneously the current of one of the bobbins with the circuit
of the inductors of the dynamo and the current of the other bobbin with the outer
circuit including the electrical cartridges, and it is at this moment that the mechanical
movement is instantaneously transformed into electrical energy.
Datad this 20th day of Mov 1940

page_text: Improvements in or relating to Electric Apparatus for Firing Mines
and the like.
A communication from GEORGES MANET, Electrician, and CHARLES MANET, Engineer,
of 161, rue Lecourbe, Paris, in the Republic of France.
I, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
M.I.M.E., 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 :—
The principle on which this apparatus is based consists in the utilisation of the
accumulation of the rotary speed communicated mechanically to the armature of a
dynamo or similar machine which turns with open circuit i.e. without producing
electrical work, and in the utilisation of the inertia of the moving parts to obtain an
instantaneous transformation of the work resulting from the motion into electrical
energy for the purpose of firing mines or of igniting gas or other aeriform fluids in
motors or otherwise.
In the accompanying drawings:
Fig. 1 represents a vertical section of the apparatus on line A B C D of figure 3.
Fig. 2 represents a vertical section of the same on line E F G H of figure 1.
Fig. 3 is a horizontal section on line 1 J of Fig. 1.
In this apparatus we employ a dynamo machine in which two "Gramme" or other
bobbins a a¹ are carried on the same spindle, which is mounted between centres bb,
and the same field magnets cc surround both the bobbins to which a high rotary
speed may be communicated by means of a train of wheels d d and pinions e e
and a crank handle g situated on the outside of the casing of which contains the
apparatus.
In this casing is further supported on a bracket an automatic contact making
mechanism,which may be actuated by a centrifugal force as represented in the
drawings or by a regulator having vanes or flies or by the electric currents pro-
duced by the apparatus itself or other suitable means.
An electric belli of the vibrating type or other suitable indicator is mounted in
the box and indicates to the operator the state or condition of the outer circuit in
which are the line wires and the cartridge to be fired. (These cartridges or fuses
form the subject of our application No. 7408/88).
In the side of the hermetically closed casing is a suitable stuffing box j through
which passes the spindle carrying the crank handle y and this stuffing box is to
prevent the admission of fire damp or other gases.
The casing is further provided with two terminal screws for the line wires.
The working of the apparatus is as follows:-
:-
The line wires in which are included the electric cartridges or fuses are connected
with the apparatus by means of the terminal screws k and then the handle is

page_text: rotated. If the line wires are now in perfect order for the firing, the current
developed in the bobbin a turning between the field magnets c will be intense enough
to actuate the indicator i connected therewith by means of the arm 7 and the contact
screw m of the contact mechanism.
The two bobbins continuing to turn with increasing velocity the balls n n sliding
on radial rods of the gear wheel d' and held towards the centre by means of spiral
springs, will by the centrifugal force gradually move away from the axis of rotation
and move the sleeve o sliding on the spindle of the wheel. To this sleeve o is
pivotted the above mentioned spring actuated. lever p which carries the contact arm
and spring and y on opposite sides, one bearing against the contact screw m and the
other against a stop r.
The movement of the sleeve o will turn this lever and the
circuit. will be broken and the bell therefore cease to ring. The speed of the wheel
still increasing the balls will move outwards further and move the sleeve o and the
lever p until the contact arm and spring of the latter will make contact with the
contact screws and thus closing simultaneously the current of the bobbin a¹ with
the circuit of the indicators of the dynamo, and the current of the other bobbin a with
the outer circuit including the electrical cartridge or fuse and it is at this moment
that the mechanical movement is instantaneously transformed into electrical energy.
V
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, as cominunicated to me
by my foreign correspondents I declare that what I claim is:-
1. In an electric apparatus for firing mines or the like in which a dynamo or
magneto-electric or other similar machine rotating with open circuit at high speed
the instantaneous transformation of the work resulting from this motion into electrical
energy substantially as and for the purpose specified.
2. The employment of an indicator of any suitable kind-in-combination-with-the
above described apparatus, for the purpose of indicating the condition of the outer
circuit which includes the line wires and the electric cartridge or fuse..
3. In an apparatus such as described the employment of a contact making
mechanism actuated by centrifugal force or by a regulator having vanes or flies or
by the currents produced by the apparatus itself or any other suitable-means-for-the
_ purpose-of-automatic-distribution of the currents.
nia il: sau 1
1000