US3633923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Handy acoustic reproducing device
Assignee: Individual
•
Filing: 1969-12-08
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Granted: 1972-01-11
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Expires: 1989-12-08
Abstract
Abstract A handy acoustic reproducing device including a presser arm bar extending in the diametrical direction of a disc which is rotated by actuation of an electric motor, one end of said arm bar resting on to a pickup member adapted to normally have a tendency to move towards the outer periphery of the disc, the other end of said arm bar being pivoted to a baseplate and arranged to constantly receive resilient pushing-up force given by a spring, and also including a speaker loosely mounted on a stem provided projectingly in the center of said arm bar, the top face of said speaker being arranged to be pressed against a perforated top cover member, wherein the other end of said presser arm bar is coupled to an operating rod having an outer end above said top cover member such as to provide a gradually increasing pressing force to the pickup which moves along the grooves on the disc, thereby to suitably control the pressure exerted upon the stylus so as to always keep constant the rotating speed of the disc.
Inventors
- 👤 Katsumi Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:21
CPC Classifications
G; G11; G11B; G11B33/00; G11B33/02; G11B33/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
237 words
In an acoustic reproducing device, a case having a baseplate and a top cover member situated over and spaced from said baseplate and formed with a plurality of perforations, a speaker situated between said cover member and baseplate in engagement with said cover member and aligned with said perforations, a turntable mounted for rotation in said case, a pickup arm having a stylus for engaging a rotary disc record on said turntable, said pickup arm being swingably mounted on said baseplate between the latter and said cover member, an elongated presser bar pressing at one end against said pickup arm for urging the latter toward said disc record, said presser bar pivotably mounting rail speaker at an intermediate portion of said presser bar and having an opposed end portion distant from said pickup arm, and a spring acting on said presser bar at said opposed end portion thereof, said bar mounting said speaker substantially in alignment with the center of said disc record, the pickup arm being mounted to swing toward said center pickup during playing of tHe record, whereby said spring on the one hand compresses the speaker between said presser bar and top cover member and on the other hand, with said speaker acting as a fulcrum, provides the force with which the presser bar presses against said pickup arm, which force gradually increases as the pickup arm approaches the center of a disc record.
Claim 2
Dependent Claim
237 words
In an acoustic reproducing device, a case having a baseplate and a top cover member situated over and spaced from said baseplate and formed with a plurality of perforations, a speaker situated between said cover member and baseplate in engagement with said cover member and aligned with said perforations, a turntable mounted for rotation in said case, a pickup arm having a stylus for engaging a rotary disc record on said turntable, said pickup arm being swingably mounted on said baseplate between the latter and said cover member, an elongated presser bar pressing at one end against said pickup arm for urging the latter toward said disc record, said presser bar pivotably mounting rail speaker at an intermediate portion of said presser bar and having an opposed end portion distant from said pickup arm, and a spring acting on said presser bar at said opposed end portion thereof, said bar mounting said speaker substantially in alignment with the center of said disc record, the pickup arm being mounted to swing toward said center pickup during playing of tHe record, whereby said spring on the one hand compresses the speaker between said presser bar and top cover member and on the other hand, with said speaker acting as a fulcrum, provides the force with which the presser bar presses against said pickup arm, which force gradually increases as the pickup arm approaches the center of a disc record.
Claim 3
Dependent Claim
88 words
The combination of claim 1 and wherein an operating rod extends through said top cover member to the exterior thereof and engages a region of said presser bar more distant from said pickup arm than said spring, and a second spring urging said pickup arm outwardly away from the center of a record, so that when said operating rod is manipulated to swing said presser bar away from said pickup arm the latter will be returned to a starting position away from the center of a disc record.
Claim 4
Dependent Claim
81 words
The combination of claim 1 and wherein an electric motor is operatively connected to said turntable for rotating the latter, and an electrical circuit for energizing said motor, said circuit including a switch assembly having a resilient contact located to be engaged by said pickup arm when the latter reaches the inner end of a recorded portion of a disc record, so that the circuit of said motor will be opened by said pickup arm to stop rotation of the turntable.
Claim 5
Dependent Claim
89 words
The combination of claim 3 and wherein said case has a swingable bottom portion carrying said turntable, a switch rod extending from said swingable bottom portion through the center of a disc record, and a second switch in series with said first-named switch and adapted to be closed by said switch rod, said second switch positioned to assume a closed position when said bottom portion closes said case and an open position when said bottom portion is swung to open said case for changing a record on the turntable.
Claim 6
Dependent Claim
19 words
The combination of claim 4 and wherein a detent assembly releasably holds the bottom portion in a closed position.
References Cited (Backward Citations)
US3467393A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |