Iprovements in Sighting Gear for Heavy Guns.
Year: 1890

page_text: Date of Application 17th Oct., 1890
Complet Specification Left, 16th July, 1891-Accepted, 22nd Aug., 1891
PROVISIONAL SPECIFICATION.
Iprovements in Sighting Gear for Heavy Guns.
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We, EDWAP WILLIAM LLOYD, formerly a Commander in the Royal Navy,
and RALPH THEW BRANKSTON, Engineer, both of Elswick Works, Newcastle on
Tyne, do hereby declare the nature of this invention to be as follows:-
The invention ates to the sighting of a gun mounted in any position where it
would be inconvent to attach the sights to the gun itself, and is especially of.
use where it is desirable to take a line of sight very much inclined to the horizontal
line.
The gun may be elevated as usual by means of a toothed arc attached to the
gun and gearing connecting this arc with a hand wheel. To carry the sights a
toothed-segment pivotted upon a fixed horizontal axis is provided in a convenient
position.
The rear sight extends radially from the axis or may be fixed independently.
The fore sight is carried on a curved bar sliding upon the toothed segment.
The motion necessary for the movement of the sights is derived from the toothed
arc attached to the gun; from this arc a train of gear transmits the movement to
any convenient position in which it may be found desirable to place the sighting
apparatus. The segment receives angular movement degree for degree. from the
gun. The rear sight remains at a fixed distance from the axis of the toothed
segment and the adjustment for varying ranges is obtained by altering the position
of the fore sight by sliding the bar which carries it more or less out of the guide
or groove in the segment. This movement is obtained by means of a hand wheel
which drives a worm or pinion gearing into a toothed arc attached by an arm to the .
sliding bar.
The bar moves in a circular course concentric with the axis of the segment or
at a tangent to their course in which case a straight bar could be used. Thus the
adjustment for varying range is obtained by moving the fore sight, in lieu of moving.
the rear sight as is usual.
Or the apparatus may be arranged as follows:-The toothed segment receiving.
angular motion degree for degree from the gun as above described:may be provided
with a bar upon which both fore and rear sights are carried. Both sights here
follow a circular path the angular motion being degree for degree equal to that of
the gun. Adjustment is obtained by altering the position of the rear sight bar by
means of the mechanism usually provided for the adjustment of the rear sight.
Dad thin 15th dox of Catcher 1800
E. W. LLOYD.
R. T. BRANKSTON.
COMPLETE SPECIFICATION.
Improvements in Sighting Gear for Heavy Guns.
We, EDWARD WILLIAM LLOYD, formerly a Commander in the Royal Navy,
and RALPH THEW BRANKSTON, Engineer, both of Elswick Works, Newcastle on
Tyne, 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 :-
This invention relates to the sighting of guns which are so mounted that it is
inconvenient to attach the sights to the gun itself.
A toothed segment pivotted on a fixed horizontal axis is provided in a convenient
D
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page_text: In Figure 2 the segment k is different in form; its axis is carried by a
stationary support on which also are bearings for the axis l. There is a bevilled
pinion at the upper end of the axis engaging with teeth on the segment k.
At the lower end of the axis is a hevilled wheel 2 in gear with a corresponding
pinion d² on the axis d. As before the gear is such that the angular movements
of the gun and segment are equal.
The segment carries a fore sight m and a rear sight n, the latter on a
straight sight bar adjustable for range up or down in a socket upon the
segment.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what we
claim is :-
1. Sighting gear for heavy guns in which a segment pivotted on a stationary
support is geared with the gun so as to incline with it degree for degree and in
which such segment carries an adjustable stem on which is a fore sight; a rear
sight also being provided over the pivot or axis of the arc.
2. Sighting gear for heavy guns in which when the gun is elevated or depressed,
a curved rack concentric with the trunnions, by means of intermediate axes and
toothed wheels, gives motion to a segment carrying the sight or sights and causes
the segment to turn about an axis, thus moving in a plane parallel to that in which
the gun moves and degree for degree through equal angles.
3. Sighting gear for heavy guns in which a fore sight is mounted at a distance
from the gun on an independent support in such manner that it may be adjusted in
accordance with the range required and in which such fore sight is also so geared
with the gun that as the muzzle of the gun is raised the fore sight receives a
similar movement, the axis of the gun and the line of sight making equal angular
movements.
4. Sighting gear substantially as represented by the annexed drawings.
EDWARD W. LLOYD.
R. T. BRANKSTON.