Patent US3563178A successfully refreshed from Google Patents.
US3563178A
Expired / Lapsed
US
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Mechanical primer
Assignee: Catalyst Research Corp
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Filing: 1969-02-19
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Granted: 1971-02-16
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Expires: 1989-02-19
Abstract
Abstract A rigid conical ram extends into an expandable perforated cone, but is spaced from it. The opposed surfaces of the cone and ram are coated with different components of pyrotechnic material that will ignite when brought together and subjected to compression and shear forces. The ram is supported for longitudinal movement so that it can be moved further into the cone in order to rub the pyrotechnic coatings together under pressure. The ignited material ignites other material around the cone.
Inventors
- 👤 Allen Scott Caples
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:40
CPC Classifications
F; F42; F42C; F42C19/00; F42C19/08; F42C19/0815
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
120 words
A primer comprising a hollow expandable perforated cone, a rigid a ram extending into the cone but spaced therefrom, the ram inside the cone being the same shape in cross section and being tapered at substantially the same angle as the inside of the cone, pyrotechnic coatings on the opposed side surfaces of the cone and ram, said coatings being spaced apart but ignitable when subjected to compression and shear forces, means supporting the ram for longitudinal movement so that it can be moved farther into the cone to engage and expand the cone and thereby ignite said pyrotechnic coatings, and a body of ignitable material around the cone for ignition by said ignited coatings through the perforations of cone.
Claim 2
Dependent Claim
120 words
A primer comprising a hollow expandable perforated cone, a rigid a ram extending into the cone but spaced therefrom, the ram inside the cone being the same shape in cross section and being tapered at substantially the same angle as the inside of the cone, pyrotechnic coatings on the opposed side surfaces of the cone and ram, said coatings being spaced apart but ignitable when subjected to compression and shear forces, means supporting the ram for longitudinal movement so that it can be moved farther into the cone to engage and expand the cone and thereby ignite said pyrotechnic coatings, and a body of ignitable material around the cone for ignition by said ignited coatings through the perforations of cone.
Claim 3
Dependent Claim
37 words
A primer according to claim 1, including a shear pin extending into said supporting means and the side of the ram to hold the ram stationary until sufficient pressure is applied to it to shear the pin.
Claim 4
Dependent Claim
33 words
A primer according to claim 1, including a bellows surrounding the outer end of the ram and secured thereto, and means supporting the bellows and sealing the space between it and the cone.
Claim 5
Dependent Claim
22 words
A primer according to claim 1, including means supporting the cone and said ram-supporting means in fixed position relative to each other.
Claim 6
Dependent Claim
17 words
A primer according to claim 4, in which said ram-supporting means is a bushing surrounding the ram.
Claim 7
Dependent Claim
32 words
A primer according to claim 1, in which the outer end portion of the ram is straight, and said supporting means is a bushing slidably receiving said straight portion of the ram.
Claim 8
Dependent Claim
40 words
A primer according to claim 1, including a case for said body of ignitable material, and a sleeve surrounding the case at the larger end of the cone, said ram-supporting means being connected to the outer end of the sleeve.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |