baber/WOPTO huggingface dataset:
Patent GB-839850-A (GB)
Title: Improvements in the dynamic braking of dynamo electric machines
Inventor: CHOUDHURY SHAFI-UDDIN AHMED
IPC: H02P3/24
Filed: 1956-05-24
Abstract: 839,850. Control of A.C. motors. BRITISH THOMSON-HOUSTON CO. Ltd. April 25, 1957 [May 24, 1956], No. 16117/56. Class 38 (3). In the " running " position of a contactor 2, the primary winding P of a single-phase induction motor is supplied through contacts 6 from an A.C. source, whilst the secondary winding S is short-circuited through contacts 4. If a " brake " push-button is opened to de-energize the contactor-coil, a rectified component of current is supplied through rectifier 7 to the windings P, S, an alternating component flowing through capacitor 8. When the rotor has come to a standstill, the alternating component locks the rotor in a definite angular position with reference to the stator, and thus limits the current flowing in the motor windings. Braking may be effected by supplying the rectified component to one of the motor windings only, Fig. 2 (not shown). In this case, the other winding is directly connected across the A.C. supply terminals. The motor may be provided with polyphase primary and secondary windings which are connected to the single-phase supply. In a first arrangement, one phase of the primary winding is open-circuited, whilst the secondary winding has two of its phases short-circuited. In a second arrangement, two of the phases of both primary and secondary windings are short-circuited, Figs. 3, 4 (not shown). A further modification relates to a motor in which both windings are of the polyphase type and are supplied from a polyphase source. For motoring operation, the secondary winding is connected to a regulating resistor and, for braking, a circuit is completed from the A.C. source to two of the phases of the secondary winding and a rectified component of current is provided for the secondary winding by way of a rectifier and shunt capacitor. The primary winding remains connected to the A.C. source during these two operations, Fig. 5 (not shown). In another embodiment, the polyphase primary and secondary windings are connected in series with each other, a resistance being connected in each phase of the secondary winding to a star point formed by the secondary (rotor) windings. During motoring operation, the rectifier-capacitor combination is short-circuited as well as the rotor windings and their associated resistors. For braking, the short-circuiting contacts are opened, Fig. 6 (not shown). Specification 817,572 is referred to.
Patent GB-992875-A (GB)
Title: Sedimentation recorder
IPC: G01N15/05
Filed: 1963-04-24
Abstract: 992,875. Physiological measuring apparatus. C. M. BLUMENFELD. April 24, 1963 [May 8, 1962], No. 16135/63. Heading A5K. [Also in Division G1] A sedimentation recorder comprises a sample holder 42 for receiving a test tube 45 containing a liquid sample, e.g. blood, and a timer 22 for switching on a lamp 10 for or after a predetermined period of time to pass light through the sample on to a film 36 to obtain a record of sedimentation level either over the period or at the end of the period. Apparatus for making a continuous record over a period, Figs. 1, 2, includes a switch 18 operated by a time controlled cam 20 and controlling the supply of current to the lamp 10 and motor 30. The motor drives the film 36 at constant speed past the tube 45 disposed in a groove 46 in a translucent plastic block 48 held in an opaque support 50 with flanges 52 making a light-tight fit against the sides of case 12 and vertical slot 54 allowing light to enter the block 48 and diffuse into the sample. After the period preset on the times 22 the film is removed and developed to produce a curve, representing the rate of sedimentation and reference lines derived from graduation marks 66 on the tube. Apparatus for photographing the sedimentation level at the end of a preset period and for loading and developing the film, Figs. 4 to 8 (not shown) includes a photographic paper holder which is attached successively to a supply box for loading, a box containing a sample holder, lamps and timer for making an exposure and a developer tank, for producing a recorded image of the sedimentation rate. Clamping arrangements hold the film stationary for exposure to light from three lamps controlled by a timer which is set to determine the period of time before exposure and the duration of exposure.
Patent GB-1167617-A (GB)
Title: Improvements in or relating to Data Display Systems
Inventor: REID COLIN DAVID
IPC: G02B6/04
Filed: 1967-04-07
Abstract: 1,167,617. Levels; indicating - apparatus. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. April 2, 1968 [April 7, 1967], No. 16140/67. Headings G1F and G1J. [Also in Division G2] A data display system comprises a fibre optic bundle having input and output ends of different configurations, a light source and a member so movable relative to the input end as to produce a correspondingly movable discontinuity in the illumination thereof, variations in the position of this discontinuity being displayed in a different arrangement at the output end. In a first embodiment, Fig. 1, an arcuate input face 12a of a fibre optic cable 11 is illuminated by a source 13 via a slot 14 in an opaque disc 15 on a spindle 16 of an instrument indicator movement (not shown), and rotation of the spindle causes an arcuate movement of the exposed portion of the input face, which movement is displayed linearly on the linear output face 17a of the cable. Alternatively the movable member may be a segmented disc Fig.2 (not shown), a stepped disc Fig.3 (not shown) or a disc having transparent fitter segments of different colours Figs.4, 5 (not shown). In other embodiments, an image of the movable member is projected on to the input end by lenses (63a, 63b, Fig.6, not shown) or by a mirror (73b, Fig. 7, not shown). The output ends of the cables may be arranged to give a linear display Figs. 8, 9 (not shown) or so distributed as to appear as digits Figs. 10a, 10b, (not shown), or may be used to illuminate glass plates (20a, Fig.10a, not shown) having digits engraved thereon. The display system may be incorporated in a helmet for a diver or spaceman. In a positional orientator embodiment, Fig. 12 (not shown), to be mounted in a diver's helmet, the input ends of a fibre optic bundle (211) are distributed over a target hemisphere (215) of a plastics sphere (212) containing an opaque sensor ball (214) and the flat output end (213) of the fibre optic bundle has a graticule (217). When the sphere is tilted, the ball moves and its shadow moves over the output face in a manner indicative of the direction and degree of tilt. The sensor ball may be transparent or luminous.
Patent GB-442208-A (GB)
Title: Improvements in or relating to lockable free wheel transmission mechanism
IPC: F16D41/08
Filed: 1934-05-31
Abstract: 442,208. Lockable one-way clutches. PULSOMETER ENGINEERING CO., Ltd., and WARREN, R., Nine Elms Iron Works, Reading. May 31, 1934, No. 16274. [Class 80 (ii)] In a one-way roller clutch wherein dogs 6 on a member 5, splined on the driving shaft 4, are adapted to engage dogs 7 in the outer driven member 1 of the clutch, so as to lock the latter, balking means for preventing engagement of the dogs until the clutch is in the overrunning condition, so as to prevent jamming, comprise a ring 16 which is mounted on the member 5 with limited angular play and which has dogs 17 similar to the dogs 6. The ring 16 is biassed by a spring 19 so as normally to lag behind the member 5. Thus, the member 5 can be moved so far as to engage the dogs 17 with the dogs 7, but further movement to engage the dogs 6 with the dogs 7 is prevented until the member 1, and with it the ring 16, overruns the member 5. The inner member 3 of the clutch has limited angular play on the shaft 4 and has teeth 12 coacting with teeth 15 on the member 5 so as to prevent engagement of the dogs 17 with the dogs 7 unless the clutch is in driving condition. The member 1 may be extended beyond the dogs 6 and be provided with a second set of dogs 25 with which the dogs 6 can be brought into engagement without any balking action by a movement of the member 5 to the left. Alternatively, means as described in Specification 442,279 may be provided for enabling the balking action of the teeth 12, 15 to be overcome when desired. Specification 441,613 is referred to in the Provisional Specification.
Patent GB-1064360-A (GB)
Title: Differential gear mechanism
IPC: F16H48/22
Filed: 1965-04-15
Abstract: 1,064,360. Differential gear. EATON YALE & TOWNE Inc. April 15, 1965 [June 8, 1964], No. 16359/65. Heading F2D. In a motor-vehicle limited-slip bevel-type differential gear having clutch packs, preloaded by springs 38 reinforced by bevel tooth reaction, comprising interleaved steel clutch discs 54, 55, drivingly connected to the differential casing 11 and side wheels 39 respectively, floating asbestos, or copper, discs (56) are arranged between the clutch discs (54, 55) (Fig. 4, not shown) to minimize clutch " stick-slip " effect and hence reduce chatter, noise and wear of the discs, the discs (56) providing a rising dynamic coefficient of friction which increases more rapidly at low slip speeds than at higher slip speeds as illustrated in graphical form (Fig. 6, not shown). The discs (56) additionally serve as shims to accurately control the clutch pack width of the discs (54, 55) which are facially patterned at (57) as illustrated in Fig. 5 (not shown). The inner clutch discs (55) are directly splined to the side wheels 39 whilst the outer discs (54) are connected to the casing by pairs of semicircular lugs (59) seated in U-shaped liners (61) mounted in correspondingly shaped recesses (60) in the casing 11 (Fig. 2, not shown).
Patent GB-529625-A (GB)
Title: Improvements in and relating to electric inverting systems
IPC: H02M7/51
Filed: 1939-06-05
Abstract: 529,625. Converting. FRIEDLANDER, E. June 5, 1939, No. 16456. Convention date, June 4, 1938. [Class 38 (ii)] In an electric converter system such as an inverter system wherein (1) the alternating voltage is variable with the wattless current flowing between the inverter and the A.C. network so that the capacitative wattless power taken by the A.C. circuit decreases with rising alternating voltage and (ii) energy storing devices depending on frequency-i.e., rotating machines-are connected on the A.C. side, the means for effecting commutation from one anode or contact to the next in the inverter are arranged to advance the instant of commutation as the frequency of the output increases thereby preventing a " short circuit" effect through the energy storing device. For self excited inverters it may be arranged to vary the advance rapidly with increased frequency. In one form a saturated grid transformer T, Fig. 4, is connected through resistances R to the A.C. voltage of the inverter, condensers are arranged in parallel with the series resistances. Variation in voltage between the grid and anode voltages may be compensated; a rectifier system M, Fig. 5, is connected to the resistances R which all have condensers in parallel as in Fig. 4, the system being shunted by a choke C. To correct independently controlled inverters for temporary differences between the anode and grid frequencies, a grid transformer G, Fig. 6, is supplied from a source f through ah intermediate transformer z energized from the A.C. side of the inverter system. Frequency changing from one A.C to another may be similarly controlled.
Patent GB-222196-A (GB)
Title: Improvements in and relating to telephones
IPC: H04R13/02
Filed: 1923-06-25
Abstract: 222,196. Bergmann, F. P. June 25, 1923. Diaphragms.-For a miniature telephone receiver the diaphragm o is clamped between two wire rings n which make practically only linear contact therewith. An armature p comprising a light iron plate having a boss is secured at the boss to the centre of the diaphragm by a minute rivet so that its contact with the diaphragm approximates to a point.
Patent GB-842459-A (GB)
Title: Motor stabiliser
IPC: H02P23/00
Filed: 1957-05-24
Abstract: 842,459. Automatic speed-control systems. CREED & CO. Ltd. May 24, 1957 [May 28, 1956], No. 16528/57. Class 38 (4). The speed and phase of a synchronous motor 10 driving a facsimile drum 11 is maintained by controlling in a saturable reactor phase modulator 15 the phase of the supply to the motor from a frequency standard 13 in accordance with the phase difference between a signal from a tone generator 12 and a signal derived by a frequency multiplier 9 from the frequency standard. The discriminator output is applied to an error voltage amplifier, Fig. 2 (not shown), through a network providing integral and differential components, and the phase correction is effected by a saturable reactor. In a modification for controlling an induction motor which is described with reference to Fig. 4 (not shown), the frequency standard is connected directly to a phase detector, the output from which controls a saturable reactor to phasemodulate the induction motor supply.
Patent GB-529972-A (GB)
Title: Improvements in electric discharge lamps
IPC: H01J61/12
Filed: 1939-05-31
Abstract: 529,972. Discharge lamps. BOSCH, F. J. G. VAN DEN. May 31, 1939, No. 16610/38. Drawings to Specification. [Class 39 (i)] A discharge lamp contains a rare gas or gases together with nitrogen and hydrogen, the quantity of hydrogen being of the order of 3 per cent of the combined amount of nitrogen and hydrogen. The rare gas may be, for example, neon, helium, krypton or argon or mixtures thereof, the combined amount of nitrogen and hydrogen in the case of neon being of the order of 20 to 28 per cent of the total gaseous content and 12 to 20 per cent in the case of argon. Thus, the combined nitrogen and hydrogen when neon is used may be 20 per cent and 28 per cent respectively for a 110 and a 220 volt lamp and where argon is used the nitrogen and hydrogen content may be 12 and 20 per cent for these voltages respectively. Forms of lamps are shown having two overlapping spaced rod-like and wire electrodes, and alternating spaced parallel rod-like electrodes, a resistance being mounted within the lamp in series with one of the electrodes in each case. One or both of the electrodes may be coated with an emitting substance, such as barium carbonate.
Patent GB-771154-A (GB)
Title: Improvements in or relating to the preparation of benzene hexachloride
Inventor: TWIEHAUS HOBERT CARL
IPC: C07C17/02
Filed: 1955-06-09
Abstract: Benzene hexachloride is prepared by catalytic reaction of benzene and chlorine, the reaction mixture being in contact with a ferrous surface, by maintaining the concentration of water in the reaction medium below 50 parts per million by weight, whereby the substitution chlorination reaction is inhibited.  The water content may be kept below the required limit by carrying out the reaction in an airtight reaction system and by the use of a dehydrating agent such as phosphorus pentoxide, phosphoric acid or calcium hydride in the reaction zone.  In an example, a mixture of benzene and methylene chloride which has been dehydrated by azeotropic distillation is chlorinated to benzene hexachloride in a steel reaction vessel in the presence of phosphorus pentoxide under irradiation by actinic light, using a continuous process, which is described by reference to drawings.
Patent GB-219152-A (GB)
Title: Improvements in friction brakes for vehicles
IPC: F16D51/22
Filed: 1923-06-27
Abstract: 219,152. Webb & Co., Ltd., H. C., and Atkinson, G. L. June 27, 1923. Blocks and shoes acting on drums; energy-absorbing elements; covers for brakes. - In brakes particularly for motor-cycles and of the internal expanding type, the drum is provided with an endless or annular band of brake lining or fabric, and the engaging surface of the coacting brake member is of metal. Fig. 2 shows internal shoes c having metallic surfaces for engagement with a lining b which may be of braking fabric secured as by rivets or screws to the drum a which rotates. The lining b may be of less width than the drum, so that it may assist in forming a substantially weather-tight joint with the stationary plate d upon which the shoes are pivoted. The drum may instead be stationary and the shoes rotate. According to the Provisional Specification, the invention may be applied also to brakes of the external band type.
Patent GB-138266-A (GB)
Title: Improvements in or relating to sound controlling devices for gramophones and other like instruments
IPC: G10K13/00
Filed: 1919-07-03
Abstract: 138,266. Balcombe, A. J. July 3, 1919. Sound-directing appliances.-A sound-controlling valve for the conduits of gramophone and like instruments comprises a plate m so bent and proportioned as to fit snugly against the inner surface of the conduit e when in its fully open position, and to completely close the conduit when in the position shown. The plate is carried by an arm w pivotally mounted, on the conduit and passing through a slot s therein. A rubber or like disk p is mounted on' the plate, and preferably projects beyond its edge so as to render it sound tight when clesed. Means, such as a Bowden transmission, may be provided for controlling from a distance, and the valve may be retained in any desired position by a spring catch on the arm w.
Patent GB-102384-A (GB)
Title: An Improved Copying Lathe.
Inventor: PLANE LOUIS AUGUSTE ANNET
IPC: B23Q35/10
Filed: 1916-11-21
Abstract: 102,384. Plane, L. A. A. Nov. 11, 1915, [Convention date]. Lathes for turning the body, nose, and band-groove of'shells are provided with a female driving-centre a and with ball thrust-bearings at b, d for the headstock and tailstock spindles. The slide-rest has a roller maintained by springs j against, a templet h, and is provided with a tool-turret. The saddle has a power traverse by a screw directly driven from a sliding pinion m on the spindle, and a quick return from a hand-wheel o. Lathe centres.-The centre a is lined with leather or fibre.
Patent GB-581232-A (GB)
Title: Improvements relating to sealed bearings
IPC: F16C33/78
Filed: 1944-09-02
Abstract: 581,232. Lubricating bearings. FISCHER BEARINGS CO., Ltd., ECCLESTON, J. T., and EMMERTON, J. T. Sept. 2, 1944, No. 16773. [Class 12 (i)] [Also in Group XXVI] The space between inner and outer bearings is sealed by a metal ring 8a with a slit periphery 10a initially of dished form pressed flat into a groove 7a. A seal 12 of flexible material, e.g., synthetic rubber may be held compressed in the groove by the plate, or bonded to the plate; or held compressed between two plates in a wide groove. Specifications 30,487/09, 331,172, [both in Class 12 (i)], and 448,149 are referred to.
Patent GB-762411-A (GB)
Title: Improvements relating to conveyors
IPC: B65G19/14
Filed: 1954-06-08
Abstract: 762,411. Endless push-plate or scraper conveyers. DALGLISH, J. March 11, 1955 [June 8, 1954], No. 16780/54. Class 78 (1). In a push-plate or scraper conveyer having its conveying element composed of sections, each section including a push plate or scraper and one or more connecting members, and travelling in a conduit or channel, successive sections are connected to one another by universal joints having part-spherical bearing surfaces. In one form, Fig. 2, a circular push-plate 19 having a tyre 20 has a bearing member 27 lubricated by a nipple 30 or alternatively made of self-lubricating material. This member has a part-spherical inner surface which co-operates with a corresponding surface of a cup-shaped head 28 formed on one end of a connecting rod 12 the other end 25 of which has been passed through the bearing member whereby a threaded end portion 22 may be screwed into a plug 21 which has been screwed into a previously assembled push-plate and connecting rod assembly. Beyond the threaded portion 22 a hemispherical boss engages. the inner partspherical surface of the head 28 of the previously assembled connecting rod to complete the joint. A taper pin 24 is passed through a hole drilled through the parts 19, 21 and 22 to lock them in position. The plug 21 acts as a driving abutment for engagement by bifurcated teeth 32 of a sprocket wheel (not shown) a plurality of which may be disposed along the conveyer path and which operate in slots in the conduit beyond the discharge point or points for the material conveyed. The sprocket teeth may be equipped with rollers or balls to reduce friction. Material is kept away from the joints by rubber seals 31. In a second form, Fig. 3, each pushplate 33 is assembled between a pair of connecting rods 35, 37, the latter having a ball 39 engaging a socket 40 in the former. A bearing member 41 having a part-spherical inner surface and made of self-lubricating material completes the joint and is protected by a flexible seal 42, the member and seal being held in place by a threaded ring 43 screwed on the socket 40 and locked by a nut 44. The rear face of the socket 40 form the driving face for the sprocket teeth which are shaped to avoid contact with the flights. A conduit for either form may be flexible and comprise an armoured base lined with rubber, the tyres on the push-plates being of steel.
Patent GB-579264-A (GB)
Title: Improvements in or relating to rotary fluid pumps, compressors or the like
IPC: F04C18/32
Filed: 1944-09-04
Abstract: 579,264. Rotary pumps. MERCER, A. A. Sept. 4, 1944, No. 16806. [Class 110 (ii)] A gyratory piston 16, on a crank-shaft 17, has slippers 35 which bear on a fixed abutment 36, and is provided with axial holes 39, 40 which carry non-return sleeve valves allowing com-- munication between ovoid-shaped inlet ports in each end cover, and outlet ports in each end cover. One end cover 4 has extension ports 12, 13, and ducts 14, 15, and ports 10, 11, which communicate, through the piston, with the inlet and outlet ports in the other end cover. Lubrication ports 47, 48 communicate with the recess 33 and lubricant is forced by the slippers 35 to the crank pin and other moving surfaces by way of holes in the bush 29.
Patent GB-218102-A (GB)
Title: Improvements in or relating to apparatus for utilising tidal energy
IPC: E02B9/08
Filed: 1924-03-21
Abstract: 218,102. Weaver, L. W. March 21, 1924. Tidal energy, utilizing.-In apparatus comprising impounding and discharge basins a., c, the basins are at the same level, the basin a has inlet and outlet sluices at high water level, the basin c has inlet and outlet sluices at low water level, and a hydro-electric generating station is arranged between the basins. Supplementary impounding and discharge basins may be provided.
Patent GB-579563-A (GB)
Title: Improvements in and relating to grinding tool
IPC: B24D7/04
Filed: 1942-11-30
Abstract: 579,563. Grinding-wheels &c. HARVEY, K. I. Nov. 30, 1942, No. 17010. [Class 60] [Also in Group V] A grinding.. wheel &c. comprises bonded abrasive grits, and may have an annular, radial or other reinforcement 15 of steel &c. There may be a central nut 12, or several nuts adjacent one face, for mounting the wheel, the nuts being so shaped as to resist their being pulled out of the wheel.
Patent GB-1096643-A (GB)
Title: An internal combustion engine cylinder made of a light alloy and a method for making such cylinder
IPC: F02F1/18
Filed: 1965-04-22
Abstract: 1,096,643. Cylinders. ALPATA PATENTVERWERTUNGS A.G. April 22, 1965 [April 23, 1964], No. 17059/65. Heading F1B. A light alloy cylinder A has a ring C of heatresistant material, such as stainless steel, and a layer B of wear-resisting material such as chromium. The ring C may have a projection C 1  integral therewith or attached thereto.
Patent GB-771156-A (GB)
Title: Improvements in or relating to rotating beater devices
IPC: A47J43/07
Filed: 1955-06-14
Abstract: 771,156. Rotary whisks. STAMM, B. June 14, 1955, No. 17061/55. Class 86 A beating whisk for attachment to the spindle of a domestic mixing &c. machine comprises a plurality of wire loops 7 which depend from a fitting 4 having a bayonet socket 2 for connection to said spindle and are so attached to the fitting that one at least may swing outwardly under the influence of centrifugal force. The loops, preferably of resilient wire, &c., are secured to the fitting 4 by a disc 5 with retaining screw 6, the face of the fitting having spaced cut-away portions to receive the ends of the loops.