Year: 1899

page_text: I, NICOLAS PIEPER, of 20, Rue des Bayards, Liége, Belgium, Manufacturer, do
hereby declare the nature of this invention to be as follows:-
This invention consists in a new system of lock mechanism, applicable. equally
to guns and also to carbines, revolvers and other fire arms.
The lock is composed of three principal parts, riz. a movable sear, a tumbler,
and a double armed spring.
The tumbler or hammer may be cocked either on the opening of the gun througli
the medium of a lever controlled by the fore end, or by the bolt-fastening.
In Figure 1 of the accompanying drawing the lock is represented uncocked.
On opening the gun, and turning the barrel, together with the fore end, about
the joint, the lever L, which pivoted about its axis L', is rocked and forces
back the tumililer e, which is cocked, whilst the spring R is at the same time
compressed.
The tumbler, in turning about its axis.e, draws, forward with it, the movable
sear G, in which is formed a bent or notch G¹, adapted to be engaged by a
hook B, formed in the breech body,, as shown in Figure 2
The lock having been thus cocked, it only requires a slight pressure underneath
the tail of the sear (by means of the trigger) to disengage the said sear from
the hook on the breech body, the spring then distends and impels the tumbler
forward against the striker by which the firing is effected. The sear is returned
by the, movement of the tumbler, to its original position.
According to my invention, a lock consists of a tumbler à double branched
spring, and a sear.connected with both the tumbler and the spring, which latter
acts bolli as a main or firing spring and a sear spring.
Dalad this 7th day of July 1900
1, NICOLAS PIEPER, of 20, Rue des Bayards, Liége, in the Empire of Germany,
Manufacturer, 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 consists in a new system of lock mechanism, applicable equally
to guns and also to carbines, revolvers and other fire arms.

page_text: The lock is composed of three principal parts, viz. a movable scar, a tumbler,
and a double armed spring.
The tumbler or hammer may be cocked either on the opening of the gun through
the medium of a lever controlled by the fore end, or by the bolt-fastening.
In Figure 1 of the drawing filed with the Provisional Specification the lock is
represented uncocked.
On opening the gun, and turning the barrel together with the fore end, about
the joint, the lever L, which is pivoted about its axis L', 'is rocked and forces
back the tumbler C, which is cocked, whilst the spring R is at the same time
compressed.
The tumbler, in turning about its axis C, draws forward with it, the movable
sear G, in which is formed a bent or notch G, adapted to be engaged by a
hook B, formed in the breech body, as shown in Figure 2.
The lock having been thus cocked, it only requires a slight pressure underneath
the tail of the sear (by means of the trigger) to disengage the said sear from
the hook on the breech body, the spring then distends and impels the tumbler
forward against the striker by which the firing is effected. The sear is returned,
by the movement of the tumbler, to its original position.
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:
A lock mechanism for small arms, comprising a tumbler, a double-brauched.
spring, and a sear connected with both the tumbler and the spring, which latter
acts both as a main or firing spring and a scar spring, substantially as above
described and represented in the annexed drawing.
CAZZO
Run mas
BERICH
ሰሰር
NICOLAS PIEPER.
By Henry Skerrett;
24, Temple Row, Birmingham. Agent for Applicant.