Abstract: A sequence camera for recording a series of images on a strip of photographic film employing a rotating shutter and an intermittant film advance mechanism. A motor drives the shutter and the film advance mechanism. The film advance mechanism utilizes a beater wheel with two protruding pins spaced unequally about the circumference and a spoke wheel with a plurality of spokes. As the motor drives the beater wheel, the pins intermittently engage the spokes of the spoke wheel, which, in turn, intermittently advances the film. The film is exposed by the shutter during the stationary period between advancements.

Abstract: Plasma spray coating of parts in a low-pressure chamber utilizes a linear induction motor drive system having gapped tracks for supporting and driving part carriers to flow in a continuous series of discrete steps through the low-pressure chamber where the parts are momentarily stopped for preheating and spray coating. Input and output air locks are sealed and unsealed by valve gates that move through the track gaps to optimize the sealing of the locks.

Abstract: An electrical plasma jet torch has front and back electrodes mounted in a torch body and means for maintaining a high current electric arc between the electrodes. The front electrode is the anode and is formed with a passage that provides a nozzle through which high velocity, high temperature plasma is ejected. The anode includes an improved arrangement of concentric rows of coolant passages extending to the front of the anode. A single annulus formed in the anode provides communication with all passages of the outer row. Passages of both rows are arranged in mutually spaced groups to provide space for a number of powder bores which extend substantially radially through the anode. The powder bores are enlarged to receive a sleeve which is readily replaced when eroded by highly abrasive powders. An annular grooved boss of the front of the anode is received in a groove in a cover plate and sealed thereto by means of O-rings to provide a coolant flow reversing annulus at the front end of the anode.