Improvements in Appliances for Directing the Discharge of Ordnance, Torpedoes, and other Missiles at Night.
Year: 1886

page_text: Date of Application, 2nd Apr., 1886.
Complete Left, 3rd Jan., 1887.
Complete Accepted, 4th Feb., 1887.
Improvements in Appliances for Directing the Discharge of Ordnance,
Torpedoes, and other Missiles at Night.
I, HUBERT HENRY GRENFELL of Elswick Works, Newcastle on Tyne, Commander
R.N. do hereby declare the nature of this invention to be as follows:-
:-
I direct beams of light through two glass or other spherical lenses set at a distance
apart from one another and both set so as to receive the light from the same or nearly
the same direction. By the concentration of the rays of light on the surfaces of the
lenses opposed to the direction from which the beams are proceeding I obtain two or
more points of light which can be aligned in the direction required.
I either fix the apparatus directly to the gun, torpedo tube, or other appliance for
discharging missiles, or connect it thereto by bars or otherwise, so that it moves in
correspondence therewith, or I attach it to a directing instrument such as is used.
for the purposes during day time, or lastly I place and use the apparatus separately.
Preferably I employ an electric lamp. There may be as separate lamp, one at the
back of each lens, and the two lamps and lenses may for example be applied to a gun
independently one of the other, or both lenses may be carried by arms extending from
the two opposite ends of one hollow staff or bar having in its interior an electric or
other lamp from which light is reflected through both lenses.
The lamp may be at the centre of the hollow staff or bar and light from it be
deflected by inclined mirrors through the two lenses, or the lamp might be at one end
of the staff or bar and an inclined mirror at the opposite end.
CARPMAEL & Co.,
Agents for the Applicant.

page_text: Improvements in Appliances for Directing the Discharge of Ordnance,
Torpedoes, and other Missiles at Night.
I, HUBERT HENRY GRENFELL of Elswick Works, Newcastle-on-Tyne, Commander
R.N. 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:-
I direct beams of light through two glass or other spherical lenses set at a distance
apart from one another and both set so as to receive the light from the same or nearly-
the same direction. By the concentration of the rays of light on the surfaces of the
lenses opposed to the direction from which the beams are proceeding I obtain two or
more points of light which can be aligned in the direction required.
I either fix the apparatus directly to the gun, torpedo tube, or other appliance for
discharging missiles, or connect it thereto by bars or otherwise, so that it moves in
correspondence therewith, or I attach it to a directing instrument such as is used for
the purposes during day time, or lastly I place and use the apparatus separately.
Preferably I employ an electric lamp. There may be a separate lamp, one at the
back of each lens, and the two lamps and lenses may for example be applied to a gun
independently one of the other, or both lenses may be carried by arms extending from
the two opposite ends of one hollow staff or bar having in its interior an electric or
other lamp from which light is reflected through both lenses.
The lamp may be at the centre of the hollow staff or bar and light from it be reflected
by inclined mirrors through the two lenses, or the lamp might be at one end of the
staff or bar and an inclined mirror at the opposite end.
The drawings annexed show examples of sighting appliances formed as above,
described.
Figure 1 is a longitudinal section of a sighting appliance for a director-A is a
tube or hollow staff-B an incandescent electric lamp at one end thereof--C insulated
wires passing to the lamp-D D tubes branching out at an angle from the tube A-
EE spherical lenses held at the end of the branch tubes D. To one of the lenses
light passes direct from the lamp B and is directed to the other by the inclined
mirror F.
Figure 2 is a back elevation and Figure 3 a longitudinal section of a fore sight for
a gun-D is a tube inclining backwards-E a spherical lens carried at the top of the
tube and B an incandescent electric lamp within the tube-Care insulated wires
passing to the lamp.
Figure 4 shows a back elevation and Figure 5 a side elevation of a back sight
for a gun-A is a tube containing an electric lamp B-D a tube branching out there-
from and inclining backwards-E the spherical lens carried at the top of the tube D--
C are the insulated wires.

page_text: Having now particularly described and ascertained the nature of my invention
and in what manner the same is to be performed I would state that I do not confine
myself to the exact construction shown in the drawings hereunto annexed but I declare
that what I claim is :-
1. A sighting appliance consisting of two spherical lenses set at a distance apart
and means for directing through both lenses beams of light inclined to a line passing
from one lens to the other.
2. A sighting appliance composed of two spherical lenses carried by arms extending
from the two ends of a hollow staff or tube having in its interior an electric or other
lamp from which light is directed through both lenses.
3. Sighting appliances constructed substantially as herein before described and
illustrated in the drawing annexed.
CARPMAEL & Co.,
Agents for the Applicant.