公开(公告)号：GB1189126A

公开(公告)日：1970-04-22

申请号：GB3510966

申请日：1966-08-05

Applicant: COURTAULDS LTD

Inventor： BAKER BERNARD STUART

IPC: G01G23/36 ,  G01G23/365

Abstract: 1,189,126. Measuring load electrically. COURTAULDS Ltd. Aug.4, 1967 [Aug. 5, 1966], No.35109/66. Heading G1N. The two outputs, for successive loads, of a load cell 1 are supplied to respective capacitors C1, C2 via a switch A1, the charges on the two capacitors being subsequently connected simultaneously to a comparator 6 by means of switches B1, B2; the switch B3, which earths capacitor C1 during charging, being connected to a potentiometer wiper 8 during the subsequent comparison. The potentiometer, is adjusted, preferably automatically by a motor which is energized when the switch B3 is changed over, and when the comparator 6 output is zero, the position of the wiper 8 indicates the load increase. The zero output of the comparator preferably stops the motor and causes a record to be printed of the wiper 8 position. The apparatus may be used to measure the stress, e.g. breaking stress, in filaments.

公开(公告)号：GB1189125A

公开(公告)日：1970-04-22

申请号：GB3510866

申请日：1966-08-05

Applicant: COURTAULDS LTD

Inventor： BAKER BERNARD STUART

IPC: G01N3/06 ,  G01N3/16 ,  G05D15/01

Abstract: 1,189,125. Tension measuring electrically. COURTAULDS Ltd. Aug. 4, 1966 [Aug. 5, 1966], No. 35108/66. Heading G1N In testing apparatus for stressing a filament 12 and comprising, for example, a load cell 1 to which the filament 12 is attached via a clamp 8, and a second clamp 9 applying tension to the filament under the action of a motor-driven threaded shaft 11, the initial tension is stored by a signal passed through a filter 2 and amplifier 3 to a capacitor C1, and a final desired tension is achieved by changing over switch contacts B1, B2, B3 so that a preset voltage at 5 representing the desired increase is added to the stored signal and their sum compared at 6 with the load cell output to sense equality. A motor 10 operates to increase tension until the comparator output indicates equality of its inputs. The filter 2 reduces noise in the load cell output and the amplifier 3 has a unity gain. The potentiometer 4 has a standard voltage E1 applied across it. Closure of switch A1 at the start of a test to connect the load cell 1 to the filter 2, also causes another switch (not shown) to initiate a timing circuit which changes over the switches B1, B2, B3 when the capacitor C1 has had time to store the initial tension signal. Changeover of the switches B1, B2, B3, is accompanied by energization of the motor 10 (by means not shown).

公开(公告)号：GB1158905A

公开(公告)日：1969-07-23

申请号：GB4062365

申请日：1965-09-23

Applicant: COURTAULDS LTD

Inventor： BETTS MAX WILLIAM ,  BAKER BERNARD STUART

IPC: H01G4/38

Abstract: 1,158,905. Measuring thickness electrically. COURTAULDS Ltd. Nov. 1, 1966 [Sept.23, 1965], No.40623/65. Heading G1N. [Also in Division H1] The denier of a yarn is measured by comparing the capacities of two substantially identical capacitors, between the plates of one of which the yarn travels. In the embodiment, one plate of each capacitor is formed by depositing a layer of metal and a guard ring on a common quartz plate or block, the other metal plate, which is common to both capacitors, is arranged to face that side of the quartz block on which the metal layers are deposited, and is spaced from the quartz block by a quartz spacing piece. Alternatively the common metal plate may be replaced by two identical metal plates connected together which may be identical to the deposited plates. Preferably the deposited plates are formed by evaporating a continuous layer of metal on to the block and then removing excess metal by chemical means, to isolate the plates and form the guard rings. In the measurement of yarn denier, the two guarded plates are connected to opposite ends of the secondary winding of a transformer which is centre tapped to earth and to the common plate or to the other two plates which are connected together. The current flowing between the common plate and earth is measured to give an indication of the denier of the yarn.

公开(公告)号：GB908794A

公开(公告)日：1962-10-24

申请号：GB3748958

申请日：1958-11-21

Applicant: COURTAULDS LTD

Inventor： BAKER BERNARD STUART

IPC: D01H5/36 ,  G01N3/32 ,  H03K3/84

Abstract: 908,794. Pulse generating circuits. COURTAULDS Ltd. Nov. 20, 1959 [Nov. 21, 1958], No. 37489/58. Class 40 (6). A random pulse generator comprises a waveform generator 20 connected to a capacitor 26 by changeover contacts 23 which connect the capacitor 26 alternately to the generator 20 or to a discharging circuit 24 containing a relay which controls further changeover contacts 29. A capacitor 27 is similarly alternately connected to generator 20 or to a further discharging circuit 25 containing a relay which in turn controls changeover contact 23. With the contacts in the position shown, capacitor 26 discharges through relay 24 until the current falls sufficiently to release the relay 24. Contacts 29 now change over, energizing relay 25 from the charge on capacitor 27, so that contacts 23 recharge capacitor 26 from the triangular wave generator 20. The charge on the capacitor connected to the generator 20 will thus be continually varying. The time taken for the capacitor to discharge to the release voltage of the relay is dependent on the initial charge on the capacitor, hence, provided the period of the triangular wave is less than the minimum discharge time, the relays will change over at random intervals. The system shown contains further circuits which result in the frequency, amplitude and duration of output pulses on line 37 varying in random manner. A second triangular wave generator 21 is provided to control the duration of each pulse on line 37. Contacts 30, 32 are respectively operated by relays 24, 25 so that when a signal controlling the start of a pulse is provided by the changeover of relays 24, 25, contacts 30, 32 change over, energizing relay 28 from one of capacitors 31, 36 charged from triangular wave generator 21. Relay 28 remains energized for a time depending on the voltage to which the capacitor has been charged by generator 21. Before relay 28 is operated, lead 37 is fed from a D.C. potential O which determines the base level of the output pulses. When relay 28 is energized, contacts 34, 35 are in the opposite positions from that shown so that the pulse amplitude is dependent on the voltage to which capacitor 33 has been charged by the triangular wave generator 22. Modifications.-Fig. 2 (not shown) relates to a modification in which generator 22 is omitted and a further capacitor is charged from generator 21 and switched by further contacts of relay 28 to a buffer amplifier feeding a further capacitor connected to the left-hand side of contacts 35. A sine wave generator may replace generator 20. Alternatively, three generators of different frequency may be selected in turn by signals derived from the output of the system. The apparatus may be similarly used to derive a large number of random pulses from a small number.