US3979637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microchannel plates and method of making same
Assignee: American Optical Corp
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Filing: 1971-11-08
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Granted: 1976-09-07
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Expires: 1991-11-08
Abstract
Abstract Microchannel electron-multiplying plates formed of large numbers of glass-clad glass fibers all bundled tightly together in side-by-side relationship with each other and having their core sections removed for producing electron multiplying channels through the plates. Each channel has an electrically semi-conductive inner wall surrounded by an electrical insulating glass for preventing cross-talk of electrical energy between electron multiplying channels of the plates when the plates are in use.
Inventors
- 👤 Walter P. Siegmund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:32
CPC Classifications
H; H01; H01J; H01J43/00; H01J43/04; H01J43/06; H01J43/18; H01J43/24; H01J43/246; C; C03; C03B; C03B37/00; C03B37/10; C03B37/14; C03B37/15; H01J31/00; H01J31/08; H01J31/50; H01J31/506; H01J31/507
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
107 words
A multichannelled structure comprising; a plate formed of at least two differently characterized glasses intimately bonded together by fusion; a first of said glasses being at least partially conductive to electrical energy and comprising a multiplicity of individually spaced apart parallel tubular components each of substantial wall thickness, the opening internally of each tubular component forming a channel through said plate; and a second of said glasses being an electrical insulating glass, said second glass comprising the structure of a web of interconnected sections, one section encircling each tubular component with substantially less thickness of glass than said wall thickness of said tubular component in each case.
Claim 2
Dependent Claim
107 words
A multichannelled structure comprising; a plate formed of at least two differently characterized glasses intimately bonded together by fusion; a first of said glasses being at least partially conductive to electrical energy and comprising a multiplicity of individually spaced apart parallel tubular components each of substantial wall thickness, the opening internally of each tubular component forming a channel through said plate; and a second of said glasses being an electrical insulating glass, said second glass comprising the structure of a web of interconnected sections, one section encircling each tubular component with substantially less thickness of glass than said wall thickness of said tubular component in each case.
Claim 3
Dependent Claim
18 words
A device according to claim 1 wherein said electrically conductive glasses of said parallel tubular components contain lead.
Claim 4
Dependent Claim
19 words
The device according to claim 2 wherein said leadcontaining glasses are comprised of from 50 to 60 percent lead.
Claim 5
Dependent Claim
16 words
The device according to claim 2 wherein said second electrical insulating glass is a soda-lime glass.
Claim 6
Dependent Claim
58 words
A device according to claim 1 wherein said first glasses of said parallel tubular components occupy approximately 55 percent of a unit cross-sectional area of said plate, said second glass occupies approximately 5 percent of said cross-sectional area and the remainder of said cross-sectional area is comprised of the spaces of inner diametral openings through said tubular components.
Claim 7
Independent Claim
127 words
The method of making a microchannel plate comprising the steps of: assembling a plurality of relatively long and thin elements of glass each having a core of a removable glass, a first relatively thick cladding of a lead-containing glass and a second relatively thin cladding of an electrical insulating glass, all such elements being placed in parallel side-by-side relationship with each other; heating and fusing said elements together as a unit with glasses of said second claddings forming an interconnected web structure surrounding each of said first claddings; removing said cores of said elements from the fused unit leaving said first claddings as walls of channels extending therethrough; and subjecting the thus channelled unit to a reducing atmosphere for rendering surfaces of said walls semi-conductive to electricity.
Claim 8
Independent Claim
127 words
The method of making a microchannel plate comprising the steps of: assembling a plurality of relatively long and thin elements of glass each having a core of a removable glass, a first relatively thick cladding of a lead-containing glass and a second relatively thin cladding of an electrical insulating glass, all such elements being placed in parallel side-by-side relationship with each other; heating and fusing said elements together as a unit with glasses of said second claddings forming an interconnected web structure surrounding each of said first claddings; removing said cores of said elements from the fused unit leaving said first claddings as walls of channels extending therethrough; and subjecting the thus channelled unit to a reducing atmosphere for rendering surfaces of said walls semi-conductive to electricity.
Claim 9
Dependent Claim
31 words
The method according to claim 6 including the step of drawing said assembled plurality of elements to reduced cross-sectional size prior to said step of removing said cores of said elements.
Claim 10
Dependent Claim
22 words
The method according to claim 7 further including the step of cutting said drawn plurality of elements transaxially into relatively thin sections.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-07 | 1980-03-08 | 1980-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-07 | 1984-03-08 | 1984-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-07 | 1988-03-08 | 1988-09-07 | $7700.00 | Window Closed / Lapsed |