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
Mobile interactive kiosk method
System and method for detecting crop rows in an agricultural field
Prevention and treatment of oxidative stress disorders by gluthathione and phase II detoxification enzymes
Switchable solvents and methods of use thereof
Memory cell and memory cell array using the same
Image sensing apparatus and method of controlling the image sensing apparatus
Biphotonic photosensitizers, nanoparticles containing the same and their use as drugs
  Randomly Featured Patents
Fluid actuated impact tool with solid piston-standard bit arrangement and water seal
Partition and container
Vehicle window assembly
System and method for efficient packet replication
Treatment of diseases which cause pathological cornification of the epidermis of the skin
Hitch mountable vehicle protector
System and method for increasing provisionable bandwidth in time-division multiplexed communication links
Apparatus and method for manipulating images
Cigarette holder and filter insert therefor
Methods of forming integrated circuit devices having gate oxide layers with different thicknesses and integrated circuit devices formed thereby