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8463462 Systems and methods for braking system testing  
Systems and methods are provided that may he useful for testing braking systems for use in, for example, an aircraft. A system is disclosed that allows for built in testing. For example, a method...
7753176 Emergency stop system of elevator  
In an emergency stop system for an elevator, a governor sheave that moves in synchronism with the raising and lowering of a car is wound around a governor sheave. The car is mounted with a safety...
6863160 Service barrier  
A service barrier for elevator equipment and a method for deploying the same, said barrier comprising a floor plate and a plurality of leaves hinged along vertical axes, said floor plate pivotally...
6625934 Method for monitoring environmental conditions in restricted spaces  
An environmental detection system is particularly suited for elevator hoistways and other locations where access is difficult or restricted. The inventive system comprises a fire rated access cage...
6550585 Hoistway intrusion detection  
Elevator, exhibiting an elevator shaft (34) and a car (32) which is movably provided inside the elevator shaft (34), and a safety installation (2), which is designed in such a way that it can take...
6382362 Optical monitoring system for hoistway door interlocks  
A system for monitoring an elevator door in a hoistway. The elevator door is movable between a closed position and an open position. The system includes a transmitter for emitting an optical...
6050369 Elevator shaftway intrusion device using optical imaging processing  
There is provided an elevator shaftway intrusion detector which utilizes an image detector including a camera for generating a detection field within a zone of detection including the elevator...
5950767 Optical door lock  
A safety chain of an elevator system utilizes optical fiber to verify mechanical locking of elevator doors. The elevator doors have locks which incorporate the optical fiber to determine if each...
5644111 Elevator hatch door monitoring system  
An elevator door monitoring system determines if any hatch door at any floor along an elevator shaft or any other door leading to the shaft is opened while an elevator cab is away from the door....
5636714 Bi-parting elevator door actuator apparatus  
A bi-parting elevator door actuator apparatus operably connected to a bi-parting door assembly having 1) a door interlock and power control assembly; 2) a bi-fold door actuator assembly; and 3) an...
5616895 Door safety circuit for monitoring of story doors in lift installations  
A door safety circuit for monitoring of story doors in lift installations. The door safety circuit includes a transmitter that produces a non-electrical signal which is guided by a series of...
5610374 Safety string polling system  
A method of and apparatus for detecting the operative status of each of a series of remote stations connected to a main control in an elevator system includes a step or apparatus for causing the...
5507365 Universal lock for a positive safety door, in particular a landing entrance for elevator apparatuses  
The lock is of the type comprising: a housing that can be fastened to the door frame of the landing entrance, a locking bolt for the landing entrance, a bolt-control lever, an exterior...
5487448 Device for monitoring a control unit  
The invention relates to a monitoring device for a control unit having a ety chain. In accordance with the invention, the monitoring device has a testable switching device which is provided with...
5482142 Quiet elevator rotary gate switch  
An elevator rotary gate switch has a camming surface which is always in contact with a lead of an electrical circuit during operation. The camming surface has an electrical contact or bridge...
5476157 Elevator control system with elevator hoistway operation monitoring system and method  
An elevator control system (40) for automatically controlling the operation of an elevator car (22A) having a car door (24A) in which the elevator moves between different floor levels of an...
5373915 Passenger lift with an electric safety interlock  
A passenger lift incorporates an electronic safety interlock to prevent all movement of the lift, until a restraining belt is fastened. In some embodiments, the interlock is a normally open...
5321216 Restraining elevator car motion while the doors are open  
The invention is directed to a safety circuit which detects when the car is at least a predetermined distance away from a floor landing while a car door is open. The safety circuit, upon detection...
5183979 Elevator governor rope restraint when elevator car moves with car doors open  
The governor rope on an elevator is provided with an auxiliary brake which is a fail-safe brake and which operates to stop movement of the governor rope when the elevator car moves away from a...
5159162 Elevator leveling control device  
An elevator control device includes an operation control device for controlling the speed of a car by a regular-speed command when the car is in a normal operation, and the operation control...
5107964 Separate elevator door chain  
Elevator door chain contacts are isolated from the safety chain in a separate circuit, thus enabling the use of a separate door chain coil for independently checking the status of the door chain...
5074385 Call registration apparatus in an elevator system  
A call registration apparatus for an elevator system includes a call registration lamp and a car call button disposed in an elevator car and connected by a common signal line to a CPU. When the...
5063337 Electric motor regulation to obtain desired speed curve  
Regulation of the speed of an electric motor is accomplished by counting the number of periods of AC current and modulating the pulses supplied to the motor. The speed of the motor is regulated...
5014825 Rescue operating apparatus for elevator  
A rescue operating apparatus for an elevator has a device for transmitting a cage door open/close command from an elevator supervising section which receives notice regarding the trouble of the...
4785914 Elevator system leveling safeguard control and method  
An elevator control system with a local area network on the traveling cable and distributed control circuit safeguard for loss of remote microprocessor control with a car door open when floor...
4483420 Elevator door interlocking apparatus  
An elevator hatchway door interlocking mechanism. The interlocking mechanism includes a first latch member movably mounted in a housing in the elevator hatchway which engages with a second latch...
4376971 System for protection against getting caught in automatically operable doors or windows, particularly of vehicles  
A system for protection against getting caught in automatically operable doors or windows, particularly of vehicles. Specific intervals of time within which the closing or opening door should...
4367810 Elevator car and door motion interlocks  
An elevator includes a microprocessor-based cab controller mounted on the elevator car to monitor calls for service by passengers in the car, controls the opening and closing of the door, monitors...
4108281 Elevator door tampering protection system  
An automatic elevator system having car movement controls, door controls, a door operating mechanism for automatically opening and closing at least the car door and first switch contacts operable...
4101007 Control system for limiting elevator car movement speed unless car doors are fully closed  
Safety controls for an elevator car in which a switch which is closed when the elevator car door is at least partly open is connected to a relay which interrupts the power to the motor of the car...
4009767 Magnetically actuated locking system for elevator doors  
This invention relates to a device for use in elevators for the unlocking and locking of closed doors, gates, bars or wickets. The device comprises a mechanical locking means arranged at the door,...
3989123 Vandal proof interlock switch  
A conventional elevator system includes an elevator shaft, an elevator cab and means for moving the elevator cab along the shaft. The elevator cab has a sliding cab door to provide access thereto...
3967701 Multi-column lifting apparatus and synchronization control device for same  
A lifting apparatus of the type having a number of columns supporting a load platform each column driven by an electrical, polyphase current motor whereby sensors on each column, for example...
3882969 Safety system for controlling the start-up of elevators  
A safety system for controlling the start-up of elevators is described for the prevention of the fatal accidents which have recently been occurring due to the lack of care by the personnel...
3677370 ELEVATOR ALARM SYSTEM  
An alarm system is connected to conventional elevator control apparatus. If the inside elevator doors are opened between floors, the conventional switch responsive to such opening will actuate...
3625312 SAFETY APPARATUS FOR LANDING GATES ON HOIST ELEVATORS  
A hoist control system having electrical control circuits for each landing gate, and contact breakers in the control circuits in sealed containers mounted on the hoist adjacent each landing gate,...
3587785 ELEVATOR CONTROL SYSTEM SAFETY ARRANGEMENT  
3554326 ELEVATOR DOOR CONTROL  
An elevator control continuously moves a car door through an opening and closing operation, without pausing at a full open position, and moves the car door at substantially different speeds to...
3376486 Speed-controlled servo-positioner  
1,098,617. Automatic speed control. WESTINGHOUSE ELECTRIC CORPORATION. June 29, 1965 [July 22, 1964], No.27521/65. Heading G3R. [Also in Division E2] In a door-operating mechanism in which the...
3337070 Loading and unloading apparatus for dumb waiters and the like  
1,032,550. Unloading lift-cars. GUILBERT Inc. March 26, 1965 [Aug. 24, 1964], No. 12990/65. Heading B8E. A vehicle V is moved out of a lift car 17 by a coupling finger 74 mounted on an impeller...
3332516 Door locking system for lockless lift-shaft doors  
3315767 Sliding elevator and hatchway door operator  
3292737 Electro-mechanical interlock  
3277979 Door locking mechanism  
3239030 Elevator door lock and control  
3200905 Elevator door interlock  
3056470 Control system for elevators  
3054475 Safety device for an elevator door  
3033317 Mechanism for operating an elevator hatch door and interlock  
2989148 Elevator control  

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