Patent US3744802A successfully refreshed from Google Patents.
US3744802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tone arm for record turn table
Assignee: Individual
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Filing: 1970-12-21
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Granted: 1973-07-10
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Expires: 1990-12-21
Abstract
Abstract A tone arm for a record turntable is movable in the horizontal plane only, the needle tip being independently movable into and out of engagement with the record surface. A fluidic system controls the pressure of the needle against the record through an extensible bellows supporting the needle. An air jet control system is also provided for moving the tone arm with respect to the record surface. In one instance, the tone arm moves by a jetting action along a radial path, the arm being hinged to open or closed air ports on a carriage mounted for movement along a transverse support. In another embodiment, a pivoted tone arm is provided with jet ports at its outer end for selective pivoting action of the arm.
Inventors
- 👤 W Bowerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:34
CPC Classifications
G; G11; G11B; G11B3/00; G11B3/02; G11B3/10; G11B3/12; G11B3/125
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
91 words
A phonograph, comprising in combination a. a record turntable, b. a tone arm mounted to said phonograph in spaced relation to said turntable and movable only in a plane parallel to said turntable, c. extensible needle support means including a bellows mounted to said arm for movement to and away from said turntable independently of the movement of said arm, and, d. fluidic control means for selectively actuating said support means, e. said control means including a variable pressure fluidic system connected to said bellows for selective extension and retraction thereof.
Claim 2
Dependent Claim
91 words
A phonograph, comprising in combination a. a record turntable, b. a tone arm mounted to said phonograph in spaced relation to said turntable and movable only in a plane parallel to said turntable, c. extensible needle support means including a bellows mounted to said arm for movement to and away from said turntable independently of the movement of said arm, and, d. fluidic control means for selectively actuating said support means, e. said control means including a variable pressure fluidic system connected to said bellows for selective extension and retraction thereof.
Claim 3
Dependent Claim
49 words
A phonograph according to claim 1 wherein said fluidic system includes another bellows remote from the first bellows, conduit means connecting both of said bellows and actuating means connected to said other bellows for selective extension and retraction thereof whereby the first bellows will be selectively extended and retracted.
Claim 4
Dependent Claim
13 words
A phonograph according to claim 2 wherein said actuating means is a solenoid.
Claim 5
Dependent Claim
101 words
A phonograph, comprising in combination a. a record turntable, b. a tone arm mounted to said phonograph in spaced relation to said turntable and movable only in a plane parallel to said turntable, c. extensible needle support means mounted to said arm for movement to and away from said turntable independently of the movement of said arm, d. fluidic control means for selectively actuating said support means, and, e. pressure sensing means connected to saiD support means and operatively connected to said control means for selectively extending and retracting said support means in response to changing pressure against said support means.
Claim 6
Dependent Claim
101 words
A phonograph, comprising in combination a. a record turntable, b. a tone arm mounted to said phonograph in spaced relation to said turntable and movable only in a plane parallel to said turntable, c. extensible needle support means mounted to said arm for movement to and away from said turntable independently of the movement of said arm, d. fluidic control means for selectively actuating said support means, and, e. pressure sensing means connected to saiD support means and operatively connected to said control means for selectively extending and retracting said support means in response to changing pressure against said support means.
Claim 7
Dependent Claim
104 words
A phonograph, comprising in combination a. a record turntable, b. a tone arm mounted to said phonograph in spaced relation to said turntable and movable only in a plane parallel to said turntable, c. extensible needle support means mounted to said arm for movement to and away from said turntable independently of the movement of said arm, and, d. fluidic control means for selectively actuating said support means, e. said arm being pivotally mounted about an axis perpendicular to said plane, f. said arm including selectively operable nozzle means adjacent the tip end thereof and compressed gas means connected thereto for pivoting said arm.
Claim 8
Dependent Claim
104 words
A phonograph, comprising in combination a. a record turntable, b. a tone arm mounted to said phonograph in spaced relation to said turntable and movable only in a plane parallel to said turntable, c. extensible needle support means mounted to said arm for movement to and away from said turntable independently of the movement of said arm, and, d. fluidic control means for selectively actuating said support means, e. said arm being pivotally mounted about an axis perpendicular to said plane, f. said arm including selectively operable nozzle means adjacent the tip end thereof and compressed gas means connected thereto for pivoting said arm.
Claim 9
Dependent Claim
183 words
A phonograph, comprising in combination a. a record turntable, b. a tone arm mounted to said phonograph in spaced relation to said turntable and movable only in a plane parallel to said turntable, c. extensible needle support means mounted to said arm for movement to and away from said turntable independently of the movement of said arm, d. fluidic control means for selectively actuating said support means, e. an elongated guide parallel to said plane and perpendicular to said arm, said arm being movably mounted along said guide and extending in spaced relation over said turntable in position to traverse a needle radially across said turntable and an air bearing formed between said guide and said arm, f. a carriage mounted to said guide and said arm being pivotally connected to said carriage for angular movement in said plane, oppositely facing ports formed in said carriage, means connecting said ports to a source of compressed gas, and valve means on said arm in position to open and close said ports upon angular movement of said arm for urging said carriage along said guide.
Claim 10
Dependent Claim
183 words
A phonograph, comprising in combination a. a record turntable, b. a tone arm mounted to said phonograph in spaced relation to said turntable and movable only in a plane parallel to said turntable, c. extensible needle support means mounted to said arm for movement to and away from said turntable independently of the movement of said arm, d. fluidic control means for selectively actuating said support means, e. an elongated guide parallel to said plane and perpendicular to said arm, said arm being movably mounted along said guide and extending in spaced relation over said turntable in position to traverse a needle radially across said turntable and an air bearing formed between said guide and said arm, f. a carriage mounted to said guide and said arm being pivotally connected to said carriage for angular movement in said plane, oppositely facing ports formed in said carriage, means connecting said ports to a source of compressed gas, and valve means on said arm in position to open and close said ports upon angular movement of said arm for urging said carriage along said guide.
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) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |