US4364816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Record matrix preparation
Assignee: QED Intellectual Property Ltd
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Filing: 1980-12-05
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Granted: 1982-12-21
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Expires: 2000-12-05
Abstract
Abstract An apparatus, for use in an electroplating arrangement, for establishing electrical contact with a metal or metalized cathode plate used in production of a disc record matrix. The apparatus includes an electrically conductive contact member and a clamping means for holding the contact member against a cathode plate supported by the apparatus. The contact member and clamping means are shaped so that electrical contact is established at the periphery only of the cathode plate.
Inventors
- 👤 David E. Birt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:16
CPC Classifications
C; C25; C25D; C25D17/00; C25D17/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
125 words
An electroplating arrangement comprising a metal or metalised cathode plate suitable for use in production of a disc record matrix, a current terminal located on an axis intersecting substantially the centre of said cathode plate and an electrically conducting annular contact member, a clamping means including a current distribution member, said clamping means being adapted to hold said contact member against said cathode plate, said current distribution member establishing a substantially uniform distribution of current from said terminal to the contact member, wherein the distribution member comprises a plurality of spaced electrical conductors, said conductors comprising an electrically conductive strip extending substantially radially from a common location on said axis and including an electrically conductive linkage member connecting each said strip to the contact member.
Claim 2
Dependent Claim
125 words
An electroplating arrangement comprising a metal or metalised cathode plate suitable for use in production of a disc record matrix, a current terminal located on an axis intersecting substantially the centre of said cathode plate and an electrically conducting annular contact member, a clamping means including a current distribution member, said clamping means being adapted to hold said contact member against said cathode plate, said current distribution member establishing a substantially uniform distribution of current from said terminal to the contact member, wherein the distribution member comprises a plurality of spaced electrical conductors, said conductors comprising an electrically conductive strip extending substantially radially from a common location on said axis and including an electrically conductive linkage member connecting each said strip to the contact member.
Claim 3
Dependent Claim
17 words
An arrangement according to claim 1 wherein the current distribution member is integral with the current terminal.
Claim 4
Dependent Claim
26 words
An arrangement according to claim 1 wherein the contact member comprises an annular ring including a plurality of integrally spaced lugs for contacting said linkage member.
Claim 5
Dependent Claim
50 words
An arrangement according to claim 3 wherein the clamping means comprises a first member for supporting a cathode plate, a generally annular second member adapted to be maintained against said first member, to surround a supported cathode, the first member including a resilient flange portion to overlie said contact member.
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) | 1985-12-20 | 1986-06-21 | 1986-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-20 | 1990-06-21 | 1990-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-20 | 1994-06-21 | 1994-12-21 | $7700.00 | Window Closed / Lapsed |