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公开(公告)号：US3621418A
公开(公告)日：1971-11-16
申请号：US3621418D
申请日：1969-08-13
Applicant: COURTAULDS LTD
Inventor： BAKER BERNARD STUART
Abstract: A transducer comprising an electrical conductor located in the field of a permanent magnet or an electromagnet, whereby, by passing a current through the conductor, force will be caused to act between the conductor and the magnet, the transducer including a further electrical conductor connected in a circuit with the first-mentioned conductor so as to carry a current related to the current through the first-mentioned conductor and such as to tend to nullify the effect of that current to alter the field of the magnet linking the first-mentioned conductor. A transducer element is also claimed.
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公开(公告)号：US3482320A
公开(公告)日：1969-12-09
申请号：US3482320D
申请日：1967-07-21
Applicant: COURTAULDS LTD
Inventor： BAKER BERNARD STUART
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公开(公告)号：US3509760A
公开(公告)日：1970-05-05
申请号：US3509760D
申请日：1967-07-21
Applicant: COURTAULDS LTD
Inventor： BAKER BERNARD STUART
IPC: G01G23/36 , G01G23/365 , G01L1/08
CPC classification number: G01G23/36 , G01G23/365
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公开(公告)号：US3477286A
公开(公告)日：1969-11-11
申请号：US3477286D
申请日：1967-09-07
Applicant: COURTAULDS LTD
Inventor： BAKER BERNARD STUART
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Patent Agency Ranking
公开(公告)号：US3482439A
公开(公告)日：1969-12-09
申请号：US3482439D
申请日：1967-01-04
Applicant: COURTAULDS LTD
Inventor： BAKER BERNARD STUART
CPC classification number: G01N3/08 , G01N2203/0278
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公开(公告)号：GB1189127A
公开(公告)日：1970-04-22
申请号：GB3511066
申请日：1966-08-05
Applicant: COURTAULDS LTD
Inventor： BAKER BERNARD STUART
Abstract: 1,189,127. Electric extensometer. COURTAULDS Ltd. Aug. 4, 1967 [Aug. 5, 1966], No. 35110/66. Heading G1N. An extensometer producing a voltage proportional to length variations of a test article has the change in output voltage due to a selected percentage change in length, adjustable to a desired value. The end of a filament undergoing a tensile test is attached to the wiper 1 of a potentiometer RV1 which has potentials E1, E2 applied to its opposite ends, the potential E2 being controlled by amplifiers A2, A4 to produce zero voltage on the wiper when it is in a position 1b corresponding to the initial length of the filament, E2 being thereafter constant while the wiper follows extension of the filament (position 1c) and applies a voltage to a capacitor C2. The voltage of C2 is subsequently compared at 8, by changing over switch G1, with the potential of a wiper 9 of a second potentiometer RV2 driven by a motor which stops whenthe output of the comparator 8 is zero. The wiper 9 is coupled to an indicator drum calibrated in % extension. The filament is pretensioned to remove crimps, &c, thus moving wiper 1 from a position 1a to the starting position 1b the switch W1 being in the position shown to produce the value of E2 required to give zero volts on the wiper at 1b, the capacitor C1 serving to maintain the value of E2 when switch W1 is opened. A circuit A revives the potential E1 from a stabilized voltage E3 applied to the second potentiometer RV2, and a circuit B defines the output sensitivity of the potentiometer RV1, both circuits having adjustable resistors R1, R2, R3, R4 to vary the range and sensitivity of the extensometer.
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公开(公告)号：GB921743A
公开(公告)日：1963-03-20
申请号：GB4265360
申请日：1960-12-12
Applicant: COURTAULDS LTD
Inventor： AKHTAR MOHD , BETTS MAX WILLIAM , BAKER BERNARD STUART
Abstract: 921,743. Photometric measurements. COURTAULDS Ltd. Dec. 11, 1961 [Dec. 12, 1960], No. 42653/60. Class 40 (3). The invention relates to a beam-chopping device for use in photometric apparatus in which two light beams are compared, and comprises a beam chopper 5 connected to the shaft of a two-pole polarized rotor synchronous motor 2. With a beam chopper driven by such a motor it is possible to know continuously the precise angular position of the chopper. The device is used as shown in photometric apparatus in which light passing through a liquid reference 13 is compared with light passing through a sample solution 16, to determine a characteristic of the solution such as its concentration or constitution. A beam of light from a source 17 is directed to fall on the chopper which comprises a circular disc (Fig. II, not shown), one semi-circular segment of which has a mirror surface and the other is transparent, so that the beam is directed alternatively through the reference 13 and the sample 16. The beam after passing through the reference 15 is reflected by a mirror 14 and then passes through a light attenuator such as an optical wedge 24 on to a photo-electric cell 19 the output of which is passed through a condenser 20 to an amplifier 21, the amplified output being passed to the control winding 22 of a servomotor 23 which adjusts the position of the attenuator 24 through a gearing mechanism 25. When the beam has passed through the sample 16 it is reflected by a mirror 18 directly on to the photo-electric cell 19. The servomotor 23 adjusts the attenuator 24 so that the amount of light which falls on the photo-electric cell 19 after transmission through the reference 13 is the same as that which falls on the cell 19 after transmission through the sample, the position of the servomotor shaft being indicated by a recording voltmeter 29 fed from a potentiometer 27 the wiper arm of which is connected to the shaft of the servomotor. In order to facilitate initial setting up of the equipment the beam chopper motor 2 is adjustably mounted so that the angular position of its shaft relative to the chopper may be altered. This is of importance since in order that the servomotor 23 will position the attenuator correctly the waveform from the cell 19 to the control winding 22 must be substantially in phase or 180 degrees out of phase with the voltage applied to a condenser between a reference winding 26 of the servomotor and the supply to the motor 2. Specifications 677,942 and 778,505 are referred to.
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9.发明专利
公开(公告)号：GB908037A
公开(公告)日：1962-10-10
申请号：GB103860
申请日：1960-01-12
Applicant: COURTAULDS LTD
Inventor： ATKINS ARTHUR AMBROSE , BAKER BERNARD STUART , JESSOP WILLIAM NEIL
Abstract: A shaft, e.g. driving a cam 36 in a machine for producing artificial textile threads of varying denier (slub yarns), is caused to run at any of five different speeds according to which of five relays is energized, which is effected in random sequence by a two hundred position selector switch 34 driven from a 200:1 reduction worm drive 33. The sequence may be derived from random number tables, and preferably each relay is energized twice during each set of ten changes. The object is to ensure that the variations in denier of the yarn are sufficiently random to prevent "patterning" in material made from the yarn. By inserting various resistors the relay vary a reference voltage which may be used to control either the speed of an electric driving motor 31 in known manner or a slipping clutch driven by a constant speed motor. Each output speed differs by less than 20% from the mean. The apparatus may be used whenever a controlled change of speed is needed, such as for the production of fancy effects or cheese winding traverse drive. Specifications 813,857, 883,304 and 899,313 are referred to.
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公开(公告)号：GB1215602A
公开(公告)日：1970-12-16
申请号：GB2168867
申请日：1967-05-10
Applicant: COURTAULDS LTD
Inventor： BAKER BERNARD STUART
IPC: G01N3/08
Abstract: 1,215,602. Tensile testing machines. COURTAULDS Ltd. May 9, 1968 [May 10, 1967], No. 21688/67. Headings G1N and G1S. A method of carrying out a tensile test on a sample of filamentary material comprises the steps of:- (a) attacking the sample of filamentary material at two positions spaced along its length to the relatively movable upper and lower arms of a tensile testing machine, (b) causing relative movement of the arms towards each other to remove any tension in the sample thus enabling the initial load on the upper arm due to its mass and the mass of the sample to be measured, (c) causing relative movement of the arms away from each other to a position at which the sample is subjected to a predetermined tensile force measured by the load on the upper arm, to enable the initial length of the sample to be measured in terms of the separation of the arms, and (d) causing further relative movement of the arms away from each other to extend the sample until it breaks, at which position the separation of the arms is measured to determine the extension of the sample at breakage and the load on the upper arm is measured to determine the breaking load by subtraction of the initial load. The sample filament is mounted on a tape as described in Specification 1, 215, 601 and clamped between the arms as described in Specification 1, 215, 603. The initial load on a load cell to which the upper arm is attached is measured in terms of the voltage of an electrical signal generated by the load cell. The lower arm is then moved downwards to the point where a predetermined pretensioning load is applied to the sample and this point is determined electrically as described in Specification 1,189,125. Movement of the lower arm prior to pretensioning is accomplished at a progressively increasing speed controlled electrically as described in Specification 1, 199, 149. After pretension, the extension of the sample is continued until breakage occurs, the breakage point being determined electrically as described in Specification 1, 191, 286. Movement of the lower arm is then immediately stopped and the breaking load determined electrically as described in Specification 1, 189, 126. The percentage extension is also determined electrically as described in Specification 1, 189, 127 by means of a potentiometer connected to the lower arm. Apparatus as described in Specification 1, 200, 056 is used to test a number of samples to obtain an average result.
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