Abstract: The operating process is based on the existance and cooperation of at least six functional units (64, 65, 66, 67, 68, 70), whereby the functional units (65, 66, 67) have a monitoring and control function. Functional units (64, 68, 70) together form the pause and frequency control circuit. Functional unit (65) monitors demagnetization of the transformer (2), functional unit (66) controls the time-averaged output current and functional unit (67) controls the output voltage of the switching controller. Functional unit (64) forms the voltage time-integral of the input voltage and functional unit (68) determines the target value of this voltage time-integral according to the pause duration determined. The process can be extended to monitoring the input voltage for the overshooting of a maximum value by a functional unit (71) and for under-shooting of a minimum value by a functional unit (72).

Abstract: A folding knife has a handle with a body forming a pocket into which its blade is normally retracted, the pocket being bounded by two cheeks of the holder body traversed by respective contacts in line with a hole near an end of the blade. One cutout is occupied by a plunger which is rigidly connected with a detent, occupying the other cutout by a stem that is integral with either the plunger or the detent and traverses the hole of the blade to serve as its pivotal axle. A spring in the first cutout biases the interconnected plunger and detent into a locking position in which a projection on the detent engages in a notch of the blade to hold it in its retracted or its extended position; the biasing spring may bear directly on a confronting blade surface and coact with one of its notches to prevent a rapid switch into the extended position.

Abstract: An inner tube seat is described for attachment to an inflated inner tube for the purpose of supporting a user above a water surface while enabling him to use his feet and legs for propulsion. The seat is comprised of a semi-rigid elongated seat member formed with integral arcuate ends that conform to the configuration of an inflated inner tube section. The seat member extends across the full diameter of the tube but does not span the entire central opening of the tube, thereby leaving a crescent shaped opening for access by the user's legs. The seat member also includes forward and rearward side edges. The forward side edge includes a smooth curved downwardly turned edge surface against which the user may rest his legs. The rearward side edge is arcuate to conform to that portion of the inner tube engaged thereby. Intermediate the ends is a section which is recessed and shaped to conform to the user's buttocks and upper legs.

Abstract: To reduce the caliber of a muzzle-loading handgun, an inner barrel is inserted into the normal, outer barrel to which it is positively fastened only at the muzzle end. The rear end of the inner barrel adjoins a nipple, screwed into the breech portion of the outer barrel, which has a rearwardly projecting boss adapted to carry a percussion cap lodged in a recess of a hammer when the latter is uncocked. The nipple has a bore offset from or inclined to the barrel axis to reduce the reaction of the explosive charge upon the hammer when the percussion cap is detonated. The inner barrel fits tightly into the outer barrel in the vicinity of the nipple but is of reduced diameter over the greater part of its length for easier insertion.

Abstract: A revolver-type pistol has a cylinder formed of a front section rotatably mounted on the pistol frame and a removable rear section formed with a plurality of throughgoing chambers each adapted to receive a respective cartridge. This rear section can be removed from the front section with the spent cartridges and replaced by another section so as to allow quick reloading of the pistol. A coupling is provided between the two sections to rotationally link them together and a spring-loaded mechanism is provided to hold the rear section tightly against the front section. The chambers in the rear section may terminate at the front face of the rear section in small holes alignable with similar holes in the front section so that the blank cartridges exploded in the rear section will discharge through these holes. The front section may have a rearwardly extending stem formed with teeth operated by the mechanism of the pistol to rotate the cylinder.