US5156815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sublimating and cracking apparatus
Assignee: DLB TRUST
•
Filing: 1988-09-08
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Granted: 1992-10-20
•
Expires: 2008-09-08
Abstract
Abstract A sublimating and cracking device which may be used to produce a collimated beam of molecules from a solid source. The device includes an elongated sublimating tube and an elongated cracking tube adapted to be axially oriented off axis to each other. The sublimating and cracking tubes are interconnected and heated in use.
Inventors
- 👤 Ben G. Streetman
- 👤 Terry J. Mattord
- 👤 Craig W. Farley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:36
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/22; C23C14/24; C23C14/243; C30; C30B; C30B23/00; C30B23/02; C30B23/06; C30B23/066
Claims Analysis
Total Claims: 42
Claim 1
Independent Claim
161 words
A device for sublimating and cracking a source material comprising: an elongated sublimating tube adapted to be axially oriented in a first direction, the sublimating tube having a discharge end; an elongated cracking tube adapted to be axially oriented in a second direction off axis to the first direction, the cracking tube having a charge end and a discharge end; means for interconnecting the discharge end of the sublimating tube and the charge end of the cracking tube; means for heating the sublimating tube to a temperature sufficient to sublimate a source material; means for heating the cracking tube to a temperature sufficient to crack said source material; and control means for monitoring and regulating the temperature in the elongated sublimating tube and in the elongated cracking tube so that a temperature is held sufficient to sublime but not crack the source material in the elongated sublimating tube and held sufficient to crack the source material in the elongated cracking tube.
Claim 2
Independent Claim
161 words
A device for sublimating and cracking a source material comprising: an elongated sublimating tube adapted to be axially oriented in a first direction, the sublimating tube having a discharge end; an elongated cracking tube adapted to be axially oriented in a second direction off axis to the first direction, the cracking tube having a charge end and a discharge end; means for interconnecting the discharge end of the sublimating tube and the charge end of the cracking tube; means for heating the sublimating tube to a temperature sufficient to sublimate a source material; means for heating the cracking tube to a temperature sufficient to crack said source material; and control means for monitoring and regulating the temperature in the elongated sublimating tube and in the elongated cracking tube so that a temperature is held sufficient to sublime but not crack the source material in the elongated sublimating tube and held sufficient to crack the source material in the elongated cracking tube.
Claim 3
Dependent Claim
24 words
The device of claim 1, wherein the interconnecting means includes a shutter for selectively opening and closing the charge end of the cracking tube.
Claim 4
Dependent Claim
30 words
The device of claim 1, wherein the sublimating tube is adapted to be axially oriented in a substantially horizontal position during use regardless of the angle of the cracking tube.
Claim 5
Dependent Claim
20 words
The device of claim 1, wherein the cracking tube is adapted to be connected substantially perpendicularly to the sublimating tube.
Claim 6
Dependent Claim
32 words
The device of claim 1, wherein the cracking tube includes a thermal sinking zone adjacent the charge end and a primary cracking zone distal from the charge end of the cracking tube.
Claim 7
Dependent Claim
33 words
The device of claim 5, wherein the cracking tube heating means is located to provide direct heat to the primary cracking zone but not to the thermal sinking zone of the cracking tube.
Claim 8
Dependent Claim
21 words
The device of claim 1, wherein the cracking tube heating means are arranged to provide radial heating to the cracking tube.
Claim 9
Dependent Claim
21 words
The device of claim 1, wherein the sublimating tube heating means are arranged to provide radial heating to the sublimating tube.
Claim 10
Dependent Claim
21 words
The device of claim 7, wherein the cracking tube heating means comprise an expanded metal mesh filament surrounding the cracking tube.
Claim 11
Dependent Claim
21 words
The device of claim 8, wherein the sublimating tube heating means comprise an expanded metal mesh filament surrounding the sublimating tube.
Claim 12
Dependent Claim
26 words
The device of claim 3, wherein the sublimating tube heating means comprise an expanded metal mesh filament to embrace a lower portion of the sublimating tube.
Claim 13
Dependent Claim
19 words
The device of claim 9, 10 or 11, further comprising an insulating tube surrounding the expanded metal mesh filament.
Claim 14
Dependent Claim
25 words
The device of claim 7, further comprising a heat shield arrangement including a plurality of radially spaced heat shields surrounding the cracking tube heating means.
Claim 15
Dependent Claim
40 words
The device of claim 6, further comprising a heat shield arrangement including a plurality of radially spaced heat shields surrounding the cracking tube heating means, the thermal sinking zone of the cracking tube being unshielded by the heat shield arrangement.
Claim 16
Dependent Claim
26 words
The device of claim 13, wherein the radially spaced heat shields comprise coaxial tubes, and the heat shield arrangement includes means for spacing the coaxial tubes.
Claim 17
Dependent Claim
21 words
The device of claim 1, wherein the control means includes a thermocouple attached to the cracking tube proximate its axial midpoint.
Claim 18
Dependent Claim
25 words
The device of claim 1, wherein the control means includes a thermocouple attached to the cracking tube proximate the charge end of the cracking tube.
Claim 19
Dependent Claim
21 words
The device of claim 1, wherein the cracking tube is threaded at its charge end for coupling to the interconnecting means.
Claim 20
Dependent Claim
21 words
The device of claim 1, wherein the sublimating tube is threaded at its discharge end for coupling to the interconnecting means.
Claim 21
Dependent Claim
16 words
The device of claim 1, further comprising means for vacuum pumping the interior of the device.
Claim 22
Dependent Claim
20 words
The device of claim 1, further comprising cooling means to surround the interconnecting means and the sublimating tube heating means.
Claim 23
Dependent Claim
29 words
The device of claim 21, wherein the cooling means comprise means for circulating a coolant fluid in surrounding relationship to the interconnecting means and the sublimating tube heating means.
Claim 24
Dependent Claim
24 words
The device of claim 22, wherein the fluid circulating means comprise a jacket to surround the interconnecting means and the sublimating tube heating means.
Claim 25
Dependent Claim
24 words
The device of claim 22, wherein the fluid circulating means comprise a coil to surround the interconnecting means and the sublimating tube heating means.
Claim 26
Dependent Claim
13 words
The device of claim 1, wherein the sublimating tube comprises a refractory material.
Claim 27
Dependent Claim
13 words
The device of claim 1, wherein the cracking tube comprises a refractory material.
Claim 28
Dependent Claim
13 words
The device of claim 1, wherein the interconnecting means comprise a refractory material.
Claim 29
Dependent Claim
12 words
The device of claim 2, wherein the shutter comprises a refractory material.
Claim 30
Dependent Claim
23 words
The device of claim 25, 26, 27 or 28, wherein the refractory material is molybdenum, rhenium, tantalum, tungsten, platinum, or pyrolytic boron nitride.
Claim 31
Dependent Claim
14 words
The device of claim 29, wherein the refractory material is molybdenum, rhenium, or tantalum.
Claim 32
Dependent Claim
11 words
The device of claim 30, wherein the refractory material is molybdenum.
Claim 33
Dependent Claim
16 words
The device of claim 9, 10 or 11 wherein the expanded metal mesh filament comprises tantalum.
Claim 34
Dependent Claim
13 words
The device of claim 12, wherein the insulating tube comprises pyrolytic boron nitride.
Claim 35
Dependent Claim
13 words
The device of claim 13 or 14, wherein the heat shields comprise tantalum.
Claim 36
Dependent Claim
14 words
The device of claim 15, wherein the coaxial tubes and spacing means comprise tantalum.
Claim 37
Dependent Claim
20 words
The device of claim 1, further comprising a housing enclosing the sublimating tube, interconnecting means and sublimating tube heating means.
Claim 38
Dependent Claim
11 words
The device of claim 36, wherein the housing comprises stainless steel.
Claim 39
Dependent Claim
113 words
A furnace for producing a collimated beam of molecules from a solid source comprising an elongated sublimating section and an elongated cracking section arranged off axis in relation to the elongated sublimating section, said sublimating and cracking sections including means for heating a solid source to a temperature sufficient to sublimate and crack said source, respectively, and the furnace further comprising a controller for monitoring and regulating the temperature in the elongated sublimating section and in the elongated cracking section so that a temperature is held sufficient to sublime but not crack the source material in the elongated sublimating section and held sufficient to crack the source material in the elongated cracking section.
Claim 40
Dependent Claim
113 words
A furnace for producing a collimated beam of molecules from a solid source comprising an elongated sublimating section and an elongated cracking section arranged off axis in relation to the elongated sublimating section, said sublimating and cracking sections including means for heating a solid source to a temperature sufficient to sublimate and crack said source, respectively, and the furnace further comprising a controller for monitoring and regulating the temperature in the elongated sublimating section and in the elongated cracking section so that a temperature is held sufficient to sublime but not crack the source material in the elongated sublimating section and held sufficient to crack the source material in the elongated cracking section.
Claim 41
Independent Claim
194 words
A device for sublimating and cracking a source material comprising: an elongated sublimating tube made of a refractory material, the sublimating tube being adapted to be axially oriented in a substantially horizontal position during use regardless of the angle of the cracking tube, and having a discharge end; an elongated cracking tube made of a refractory material, the cracking tube being adapted to be axially oriented off axis to the sublimating tube and having a charge end and a discharge end; an elbow made of a refractory material for interconnecting the discharge end of the sublimating tube and the charge end of the cracking tube; means for radially heating a lower portion of the sublimating tube to a temperature sufficient to sublimate a source material; means for radially heating the cracking tube to a temperature sufficient to crack some source material; and control means for monitoring and regulating the temperature in the elongated sublimating tube and in the elongated cracking tube so that a temperature is held sufficient to sublime but not crack the source material in the elongated sublimating tube and held sufficient to crack the source material in the elongated cracking tube.
Claim 42
Independent Claim
194 words
A device for sublimating and cracking a source material comprising: an elongated sublimating tube made of a refractory material, the sublimating tube being adapted to be axially oriented in a substantially horizontal position during use regardless of the angle of the cracking tube, and having a discharge end; an elongated cracking tube made of a refractory material, the cracking tube being adapted to be axially oriented off axis to the sublimating tube and having a charge end and a discharge end; an elbow made of a refractory material for interconnecting the discharge end of the sublimating tube and the charge end of the cracking tube; means for radially heating a lower portion of the sublimating tube to a temperature sufficient to sublimate a source material; means for radially heating the cracking tube to a temperature sufficient to crack some source material; and control means for monitoring and regulating the temperature in the elongated sublimating tube and in the elongated cracking tube so that a temperature is held sufficient to sublime but not crack the source material in the elongated sublimating tube and held sufficient to crack the source material in the elongated cracking tube.
References Cited (Backward Citations)
US2440135A
Cited
US2793609A
Cited
US3153137A
Cited
US3434894A
Cited
US3547074A
Cited
US3662154A
Cited
US3916034A
Cited
US3974002A
Cited
US4181544A
Cited
US4137865A
Cited
US4286545A
Cited
US4179312A
Cited
US4239955A
Cited
US4385946A
Cited
US4392453A
Cited
US4426569A
Cited
US4543467A
Cited
US4607152A
Cited
US4648347A
Cited
US4553022A
Cited
US4518846A
Cited
US4777022A
Cited
US4699083A
Cited
US4646680A
Cited
US4748315A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-10-20 | 1996-04-20 | 1996-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-20 | 2000-04-20 | 2000-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-20 | 2004-04-20 | 2004-10-20 | $7700.00 | Window Closed / Lapsed |