Patent GB-190521599-A (GB)
Title: Recoil Operated Fire Arms.
Inventor: CONDIT WILLIAM DAVIDSON
Filed: 1905-10-24
Granted: 1906-04-05
Abstract: 21,599. Condit, W. D., and Searle, E. H. Oct. 24. Breech-actions ; sliding barrel and breech-block; magazines.-Figs. 2 and 3 are vertical sections of an automatic small-arm with the parts in the firing and loading positions, respectively. The barrel 5, receiver 6, and breech-block 7 recoil together for a short distance, at the end of which the breechblock is disengaged from the receiver and continues its movement against the action of the return spring 30. The receiver 6, shown in Fig. 8, is fitted to the frame by a front projection 13 and rear projection 14, which have tongue-and-groove connexions 15, 16 with the walls of a guideway 17<a> on the frame extension 17, shown in plan in Fig. 7, and the sides of the action recess. The vertically-sliding locking-bolt 26 is carried in the projection 14 of the receiver, and engages behind a shoulder 27 of the breech-block. The bolt 26 is drawn down towards the end of the barrel and receiver recoil by the rocker 28 entering a depression 29 in the frame. The barrel and receiver are removed from the frame by pushing them forward slightly beyond the normal position so as to disengage the connexions 15, 16. A spring detent 9, fitted in an opening 20 of the frame extension, prevents this forward motion until turned down about its fulcrum 21. After removal of the receiver, the detent can be taken out by turning it up about its fulcrum 21. The breech-block is connected to the frame by tongue-and-groove connexions 23, which are disengaged at the same time as those of the receiver. Perspective views of the action-case 46, hammer 44, trigger 8, sear 45, and push-rod 47 are shown in Figs. 21, 22, 23, 24, and 25 respectively. The hammer 44 is pivoted at 44<b> and is provided with a projection 44<a>, which is engaged by the projection 14 of the recoiling receiver so as to cock the hammer. The barrel and receiver are locked against rearward movement before firing by a nose 8<a> on the trigger 8 engaging behind a shoulder 8<b> on the barrel. The trigger can be removed by swinging it upwards after the barrel and receiver have been removed. The sear 45 pivoted at 45<a> engages in the bent 45<c> of the hammer and is released by the trigger moving the push-rod 47 to the rear so as to bring a projection 50 on the rod against an arm 45<c> of the sear 45. The sear 45 is pushed into the bent by a spring bearing against the rear face of the arm 45<b>. The push-rod 47 is lifted up against its spring 51, so as to leave the sear free to re-engage the hammer, by a lateral projection 53 engaging in a groove 52, Fig. 8, of the recoiling receiver. The arm may be arranged to continue firing, so long as the trigger is held, by pushing in the pivoted lever 56, Fig. 28, and turning a fly 55, which is loosely mounted on the hammer trunnion, so as to bring the arm 55<a> under the rod 47 and the lower part of the fly over the arm 45d of the sear 45. The rod 47 then depresses the fly to release the sear by striking the arm 55<a> of the fly each time the rod 47 is lowered as the receiver returns to its normal position. The safety-slide 10, Fig. 27, in its forward position is directly beneath the sear. When the hammer is down, the sear is depressed and the slide 10 cannot be moved forward, so that the position of the hammer is indicated by the slide. The slide 10 is retained in the arm by the groove 54 engaging with the projection 46d of the action-case. The trigger 8 is locked when the last cartridge has left the magazine by the follower disengaging the locking- dog 42, shown in Fig. 26, from its engagement by its notch 42<d> with the magazine casing so that the locking-dog 42 is forced down behind a horn 43 on the trigger 8 by a spring bearing on the cylindrical part 42<c>. The locking-dog is pushed up again by the insertion of a new case, the empty case being ejected by the spring of the locking-dog when the detent 11 is pressed in. The breech-block is provided with a recess 36 in its underside into which the uppermost cartridge enters when the breechblock is in the closed position, so that in inserting a charged magazine casing it is not necessary to compress the spring further. The firing-pin 33 is retained in the breech-block by the return-spring 30. The cartridge-case extractor 7<a>, Fig. 36, is pivoted by means of a cylindrical boss 7b bearing in a cylindrical seat engaging more than a semicircumference of the boss. The extractor is removed by swinging it outwards and moving it downwards.