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US4118037A Expired / Lapsed US ⏱️ 0.0 years remaining

Record player

Assignee: Individual
•
Filing: 1977-04-29
•
Granted: 1978-10-03
•
Expires: 1997-04-29
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Abstract

Abstract A record player comprising a container, a cover attached to said container, a turntable rotatably mounted on said cover, a record on said turntable and having a relatively deep groove at the end of its playing side, an electric motor in said container for driving said turntable mounted in said container and being movable substantially axially towards the turntable under a spring bias, a tone arm having a stylus movable with the speaker towards the turntable so as to engage a record on the turntable, a switch operable by the speaker as the speaker moves towards the turntable to break a circuit supplying driving current to the motor, the switch being operated only as the cover is opened or the stylus drops into a said relatively deep groove at the end of the playing side of the record.

Inventors

  • 👤 Mun-Hay Ngai

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 10:58
CPC Classifications
G; G11; G11B; G11B19/00; G11B19/02; G11B19/16; G11B19/165; G11B3/00; G11B3/001

Claims Analysis

Total Claims: 13
Claim 1
Independent Claim 134 words
A record player comprising a container, a turntable rotatably mounted therein, a record on said turntable, said record containing a relatively deep circular groove at the end of the sound track, an electric motor for driving the turntable, a motor circuit and switch for enabling and disabling the motor, a speaker mounted in said container for movement toward the turntable, spring means for biasing the speaker toward the turntable, a tone arm having a stylus, movable with the speaker toward the turntable so as to hold the stylus engaged with the record on the turntable, said spring means being operable when the stylus reaches said circular groove to displace the tone arm downwardly to seat the stylus in the groove and means movable downwardly with the speaker and tone arm to disable the switch.
Claim 2
Dependent Claim 134 words
A record player comprising a container, a turntable rotatably mounted therein, a record on said turntable, said record containing a relatively deep circular groove at the end of the sound track, an electric motor for driving the turntable, a motor circuit and switch for enabling and disabling the motor, a speaker mounted in said container for movement toward the turntable, spring means for biasing the speaker toward the turntable, a tone arm having a stylus, movable with the speaker toward the turntable so as to hold the stylus engaged with the record on the turntable, said spring means being operable when the stylus reaches said circular groove to displace the tone arm downwardly to seat the stylus in the groove and means movable downwardly with the speaker and tone arm to disable the switch.
Claim 3
Dependent Claim 44 words
A record player according to claim 1, wherein the speaker is carried by a speaker frame pivotably mounted in the container, the speaker frame having a member bearing against the tone arm and the speaker for transmitting vibrations from the record, to the speaker.
Claim 4
Dependent Claim 48 words
A record player according to claim 2, wherein the tone arm is mounted on the speaker frame and is biased by means of a spring to move radially outwardly of the turntable and to move towards the turntable, and hence into the said deep groove on the record.
Claim 5
Dependent Claim 38 words
A record player according to claim 2 further comprising a depressible member for releasing the stylus from the groove of the record by depression of said member to cause pivoting of the speaker frame away from the turntable.
Claim 6
Dependent Claim 34 words
A record player according to claim 1, wherein the switch comprises a resilient metal contact movable away from a fixed metal contact by the speaker frame as the speaker frame moves towards the turntable.
Claim 7
Dependent Claim 16 words
a record player according to claim 1 and having a current regulator in the said circuit.
Claim 8
Dependent Claim 34 words
A record player according to claim 6, wherein the current regulator comprises a spindle pivotable about its axis and carrying a wiper arm slidable along a wire for altering current supplied to the motor.
Claim 9
Dependent Claim 35 words
A record player according to claim 1, wherein the motor has a spindle carrying a friction sleeve which in the closed position of the cover is in driving engagement with the periphery of the turntable.
Claim 10
Dependent Claim 31 words
A record player according to claim 1, wherein the turntable has resilient tangs for retaining a record on the turntable, the tangs being resilient deformable to allow removal of the record.
Claim 11
Dependent Claim 317 words
A record player comprising a container, a cover removably latched to the container, a turntable rotatably mounted on the cover, a record on the turntable, said record containing a relatively deep circular groove concentric with the center of the record at the end of the sound track, an electric motor for driving the turntable, a motor circuit and switch for enabling and disabling the motor, a speaker, a speaker frame supporting the speaker for movement substantially axially toward the turntable, a tone arm, means pivotally supporting one end of the tone arm on the speaker frame for movement therewith and movement relative thereto toward the turntable and for pivotal movement about said axis parallel to the turntable such that the distal end of the tone arm is free to travel toward and from the center of the turntable, a stylus fixed to the distal end of the tone arm for engagement with the record on the turntable, means associated with the speaker for engagement with the tone arm for transmitting vibrations from the stylus to the speaker, first spring means biasing the speaker frame in a direction to yieldably press the stylus against the record on the turntable supported by the latched cover, second spring means at the proximal end of the tone arm biasing the arm in a direction toward the outer side of the record and toward the speaker frame and yieldable to the pressure of the first spring means when the stylus reaches said circular groove to allow the tone arm to be displaced downwardly relative to the speaker frame to seat the stylus in the groove and be held therein by said first spring means and means on the speaker frame operable, on one hand, by movement of the speaker frame downwardly when the stylus drops into the groove and, on the other hand, by opening of the cover to disable said switch.
Claim 12
Dependent Claim 317 words
A record player comprising a container, a cover removably latched to the container, a turntable rotatably mounted on the cover, a record on the turntable, said record containing a relatively deep circular groove concentric with the center of the record at the end of the sound track, an electric motor for driving the turntable, a motor circuit and switch for enabling and disabling the motor, a speaker, a speaker frame supporting the speaker for movement substantially axially toward the turntable, a tone arm, means pivotally supporting one end of the tone arm on the speaker frame for movement therewith and movement relative thereto toward the turntable and for pivotal movement about said axis parallel to the turntable such that the distal end of the tone arm is free to travel toward and from the center of the turntable, a stylus fixed to the distal end of the tone arm for engagement with the record on the turntable, means associated with the speaker for engagement with the tone arm for transmitting vibrations from the stylus to the speaker, first spring means biasing the speaker frame in a direction to yieldably press the stylus against the record on the turntable supported by the latched cover, second spring means at the proximal end of the tone arm biasing the arm in a direction toward the outer side of the record and toward the speaker frame and yieldable to the pressure of the first spring means when the stylus reaches said circular groove to allow the tone arm to be displaced downwardly relative to the speaker frame to seat the stylus in the groove and be held therein by said first spring means and means on the speaker frame operable, on one hand, by movement of the speaker frame downwardly when the stylus drops into the groove and, on the other hand, by opening of the cover to disable said switch.
Claim 13
Dependent Claim 55 words
A record player according to claim 1 comprising means for moving the speaker frame and, hence, the tone arm away from the turntable to lift the stylus from the groove, said second spring means operating when the stylus is lifted from the groove to return the tone arm to the outer side of the record.

References Cited (Backward Citations)

GB1176130A Cited
GB1302408A Cited
US3823946A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1981-10-02 1982-04-03 1982-10-03 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1985-10-02 1986-04-03 1986-10-03 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1989-10-02 1990-04-03 1990-10-03 $7700.00 Window Closed / Lapsed

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