Patent US4198057A successfully refreshed from Google Patents.
US4198057A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Simplified record player
Assignee: OZEN CO Ltd
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Filing: 1979-02-07
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Granted: 1980-04-15
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Expires: 1999-02-07
Abstract
Abstract A record player having a tone arm which returns automatically to the starting point of sound reproduction, at which position the tone arm pushes down, by means of a spring for imparting a stylus force, a movable contact of a switch connected to a power source so as to move the movable contact blade away from engagement with a fixed electrical contact blade. The movable contact blade and the fixed contact blade are placed in vertically opposed relation with each other at the starting point, in the same direction as that of the stylus force. Thus, the fixed contact blade supports and moderates a downward movement of the tone arm.
Inventors
- 👤 Yasuyuki Miura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:48
CPC Classifications
G; G11; G11B; G11B33/00; G11B33/02; G11B33/06; G11B3/00; G11B3/001; G11B3/02; G11B3/10; G11B3/34; G11B3/40
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
329 words
A simplified record player comprising: a casing having a sound transfer member cantilever-mounted thereon; stylus force spring means resiliently cooperating with said sound transfer member; a tone arm pivotably mounted at one end thereof to said casing and having a pickup supported by the other end thereof said pickup being provided with a stylus; said tone arm being disposed under said sound transfer member; an upper face of said pickup being adapted to slidably contact the lower face of said sound transfer member; said stylus being adapted to be resiliently urged by said sound transfer member to engage with sound grooves of a record disc; a cam disposed substantially at the rotational center of said record disc; said cam cooperating with said sound transfer member to upwardly lift said sound transfer member when said pickup reaches the terminal point of sound reproduction of said record disc and to permit said stylus to disengage from said sound grooves and to return back to the starting point of sound reproduction; an electric power source and an electric motor for driving said record disc, said power source and said motor being connected by an electric circuit; a switch cooperating with said pickup so as to be opened by said pickup when said pickup returns to said starting point to interrupt an electrical connection in said electric current; said switch including a fixed contact and a movable contact disposed in substantially vertically opposed relation against each other substantially in the same direction as that of said stylus force; said movable contact and said tone arm operatively communicating with each other such that said tone arm is disposed above the upper face of said movable contact when said tone arm is returned to said starting point and said tone arm pushes said movable contact downwardly against a spring force, away from engagement with said fixed contact, so as to interrupt said electrical connection and moderate rapid impinging of said stylus on said record disc.
Claim 2
Dependent Claim
329 words
A simplified record player comprising: a casing having a sound transfer member cantilever-mounted thereon; stylus force spring means resiliently cooperating with said sound transfer member; a tone arm pivotably mounted at one end thereof to said casing and having a pickup supported by the other end thereof said pickup being provided with a stylus; said tone arm being disposed under said sound transfer member; an upper face of said pickup being adapted to slidably contact the lower face of said sound transfer member; said stylus being adapted to be resiliently urged by said sound transfer member to engage with sound grooves of a record disc; a cam disposed substantially at the rotational center of said record disc; said cam cooperating with said sound transfer member to upwardly lift said sound transfer member when said pickup reaches the terminal point of sound reproduction of said record disc and to permit said stylus to disengage from said sound grooves and to return back to the starting point of sound reproduction; an electric power source and an electric motor for driving said record disc, said power source and said motor being connected by an electric circuit; a switch cooperating with said pickup so as to be opened by said pickup when said pickup returns to said starting point to interrupt an electrical connection in said electric current; said switch including a fixed contact and a movable contact disposed in substantially vertically opposed relation against each other substantially in the same direction as that of said stylus force; said movable contact and said tone arm operatively communicating with each other such that said tone arm is disposed above the upper face of said movable contact when said tone arm is returned to said starting point and said tone arm pushes said movable contact downwardly against a spring force, away from engagement with said fixed contact, so as to interrupt said electrical connection and moderate rapid impinging of said stylus on said record disc.
Claim 3
Dependent Claim
27 words
A simplified record player according to claim 1, wherein: said movable contact is positioned so as to be pushed down by said pickup of said tone arm.
Claim 4
Dependent Claim
41 words
A simplified record player according to claim 1 or claim 2, wherein: a projection having a slant surface facing toward said starting point of sound reproduction is disposed above said movable contact and is adapted to push down said movable contact.
Claim 5
Dependent Claim
38 words
A simplified record player according to claim 1, wherein: said record player is of a record-changeable type wherein a face of said record disc having said sound grooves thereon is descended away from the sound reproducing position thereof.
Claim 6
Dependent Claim
14 words
A simplified record player according to claim 1, wherein: said record disc is unchangeable.
Claim 7
Dependent Claim
23 words
A simplified record player according to claim 1, wherein: said sound transfer member is integrally secured to a speaker of said record player.
Claim 8
Dependent Claim
46 words
A simplified record player according to claim 1, wherein: said sound transfer member is substantially separated from a speaker of said record player; and said sound transfer member is provided with a post extending upwardly therefrom into engagement with an interior peripheral portion of said speaker.
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) | 1983-04-15 | 1983-10-15 | 1984-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-15 | 1987-10-15 | 1988-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-15 | 1991-10-15 | 1992-04-15 | $7700.00 | Window Closed / Lapsed |