Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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.
Claim:
Description:
 
 
  Recently Added Patents
Upstream channel bonding in a cable communications system
High-order harmonic device of cavity filter
Method for determining the local position of at least one mobile radio communication device based on predetermined local positions of adjacent radio communication devices, associated radio com
Authoring method, authoring device and program
Multiplexing channels by a medium access controller
Method and system for monitoring service quality in a mobile node
Maltol ether processes and intermediates
  Randomly Featured Patents
Absorbent article
Method and apparatus for adapting and hosting legacy user interface controls
Compact optical random access memory having a refractive-reflector lens
ATP synthase subunits
Vaporizer features
High efficiency process for the recovery of the high pure sterols
Ta sputtering target and method for preparation thereof
Semiconductor contact silicide/nitride process with control for silicide thickness
Automatic hairpinlacing process
System and method for high throughput cell analysis and sorting