US2977951A - Gun - Google Patents

Description

GUN

Filed Jan; 28, 1959 gea-.earns QW/v rroeA/Eysl nited States ent GUN Y Secratus'H. Cavin,.445 S. Spring St., Los'Angeles 13, Calif.

Filed Jan. 28, VV1959, Ser. No. 789,627

`2 Claims. (Cl. 124-15) This invention relates to guns and more particularly to that type of. gun utilizing air pressure fora propelling force. Y

The invention is especially well suited for use when `embodied inthe form of a pistol or revolver, `andis adapted to provide a strong discharging force to a Vsmall pellet as fortarget shooting. Then, too, the features of.

the guns of this invention are such that they may advantageously be embodied in a toy gun, even one whichfis designed to shoot Ping-pong balls, for example.

It is ageneral object of this invention to provide ak gun of the above mentioned character which is simple and rugged in construction and reliablein operation. A gun of this invention requires but `relatively light cooking force with respect to the strong propellingforce which it is adaptedto produce. v Certain features of the. gun

4make it safe against being fredinadvertently.

Further objects and advantages of the inventionwill v. appear during the'cou-rse of the following part of this specification wherein thedetails of construction and mode of operation of Ya preferred embodiment are described with reference "to the accompanying drawing, in which:

Fig. 1 isa central longitudinal vertical section through a pistol, embodying this invention, and showing'the parts thereof in discharged position;

Fig;` 2 is another central longitudinal vertical section :tracting the piston.

A pin 47 extendsforwardly from the piston in alignment with the barrel bore.k It is long enough to extend into the barrel bore when `the parts of the gun are in discharge position, as shown in Fig. 1.of the drawing.

through the 'pistoland showing the parts in cocked -posin,

tion; and t A v f Fig. `3 is lafcross section Vtaken on line 3-'3 ofV Fig.:"2.

Referring to the drawing in greater detail, there is shown a gun of this invention in the form of a pistol It serves to unseat the pellet 44 from seat 43Y as the piston moves forwardly into the cylinder. e

A rod 49 which is screw-threaded at its inner end to extend into a tapped bore formed in the forward wall Aof the cylinder serves along with the gun barrel to hold the cylinder secure in the gun body. p

The piston is retracted by means of a hammer 51 which is pivotally mounted on a pivot pin 52 to swing rearwardly ina recess 53 formed in the ygun body. The hammer comprises a thumb-grip portion 54, a head vportion 55, a curved lever-arm portion 56 extending from the head portion to the lower portionof the hammer through which the pivot pin 52 extends, and a lever arm 57 extending upwardly from Vthe pivot pin. The upper "end ofthe lever arm 57 is forked to receive the rearward end portion 58 of the piston rod, there beingra pin 59 extending through the forked end of the lever arm` and through the piston rod to pivotally connect the rod to the hammer.

When the hammer isV released from its cocked position, it will swing forwardly until head por-V tion 55 strikes a stop or seat 60 defining the uppe-r.for Vward end of the body recess 53.

. The hammer is released from its cocked position by the action of' a` trigger 63v which extends out from a recess 64 formed in theY gunv body. The trigger has a lever arm 65 yextending rearwardly from theupper end thereof 'and terminating ina nger 66.* The trigger is pivotally mounted in'A recess 64 of the gunbody by means of apinl '67A which extends through thelever arm portion 65. A

having a body designated generally by reference numeral 10, the body of theillustrated embodiment being n formed of two khalf portions 11 and 12 which are fastened together as Ywith screws 13. A handle 14 is secured over the Vstock portion 15 of the body.

The half portions ofthe body have openings 18 formed therein for accommodating a cylinder 19. The cylinder has a forward wall`20 and a rearward end 21 in.abutment against a'wall 22 of the body openings. Cylinder Y 19 defines a cylindrical chamber 23 having a piston.

v'designated generally by numeralV 24, the piston being reciprocable axially in the chamber. l'he illustrated pis'A ton comprises a rearward plate 27 having a split lug v` trigger spring 68 is"secured at one end thereof to :that

part of the trigger disposed forwardly of the pivot pin 67, and it extends over the rearward portion of the trigger lever arm tol engage the top wall of the recess 64, thereby to bias the trigger to swing on its pivot in a trigger guard 69 in the direction of arrow 70.

The trigger is operatively associatedrwith the piston rod and the hammer by means of catch or plate 73 which is'slidable vertically in a recess 74 provided therefor in the gun body. The lower kend portion of the plate l l `73 has' an opening 75forrned therein and into which the finger 66 of the trigger extends so' that when theV trigger y. is'pulled backit will slide the plate upwardly against the pressure of the trigger spring, `and when the gun parts:

28 extending rearwardly therefrom for pivotal connection of the piston to a piston rod 29 as with a pivot pin 30. On the forward face of the plate 27 is aleather disc 31, the margins of whichl arefolded overthe edge Y of a disc 32 which is secured to the Vplate by a screw i l 33. A coil spring 35 in the chamber bears` at one endV thereof against the rearward face yof lthe piston plate landat its other end against the wall 22,: for'urging the piston forwardly/.in the cylinder. n

A` gun barrel 37 extends out'from the body, ithaving .a' bore 38 extending axiallyv therethrough from a muzzle end 39 to a breech end 4.0. The barrel issecured at n its, breechendl an opening 41formed in the forward wall 4of Vthejcyl'irrc'ler whereby( the bore is open to Vthe areA shifted toward. cocked positions, the trigger spring .will cause the .catch plate 73 to -slide downwardly inY its The upper end portion of the plate 73 has a longitu- -dinally'extending slot 77 formed therein,`thev slot terrninating at its upper end in an end wall 7S. There are recess 74.

openings 79 and 80V formed in the gun body allowing the piston rod to Aextend through V the slot 77 to the s hammer. r 1 A notch 83 is formed in the pistongrod'intermediate its ends at a place; where it will become' engaged by the -upper end wall 78 of the plate slot 77 when the hammer hasY been pulled backA to its 'cocked position, therebyto hold thesev'eral gun parts lin their respective cocked positions until released by apull on the` trigger.` y

,Y v Piatentevd Apr. 4, 1961 Y It will be apparent that will pull upon the piston rod to move the piston rearwardly in the cylinder thereby to suck the projectile 44 into its seat 43. The rearward end of the piston rod will be pulled downward by the swing of leverarm 57 of the hammer, thereby allowing ,the catch plate to be pulled downwardly by the force of the trigger spring. When `the hammer has pulled back to its cocked position, the

'the piston will drive the projectile out through the barrel.

as the hammer is retracted it While the instant invention has been shown and de- Y scribed herein, in what is conceived to be the most practical and preferred embodiment, it is recognized that departures may be made therefrom within the scope of the invention, which is therefore not to be limited to the details disclosed herein, but is to be accorded the full scope of the claims.

What I claim is: l

1. A gun comprising a body, a barrel extending out 'from the body and having a bore extending axially there- 4through, the bore having a muzzle end and a breech end, a cylinder of greater internal diameter than said bore in the body extending rearwardly from the breech end of the bore and having a forward wall to define a cylindrical chamber in the cylinder extending rearwardly'V from the forward wall, said cylinder having a longitudinal axis offset from the longitudinal axis of said bore, the forward wall having an opening formed therein, the

,barrel being connected to the forward wall whereby the breech end of the bore is open to the chamber, the breech end of the bore having an annular taper for frictionally holding a projectile in the breech end of the bore, a piston reciprocable axially in the chamber, a spring in the chamber and engaged behind the piston for urging the piston toward the forward wall, said body including la slot portion remote from said breech endof said barrel, and adapted to receive a'hammer, said hammer pivotally lmounted in said slot portion rearwardly of the cylinder,

a piston rod pivotally connected at one end thereof to the rear of said piston and pivotally connected at its other end to the hammer whereby as the hammer is moved rearwardly in said slot portion on its pivot toward a cocked position it will retract'the piston in the chamber and load the spring, the piston rod having a notch formed therein between its ends, a plate slidable transverse to the movement of said piston in the Vbody behind the chamber and forwardly of the hammer, the plate having an elongate opening formed thereinand through which the piston rod extends, the plate being slidable with respect to the piston rod from a position when the gun is cocked in which the plate engages the pistou rod in the notch thereof to another position in which the plate s disengaged from the piston rod, a trigger pivotally mounted on the body and pivotally engaged with the plate for operating the plate, a trigger spring operatively associated with the body and with the trigger for swinging the trigger forwardly on its pivot to move the plate into engagement with the notch on the piston rod and a pin mounted in said piston eccentrically and protruding from the forward face of said piston and extending forwardly from the piston and in alignment with the barrel bore,

,the pin being of a length to extend into the bore when the piston is moved forwardly in the cylinder to unseat said projectile from the annular taper in said breech, the force of the pin against the projectile and the air pressure developed in the chamber by the forward movement of the piston forceably ejecting the projectile out through the muzzle end of the bore.

2. A gun as delined in claim 1, wherein said hammer comprises avshort lever arm extending upwardly from the pivot connection of the hammer in the body, and a ycurved lever arm disposed rearwardly of the short lever arm and projecting from said body through said slot portion, andV said short lever arm being pivotally connected at one end of said piston rod.

References Cited in the tile of this patent UNITED STATES PATENTS 48,754 Whittelsey July 1l, 1865 1,063,072 Searle May 27, 1913 2,069,821 Douglas Feb. 9, 1937 2,151,676 Appleby Mar. 28, 1939 2,580,356 Martin Dec. 25, 1951 f2,708,430 Smith May 17, 1955

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