Metal working – Method of mechanical manufacture – Repairing
Patent
1990-04-24
1990-11-27
Echols, P. W.
Metal working
Method of mechanical manufacture
Repairing
65 27, 65 29, B23P 600
Patent
active
049725661
ABSTRACT:
A glass container inspection machine includes a head assembly, a console, and a cable connecting the two. The head assembly includes a measuring oscillator and a reference oscillator the outputs of which are applied to a Phase Detector Multiplier. A fixed resistance in the output circuit of the measuring oscillator is selected so that the output of the Phase Detector Multiplier is the same no matter what the frequency of the oscillation. The oscillation and the Phase Detector Multiplier are part of a Phase Locked Loop, the amplifier portions of which are in the console. The machine is comprised of four such data channels, each of which includes a head assembly operating at a different oscillator frequency. All components that are frequency dependent are included in the head assembly while all components in the console are frequency independent. Thus the output of any of the head assemblies may be connected via the cable to any of the data channels of the console. The entire system may be spared with a single head assembly that operates at a frequency that is different from the other head assemblies.
REFERENCES:
patent: 4216523 (1980-08-01), Harford
patent: 4806503 (1989-02-01), Yoshida et al.
patent: 4830985 (1989-05-01), Araghi et al.
Andersen Robert P.
Scott Paul F.
Vozenilek Edward F.
Bryant David D.
Echols P. W.
Emhart Industries Inc.
Smith Spencer T.
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