Resources Contact Us Home
Digital data communication link for automatic machining system
T995005 Digital data communication link for automatic machining system
Patent Drawings:Drawing: T995005-2    Drawing: T995005-3    
« 1 »

(2 images)

Inventor: Merkel, et al.
Date Issued: June 3, 1980
Application: 05/967,967
Filed: December 11, 1978
Inventors: Merkel; Kenneth J. (Brookfield, WI)
Svitkovich; Louis T. (Milwaukee, WI)
Assignee: Kearney & Trecker Corporation (West Allis, WI)
Primary Examiner:
Assistant Examiner:
Attorney Or Agent:
U.S. Class: 340/518; 340/825.23
Field Of Search:
International Class: G05B 19/418
U.S Patent Documents:
Foreign Patent Documents:
Other References:

Abstract: A plurality of machine tools are linked together by a material handling system which carries workpieces from one machine tool to the next in line along a conveyor. The workpieces are clamped to pallets which are carried on conveyor carts between machine tools and which are shuttled onto the machine tools under the guidance of a material handling computer which controls all of the conveyor carts and pallets in the system. The limit switches which indicate the position of the carts and pallets are wired to the material handling computer over a novel data communication link which uses only two pairs of conductors for each machine tool and each section of the material handling system. A large number of limit switches can be handled by two pairs of conductors by generating an interrupt signal whenever a change occurs in the position of a cart or pallet and coupling the interrupt signal to the material handling computer over one pair of conductors while the other pair of conductors is used to sequentially interrogate all of the pertinent limit switches following receipt of the interrupt signal.
  Recently Added Patents
Wireless network device including a polarization and spatial diversity antenna system
Neurophysiological central auditory processing evaluation system and method
Methods and systems for aggregating and graphically representing information associated with a telecommunications circuit
Additives for oil recovery from reservoirs
Push to release cover for a portable electronic device
Anthranilic diamide compositions for propagle coating
Multiple secure elements in mobile electronic device with near field communication capability
  Randomly Featured Patents
Golf ball incorporating a polymer network comprising silicone
Method and apparatus for separating semiconductor elements, and mounting method of semiconductor elements
Nonlinear aromatic polyamide fiber or fiber assembly
Steam toe press
Waste food recycling machine
Articulator for mastering denture correcting technics
Network-based design systems and methods
Four-wheel-drive motor vehicle of transversely-disposed engine type
Inner sole structure
Red phosphorescent compounds and organic electroluminescent devices using the same