Patent US4376328A successfully refreshed from Google Patents.
US4376328A
Expired / Lapsed
US
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Method of constructing a gaseous laser
Assignee: Coherent Inc
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Filing: 1981-05-04
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Granted: 1983-03-15
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Expires: 2001-05-04
Abstract
Abstract A method of making a gaseous laser is disclosed using a thin-walled, ceramic tube such as alumina. Heat conducting members are assembled and aligned in a spaced-apart relationship within the tube. Coaxially aligned cylindrical shields are affixed to the heat-conducting members to control gas pumping within the tube. Bore-defining aperatures in the heat-conducting members, or in sputter-resistant discs affixed to the heat-conducting members, are aligned by a mandrel under tension at which time the parts are permanently bonded within the tube.
Inventors
- 👤 Wayne S. Mefferd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:58
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/02; H01S3/03
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
64 words
A method of fabricating a gaseous laser discharge tube comprising: assemblying a plurality of spaced-apart heat-conducting members, each having a discharge defining central aperture generally aligned with the tube axis, within and in contact with an electrically-insulating tube; tensioning a mandrel provided through the central apertures to bring the central apertures into exact alignment; and permanently securing the heat-conducting members to the electrically-insulating tube.
Claim 2
Independent Claim
64 words
A method of fabricating a gaseous laser discharge tube comprising: assemblying a plurality of spaced-apart heat-conducting members, each having a discharge defining central aperture generally aligned with the tube axis, within and in contact with an electrically-insulating tube; tensioning a mandrel provided through the central apertures to bring the central apertures into exact alignment; and permanently securing the heat-conducting members to the electrically-insulating tube.
Claim 3
Dependent Claim
18 words
The method of claim 1 wherein said securing step comprises brazing the heat-conducting members to the electrically-insulating tube.
Claim 4
Dependent Claim
28 words
The method of claim 2 wherein the assembly step includes the additional step of inserting brazing material between the heat-conducting members and the electrically-insulating tube prior to brazing.
Claim 5
Dependent Claim
23 words
The method of claim 3 wherein the brazing step is accomplished by baking the entire tube assembly while the mandrel is in tension.
Claim 6
Dependent Claim
15 words
The method of claim 4 wherein the baking step occurs with the mandrel vertically oriented.
Claim 7
Dependent Claim
62 words
The method of claim 2 wherein the assembly step includes the steps of: (a) forming cup-shaped members of a heat-conducting material; (b) inserting the cup-shaped members spaced-apart within the tube; (c) inserting brazing material between the cup-shaped members and the tube wall; and (d) expanding the cup rim into the interior wall of the tube to hold the cup-shaped members in place.
Claim 8
Dependent Claim
31 words
The method of claim 6 including the additional step of inserting discs of heat-resistant material having a bore-defining central aperture therein, within and in contact with each of the cup-shaped members.
Claim 9
Dependent Claim
18 words
The method of claim 6 wherein a brazing material is provided between the discs and the cup-shaped members.
Claim 10
Dependent Claim
27 words
The method of claim 8 wherein at least two cup-shaped members have discs bonded therein before inserting them within the tube to define a bore center line.
Claim 11
Dependent Claim
25 words
The method of claim 6 wherein the assembly step additionally includes forming a cylindrical shield ring coaxially as part of each of said cup-shaped members.
Claim 12
Dependent Claim
16 words
The method of claim 2 wherein the heat-conducting members are annealed before assemblying within the tube.
Claim 13
Dependent Claim
27 words
The method of claim 1 including the step of terminating one end of the laser tube with a cathode assembly and the other end with an anode.
Claim 14
Dependent Claim
24 words
The method of claim 12 wherein said anode is affixed within the tube by attaching it to the tube wall by additional heat-conducting members.
Claim 15
Dependent Claim
19 words
The method of claim 1 including the step of surrounding each of the central apertures with a sputter-resistant material.
References Cited (Backward Citations)
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US3619810A
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US3760213A
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-03-14 | 1986-09-13 | 1987-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-14 | 1990-09-13 | 1991-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-14 | 1994-09-13 | 1995-03-15 | $7700.00 | Window Closed / Lapsed |