Telephonic troubleshooting circuit for electric motor drives

Details Telephonic troubleshooting circuit for electric motor drives Telephonic troubleshooting circuit for electric motor drives

1975-03-03

1977-04-26

Olms, Douglas W.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

179175, 340207R, H04M 1100

Patent

active

040202879

ABSTRACT:
Electrical phenomena from electric motor drive circuitry is transmitted through telephone couplers, telephones, and telephone lines to provide signal data to a service technician remote from the circuitry for ascertaining the operative condition of the motor drive circuitry.

REFERENCES:
patent: 2810017 (1957-10-01), Tyszkiewicz
patent: 3217254 (1965-11-01), Hughes et al.
patent: 3266018 (1966-08-01), Higgins
patent: 3339193 (1967-08-01), Epstein
patent: 3376389 (1968-04-01), Fair
patent: 3400378 (1968-09-01), Smith et al.
patent: 3405234 (1968-10-01), West
patent: 3597546 (1971-08-01), Zehr
patent: 3824857 (1974-07-01), Smith

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