Title:
Automatic stairway elevator
United States Patent 2824623


Inventors:
Nord, Eric T.
Samuel, Rosen
Application Number:
US44714954A
Publication Date:
02/25/1958
Filing Date:
08/02/1954
Assignee:
U S AUTOMATIC CORP
Primary Class:
Other Classes:
192/17C, 192/144, 318/267, 318/446, 318/484, 318/742, 477/208
International Classes:
B66B9/08
View Patent Images:
US Patent References:
2619196Elevator for invalids1952-11-25
2610268Sensitive door edge device1952-09-09
2527897Single column elevator device1950-10-31
2466989Clutch and brake control mechanism for centrifugal machines1949-04-12
2447280Trawling winch1948-08-17
2400586Radial pressure clutch1946-05-21
2328817Self-energizing brake unit1943-09-07
2270735Screw and nut gearing1942-01-20
2227111Ball bearing screw jack1940-12-31
2212388Elevator1940-08-20
2207544Stair elevator1940-07-09
2114242Brake control for winches1938-04-12
2042937Power system for elevators and the like1936-06-02
1618644Centrifugal clutch1927-02-22
1511055Circuit closer for car doorways1924-10-07
1161255N/A1915-11-23
0446621N/A1891-02-17
Foreign References:
GB190701094A1907-05-23