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This patent was reissued on Jan. 11, 1977 as patent
USRE29113
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 Title: |
US3865997:
TRIANGULAR PIEZOELECTRIC TRANSDUCER FOR RECORDING VIDEO INFORMATION
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Halter, Jerome Barth; 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: |
1975-02-11
/ 1973-04-16
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| Application Number: |
US1973000351599
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| IPC Code: |
Advanced:
G11B 3/44;
G11B 3/46;
H04R 1/16;
Core:
G11B 3/00;
H04R 1/00;
IPC-7:
G11B 3/00;
H01V 7/00;
H04R 17/04;
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| U.S. Class: |
Current:
369/144;
310/326;
310/328;
310/341;
310/367;
369/170;
G9B/003.076;
G9B/003.078;
Original:
179/100.41P;
178/006.6A;
178/066.6B;
179/100.4C;
310/008.2;
310/008.3;
310/009.5;
310/009.6;
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| Field of Search: |
179/100.4 C,100.41 P,100.41 B
274/034,46 B
178/6.6 B,6.6 A,6.6 DD
310/9.6,9.5
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| Priority Number: |
| 1972-04-19 |
GB1972000018039 |
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| Abstract: |
A cutterhead assembly suitable for forming a topographic signal-representative pattern in a recording medium such as a disc is constructed with non-parallel external surfaces so as to provide a response relatively free of undesired resonant modes over a relatively wide frequency range. The cutterhead includes a cutting stylus supported in a stylus mount. The stylus mount and therefore the stylus are driven by a piezoelectric element which is mounted on a supporting pedestal. A resilient mounting means is utilized to fasten the supporting pedestal to a mounting bracket.
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| Attorney, Agent or Firm: |
Whitacre, Eugene M. ;
Siegel, Stephen ;
Meagher, William ;
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| Primary / Asst. Examiners: |
Cook, Daryl W.; Moore, David K.
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| INPADOC Legal Status: |
None
Family Legal Status Report
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| Family: |
Show 4 known family members
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First Claim:
Show all 14 claims |
1. Apparatus for providing displacement of a cutting stylus in response to electrical signals and adapted for mounting to a bracket comprising:
- a pedestal having first and second opposing sides of different surface area;
- a cutting stylus;
- a stylus mount having a base region and adapted for receiving said cutting stylus;
- a piezoelectric element having first and second opposing sides, said first side of said element adjacent to and rigidly coupled to a first side of said pedestal and said second side of said element adjacent to and rigidly coupled to said base region of said stylus mount, said pedestal, piezoelectric element, and stylus mount forming a structure having all external surfaces disposed anti-parallel to each other;
- means for providing electrical signals to said piezoelectric element; and
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 10 U.S. patent(s) that reference this one
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