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31. 发明专利

GB985062A Improvements in or relating to the electromechanical determination of forces with a direct digital result 未知
公开(公告)号：GB985062A
公开(公告)日：1965-03-03
申请号：GB3320262
申请日：1962-08-29
申请人： ZELLWEGER LTD FACTORIES FOR AP
IPC分类号： G01L1/14
摘要： 985,062. Electric selective signalling. ZELLWEGER Ltd. Aug. 29, 1962 [Dec. 8, 1961], No.33202/62. Heading G4H. In a system for measuring a force the deflection of a spring arm 1, Fig. 1, is measured by transducing means included in the circuit of an oscillator 10, adapted to affect its frequency, the cycles being counted over a given time before and during application of the force,the difference between the counts being representive of the force. The transducer may be an inductive coil 3 the core of which is attached to the arm 1 so as to have a variable air-gap with a second arm 2. As the force increases the induction decreases. The coil 3 is connected in a circuit, Fig. 2,with capacitances 4, 6 and 9 forming an oscillating circuit. The given time is obtained from a reference frequency #3, Fig. 3 which is applied to a counter 22 arranged to close a gate 11 at a predetermined count. A diode switch 12 passes the initial offload signals to a counter 23 and the measurement signals to counter 24. This may be a pawl-andratchet motor,a multi-cathode tube counter or a chain of transistor triggers counting in binary scale. Instead of using two counters the same counter may be used, the first count being entered in a forward direction and the second in a backward direction. The residual count, being the difference represents the applied force. Instead of an inductive coil a variable capacitor may be used, the plates separating by deflection of the arm 1. Both types of transducer may be used together as shown in Fig. 10 connected to a single oscillator or arranged between different fixed arms 2, 8, Fig. 14, and connected to separate oscillators. Two coils 3 and 5 Fig. 11 may be similarly arranged the oscillator outputs being combined in a mixer to produce a difference frequency which is counted as before. The signals to be counted may be mixed with a reference frequency reducing them so that the off-load count is small (positive or negative) or zero. Instead of the above transducers,a resistive strain gauge type transducer may be used fastened along the upper surface of the bar. Additionally a second such gauge may be attached to the lower surface as shown in Fig. 21.

32. 发明专利

GB925151A Improvements relating to a method and apparatus for establishing and classifying sporadically occurring defects in textile products 未知
公开(公告)号：GB925151A
公开(公告)日：1963-05-01
申请号：GB4410559
申请日：1959-12-29
申请人： ZELLWEGER LTD FACTORIES FOR AP
IPC分类号： G01N33/36
摘要： 925,151. Testing yarns. ZELLWEGER Ltd. Dec. 29, 1959 [March 2, 1959], No. 44105/59. Class 120 (3). [Also in Group XXXVI] In an arrangement for selectively classifying and indexing specific types of yarn defects, a weight per unit of length measurement in the form of an electrical signal is obtained by passing the yarn 1, Fig. 10, through a measuring head 2, and fed to the parallel connected inputs of filters 4, 5, 6 in the paths of indicators 7, 8, 9. The indicators may be arranged to operate respective counters when the respective filter output voltages exceed predetermined values. Alternatively a diode threshold arrangement may be included in the filter circuit. Neps a, Fig. 1, slubs c and thickened portions b, for a particular speed of yarn feed, give rise to characterizing frequencies which the filters are designed to select. In order to compensate for the electrode dimension in the direction of yarn travel a running time discriminator including an oscillator D is included in the nep circuit so that a pulse inlet flank which is not followed in a predetermined time by an outlet flank is not recorded. An alternative arrangement is described in which there is a single filter output and measuring circuit, and the running speed is varied to detect the different type of defect.

33. 发明专利

GB838587A Improvements relating to apparatus for clamping warp threads 未知
公开(公告)号：GB838587A
公开(公告)日：1960-06-22
申请号：GB2770158
申请日：1958-08-28
申请人： ZELLWEGER LTD FACTORIES FOR AP
IPC分类号： D03J1/16
摘要： 838,587. Clamp for warp ends. ZELLWEGER Ltd. Aug. 28, 1958 [Sept. 10, 1957], No. 27701/58. Class 142(1) A device for clamping the cut end 4 of a warp comprises a comb 2 which can be engaged with the warp and retained by inserting a rod 5 through holes in the teeth 1. The comb is then inserted into a clamp consisting of a fixed jaw 10 and a movable jaw 11 which is tightened by relative endwise movement of bars 12, 13 having cam formations of saw-tooth shape on their contacting faces. Bevels 6 on the teeth 1 draw the comb into the clamp to grip the threads 4 between the jaws 10, 11 and the body 3 of the comb.

34. 发明专利

GB799782A Improvements relating to group selection receiver devices for remote control installations operating by the impulse interval method 未知
公开(公告)号：GB799782A
公开(公告)日：1958-08-13
申请号：GB3458955
申请日：1955-12-02
申请人： ZELLWEGER LTD FACTORIES FOR AP
IPC分类号： H02J13/00
摘要： 799,782. Actuation of switches. ZELLWEGER, Ltd., FACTORIES FOR APPARATUS & MACHINES, USTER. Dec. 2, 1955 [Dec. 16, 1954], No. 34589/55. Class 38 (5). [Also in Group XXXVIII] The selector of Specification 799,406 is modified by arranging the switches in " groups " so that the switch can only be operated when an impulse is transmitted and received during the given group selection interval. The drum 227 carries in addition to selector rings 251 &c., rings 291 &c., each of which is adjustably mounted on a ring 41 on the drum. A spring ring 261 is riveted to the ring 251 at 31 and carries a switch actuating pin 271. The ring 251 is held in adjusted position by a detent 255 engaging grooves 401 &c. in the drum 227, and ring 291 can be held in adjusted position by a spring 35 on ring 41 engaging grooves 501 &c. in ring 291. A pin 38 and the rivets 31 pass through slots 37, 37 1 , 37 11 in the ring 41 which is biased counterclockwise, Fig. 7, by a spring 36 secured to the ring 41 and to the spring ring 261 so that an arm 34 on ring 41 abuts the side of pin 271, Fig. 11 (not shown). Before the receipt of an impulse, however, the ring 261 and pin 271 have been deflected away from the disc 251 by a guide vane 45 during the final movements of the drum during the previous impulse, and hence the ring 41 has moved slightly further counter-clockwise into a position behind pin 271 preventing return thereof, Fig. 10. The pin 271 is thus clear of both. of the operating levers of its switch 241. When a starting impulse is received, the drum 227 rotates. If, after an interval a " group ' selection impulse corresponding to the group " for which the receiver is adjusted is received, the plate 218 moves into the position 218 1 to bring a projection 39 into the path of a cam 39 1 on the drum. Further rotation of drum 227 then stops the rings 291 and 41 and relative movement between these rings and ring 261 occurs so that the pin 271 is moved in the direction of arrow h in Fig. 10 so that it is freed from arm 34 and moves back towards ring 251. It is now in position to co-operate with the operating levers of the switch 241.

35. 发明专利

GB594423A Improvements in or relating to the dividing of warp stop motion blades from a stapleof blades in warp preparation machines 未知
公开(公告)号：GB594423A
公开(公告)日：1947-11-11
申请号：GB905445
申请日：1945-04-11
申请人： ZELLWEGER LTD FACTORIES FOR AP
IPC分类号： D03D51/20
摘要： 594,423. Looming warps. ZELLWEGER, Ltd., FACTORIES FOR APPARATUS & MACHINES USTER. April 11, 1945, No. 9054. Convention date, April 21, 1944. [Class 142 (ii)] A device for separating warp stop-motion blades from a staple of blades in warp preparation machines is characterised in that a knife co-operates - with the separating member in such a manner that the knife edge engages with the staple directly behind the blade to be separated. In the device shown, four .staples of blades are provided, and each separating member is in the form of a magnet 3 the distance between which and its-corresponding knife 10 is adjustable by a screw 31 according to the thickness of the blade 2. The knives are controlled by axial displaceably-mounted plungers 12 the movement of which is determined by staggered projections 15 on an exchangeable roller 15 which is rotated by pawl and ratchet mechanism co-operating with a connecting rod 21 and crank 20. When a projection 15' engages a plunger 12, the corresponding knife 10 is swung into an inoperative position. The magnets and knives are rotatably mounted about an axle 5 and have swinging motion imparted thereto by means of the crank 20 and a connecting rod 22 and link 25. The magnet moves from a looming position, Fig. 5 (not shown), where the blade is threaded, into a terminal position, Fig. 6 (not shown), where the blade is ejected, then into the blade-grasping position shown before returning to the looming position to complete a working cycle; the knife, however, after having intruded behind the blade to be separated is brought to a standstill by means of a disc 12 on the plunger 12. In the case of a staple of blades from which the foremost blade is not to be separated in the respective working cycle, the knife intrudes between the magnet and the foremost blade. The device may be used for separating open-ended blades for the purpose of putting them on separated warp threads. The magnets may be replaced by suction heads.

36. 发明专利

GB1025708A Improvements relating to the determination of the maximum consumption of electrical power 未知
公开(公告)号：GB1025708A
公开(公告)日：1966-04-14
申请号：GB3923163
申请日：1963-10-04
申请人： ZELLWEGER LTD FACTORIES FOR AP
IPC分类号： G01R21/00
摘要： 1,025,708. Selective signalling. ZELLWEGER Ltd., FACTORIES FOR APPARATUS AND MACHINE USTER. Oct. 4, 1963 [Oct. 5, 1962; July 26, 1963], No. 39231/63. Heading G4H. [Also in Division G1] In a method and apparatus for determining the maximum electrical power taken by a consumer, the current taken forms several voltages proportional to itself, all with different factors of proportionality, and the voltages are applied to the contacts of a multipoint switch, the highest voltage being arranged to charge a storage capacitor until the charge reaches the threshold value of a breakthrough device, whereupon it discharges through an electromagnetic device which connects the next lowest voltage to the storage capacitor; in this way, the contact associated with the voltage which is just insufficient to charge the storage capacitor enough to re-actuate the electromagnetic device is a measure of the maximum power taken (assuming a constant voltage and power factor). As shown, Fig. 1, the current taken passes through the primary of a current transformer 2 whose secondary is shunted by a stepped resistor 4 having tappings a . . . h which supply progressively lower voltages to the contacts A . . . H of a multipoint switch 5. Switch arm 6 initially connects the voltage at A via a rectifier 7, a smoothing capacitor 8, and a limiting circuit 9, 10 to a storage capacitor 12. When the capacitor voltage Uc reaches the breakthrough value of a four-layered diode 13, an electromagnetic device 14 is energized to step switch-arm 6 on to contact B. Only when the current taken rises enough to produce at B a voltage sufficient to re-actuate 14 does the switch-arm move on to C, and so on. Each contact A ... H may be marked with the value of maximum current or power, or a counter 15 may be provided. The time constant of the charging circuit may be made variable by connecting a number of storage capacitors in parallel and providing a selector switch. Other breakthrough devices, e.g. glow discharge tubes, may be used instead of a four-layered diode. Fig. 3, not shown, depicts a three-phase supply, each phase line containing a resistor, the voltage across which is supplied to the primary of one of three transformers whose secondary voltages are rectified and connected in series across stepped resistor 4. In a modification (Fig. 4, not shown), the voltage developed across a resistor 41 in the supply line is fed to the primary of transformer 42, whose secondary is tapped at points a . . . g which are connected through proportioning resistors to contacts A . . . G of multipoint switch 5. The tapped voltage charges a screen capacitor 8; when the capacitor voltage reaches the breakthrough voltage of Zener diode 83, transistor 85 becomes conductive and capacitor 12 is charged. Zener diode 82 limits the voltage across the base-emitter path of the transistor, and the charging rate of capacitor 12 is held substantially constant.

37. 发明专利

GB906914A Improvements relating to the control of warp tensioning and automatic let off of thewarp in looms 未知
公开(公告)号：GB906914A
公开(公告)日：1962-09-26
申请号：GB3416759
申请日：1959-10-08
申请人： ZELLWEGER LTD FACTORIES FOR AP
IPC分类号： B65H23/18 , D03D49/06
摘要： 906,914. Automatic tension control systems. ZELLWEGER Ltd. Oct. 8, 1959 [Oct. 22, 1958], No. 34167/59. Class 38 (4). [Also in Groups IX and XXIV] The warp tension in a loom is maintained by measuring the tension electrically and controlling the let-off. The warp 2 passes from a beam 1 over a sprung back-rest 5 to the cloth beam 26. The position of the back-rest 5 is indicative of the warp tension and this is detected by either a variable inductance 42 or a variable capacitance, Fig. 4 (not shown), or a differential transformer, Fig. 3 (not shown), or a resistance strain gauge or a piezo-electric crystal. The output of the detector is compared with a reference voltage 34 (or in the case of the differential transformer, the transformer stator is adjusted to give zero output at the desired value of tension) and the error signal is passed to an amplifier 40 (of undisclosed type) via a phase-shift network 30. The amplifier 40 controls the speed and direction of the drive 67 to the warp beam 1. The drive may be obtained from the main motor 29 driving the loom via an epicyclic gear-box 10 controlled by a pair of electromagnetic brakes (see Group XXIV) or the amplifier may supply a separate motor driving the beam. To compensate for the changes in tension due to shedding, a pair of switches 16, 17 cam-actuated in synchronism with the shafts 18 apply over-riding signals from a source 46 to the amplifier 40 to cause the necessary let-off and take-up of the warp beam. A switch (not shown) reduces the value of the reference voltage 34 when the loop is stationary to reduce the standing tension. A further switch enables the warp beam to be controlled manually.

38. 发明专利

GB887547A Improvements relating to the detection and removal of defective spontaneous cross section variation in textile material 未知
公开(公告)号：GB887547A
公开(公告)日：1962-01-17
申请号：GB2161060
申请日：1960-06-20
申请人： ZELLWEGER LTD FACTORIES FOR AP
IPC分类号： B65H63/06
摘要： 887,547. Testing yarns &c. ZELLWEGER Ltd. June 20, 1960 [Sept. 11, 1959], No. 21610/60. Class 120(3) [Also in Group XXXVI] In a method and apparatus for detecting and removing objectionable cross-section variations in yarns or other textiles, a signal produced in or by a measuring member is fed to a Schmitt trigger circuit and any output pulse arising from a signal amplitude exceeding the trigger voltage is applied through a differentiating network to trigger a monostable trigger pair to produce a pulse of sufficient duration to actuate severing means. The output from an inductively coupled transistor oscillator 9, Fig. 3, is fed to a measuring member comprising condensers 11-14 through which the yarn is passed, the measuring signal U 1 is rectified in a network 2 and then passed to a difference amplifier comprising transistors 31, 32, feed back from a succeeding low frequency amplifier 33 being provided through a resistor 306. The Schmitt trigger pair 41, 42, Fig. 4, has a shunt 43 across its input which may alternatively be connected to a variable voltage source whereby the trigger voltage may be adjusted, and its output is differentiated, in C.R. network 51, 52 before being applied to the base of transistor 6 ofthe monostable pair 61, 62. The output pulse U5, of predetermined duration is power amplified by transistors 71, 72 and applied to operate electro magnetic severing means 8. A rectifier 82 is provided for surge suppression at switch-off. An arrangement for adjusting the sensitivity of a group of devices mounted on a single machine by controlling the oscillator D.C. feed voltage is described with reference to Fig. 5 (not shown).

39. 发明专利

GB855267A Method and device for determining spontaneous cross sectional variations in textile material 未知
公开(公告)号：GB855267A
公开(公告)日：1960-11-30
申请号：GB1063859
申请日：1959-03-26
申请人： ZELLWEGER LTD FACTORIES FOR AP
IPC分类号： B65H63/06
摘要： 855,267. Yarn cleaners. ZELLWEGER Ltd. March 26, 1959 [May 9, 1958], No. 10638/59. Class 120(2) [Also in Group XXXVI]. In a method of and apparatus for indicating short term cross-sectional variations in a textile material the material is drawn through a condenser arrangement having two measuring fields connected in different arms of an electrical bridge circuit so that whereas short term variations in cross-section of the material unbalance the bridge long term variations have an equal effect on each measuring field and balance cut. Fig. 2 shows a bridge circuit energized by a high frequency oscillation generator 1 and comprising in two arms a capacitor arrangement 3 which as shown in Fig. 1 has an electrode assembly supported on an insulated base plate 10 so as to form two condensers comprising electrodes 4, 5, and 4, 6. The textile material 9 to be investigated is drawn so as to form a dielectric between the plates of the condensers and any out-of-balance voltage produced across the bridge is rectified in circuit 13, 14 to produce a A.C. voltage across terminals 12, 15. The variable capacitor 7 is adjusted so that with empty measuring fields zero output voltage is obtained from the bridge. If due to a short term cross-sectional variation in the material 9 there is more material in one of the fields compared with the other an out-of-balance voltage is obtained across terminal 12, 15. In the case of long term variations in cross sectional area of the material the bridge remains in a balanced condition. Alternative arrangements of the bridge circuit are described with reference to Figs. 10 and 11 (not shown). Fig. 12 shows an arrangement in which the out of balance voltage produced from the bridge is amplified in a transistor 42 and applied to a trigger circuit 46 to control a relay 47 so that when short term variations in the cross-sectional area of the material under test occur the relay is operated to actuate a cutter 55, 56 to separate the textile material at the faulty position. A trigger circuit using transistors is described with reference to Fig. 13 (not shown). The length of the small electrodes may be changed and the spacing between them varied as described in connection with Fig. 9 (not shown) since it is shown mathematically that these factors are dependent upon the standard short term variations in crosssectional area which may be expected with various types of textile material. Thus in respect of cotton the shorter electrodes of the arrangement should have a minimum length of four millimetres and a maximum of 30 mm. For wool a length varying between 4 and 60 mm. For cotton the distance between the electrode centres should be between 10 and 30 mm. and for wool between 10 and 80mm. A scale on the condenser arrangement Fig. 9 (not shown) indicates the distance between the electrode centres.

40. 发明专利

GB837077A Improvements relating to apparatus for tying threads 未知
公开(公告)号：GB837077A
公开(公告)日：1960-06-09
申请号：GB2169458
申请日：1958-07-07
申请人： ZELLWEGER LTD FACTORIES FOR AP
IPC分类号： B65B13/26 , B65H69/04
摘要： 837,077. Knot-tying devices. ZELLWEGER Ltd. July 7, 1958 [July 6, 1957], No. 21694/58. Class 112 In a knot-tying device comprising a sleeve about which loops are formed, and a hook longitudinally displaceable into the sleeve to draw the threads therein during completion of the knot, a threadclamp which holds the thread ends while the loops are being formed is positively opened when the thread-ends are engaged thereby and also when the hook moves into the sleeve. As shown, a hook 2 is longitudinally displaceable into a stationary sleeve 1 on which is journalled a hollow shaft 4 adapted to rotate 3 times for each knot-tying operation. A sleeve 6, which is slidably coupled to shaft 4 by means of a key 3, is formed with a gear 5 and a radial flange 7 spaced from the latter. A forked member 9 disposed between gear 5 and flange 7 is displaceable by means of a shaft 10 for shifting' sleeve 6 axially on shaft 4. A gear 13, journalled on sleeve 6, has an extended hub 14 which abuts a collar 16 fixed to sleeve 6 by a grub screw 15. Gears 5, 13 are interconnected by gears 10, 12 journalled in fork 9, the arrangement being such that gear 13 rotates in the same direction as gear 5 but only once for each knot-tying operation. A sleeve 17 carried by collar 16 is rigid with a fixed thread-clamping jaw 18 and contains a plunger 20, one end of which carries a movable thread-clamping jaw 19 and the other end of which is biased by a spring 22 into engagement with a side face of gear 13. Said face is formed with a cam 23 which subtends an angle of 40 degrees and which is adapted to engage plunger 20 for opening jaw 19. The arrangement is such that jaw 19 remains open from 30 to 90 degrees during the first revolution of gear 5 when the thread ends are engaged by the jaws, and also remains open from 210 to 270 degrees during the second revolution of gear 5 when hook 2 draws the threads tied therein into the interior of sleeve 1. It is stated that the arrangement enables spring 22 to be made sufficiently strong to prevent the inadvertent slipping of elastic cords from between the jaws 18, 19. The jaws may also be roughened to enhance their grip.

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