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US3873913A Expired / Lapsed US ⏱️ 0.0 years remaining

Shock resistant magnetic detector cores

Assignee: United States Department of the Navy
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Filing: 1962-03-30
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Granted: 1975-03-25
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Expires: 1982-03-30
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Abstract

Abstract 1. In a magnetometer, an open-ended cylindrical tube composed of a non-magnetic material and having an opening in the longitudinal sidewall thereof substantially closer to one of the open ends of the tube than to a point midway along the length of the longitudinal sidewall of the tube, a scroll-wound core composed of high permeability magnetic material disposed within said tube substantially equidistant from the ends of said tube and substantially centrally thereof, said core having a deformed portion therein in registration with said opening, and a securing means within said opening adhering to the walls thereof and in anchor-like engagement with said deformed portion, whereby the scroll-wound core is secured to the tube in a zone of decreased magnetic sensitivity at a point of anchorage providing enhanced resistance to impact breakage of said tube.

Inventors

  • 👤 Arthur W Obenschain

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 23:04
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/02

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 134 words
In a magnetometer, an open-ended cylindrical tube composed of a non-magnetic material and having an opening in the longitudinal sidewall thereof substantially closer to one of the open ends of the tube than to a point midway along the length of the longitudinal sidewall of the tube, a scrollwound core composed of high permeability magnetic material disposed within said tube substantially equidistant from the ends of said tube and substantially centrally thereof, said core having a deformed portion therein in registration with said opening, and a securing means within said opening adhering to the walls thereof and in anchor-like engagement with said deformed portion, whereby the scroll-wound core is secured to the tube in a zone of decreased magnetic sensitivity at a point of anchorage providing enhanced resistance to impact breakage of said tube.
Claim 2
Dependent Claim 134 words
In a magnetometer, an open-ended cylindrical tube composed of a non-magnetic material and having an opening in the longitudinal sidewall thereof substantially closer to one of the open ends of the tube than to a point midway along the length of the longitudinal sidewall of the tube, a scrollwound core composed of high permeability magnetic material disposed within said tube substantially equidistant from the ends of said tube and substantially centrally thereof, said core having a deformed portion therein in registration with said opening, and a securing means within said opening adhering to the walls thereof and in anchor-like engagement with said deformed portion, whereby the scroll-wound core is secured to the tube in a zone of decreased magnetic sensitivity at a point of anchorage providing enhanced resistance to impact breakage of said tube.

References Cited (Backward Citations)

US2219107A Cited
US2722734A Cited
US2981885A Cited
US3076930A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-03-24 1978-09-23 1979-03-25 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-03-24 1982-09-23 1983-03-25 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-03-24 1986-09-23 1987-03-25 $7700.00 Window Closed / Lapsed

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