Gauge head assembly with non-magnetic insert
First Claim
Patent Images
1. A gauge head assembly comprising:
- a generally cylindrical body formed from a ferrous metal material having first and second ends with a first, axially extending annular recess formed in the first end thereof;
the body including a generally cylindrical sidewall having a threaded outer surface, the sidewall defining an axially extending passage opening into the first recess and extending through the body and the second end, the second end including a second, axially extending annular recess formed around the perimeter of the passage, the second annular recess defining a shoulder extending around the circumference of the passage at the second end of the body;
a tubular insert, the tubular insert having a cylindrical sidewall, a first closed end and a second open end, the tubular insert further comprising a collar extending radially outward at the second open end, wherein the tubular insert is disposed in the passage with the collar positioned in the second annular recess and the first closed end extending into the first annular recess, and wherein the tubular insert is permanently secured to the body with a gas-tight seal; and
wherein the tubular insert is formed from a substantially non-magnetic material.
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Abstract
A gauge head assembly for use with a magnetically actuated dial includes a cylindrical body formed from a magnetic material having a cylindrical sidewall with an threaded outer surface, wherein the sidewall defines an axially extending passage for receiving a tubular insert formed from a substantially non-magnetic material, the insert having a closed first end and a second open end with a collar extending radially outward at the second open end and wherein the insert is secured in the passage with the closed first end adjacent the first end of the body.
218 Citations
20 Claims
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1. A gauge head assembly comprising:
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a generally cylindrical body formed from a ferrous metal material having first and second ends with a first, axially extending annular recess formed in the first end thereof; the body including a generally cylindrical sidewall having a threaded outer surface, the sidewall defining an axially extending passage opening into the first recess and extending through the body and the second end, the second end including a second, axially extending annular recess formed around the perimeter of the passage, the second annular recess defining a shoulder extending around the circumference of the passage at the second end of the body; a tubular insert, the tubular insert having a cylindrical sidewall, a first closed end and a second open end, the tubular insert further comprising a collar extending radially outward at the second open end, wherein the tubular insert is disposed in the passage with the collar positioned in the second annular recess and the first closed end extending into the first annular recess, and wherein the tubular insert is permanently secured to the body with a gas-tight seal; and wherein the tubular insert is formed from a substantially non-magnetic material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A gauge head assembly for use with a magnetically actuated dial comprising:
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a generally cylindrical body formed from a ferrous metal material having first and second ends with a first axially extending annular recess formed in the first end thereof, the recess having an inwardly sloping wall configured to receive the magnetically actuated dial therein; the body including a generally cylindrical sidewall including a plurality of wrench flats formed adjacent the first end of the body and a threaded outer surface, wherein the sidewall defines an axially extending passage opening into the first recess and extending through the body and the second end, the second end including a second, axially extending annular recess formed around the perimeter of the passage, the second annular recess defining a shoulder extending around the circumference of the passage at the second end of the body; a tubular insert secured in the passage with a gas-tight seal, the insert having a cylindrical sidewall defining a magnet receiving chamber, a first closed end positioned in the first annular recess and a second open end, the insert further comprising a collar extending outward at the second open end, wherein the insert is secured in the passage with the collar abutting the shoulder in the second, axially extending annular recess and forming a gas-tight seal between the insert and the generally cylindrical body; and wherein the insert is formed from a substantially non-magnetic material. - View Dependent Claims (10, 11, 12, 13)
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14. A gauge head assembly comprising:
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a generally cylindrical body formed from a ferrous metal material having first and second ends with a first, axially extending recess formed in the first end thereof, the first recess having a first, sloping sidewall and a second, arcuate sidewall extending from the first sidewall; the body including a threaded outer surface and an axially extending passage opening into the first recess and extending through the body and the second end and a plurality of wrench flats formed adjacent the first end; a second, axially extending recess formed around the perimeter of the passage, the second annular recess defining an arcuate shoulder extending around the circumference of the passage at the second end of the body; a tubular insert secured in the passage, the insert formed from a substantially non-magnetic material and having a cylindrical sidewall, a first, domed-shaped closed end and a second open end, the insert further comprising a collar extending radially outward at the second open end, wherein the non-magnetic insert is permanently secured in the passage with the collar abutting the shoulder and the domed-shaped closed end extending into the first recess and wherein a gas-tight seal is formed between the tubular insert and the generally cylindrical body; and wherein the insert forms a window of low magnetic permeability through the gauge head assembly at the domed-shaped first end adjacent the first end of the generally cylindrical body of the gauge head assembly. - View Dependent Claims (15, 16, 17)
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18. A method of forming a gauge head assembly for use with a magnetic dial comprising:
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forming a gauge head of ferrous metal, the gauge head having a generally cylindrical body having a first and second ends, a passage extending therethrough with a first, axially extending annular recess formed in the first end thereof and a second, axially extending annular recess formed around the perimeter of the passage, the second annular recess defining a shoulder extending around the circumference of the passage at the second end of the body; forming a tubular stainless steel insert having a first closed end and a second open end, the second end defining a shoulder conforming to the profile of the shoulder in the second annular recess; annealing the insert; positioning the insert in the passage; and brazing the insert in the passage to form a gas-tight seal between the open end of the tubular insert and the body. - View Dependent Claims (19, 20)
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Specification