baber/WOPTO huggingface dataset:
Patent GB-338898-A (GB)
Title: Improvements in valve controlling apparatus
IPC: F15B13/04
Filed: 1929-08-22
Abstract: 338,898. Triggs, W. W., (Scovill Manufacturing Co.). Aug. 22, 1929. Valves actuated by pilot or relay valves. -Apparatus for the control of fluid-operated devices comprises a slide-valve 474, Fig. 5, actuated by fluid pressure acting on a differential piston arrangement. 482, 487, said slide valve alternately connecting the supply passages 464, 465 of a fluid-pressure unit with the slidevalve chest 471 and exhaust 466, 469, and being controlled by a solenoid-operated valve, Fig. 7, which regulates the passage of fluid pressure from the valve chest 471 through a bye-pass 490, 491 to the outer face 482 of the differential piston. Fluid pressure, such as compressed air, is supplied to the, valve chest 471 through a pipe 473 and thence to airpower units through bores 464, 467 and 465, 468. Alternatively, the slide-valve and its pilot-valve may be mounted on a hydraulic valve device, Fig. 1, controlling the inlet and exhaust of hydraulic pressure to and from a hydraulic power unit. In this case, two slide-valve units 472, 472a control the pistons 437, in cylinders 438, of the main inlet and exhaust valves 425, 428, respectively of the power unit, which is connected to the pipe 445. The hydraulic pressure inlet is at 429 in the valve block 428 and the exhaust is at 446. The pilot valve, Fig. 7, consists of a, double-beat valve 500, 498 connected to the core 503 of the solenoid 504 and is normally held in the position venting the cylinder 484 of the piston 482 by a spring 507. When the solenoid 504 is energized, the valve 498 is opened and air pressure passes from the chest 471 through the bores 490, 491, valve 498, and bore 496 to the piston 482 to move the slide valve to the right. The D.C. circuits of the solenoids 504 are controlled by A.C. contactor devices operated by some moving part or parts of the controlled unit, in such a manner that the main inlet valve 425 of the hydraulic valve unit in Fig. 1 is closed when the exhaust valve 448 is open, and vice versa. Alternatively, one slide valve only may be provided for operating both valves of the hydraulic valve unit in Fig. 1, the bores 464, 465 of the slide valve being each provided with two transverse bores such as 467, 468, the two sets of bores being cross-connected to the valve operating cylinders so as to operate the valves alternately. The slide valve units, which may control more than one pressure fiuid unit, may be remote from the cylinders they operate and may be localized at a central control station, or a number of slides valves at a central station movable in a common valve chamber with a common pressure fluid inlet may be controlled each by its solenoid-operated pilot-valve, which may be provided with an emergency hand-actuation, such as a push-button 690, and may be mechanically latched in this position.
Patent GB-601496-A (GB)
Title: Improvements in or relating to film-adhesives
IPC: C09J7/10
Filed: 1945-10-03
Abstract: A film adhesive is made by forming a film from a mixture of a polyvinyl acetal, e.g. polyvinyl butyral, and a heat-hardenable phenol-aldehyde resin and stretching it parallel to the plane of the film to effect molecular orientation.  Mixing may be effected in a common solvent, e.g. industrial spirit, at elevated temperature.  The film may be made by extrusion to form a tube which is flattened or slit longitudinally and flattened out, or by calendering or casting on to a support, which is preferably moistened, and stripping. Stretching may be effected by inflating the tube and heating to harden partially before slitting.  The phenol-aldehyde resin may be a resol formed by condensing a phenol with excess formaldehyde in the presence of alkali or may consist of a mixture of hexamethylene-tetramine and a resin formed by condensing a phenol with less than equimolecular proportions of formaldehyde in the presence of acid. Plasticizers, hardening accelerators, colouring agents and mineral or fibrous fillers may be added.  Specification 574,459 is referred to.
Patent GB-894165-A (GB)
Title: Improvements in or relating to flexible shafts
IPC: F16C1/00
Filed: 1960-07-25
Abstract: 894,165. Making flexible shafts. SCHMID, R., and WEZEL, W., [trading as SCHMID & WEZEL]. July 25, 1960 [July 25, 1959], No. 25751/60. Class 83 (2). [Also in Group XXIV] A flexible shaft is made by winding one or more layers of wire 4 ... 7 upon a core 1 of non-metallic material such as synthetic resin or paper. The core 1 may then be shrunken by heat and withdrawn from the shaft, or alternatively destroyed by chemical means.
Patent GB-601546-A (GB)
Title: Improvements in or relating to electric upsetting apparatus
IPC: B21J9/08
Filed: 1945-10-03
Abstract: 601,546. Forging-machines; dies. MORA, G., and OMES, Ltd. Oct. 3, 1945, No. 25761. [Class 83 (iv)] The anvil of an electric upsetting machine is made of a metal which is a relatively poor conductor of heat such as grey cast iron. The machine comprises a base 11, an anvil supporting block 12 of bronze or other good conductor of electricity and a vice-supporting block 13. On the block 12 is a clamp 21, 22 for the shank 23 of an anvil carrier having a dovetailed slot within which the anvil head 25 is held by means of a screw 29. The head is long compared with the slot and as its surface becomes destroyed, the head can be moved along the slot to bring a fresh part of its surface into operative position. Both the shank and the head are provided with water-cooling passages. The use of a metal of relatively poor heat conductivity for the anvil head is said to prevent the formation of a fold 46 such as is shown in Fig. 3 due to the work being cooled at its point of contact with the anvil to below the desired upsetting temperature.
Patent GB-1327708-A (GB)
Title: Lasers
IPC: H01S3/139
Filed: 1971-04-19
Abstract: 1327708 Lasers SIEMENS AG 19 April 1971 [1 April 1970] 25780/71 Heading H1C A single or dual mode gas laser has an A.C. magnetic field applied to it which, when the laser resonator frequency does not coincide with the centre frequency of the lasing transition of the gas, produces left and right circularly polarized outputs which are intensity modulated at the frequency of the field; the modulation is detected and used to adjust the resonator length until the output frequency of the laser is the same as the centre frequency of the transition. Fig. 2 shows a He-Ne laser tube 1 surrounded by a coil 7 which forms part of an electrical resonant circuit driven by an oscillator 9. The magnetic field produces circularly polarized outputs RZP and LZP which are converted by a #/4 plate 5 to two mutually perpendicular plane polarized beams whose intensities vary both with the field frequency and with the deviation of the laser output from the centre of the transition. One of the plane polarized beams is passed by filter 50 to a photodetector 10, and the resulting signal is compared at demodulator 12 with a signal from oscillator 9. The output from the demodulator is passed through a low pass filter 13 and sets a piezoelectric mirror mount 4, thus stabilizing the output frequency at the centre of the transition. Fig. 1 provides a fine control system of limited holding range, and a coarse control may be added, Fig. 2 (not shown). In this, a potentiometer also supplies a voltage to the mirror mounting, and is driven by an electric motor. The motor is actuated only when the voltage from the photodetector of Fig. 1, indicates that the laser is considerably off tune, e.g. at switchon, and a logic circuit disables the control loop of Fig. 1, while the motor is in action. A further circuit may be added which detects when the potentiometer is near the end of its travel and resets it to its central position, the other control loops being disabled during resetting and an alarm being actuated.
Patent GB-257895-A (GB)
Abstract: 257,895. Pirelli & Co., (Assignees of Emanueli, L.). Sept. 2, 1925, [Convention date]. Insulating coverings for cables; cables, arrangement and disposition of parts of.- Multi-core oil filled high tension cables comprise a number of insulated helicallyarranged cores 5, 6, 7, separated from each other by barriers 10, 11, 12, a covering of insulating material 13 coacting with the cores and barriers to form longitudinal oil passages, and a metal sheath. The barriers are preferably made of impregnated paper, and are arranged back to back between the cores as shown. The covering 13 is formed by a winding of impregnated paper.
Patent GB-798734-A (GB)
Title: Improvements in and relating to washers for bolts or like fastening means
IPC: F16B43/02
Filed: 1956-08-23
Abstract: 798,734. Bolts, nuts and washers. SCHUTTE, C. E. Aug. 23, 1956, No. 25864/56. Class 89(1) A washer 34, for compensating for angles between the head or nut of a fastenershank 42 and a surface of a member through which the shank extends, comprises a semi-spherical body 36 with a flanged-edge 40. The body is formed with a slot 38 extending from the crown of the body toward the edge. A tongue 44 formed from the material removed to make the slot is positioned to abut the shank in all positions thereof. The nut or head of the shank may be part-spherically shaped for full engagement with the washer. In a modification, the tongue is replaced by a slotted flat disc secured to the edge 40.
Patent GB-373509-A (GB)
Title: Improvements in or relating to shock absorbers
IPC: F16F9/26
Filed: 1931-09-15
Abstract: 373,509. Hydraulic shock-absorbers. STEVENS, A. H., 5, Quality Court, Chancery Lane, London.-(Delco Products Corporation ; 329, East 1st Street, Dayton, Ohio, U.S.A.) Sept. 15, 1931, No. 25874. [Class 108 (iii).] In apparatus in which a double-ended piston is reciprocated in the cylinder by an intermediate lever, wear pieces are each urged into engagement with the lever by a spring which also closes a throttling valve in the piston. In the construction shown in Figs. 2 and 5, the operating lever 45 engages wear pieces 44 which are free to slide within limits in the piston 32, 33. Each wear piece is formed with a seat for a .throttling valve 52, 62, the valves being forced on to their seats by springs 43, 63, which also urge the wear pieces into contact with the lever 45. Liquid is led from each of the compression chambers 35, 36 to the relief valve in the opposite end of the piston through grooves 68, 72 in the piston shown separately in Fig. 5, each of the grooves being connected to its throttling valve by radial holes. 67, 73 in the piston and 65 in the wear pieces. The compression chambers are replenished from the central reservoir 25 through valves 51, 61 in the wear pieces held on to their seats by light springs. In the construction shown in Figs. 6 and 7, the seats for the valves are provided in plugs 141, 168 screwed into the piston. The small spring 150 forces the left hand valve 146 on to its seat and also engages the wear piece 144, while the large spring 152 only operates when the valve has been raised well off its seat. Fluid passing the valve 146 is led through passage 160 and one-way-valve 164 to the other compression chamber 136. The other valve 172 slides on a pin 176 having a groove 177 which provides a fixed leakage orifice for small movements of the piston. During larger movements the valve is forced off its seat against the resistance of spring 167. The compression chambers may be replenished from the reservoir 125 through one-way valves 190.
Patent GB-1105495-A (GB)
Title: Improvements relating to electrical networks compensated for earth short circuits
IPC: H02H9/08
Filed: 1965-06-18
Abstract: 1,105,495. Earth fault protection for interconnected A.C. systems. LICENTIA PATENTVERWALTUNGS-G.m.b.H. 18 June, 1965 [18 June, 1964], No. 25912/65. Heading H2H. In an arrangement for protecting interconnectible polyphase networks, each network has a neutral point connected to earth through a coil whose inductance is regulable under the control of a relay responsive to a voltage which is indicative of the degree of resonance between the coil inductance and the earth capacitance of phases not affected by earth fault, the operation of the relay controlling the regulation of the coil of one of the networks being delayed for a period allowing the regulation of the coil of another network. Thus, if an earth fault occurs in a system having several interconnected networks the relay in one of the networks operates immediately; the operation of another relay controlling the regulation of a coil in an associated network is delayed to start the regulation of the respective coil only after the range of regulation for the first coil has been completed, and so forth, until the total actual inductance of all the coils substantially neutralizes the earth capacitance of the sound phases of the system. The relays which operate sequentially are preferably responsive to different voltages, and known means may be provided for automatically reversing the regulation and resetting the relays.
Patent GB-1521745-A (GB)
Title: Grain drying apparatus
IPC: F26B9/06
Filed: 1976-06-16
Abstract: 1521745 Hoppers E H BENTALL & CO Ltd 16 June 1976 [18 June 1975] 25996/75 Heading B8S [Also in Division F4] Grain drying apparatus comprises silos 2 each of whose floors is flush with, or is constituted by lowered panels 8 through which air is blown into the silos from air ducts 6 which communicate with a main air tunnel 4. The louvres direct the air towards the outlets 12 of the silos 2 so that the grain passes through the outlets 12 and through passages 16 on to a common conveyer 18 located in a closed conveyer housing 19 to which a fan (20) is connected by means of a pipe (22), Fig. 2 (not shown), so that suction is applied to the outlets 12.
Patent GB-1378854-A (GB)
Title: Cross-linked polyalkylene imine resins
IPC: C08J7/054
Filed: 1971-11-03
Abstract: 1378854 Cross-linked polyalkylene imines ESB Inc 3 Nov 1971 [4 Nov 1970 30 Sept 1971] 26018/74 Divided out of 1378853 Heading C3R The invention comprises a water-insoluble resin which is a polyalkylene imine cross-linked with at least two polyfunctional compounds each containing at least two functional atoms or groups which are ethylenic unsaturation, epoxy, epithio, carboxylic acid or anhydride, aldehyde, ketonic, isocyanato, isothiocyanato or phenolic hydroxy groups or halogen atoms. 'The polyalkylene imine may have pendant polar groups to promote adhesion to substrates, and these may be formed by reaction of the polymer with a monofunctional compound having an unreactive polar group. In examples, solutions of polyethylene imine, poly-(2-methylaziridine) and triethylene tetramine are partially reacted with various cross-linking materials including epichlorohydrin, N,N<SP>1</SP>-methylene bisacrylamide and glycidyl methacrylate, coated on glass, polycarbonate, polymethyl methacrylate and an interpolymer of allyl diglycol carbonate, vinyl acetate and methyl methacrylate, and then made water-insoluble by heating; some of the polyalkylene imines also are reacted with monofunctional compounds including acrylonitrile, methyl methacrylate and styrene to form pendant polar groups.
Patent GB-684435-A (GB)
Title: Installation for the measurement by photo-electric means of the position of a line of a graduation
IPC: G01D5/39
Filed: 1950-10-25
Abstract: 684,435. Scale-reading apparatus. SOC. GENEVOISE D'INSTRUMENTS DE PHYSIQUE. Oct. 25, 1950 [Nov. 18, 1949], No. 26047/50. Class 97 (i). [Also in Group XL (b)] Photo-electric apparatus for measuring the position of a graduation line, for example a mark on a rule, comprises optical means for oscillating a beam of light over the surface carrying the line and for causing the reflected light to impinge on a photo-cell whereby a pulse appears in the cell output each time the beam traverses the graduation line, the pulses being applied to deflect the beam of a cathode-ray tube executing an oscillation in synchronism with the light beam. In Fig. 1, the image of rectilinear filament 1 is formed on graduated surface 30 by objective lens 24 and oscillated over the region of graduation 8a by means of a deflector 25 having parallel plane surfaces. The deflector is mounted in the field of a magnet 27 and oscillated at the frequency of an alternating supply R by current through winding 26. The reflected light reaches photo-cell 31 by way of part-reflecting mirror 28, and the pulse which occurs each time the light beam traverses the less-reflecting graduation 8a is applied through amplifier 10 and circuit 11 to the horizontal deflecting-plates 47 of cathode-ray tube 40. The vertical deflecting plates 46 are supplied from the supply R so that the horizontal deflection 48 due to the photo-cell pulses correspends to the position of graduation 8a and may indicate against a scale 45. The system provides a magnification L/l, where L and l are the extent of the electron beam and light beam deflections respectively. Circuit 11 converts the photo-cell pulses into pulses of shorter duration and may take the form described in Specification 581,930, [Group XL]. A mirror 32 adjustably pivoted about axis 34 permits an eye-piece 36 with cross-wires or hair-line 35 to be employed to position the graduation in the useful field of the apparatus. In an alternative construction, Fig. 2 (not shown), mirror 32 is replaced by a semi-reflecting mirror permitting light to reach the eye-piece and photo-cell simultaneously. In yet another construction, Fig. 4 (not shown), a half prism or mirror located between the lamp and objective lens is employed to reflect the light to the photo-cell, and a diaphragm with a slit is located in front of the cell. Deflector 25 may be located between the lamp and objective lens.
Patent GB-463061-A (GB)
Title: Improvements in or relating to light sensitive electron discharge devices
IPC: H01J25/76
Filed: 1935-09-20
Abstract: 463,061. Electron multipliers. BAIRD TELEVISION, Ltd., and FORMAN, J. R. H. Sept. 20, 1935, No. 26089. Drawings to Specification. [Class 39 (i)] In a light-sensitive multiplier, e.g. for television, of the type having two opposed plates between which the electrons oscillate and a collector electrode, one of the plates is photoelectric and the electrodes are so arranged that external light falls freely on this plate, means being provided for causing the collector to become highly positive periodically. In one form, a short cylindrical collector electrode is arranged between two plates consisting of or coated with alkali metal; one of which is apertured so that a beam of light falls on the other. An ultra-high frequency potential is applied across these plates having a period twice the time of flight of an electron between the plates, and a low-frequency potential is applied between the mid-point of the circuit between the plates and the collector electrode through a resistance across which the output potentials are developed. A focusing coil longitudinally of the device directs the electron cloud through the collector electrode prior to collection. Specification 450,138 is referred to.
Patent GB-656806-A (GB)
Title: Improvements in or relating to air conditioning apparatus
IPC: F24F3/00
Filed: 1948-10-08
Abstract: 656,806. Unit air conditioning apparatus. AIR TREATMENT ENGINEERING CO., Ltd., and FREAN, F. C. Oct. 8, 1948, No. 26243. [Class 137] A self contained air conditioning apparatus is composed of a number of units arranged in series, each being in the form of a rectangular casing adapted to be secured in readily releasable fashion to its adjacent unit and performing its function independently of any other unit. The apparatus comprises a mixing unit 1 for mixing fresh and recirculated air admitted through inlets 2 and.3 which are controlled by dampers, a filter unit 5, provided with filter cells 6, a preheater unit 7, a washing unit 8, in which the washing fluid is circulated by an electric motor 9 and pump 10 from a sump 11; a final heater unit 12 for adjusting the air temperature to the required value and a discharge unit 13 having an electrically driven fan 14 which draws air through the whole apparatus and discharges it into the room through an outlet 15. A cooling unit may also be included in the assembly if required.
Patent GB-907891-A (GB)
Title: An arrangement for ascertaining the transfer function of a transmission member
IPC: G05B23/02
Filed: 1959-07-31
Abstract: 907,891. Attenuation/frequency measurement; phase measurement. LICENTIA PATENT-VERWALTUNGS-G.m.b.H. July 31, 1959 [Aug. 1, 1958], No. 26360/59. Class 37. Apparatus for measuring the transfer function of a transmission network comprises a pair of D.C. energized sinusoidal potentiometers 19, 20 gearedly driven from motor 3 controlled by a speed regulator 5 determining their output frequency. The output of potentiometer 20 feeds a comparison line 15 and that of potentiometer 19 is amplified and applied to an electrical transmission member 9; the brushes of potentiometer 20 being rotatable about its axis to enable the phase angle of the output voltage to be varied. Input and output tappings 1, 2 of the transmission member derive voltages for comparison which after removal of D.C. components by bias sources 10, 11 are selectably applicable by switch 21 to the input of a logarithmically calibrated variable high resistance 12 coupled through an impedance converter 17 to a corresponding variable low-resistance section, whose output is applied together with the output of attenuator 16 fed from comparison line 15 to an indicator device 14, which may be a cathode-ray oscillograph of which the respective pairs of plates are energized from the outputs of 13 and 16. The calibrated attenuation line and the phase shifting brushes of potentiometer 2 are adjusted so that the outputs derived from tappings 19, 20 are identical in amplitude and phase when applied to indicator device 14, and it is then shown that the transfer function of the transmission member 9 between the two tapping points is given by where u 2 /u 1  is the amplitude ratio given by the attenuation line and (# 2  - # 1 ) is the phase shift inserted at the potentiometer brushes. It is stated that a mechanical transmission member may be similarly tested by driving the input from shaft 18 rotating in synchronism with the potentiometer 19 and applying the output to drive a tachometer generator whose signal is applicable to the resistance 12 alternatively with the potentiometer output.
Patent GB-1186578-A (GB)
Title: Watch Case
IPC: G04B37/11
Filed: 1967-06-08
Abstract: 1,186,578. Watch cases. MANUFACTURE DE BOITES DE MONTRES S. GRABER S.A. June 8, 1967 [June 9, 1966], No.26410/67. Heading G3T. A watch case of non circular shape, e.g. square, comprises a holder 1 for the glass 5 and a base 8 held in position by a detachable locking member 14, e.g. of ring form, having at least three projecting peripheral lugs 17 each adapted to engage in a groove 20 in the peripheral wall 2 of the holder 1, either or both of the two co-operating surfaces of each engaging lug and groove being helically inclined.