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1. 发明专利

GB817481A Improvements in or relating to ionisation chambers 未知
公开(公告)号：GB817481A
公开(公告)日：1959-07-29
申请号：GB1902455
申请日：1955-07-01
申请人： COLE E K LTD , ROBERT GORDON DAVIS
IPC分类号： H01J47/02
摘要： 817,481. Ionization chambers. COLE Ltd., E. K., and DAVIS, R. G. July 2, 1956 [July 1, 1955], No. 19024/55. Class 39(1). An ionization chamber, for use in conjunction with a source of beta radiation, made from aluminium or other material of equal or lower atomic number and provided with a window for the entry of radiation has its inner surface which is exposed to radiation coated or lined with lead or lead paint. A coating of red-lead may be painted on the surface or metallic lead may be sprayed on. Alternatively a layer of lead foil may be used. The layer is preferably of slightly greater than semi-infinite thickness, i.e. half the minimum thickness which will prevent the passage therethrough of any beta radiation. The chamber is rectangular in form or may have curved walls to increase the ionization due to back-scattering of the radiation inside the chamber. The coating or lining has the effect of increasing the output of the chamber.

2. 发明专利

GB790319A Improvements in or relating to containers for radioactive materials 未知
公开(公告)号：GB790319A
公开(公告)日：1958-02-05
申请号：GB967155
申请日：1955-04-02
申请人： COLE E K LTD , ROBERT GORDON DAVIS
IPC分类号： G21G4/06
摘要： 790,319. Containers for radioactive materials. COLE, Ltd., E'. K., and DAVIS, R. G. April 3, 1956 [April 2, 1955], No. 9671/55. Class 98(1) A sealed container for radio-active material is of laminated construction, a plate A (Figs. 1 and 3), being formed as a shallow metal tray with a wide peripheral flange, wherein the material is placed, and which is covered by a second metal plate H of similar dimensions having an aperture I for a window of metallic foil J hermetically sealed to the plate on the side facing the tray A, the plates being secured closely together and hermetically sealed without obscuration of the window by sealing compound, and absorbing radiation from the material except in a direction through the window. A third plate C, having an aperture L corresponding to the window aperture may be placed between the tray A and plate H. The radioactive material may be sealed in a silver foil package B which is placed in the tray A and held in place by a wire ring D, e.g. of aluminium. Plate C is placed over the package B and screwed to tray A, after which plate H is screwed to tray A. Plate C is slightly smaller than plate H, so that a channel is formed between the edges of tray A and plate H and is filled with a sealing compound, which is also applied to the screws before insertion. Assembly must be carried out at least in part by remote-controlled means. A shield may be inserted in aperture L to shield the material until plate C has been screwed to the tray. A warning device is impressed on the underside of tray A. For storage or transit, the window is covered by a plate M held in place by straps N fastened to tray A by screws which do not pass completely through the tray and which therefore need not be treated with sealing compound.

3. 发明专利

CA26219A CLOTHES RACK 未知
公开(公告)号：CA26219A
公开(公告)日：1887-03-12
申请号：CA26219D
申请人： GORDON DAVIS D , KISTLER HIRAM W
发明人： GORDON DAVIS D

4. 发明专利

GB817593A Improvements in or relating to beta ray measuring gauges 未知
公开(公告)号：GB817593A
公开(公告)日：1959-08-06
申请号：GB1722155
申请日：1955-06-15
申请人： COLE E K LTD , ROBERT GORDON DAVIS
IPC分类号： G01N23/08 , H01J47/02
摘要： 817,593. Ionization chambers. COLE, Ltd., E. K., and DAVIS, R. G. June 14, 1956 [June 15, 1955], No. 17221/55. Class 39(1). Two ionization chambers are combined in a single unit in such a way as to be maintained at substantially the same temperature. In the arrangement shown, two chambers 11 and 12 are formed by polarizing electrodes 6 and 7 supported by an insulating wall 8 and surrounded by a common collector electrode 9 which provides a continuous thermal conduction path between the chambers. Fins 13 and 14 of sheet metal brazed or soldered to the electrodes 6 and 7 extend into a central opening in the wall 8 to increase the heat exchange between the chambers and a space 15, Fig. 3, above and below the wall 8 allows air or other gas to flow from one chamber to the other. The electrodes 6 and 7 are made of sheet metal and are perforated except for the portions covering the opening in the wall 8, which portions are sufficiently thick to prevent beta radiation in one chamber from passing to the other. Collection of ions is improved by rods or tubes connected to the collector electrode 9 and passing axially through the polarizing electrodes 6 and 7. The chambers are supported by insulators 17 in an earthed metal container 16 which screens the chambers from draughts and local variations in temperature. Windows for the entry of radiation are provided in the container 16 and electrode 9, connection to these members being by way of a coaxial socket. Wander plug sockets are provided for connections to the polarizing electrodes 6 and 7. Both surfaces of the electrodes 6 and 7 and the inner surface of electrode 9 are preferably matt black while the outer surface of electrode 9 and the inner surface of the container 16 may be polished. to reduce the effect of local temperature variations.

5. 发明专利

GB812952A Improvements in or relating to apparatus for comparing the intensities of radiation from two radioactive sources 未知
公开(公告)号：GB812952A
公开(公告)日：1959-05-06
申请号：GB3217654
申请日：1954-11-06
申请人： COLE E K LTD , ROBERT GORDON DAVIS
IPC分类号： H01J47/02
摘要： 812,952. Radioactive particle testing apparatus. COLE Ltd., E. K., and DAVIS, R. G. Nov. 7, 1955 [Nov. 6, 1954], No. 32176/54. Class 40 (3). [Also in Group XL (a)] Comparison test apparatus using sources of particles, such as Beta particles, consists of two ionization chambers 2 and 3 mounted one on each side of an insulating wall 1. Means are provided supplying one chamber with a potential of (say) 200 volts and the other with a similar potential of opposite polarity. Aluminium foil windows 4 and 8 in the two chambers open respectively on to a guide 5 for the material under test (e.g. cigarette rod) and a housing 9 containing a standard sample. A radiation source 6 is,provided in conjunction with the guide 5 and a similar source 7 for housing 9. The two chambers 2 and 3 contain similar foraminous collectors 10 and 12 through each of which passes a perforated metal tube (16, 17) attached to the respective chamber walls. Screens 11 and 13, insulated from the collectors are connected together and earthed by connection to the outer braid of coaxial cable 14. Staggered openings are provided in the screens 11 and 13 and also a connecting opening in the wall 1. These openings permit the interconnection of the chambers whilst preventing radiation reaching one chamber passing to the other. The collectors 10 and 12 are joined together and also to an external measuring circuit through the centre conductor of cable 14.

6. 发明专利

GB814286A Back-scatter measuring gauges 未知
公开(公告)号：GB814286A
公开(公告)日：1959-06-03
申请号：GB1722055
申请日：1955-06-15
申请人： COLE E K LTD , ROBERT GORDON DAVIS
IPC分类号： G01N23/203
摘要： 814,286. Radiation thickness gauges. COLE Ltd., E. K., and DAVIS, R. G. June 14, 1956 [June 15, 1955], No. 17220/55. Class 40 (3). In a thickness measuring gauge of the type in which radiation from a radio-active source 2 is passed through a material 3 under test and is reflected or " back-scattered " back through the material by a backing plate 4 to an ionization chamber 5, means are provided for periodically inserting a plate 6 of known back-scatter properties between material 3 and the gauge to permit the utilization circuit (not shown) associated with ionization chamber to be adjusted to compensate for the effects of decay of the radio-active source or contamination by dust &c. Preferably the adjustment is effected automatically each time plate 6 is brought into position. The material of plate 6 is chosen to be of a higher atomic number than that of plate 4 such that the output of the ionization chamber, at the commencement of a measuring operation, with the standard plate in position, is equal to the chamber output in the absence of the standard plate and any material under test.

7. 发明专利

GB114245A Improvements in Vehicles Bodies. 未知
公开(公告)号：GB114245A
公开(公告)日：1918-03-28
申请号：GB930017
申请日：1917-06-28
申请人： H H BOBCOCK COMPANY , FRANCIS GORDON DAVIS
IPC分类号： B62D29/02
摘要： 114,245. Davis, F. G., and Babcock, Co., H. H. June 28, 1917. Bodies; vans and wagons.-The sides 2 of the body of a vehicle such as a motor lorry or van comprise lower side boards 19 which abut against the longitudinal edges of the base or platform 1, upper wings 20, and braces 21 bent laterally at 28 so as to extend across and between the wings and side boards and having their lower portions 25 bolted to the inner faces of the side boards 19 and their upper portions bolted to the outer faces of the wings 20. The upper portions of the braces are turned outwardly and downwardly and secured by bolts 26 to the side boards 19. The platform 1 is supported on longitudinal sills 6, a rabbeted end bar 7 and intermediate cross-bars 8, and the edges of the platform 1 and the ends of the bars 8 are embraced between flanged extensions 27 of the lower portions 25 of the braces 21 and angle-plates 22 at the lower outer edges of the side boards 19. Additional reinforcing- plates 30, 31 are secured to the outer sides of the boards 19, the plates 31 terminating in flanges 32 attached to connecting plates 33, through which, and through the angle-plates 22, bolts 24 pass. A roof 5 supported from the wings 20 by uprights 4 and a rear board 3 hinged about removable pintles 37 and secured by catches 39, 40, are provided.

8. 发明专利

GB814890A Improvements in or relating to apparatus using a radioactive material and an ionisation chamber 未知
公开(公告)号：GB814890A
公开(公告)日：1959-06-17
申请号：GB789355
申请日：1955-03-18
申请人： COLE E K LTD , ROBERT GORDON DAVIS
IPC分类号： H01J17/32 , H01J47/02
摘要： 814,890. Ionization chambers. COLE Ltd., E. K., and DAVIS, R. G. March 19, 1956 [March 18, 1955], No. 7893/55. Class 39(1). An ionization chamber 1 with a foraminous collector electrode 3 and a rod or tube 4 within the collector electrode for collecting ions formed in the space within the collector electrode is enclosed by an air-tight container 20, and air or other suitable gas is injected into the container under pressure through a releasable valve 14, or through a pinch which is permanently sealed. Radiation passes into the container 20 through a window 16. The window may consist of aluminium foil backed by pressure pads 17 of aluminium strip sleeved with rubber. The ionization chamber 1 has a window 2 of metal foil on wire mesh.

9. 发明专利

GB814718A Improvements in or relating to means for the detection of radiation employing an ionisation chamber 未知
公开(公告)号：GB814718A
公开(公告)日：1959-06-10
申请号：GB655155
申请日：1955-03-05
申请人： COLE E K LTD , ROBERT GORDON DAVIS
IPC分类号： G01T1/185 , H01J47/02
摘要： 814,718. Detecting radiation. COLE Ltd., E. K., and DAVIS, R. G. June 4, 1956 [March 5, 1955], No. 6551/55. Class 40 (3). [Also in Group XL (a)] An ionization chamber 7 for detecting radiation is formed with a pair of collector electrodes 13, 14, which are connected to the input of a push-pull amplifier 6, and includes deflecting electrodes 8 and 9 energized from an oscillator 10 whereby the ions may be deflected back and forth between electrodes 13 and 14 to produce an A.C. signal directly from the chamber. A cone-shaped auxiliary electrode 12 serves to shield the collector electrodes from the deflecting electrodes. Potentiometer 11 permits the potential of electrode 12 to be adjusted for focusing. The other potentiometer permits the mean position of the ion beam to be adjusted relative electrodes 13 and 14. The output from amplifier 6 is applied to operate an indicator via a phase-sensitive detector which also receives a signal from oscillator 10. Reference is made to the use of a sealed chamber filled with argon and a chamber open to the atmosphere. Electromagnetic deflection means may be employed in place of the electrostatic deflecting electrodes shown.

10. 发明专利

GB811494A Improvements in or relating to apparatus using a radioactive material and an ionisation chamber 未知
公开(公告)号：GB811494A
公开(公告)日：1959-04-08
申请号：GB3261854
申请日：1954-11-11
申请人： COLE E K LTD , ROBERT GORDON DAVIS
IPC分类号： H01J47/02
摘要： 811,494. Ionization chambers. COLE Ltd., E. K., and DAVIES, R. G. Nov. 11, 1955 [Nov. 11, 1954], No. 32618/54. Class 39(1). An ionization chamber for use in conjunction with a radioactive source comprises a collector electrode permeable by beta radiation and within the chamber, a metal wall to said chamber, and a metal-body extending within said collector electrode and electrically connected with said wall. The chamber shown is formed by a sheet metal box 1 mounted on an insulating base 2, e.g. of thermosetting resin and provided with a window 5, e.g. of aluminium foil to admit beta rays emitted by a source 6 and passing through material under test which is fed through a guide 7. The collector electrode 3, which is of square cross-section, is stamped out of sheet metal, is bolted to the base 2, and is insulated by ceramic bushes from a guard plate 4 which is earthed when the chamber is in use. The collector electrode 3 is perforated to render it permeable by beta radiation or may be of other foraminous construction such as a mesh, or may be of thin metallic foil. A metal rod or tube 8, which may be perforated as shown, is secured and electrically connected to the wall of the chamber at 9 and extends inside the collector electrode 3 to enable ions formed within the collector electrode to be collected.

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