Patent US660461A successfully refreshed from Google Patents.
US3945461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound speaker system
Assignee: Individual
•
Filing: 1974-10-16
•
Granted: 1976-03-23
•
Expires: 1994-10-16
Abstract
Abstract The sound speaker system comprises an elongated vertical cylinder having an overall length equal to an integral multiple of its inside diameter. The cylinder is open at its upper and lower ends and a loudspeaker is positioned adjacent its lower end. The diameter of the loudspeaker cone is equal to one-half the inside diameter of the cylinder. The system is designed to be placed in the corner of a room so that sound emanating from the lower and upper ends is reflected by the floor and ceiling corners respectively into the room.
Inventors
- 👤 Ralph J. Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:44
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/22; H04R1/28; H04R1/2807; H04R1/2811; H04R1/02; H04R1/021
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
197 words
A sound speaker system including: a. A first elongated vertical cylinder having upper and lower open ends, a given inside diameter and a given length, said length constituting an integral multiple greater than 2 of said given inside diameter; b. a secondary cylinder of length at least equal to said given inside diameter of said first elongated cylinder, said secondary cylinder telescopically receiving the lower open end of said first elongated cylinder; c. stop means for supporting said first elongated cylinder in a given telescoped position in said secondary cylinder; d. a loudspeaker having a nominal given diameter equal to 1/2 said inside diameter of said first elongated cylinder disposed in the lower end of said secondary cylinder so that the overall length of the elongated and secondary cylinders can be adjusted to equal at least one integral multiple greater than the integral multiple of said inside diameter defining the length of said first elongated cylinder only; and e. a base stand supporting said loudspeaker and lower open end of said secondary cylinder a given distance above the floor so that sound can freely pass from both the upper and lower open ends of the telescoped cylinders.
Claim 2
Dependent Claim
197 words
A sound speaker system including: a. A first elongated vertical cylinder having upper and lower open ends, a given inside diameter and a given length, said length constituting an integral multiple greater than 2 of said given inside diameter; b. a secondary cylinder of length at least equal to said given inside diameter of said first elongated cylinder, said secondary cylinder telescopically receiving the lower open end of said first elongated cylinder; c. stop means for supporting said first elongated cylinder in a given telescoped position in said secondary cylinder; d. a loudspeaker having a nominal given diameter equal to 1/2 said inside diameter of said first elongated cylinder disposed in the lower end of said secondary cylinder so that the overall length of the elongated and secondary cylinders can be adjusted to equal at least one integral multiple greater than the integral multiple of said inside diameter defining the length of said first elongated cylinder only; and e. a base stand supporting said loudspeaker and lower open end of said secondary cylinder a given distance above the floor so that sound can freely pass from both the upper and lower open ends of the telescoped cylinders.
Claim 3
Dependent Claim
30 words
A system according to claim 1, in which said stop means are adjustable in position so that said overall length can be adjusted in amounts to compensate for temperature changes.
Claim 4
Dependent Claim
98 words
A system according to claim 2, in which said base stand further includes a flat horizontal circular surface with legs secured to its underside, said secondary cylinder being supported on said surface, said surface having a central opening defining an annular ledge for receiving and supporting said loudspeaker when said loudspeaker is facing vertically downwardly, the loudspeaker cone resting on the ledge such that said loudspeaker can be removed and turned over and positioned in said central opening with the rear periphery of the cone being supported by the ledge so that the loudspeaker is facing vertically upwardly.
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) | 1979-03-23 | 1979-09-22 | 1980-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-23 | 1983-09-22 | 1984-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-23 | 1987-09-22 | 1988-03-23 | $7700.00 | Window Closed / Lapsed |