IMPROVEMENTS IN AIR GUNS
Year: 1877

page_text: LETTERS PATENT to Frank Wirth, of the Firm of Wirth and Company,
Patent Solicitors, at Frankfort-on-the-Main, in the Empire of Germany, for the
Invention of "IMPROVEMENTS IN AIR GUNS." A communication from Michael
Weber, Manufacturer of Surgical Instruments, of Zurich (Switzerland).
Sealed the 28th February 1878, and dated the 5th September 1877.
PROVISIONAL SPECIFICATION left by the said Frank Wirth at the Office of
the Commissioners of Patents on the 5th September 1877.
FRANK WIRTH, of the Firm of Wirth and Company, Patent Solicitors, at Frank-
fort-on-the-Main, in the Empire of Germany. "IMPROVEMENTS IN AIR GUNS."
[A communication from Michael Weber, Manufacturer of Surgical Instruments, of
Zurich (Switzerland).]
An air gun constructed according to this Invention comprises a barrel or tube, a
case with trigger guard and trigger, and a stock; in this stock is placed a tube or
cylinder which encloses a movable but air-tight piston, and a spiral spring. The
said cylinder is connected with the barrel by a frame; in the said frame is placed
a movable tube provided with teeth on its lower side; this tube carries the air from
the cylinder to the barrel; a lever is provided, formed at its upper end like the
segment of a toothed wheel, and the teeth thereof take into the teeth of the said
movable tube, the lower end of the said lever being the trigger guard. A piece of
metal is attached to the frame which connects the stock with the cylinder and frame
by means of two screws. To this piece a common trigger with regulating screw is
attached, or a so-called hair trigger.
If the trigger guard is pressed downward, the moveable toothed tube will be
pushed backward and in the cylinder, carrying with it the piston until this latter
is caught by a lever catch provided for that purpose. As the moveable tube is
withdrawn from the barrel a shield above the said tube is pressed downward by a
spring, thus forming a guide for the insertion of any desired projectile,

page_text: When a projectile has been placed in the barrel the trigger guard is replaced in
its original position, thus effecting the advance of the moveable tube to its proper
place, and a perfectly air-tight junction is thus made between the barrel and
cylinder. If the trigger is now drawn the air in the cylinder will be instantly
compressed by means of the spring within the latter, causing the projectile placed
in the barrel to be discharged with considerable violence.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Frank Wirth in the Great Seal Patent Office on the 4th March
1878.
FRANK WIRTH, of the Firm of Wirth and Company, Patent Solicitors, at Frank-
fort-on-the-Maine, in the Empire of Germany. "IMPROVEMENTS IN AIR GUNS."
A communication from Michael Weber, Manufacturer of Surgical Instruments, of
Zurich (Switzerland).
This Invention relates to improvements in air guns as herein-after set forth, and
as illustrated in the accompanying Drawing, which is a longitudinal section of a
gun constructed according to the said Invention.
An air gun constructed according to this Invention comprises a barrel or tube a,
a case b, with trigger guard and trigger p, and a stock c; in this stock is placed
a tube or cylinder e, which encloses a movable but air-tight piston f, and a spiral
spring g. The said cylinder is connected with the barrel by a frame b; in this
frame b is placed a movable tube h, provided with teeth on its lower side; this tube
conducts the air from the cylinder e to the barrel a; is a lever formed at its upper
end, like the segment of a toothed wheel, and provided with teeth that take into
the teeth of the said movable tube h, the lower end of the said lever being the
trigger guard. A piece or bar of metal m is attached to the frame b, which con-
nects the stock with the cylinder e and frame b by means of two screws. To this
rail piece m I attach a common trigger with a regulating screw or a so-called hair
trigger.
If the trigger guard is pressed downwards the movable toothed tube h will be
pushed backward into the cylinder e, carrying with it the piston f, until the latter
is caught by the lever catch i. As the tube h is withdrawn from the barrel the
shield k above the said tube h is pressed downwards by a spring, thus forming a
guide for the insertion of any desired bullet or projectile. When a projectile has
been placed in the said barrel the trigger guard is replaced in its original position,
thus effecting the advance of the tube h to its proper place; a perfectly air-tight
junction is thus made between the said barrel and the cylinder e. If the trigger is
now pulled the air in the cylinder e will be instantly compressed by means of the
spring g causing the projectile placed in the barrel to be discharged with consider-
able force.
Having thus fully described the said Invention, and the manner of performing
the same, I wish it understood that I claim,―

page_text: forth.
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Second. The contrivance for pushing back the spring with the toothed tube and
lever, as above set forth.
Third. The arrangement or contrivance by which the barrel end is exposed for a
bullet or projectile by the bullet guide each time the gun is prepared for a discharge,
as above set forth.
In witness whereof, I, the said Frank Wirth, have hereunto set my hand
and seal, this Sixteenth day of February, in the year of our Lord One
thousand eight hundred and seventy-eight.
Tan 1TTP TITAMTY