US3668343A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound playback device with improved coil spring pick-up arm
Assignee: Individual
•
Filing: 1970-01-30
•
Granted: 1972-06-06
•
Expires: 1990-01-30
Abstract
Abstract A phonograph has a pivoted pick-up arm and a switch comprising a first contact member protruding from said arm and arcuately movable over at least one second contact member. Operation of said switch actuates circuits for the function of auxiliary devices during playback.
Inventors
- 👤 Corrado Raffaeli
- 👤 Guiliana Somigli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:22
CPC Classifications
G; G11; G11B; G11B33/00; G11B33/02; G11B33/06; Y; Y10; Y10S; Y10S200/00; Y10S200/34
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
147 words
In a sound playback device for disc records, an improvement comprising, in combination, a pick-up arm having one end pivotally mounted on said device and having its other end disposed adjacent a rotatable record, a vibration pick-up head connected to said other end of said arm for contacting the record, sound reproducing means mounted in contact with said other end of said arm for producing sound in response to vibration of said pick-up head, a switch including a first contact fixed to said pick-up arm and a fixed second contact disposed for engagement by said first contact, a series connected load and potential source connected to said first and second contacts, whereby arcuate movement of said first contact upon pivotal movement of said pick-up arm during the playing of the record closes a circuit for said source and load when said first contact engages said second contact.
Claim 2
Dependent Claim
147 words
In a sound playback device for disc records, an improvement comprising, in combination, a pick-up arm having one end pivotally mounted on said device and having its other end disposed adjacent a rotatable record, a vibration pick-up head connected to said other end of said arm for contacting the record, sound reproducing means mounted in contact with said other end of said arm for producing sound in response to vibration of said pick-up head, a switch including a first contact fixed to said pick-up arm and a fixed second contact disposed for engagement by said first contact, a series connected load and potential source connected to said first and second contacts, whereby arcuate movement of said first contact upon pivotal movement of said pick-up arm during the playing of the record closes a circuit for said source and load when said first contact engages said second contact.
Claim 3
Dependent Claim
51 words
In a sound playback device for disc records as set forth in claim 8, the further improvement in which said first contact comprises a closely wound conductive wire coil connected at one end to said pick-up arM and having a free end for making resilient contact with said second contact member.
Claim 4
Dependent Claim
42 words
In a sound playback device for disc records as set forth in claim 9, a plurality of additional fixed contacts arranged in an arcuate path with said second contact and electrically connected thereto for successive engagement by said arcuately movable first contact.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |