Method of and means for detecting variations in wall thickness of metal tubes
Номер патента: GB836635A
Опубликовано: 09-06-1960
Автор(ы): Bernard Edward Noltingk
Принадлежит: TI Group Services Ltd
Опубликовано: 09-06-1960
Автор(ы): Bernard Edward Noltingk
Принадлежит: TI Group Services Ltd
Реферат: 836,635. Electric tests. T.I. (GROUP SERVICES) Ltd. Sept. 2, 1958 [June 6, 1957], No. 18017/57. Class 37. The eccentricity of the bore of a tube 1 is determined by coils inside the tube generating fields which are detected by diametricallyopposite coils outside. As shown, coils A, A 1 , mounted on a support 3, enter the bore of the tube and are spaced from its walls by pins 6. Aligned with the coils A, A<SP>1</SP> are external coils B, B 1 , the spacing of which relative to the outside of the tube is determined by pins 5. Each coil B, B 1 is in two parts, B 1 , B2 and B 1 <SP>1</SP>, B 2 <SP>1</SP> respectively. The parts are so designed that the change in voltage in each part is the same if the coil moves away from coil A, although the absolute valve of these voltages differ. Thus, the effect of variation in the distance between coils A and B cancels out. The connections are shown in Fig. 3. Oscillator O feeds tuned coils A, A 1 and phasesensitive detector D. The two parts of each of coils B, B 1 (i.e. B 1 , B 2 and B 1 <SP>1</SP>, B 2 <SP>1</SP>) are mounted in opposition as are the coils themselves. The difference of output representing the eccentricity of the bore is amplified at P, fed to phase-sensitive detector D and indicated at M.
Sheet of colloidal crystals immobilized in resin, method of displaying structural color using same, method for detecting unevenness distribution or hardness distribution of subject using same, and structural color sheet
Номер патента: US09970850B2. Автор: Tsutomu Sawada,Satoshi Kawanaka,Fumio Uchida,Hiroshi Fudoji,Seiichi Furumi. Владелец: Fuji Chemical Co Ltd. Дата публикации: 2018-05-15.