APPLIOATION FILED MAR. 24, 19. ??? ??? i F, F. KNOUS. REPEATING FIREARM, APPLICATION FILED MAR. 24, 1911. 998,347. Patented July 18, 1911. 4 SHEETS-SHEET 2. ------ Ih, EzzzzzzzzzzzzzzzzzzzzZzZzZzZzZzZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZzz F. F. KNOUS. REPEATING FIREARM, APPLICATION FILED HAR. 24, 1911. Patented July 18, 1911. 4 SHEETs-shBET 3. (6%) ZZZZZZZZZZZZZZZZZZ$$??—??Ø %%%%%%%%%%%%%%%%%%zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz F. F. KNOUs, REPEATING FIREARM, APPLICATION FILED MAR. 24, 1931. 998,347. ? Patented July 18, 1911. 4 SHEETS-SHEET 4. UNITED STATES ?ATENT OFFICE, SRANKLIN F. KNOUs, OF NEW HAVEN, CONNECTICUT, AssIGNos. To winCELESTER, REPEATING Aams COMPANY, OF NEW HAVEN, CONNECTICUT, A CORPORATION. BEPEATING FIBEARM. specification of Letters Patent. Patented July 18, 1911. Application filed Earch 24, 1911. Serial No. 616,734, lor all uphom, i? may concern: , - olan view of the bolt-cateh on the scale of 55 Be it known that II, FRANKIRJEN F. KNOUs, igs. 9 and 10. w a citizen of the United States, residing at Myinvention relates to an improvement New Haven, in the county of New Haven in self-loading, tubular magazine repeating 5 and State of Connecticut, have invented a shotguns, the object being to produce a sim new and useful Improvement in Repeating ple, compact, reliable and durable arm con 60 Firearms; and I do hereby declare the fol structed with particular reference to adapt lowing, when taken in connection with the ing it to be used as a single loader without accompanying drawings and the letters of the manual opening of the gun by the re 10 reference marked thereon, to be a full, clear, traction of R ? gun p? l and exact description of the same, and With these ends in view my invention 65 which said drawings constitute part of this consists in a firearm having certain details specification, and represent, in of construction and combinations of parts Figure 1 a view in side elevation of a self as will be hereinafter described and pointed 15 loading tubular magazine repeating shot out in the claims. gun constructed in accordance with my in In carrying out my invention as herein 70 vention. Fig. 2 a broken view of the gun shown, employ a rod-like or cylindrical in vertical longitudinal section, showing the bolt-catch 2 having its respective ends jour breech-bolt and barrel-extension in their naled in the side walls of the gun-frame or 20 rearward and open positions with the bolt receiver 3 near the rear end thereof, the said held at its forward end by the bolt-stop, but catch ?????? adapted to have endwise move 75 with the bolt-catch in readiness to take the ment in a lineat, a right angle to the longi place of the bolt-stop when the same is de tudinal axis of the gun, as well as to have pressed by the cam on the barrel-extension a very slight rocking or oscillating move 25 just as the same reaches the limit of its for ment upon its trunnion-like ends for the ward movement. Fig. 3 a corresponding purpose of raising and lowering its rear 80 view showing the barrel-extension moved wardly extending beveled nose 4 with re forward into its closed position and the . spect to a forwardly inclined notch 5 formed breech-bolt held in its rearward and open close to the rear end of the lower face of 30 position by the bolt-catch. Fig. 4 a broken the breech-bolt 6. For the purpose of auto view partly in vertical longitudinal section matically rocking the bolt-catch 2 upon its 85 and partly in side elevation, showing the longitudinal axis and for holding it at the gun-barrel, the forearm, the barrel-closing limits of its oscillating movement, I form spring and the buffer-spring, the springs in the lower face of its left hand end two 35 being shown compressed. Fig. 5 a view in parallel shallow semi-circular grooves 7 and vertical transverse section on the line a-a. 8 extending clear across it transversely, and 90 of Fig. 3, looking forward and showing the separated ??????# each other by angular cam bolt-catch holding the bolt, Fig. 6 a broken surfaces 9 and 10 joined by a diagonally ar view in vertical longitudinal section corre ranged rib 11 clearly shown in Fig. 11. 40 sponding to Figs. 2 and 3, but showing the These grooves 7 and 8 alternately receive barrel-extension and breech-bolt in their the upwardly inclined straight rear end of 95 forward and firing positions. Fig. 7 a view the upper arm 12 of a bent wire bolt-catch corresponding to Fig. 4. but showing the spring 13 arranged in a vertical plane in a barrel in its forward position into which it recess 14 in the inner face of the left hand 45 is moved by the barrel-closing spring. Fig. side wall of the gun-frame or receiver 3, the 8 a view invertical transverse section on the lower arm 15 of the said spring being bent 106) line 5-5 of Fig. 6, showing the bolt-catch downward at its extreme rear end and in in its bolt-releasing position. Fig. 9 a. serted into a hole 16 formed in a rib 17 broken view in vertical transverse section upon the inner face of the said left hand 50 on an enlarged scale, showing the bolt wall of the frame 3. The said upper armi catch in position to be engaged by the bolt. 12 of the spring 13, exerts a constant upward 105 Fig. 10 a corresponding view showing the pressure upon the bolt-catch 2 so that when bolt-catch in its retired position in which it the same is moved lengthwise, the said arm clears the bolt. Fig. 11 a detached reverse rides over the cam-surfaces 9 and 10 with the N . effect of exerting an effort to push the bolt the magazine 23 and placed against the for catch in one direction or the other is the case ward end of a buffer-spring 26 the rear end may be. In this way the said cams give a cer of which is abutted against a corresponding tain snappiness and quickness of movement to washer 27 also encircling the magazine 23 is the bolt-catch after the same has been ini and abutted against the forward face of the 70 tially started moving in one direction or -frame or receiver 3. It is to be particu the other for the shifting of the spring arly noted, that the spring 22 and sleeve arm 12 from the groove 7 to the groove 8 24 are constructed and proportioned in and vice versa, the said arm 12 being al length so that the rear end of the sleeve 24 10 ways located in one groove or the other for is engaged with the washer 25 to bring the 75 holding the catch in either one or the other buffer 26 into play, before the spring 22 of its two extreme positions except during has reached the limit of extreme compres the brief interval when it is riding over the sion. The parts just described are located cam-surfaces 9 and 10. The said grooves within a chambered forearm 28 from the 15 7 and 8 are located at the ends of the bot forward end of which the magazine projects, 80 toln wall of a transverse cut 44 formed in its forward end being furnished with an in the bolt-catch 2 the lengthwise movement t???: knurled operating shoulder 29. of which is limited by the engagement of uring the rearward movement of the the said arm 12 with the end walls 45 and breech-bolt 6, gun-barrel 20 and barrel-ex 20 46 of the said cut 44 as clearly seen in Figs. tension 21 as above described, the barrel 85 9 and 10. extension 21 is locked to the breech-bolt 6 Now in order to cause the bolt-catch dur by means of a locking-block 30 pivotally ing its lengthwise movement, to oscillate mounted in the breech-bolt and at this time just enough to raise and lower its nose 4 lifted into the locking-notch 31 in the barrel 25 for co-action with or clearance from the extension. Just before the bolt 6, barrel 20 90 breech-bolt 6, the grooves 7 and 8 are tilted and barrel-extension 21 reach the limit of or inclined with respect to each other at an their rearward excursion, the said locking angle sufficient to produce the required os block 30 is drawn downward out of the said cillating movement, the inner groove 8 be locking-notch 31 by means of the bolt push 30 ing higher at its forward end than the for rod 32 which is pivotally connected to the 95 Ward end of the outer groove 7. In other said pivotal locking-block 30 and extends Words, while the rear ends of the two grooves downward and outward through an inclined are in the same horizontal plane, the grooves opening 38 in the rear wall of the gun are tilted so that the forward end of the frame or receiver 3, the inclined upperface 35 inner groove is higher than the forward end of the said opening 33 acting as a cam to 00 of the outer groove. On account of its pro depress the rod 32, and hence draw the piv vision with the nose 4, the bolt-catch 2 must otal block 30 downward out of the locking be constructed so as to permit it to be as notch 31.