US3586788A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of fabricating magnetic heads and the components therefor
Assignee: Shared Technologies Fairchild Telecom Inc
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Filing: 1968-10-07
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Granted: 1971-06-22
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Expires: 1988-10-07
Abstract
Abstract A magnetic erase head formed by providing a housing having a bottom, side and end walls. The housing has integrally formed therein structural members operative to positively position and retain the transducing apparatus in a predetermined position after it has been placed therein. These structural members, in accordance with the preferred embodiment of this invention, comprise converging sections of the sidewalls which form a necked-down slot into which the core, separator and pole segments are tightly positioned. After the transducing apparatus is so positioned, the panlike housing is poured full of potting compound. The imperforate nature of the housing prevents the compound from leaking and, consequently, it may be poured full and thereafter permitted to solidify in any convenient place. Subsequent to solidification of the potting compound, the forward wall of the housing and a portion of the pole pieces utilized in the positioning process are removed by grinding or the like to form the pole faces.
Inventors
- 👤 Leo W Page
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:42
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/147; G11B5/10; G11B5/105; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49021; Y10T29/49032; Y10T29/49036; Y10T29/49041
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
204 words
A method of fabricating a magnetic transducer head having the steps of: preforming from plastic material as an integral piece a housing having at least a bottom, two sidewalls and one end wall, the sidewalls converging at a point spaced from said one end wall to form a necked-down slot having generally parallel boundaries and having a width approximately equal to the core, pole and separator segments to be positioned therein; placing a terminal member at the end of said housing opposite from said one end such that said terminal member, base, sidewalls and one end wall form a generally fluidtight, panlike receptacle having a generally open top; positioning within said housing magnetic transducing components with the core, pole and separator segments thereof oriented toward said one end wall, said positioning step including the step of squeezing said pole, core and separator segments tightly together and forcing them into said slot; pouring said panlike receptacle with the transducing components positioned therein full of liquid potting compound; permitting said compound to solidify; and removing at least portions of said one end wall, said sidewalls and said solidified compound therebehind to expose a portion of said slot and the core, separator and pole segments positioned therein.
Claim 2
Independent Claim
204 words
A method of fabricating a magnetic transducer head having the steps of: preforming from plastic material as an integral piece a housing having at least a bottom, two sidewalls and one end wall, the sidewalls converging at a point spaced from said one end wall to form a necked-down slot having generally parallel boundaries and having a width approximately equal to the core, pole and separator segments to be positioned therein; placing a terminal member at the end of said housing opposite from said one end such that said terminal member, base, sidewalls and one end wall form a generally fluidtight, panlike receptacle having a generally open top; positioning within said housing magnetic transducing components with the core, pole and separator segments thereof oriented toward said one end wall, said positioning step including the step of squeezing said pole, core and separator segments tightly together and forcing them into said slot; pouring said panlike receptacle with the transducing components positioned therein full of liquid potting compound; permitting said compound to solidify; and removing at least portions of said one end wall, said sidewalls and said solidified compound therebehind to expose a portion of said slot and the core, separator and pole segments positioned therein.
Claim 3
Dependent Claim
38 words
The method as set forth in claim 1 wherein said placing step includes the step of inserting a terminal board member having exposed terminals into one extremity of said housing to form one of the end walls thereof.
Claim 4
Dependent Claim
31 words
The method as set forth in claim 1 which further comprises the step of positioning a cover over said open top subsequent to pouring said compound but prior to solidification thereof.
Claim 5
Dependent Claim
118 words
A housing member for utilization in the fabrication of a magnetic transducing head including parallel pole, core and separator segments, said member being adapted to become an integral component of the head and comprising a panlike housing having a base, upstanding sidewalls and end walls, said base and walls forming a generally fluidtight, panlike receptacle having an open top, said sidewalls converging at a point spaced from said end walls to form a necked-down slot having generally parallel boundaries and having a width equal approximately to the width of said pole, core and separator segments whereby said segments can be positioned within said slot to position them with respect to said housing during potting of said transducing head.
Claim 6
Dependent Claim
118 words
A housing member for utilization in the fabrication of a magnetic transducing head including parallel pole, core and separator segments, said member being adapted to become an integral component of the head and comprising a panlike housing having a base, upstanding sidewalls and end walls, said base and walls forming a generally fluidtight, panlike receptacle having an open top, said sidewalls converging at a point spaced from said end walls to form a necked-down slot having generally parallel boundaries and having a width equal approximately to the width of said pole, core and separator segments whereby said segments can be positioned within said slot to position them with respect to said housing during potting of said transducing head.
Claim 7
Dependent Claim
45 words
The member as set forth in claim 4 wherein portions of the upper surfaces of said sidewalls are recessed to accommodate a cover plate positioned thereon subsequent to insertion of said components within said member and the filling of said member with said potting compound.
Claim 8
Dependent Claim
47 words
The member as set forth in claim 4 wherein said base, sidewalls and one of said end walls are integrally molded from plastic material and wherein said other end wall comprises a terminal strip sealed to said integrally molded sidewalls and base to form said panlike receptacle.
Claim 9
Dependent Claim
53 words
The member as set forth in claim 6 which further comprises forward and rear pole and core piece platforms affixed to said base and forming a bobbin depression therebetween and integrally molded therewith, said platforms being adapted to support pole and core piece portions at opposite extremities of a winding bobbin positioned thereover.
Claim 10
Dependent Claim
45 words
The member as set forth in claim 4 which further comprises a magnetic transducer assembly having its pole pieces positioned within said necked-down slot, the pole pieces diverging at either extremity of said necked-down slot to longitudinally position said transducer assembly within said housing member.
Claim 11
Dependent Claim
58 words
The member as set forth in claim 8 wherein the extremities of those sections of said sidewalls bounding said necked-down slot are connected by an enveloping end wall, said enveloping end wall being spaced from said necked-down slot a sufficient distance to permit said potting compound to flow thereinto after positioning of said magnetic components within said member.
Claim 12
Dependent Claim
55 words
The member as set forth in claim 9 wherein said sidewalls and the necked-down slot formed thereby are of greater height that the transducer assembly to be positioned therein whereby said potting compound can flow through said necked-down slot over said pole pieces into the space between said necked-down slot and said enveloping end wall.
Claim 13
Dependent Claim
39 words
The member set forth in claim 4 wherein one of said end walls comprises a terminal strip having means affixed thereto for the connection of said components to a signal source, said member including means for receiving said strip.
Claim 14
Dependent Claim
24 words
The member as set forth in claim 11 wherein the interior extremities of said sidewalls have grooves therein to slideably accommodate said terminal strip.
Claim 15
Dependent Claim
22 words
The member as set forth in claim 12 wherein said base also has a groove therein to slideably accommodate said terminal strip.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |