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 Title: |
US3843846:
DEMOUNTABLE CAPACITIVE PROTECTIVE COUPLING FOR PICKUP TRANSDUCERS
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Miller, Michael Evans; Indianapolis, IN
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| Assignee: |
RCA Corporation, New York, NY
other patents from RCA CORPORATION (466175) (approx. 7,929)
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| Published / Filed: |
1974-10-22
/ 1973-02-08
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| Application Number: |
US1973000330727
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| IPC Code: |
Advanced:
G11B 9/07;
Core:
G11B 9/00;
IPC-7:
G11B 9/06;
H04R 19/06;
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| U.S. Class: |
Current:
369/126;
369/244.1;
369/256;
G9B/009.023;
Original:
179/100.4M;
179/100.1B;
179/100.41G;
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| Field of Search: |
179/100.4 M,100.1 B,100.41 G,100.2 K,100.41 P,100.41 B
274/038
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| Priority Number: |
| 1973-02-08 |
US1973000330727 |
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| Abstract: |
To protect a playback stylus against excessive charge flow, a capacitor is provided in series circuit relationship with the electrode of the stylus assembly. The capacitor is formed of cooperating respective elements on the stylus assembly and a supporting tracking arm which are demountably intercoupled.
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| Attorney, Agent or Firm: |
Whitacre, Eugene M. ;
Hayes, J. B. ;
Meagher, William H. ;
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| Primary / Asst. Examiners: |
Konick, Bernard; Moore, David K.
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| Family: |
None
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First Claim:
Show all 4 claims |
What is claimed is:
1. In a system for effecting playback of a disc record having geometrical variations in spiral groove form on a major surface thereof, the combination comprising: an arm pivotally mounted at one end thereof, a stylus assembly including a conductive stylus electrode adapted for entry in said record groove; a first conductive member secured to an end of said arm remote from said one end; signal processing means electrically coupled between said first conductive member and a point of reference potential; a second conductive member secured to a segment of said stylus assembly remote from said stylus electrode and electrically coupled to said stylus electrode; said stylus assembly segment and said remote end of said arm subject to mechanical engagement in an operating relationship providing support for said stylus assembly by said arm during record playback, and subject to manual release from said engagement for facile disassembly of said arm and said stylus assembly; the mechanical engagement of said stylus assembly segment and said remote arm end in said operating relationship effecting a juxtaposition of said conductive members in a substantially parallel relationship of substantially fixed spacing; an electrical coupling of a direct current blocking character being provided between said stylus electrode and said signal processing means during record playback by a capacitance of substantially fixed value established between said conductive members, said coupling being provided without hindrance to said disassembly.
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| Background / Summary: |
Show background / summary
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| Drawing Descriptions: |
Show drawing descriptions
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| Description: |
Show description
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| Forward References: |
Show 10 U.S. patent(s) that reference this one
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