Model railway power supply

Details Model railway power supply Model railway power supply

1976-03-17

1977-12-13

Halvosa, George E. A.

Railways

Slotted conduit

Yokes

191 5, 246 34R, 307 2, 324 51, B60M 100

Patent

active

040622940

ABSTRACT:
A model railway or road vehicle installation in which vehicle-mounted electric drive motors are supplied through contact with track conductors, including a power supply providing an intrinsically safe a.c. component of such frequency and amplitude as to be capable of breaking down any contact inhibiting dielectric layer of dust, grease, metal oxide etc. on the track conductors, in addition to the normal d.c. component powering the vehicle. An automatic arrangement suppresses the a.c. component so long as good electrical contact is maintained so that the a.c. component is provided only when necessary. For facilitating slow speed operation, the d.c. supply is pulsed with a variable mark to space ratio dependent upon the desired vehicle speed thereby to maintain the torque output of the vehicle motor.

REFERENCES:
patent: 2150774 (1939-03-01), Ledwinka
patent: 2211181 (1940-08-01), Thompson
patent: 2528558 (1950-11-01), Sherman
patent: 2853957 (1958-09-01), Dean
patent: 2965044 (1960-12-01), Johnson
patent: 2985752 (1961-05-01), Fines
patent: 3214597 (1965-10-01), Jordan
patent: 3705387 (1972-12-01), Stern

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