US3688056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic transducer heads
Assignee: Honeywell Inc
•
Filing: 1970-05-21
•
Granted: 1972-08-29
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Expires: 1990-05-21
Abstract
Abstract A high frequency ferrite magnetic transducer head sliced from a profiled glass bonded assembly contains a non-magnetic conductive spacer material uniformly disposed throughout the recording gap forming area.
Inventors
- 👤 Thomas D Wiseley
- 👤 Roy Rallis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:12
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/187; G11B5/23; G11B5/235; G11B5/232; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49021; Y10T29/49032; Y10T29/49055; Y10T29/49057
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
13 words
The magnetic head of claim 1 wherein said non-magnetic conductive spacer comprises Havar.
Claim 2
Independent Claim
192 words
A method of constructing a magnetic gap for magnetic transducing devices comprising the steps of: forming a first ferrite member to produce a first gap forming surface; forming a second member of ferrite to produce a second gap forming surface; assembling the first and second ferrite members so as to position said first and second gap forming surfaces in opposing relationship to each other to thereby form a gap; inserting a non-magnetic conductive spacer within the gap so as to lie between the first and second gap forming surfaces; orienting the non-magnetic conductive spacer within the gap so as to substantially fill the entire gap; introducing a molten glass bonding agent in the vicinity of the non-magnetic conductive spacer filled gap; wetting the gap area so as to cause the molten glass to flow between the non-magnetic conductive spacer and the first and second gap forming surfaces; and cooling the gap area so as to harden the glass bonding agent between the non-magnetic spacers and the first and second gap forming surfaces so as to thereby form a glass bond between the non-magnetic spacer and the first and second gap forming surfaces.
Claim 3
Dependent Claim
65 words
The method of claim 3 wherein said step of wetting the gap area comprises the steps of: wetting the surfaces of the non-magnetic conductive spacer which oppose the first and second gap forming surfaces; and wetting the first and second gap forming surfaces; and wherein said method further comprises the step of: filling the spaces which exist between the resultingly wetted surfaces with molten glass.
Claim 4
Dependent Claim
28 words
The method of claim 4 wherein said heating step furthermore comprises: heating the glass bondIng agent under pressure to a temperature within the range of 950* to 1,200*F.
Claim 5
Dependent Claim
22 words
The method of claim 5 wherein said cooling step furthermore comprises: cooling the gap area over a period of approximately ten hours.
Claim 6
Dependent Claim
12 words
The method of claim 6 wherein the non-magnetic conductive spacer comprises Havar.
Claim 7
Dependent Claim
18 words
The method of claim 6 wherein the spacer extends beyond the gap defined by the gap forming surfaces.
Claim 8
Dependent Claim
24 words
The method of claim 6 additionally comprising the step of: slicing the assembled first and second ferrite members to form individual magnetic transducing devices.
Claim 9
Dependent Claim
152 words
In a magnetic core assembly, having a transducing gap formed therein consisting of a pair of first and second forming surfaces; a method of filling the transducing gap comprising the steps of; inserting a non-magnetic conductive spacer within the gap so as to lie between the first and second gap forming surfaces; orienting the non-magnetic spacer within the gap so as to substantially fill the entire gap; introducing a molten glass bonding agent in the vicinity of the non-magnetic conductive spacer filled gap; wetting the gap area so as to cause the molten glass to flow between the non-magnetic conductive spacer and the first and second gap forming surfaces; and cooling the gap area so as to harden the glass bonding agent between the non-magnetic conductive spacer and the first and second gap forming surfaces so as to thereby form a glass bond between the non-magnetic spacers and the gap forming surfaces.
Claim 10
Dependent Claim
65 words
The method of claim 10 wherein said step of wetting the gap area comprises the steps of: wetting the surfaces of the non-magnetic conductive spacer which oppose the first and second gap forming surfaces; and wetting the first and second gap forming surfaces; and wherein said method further comprises the step of: filling the spaces which exist between the resultingly wetted surfaces with molten glass.
Claim 11
Dependent Claim
28 words
The method of claim 11 wherein said heating step furthermore comprises: heating the glass bonding agent under pressure to a temperature within the range of 950* to 1,200*F.
Claim 12
Dependent Claim
22 words
The method of claim 12 wherein said cooling step furthermore comprises: cooling the gap area over a period of approximately ten hours.
Claim 13
Dependent Claim
12 words
The method of claim 13 wherein the non-magnetic conductive spacer comprises Havar.
Claim 14
Dependent Claim
18 words
The method of claim 14 wherein the spacer extends beyond the gap defined by the gap forming surfaces.
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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) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |