Year: 1886

page_text: Date of Application, 29th July, 1886.
Complete Left, 19th Apr., 1887.
Complete Accepted, 20th May, 1887.
I CHARLES AMBROSE MCEVOY of The London Ordnance Works, Bear Lane,
Southwark in the County of Surrey, Engineer do hereby declare the nature of this
invention to be as follows:-
The object of the invention is to provide a fore or trunnion sight for ordnance which
can be seen readily at night. I employ for the fore sight a small vertical cone of
glass or transparent material mounted at the top of a stand such for example as is now
used for the trunnion sight. The stand I make hollow and place within it a small
electric lamp. When illuminated from below by the lamp the cone glows and appears
white and can readily be brought into a line between the back sight and any distant
object. The lamp being within the tubular stand is protected from all risk of injury.
The cone may be protected by a guard arched over at a short distance above it.
Preferably I make the stand with a stem at its lower end to drop into a socket on the
trunnion and lock it by a tube which can be slidden up and down upon it in the
ordinary way. The conducting wires to the lamp may be carried through the side of
the stand a slot being formed in the outer sliding tube for them to pass through with-
out impeding the tube from being slidden up or down.
Dated this 29th day of July 1886.
CARPMAEL & Co.,
Agents for the Applicant.

page_text: •
I, CHARLES AMBROSE MCEVOY of The London Ordnance Works, Bear Lane,
Southwark, in the County of Surrey, Engineer, 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 object of the invention is to provide a fore or trunnion sight for ordnance which
can be seen readily at night. I employ for the fore sight a small vertical cone of glass
or transparent material mounted at the top of a stand such for example as is now used
for the trunnion sight. The stand I make hollow and placo within it a small electric
lamp. When illuminated from below by the lamp the cone glows and appears white
and can readily be brought into a line between the back sight and any distant object.
The lamp being within the tubular stand is protected from all risk of injury. The
cone may be protected by a guard arched over at a short distance above it. Preferably
I make tho stand with a stem at its lower end to drop into a socket on the trunnion
and lock it by a tube which can be slidden up and down upon it in the ordinary way.
The conducting wires to the lamp may be carried through the side of the stand a slot
being formed in the outer sliding tube for them to pass through without impeding the
tube from being slidden up or down.
In order that my said invention may be most fully understood and readily carried
into effect I will proceed to describe the drawings hereunto annexed.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is an elevation of an illuminated trunnion sight for ordnance.
Figure 2 is a vertical section on the line 1. 1. in Figure 1.
Figures 3 and 4 show in elevation a guard which may be used in connection with
the sight.
Figures 5 and 6 represent also in elevation a guard of another form.
A is the stand of the sight-the stem A¹ at its lower end is adapted to drop into a
socket on the trunnion and to be locked there by the tube B which is free to slide for
a short distance up and down upon the stand as the drawing shows. A* is a cavity in
the interior of the stand in which the small electric incandescent lamp C is lodged.
The conducting wires for this lamp pass out through apertures in the side of the stand
and of the tube B. The aperture in the stand is guarded by a suitable gland A' A³ to
secure the conducting wires and prevent injury to the lamp. The gland also serves as
a stop to limit the movement of the tube B along the stand. The aperture A× is closed
at the top by a cover or nozzle piece A having at its upper end a socket in which a
piece of clear glass D is set. The lower part of this glass is cylindrical and at its
upper end it is brought to a conical point. The light from the lamp enters the glass
at its lower end and passing up through it, is reflected at the interior surface of the
cone and issues more or less horizontally, and the cone appears illuminated in such a
manner that it can be aligned with the notch in the rear or tangent sight.

page_text: The guard E in figures 3 and 4 is mounted on the exterior of the nozzle or cover A³ ;
it carries a projection in the form of an inverted V serving to protect the glass cone
from accidental injury; also when artificial light is not required it can itself be
employed as the sight point. By turning the guard around the nozzle piece A³ the
projection on the guard can be removed from the line of sight.
Figures 5 and 6 represent simply an arched guard to protect the glass cone.
In some cases other methods of illumination may be substituted for the use of the
electric lamp.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed I declare that what I claim is :-
1. My improved sight for ordnance consisting of a glass cone illuminated from
below so that the light enters at the base of the cone, is reflected internally at its
conical sides, and issues more or less horizontally.
2. The combination in a suitable stand or case of an incandescent lamp C and a
glass D with flat surface or base over the lamp and inclined reflecting upper surface
substantially as described.
3. My improved sight for ordnance substantially as described and represented by
the annexed drawings.
Date : 10+1 low of A 1007