. The Bell System technical journal. Telecommunication; Electric engineering; Communication; Electronics; Science; Technology. 718 BELL SYSTEM TECHNICAL JOURNAL individually driven by the motor M belted to the reducing gear R which is attached to the main shaft S. The turntable D is given an intermittent motion by a Geneva gear and the turret head T has a vertical reciprocating motion from the cam C on the main shaft through the roller E. The cams F are used for operating a series of electrical contacts which work in synchronism with the other parts of the machine controlling the sequence of t
. The Bell System technical journal. Telecommunication; Electric engineering; Communication; Electronics; Science; Technology. 718 BELL SYSTEM TECHNICAL JOURNAL individually driven by the motor M belted to the reducing gear R which is attached to the main shaft S. The turntable D is given an intermittent motion by a Geneva gear and the turret head T has a vertical reciprocating motion from the cam C on the main shaft through the roller E. The cams F are used for operating a series of electrical contacts which work in synchronism with the other parts of the machine controlling the sequence of testing operations and the disposition of parts. The frame is built of welded structural steel. The turntable may be fitted with a variety of chucks or holding fixtures and the turret with various forms of gages or testing apparatus. The cams and gear ratios may be changed to accommodate a wide range of testing requirements. Space is provided at K for a hopper or other feeding device. This type of machine is suitable for multiple tests on parts requiring special holding fixtures. Multi-Unit Testing Machine—Semi-Automatic Feed An entirely different type of gaging and testing machine is shown in Figs. 10 and 11, which, as illustrated, is equipped for testing porcelain. Fig. 10 protector blocks used for protecting telephone apparatus against high voltage electrical currents or static discharges. These are porcelain blocks Ij in. x f in. x ^.j in., having a recessed. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original American Telephone and Telegraph Company. [Short Hills, N. J. , etc. , American Telephone and Telegraph Co. ]
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License: Licensed
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
