US3819005A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loudspeaker cabinet with sound reflectors
Assignee: Individual
•
Filing: 1973-01-22
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Granted: 1974-06-25
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Expires: 1993-01-22
Abstract
Abstract This specification discloses a loudspeaker cabinet comprising a frame on which is mounted a spherical receptacle carrying a pair of loudspeakers in angularly spaced relation, together with a sound reflector operatively associated with each speaker and of a special design. Each reflector is of fiberglass and has an inner reflecting surface consisting of two concave annular surfaces which meet at an apical line. The inner of these annular surfaces is generated by rotating an arc of a circle through 360* with an end of the arc the pivot point. The outer annular surface is generated by moving an arc of another circle through 360*.
Inventors
- 👤 J Westlund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:58
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/32; H04R1/34; G; G10; G10K; G10K11/00; G10K11/18; G10K11/26; G10K11/28; H04R1/345
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
175 words
In a loudspeaker cabinet, a. a frame, b. a spherical receptacle mounted in said frame, c. a loudspeaker carried by said receptacle and opening onto the outer surface thereof, and d. a sound reflector mounted on said frame, said sound reflector being of fiberglass and comprising an inner concave conical section and an outer concave annular section, with said sections being integrally joined at an apical line and the conical section having a point partially entering said loudspeaker, said inner concave conical section being generated by rotating an arc of a circle through 360*, with an end of the arc at said point, and the outer concave annular section being generated by moving an arc of a circle of a radius different from that used in generating said inner concave conical section through 360*, with said outer concave annular section extending from said apical line back in the same general direction in which said inner concave conical section extends from said apical line, whereby it assumes a position in spaced relation to said spherical receptacle.
Claim 2
Dependent Claim
175 words
In a loudspeaker cabinet, a. a frame, b. a spherical receptacle mounted in said frame, c. a loudspeaker carried by said receptacle and opening onto the outer surface thereof, and d. a sound reflector mounted on said frame, said sound reflector being of fiberglass and comprising an inner concave conical section and an outer concave annular section, with said sections being integrally joined at an apical line and the conical section having a point partially entering said loudspeaker, said inner concave conical section being generated by rotating an arc of a circle through 360*, with an end of the arc at said point, and the outer concave annular section being generated by moving an arc of a circle of a radius different from that used in generating said inner concave conical section through 360*, with said outer concave annular section extending from said apical line back in the same general direction in which said inner concave conical section extends from said apical line, whereby it assumes a position in spaced relation to said spherical receptacle.
Claim 3
Dependent Claim
36 words
The loudspeaker cabinet of claim 1 together with a second loudspeaker in said receptacle and angularly spaced from said first loudspeaker and a second sound reflector of the same construction as said first mentioned sound reflector.
Claim 4
Dependent Claim
58 words
The loudspeaker cabinet of claim 2 in which the frame comprises four vertical legs, lower struts, upper struts and a pair of A-frames having apices and an apex bar connecting the apices, with one sound reflector being secured to the lower struts and the other sound reflector secured to an upper strut, the apex bar and said A-frames.
Claim 5
Dependent Claim
56 words
The loudspeaker cabinet of claim 3 in which there are two short front legs and two longer rear legs, and each A-frame has a short side, the lower end of which is connected to the upper end of a rear leg, and a long side, the lower end of which is connected to a front leg.
Claim 6
Dependent Claim
73 words
The loudspeaker cabinet of claim 3 in which a fastening assembly is used to mount the spherical receptacle in the frame, each of said fastening assemblies including a spacer sleeve having a threaded bore, a screw bolt passing through the passage in the reCeptacle and in threaded engagement with said bore, and another screw bolt passing through a passage in a frame element and in threaded engagement with the bore of said sleeve.
Claim 7
Dependent Claim
40 words
The loudspeaker cabinet of claim 5 in which all of the elements of the frame are tubular and of rectangular cross-section and in which the passage in the frame element is provided by a sleeve spanning the tubular cross-section thereof.
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) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |