baber/WOPTO huggingface dataset:
Patent GB-642130-A (GB)
Title: Pulse-discriminating system
IPC: H04N5/08
Filed: 1947-07-10
Abstract: 642,130. Television receivers. HAZELTINE CORPORATION. July 10, 1947, No. 18359. Convention date, July 20, 1946. [Class 40 (iii)] [Also in Group XL (c)] A circuit for separating pulses having a given repetition frequency or one harmonically related thercto from others in a train comprises a pair of reciprocally coupled valves associated with a delay network so that an input pulse triggers and resets the pair of valves to produce an amplified output pulse and a pulse reflected from the delay network repeats the sequence. Fig. 1 shows the use of such a circuit to separate the line and frame synchronizing signals in a television receiver. The combined synchronizing signals after the picture signal has been removed in stage 18 are applied to the frame time base generator 21 and to the synchronizing separator 20 as negative-going pulses L, Fig. 2(A). The flip-flop circuit comprising valve 30 which is normally conducting and valve 31 which is normally cut-off is triggered over and reset by the pulse L to produce an amplified output pulse P, Fig. 2(D), at the anode of valve 31. The positive pulse L1, Fig. 2(B), produced at the anode of valve 30 travels down the delay line 36, 37 and after reflection at the shorted end 39 appears as a negative pulse L2, Fig. 2(B), at the anode of valve 30 delayed by half of a line pulse interval from pulse L1. The negative pulse applied to valve 31 which is nearly at cut-off produces a small positive pulse P1 at its anode, Fig. 2(D). The negative pulse L2 is also reflected from the shorted end of the delay line as a positive pulse which renders valve 31 conducting to give a negative-going pulse P2 at its anode, Fig. 2(D). This pulse appears at the anode of valve 31 with the same polarity and at the same instant as the pulse produced by the next line synchronizing pulse of the train so that the effect is additive to produce a pulse having an amplitude which is greater than that of the frame synchronizing pulses. The large amplitude pulse is selected by an amplitude filter and is used to trigger the line time base 19. Equalizing pulses of half the line pulse duration which occur at double line frequency during the intervals between successive frames only appear in the output at increased amplitude when they occupy a position normally occupied by a line synchronizing pulse, Fig. 3 (not shown). Specification- 20116/47 (as open to inspection under Sect. 91) is referred to.
Patent GB-982398-A (GB)
Title: Scraper conveyor
IPC: B65G19/10
Filed: 1961-05-19
Abstract: 982,398. Scraper conveyers. STAMICARBON N.V. May 19, 1961 [May 20, 1960], No. 18414/61. Heading B8A. The arms 5 of a stirrup-shaped coupler link 3 for connecting lengths of chain in a doublechain scraper conveyer are made at an angle of e.g. 5 degrees so that when a scraper flight 6 is bolted within them the inside faces are brought parallel in contact with the scraper flight co-operating faces thus introducing compressive stress at points A, A<SP>1</SP> where neighbouring links 4 are attached. This reduces the maximum working stress of the link when the chain is tensioned in use, increasing the working life.
Patent GB-250077-A (GB)
Title: Improvements relating to carriage returning mechanism for typewriting and like machines
IPC: B41J11/24
Filed: 1925-07-20
Abstract: 250,077. James, R. W., (Remington Typewriter Co.). July 20, 1925. Carriage - returning mechanism; tabulating- mechanism; locking- devices. - In a typewriter or like machine equipped with a tabulator and power mechanism for returning the carriage, an interlock is provided for preventing simultaneous operation of the tabulator and the carriage - returning mechanism. The Figure shows a typewriter equipped with (1) the carriagereturning mechanism described in Specification 247,144 and comprising a spring-urged bell-crank 50 adapted on being released to close the circuit of a motor 33 and to cause a clutch-member 46 to couple the carriage 5 to the motor, and (2) a tabulator comprising denomination levers 12 and a carriage-releasing link 25 operated by a universal bar 17 in the path of the denomination levers. The link 25 is now provided with an arm 70 cooperating with a member controlled by the bellcrank spring 55, the member preferably consisting, as shown, of a projection 48 at the end of the bell-crank. Normally the projection is not obstructed by the cam, but if any of the tabulating-keys 16 are operated the link is depressed and the arm engages the projection and prevents the bell-crank from rocking to initiate carriagereturn. If any of the tabulating-keys are operated during carriage-return, the extra resistance caused by the bell-crank warns the typist not to complete the movement of the key; if the typist ignores the warning, the bell-crank is restored to normal position and the carriage stops. The arm is adjustably mounted on the link, preferably by means of screws 71 passing through vertical slots 72 in a lug on the arm.
Patent GB-126342-A (GB)
Title: Improvements in or relating to Aeroplanes.
Inventor: MOORE EDWIN HENRY
IPC: B64C3/18
Filed: 1916-12-28
Abstract: 126,342. Moore, E. H. Dec. 28, 1916. Planes, arrangement of; framework.-In aeroplanes having two or more planes, gusset plates are used to connect the struts to the ribs, spars, &c. of the planes and to the fuselage or nacelle and chassis whereby the use of some or all of the usual wire stays is obviated. The gusset plates may be embodied or enclosed in the structure of the planes, fuselage, &c., to reduce the resistance, and may be employed in the structure of the rudder, elevator, &c, Fig. 9 illustrates the application of gusset plates C' for connecting L-section struts X, K<1> to the upper and lower planes L, L' so as to be enclosed to a large extent in the structure of the planes. Reference has been directed by the Comptroller to Specifications 4292/12, 24872/13, 26147/13, and 7122/14.
Patent GB-1146447-A (GB)
Title: Denture base material
IPC: A61K6/083
Filed: 1966-04-27
Abstract: 1,146,447. Moulding dentures. DENTISTS SUPPLY CO. OF NEW YORK. 27 April, 1966 [27 April, 1965], No. 18555/66. Heading B5A. [Also in Division C3] A polymeric denture base material consists of dry porous pellets comprised of particles and being convertible to a mouldable dough. The pellets are produced by melting pre-pigmented particles of the base material e.g. methyl methacrylate, with a solvent e.g. alcohol, to form a slurry with which a plurality of mould cavities are filled, heat then applied to dry out the solvent and form a porous pellet in each cavity. Batches of pellets of varying shades are mixed, wetted with a monomer of the material and kneaded to form a dough which is moulded to form a denture having a mottled appearance simulating natural gum.
Patent GB-1390606-A (GB)
Title: Vehilce detector systems
IPC: G08G1/042
Filed: 1971-06-02
Abstract: 1390606 Detecting vehicles; controlling traffic signals PLESSEY CO Ltd 3 Aug 1972 [2 June 1971] 18562/71 Heading G4Q A vehicle detection system, which may be used for controlling traffic signals, comprises a conductor 1 which can be supplied with pulse signals from a pulse generator 2, and a detector which is arranged to sense signals induced in the conductor 1 due to the decay of a magnetic field produced in the vicinity of the conductor 1 and to produce an output signal when a vehicle is in the vicinity of the conductor 1. Conductor 1, which normally is buried in the road, can be laid diagonally across the traffic flow to facilitate the detection of bicycles. The pulses are fed to the loop via an amplifier 3. If conductive metal objects are present in the vicinity of the loop, signals induced in the loop as a result of eddy currents decaying in the objects are sensed by preamplifier 4 whose input is protected from large current pulses by diodes 6, 7 or a Zener diode. The output signals from amplifier 4 are sampled to establish a reference signal which takes account of low frequency loop noise, and a signal which, when compared in comparator 8 with the reference signal, provides an indication of the presence or absence of a vehicle moving through the vicinity of the loop. An averager 16 which provides an output signal which only registers signal increases relative to an ambient signal lever prevents vehicles which are parked in the loop vicinity from being taken into account. A number of loops, each associated with its own detector circuit, may be fed from a single pulse generator and drive amplifier (Fig. 3, not shown).
Patent GB-780010-A (GB)
Title: Improvements in or relating to electrical follow-up systems
Inventor: MILSOM FREDERICK ROGER
IPC: G05D3/16
Filed: 1954-06-24
Abstract: 780,010. Self-balancing bridges; liquid gauges. SMITH & SONS (ENGLAND), Ltd., S. June 24, 1955 [June 24, 1954], No. 18591/54. Class 37. [Also in Group XXXIX] Relates to a self-balancing bridge type of liquid volume capacitor/gauge in which bridge output is continuously applied through one or more magnetic amplifiers to operate a motor which re-balances the bridge and indicates liquid volume. The invention provides apparatus in which the bridge is fed with an A.C. carrier frequency modulated at sub-carrier frequency and the effects of amplifier drift are eliminated. In the drawing oscillator 7 energizes bridge 9 and one of the phase windings of bridge zeroizing motor 8 at 400 c/s. modulated at 10 c/s. so that bridge 9 having as one arm a liquid volume capacitor produces as output the 400 c/s. carrier modulated by a sub-carrier frequency at 10 c/s. which is itself modulated in accordance with bridge outof-balance due to liquid volume variation. The output from bridge 9 is applied to a phasesensitive demodulator 11 together with a reference phase 400 c/s. input so that demodulator 11 feeds 10 c/s. modulated by bridge outof-balance into magnetic amplifier 16 and the latter delivers 400 c/s. modulated at 10 c/s. and by bridge out-of-balance into the 10 c/s. tuned input of a second magnetic amplifier stage 20 and the 400 c/s. output of stage 20 modulated at 10 c/s. and by bridge out-of-balance is taken through impedance matching transformer 22 into a bridge rectifier 23 whose output in series opposition with that of a similar bridge rectifier feeds input windings 25, 26 of third magnetic amplifier stage 27 and also supplies feed-back through a low-pass filter network 28 to the input of first amplifier stage 16. The network 28 is such that substantial negative feed-back is provided at D.C. and frequencies well below 10 c/s. but practically no feed-back is provided at 10 c/s. Thus the first and second stages 16, 22 are kept within the linear parts of their characteristics and the combined D.C. output of rectifier bridges 23, 24 stays very close to zero when the output of bridge 9 is zero. The third amplifier stage 27 comprises two sections 30, 31 in push-pull feeding an auto-transformer 32 which is connected to the second phase winding of motor 8. The output of stage 30 applied to the second phase winding of motor 8 is a 400 c/s. carrier in quadrature with the voltage applied to the first phase winding of motor 8 and moduloted with the 10 c/s. sub-carrier and also modulated in accordance with the bridge out-of-balance, the couplings in the successive amplifier stages produce a total lag of 180 degrees in the 10 c/s. sub-carrier. The presence of sub-carrier modulation in the output of amplifier 27 causes the motor 8 to produce a fluctuating but unidirectional torque whereas any other modulation such as would be caused by amplifier drift causes it to produce a fluctuating torque of mean value zero.
Patent GB-1291122-A (GB)
Title: An improvement in or relating to signalling units for draft controlled tractor power lift mechanism
Inventor: MOORHOUSE STEPHEN
IPC: A01B63/112
Filed: 1969-04-11
Abstract: 1291122 Tractor power lift mechanism DAVID BROWN TRACTORS Ltd 9 April 1970 [11 April 1969] 18611/69 Heading A1P A tractor power lift double acting draft signalling unit, 'being an improvement to the invention claimed in claim 1 of Specification 1141719, in which three sensitivity settings can be selected, comprises a housing 10 with an axially slidable but non-rotatable plunger 11 to which the first end of an upper tractor hitch link can be universally connected at lugs 12. A sleeve 22 slidable on plunger 11 has an outwardly extending toothed flange 23 situated slightly towards one end which is engaged with a pinion 23 used to rotate sleeve 22, via lever 28 into any one of three positions spaced 21‹ apart and to hold it there by spring detent means engaging grooves in the pinion boss 29. Two helical springs 31, 32, or in a modification Belleville washers of differing stiffness, surround sleeve 22 and abut respectively against annular plates 33, 34 which have a limited axial but non-rotational movement. Plate 33, has eight radially extending dog teeth, plate 34 has four dog teeth with gaps which are substantially twice the size of the gaps in plate 33. Four equally spaced dog teeth 25 are provided on each end of sleeve 22 which can fit into the gaps between the dog teeth on plates 33, 34. In operation, when both plates 33, 34 have gaps aligned with dog teeth 25 on sleeve 22, both springs provide opposition to the load applied to plungers 11, but when the teeth on one or the other plates 33, 34 abut teeth 25 and are stopped from axial movement thereby either spring 33 or 44 provides, alone, opposition to the load. In a modification the unit may be made single acting, to respond either to tension or to compression in the upper hitch link.
Patent GB-401797-A (GB)
Title: Improvements in bearings for vertical shafts
IPC: F16C33/10
Filed: 1932-07-01
Abstract: 401,797. Lubricating bearings. YOUATT C. S. and RHODES, BRYDON, & YOUATT, Ltd., Goosey Mount Street, Stockport. July 1, 1932, No. 18622. [Classes 12 (i), 12 (ii), and 12 (iii).] A bearing for vertical shafts comprises a sleeve a of a metal, such as graphite - impregnated - bronze, which is permeable by oil, and a bearing housing c having one or more slots or pockets d from which lubricant passes through the sleeve to the bearing surface, where it is carried upwards by means of one or more spiral grooves in the bearing surface of the sleeve or of the shaft itself and returned to the pockets d. Inserts b of material such as cane which is permeable by oil may be used instead of a porus sleeve a. In Fig. 1, a single spiral groove f is arranged in the bearing surface of the sleeve a. The pockets d contain absorbent material such as wool yarn. Excess oil from a supply fitting h is thrown clear of the pockets d by a collar i and is drained off at j.
Patent GB-1209203-A (GB)
Title: A process for reducing the porosity and/or discoloration of material produced in an arc furnace from a melt containing aluminium oxide
Inventor: ROMWALTER ALFRED
IPC: C03C1/00
Filed: 1968-04-19
Abstract: 1,209,203. Treating Al 2 O 3 -containing melts; fused refractories. MAGYAROVARI TIMFOLD-ES MUKORUNDGYAR. 19 April, 1968 [19 April, 1967], No. 18650/68. Headings C1A and C1J. The porosity and/or discoloration of aluminacontaining material obtained by arc-melting with carbon electrodes is reduced by maintaining a melt of the said material, comprising 0À5- 44% by weight of one or more oxygen-containing compounds of Cd, Pb, Sb or Zn, for 10-120 minutes at above the melting point to react with free or combined carbon to form and evaporate voltile substances. Preferably the melt is stirred prior to the period of operation. The oxygen-containing compounds may be incorporated in the mixture used to form the melt containing Al 2 O 3 , or may be added to the melt itself in one or more batches; Different additives, which may include compounds of elements other than Cd, Pb, Sb or Zn, may be added in order of their increasing effectiveness in oxidizing carbon, e.g. MgO followed by ZnO. The temperature may be 50-150‹ C. above the melting point during the process.
Patent GB-1197158-A (GB)
Title: A Novel Process for Producing 1,4-Benzodiazepine-2-One Derivatives
IPC: C07D243/24
Filed: 1969-04-11
Abstract: 1,197,158. Benzodiazepine derivatives preparation. SUMITOMO CHEMICAL CO. Ltd. 11 April, 1969 [15 April, 1968], No. 18660/69. Heading C2C. Compounds of the general formula (R 1,2,3  = H or halogen, n = 0 or 1) and their salts are prepared by reacting a compound of of the formula or salt thereof with an oxidizing agent, optionally followed by salt formation. Reference has been directed by the Comptroller to Specification 972,968.
Patent GB-752859-A (GB)
Title: Vapor phase process for the manufacture of diphenylamine
IPC: C07C209/64
Filed: 1954-06-25
Abstract: Diphenylamine is manufactured by a continuous vapour phase process which comprises passing undiluted aniline vapour at superatmospheric pressure into a reaction chamber maintained at 400-550 DEG  C. and containing a non-base-exchanging catalyst such as alumina, titania, or bauxite; condensing the effluent from the reaction chamber, and separating the diphenylamine formed from excess aniline and ammonia. Specified pressures are 15-100 p.s.i.g.  The aniline vapour is passed at a rate of between 15 and 2000 parts by weight of liquid aniline per hour per 100 parts by weight of catalyst.  The aniline feed is stopped after a suitable period and air or other oxygen-containing gas is passed through the catalyst bed to burn off accumulated tar and carbonaceous matter, and regenerate the catalyst.  In examples the process is described using various pressures, temperatures, feed rates and catalysts.  Specification 473,739 is referred to.
Patent GB-682629-A (GB)
Title: Improved carburetter for internal combustion engines
IPC: F02M7/08
Filed: 1950-07-27
Abstract: 682,629. Spray carburetters. GENERAL MOTORS CORPORATION. July 27, 1950 [Aug. 9, 1949], No. 18770/50. Class 7 (iii). A carburetter has an inverted U-shaped fuel delivery passage, for preventing waste of fuel due to vapour formation, one limb 75 extending into the float chamber 31, the second limb 106 leading to the idling fuel orifice, and the cross-limb 97 forming the main fuel nozzle and having air inlets 103-105 and an atomizing restriction 120 in the nozzle part 122. At idling, fuel is drawn through a jet 76 and passages 75, 97, 106, to the idling orifice, aerating air being added to the fuel in the passage 97 through orifices 103-105, Fig. 23, and through the main nozzle 122. During normal running the suction at the Venturi 50 draws the fuel through the nozzle 122, atomization being assisted by the air flow through the orifices 103- 105. The carburetter body consists' of a throttle body part 30 separated by a heat insulating gasket 37 from a nozzle body portion 31 formed integral with the float chamber and separated by a heat insulating gasket 46 from a choke body part 32 carrying the choke valve 131 and forming a cover for the float chamber. The jet 76 is carried by a member 33, Fig. 7, bolted to the part 32 and carrying a power enrichment jet 85 opened at high powers by a piston 87 actuated by intake manifold suction. An accelerating pump, fed through a fuel filter, comprises a piston 171 resiliently connected to a pump-actuating rod 178 connected to the throttle valve and having a normally open fuel vapour escape passage 208 which is closed by a ball valve 207 when the pump is actuated. The vapour escapes through the pump bore 186 and a passage 210 to the carburetter inlet. A lever 135, Fig. 5, freely pivoted on the choke valve shaft 130 and connected thereto through a spring 134, is formed with a cam part 161 co-operating with a lever 152 carrying a stop 151 limiting the closing position of the throttle valve. When the lever 135 is rotated anti-clockwise to close the choke valve, a projection 163 moves lever 152 to set the throttle valve in the fast idling positive for starting, the cam part 161 allowing the throttle valve gradually to close to the normal idling position when the lever 135 is returned to its normal position. The body part 30 is provided with a drilling adjacent the throttle valve for the attachment of a pipe leading to a suction-actuated spark retard device.
Patent GB-319826-A (GB)
Title: Improvements in or relating to prepayment devices for use with electric meters or the like
IPC: G07F15/10
Filed: 1928-06-29
Abstract: 319,826. Fry, C. E. June 29, 192S. Bell signals. - In an electricity prepayment meter warning is given before the prepaid supply is consumed by closing intermittently a pair of contacts 5, 6, controlling a bell circuit. A weight 7 is held in the raised position as shown by a catch 14 on one end of a trip lever 2. The other end of the lever 2 co-operates with the stepped edges 3a of a notch in a control disc 1 which is set forward on prepayment and is returned by the meter. When the trip lever engages the edge 3<a>, the weight is released and warning given, and on further movement of the disc 1 the trip lever enters the main slot of the notch and operates the main switch. The weight 7 is pivotally mounted at 9 on an arm 10 pivoted at 11, and a spur wheel 8 fixed to the weight 7 engages a fixed sector 12 so that the weight in falling swings the arm 10 about its pivot, the amplitude of the movement of the weight being increased. In swinging to and fro, the weight closes the contacts 5, 6 intermittently, and it comes to rest with the contacts open. The weight is reset by a pin 16 on the disc 18 of the prepayment mechanism engaging the end 15 of the arm 10.
Patent GB-1170474-A (GB)
Title: Method for the threadless binding of piles of sheets and apparatus for carrying out the method
IPC: B42C9/00
Filed: 1967-04-25
Abstract: 1,170,474. Bookbinding. PLANATOLWERK W. HESSELMANN, CHEMISCHE- und MASCHINENFABRIK FUR KLEBETECHNIK. 25 April, 1967 [26 April, 1966], No. 19071/67. Heading B6A. In a method for carrying out the threadlessbinding of piles of sheets or leaves which a solid meltable adhesive free from solvent is used and in which the solid adhesive is converted into the fluid adhesive state by the action of heat, the solid adhesive is in the form of a foil and is applied to the back or spine of the pile of sheets or leaves and subsequently heated. The apparatus shown comprises a manuallyoperated machine for the threadless binding of piles of sheets or leaves 1, of which the sheetedges 2 to be glued are to be contacted with a support 3 which is coated with a layer of meltable adhesive. The support 3, which is a slip-fold, is fed to the sheet-edges 2 by a spiked feed bar 4. The pile of sheets 1 is clamped in position by a bipartite clamp 6 provided at a distance from a jogging surface 8. The latter constitutes a part of a hot-plate 9 which consists of hot-plate sections 11 and 12. The plate is heated by elements disposed in a table top 20. The support 3 is moved into the gap between the pile of sheets 1 and the hot-plate 9 by lowering the hot-plate through rotation of an eccentric 16 and these operating the feed bar 4. The eccentric 16 is again rotated so raising the hot-plate 9 into contact with the support 3 prior to heating the plate with subsequent melting of the adhesive. The sections 11, 12 of the hot-plate are then moved apart after further rotation of the eccentric 16 which has allowed the hot-plate to be lowered once again. Renewed rotation of the eccentric 16 causes the trestle 14 on which the hot-plate is supported rise with the table 20 and the separated hot-plate sections such that the edge portions of the slip-fold 3 are wrapped around the lower edge of the clamped leaves 1 as is shown in Fig. 7. The eccentric may be rotated by mechanism also linked to the movable hot-plate section 12.