Title:
Multi-range hoist system
United States Patent 3078406


Inventors:
Zweifel, Charles H.
Rundel, Morton S.
Schaack, Robert Van C.
Application Number:
US61627456A
Publication Date:
02/19/1963
Filing Date:
10/16/1956
Assignee:
PACIFIC COAST ENGINEERING COMP
LOUIS ALLIS COMPANY
Primary Class:
Other Classes:
318/140
International Classes:
B66C13/24
View Patent Images:
US Patent References:
2777978Apparatus for regulating the number of revolutions of electric motors by means of ward-leonard control1957-01-15
2740078Current limit and inertia compensation apparatus1956-03-27
2722642Current limit motor control system1955-11-01
2663833Magnetic amplifier creeping speed control1953-12-22
2660699Variable voltage drive1953-11-24
2414357Antiplugging device1947-01-14
2260044Control system1941-10-21
2045485Control system1936-06-23
1955319Railway control system1934-04-17
1929745Motor controller1933-10-10
1733074Electric drive1929-10-22
1238516N/A1917-08-28
1233412N/A1917-07-17
1190924N/A1916-07-11