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1. 发明专利

GB721667A Improvements in or relating to vapour vacuum pumps 未知
公开(公告)号：GB721667A
公开(公告)日：1955-01-12
申请号：GB327650
申请日：1950-02-08
申请人： EDWARDS & CO LONDON LTD W , DOUGLAS LATHAM , BASIL DIXON POWER
IPC分类号： F04F9/00
摘要： 721,667. Condensation pumps. EDWARDS & CO., (LONDON), Ltd., W., LATHAM, D., and POWER, B. D. July 16, 1951.. [Feb. 8, 1950] No. 3276/50. Class 71. A vapour vacuum pump in which vapour ejected from one or more jets 4, 5, 8 supplied directly from the boiler of the pump is condensed on a surface 2, a portion of the surface is heated to effect vapourization from the thin liquid film flowing down said surface, of the more volatile fractions of the film, which vapour is used to feed one or more additional jets 8 of the pump. The vapour condensed on the surface of the pump casing 2, which may be air or water cooled, passes through the narrow annulus A-B between the casing and the skirt tube 7. The region B-C of the casing is heated by conduction from the boiler, supplemented if necessary by an external heater, and it may also be provided with radiation shield to conserve the heat. When the condensed liquid reaches B the more volatile constituents are evaporated and are fed through an annular duct 11 to the jet 8 which discharges into a mixing tube 9 leading to a pipe 10 connected to a rotary backing pump. The volatile vapours may condense in a trough 14 and be drawn off through a tap 15. The jet 8 will tend to entrain and remove from the space 13 any high vapour pressure fractions which remain therein and will also produce in the space 13 a sufficiently low partial pressure of air for degassing the fluid film on its way to the annulus A-B. In other embodiments the vapour produced from the heated surface is used to feed both jets 4, 8, or the jet 8 may be omitted and one or more annular jets, such as 4 are then supplied with the vapour.

2. 发明专利

GB700978A Improvements in or relating to vapour vacuum pumps 未知
公开(公告)号：GB700978A
公开(公告)日：1953-12-16
申请号：GB200650
申请日：1950-01-25
申请人： EDWARDS & CO LONDON LTD W , BASIL DIXON POWER
IPC分类号： F04F9/00
摘要： 700,978. Injectors. EDWARDS & CO. (LONDON), Ltd., W., and POWER, B. D. July 18, 1951 [Jan. 25,1950], No. 2006/50. Class 71. Access of liquid splashed from the boiler 1, Fig. 2, of a vapour vacuum pump and of liquid deposited on the wall 11 to a jet 12 is impeded by means e.g., a baffle 24 and a barrier 23 in the path of the vapour stream from the boiler 1 to the working jet 12. In a modification a baffle disc is disposed immediately below the inturned rim of the vapour tube, and in a further modification two semi-circular baffles are vertically spaced with diametrical edges overlapping. The baffle disc 26, Fig. 3, may also be disposed at the vapour inlet end of the vapour tube 28 which is of less diameter than the disc 26; the barrier being an inverted conical member 27 extending from the tube 28.

3. 发明授权

US3943330A Method and apparatus for electrically heating a fluid 失效
标题翻译：电加热流体的方法和装置
公开(公告)号：US3943330A
公开(公告)日：1976-03-09
申请号：US445421
申请日：1974-02-25
申请人： James Francis Pollock , Peter Douglas Dunn , Graham Rice , Basil Dixon Power
发明人： James Francis Pollock , Peter Douglas Dunn , Graham Rice , Basil Dixon Power
IPC分类号： F22B1/28 , F04F9/00 , F24H1/10 , H01L39/04 , H05B3/14
CPC分类号： H05B3/145 , F04F9/00 , F24H1/101
摘要： Fluid heating arrangements and methods are provided wherein liquid is caused to flow through a fluid permeable electrical resistance heater body. Prior to the heater body, the liquid passes through a fluid permeable flow control member which offers a uniform resistance to the entire flow of the liquid. Static pressure head of the fluid varies over the entry surface of the flow control member, and the permeability of the combination of the heater body and the flow control member are such as to cause a pressure drop in the fluid greater than the variations in static pressure head of the fluid at the entry surface of the flow control member. This promotes a uniform flow of the fluid through the heater body even in the presence of significant differences in static pressure head over the fluid entry surface of the flow control member. The permeability of the flow control member may be such that the pressure drop across the flow control member alone is greater than the variation in the static pressure head of the fluid over the entry surface of the flow control member.
摘要翻译：提供流体加热装置和方法，其中使液体流过流体可渗透的电阻加热器主体。在加热器体之前，液体通过流体可渗透的流量控制构件，其对液体的整个流动提供均匀的抵抗力。流体的静压头在流量控制构件的入口表面上变化，并且加热器主体和流量控制构件的组合的渗透性使得流体中的压降大于静压力的变化在流动控制构件的进入表面处的流体的头部。即使在流动控制构件的流体入口表面上的静压头存在显着差异的情况下，这也促进流体通过加热器主体的均匀流动。流量控制构件的渗透性可以使得单独流动控制构件上的压降大于流体控制构件入口表面上的流体的静压头的变化。

4. 发明专利

GB784447A Improvements in or relating to vapour vacuum pumps 未知
公开(公告)号：GB784447A
公开(公告)日：1957-10-09
申请号：GB1931455
申请日：1955-07-04
申请人： EDWARDS HIGH VACUUM LTD , BASIL DIXON POWER
IPC分类号： F04F9/04
摘要： 784,447. High vacuum diffusion pumps. EDWARDS HIGH VACUUM, Ltd., and POWER, B. D. June 28, 1956 [July 4, 1955], No. 19314/55. Class 71. Prevention of migration of oil vapour through the mouth of a high vacuum diffusion pump 1 when the vessel 2 to be evacuated is disconnected therefrom and the pump mouth is open to atmosphere is effected by drawing a low velocity air current into the mouth of the pump, the base of which is connected to a backing pump 3 through a narrow bore tube 7 by-passing the closed electromagnetic valve 5 in the normal connecting duct 4. A vapour trap 6 is located between the pumps 1 and 3. Alternatively the air flow may be maintained by a controlling valve between the pumps 1 and 3 or by means of a small auxiliary pump. Specification 748,376 is referred to.

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