provements in and relating to Grouping Fuses Used in Blasting, and in Apparatus therefor.
Year: 1899

page_text: Date of Application, 29th Apr., 1899
Complete Specification Left, 29th Jan., 1900-Accepted, 3rd Mar., 1900
RIVAL DIATION
Improvements in and relating to Grouping Fuses Used in Blasting,
and in Apparatus therefor.
I, WILLIAM FRANCIS BENNETT, of Roskear Fuse Works, Camborne, Cornwall,
Fuse Manufacturer, do hereby declare the nature of this invention to be as
follows:-
This invention, which relates to grouping fuses used in blasting, has for its
object to enable a series or group of shots" to be successively exploded in
predetermined order and at given intervals of time from a place of ignition
common to all the fuses appertaining to the said series or group.
According to this invention, the fuses converge, from the several charges, on
a sheet-metal holder or frame fitted with igniters, being sleeves or sockets having
priming or igniting ends contained within the holder or frame. The sockets,
which are placed at desired distances apart, project through the frame, and the
fuses are inserted in the sockets. A slow "match" or train of "slow" firing
composition is laid along the frame and connects the heads or priming ends of
the igniters of the series.
Ignition of the fuses may be effected either by electricity or by a powder fuse.
In the latter case, the powder fuse is inserted in one end of the holder.
When electricity is the firing agent employed, the wires from the battery are
led into one end of the holder aforesaid. The operator is enabled to withdraw
the electrical cable out of the way of possible damage as soon as the junction
has been fired and before the explosion of the blasting shots."
"
By the apparatus above described, the shots are fired at given and appreciable
intervals of time apart, and, accordingly, the advantage is obtained that where
a quantity of rock is required to be dislodged it can be arranged that the first
shot or shots of a series can be fired so as to first remove such portion or portions
of rock as might offer resistance to the following shots. Hence the entire blast
is made with greater effect.
The intervals of time between the firing of the fuse igniters in the holder can
be extended by placing between the heads of the igniters plugs of metal or
other incombustible material. Through holes made in these plugs the train
connecting the igniting heads of firing composition is laid.
By this means the fire is slowly conveyed throughout the length of the holder,
igniting each head in turn.
Dated this 28th day of April 1800
NICHOLAS WATTS.
Chartered Patent Agent, Bristol.

page_text: Improvements in and relating to Grouping Fuses Used in Blasting,
and in Apparatus therefor.
I, WILLIAM FRANCIS BENNETT, of Roskear Fuse Works, Camborne, Cornwall,
Fuse Manufacturer, 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:-
دو
This invention, which relates to grouping fuses used in blasting, has for its
object to enable a series or group of shots to be successively exploded, in
predetermined order and at given intervals of time from a place of ignition
common to all the fuses appertaining to the said series or group.
According to this invention, the fuses converge, from the several charges, on
a sheet-metal holder or frame fitted with igniters, being sleeves or sockets having
priming or igniting ends contained within the holder or frame. The igniters,
which are placed at any desired distances apart, project through the holder. The
fuses are inserted in the sockets. A slow matchi or train of "slow firing
composition is laid inside the holder and is in firing communication with the
heads or priming ends of the igniters of the series.
"
21
Ignition of the fuses may be effected through the holder, either by electricity
or by a powder fuse. When electricity is the firing agent employed, the wires
from the battery are led into one end of the holder aforesaid. The operator is
enabled to withdraw the electrical cable out of the way of possible damage as
soon as the junction has been fired, and before the explosion of the blasting
⚫ shots."
++
Referring to the accompanying sheet of illustrative drawings, Fig. 1 repre-
sents, in side elevation, a fuse coupler designed in accordance with this invention
for grouping fuses for the purposes above set forth. Fig. 2 is a cross section,
Fig. 3 a longitudinal section, and Fig. 4 a plan.
The fuse coupler consists of a frame a, of sheet tin or other suitable metal,
having apertures therein at suitable distances apart to permit the
igniters to project through. From each igniter bis led off a
separate and distinct fuse from the coupler to the respective separate
blasting charges. The igniters have priming or igniting heads contained
within the holder a. Firing communication between the whole series of igniters
is established by a slow match or train of "slow" firing composition laid
inside the holder. As a convenient means of igniting the slow match or train
of slow firing composition, an igniter similar to the igniters is inserted in
each end of the holder a.
"
The shape and construction of the holder a may be varied, and the igniters
may be differently placed therein to accommodate themselves to differences of
shape or construction of the holder. The holder may be made as a box having one
part hinged to the other, or it may be made with one part adapted to be slid over
ledges provided in the other part.
By the apparatus above described, shots can be fired at given and governed
intervals of time apart, and, accordingly, the advantage is obtained that where
a quantity of rock is required to be dislodged it can be arranged that the first
shot or shots of a series can be fired so as to first remove such portion or portions
of rock as might offer resistance to the following shots. Hence the entire blast
is made with greater effect.
The intervals of time between the firing of the fuse igniters in the holder
can he extended by placing between the heads of the igniters plugs of metal or

page_text: other incombustible material. Through holes made in these plugs the train
connecting the igniting heads of firing composition is laid.
By this means the fire is slowly conveyed throughout the length of the
holder, igniting each head in turn.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, I declare that what I claim is :-
1 Arrangement of a set of fuses in groups to a series of shots, so that each,
while fired from a common source, is independently ignited at determined inter-
vals of time, substantially as hereinabove described.
2. A fuse coupler for blasting fuses, consisting of a casing or frame for holding
igniters such as b with the igniting ends contained within the casing or frame, and
having apertures for the sockets of the igniters to project through to receive and
ignite a series of fuses separately connected to different blasting charges, sub-
stantially as hereinabove described.
thin 5. ATAU
1004
NICHOLAS WATTS,
Chartered Patent Agent, Bristol.