US4097315A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic orientation of casting powder granules
Assignee: Hercules LLC
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Filing: 1968-03-21
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Granted: 1978-06-27
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Expires: 1988-03-21
Abstract
Abstract A casting powder granule containing a magnetic material is provided. The granule can be oriented in a desired direction by an applied magnetic field. Cast propellant charges having augmented burning rates can be prepared from magnetically susceptible casting powder granules containing metallic staple which are oriented by a magnetic field prior to addition of casting solvent.
Inventors
- 👤 William H. Gardner
- 👤 Donald H. Graham
- 👤 George M. Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:36
CPC Classifications
C; C06; C06B; C06B45/00; C06B45/04; C06B21/00; C06B21/0033; C06B21/0058
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
62 words
A granule of propellant casting powder having incorporated therein a magnetic material having a magnetic susceptibility of at least about 0.1/4π, said magnetic material being incorporated in said granule of propellant casting powder in an amount sufficient to orient the propellant casting powder granule in the desired direction when said granule of propellant casting powder is subjected to an applied magnetic field.
Claim 2
Dependent Claim
62 words
A granule of propellant casting powder having incorporated therein a magnetic material having a magnetic susceptibility of at least about 0.1/4π, said magnetic material being incorporated in said granule of propellant casting powder in an amount sufficient to orient the propellant casting powder granule in the desired direction when said granule of propellant casting powder is subjected to an applied magnetic field.
Claim 3
Dependent Claim
17 words
The granule of propellant casting powder of claim 1 wherein the casting powder granule contains metallic staple.
Claim 4
Dependent Claim
20 words
The granule of propellant casting powder of claim 1 wherein the magnetic material is employed in the form of powder.
Claim 5
Dependent Claim
20 words
The granule of propellant casting powder of claim 1 wherein the magnetic material is employed in the form of wire.
Claim 6
Dependent Claim
20 words
The granule of propellant casting powder of claim 1 wherein the magnetic material is employed in the form of staple.
Claim 7
Dependent Claim
17 words
The granule of propellant casting powder of claim 2 wherein the metallic staple is comprised of aluminum.
Claim 8
Dependent Claim
31 words
The granule of propellant casting powder of claim 2 wherein the magnetic material comprises from about 0.1 to about 10% by weight based on the weight of the casting powder granule.
Claim 9
Dependent Claim
79 words
A cast propellant charge prepared from oriented casting powder granules and a casting solvent wherein the casting powder granule has incorporated therein a magnetic material having a magnetic susceptibility of at least about 0.1/4π, in an amount of from about 0.1 to about 10% by weight based on the weight of the casting powder granule, and metallic staple, said casting powder granules being oriented in the desired direction by an applied magnetic field prior to casting with casting solvent.
Claim 10
Dependent Claim
79 words
A cast propellant charge prepared from oriented casting powder granules and a casting solvent wherein the casting powder granule has incorporated therein a magnetic material having a magnetic susceptibility of at least about 0.1/4π, in an amount of from about 0.1 to about 10% by weight based on the weight of the casting powder granule, and metallic staple, said casting powder granules being oriented in the desired direction by an applied magnetic field prior to casting with casting solvent.
Claim 11
Dependent Claim
32 words
The granule of propellant casting powder of claim 7 wherein the magnetic material is selected from the group consisting of iron, cobalt, nickel, gadolium, terbium, dysprosium, halmium, erbium and the alloys thereof.
Claim 12
Dependent Claim
57 words
The granule of propellant casting powder of claim 7 wherein the magnetic material is a ferrite material of the general formula (MO.Fe 2 O 3 ) wherein M is one of or a mixture of divalent cations selected from the group consisting of manganese, cobalt, nickel, copper, magnesium, cadmium and the ferrous cation Fe 2 + .
Claim 13
Independent Claim
91 words
The method of augmenting the burning rate of cast propellant charges which comprises (a) preparing casting powder granules having incorporated therein a magnetic material and metallic staple, (b) filling a mold with the casting powder granules of step (a) and subjecting the casting powder granules to a magnetic field whereby the casting powder granules are oriented in the direction desired, (c) filling the mold containing the oriented casting powder granules with a casting solvent, and (d) curing the cast propellant to form a solid propellant charge having an augmented burning rate.
Claim 14
Independent Claim
91 words
The method of augmenting the burning rate of cast propellant charges which comprises (a) preparing casting powder granules having incorporated therein a magnetic material and metallic staple, (b) filling a mold with the casting powder granules of step (a) and subjecting the casting powder granules to a magnetic field whereby the casting powder granules are oriented in the direction desired, (c) filling the mold containing the oriented casting powder granules with a casting solvent, and (d) curing the cast propellant to form a solid propellant charge having an augmented burning rate.
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) | 1981-06-26 | 1981-12-26 | 1982-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-26 | 1985-12-26 | 1986-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-26 | 1989-12-26 | 1990-06-27 | $7700.00 | Window Closed / Lapsed |