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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
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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)

US1911772A Cited
US1899966A Cited
US1899994A Cited
US2049586A Cited
US3305043A Cited
US3723962A Cited

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

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