|
US2814027A
|
|
Elevator call measuring apparatus
|
|
US2811228A
|
|
Fly ball governor cable clamp
|
|
US2779438A
|
|
Car call cancellation means
|
|
US2791654A
|
|
Combined safe edge and sight guard for elevator doors
|
|
US2779439A
|
|
Automatic elevator current operated by-pass control
|
|
US2775312A
|
|
Up by-pass during down peak traffic condition
|
|
US2771160A
|
|
Means for distributing elevator service according to demand
|
|
US2758676A
|
|
Variable standing time control
|
|
US2759564A
|
|
Elevator dispatchers
|
|
US2746566A
|
|
Delay for directional preference control for parked elevator cars
|
|
US2750005A
|
|
Door hold button circuit
|
|
US2738489A
|
|
Auxiliary car button controls for automatic passenger elevators
|
|
US2688384A
|
|
Circuit means for distributing elevator service according to demand
|
|
US2728416A
|
|
Elevator control circuits
|
|
US2728417A
|
|
Means for providing preferred service for bypassed signals for a bank of elevators
|
|
US2691149A
|
|
Full interval timing on dispatch machine
|
|
US2685348A
|
|
Elevator control system
|
|
US2623110A
|
|
Means for balanced dispatching of odd and even numbers of elevator cars
|
|
US2652903A
|
|
Automatic elevator control
|
|
US2627321A
|
|
Hydraulic safety device for screw elevators
|
