US4014264A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined igniter cap
Assignee: Dynamit Nobel AG
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Filing: 1975-08-21
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Granted: 1977-03-29
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Expires: 1995-08-21
Abstract
Abstract A combined igniter cap for electrical and nonelectrical ignition having an electrically conductive housing with a pole piece arranged therein. A first primer charge is arranged on a first side of the pole piece, and the pole piece being provided with a recess and a first communicating path through the pole piece between the recess and the first primer charge. A second ignition system is arranged in the recess and is ignitable from a second side of said pole piece which is disposed oppositely to the first side. An insulating element is disposed between the first side of said pole piece and the first primer charge and is provided with first and second electrical contact members having an electrical ignition bridge and/or gap formed therebetween. The electrical ignition bridge and/or gap faces the first primer charge and the first contact member is electrically conductively connected with the pole piece while the second contact member is electrically conductively connected with the housing. The insulating element is further provided with a second communicating path providing communication between the first communicating path and the first primer charge.
Inventors
- 👤 Hellmut Bendler
- 👤 Heinz Gawlick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:36
CPC Classifications
F; F42; F42C; F42C19/00; F42C19/08; F42C19/12; F42C19/14; F42B; F42B3/00; F42B3/10; F42B3/12; F42B3/125; F42C19/0815; F42C19/10
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
197 words
A combined igniter cap comprising an electrically conductive housing having a unitary one-piece pole piece arranged therein, a first primer charge arranged on a first side of said pole piece, said pole piece being provided with a recess and means providing a first communicating path through said pole piece between said recess and said first primer charge, a second ignition system being arranged in said recess and being ignitable from a second side of said pole piece which is disposed oppositely to said first side, and insulating element means formed of an electrically nonconductive material being disposed between said first side of said pole piece and said first primer charge, said insulating element means including first and second electrical contact members and an electrical ignition means formed therebetween, said electrical ignition means being arranged immediately adjacent a surface of said nonconductive material facing said first primer charge, said first contact member being electrically conductively connected with said pole piece and said second contact member being electrically conductively connected with said housing, said insulating element means further including second communicating path means for providing a communicating path between said first communicating path means and said first primer charge.
Claim 2
Dependent Claim
197 words
A combined igniter cap comprising an electrically conductive housing having a unitary one-piece pole piece arranged therein, a first primer charge arranged on a first side of said pole piece, said pole piece being provided with a recess and means providing a first communicating path through said pole piece between said recess and said first primer charge, a second ignition system being arranged in said recess and being ignitable from a second side of said pole piece which is disposed oppositely to said first side, and insulating element means formed of an electrically nonconductive material being disposed between said first side of said pole piece and said first primer charge, said insulating element means including first and second electrical contact members and an electrical ignition means formed therebetween, said electrical ignition means being arranged immediately adjacent a surface of said nonconductive material facing said first primer charge, said first contact member being electrically conductively connected with said pole piece and said second contact member being electrically conductively connected with said housing, said insulating element means further including second communicating path means for providing a communicating path between said first communicating path means and said first primer charge.
Claim 3
Dependent Claim
28 words
A combined igniter cap according to claim 1, wherein said first communicating path means includes at least one bore extending in the axial direction of said pole piece.
Claim 4
Dependent Claim
47 words
A combined igniter cap according to claim 2, wherein said second communicating path means includes at least one aperture extending in the axial direction of said insulating element means and being at least partially congruent with said at least one axially extending bore of said pole piece.
Claim 5
Dependent Claim
67 words
A combined igniter cap according to claim 3, wherein said at least one bore is centrally arranged in said pole piece, said recess of said pole piece and said at least one aperture of said insulating element means being arranged coaxially with said centrally arranged bore, said bore and said recess being connected by a conically-shaped constriction for concentrating an ignition jet of said second ignition system.
Claim 6
Dependent Claim
46 words
A combined igniter cap according to claim 4, wherein said at least one bore is a single centrally arranged bore and said at least one aperture in said insulating element means is a single aperture, said conically-shaped constriction narrowing in the direction of said single bore.
Claim 7
Dependent Claim
32 words
A combined igniter cap according to claim 1, wherein said second ignition system includes a striker primer cap means and a striker-sensitive ignition charge arranged in said recess of said pole piece.
Claim 8
Dependent Claim
37 words
A combined igniter cap according to claim 6, wherein said striker-sensitive ignition charge is at least partially arranged in said first communicating path means and is directly pressed into said recess and said first communicating path means.
Claim 9
Dependent Claim
39 words
A combined igniter cap according to claim 6, wherein said striker primer cap means includes an electrically conductive striker element and a holding element for said striker element, said holding element being electrically conductively connected with said pole piece.
Claim 10
Dependent Claim
46 words
A combined igniter cap according to claim 8, wherein said holding element is an annular collar surrounding said striker element and arranged to be sheared off when a force is applied to said striker element for causing said striker element to strike said striker-sensitive ignition charge.
Claim 11
Dependent Claim
36 words
A combined igniter cap according to claim 8, further comprising electrical insulation disposed between said pole piece and said housing, said holding element being clamped between said pole piece and said insulation resting on said housing.
Claim 12
Dependent Claim
38 words
A combined igniter cap according to claim 1, wherein said second ignition system includes a percussion-sensitive primer cap means having a cup-shaped housing and an anvil provided therein, said anvil resting in said recess of said pole piece.
Claim 13
Dependent Claim
24 words
A combined igniter cap according to claim 11, wherein said percussion-sensitive primer cap means includes a percussion-sensitive ignition charge arranged within said cup-shaped housing.
Claim 14
Dependent Claim
18 words
A combined igniter cap according to claim 1, wherein said second ignition system is a nonelectrical ignition system.
Claim 15
Dependent Claim
26 words
A combined igniter cap according to claim 13, wherein said nonelectrical ignition system includes a flame-sensitive ignition charge arranged in said recess of said pole piece.
Claim 16
Dependent Claim
23 words
A combined igniter cap according to claim 1, wherein said electrical ignition means is one of an ignition bridge and an ignition gap.
Claim 17
Dependent Claim
31 words
A combined igniter cap according to claim 1, wherein said pole piece is provided with a depression at said first side thereof, said insulating element means being arranged within said depression.
Claim 18
Dependent Claim
32 words
A combined igniter cap according to claim 4, wherein said second ignition system includes a striker primer cap means and a striker-sensitive ignition charge arranged in said recess of said pole piece.
Claim 19
Dependent Claim
39 words
A combined igniter cap according to claim 17, wherein said striker primer cap means includes an electrically conductive striker element and a holding element for said striker element, said holding element being electrically conductively connected with said pole piece.
Claim 20
Dependent Claim
46 words
A combined igniter cap according to claim 18, wherein said holding element is an annular collar surrounding said striker element and arranged to be sheared off when a force is applied to said striker element for causing said striker element to strike said striker-sensitive ignition charge.
Claim 21
Dependent Claim
36 words
A combined igniter cap according to claim 18, further comprising electrical insulation disposed between said pole piece and said housing, said holding element being clamped between said pole piece and said insulation resting on said housing.
Claim 22
Dependent Claim
38 words
A combined igniter cap according to claim 4, wherein said second ignition system includes a percussion-sensitive primer cap means having a cup-shaped housing and an anvil provided therein, said anvil resting in said recess of said pole piece.
Claim 23
Dependent Claim
18 words
A combined igniter cap according to claim 4, wherein said second ignition system is a nonelectrical ignition system.
Claim 24
Dependent Claim
28 words
A combined igniter cap according to claim 1, further comprising electrical insulation means contacting said pole piece and said housing for insulating said pole piece from said housing.
Claim 25
Dependent Claim
45 words
A combined igniter cap according to claim 23, wherein said insulating element means includes an annular element having portions of said first and second electrical contact members disposed on an end surface thereof facing said first primer charge, said electrical ignition means being formed therebetween.
Claim 26
Dependent Claim
23 words
A combined igniter cap according to claim 24, wherein said electrical ignition means is one of an ignition bridge and an ignition gap.
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) | 1980-03-28 | 1980-09-27 | 1981-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-28 | 1984-09-27 | 1985-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-28 | 1988-09-27 | 1989-03-29 | $7700.00 | Window Closed / Lapsed |