Year: 1887

page_text: Date of Application, 29th Aug., 1887
Complete Left, 1st Dec., 1887
Complete Accepted, 6th Jan.. 1888
I, HERBERT JOHN ALLISON, of the firm of Allison Brothers, of 52 Chancery Lane,
London, in the County of Middlesex, Patent Agents, do hereby declare the nature of
this invention, which has been communicated to me from abroad by William Lyman,
of Middlefield, Connecticut, United States of America, Manufacturer, to be as
follows:-
The said invention relates to a wind guage sight for firearms and has for its main
object to provide for the lateral adjustment of the line of sight to compensate for the
action of the wind upon the projectile and also to provide for elevating the sight.
The invention consists chiefly in the combination of a sight post with a conical
eccentric which is seated in a suitable base and adapted in its rotation to swing the
sight in a conical path. It also consists in the novel means employed for elevating
the sight.
The base of the sight is secured to the stock of the gun, being designed for a rear
sight, and is formed with a vertical conical seat or bearing which receives a
corresponding conical plug or sleeve. This conical plug receives a cylindrical sleeve
held in place by suitable pins and the sight post is inserted through this sleeve.
The upper part of the cylindrical sleeve is formed with a journal eccentric to the
bore of the sleeve, which journal receives an adjusting nut. The adjustable nut is
held in place by a removable collar. The sight post is inserted through the
cylindrical sleeve and is provided with a rack which intermeshes with the adjusting
nut, the cylindrical sleeve being provided with a slot for that purpose.
The conical eccentric is formed with a worm thread which engages with a screw
journalled in the base, and as the screw is turned said eccentric is turned through a
portion of a circle, which carries the sight post in a conical path, thus throwing it to
either side of the line of the axis of the barrel. This worm screw is provided with a
self disengaging clutch which prevents the accidental turning of the screw.
sight is jointed to the sight post to permit of its being thrown both forward and
backward. To attain this object the part which carries the sight has a tongue hinged
between ears on the sight post and a T-headed plunger is inserted in a perforation
The

page_text: formed in the sight post which plunger is kept up against the tongue by a suitable
spring. The tongue and plunger are both formed with shoulders or stops which
limit the swing of the sight. The aperture through the sight is enlarged in the
interior of the sight to form a darkened chamber.
لسم
"
+ 1002
ALLISON BROS.,
Agents for the Applicant.
I, HERBERT JOHN ALLISON, of the firm of Allison Brothers, of 52 Chancery Lane'
London, in the County of Middlesex, Patent Agents, do hereby declare the nature
of this invention, which has been communicated to me from abroad by William
Lyman, of Middlefield, Connecticut, United States of America, Manufacturer, and in
what manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
The said invention relates to a wind guage sight for firearms and has for its main
object to provide for the lateral adjustment of the line of sight to compensate for
the action of the wind upon the projectile, and also to provide for elevating the sight.
The invention consists chiefly in the combination of a sight post with a conical
eccentric which is seated in a suitable base and adapted in its rotation to swing the
sight in a conical path. It also consists in the novel means employed for elevating
the sight.
In the accompanying drawings Fig. 1 is a rear elevation of my improved sight,
and Fig. 2 is a central vertical section in the line of the axis of the gun barrel.
Fig. 3 is a rear elevation of the sight partly in section showing the lateral adjust-
ment. Fig. 4 represents two views of the upper part of the sight post. Figs. 5 and 6
are horizontal sections on the lines x, x, and y, y, Fig. 2. Fig. 7 shows the lower
side of the adjusting nut. Fig. 8 is a section through the sight cup, and Fig. 9 is a
horizontal section on the line z, z, Fig. 2.
Referring to the drawings the sight base A, is secured to the stock of the gun R,
being designed for a rear sight, and is formed with a vertical conical seat or bearing
which receives a corresponding conical plug or sleeve, B. The conical plug is
perforated about parallel to one side, thus forming a conical eccentric, and receives a
cylindrical sleeve, c, which is also perforated throughout and has a collar, d, resting
upon the top of the conical sleeve. Above the collar the sleeve is turned eccentric to the
bore thereof, and an elevating nut, E, is placed thereon, and held by a suitable nut, d³,

page_text: screwed onto the upper end of the sleeve. The sight post, f, is inserted through the
sleeve, c, and has a rack, c', which intermeshes with the threads of the clevating nut, E.
The turning of the nut, E, therefore adjusts the height of the sight, the sleeve, c,
being kept from revolving by a suitable stationary pin, c², which enters a slot in the
sleeve. Both the sleeve, and conical eccentric are held down by a pin, e¹, passing
through a notch in the sleeve, and kept pushed downward by a spring, e².
The sight post is graduated to denote the height of the sight, and a spring pawl, i,
is arranged under the elevating nut, and adapted to catch in suitable ratchet notches,"",
in the nut, so that the turns of the nut may be counted, to estimate the adjustment
without reference to the scale.
The conical eccentric is provided with a worm thread, 2, on its front side, and a
screw, y, is journalled transversely through the base, and intermeshes with the worm
thread on the cone. The screw is held in place by a fixed pin, i, lying in a groove, i,
therein, and as the screw is turned the conical eccentric is rotated. This rotation of
the cone carries the sight post in a conical path, thus throwing it to either side of the
axis of the barrel as required, to compensate for the effect of the wind on the
projectile, as shown in Fig. 3. The head of the screw is preferably provided with a
self disengaging clutch collar, g', actuated by a suitable spring, g², so that the screw
cannot be turned accidentally or without the clutch head being first thrown in.
For long range firing, which involves a high sight post, the upper part of the post
is preferably hinged to the lower part to admit of being turned down both forward
and rearward. In this case a T shaped part, h, is inserted in a hole in the lower
part of the post and adapted to bear up against the tongue, k, on the upper part of the
post, the tongue and T part being provided with stop shoulders, I, to limit the swing
of the upper part. A spring is inserted in the hole, p, to thrust the T part upward,
thus normally holding the sight upright, as shown.
J, in the drawings represents a cup or disc sight, adapted for target practice. The
aperture in this sight is enlarged in the interior thereof to form a dark chamber, n, or
non reflecting passage which prevents dazzling effects of light on the sides of the
aperture, thus securing better aim.
It will be seen that several means may be used for turning the conical eccentric,
but the method described is preferable. Instead of a conical eccentric a plain eccentric
may be used, but it will not throw the sight as far laterally. A graduated scale
should be placed on the base to mark the degree of the lateral displacement of
the sight.
Having now particularly described and ascertained the nature of the said
Invention, and in what manner the same is to be performed, I declare that what I
claim is :-
1. In a wind guage sight for firearms, the combination of a base having a circular
seat or bearing, an eccentric bushing or part journalled in the bearing, and a sight
mounted on and carried by the bearing, and means for turning the eccentric bushing
to adjust the sight laterally, substantially as described.
2. In a wind guage sight for firearms, the combination of a base having a conical
seat or bearing, a conical eccentric or part fitted to turn in the bearing, a sleeve
journalled in the eccentric and held from turning with respect to the base, a
sight post fitted in the sleeve at an angle to the axis of the conical eccentric, and an
operating screw for rotating the eccentric to adjust the sight laterally.
3. In combination, a base having a conical seat or bearing, a conical eccentric
seated in the bearing, and perforated at an angle to its axis; a sleeve journalled in
the eccentric and held from rotating with respect to the base, a sight post received in
the sleeve and provided with a lengthwisecrack, andjan elevating nut mounted on the
sleeve and intermeshed with the rack to adjust the sight vertically, and a screw for
rotating the conical eccentric to adjust the sight laterally.
4. In a sight for firearms a peep sight having its sight aperture enlarged between
the ends or entrances of the same to form a darkened chamber or non reflecting
passage for light through the cup or disc of the sight.

page_text: 5. In a sight for firearms, the combination of the elevating nut, E, screw threaded
internally and having ratchet notches on its lower side; the sleeve or bushing, c,
supported in the conical eccentric, B, the sight stud, f, mounted in the sleeve, and a
combined spring and pawl, i, having one end fixed in the sleeve, and the opposite end
hooked and adapted to engage the notches in the elevating nut, as specified.
6. In a sight for firearms having a folding sight stud hinged above the elevating
nut, the combination of the main lower part of the stud, f, having
a slot in its upper
end and an axial perforation joining the slot; an upper or sight portion provided
with a tongue, k, fitting the slot and hinged to the stud, and the spring actuated
Tshaped piece, h, having its stem guided in the stud, and provided on its upper
surface with a stop for limiting the motion of the sight picce, substantially in the
manner and for the purpose specified.
Dated this 1st day of December 1887
ALLISON BROS.,
Agents for the Applicant.