Patent US3504182A successfully refreshed from Google Patents.
US3609615A
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US
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Adjustable ferrite cores
Assignee: Fair Rite Products
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Filing: 1970-05-21
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Granted: 1971-09-28
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Expires: 1990-05-21
Abstract
Abstract Two halves of a pot core permanently joined together by a mixture of a chemically setting adhesive material and deformable, preferably hollow, plastic type bubbles. The halves are held in position by a center screw which adjusts the parts against each other to a close tolerance fixed inductance while the gapping material therebetween cures, preferably at air or room temperature, the center screw (or outside clamps for C-cores or E-cores) may be removed after the two halves are permanently secured to each other.
Inventors
- 👤 Richard G Parker
- 👤 Bruce G Tolen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:09
CPC Classifications
H; H01; H01F; H01F17/00; H01F17/04; H01F17/043
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
16 words
A ferrite core as set forth in claim 1 wherein said material comprises an adhesive material.
Claim 2
Dependent Claim
15 words
A ferrite core as set forth in claim 1 wherein said material comprises epoxy resin.
Claim 3
Dependent Claim
17 words
A ferrite core as set forth in claim 1 wherein said bubbles are of a spherical configuration.
Claim 4
Dependent Claim
16 words
A ferrite core as set forth in claim 1 wherein said bubbles are uniform in size.
Claim 5
Dependent Claim
16 words
A ferRite core as set forth in claim 1 wherein said bubbles are nonuniform in size.
Claim 6
Dependent Claim
15 words
A ferrite core as set forth in claim 1 wherein said plastic-type bubbles are spheres.
Claim 7
Dependent Claim
19 words
A ferrite core as set forth in claim 1 wherein said gap is no greater than approximately 0.001 inch.
Claim 8
Dependent Claim
17 words
A ferrite core as set forth in claim 1 wherein said ferrite core is a pot core.
Claim 9
Dependent Claim
23 words
A ferrite core as set forth in claim 1 wherein the inductance of said core is proportional to the size of said gap.
Claim 10
Dependent Claim
50 words
A ferrite core as set forth in claim 10 including a central axial hole through each of said two sections, said hole for receiving a threaded center post and a threaded member attached to said center post for holding said two sections together while said material cures in said gap.
Claim 11
Dependent Claim
50 words
A ferrite core as set forth in claim 11 wherein said threaded post and threaded member are removable from said core after said material cures. 13 A ferrite core as set forth in claim 10 being provided with clamp means for holding said two sections together while said material cures.
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) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |