Stable initiator compositions and igniters
First Claim
1. A reliable high sparking initiator composition comprising a. a mixture of i. a metal containing oxidizing agent ii. at least one metal reducing agent, and iii. a non-explosive binder b. wherein said mixture is characterized by release of a total amount of energy between the range of 0.25 J and 8.5 J upon actuation and a deflagration time between the range of 5 to 30 milliseconds at a composition thickness of between about 20 to 100 microns.
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Accused Products
Abstract
High sparking initiator compositions with a controlled amount of power are disclosed. The initiator compositions comprise a metal containing oxidizing agent, at least one metal reducing agent, and a non-explosive binder. Low voltage igniters that provide bidirectional plumes upon ignition are also disclosed. These igniters have a electrically resistive element positioned across a hole in a support which directs the plume. These igniters and compositions are useful in the actuation of solid fuel heating unit, in particular, sealed heating units.
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Citations
60 Claims
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1. A reliable high sparking initiator composition comprising
a. a mixture of i. a metal containing oxidizing agent ii. at least one metal reducing agent, and iii. a non-explosive binder b. wherein said mixture is characterized by release of a total amount of energy between the range of 0.25 J and 8.5 J upon actuation and a deflagration time between the range of 5 to 30 milliseconds at a composition thickness of between about 20 to 100 microns.
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22. The initiator composition of claim 22, wherein said optical actuation is a flashbulb.
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24. A reliable, high sparking, low voltage, non-explosive initiator composition comprising, based on total composition dry weight, about 26-27% aluminum, 51-52 percent molybdemun trioxide, 7-8 percent boron and 14-15% Viton.
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25. A reliable electrical igniter for igniting fuel and forming bidirectional focused plumes comprising:
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a. a support with a hole contained therein, b. at least two conductors in contact with the support, c. a resistive heating element positioned at least partially across the hole and attached to the conductors, and d. an initiator composition placed on at least a portion of both sides of the resistive heating element and covering the hole. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43)
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44. A method of making a reliable igniter that upon ignition has bidirectional focused plumes comprising the steps of:
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a. depositing two conductors on a support with an hole contained therein b. attaching a resistive heating element between the conductors and positioned across the hole c. dispensing a initiator composition on one side of the resistive heating element thereby covering at least a portion of the hole on the support d. drying the dispensed initiator composition;
e. dispensing a second time the initiator composition on the opposite side of the resistive heating element and in the hole from the first dispensing thereby covering the hole; and
f. drying the second dispensed initiator composition. - View Dependent Claims (45, 46, 47, 48, 49, 50, 53, 54, 55, 56, 57, 58, 59, 60)
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- 51. The method of claim 51, wherein said wire has a diameter of between about 0.0006 to about 0.001 inches.
Specification