The Cheney Company

General Electric Company

John F Prendergast, Sr

Thomas J Green

Edward T Gisske

David R Voves

Marvin L Sivertsen

Arnold Lloyd Kelman

David A Gray

George R Lang

Edward P Stevens

Jerome H Adam

David W Wendt

Hyun Liu

Robert P Smith

John Sinchok

A control for an elevator system having a single hoistway and a single cab movable by a reversible motor vertically within the hoistway for servicing a plurality of floors. The control includes a call station located at each floor and having a hall call pushbutton, an arrival light and an in-use light, and a plurality of pushbuttons are located in the cab, with one being associated with each floor. A microprocessor is coupled to each of the hall call pushbuttons, in-use lights, arrival lights and cab pushbuttons and is programmed to respond to call signals for actuating a first switching circuit for energizing the motor for movement in a cab raising direction or a second switching circuit for energizing the motor for movement in a cab lowering direction in response to signals from the hall call pushbuttons or cab pushbuttons. The microprocessor is also programmed to determine the location of the cab and the required direction of cab movement, energize the switching circuit means to achieve the desired direction of cab movement and energize the appropriate arrival and in-use lights.

Apparatus and method for controlling an elevator

Stairway lift chair

A stairway wheelchair lift includes a stationary motor drive unit, a rail assembly extending along the stairway and a mobile platform movable along the rail. A flexible drive member, such as a chain or cable, within the rail assembly, is driven by the motor drive unit and is connected to the mobile platform to move the platform in either direction along the rail. The mobile platform is adapted to support and transport a wheelchair-bound passenger during use, and to fold upwardly out of the way of the stairway when the lift is not in use. An automatically actuated brake mechanism stops further movement of the mobile platform when the speed of the platform relative to the rail exceeds a predetermined threshold, and a plurality of safety sensing switches prevent operation of the lift in the presence of obstructions along the stairway or other unsafe conditions.

Stairway wheelchair lift

A stairway chairlift for transporting passengers in ascending and descending directions along a stairway includes a rail mounted adjacent one stairway wall and further includes a motorized chair unit movable along the rail. A seat, for carrying the passenger, is mounted to the top of the chair unit, and a swivel mechanism permits the seat to be rotated around a vertical axis to facilitate movement of the passenger onto and off of the seat. To minimize interference with ordinary use of the stairway, the seat is pivotally mounted to a horizontal plate which moves inwardly or outwardly in response to rotation of the seat so as to maintain a substantially constant clearance between the seat and the stairway wall. To further reduce interference with ordinary use of the stairway, the seat can be folded upwardly, as can be a foot rest mounted adjacent the lower end of the chair unit. A pair of arms, having inwardly curved end portions, can be lowered to form a retaining barrier around the seat as a passenger is being transported, and can be raised to permit the passenger to leave the seat after such transportation has been completed.

Stairway chairlift mechanism

A stairway wheelchair lift includes a stationary motor drive unit, a mobile platform movable along a stairway and a user interface for receiving user-generated input commands. The mobile platform communicates with the motor drive unit through a continuously maintained broadbeam infrared communications link, while the motor drive unit communicates with the mobile platform through an intermittently established short range infrared link. The user interface communicates with the motor drive through a hard wired four conductor communicates link. The use of infrared communications links, together with the four conductor hard wired link, reduces overall system wiring, enhances ease of installation and improves overall system flexibility and economy. Microprocessor based micro-controllers, within the motor drive unit, the mobile platform and the user interface, permit system operation to be tailored in accordance with the operating constraints and requirements imposed by a particular stairway configuration.

Electrical control system for stairway wheelchair lift

Medical diagnostic X-ray table assembly including an X-ray source and detector. The entire assembly is mounted on a cantilevered horizontal transverse pivot for being raised and lowered or tilted as a unit. The table assembly is mounted eccentrically to the horizontal transverse pivot so the table can clear the floor when tilted to the foot down position, yet the table is low enough to be mounted easily by a patient. The X-ray source and detector means are each supported by a series of superposed carriages driven by lead screw drives, thereby allowing the source and detector to independently translate transversely, longitudinally, and toward or away from the patient support. The X-ray source is also mounted on a transverse axis for being pivoted. A novel hydraulic mechanism is provided for tilting the table. The table is versatile, as it can be used for a wide range of radiographic and fluorographic studies and does not require wall mounted or ceiling mounted auxiliary equipment to perform chest X-rays and other procedures not possible with conventional freestanding X-ray tables.

X-ray table

A scintillation camera device has a suspension system for positioning a detector head attached to a suspended arm for imaging a portion of a patient. The suspended arm includes a linking member which is pivotally attached to the suspension system and which extends horizontal from the suspension system. A rigid member is pivotally attached to the linking member and provides horizontal articulation for the suspended arm. The rigid member has a yoke at the end thereof with the yoke having a base with ends adapted to pivotally retain the detector head. The rigid member has a generally arcuate shape which provides clearance for the patient whereby the rigid member can be extended over the patient and lowered for imaging a portion of the far side of the patient. The pivotal attachments of the linking member and the rigid member have releasable brakes to permit ready positioning of the detector head and subsequent locking of the head in that desired position.

Growing community of inventors

Franklin, WI, United States of America

John F Prendergast, Sr