US3881056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Parabolic sound reflecting microphone holder
Assignee: Individual
•
Filing: 1973-04-02
•
Granted: 1975-04-29
•
Expires: 1993-04-02
Abstract
Abstract A parabolic sound reflecting microphone holder is disclosed made of a transparent plastics material about 18 inches in diameter and from 0.080 to 0.125 inches thick having good acoustic properties in the low frequency range of from about 150 to 500 cycles per second.
Inventors
- 👤 Daniel Armstrong Gibson
- 👤 Robert Justin Ryan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:26
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/32; H04R1/34; H04R1/342
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
199 words
A light weight, hand held sound reflecting parabola and microphone holder assembly comprising: a. a parabolic shell having a sound reflecting surface, b. a shaft passing through the parabolic shell parallel to but displaced from the parabolic axis, said shaft being adjustable in both senses of a direction parallel to the parabolic axis; c. means carried by the shaft on the side of the parabolic shell adjacent the sound reflecting surface to support a microphone, said means extending from the shaft towards the parabolic axis so that the microphone may be supported on the said axis; d. handle means carried by the shaft on the side of the parabolic shell remote from the sound reflecting surface to enable the human hand to grasp and support the sound reflecting parabola and microphone holder assembly; e. the parabolic shell being: 1. circular in a plane normal to the parabolic axis; 2. made of transparent cellulose acetate butyrate plastics material; 3. of a thickness of between about 0.080 and 0.125 inches; 4. of a diameter of the order of about 18 inches; and 5. of a curvature such that its focus lies in a plane containing the rim of the parabolic shell.
Claim 2
Dependent Claim
199 words
A light weight, hand held sound reflecting parabola and microphone holder assembly comprising: a. a parabolic shell having a sound reflecting surface, b. a shaft passing through the parabolic shell parallel to but displaced from the parabolic axis, said shaft being adjustable in both senses of a direction parallel to the parabolic axis; c. means carried by the shaft on the side of the parabolic shell adjacent the sound reflecting surface to support a microphone, said means extending from the shaft towards the parabolic axis so that the microphone may be supported on the said axis; d. handle means carried by the shaft on the side of the parabolic shell remote from the sound reflecting surface to enable the human hand to grasp and support the sound reflecting parabola and microphone holder assembly; e. the parabolic shell being: 1. circular in a plane normal to the parabolic axis; 2. made of transparent cellulose acetate butyrate plastics material; 3. of a thickness of between about 0.080 and 0.125 inches; 4. of a diameter of the order of about 18 inches; and 5. of a curvature such that its focus lies in a plane containing the rim of the parabolic shell.
Claim 3
Dependent Claim
8 words
made of transparent cellulose acetate butyrate plastics material;
Claim 4
Dependent Claim
8 words
made of transparent cellulose acetate butyrate plastics material;
Claim 5
Dependent Claim
10 words
of a thickness of between about 0.080 and 0.125 inches;
Claim 6
Dependent Claim
10 words
of a thickness of between about 0.080 and 0.125 inches;
Claim 7
Dependent Claim
11 words
of a diameter of the order of about 18 inches; and
Claim 8
Dependent Claim
11 words
of a diameter of the order of about 18 inches; and
Claim 9
Dependent Claim
18 words
of a curvature such that its focus lies in a plane containing the rim of the parabolic shell.
Claim 10
Dependent Claim
18 words
of a curvature such that its focus lies in a plane containing the rim of the parabolic shell.
References Cited (Backward Citations)
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US1899966A
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US1899994A
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US2049586A
Cited
US3305043A
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US3723962A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |