Chemistry: electrical and wave energy – Processes and products – Vacuum arc discharge coating
Patent
1976-07-26
1978-04-25
Kaplan, G. L.
Chemistry: electrical and wave energy
Processes and products
Vacuum arc discharge coating
73 88R, 73150R, 204228, G01L 100
Patent
active
040861546
ABSTRACT:
Apparatus for determining the internal stress within electrodeposited metals is disclosed. The apparatus includes an improved spiral contractometer wherein the spiral substrate is coupled directly to a dial indicator without the use of a gear system. A rod, passing between the dial indicator and the lower end of the spiral substrate, causes a dial indication for changes in the radius of curvature of the spiral substrate. To determine the internal stress that is created within metal electrodeposited from a particular electrolytic plating solution, the spiral contractometer is submersed in that plating solution and connected as the cathode of a galvanic cell. An anode, consisting of the type of metal being electrodeposited, is supported in a precise position relative to the spiral substrate and a constant current is supplied between the anode and the spiral contractometer for a precise period of time to electrodeposit a controlled amount of metal on the spiral substrate. At the conclusion of the electrodeposition period, the deflection of the spiral contractometer is read on a vernier readout of the dial indicator and referenced to a calibration curve or multiplied by a known factor to provide the internal stress of the electrodeposited metal. Because the improved spiral contractometer is relatively free of frictional forces that change with time and a controlled amount of metal is deposited on the spiral substrate, the contractometer need not be calibrated prior to each use but is generally calibrated only when it is necessary to replace the spiral substrate.
REFERENCES:
patent: 2568713 (1951-09-01), Brenner
patent: 2829517 (1958-04-01), Kushner
patent: 3356597 (1967-12-01), Schmidt
patent: 3437568 (1969-04-01), Hasselmann et al.
F. B. Koch et al., Plating & Surface Finishing, vol. 63, No. 1, pp. 46-51, (1976).
Kaplan G. L.
The Boeing Company
LandOfFree
Apparatus for determining stress in an electrodeposit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for determining stress in an electrodeposit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for determining stress in an electrodeposit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2419759