baber/WOPTO huggingface dataset:
Patent GB-1481841-A (GB)
Title: Programmable diffraction grating
IPC: G02B27/42
Filed: 1974-06-28
Abstract: 1481841 Controlling light SPERRY RAND CORP 28 June 1974 [29 June 1973] 28822/74 Heading G2F A programmable optical diffraction grating comprises a magnetic stripe domain film spaced from a parallel array of selectively energizable elements each for locally applying to the film in its plane a D.C. magnetic field of a controlled orientation and magnitude, selection and energization of the elements being such that domain walls extend continuously from one local area to adjacent areas, whereby continuous linear or curvilinear domain walls of controlled separation and orientation are produced in the film as a whole. It is said that both the spacing of the energizable elements from the film, whereby the magnetic field at the film is smoothed, and the juxtaposition of the locally addressed areas in a single film ensure the production of continuous domain walls. As particularly described the magnetic film is backed by a mirror and reference is made to use of the Kerr and Faraday effects as providing the means for the diffraction process. The energizable elements each comprise two stripline arrays for producing an X- and Y-directed magnetic field respectively. Current pulses are fed simultaneously to the two arrays, and at the start of the pulse, an A.C. "tickle" field of reducing intensity is applied normally to the plane of the film, to reduce its coercivity. The array of elements may be addressed consecutively or simultaneously, depending on the coercivity of the film.
Patent GB-813086-A (GB)
Title: Improvements in or relating to rear view mirrors for motor vehicles
IPC: B60R1/064
Filed: 1957-09-13
Abstract: 813,086. Mirror assemblies. GENERAL MOTORS CORPORATION. Sept. 13, 1957 [Sept. 17, 1956], No. 28847/57. Class 103(2) A rear view mirror 12 adjustable from within a vehicle is mounted on the outer panel 16 of the vehicle door 18 by means of a support member 24 with a partspherical raised portion 26 formed to provide a ball portion 28 which engages a socket portion 36 formed on a support arm 34 for a mirror head 32. The head 32 is attached to the support member by a neck 38 on the arm 34 which extends through an opening 30 in the ball portion 28. The head 32 is retained there by a spring 44 within the portion 26 engaging a washer 46 secured to a shoulder 48 on the neck 38. A control rod 54 extends from a press fitting in the neck 38 through a hole 52 in the panel toward the inner door panel 58, through an elongated opening 60 therein and through a slot 70 in a guide plate 66. A friction bush 72 disposed about the end of the rod 54 and wholly within the plate 66 to assist in biasing the rod in a preselected position comprises a sleeve 74 which has flanges 76, 78 at opposite ends thereof and on opposite sides of the plate 66. The sleeve 74 has washers 80, 82 on opposite sides of the slot 70 and a spring 84 thereon between the washers acts against the flange 76 and against the washers to bias the flange 78 towards the slot 70. A knob 90 is secured to the rod 54 by a screw 92 in order to operate the mirror assembly. In a modification, the rod may have a kink which abuts a shoulder on the inner panel to prevent excessive rotation of the mirror.
Patent GB-1245556-A (GB)
Title: Improvements in and relating to incinerating plastics
IPC: F23G5/44
Filed: 1970-06-15
Abstract: 1,245,556. Generating HCI from polymers. TAKUMA KIKAN MFG. CO. 15 June, 1970 [3 Oct., 1969], No. 28874/70. Heading C1A. [Also in Divisions F3-F4] Polyvinyl chloride, polyvinylidene chloride or like polymerized chlorine containing monomers from storage pit 1 are dehydrohalogenated at 280 C. in hot air jacketed rotary kiln 7, the molten plastics residue after cooling and crushing being completely burnt out in incinerator 15. Waste gases from the incinerator heat the air to be supplied to the kiln air jacket 8. Hydrogen chloride evolved in the kiln is collected in chamber 14. (For figure see next page.)
Patent GB-911535-A (GB)
Title: Compressors for gas turbine engines
Inventor: KENT NELSON HECTOR
IPC: F01D17/16
Filed: 1959-08-24
Abstract: 911,535. Axial-flow compressors; gasturbine plant. ROLLS-ROYCE Ltd. Aug. 16, 1960 [Aug. 24, 1959], No. 28932/59. Classes 110 (1) and 110 (3). In a gas-turbine jet-propulsion engine of the by-pass type, the inlet guide vanes 23 of the high-pressure compressor are pivoted in unison about their spindles 24 by means, which may be as described in Specification 876,504, operated by an hydraulic or pneumatic ram in accordance with engine rotational speed. Air can be bled from an intermediate stage of the high-pressure compressor into the engine bypass passage through bleed holes 30, under the control of an axially movable annular bleed valve 31 which is supported from the outer wall of the by-pass passage by pivoted links 35. When the engine is started, the vanes 23 are initially set to provide maximum swirl to reduce the load on the compressor and the bleed valve 31 is fully open to prevent surging of the compressor. When a speed of 6600 r.p.m. is reached, the control means begins to move the vanes 23 towards their normal operating position. Simultaneously, the bleed valve 31 is moved towards its closed position by means of a number of linkages each connected to a guide vane spindle 24 and comprising a crank 48, link 46 and toggle linkage 40. Rollers 49, 50 carried by the toggle linkage engage parallel cam-plates 51, 52. At 7100 r.p.m. the valve 31 reaches its fullyclosed position, with its flanges 32, 33 engaging flanges 28, 29 on the compressor casing. At the same time the rollers 49, 50 come opposite outwardly-curved portions 53, 54 of the camplates, allowing the toggle linkage 40 to collapse and permit further movement of the guide vanes 23. The normal operating position of the vanes 23 is reached at 7800 r.p.m. Flange 33 has a larger effective area than flange 32 whereby the valve 31 is urged into the closed position by the bleed air.
Patent GB-785092-A (GB)
Title: Rotary compressor
IPC: F04D29/46
Filed: 1955-10-11
Abstract: 785,092. Centrifugal compressors. YORK SHIPLEY, Ltd. Oct. 11, 1955 [May 23, 1955], No. 28950/55. Class 110 (1). [Also in Group XXXIV] A centrifugal compressor comprises a shaft 66 which drives a compressor impeller 65 and a centrifugal oil pump impeller 69, the shaft being mounted in bearings in a housing 14 provided with a reservoir 37 for lubricant separated by a partition 35 from a sump 36. The impeller 69 discharges lubricant to chamber 88 from which it flows through passage 108 and pipe 109, to a filter, then through pipe 112 and passage 113, part of the lubricant flowing to a bearing 68 and part through part 57 and channel 56 to a bearing 46. Some oil from bearing 68 returns to the pump and some flows by passage 114 and valve 115 to the reservoir 37. When there is considerable pressure of oil at the bearing 46 a spring-pressed seal ring 74 is moved back allowing oil to enter space 58 and flow by way of port 59 to sump 36. Oil is delivered from sump 36 to chamber 37 through pipe 116 under pressure caused by compressed vapour which flows between the shroud plate of impeller 65 and plate 51, past a seal 79 and through space 58 and passage 59 to the sump 36. Some of the oil in channel 56 flows past a thrust bearing 44 to a space 91 and through nozzle 117 to line 118 entraining oil from the chamber 37. The oil from line 118 passes through a cooler before returning by pipe 121 and passage 122 to the pump inlet. The impeller shaft 66 has the thrust bearing 44 engaged by an elastic disc 48 which carries the bearing 46. An enlarged portion 71 of the shaft 66 is formed with two diametrically-opposite ratchet notches 92 for engagement by a pawl 93 which prevents reverse rotation when the compressor is shut down and when the compressor is in action, acts as a valve and closes port 96. It also prevents rotation of shaft 66 when drive-shaft 98 is being unscrewed to disassemble the compressor. A unit 123 interposed between pump discharge 88 and chamber 37 comprises a ball valve 124 which may close against an upper seat 126 and is sustained by a slotted bushing 125. It passes air bubbles when new oil is being used but soon closes to prevent a free path for oil flow. In a refrigerant compressor, any refrigerant dissolved in the oil is boiled off through a spring-loaded relief valve 64 with a restricted port, the valve being connected by a pipe 62 to the inlet throat 23 of the compressor.
Patent GB-1207713-A (GB)
Title: Polyamines of relatively high molecular weight
Inventor: HEYDKAMP WOLFGANG
IPC: C08G63/91
Filed: 1968-06-18
Abstract: 1,207,713. Polyamine derivatives of polymers. FARBENFABRIKEN BAYER A.G. 18 June, 1968 [19 June, 1967], No. 28993/68. Heading C3R. The invention comprises an at least bifunctional polyamine of molecular weight 500-5000 having a polyester, polycarbonate, polyether and/or polythioether structure and having the general formula in which X is a polyester, polycarbonate, polyether and/or polythioether moiety, R 1  is H or a C 1-4  aliphatic radical, R 2  is a bivalent C 2-18  aliphatic radical (optionally interrupted by a heteroatom, e.g. O or S) or a bivalent C 7-18  araliphatic radical (with an optional heteroatom, e.g. N, O or S), and R 3  and R 4 , which may be the same or different, each represent H, a C 1-6  aliphatic radical or an aryl radical optionally substituted by alkyl and/or alkoxy groups, or, together with the nitrogen atom to which they are attached R 3  and R 4  may be closed to form a ring. The polyamine is prepared by reacting a polyester, polycarbonate, polyether or polythioether having terminal aryl carbonate groups (e.g. phenyl carbonate) with a diamine of molecular weight up to 500 of formula where R 1 , R 2 , R 3  and R 4  have the meanings given above, the R 1 -NH- group being different from the group at a temperature of 20-140‹ C., optionally in an inert solvent, and removing the (substituted) phenol produced. Suitable polymers are: (1) polycarbonate: reaction product of hexane- 1,6-diol polycarbonate with diphenyl carbonate; (2) polyester: products of diphenyl carbonate and adipic acid/hexane-1,6-diol polyester or adipic acid/hexane - 1,6 - diol/neopentyl glycol polyester; or (3) a polypropylene or polybutylene glycol ether with two C 6 H 5 O.CO.O- terminal groups. The diamine may be 2-(paminophenyl) - ethylamine; 3 - amino - 1 - (otolylamino) - propane; 3 - amino - 1 - (o - chlorophenylamino) - propane; p - methylamino - benzylamine; 3 - amino - 1 - dimethylamino - propane; 3 - amino - 1 - (p - chlorophenylamino)- propane; tetrahydronaphthylene - 1,5 - diamine ; 3 - amino - 1 - (p - tolylamino) - propane; or 3-amino-1-phenylamino-propane.
Patent GB-1022077-A (GB)
Title: Disengagement bearing for cluches, more especially of motor vehicles
IPC: F16D23/14
Filed: 1963-07-23
Abstract: 1,022,077. Controlling clutches; bearings. FICHTEL & SACHS A.G. July 23, 1963 [July 24, 1962], No. 29039/63. Headings F2A and F2L.  In a clutch-release ball-bearing supported on pivots 11 of a non- rotary ring 4 by a release fork 13, the ring 4 together with pivots 11 are formed of synthetic plastics, such as a polyamide, and have inlaid metal sealing- rings 5, 6 which enclose the outer bearing race 1. The sealing rings are formed around their outer periphery with two sets of lugs 14, 15 (Fig. 3, not shown), the latter being bent at rightangles for location around the bearing outer race 1, whilst the former are arranged radially and/or inclined to key the metal rings in the plastics ring 4, the rings being first assembled on the bearing after which synthetic plastics is sprayed therearound to form the ring 4. The bearing outer race 1 is also keyed fast in the plastics ring 4 by recesses and/or protuberances (Fig. 2, not shown) formed on the outer peripheral surface of the race. Hardened steel bushes 12 are arranged on the pivots 11, and an annular member 7, disposed in the inner race 3, carries a clutch disengaging thrust ring 8.
Patent GB-871761-A (GB)
Title: Improvements relating to aerial target practice systems
Inventor: LOBELLE MARCEL JULES ODILON
IPC: F42C13/04
Filed: 1958-09-10
Abstract: 871,761. Radar. M. L. AVIATION CO. Ltd. Sept. 10, 1959 [Sept. 10, 1958], No. 29046/58. Class 40(7) [Also in Group XXI] In an air-to-air target practice system the attacking aircraft Fig. 1, fires a stream of shells 2 having interspersed therewith shells 2<SP>1</SP> carrying a radio transmitter, the signals from which are picked-up by a receiver-transmitter 4 carried by the target aircraft 3 and control the transmission therefrom of signals 5, 6, indicative of the proximity of the shell to the target aircraft. The latter may be provided with four receiving aerials (not shown) sc positioned that a directional component in addition to a range component may be derived and transmitted as the signals 5, 6. Fig. 2 shows the mounting of, and Fig. 3 the circuit of, the shell mounted radio transmitter which comprises an electro-magnetic "buzzer" ener gized by a battery 15 and designed to operate at a frequency of about 1000 c.p.s., the output being taken from across the contacts 20 and fed via an inertia switch 31, 34 to separate insulated portions 12, 13 (which act as elements of a di-pole) of the nose-piece of the shell which is mounted in a conventional shell case 11.
Patent GB-644808-A (GB)
Title: Combination ironing board and steps
IPC: H01R13/15
Filed: 1947-10-31
Abstract: 644,808. Ironing-boards. NORBURY, F. Oct. 31, 1947, No. 29125. [Class 138 (ii)] [Also in Groups X and XIV] In a combined foldable ironing-board and household steps in which an upper platform member is foldably supported on a stepcarrying frame and a supporting frame, which frames are hinged at their upper ends to the platform and have tie-bars therebetween to limit the opening movement of the frames, an ironing-board is hinged at its one extremity to the platform at the same end as the supporting frame and has struts pivoted to its undersurface which engage means on the supporting frame when it is desired to maintain the board horizontal so that the upper surface of the board is then co-planar with the platform and extends from one end thereof. A step frame A, comprising treads 5 supported between uprights 3, is pivoted to the battens 2 of a platform 1, at 4. A supporting frame B comprising uprights 6, connected by tie-bars 9 to the frame A and braced by bars 8, Fig. 3, is pivoted to the platform 1, at 7. An ironing-board 10 is also pivoted to the side of the platform and can be maintained in a horizontal position by means of a strut frame comprising struts 12 pivoted to blocks 11 on the underside of the board 10, and a cross-batten 14, which abuts a cross-bar 13 on the frame B. The platform is provided with a T-shaped recess 18 in which is fitted a T-shaped sleeve board 16 which may be swung through 180 degrees, about a hinge 17. When the sleeve board 16 is out of the recess 18 it is supported on a T-bar 20 slidable in a slot 21 in the platform. The recess 18 provides a well, in which an iron can be placed, which well is lined with asbestos 19, Fig. 3, or other material. Instead of being hinged to the platform the sleeve board may be slidable therein. The board 10 may be folded against the frame B by raising the board to release the batten 14 from the cross-bar 13. The strut frame lies along the outer underside of the board 10 which is then secured to the frame B by means of a clip 15. The complete unit may be folded so that the platform 1 and the frame B tie against the frame A. When the unit is used for ironing a detachable table may be secured to the steps, comprising a rectangular slatted platform engageable at one end with an upper tread on the frame A and supported by a strut frame pivoted at one end to the platform and resting at its free end on a lower tread of the frame A, so as to support the platform in a horizontal position.
Patent GB-648034-A (GB)
Title: Improvements in or relating to table tennis and like bats
IPC: A63B59/04
Filed: 1948-11-10
Abstract: 648,034. Moulding game bats. HALEX, Ltd., and SNELL, S. W. Nov. 10, 1948, No. 29175. [Class 87 (ii)] [Also in Group XV] A table-tennis or like bat is moulded in one piece from superimposed layers A of sheet material such as creped paper impregnated with thermosetting plastic material and is formed with a face portion A<SP>2</SP> and a hollow tubular handle A<SP>3</SP>, the layers A<SP>1</SP> of sheet material in each circumferential half of the handle being continuous with the layers forming the adjacent half of the thickness of the face portion. The moulding is performed in a heated mould C, C<SP>1</SP>, a mandrel B being inserted between the sheets to form the handle which is afterwards closed by a cap D and may be ridged as at A<SP>8</SP>. The face portion is formed with a bounding rib A<SP>5</SP> and is faced on both sides with rubber E.
Patent GB-218554-A (GB)
Title: Improvements in or relating to electrodes for electric welding machines
IPC: B21J17/00
Filed: 1923-11-19
Abstract: 218,554. Hadley, C. A., and Rose Street Foundry & Engineering Co., Ltd. Nov. 19,1923. Heating by electricity.- Adjustable electrodes for machines used for heating rivets, bars, and the like comprise a disc rotatably mounted and having a stepped eccentric periphery. A disc electrode (preferably of copper) is mounted in a recess on an arm d, Fig. 2, the bolt being tightened so that the flat faces e make good contact with flats f on the arm. The periphery is stepped and eccentric with respect to the axial hole g, Fig. 3. The arms may be used in pairs, the work being held between two such electrodes. Alternatively, one such electrode is used on one arm in conjunction with a fixed or sliding electrode on the other arm. The periphery may be detachably connected to the boss for purposes of replacement.
Patent GB-1486012-A (GB)
Title: Traction motor controller circuit and method
IPC: H02P7/29
Filed: 1974-07-11
Abstract: 1486012 Automatic current control McCULLOCH CORP 11 July 1974 [11 July 1973]  29267/74 Heading G3R The current supplied to a D.C. motor from a D.C. source is regulated by a switch which is controlled by a Schmitt trigger arrangement responsive to predetermined relationships between sensed motor current and a reference signal. As shown in Fig. 7, the armature of a D.C. motor 12 driving an electric bicycle is connected in series with a transistor Q 1 and a current-sensing resistor 40 across a battery voltage V B . The bicycle throttle control is connected to a tap 22 on a potentiometer 20 to set a required current value which is - supplied to the inverting input 3 of an operational amplifier 24 forming a comparator which, together with a feedback resistor 26, functions as a Schmitt trigger circuit 28. The non-inverting input 2 of the amplifier 24 receives a signal from the current sensor 40, and the amplifier output 7 controls a transistor switching circuit 96 and pulse amplifier 100 to turn transistor Q1 on and off at upper and lower limit values of the motor current, the difference between the limit values being determined by the value of feedback resistor 26 which sets the hysteresis of the Schmitt trigger circuit 28.
Patent GB-1208086-A (GB)
Title: Improvements in or relating to signal translating devices
Inventor: STAUFFER NORMAN L
IPC: G01R13/34
Filed: 1969-06-10
Abstract: 1,208,086. Voltage measurement. HONEYWELL Ltd. June 10, 1969 [June 10, 1968], No.29314/69. Heading G1U. In order to adapt a relatively low bandwidth recorder to record a high frequency input waveform in such a way that the salient features of the waveform will be apparent, a translating device is coupled between the high frequency input and the recorder which incorporates a gated amplifier system operated under the control of a timing system to pass the input to maximum and minimum signal stores at spaced time intervals. Read amplifiers are associated one with each store, and these are operated during intervals between those during which signals are stored, to read out their corresponding store, the operation of each read amplifier being such as not to overlap the other. Subsequent to the operation of its associated read amplifier, each store is discharged. The system thus provides an output signal changing at much lower frequency then the signal input, but reproducing the amplitude changes between peaks and minima in the signal input. In one embodiment, Fig. 2 (not shown), the gated amplifier system incorporates two amplifiers which are operated alternately to pass signals respectively to a maximum and a minimum store. The read amplifiers are operated in the opposite phase to be operative only in the intervals when signals are not being passed to the associated store, to pass the maximum and minimum values alternately to a common output. In an alternative system, Fig. 3, two alternately gated amplifiers 42, 44 are used, each coupled to a pair of maximum and minimum stores 46, 48; 50, 52 respectively, the stores of each pair being charged simultaneously. Each store is coupled to a corresponding read amplifier 54, 56, 58, 60 respectively. The amplifiers for a given pair e.g. 54, 56 are operated in the alternate half cycle to the operation of the input gated amplifier e.g. 42. The read amplifier for the maximum store e.g. 54 is operated in the first half of this half cycle, that for the minimum store e.g. 56 is operated in the second half of this half cycle. Discharge switch circuits 68, 70, 72, 74 are operated to discharge the store at the ends of their respective read periods. The timing waves required to control all these operations are derived from a bi-stable circuit 76 responding to a suitable control frequency at 78, followed by binary divider circuits 80, 84, 86, 88 providing appropriate waveforms. A detailed circuit diagram showing one gated amplifier with associated maximum and minimum stores and read amplifiers is provided, Fig.6 (not shown).
Patent GB-1113522-A (GB)
Title: Apparatus for issuing information signals
Inventor: JONES GEORGE WILLIAM
IPC: G05B19/425
Filed: 1965-07-10
Abstract: 1,113,522. Recording and playback apparatus; associated working. RIPPER ROBOTS Ltd. 8 July, 1966 [10 July, 1965,] No. 29364/65. Heading G5R. [Also in Divisions G3 and H1] Apparatus for issuing information signals ,(e.g. spoken instructions) at predetermined reference points in the passage of a varying parameter (e.g. time, or the distance travelled by a vehicle or a machine tool) comprises a playback device (e.g. a tape recorder 2) for playing back a record programmed to include command signals of lengths proportional to the distances, in terms of the parameter, between respective adjacent reference points, and a differential switch (1) having a first part (3) driven in synchronism with the varying parameter (e.g. by a clock or the odometer of a vehicle), a second part (4), and switch contacts (32, 36) which operate to make or break a circuit only when the two parts (3, 4) are in a unique relative position of registration, the arrangement being such that at each reference point the first part (3) of the differential switch is brought to the registration position with respect to the second part (4), thereby operating the switch contacts to initiate scanning of the record by the playback device, the two parts of the differential switch are moved relatively to each other in response to the scanned command signal through a distance proportional to the length of this command signal, the sense of this relative movement being opposite to the sense of the relative movement caused by the driving of the first part (3) in synchronism with the varying parameter, and the scan is stopped, any information signals appropriate to the reference point being issued immediately before or after, or during, the command signal. As described, the command signal is a recorded tone of a particular frequency which controls the drive of the second part (4) of the differential switch (1) through a frequency-sensitive circuit (14).