US4075527A — X-ray detector

Claim 1

Independent Claim 173 words

A radiation detector comprising: means having walls defining a cavity for being filled with ionizable gas, radiation permeable window means disposed in one of said walls, a plurality of spaced apart conductive electrode members and insulating members interposed between said conductive electrode members and all of said members being arranged adjacent each other in a predetermined order in said cavity, some of said electrode members cooperating with adjacent electrode members to define gas filled ionization cells, said cells being arranged for radiation that passes through said window to enter said cells, adhesive material disposed between and on selected adjacent portions of said members, said adhesive material being deposited on limited areas of said members and with sufficient thickness to space said members nonuniformly initially, said adhesive material having the property of yielding when said members are arranged and subjected to compression to thereby establish the desired total thickness and interspacing dimensions of said plurality of members and having the property of subsequently solidifying to bond said members together and thereby maintain said dimensions.

Claim 2

Dependent Claim 173 words

A radiation detector comprising: means having walls defining a cavity for being filled with ionizable gas, radiation permeable window means disposed in one of said walls, a plurality of spaced apart conductive electrode members and insulating members interposed between said conductive electrode members and all of said members being arranged adjacent each other in a predetermined order in said cavity, some of said electrode members cooperating with adjacent electrode members to define gas filled ionization cells, said cells being arranged for radiation that passes through said window to enter said cells, adhesive material disposed between and on selected adjacent portions of said members, said adhesive material being deposited on limited areas of said members and with sufficient thickness to space said members nonuniformly initially, said adhesive material having the property of yielding when said members are arranged and subjected to compression to thereby establish the desired total thickness and interspacing dimensions of said plurality of members and having the property of subsequently solidifying to bond said members together and thereby maintain said dimensions.

Claim 3

Dependent Claim 19 words

The detector as in claim 1 wherein said adhesive material has the characteristic of solidifying when subjected to heat.

Claim 4

Dependent Claim 15 words

The detector as in claim 1 wherein said adhesive material is heat curable epoxy resin.

Claim 5

Dependent Claim 206 words

A radiation detector comprising: a stack of adjacent interfacing plate means including electrode plates having front and rear edges and insulating plates selectively disposed between said electrode plates, the size of said insulating plates being less than predetermined ones of said electrode plates so that said insulating plates contribute to creating a gap between said predetermined plates, adhesive material disposed between and on nominally contacting portions of said plates, said adhesive material being deposited on limited areas of said plates and with sufficient thickness to space said plates nonuniformly initially, said adhesive material having the property of yielding when said plates are adjacent each other and subjected to compression to thereby establish the desired interspacing and total thickness dimensions of said plurality of plate means and having the property of solidifying to bond said plate means together and maintain said dimensions, means having walls defining a cavity for being filled with ionizable gas, and a radiation permeable window disposed in one of said walls, said stack of plates being supported in said cavity with said front edges of said predetermined electrode plates disposed along said window and adjacent said window to enable radiation passing through said window to enter the gas filled gaps between said plates.

Claim 6

Dependent Claim 206 words

A radiation detector comprising: a stack of adjacent interfacing plate means including electrode plates having front and rear edges and insulating plates selectively disposed between said electrode plates, the size of said insulating plates being less than predetermined ones of said electrode plates so that said insulating plates contribute to creating a gap between said predetermined plates, adhesive material disposed between and on nominally contacting portions of said plates, said adhesive material being deposited on limited areas of said plates and with sufficient thickness to space said plates nonuniformly initially, said adhesive material having the property of yielding when said plates are adjacent each other and subjected to compression to thereby establish the desired interspacing and total thickness dimensions of said plurality of plate means and having the property of solidifying to bond said plate means together and maintain said dimensions, means having walls defining a cavity for being filled with ionizable gas, and a radiation permeable window disposed in one of said walls, said stack of plates being supported in said cavity with said front edges of said predetermined electrode plates disposed along said window and adjacent said window to enable radiation passing through said window to enter the gas filled gaps between said plates.

Claim 7

Dependent Claim 19 words

The detector as in claim 4 wherein said adhesive material has the characteristic of solidifying when subjected to heat.

Claim 8

Dependent Claim 15 words

The detector as in claim 4 wherein said adhesive material is heat curable epoxy resin.

Claim 9

Dependent Claim 194 words

A multi-cell radiation detector comprising: body means having walls defining a cavity and adapted for being filled with ionizable gas, radiation permeable window means disposed in one of said walls, an array of radiation detecting cells for being disposed in said cavity adjacent said window, said cells each including juxtaposed first and second metallic electrode plates having a gap between them and selectively arranged insulating plates and third metallic plates disposed between said first and second electrode plates to create said gap, said third plates being insulated from said first and second plates, said first and second plates being directed toward said window to enable radiation permeating said window to pass between said first and second plates, adhesive material disposed selectively between said plates for bonding said plates of a cell and adjacent cells together to form said array, at least some of said third plates having support means which are engageable to support said array in said body while maintaining said first and second electrode plates in electrically isolated relationship relative to said body, and means for making electrical connections between said first and second electrodes within said body to the outside thereof.

Claim 10

Dependent Claim 194 words

A multi-cell radiation detector comprising: body means having walls defining a cavity and adapted for being filled with ionizable gas, radiation permeable window means disposed in one of said walls, an array of radiation detecting cells for being disposed in said cavity adjacent said window, said cells each including juxtaposed first and second metallic electrode plates having a gap between them and selectively arranged insulating plates and third metallic plates disposed between said first and second electrode plates to create said gap, said third plates being insulated from said first and second plates, said first and second plates being directed toward said window to enable radiation permeating said window to pass between said first and second plates, adhesive material disposed selectively between said plates for bonding said plates of a cell and adjacent cells together to form said array, at least some of said third plates having support means which are engageable to support said array in said body while maintaining said first and second electrode plates in electrically isolated relationship relative to said body, and means for making electrical connections between said first and second electrodes within said body to the outside thereof.

Claim 11

Dependent Claim 42 words

The detector as in claim 7 including: base means constructed and arranged for being engageable on said body and means mounted to said base means for engaging with said support means to thereby support said array of cells from said base means.

Claim 12

Dependent Claim 16 words

The detector as in claim 7 wherein: said base means comprises a cover for said cavity.

Claim 13

Dependent Claim 51 words

The detector as in claim 8 wherein: said base means comprises a cover, said cover having a surface adapted for being disposed on said body to enclose said body, gasket means interposed between said cover and body, and means for pressing said cover onto said body to effect a seal therewith.

Claim 14

Dependent Claim 18 words

The detector as in claim 10 wherein said gasket means is a closed loop of soft copper wire.

Claim 15

Dependent Claim 71 words

The detector as in claim 7 wherein: said first and second electrode plates have corresponding edges which are spaced from said walls of said body adjacent said window when said array of cells is disposed in said cavity, at least some of said third plates having portions extending therefrom beyond said edges and into contact relationships with said wall means to thereby provide further support for said array in said cavity.

Claim 16

Dependent Claim 32 words

The detector as in claim 7 wherein the thickness and distribution of said adhesive material is such that said plate means are angulated on radii, respectively, emanating from a substantially common point.

Claim 17

Dependent Claim 41 words

The detector as in claim 7 wherein the thickness and distribution of said adhesive material is such that said array of cells has a curvature and said first and second plates of each cell define the same acute angle between them.

Claim 18

Dependent Claim 38 words

The detector as in claim 7 wherein the thickness and distribution of said adhesive material is such that the first and second electrode plates of all in said array of cells are in substantial parallelism with each other.

Claim 19

Dependent Claim 201 words

A radiation detector comprising: a body having walls defining an elongated cavity, a radiation permeable window in one of said walls, cover means engageable with said body to sealingly enclose said cavity for containing ionizable gas, said cover having a plurality of electric lead-throughs therein, an array of radiation detector cells and means for mounting said array on said cover means for being disposed adjacent said window in said cavity when said cover means is engaged, said cells in said array comprising: juxtaposed first and second electrode plates having a gap between them and selectively arranged insulating plates and third metallic plates disposed between said first and second plates to create said gap, said first and second plates having edges for being disposed adjacent said window and said plates being directed toward said window to enable radiation permeating said window to pass into said gap, adhesive material disposed selectively between said plates for bonding said plates of a cell and adjacent cells together to form said array and compensate for thickness variations in said plates, and lead-through means in said cover means for making electrical connections between said first and second electrode plates inside of said body to the outside thereof.

Claim 20

Dependent Claim 201 words

A radiation detector comprising: a body having walls defining an elongated cavity, a radiation permeable window in one of said walls, cover means engageable with said body to sealingly enclose said cavity for containing ionizable gas, said cover having a plurality of electric lead-throughs therein, an array of radiation detector cells and means for mounting said array on said cover means for being disposed adjacent said window in said cavity when said cover means is engaged, said cells in said array comprising: juxtaposed first and second electrode plates having a gap between them and selectively arranged insulating plates and third metallic plates disposed between said first and second plates to create said gap, said first and second plates having edges for being disposed adjacent said window and said plates being directed toward said window to enable radiation permeating said window to pass into said gap, adhesive material disposed selectively between said plates for bonding said plates of a cell and adjacent cells together to form said array and compensate for thickness variations in said plates, and lead-through means in said cover means for making electrical connections between said first and second electrode plates inside of said body to the outside thereof.

Claim 21

Dependent Claim 54 words

The detector as in claim 16 wherein: said means for mounting said array to said cover means comprises means fastened to said cover means and engaged only with predetermined ones of said third plate means while remaining in electrical isolation from said first and second electrode plate means due to said interposed insulating plates.

Claim 22

Dependent Claim 126 words

The detector as in claim 16 wherein said third plate means are characterized as guard electrodes disposed between opposed insulating plates in each cell and said insulating plates in each cell and said insulating plates being disposed between opposed first and second electrode plates in each cell, said guard electrodes being for operating at the same potential as said body of said detector, certain of said guard electrodes having foot means integral therewith and extending therefrom, metallic strip means substantially coextensive with said array of cells and disposed on a side thereof opposite of said window, said foot means being fastened to said stop means and said strip means being mounted to said cover means to provide means for mounting said array to said cover means.

Claim 23

Dependent Claim 51 words

The detector as in claim 18 wherein: at least some of said guard electrode plate means have portions extending beyond the edges of said first and second electrodes which are adjacent said window means, said portions making contact with said wall means to thereby further support said array in said cavity.

Claim 24

Dependent Claim 62 words

The detector as in claim 16 wherein: said cavity is a curved channel of sufficient length to accommodate said array and the amount and distribution of said adhesive material is such as to dispose the plates of said cells at similar acute angles to produce a curve in said array wherein said plates coincide with radii emanating substantially from a common point.

Claim 25

Dependent Claim 22 words

The detector as in claim 16 wherein said cavity is filled with the ionizable gas xenon at least 25 atmospheres of pressure.

Claim 26

Independent Claim 124 words

A method of making a multi-cell radiation detector comprising the steps of: selecting metallic electrode members and insulating members which are to be arranged in nominal contacting relation to form a cell, depositing viscous and yieldable adhesive material on selected areas of said electrodes and insulating members which are intended to interface, stacking said members for said viscous material to engage, pressing the stack so formed to cause said viscous material to flow until the desired overall thickness of the stack is obtained, allowing said viscous material to solidify to thereby bond said members together, anchoring said stack of bonded members in a container which has a radiation permeable window for allowing radiation to enter the cells, and filling said container with ionizable gas.

Claim 27

Independent Claim 124 words

A method of making a multi-cell radiation detector comprising the steps of: selecting metallic electrode members and insulating members which are to be arranged in nominal contacting relation to form a cell, depositing viscous and yieldable adhesive material on selected areas of said electrodes and insulating members which are intended to interface, stacking said members for said viscous material to engage, pressing the stack so formed to cause said viscous material to flow until the desired overall thickness of the stack is obtained, allowing said viscous material to solidify to thereby bond said members together, anchoring said stack of bonded members in a container which has a radiation permeable window for allowing radiation to enter the cells, and filling said container with ionizable gas.

Claim 28

Independent Claim 246 words

A method of making a multi-cell detector array which is comprised of a stack of metallic plates and insulating plates between them wherein it is desired to establish accurately the overall thickness dimension of the stack, comprising the steps of: depositing viscous and yieldable adhesive material to selected portions of plates which constitute a cell, stacking said plates of a cell in a form that defines the shape of said stack and that allows said adhesive material to engage said insulating plates and metallic plates, then when a predetermined number of cells have been assembled in said form, pressing the stack of cells to cause said adhesive material to flow and enable said stack to acquire the desired overall thickness dimension of said predetermined number of cells, allowing said viscous material to solidify to thereby bond said cells into a unit, depositing additional viscous and yieldable adhesive material on the ends of a plurality of such units, placing said units adjacent each other in a form and pressing them together to cause said adhesive material between adjacent ends to flow and enable the units to acquire the desired overall thickness dimension of the plurality of units, allowing said viscous material between said units to solidify to thereby bond said units and form a unitary stack of cells, anchoring said unitary stack of cells in a container which has a radiation permeable window for allowing radiation to enter said cells, and filling said container with ionizable gas.

Claim 29

Independent Claim 246 words

A method of making a multi-cell detector array which is comprised of a stack of metallic plates and insulating plates between them wherein it is desired to establish accurately the overall thickness dimension of the stack, comprising the steps of: depositing viscous and yieldable adhesive material to selected portions of plates which constitute a cell, stacking said plates of a cell in a form that defines the shape of said stack and that allows said adhesive material to engage said insulating plates and metallic plates, then when a predetermined number of cells have been assembled in said form, pressing the stack of cells to cause said adhesive material to flow and enable said stack to acquire the desired overall thickness dimension of said predetermined number of cells, allowing said viscous material to solidify to thereby bond said cells into a unit, depositing additional viscous and yieldable adhesive material on the ends of a plurality of such units, placing said units adjacent each other in a form and pressing them together to cause said adhesive material between adjacent ends to flow and enable the units to acquire the desired overall thickness dimension of the plurality of units, allowing said viscous material between said units to solidify to thereby bond said units and form a unitary stack of cells, anchoring said unitary stack of cells in a container which has a radiation permeable window for allowing radiation to enter said cells, and filling said container with ionizable gas.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1981-02-20	1981-08-22	1982-02-21	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1985-02-20	1985-08-22	1986-02-21	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1989-02-20	1989-08-22	1990-02-21	$7700.00	Window Closed / Lapsed

X-ray detector

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