Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Timer circuit arrangement in digital combustion control system










Image Number 2 for United States Patent #4299556.

A timer circuit arrangement for use with a digital combustion control system functions to check failure of a safety timer which stops the combustion operation in the event that ignition is not completed within a predetermined time. The arrangement has a simple circuit which checks the safety timer in advance of initiation thereof. A pre-purge timer, which determines a predetermined time for feeding only combustion air into the combustion chamber for purge thereof in advance of the combustion, and the safety timer are built with a unitary construction. A series connection of flip-flop circuits is provided for carrying out frequency division of clock pulses to obtain predetermined times, and the flip-flop circuits for the safety timer are constituted by at least a part of the flip-flop circuits for the pre-purge timer so that the pre-purge may continue infinitely when the safety timer become out of order, thereby preventing the operation for combustion and ensuring safety of operation.








 
 
  Recently Added Patents
High-density fiber optic modules and module housings and related equipment
LO generation with deskewed input oscillator signal
Method of patterning color conversion layer and method of manufacturing organic EL display using the patterning method
System and method for data reconfiguration in an optical communication network
Recovery of a hot-pluggable serial communication link
Semiconductor device and method for manufacturing the same
Weak acid recovery system for ethanol separation processes
  Randomly Featured Patents
Skin graft preparation apparatus
Lithographic linear motor, lithographic apparatus, and device manufacturing method
Cable shielding tape and cables incorporating such tape
Bingo card ink marker bottle
Interferometer for measuring optical phase differences
Blood collection container
Packaging systems for human recombinant adenovirus to be used in gene therapy
Method for fabrication of emitter of a transistor and related structure
Biocompatible polyurethanes by treatment with polyoxazoline block copolymers
Color information acquisition apparatus, color information acquisition method, and color information acquisition program product