Abstract A pyrogen igniter assembly for use with a solid propellant rocket motor. The igniter assembly, which fits at, and within, the exit cone portion of the divergent type nozzle of the main rocket motor, comprises an igniter charge of the solid grain type bonded to a burst disc having a plurality of ports therein. The igniter charge has a centrally located port, at the end of which is positioned an electrically activated initiator embedded in a pyrotechnic charge. Upon application of current, the initiator ignites the pyrotechnic charge which, in turn, ignites the internal surface of the igniter charge. The resultant back flow of gases toward the burst disc ports ignite the outer surfaces of the igniter charge. The main propellant charge of the rocket motor is thus subjected to the hot combustion gas, the radiant energy, and the hot solid particles of the igniter charge and, therefore, ignites.
Inventors
👤 Paul A Heady Jr
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-03 13:57
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/95
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
218 words
An apparatus for igniting the main propellant charge of a solid propellant type rocket motor having a divergent-type nozzle, comprising: a. a burst disc having a plurality of ports therein, with said burst disc rupturable at a preselected pressure and affixed to, and wholly within, the exit portion of the divergent-type nozzle of the rocket motor; b. an igniter charge of the solid grain-type having a centrally located port, with said igniter charge bonded to the inner surface of said burst disc and located within the exit portion of the divergent-type nozzle of the rocket motor; c. an electric type igniter initiator having Leads attached thereto, said igniter initiator being located within the centrally located port of said igniter charge at the interface with said burst disc, and said leads passing through said burst disc and external to the exit portion of the divergent-type nozzle of the rocket motor; d. an igniter initiator charge of the pyrotechnic type surrounding said electric type igniter initiator, with said initiator charge located within the central port of said igniter charge; and e. means for activating said electric type igniter initator, by applying an electrical current through the leads thereto, thereby igniting said igniter initiator charge and said igniter charge, causing the ignition of said main propellant charge of the rocket motor.
Claim 2
Independent Claim
218 words
An apparatus for igniting the main propellant charge of a solid propellant type rocket motor having a divergent-type nozzle, comprising: a. a burst disc having a plurality of ports therein, with said burst disc rupturable at a preselected pressure and affixed to, and wholly within, the exit portion of the divergent-type nozzle of the rocket motor; b. an igniter charge of the solid grain-type having a centrally located port, with said igniter charge bonded to the inner surface of said burst disc and located within the exit portion of the divergent-type nozzle of the rocket motor; c. an electric type igniter initiator having Leads attached thereto, said igniter initiator being located within the centrally located port of said igniter charge at the interface with said burst disc, and said leads passing through said burst disc and external to the exit portion of the divergent-type nozzle of the rocket motor; d. an igniter initiator charge of the pyrotechnic type surrounding said electric type igniter initiator, with said initiator charge located within the central port of said igniter charge; and e. means for activating said electric type igniter initator, by applying an electrical current through the leads thereto, thereby igniting said igniter initiator charge and said igniter charge, causing the ignition of said main propellant charge of the rocket motor.