Matches 1 - 50 out of 96 1 2 >
Match Document Document Title
7503434 Inputting or adjusting reference positions in a door controller  
A door controller and a method for inputting or adjusting one or more reference positions into the door controller have the controller connected to a door drive for moving a door and utilize a...
7183533 Optical multi-axis optoelectronic sensor  
An optical multi-axis optoelectronic sensor, in which a phototransmitting sensor head having a plurality of phototransmitters arranged thereon and a photoreceiving sensor head having a plurality of...
7156210 Freight elevator landing door control  
A control system for a motorized freight elevator landing door in which all of the doors in a single line of a hoistway are controlled with one set of proximity sensors carried on the elevator car....
7140470 Safety system for monitoring the state of elevator landing doors  
To render the elevator landing doors fitted with an elevator control unit ( 5 ) safe, this system comprises: elevator landing door surveillance units ( 10 ), installed on each elevator landing...
6945363 Method of contactlessly monitoring elevator shaft doors  
A method for monitoring shaft doors of a elevator installation uses at least one contactlessly acting shaft door monitoring sensor to emit a beam of electromagnetic waves, wherein at least during...
6739432 Inspection opening in an elevator car  
An elevator car is of a construction which facilitates inspection and maintenance function while enhancing passenger safety. The car includes a closeable inspection and maintenance opening in a...
6626268 Elevator door opening and closing device and opening and closing control method  
In an opening and closing apparatus for an elevator door, a light-emitter and a light-detector are disposed in safety shoes disposed on doorstop edges of each of two abutting elevator doors. The...
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...
6547042 Gap scanning  
A method of gap scanning wherein a first working member (such as a door) in conjunction with a second working member (such as a door) in conjunction with a second working member (such as another...
6534731 Safety edge switch  
Safety edge switch ( 1 ) for power-driven equipment or power-driven doors, sliding equipment and so forth of vehicles, with a hollow profile made of an elastomeric material and having a mounting...
6443265 Safety device of the elevator door  
A safety device for an elevator door characterized by the following facts: a lever ( 2 ) with one end ( 3 ) pivoted at an elevator door safety shoe ( 1 ) has its other end ( 4 ) fixed and supported...
6386326 Method and system for detecting objects in a detection zone using modulated means  
A system and an associated method of detecting an object in a three-dimensional field adjacent to a doorway, such as an elevator doorway, uses an array of energy emitters that emit...
6339375 Image monitoring apparatus and image monitoring method  
An image monitoring apparatus for detecting a confined passenger in an elevator just from an image, without using a dedicated sensor. The image monitoring apparatus includes an image acquirer for...
6247558 Apparatus for reducing power consumption in a elevator door protection system  
A elevator door protection system, having an infrared curtain comprising pairs of infrared transmitters and receivers and circuitry responsive to an output of the receiver due to interception for...
6202797 Automatic protection of elevator mechanics  
A portable device worn by an elevator mechanic when in the pit of the hoistway or on top of a car will activate sensors disposed on the car so as to cause an emergency stop and warn the mechanic of...
6167991 Method and apparatus for detecting position of an elevator door  
A method and apparatus for detecting the distance between opposing sides of an elevator door system is presented. The invention enhances the ability of an elevator door safety system to...
6051829 Safety detection system for sliding doors  
A safety system for detecting an obstruction approaching closing doors includes a transmitter stack and a detector stack. Each transmitter stack includes a plurality of transmitter...
5925858 Safety system for detecting small objects approaching closing doors  
A safety system for detecting small objects that approach closing doors comprising a transmitter stack, a detector stack, and a controller including instructions to detect small objects as the...
5923005 Equipment for approach area monitoring for escalator and travelling walkways  
Equipment for monitoring an approach area of a moving belt apparatus (1), such as an escalator or a travelling walkway, and for controlling a drive for the belt includes light sensors (12) arranged...
5900598 Lift sensor  
An optical obstructing sensing system is described. Control signals are optically transmitted across the obstruction sensing area thereby obviating the need for a physical connection between the...
5896951 Optimization of magnetizing current in linear induction motors  
Magnetizing current generated in a linear induction motor driving elevator car doors in elevator systems is optimized. Magnetizing current level is set low for door operation modes requiring lower...
5712458 Door sensor beam  
An assembly for a no-contact power reversing system for an elevator car gate comprises a lost-motion linkage comprising inner and outer telescoping members, the inner member having an upper...
5698824 Lift installation with primary and secondary transmitter receiver means  
In a lift installation in which a multi-beam curtain (primary beam) extends across a lift car door opening, auxiliary transmitters direct secondary beams towards a detection zone in front of...
5696362 Weak beam detection  
An apparatus for detecting weak beams in an beam detection system includes a plurality of emitters for radiating beams of energy, a plurality of detectors for providing detector signals in response...
5655627 Elevator door restrictor  
An elevator is provided with a car, an inner door mounted to the car and outer doors mounted to floor openings which define floor zones. The inner door registers with the outer doors when the car...
5641951 Elevator door safety device  
An elevator door safety system includes hoistway side doors (2), (3) which open on both sides installed in the side of the hoistway in such a way that they can freely open and close, car side doors...
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...
5605429 Door safety system for storage phosphor cassette autoloader  
In an apparatus for storing and automatically delivering cassette and/or pallets containing cassettes to a reader. The apparatus includes a plurality of cassette retaining sites. A door assembly is...
5569888 Ultrasonic elevator door safety system  
Ultrasonic waves may be emitted from a transmitter/receiver sonic transducer, or separate transmitter working with a separate receiver, directly or reflected into the opening between doors of an...
5420430 Detection systems for detecting obstructions in doorways  
A detection system includes an infrared emitter (2) and an infrared detector (8) having optical axes (6) and (12) extending parallel to one another but being offset from one another. As the...
5394961 Safety edge assembly for elevator doorways  
A safety edge assembly is provided for an electronic sensor system in an elevator doorway. A narrow elongated transmitter frame mounts appropriate electronic transmitting components of the system...
5250765 Apparatus for controlling elevator door  
An apparatus for controlling an elevator door comprises a motor for opening and closing an elevator door, an inverter unit for controlling the driving of the motor, a door position detecting unit...
5162711 Elevator door control responsive to obstructions  
An apparatus and a method for protecting against a person being caught in a closing automatic door provides constant force values up to the few last millimeters of a door closing movement. A...
5149921 Self correcting infrared intrusion detection system  
A self correcting infrared intrusion detection system primarily for elevator doors establishes multiple through-beams to intelligently detect passengers and adjust for environmental changes. Beam...
RE33668 Detection device having energy transmitters located at vertically spaced apart points along movable doors  
In the entranceway between an elevator car and a floor are two oppositely sliding doors. The approach of these doors is controlled by a detection system that senses the presence of objects between...
5001557 Method of, and apparatus for, controlling the position of an automatically operated door  
The automatically operated door is controlled in dependence upon the presence and movement conditions of one or more persons present on a support surface within a predeterminate space on a...
4984658 Car gate reversing edge  
The invention provides a scanning beam along the forward edge of an elevator car closure which leads the edge a predetermined distance to provide sufficient time when an object interrupts the beam...
4983896 System for driving and controlling an open-area shield  
A system for driving and controlling an open-area shield such as a window frame or door includes an open-area frame member having an opening; an open-area shielding member defining an open area...
4976337 Proximity detection systems  
An elevator car, supports a pair of sliding car doors which can be moved in synchronism towards or away from one another to close or open. An elongate detector strip is mounted on the outer face of...
4776433 Elevator door control system  
A feedback controlled elevator door control system 30 having motoring and generating modes, including a DC motor 35 connected to a DC power supply 36 via a power bridge circuit 68. Protective...
4753323 Safety system for closing doors  
A capacitive safety system for controlling a door, e.g. an elevator door, so as to automatically avoid obstacles, employs electronic control for antennas operating as capacitive measuring elements...
4742549 Procedure for watching over the area in front of a lift  
A procedure for watching over the area in front of a lift door, of said area being formed with the aid of one-dimensionally or two-dimensionally grouped photoelectric image point pick-ups, image...
4732238 Obstacle detection system for automatically controlled elevator doors  
Capacitively sensitive antennas are located at the closing edges of automatically controlled elevator doors to generate error signals by way of differential amplifiers if capacitively influenced by...
4706227 Acoustic obstruction detector and method  
Obstruction detector apparatus operatively coupled to an automatic electric door operator compares the time span of transmission and receipt of reflected echoes of ultrasonic energy within a door...
4693340 Bumper guide assembly for elevator doors  
This invention relates to a realignment assembly for use with a modern passenger elevator cab door for attachment to the opposed mechanically-actuated bumper switches that automatically reopen the...
4635032 Mobile door closure interrupting detector  
The present invention relates to an alarm device for doors in vehicles which is located in a hollow rubber tube and gives alarm as the tube is compressed. The device can be adjusted to be sensitive...
4621452 Powered sliding door safety system  
A sliding door having a safety light beam which travels with and ahead of a closing door. Interruption of the safety light beam by an object in the path of the closing door activates a door control...
4506765 Proximity detector circuitry especially for lift doors  
Proximity detector circuitry of particular value in controlling the operation of elevator car doors. Sensors are set in the edge of the door. The outputs of the sensors are fed to one or more...
4452009 Light barrier, particularly for automatically actuated lift cabin doors  
A light barrier is restricted to detecting blockage in a limited, constant region before the closing edges of a lift cabin-twin door. Two light emitters or transmitters are displaceably arranged in...
RE30719 Doorway safety device  
A safety system for automatically operated sliding panel doors, specifically elevator doors, having acoustic wave transmitters and receivers arranged in a row along the moving door's leading edge....
Matches 1 - 50 out of 96 1 2 >