Improvements in Repeating Fire-arms, more especially applicable to Revolvers.
Year: 1898

page_text: Date of Application, 3rd May, 1898-Accepted, 4th June, 1898
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COMPLETE SPECIFICATION.
Improvements in Repeating Fire-arms, more especially applicable
to Revolvers.
I, ALFRED LINES, of 17, Eyre Street, Chesterfield, in the County of Derby,
Engineering Student, do hereby declare the nature of this invention and in what
manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
This invention relates to improvements in repeating fire-arms, and has reference
to more particularly revolvers of the kind described in the specification of my
former British Letters Patent No. 1328 dated 18th January 1897, that is to say
those in which the trigger has a rectilinear motion parallel with the barrel.
An important feature of the present invention consists in arranging the firing
lever in such a manner that it is normally drawn back clear of the cylinder of the
revolver by a spring with which it is provided, the movement for firing being
imparted to it by the impact of a rebounding lever or tumbler actuated from the
trigger by a bell crank lever or other suitable means.
A further important feature of the invention is that the mechanism for rotating the
cylinder is so arranged as to bring it practically to rest in the firing position before
the movement of the trigger is completed. For this purpose the aforesaid bell crank
lever carries on its lower arm a pin engaging with a slotted lever pivoted
approximately at right angles to the position the said arm assumes when the
trigger is pulled. The consequence is that in the last part of the movement of the
trigger, the slot in the lever is almost tangential to the movement of the pin, and the
said lever, which is connected with the feed pawl of the cylinder remains at rest or
practically so.
In order that the invention may be clearly understood and readily carried into
effect I will proceed to describe the same fully by aid of the accompanying drawings
in which
Figure 1 is a sectional view partly in elevation showing the operative mechanism
of one construction of revolver embodying my present improvements.
Figure 2 is a similar view with certain parts removed, showing the remaining
parts in the position they assume when the trigger is pulled back.
Figure 3 is a part vertical section on the line x-x Figure 2 showing the feed
pawl and firing pin in elevation, looking from the barrel towards the breech.
Figure 4 is a part horizontal section on the line ¹ x Figure 2.
Figure 5 is a part horizontal section on the line x²x² Figure 2 showing the trigger
in plan.
Figure 6 is a part vertical section, showing in elevation, the three-armed lever or
tumbler herein before referred to.
Figure 7 is a part horizontal section showing in plan the bell crank lever on which
the trigger acts and the slotted lever which is actuated thereby and serves to opérate
the feed pawl.
A is the stock or butt of the revolver, B is the cartridge cylinder thereof, C is the
barrel, D is the trigger and E is the breech block.
All these parts are substantially similar to those in the revolver described in the
aforesaid specification.

page_text: a is the firing lever which is pivoted at a¹ and is acted upon by a V-shaped or
other suitable spring a which normally keeps it in the position shown in Figure 1
with its nose or firing pin a³ clear of the cylinder.
bis the three-armed lever or tumbler which is pivoted at b¹ and is acted on by
the spring 62, the arrangement being such that the upper end of the said tumbler is
normally in contact or nearly so with the lower end of the firing lever. 63 is a stop
which serves to take the pressure of the spring 62 off the lower arm of the tumbler
when the same is in the position just mentioned.
c is the bell crank lever which operates the said tumbler. One end c¹ of this lever
engages a projection or shoulder d on the trigger while the other end c² engages
the arm b' of the said tumbler. c³ is a spring which tends to keep the bell crank
lever in the position shown in Figure 1.
e is the pin on the lower arm of the bell crank lever, and f is the slotted lever
which is pivotted at fand has a slot or the like recess f² in which the said pin
engages. It will be seen that these levers are so arranged that, when the trigger
is pulled (Figure 2) they assume positions in which the lever is approximately at
right angles to the lower arm of the lever c and consequently tangential to the path
of the pin e.
g is the feed pawl which acts on ratchet teeth B on the cylinder B as described
in the former specification. This feed pawl is connected with and operated by the
slotted lever f, in consequence of which it completes its movement and brings the
cartridge to be fired into the proper position before the trigger has finished its
movement or the tumbler has been released to actuate the firing lever.
The operation of the foregoing parts is as follows:-
When the trigger D is drawn back from the position shown in Figure 1, the
tumbler bis, through the medium of the bell-crank lever c, turned on its pivot so
that its upper end moves to the left away from the firing lever, and the spring b² is
compressed by the lower end of the lever. While this is taking place the pin e is
depressing the slotted end of the lever f and is raising the feed pawl so as to rotate
the cylinder B and bring a fresh cartridge into position.
As the movement of the trigger continues the lever f becomes practically
tangential to the path of the pin e (see Figure 2) thus bringing the cylinder to rest,
whereupon the end c² of the lever c slips off the arm 64, and the tumbler b
immediately rebounds under the action of its spring 62 and strikes the lower end of
the firing lever a sharp blow. It will be seen however that at the actual
moment this striking takes place, the tumbler is impelled only by its kinetic
energy, as the action of the spring is arrested by the stop 63 in the manner before
referred to.
The upper end of the firing lever being thus driven forward, strikes the сар of
the cartridge after which the said lever immediately resumes its normal position
under the action of the spring a² with the upper end of the tumbler b resting
lightly against its lower end or in very close proximity thereto.
The advantage of the stop 63 for the spring will now be apparent, as if it were
not for this stop the spring b2 would be counteracting the spring a² and the firing
lever would not be able to resume its normal position.
The trigger when released moves outward under the action of the spring c³ and
the bell crank lever c. The lower end c² of this lever at the same time re-engages
the arm band the pin e throws upward the slotted end of the lever f which has the
effect of drawing downward the feed pawl g.
The parts are thus brought into their normal positions as shown in Figure 1 ready 5
for the firing of another shot.
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. A repeating fire arm in which the firing-lever is kept normally in its retracted 5

page_text: acting at the moment the said tumbler strikes the firing lever, suosu
for the purposes set forth.
2. In a repeating fire arm having a rotating cartridge cylinder, the means
substantially as described for bringing the said cylinder to rest or practically so
before the movement of the trigger has released the firing mechanism.
3. A revolver or like repeating fire-arm constructed and operating substantially
as hereinbefore described with reference to the accompanying drawings.
1908
Date HS C
HASELTINE, LAKE & Co.,
45. Southampton Buildings, London, W.C., Agents for the Applicant.