Patent US3592181A successfully refreshed from Google Patents.
US3592181A
Expired / Lapsed
US
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Igniter for smudge pots
Assignee: Individual
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Filing: 1969-12-29
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Granted: 1971-07-13
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Expires: 1989-12-29
Abstract
Abstract An electrically controlled igniter assembly for lighting the fuel in an orchard heater or smudge pot. The assembly includes an igniter cartridge loaded with a large main pyrotechnic charge and with a small ignition charge fired by an electric heating element to ignite the main pyrotechnic charge. The assembly further includes a cartridge holder comprising an open ended tube adapted to be secured to a smudge pot and project into the fuel chamber thereof, and a connector for electrically connecting an igniter cartridge inserted into the holder tube to an emergizing and control circuit by means of which the heating element of the cartridge is energized.
Inventors
- 👤 Gerald J Rohwein
- 👤 Don P Van Dyke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:15
CPC Classifications
A; A01; A01G; A01G13/00; A01G13/06
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
135 words
An igniter cartridge for igniting the fuel in orchard smudge pots and the like, comprising longitudinally extending tube structure closed at its outer end and being adapted at its inner end to project into the fuel chamber of such smudge pot, said tube structure having a main pyrotechnic charge therein and having also an ignition charge adjacent said inner end for firing said main charge, an electric igniter element in thermal proximity with said ignition charge for energizing the same and having conductors leading to the exterior of said tube structure for connecting said igniter element with a control circuit, and an orifice plug carried by said tube structure adjacent the inner end thereof and having an orifice therethrough for directing the jet flame resulting from combustion of said main charge toward a selected location.
Claim 2
Dependent Claim
135 words
An igniter cartridge for igniting the fuel in orchard smudge pots and the like, comprising longitudinally extending tube structure closed at its outer end and being adapted at its inner end to project into the fuel chamber of such smudge pot, said tube structure having a main pyrotechnic charge therein and having also an ignition charge adjacent said inner end for firing said main charge, an electric igniter element in thermal proximity with said ignition charge for energizing the same and having conductors leading to the exterior of said tube structure for connecting said igniter element with a control circuit, and an orifice plug carried by said tube structure adjacent the inner end thereof and having an orifice therethrough for directing the jet flame resulting from combustion of said main charge toward a selected location.
Claim 3
Dependent Claim
24 words
The igniter cartridge of claim 1 and further comprising a burnout diaphragm extending across said orifice to close the interior of said tube structure.
Claim 4
Dependent Claim
51 words
The igniter cartridge of claim 1 in which said tube structure includes a pair of telescopically related inner and outer tubes, said inner tube at one end thereof defining the aforesaid closed outer end and said outer tube at one end thereof defining the aforesaid inner end carrying said orifice plug.
Claim 5
Dependent Claim
45 words
The igniter cartridge of claim 3 in which said igniter element is disposed at the interior end of said inner tube intermediate the ends of said outer tube, and further comprising a burnout diaphragm extending across said orifice to close the interior of said tubes.
Claim 6
Dependent Claim
35 words
The igniter cartridge of claim 4 in which said ignition charge is confined between said orifice plug and the interior end of said inner tube, and in which said conductors extend longitudinally intermediate said tubes.
Claim 7
Dependent Claim
38 words
An igniter cartridge of claim 5 wherein the pyrotechnic charge comprises (by weight): potassium nitrate 50%, sulfur 20%, aluminum powder 20%, wood sawdust 10%; and wherein the ignition charge comprises a shotgun powder and finely divided black powder.
Claim 8
Dependent Claim
140 words
An igniter assembly for igniting the fuel in orchard smudge pots and the like having a casing defining a chamber adapted to hold a combustible material and providing an opening for receipt of said assembly therein, comprising a longitudinally extending cartridge holder adapted to extend through such opening and be secured to such casing for communication with the chamber defined thereby, and electric insulator member affixed to said holder adjacent the outer end portion thereof and being equipped with terminals for connection to an electric control circuit and to the conductors from an ignition cartridge, and fastener means for securing said holder to such casing, said holder being pRovided with a longitudinally extending passage therein open at its inner end and through which a jet flame from an ignition cartridge mounted within said passage can issue toward such combustible material.
Claim 9
Dependent Claim
140 words
An igniter assembly for igniting the fuel in orchard smudge pots and the like having a casing defining a chamber adapted to hold a combustible material and providing an opening for receipt of said assembly therein, comprising a longitudinally extending cartridge holder adapted to extend through such opening and be secured to such casing for communication with the chamber defined thereby, and electric insulator member affixed to said holder adjacent the outer end portion thereof and being equipped with terminals for connection to an electric control circuit and to the conductors from an ignition cartridge, and fastener means for securing said holder to such casing, said holder being pRovided with a longitudinally extending passage therein open at its inner end and through which a jet flame from an ignition cartridge mounted within said passage can issue toward such combustible material.
Claim 10
Dependent Claim
74 words
The igniter assembly of claim 7 and further comprising an ignition cartridge including longitudinally extending tube structure mounted within said holder and containing a main pyrotechnic charge and also an ignition charge adjacent its inner end for firing said main charge, and an electric igniter element in thermal proximity with said ignition charge for energizing the same and having conductors leading to the exterior of said tube structure and being connected with said terminals.
Claim 11
Dependent Claim
68 words
The igniter assembly of claim 8 in which said ignition cartridge further includes an orifice plug carried by said tube structure adjacent the inner end thereof and having an orifice therethrough for directing the jet flame resulting from combustion of said main charge, means closing the outer end of said tube structure, and a burnout diaphragm extending across said orifice to close the interior of said tube structure.
Claim 12
Dependent Claim
45 words
The igniter assembly of claim 9 in which said tube structure includes a pair of telescopically related inner and outer tubes, said conductors being lead wires extending intermediate said tubes and supporting said ignition cartridge with said passage by the physical connection with said terminals.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |