baber/WOPTO huggingface dataset:
Patent GB-705497-A (GB)
Title: Improvements relating to binary electric pulse coding systems
IPC: H03M1/00
Filed: 1949-12-30
Abstract: 705,497. Electric selective signalling. FERRANTI, Ltd.; and POLLARD, B. W. March 29, 1951 [Dec. 30, 1949], No. 33296/49. Class 40 (1). For expressing a number m as an N-digit binary group of ON-OFF electric pulses, a sequence of N pulses is fed, one pulse to each of N channels to serve as a control pulse for a gating means which allows a current of value 2 (N-n) I to flow through a resistance R common to all the channels, n being the number of the channel and I a fixed reference current. An output code pulse is produced in response to a control pulse when the voltage developed across R is equal to or less than mV where V=IR and the gate control voltage is caused to persist by charging a storage means until the termination of the pulse sequence. In the embodiment described, the voltage to be coded is applied to the comparator 20 from terminal 21 where it is compared with a voltage built up across a common resistance 17 by currents flowing from the sources 14 of the digit channel circuits such as 12 for channel n. These are operated in succession by pulses from conductor 19 connected to distributer 11 fed from the free-running multivibrator 10. The pulse is applied over conductor 18 to open gate 13 which passes a current 2 (N-n) I, where I is a fixed reference current, through the common resistance 17. If the comparator 20 yields a positive difference voltage on conductor 25, a gate 24 is opened to pass a pulse, derived from generator 10 and delayed in generator 23, to the flip-flop 22 which generates a pulse in the output conductor 27. This output pulse is also fed over conductor 28 to an auxiliary gate 30 which is fed also with the pulse in conductor 19, the coincidence of these pulses causing a pulse to charge a storage device 32. The gate 13 is thereby rendered conducting until the completion of the coding operation. If the output of comparator 20 is negative, gate 24 remains closed, no output pulse is fed to conductors 27 and 28 and gate 13 remains closed for the remainder of the coding operation. The circuit 12 for the last digit channel N contains only the components 13, 14, 15, 18 as no current maintaining circuit is required. The last pulse N from distributer 11 is fed over conductors 33, 34 to all the storage devices 32 to reset the coder for the next coding operation. The distributer 11 may be of the type described in Specification 705,477, [Group XL (c)], the gate circuit 13 may be of the type described in Specification 699,585, [Group XL (c)], and the means whereby the gate circuit 13 causes the correct current to flow in resistance 17 may use the principles described in Specification 682,156, [Group XL (c)]. A detailed circuit for components 13 and 17 is described, Fig. 3 (not shown).
Patent GB-384786-A (GB)
Title: Improvements in and relating to tennis practice devices
IPC: A63B61/00
Filed: 1931-12-01
Abstract: 384,786. Games practice - device. BENNETT, W. A., 67, Warwick Gardens, Kensington, London. Dec. 1, 1931, No. 33303. [Class 132 (ii).] A device for practising service strokes at tennis comprises uprights 11 and guy ropes 17 supporting a sheet of netting or other suitable material 10 immediately above a portion of netting 13 of regulation height to form ball catching pockets 14, 15, 16, 20. The height of the upper edges of pocket 16 and net 13 may be varied by means of pegs 18 and 12 respectively. The pocket 16 is also divided laterally by partitions 19, a correctly served ball falling into the centre compartment. The device preferably includes a strip of material to form a temporary or permanent base line and a ball receptacle. When space is limited the two halves of the base line may be arranged bisecting each other at a suitable angle and the net apparatus arranged parallel to one of the other parts of the base line. The net 13 may be dispensed with, the net 10 and appropriate supports therefor being adapted to be fixed above a regulation tennis set.
Patent GB-300032-A (GB)
Title: Improvements in or relating to tools for detaching or withdrawing wheels, pulleys and the like from their axles
IPC: B25B27/073
Filed: 1927-12-09
Abstract: 300,032. Hepworth, E. Dec. 9, 1927. Addition to 269,334. Removing wheels from shafts. - The wheel puller as described in the parent Specification is provided with dogs 6 which are screwed up on the spindles 7 and secured by lock nuts 8. Fig. 10 shows a modified dog secured on the spindle by upper and lower lock nuts 8, the recess 11 either engaging a security bolt on the wheel or engaging the head 12 of a segmental plate 13 passed behind the wheel, Fig. 8, or behind the security bolts. Another form of segmental plate 13, Fig. 9, has two slots 16 to fit under the nuts on two security bolts, the recess 10 then being engaged by a dog 6 as shown in Fig. 1.
Patent GB-864880-A (GB)
Title: Process for the production of 1:2-dichlorobutane-3:4-epoxide
Inventor: HAWKINS EDWIN GEORGE EDWARD
IPC: C08G59/04
Filed: 1957-10-25
Abstract: Epoxy resins are formed when suitable halogenated epoxy compounds are reacted with polyhydric compounds such as 4 : 41-dihydroxydiphenyldimethyl methane, 4 : 41-dihydroxydiphenyldimethyl propane and novalak resins. The preparation of mixed and individual isomers of 1 : 2-dichlorobutane-3 : 4-epoxide is described (see Group IV(b) ) but no detailed examples of the preparation of epoxy resins are given.  Specification 784,620 is referred to.ALSO:The invention comprises the high boiling isomer and the low boiling isomer of 1:2-dichloro-butane-3:4-epoxide. 1:2-dichlorobutane-3: 4-epoxide is produced by treating 1:2:4-trichlorobutanol-3 having an infra-red spectrum showing the presence of hindered and associated hydroxyl groups with an alkali to produce a mixture of the two isomers of 1:2-dichloro-butane-3:4 epoxide and some 1:4- dichlorobutane-2:3-epoxides, separating the bulk of the isomeric 1:2-dichlorobutane-3:4-epoxides from the 1:4-dichlorobutane-2:3-epoxides, treating the latter with hydrogen chloride to produce 1:2:4-trichlorobutanol-3 and recycling this to the alkali treatment step.  The isomers of 1:2-dichlorobutane-3:4-epoxide can be separated by fractional distillation.  A mixture of isomers of 1:2:4-trichlorbutanol is prepared by reaction of 1:2-dichlorobutene-3 or 1:4-dichlorobutene-2 with hypochlorous acid, e.g. chlorine in aqueous alkali.  The preferred alkali used to treat the trichlorobutanol is sodium hydroxide.  Diluents such as water and/or C1 to C6 aliphatic alcohols may be present. The single isomers of 1:2-dichlorobutane-3:4-epoxide react with hydrogen chloride to give single isomers of 1:2:4-trichlorobutanol.  Similarly the single isomers of 1:2:4-trichlorobutanol when treated with alkali result in single isomers of 1:2-dichlorobutane-3:4-epoxide.  Specification 784,620 is referred to.
Patent GB-521379-A (GB)
Title: Improvements in or relating to mixing machines
IPC: B01F7/16
Filed: 1938-11-17
Abstract: 521,379. Machinery guards. WRIGHT, F. H., and LEWIS, E. W. Nov. 17, 1938, No. 33467. [Class 80 (iv)] Mixing machines of the vertical paddle type are provided with a fixed guard 21, Fig. 1, extending downwards from the driving-head 12 to the rim of the bowl 20 when this is in operative position, the driving means being put out of action when the bowl-carrying means is lowered or the bowl is removed. The bowl is supported on a. carrying-device 18, which slides on the vertical pillar 10 of the machine under the control of a lever 19. The circuit of the driving-motor 13 contains a safety switch 24 comprising spring contacts 26, 27, Fig. 2, which are closed by the stem 32 of a spring plunger 31 when the slide 18 is raised with the bowl upon it. When the bowl is placed on the slide, a projection 34 advances the plunger 31, so that the stem 32 strikes an insulating-block 29 and closes the contacts 26, 27 when the slide rises. If the bowl is absent, the plunger 31 is not advanced, and the motor cannot be started. Alternatively, the raising of the bowl-carrier may actuate a driving-clutch.
Patent GB-300587-A (GB)
Title: Improvements in measuring tapes, or rules
IPC: G01B3/10
Filed: 1928-11-15
Abstract: 300,587. Farrand, H. A. Nov. 15, 1927, [Convention date]. Measuring-tapes. - Relates to thin spring steel tapes of concavo-convex cross section and consists in providing a coil holder which will allow only the desired length of the tape permitted to uncoil to assume the substantially straight rod-like condition due to the inherent tendency of this kind of tape, the remainder remaining coiled. In the form shown in Figs. 1, 4, one end portion 2 of the tape is formed flat with a hook 3 at the end which is adapted to enter an opening 4 to form a circular holder 5. On each edge of the portion 2 a series of projections or teeth 6 are formed perpendicular to the flat portion. The holder 5 is grasped lightly in one hand and the tape 2 is fed into holder with the other hand, the holder rotating and the coil being prevented from unwinding by engagement of the edge of the tape with the teeth 6. In a modification, Fig. 6, the holder is formed separately from a cylinder 11 having a bottom 10 and the top open with a narrow in turned flange 12 on which the teeth are formed. In a further form, Fig. 8, the bottom 10 of this casing 11 is rotatably mounted on a frame 15 comprising a strip bent to form a bottom piece 16, sides 21 bent over top flanges, the frame being held in the hand. In the form shown in Figs. 11, 12, the tape 1 is coiled concave side uppermost on a cylindrical holder 11<b> with an outwardly bent flange 25 provided with a further flange 12b on which the teeth 6b are formed. This holder is rotatably mounted in a frame formed from two strips 15<b>, 16<b> riveted together at right angles and having bent over flanges 21<b>. The holder is closed by a disc 29 riveted to the flange 25 and is rotated by a handle 32 mounted on an enlarged part of the rivet 26. In a further form the holder is made from a cylinder open top and bottom and having inturned flanges with teeth on each open face. Another modification comprises the last described form mounted in a cylindrical casing merely bent over at the edges to retain the holder. In a final form the holder is cylindrical with an internal flange and the teeth are provided on the edge of the tape.
Patent GB-1536117-A (GB)
Title: Guillotines
IPC: B26D7/22
Filed: 1977-08-10
Abstract: 1536117 Cutting apparatus ROYAL SOVEREIGN GROUP Ltd 10 Aug 1977 33579/77 Heading B4B A guillotine comprises a base, a fixed blade 12 mounted on one edge of the base, a movable blade 13 pivotally connected to the base and a guard plate 18 attached to the base, a member 21 being provided on the opposite side of the plate for movement with the blade 13 and arranged to press the guard plate into contact with the movable blade over substantially the whole of its pivoting arc and along the whole of its length. The member 21 is fitted with pads (22), e.g. of nylon, Fig. 3 (not shown), adapted to press against the guard and thereby force it into contact with the blade; the pads may be replaced by bolts, rollers or balls.
Patent GB-1495797-A (GB)
Title: Electromechanical pumping device for use with a perfusion apparatus
IPC: F04B43/12
Filed: 1975-08-13
Abstract: 1495797 Peristaltic pumps VIAL SARL 13 Aug 1975 [24 Sept 1974] 33801/75 Addition to 1445472 Heading F1F The main invention is improved or modified in that a platen 8 against which the perfusion tube 4 is compressed by the rollers 3 has "ramps" CA, BD next the ends of a compression area AB so as to obtain a more uniform flow-rate. The profiles of the said area and ramps may be arcs of circles centred at 0, 0', 0". Grooves or slots 9 may be formed in the platen to render it resilient to minimize crushing of the constituents of the working fluid, which may be blood.
Patent GB-802045-A (GB)
Title: Rectifier equipment
IPC: H02M7/06
Filed: 1955-11-25
Abstract: 802,045. Rectifying. STANDARD TELEPHONES & CABLES, Ltd. Nov. 25, 1955 [Nov. 27, 1954], No. 33813/55. Class 38 (2). A D.C. load is normally supplied from a single phase supply through rectifiers G<SP>1</SP>1, G<SP>1</SP>2 connected to receive on the input side threephase current from the Scott connected secondary windings of transformers T1, T2, the primary windings of which are connected in series, and one of which, T2, has a saturable core and a capacitor C in parallel with its primary winding. This arrangement has a substantially level voltage characteristic over its working range. To use the arrangement for supplying higher current, e.g. for rapid loading of storage batteries at the expense of a falling characteristic, ganged switches S1 S2, S3 are moved from the dotted to the solid line position. The primary windings are then connected substantially in parallel and the rectifiers are arranged as a single-phase bridge. The heating of transformer T2 may be reduced by connecting to primary winding in parallel with part only of the primary winding of transformer T1.
Patent GB-1093303-A (GB)
Title: Method of making a filter for cigarettes
IPC: A24D3/06
Filed: 1965-08-06
Abstract: A method of making a cigarette filter material comprises the steps of washing shreds of tobacco leaves and stalks with water, bleaching the shreds, impregnating them with an aqueous solution of aluminium sulphate, so that they take up 0.001-1.0% of their dry weight of aluminium sulphate calculated as aluminium, and impregnating the wet mass with an aqueous solution of sodium silicate.  The tobacco mass is then washed and dried to produce a filter material.  Quantitative examples are given.
Patent GB-826993-A (GB)
Title: Improvements relating to methods of applying antiseptic appliances for telephones and speaking apparatus
IPC: H04R1/12
Filed: 1956-11-06
Abstract: 826,993. Sanitary and hygienic devices. ISTED, A. E. Feb. 6, 1958 [Nov. 6, 1956], No. 33900/56. Class 40 (4). A loop into which the user may insert one or more fingers is attached to one lid of a disinfecting device of the type described in Specification 322,933. The loop may be attached to the inside of the lid so that it can be enclosed within the device when closed, or it may be permanently constructed on the outside of the lid.
Patent GB-1522077-A (GB)
Title: Signal generator
IPC: G04G3/00
Filed: 1976-08-16
Abstract: In order to manufacture a time-base signal generator, a quartz crystal having dimensions included within predetermined tolerances is formed, this quartz crystal is connected to an oscillating circuit and to a frequency divider, these circuits being constructed such that the division ratio is adjustable. According to the invention, the crystal is of the GT-cut type and the polishing is carried out in such a way that the ratio between the width (w) and the length (l) has precisely the value which corresponds to a zero frequency/temperature coefficient. The width and the length may have values which depart from the nominal values provided that they remain within the tolerances ( DELTA w) and ( DELTA l). Under these conditions, the generator of the time-base signal entirely forgoes any temperature-compensation element. <IMAGE>
Patent GB-605169-A (GB)
Title: Improvements in and relating to agricultural implements
IPC: A01B3/58
Filed: 1945-12-17
Abstract: 605,169. Agricultural implements, HARRISON, C. H. Dec. 17, 1945, No. 34113. [Class 6(i)] In an agricultural implement coupled to a light tractor, the connection between the tractor steering- handles and the implement is effected by a tool-suspension frame carried by the implement and adapted to be fastened to said handle by a pair of quickrelease couplings. As shown, the coupling device comprises a sliding bolt 25, mounted on each of the steering handles, by means of which a crossbar 14 of a tool-suspension frame 11, 12, 13, 14 may be retained in sockets 1, 1a. A plough beam 8 carries a tubular socket 16 adjustably clamped on a post 15 mounted on the lower element 12 of the tool-suspension frame. The vertical member 11 of said frame is adjustably connected to the member 14 so that the shape of the frame may be altered thus tilting the plough beam transversely. The front of the plough beam is provided with a link 7 which is connected to a slotted drawbar 6. In modifications the front connection of the plough beam may be replaced by a sliding-bolt fastener or by a hook at the end of link 7 engaging a hole in the drawbar. Screw means 30 operated by a handle 31 provides for adjusting the depth of working.
Patent GB-482158-A (GB)
Title: Method of and means for applying closures to vessels
IPC: B21D51/32
Filed: 1936-12-14
Abstract: 482,158. Closures for pails and cans. McNEIL, R., and YOUNG & CO., Ltd., R. Dec. 14, 1936, No. 34242. [Class 125 (ii)] A closure or lid B is applied to a pail D, can or the like, by means of a roller P at the end of the lever M which can rotate on a bolt J at the end of the arm F. This arm is supported above a distance piece or collar on a pin E which rises from a base A seated in recess in the lid B. The bolt J passes through a slot G in the arm F and is held in a suitable position by a locking piece K having undulations which engage similar shapes on the arm. The outer end N of the lever M serves as a handle to force the roller P to turn down the edge of the lid to form a seal. The lower edge S of the roller P may be corrugated. Where the pail has lugs R at the top, the flange of the lid may be removed or modified to fit round the lugs.
Patent GB-342800-A (GB)
Abstract: 342,800. Totalizators. HEYNE, W. O. of Plessey Co., Vicarage Lane, Ilford, PACKMAN, P. J., 129, Pembroke Road, Seven Kings, both in Essex, and BRITISH ELECTRIC PARI-MUTUEL, Ltd., 85, High Holborn, London. Nov. 13, 1929, No. 34727. [Class 106 (i).] The totals are displayed without insignificant zeros appearing and this is effected by the use of lamps, one for each digit space, the lamps being operative only when required, that is, as the total builds up. In the form shown in Figs. 1 and 2, the digits are stencilled in drums 16 surrounding lamps 11 projecting through lenses 15 on to a screen 10. The drums are each driven by a clutch and hunter-gear from a shaft 22 under the control of the respective counting device as in Specification 325,111, [Class 40 (i), Electric signalling systems &c.]. In order to bring the lamps into action seriatim they are arranged in parallel and each lamp circuit includes a spring-controlled contact-arm 33, Fig. 3, tending to close, but normally prevented by a detent 35. As each stencil drum-operating circuit receives its first impulse a relay 29 in that circuit is energized to rock the detent and release the contact-arm. If the first impulse received is in a higher denomination all the detents of the lower denominations are also operated by a connecting wire 36. In a modification, Fig. 4, each lamp circuit is controlled by one or more contacts 45 pertaining to higher denominations and adapted to be opened when the relative drum stands at zero. Thus, the units lamp 11 is put in circuit at 43 as soon as the units drum moves off zero. It may also be illuminated when any of the higher drums move owing to the provision of the further contacts 45. Specifications 287,767, 324,907, and 334,270, [all in Class 106 (i), Calculating &c.], also are referred to.
Patent GB-905626-A (GB)
Title: Improvements in or relating to a method of testing inert gases
Inventor: RIDOUT EDMUND UMFR EVILLE
IPC: H01J17/20
Filed: 1958-10-27
Abstract: 905,626. Determining qualities of materials. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. Oct. 22, 1959 [Oct. 27, 1958], No. 34396/58. Class 37. In a method of testing quantitatively for the presence of an adulterant gas in an inert gas, the mixture is passed into a glow discharge tube 1 having electrodes 2 set to form a gap of constant width to which an alternating voltage is applied from a constant potential source so as to maintain a glow discharge. The percentage of adulterant is determined by measuring the current through the gas, to which it is related (Fig. 1, not shown). The constant voltage, is derived from a saturated core constant voltage transformer 8 shunted by capacitor 9, via a step-up transformer 6. The current is measured by an ammeter 10 inductively coupled to the primary circuit 7, whose circuit includes terminals 11 connected to an alarm system, e.g. a flashing light or a bell.
Patent GB-1190056-A (GB)
Title: Book File
Inventor: PURSER WILLIAM FRANK
IPC: B42F11/02
Filed: 1967-07-27
Abstract: 1,190,056. Book file. W. F. PURSER. 27 July, 1967, No. 34617/67. Heading B6E. A book file comprises a rigid spine 3, 4, Fig. 1, and at least one associated stiff strip such as a wire or rod 9 carried or each carried by at least one end of the spine and extending along the spine for insertion between the leaves of an inserted book to hold it firmly to the spine. The two parts of the spine are connected together by screw means 10. In a modified file the rods 9 extend the length of the spine and are provided with finger grips 13, Fig. 3. In a further embodiment the rods 9 of Fig. 3 are constructed as headed pins passing through and located in the ribs 11 at both ends of the spine. Locking means may be provided at the rib 11 associated with the heads of the pins to prevent their displacement.
Patent GB-1261385-A (GB)
Title: Speech analyzing apparatus
IPC: G10L15/065
Filed: 1969-07-09
Abstract: 1,261,385. Speech recognition. MATSUSHITA ELECTRIC INDUSTRIAL CO. Ltd. 9 July, 1969 [24 July, 1968; 27 May, 1969], No. 34692/69. Heading G4R. Speech analysing apparatus generates a signal having a frequency depending on the difference in frequency between an input voice and a standard voice signal, and uses the generated signal to normalize the frequency of the input voice, the normalized input voice signal being split into frequency bands to give amplitude signals which are compared to locate formants the locations of which are stored in their order of occurrence. The speaker speaks the five vowels in turn, the speech waveform in each case being fed via a low-pass filter and integrator to a Schmitt trigger circuit, pulses from which are gated to a counter to determine the pitch, the count being converted to an analogue voltage which is subtracted (in a differential amplifier) from a standard voltage for the vowel, the result being converted to digital form and stored in a memory. Logic circuitry obtains the average of the five results thus stored which is converted to analogue form and used to control the frequency of an oscillator the output of which is used to shift the frequency of the input speech waveform to be recognized, after the latter has been low-pass filtered. This shifting compensates for different speakers. The resulting normalized speech is split into frequency bands. Adjacent bands are compared (in differential amplifiers), after rectification and integration, the amplifier outputs feeding NAND logic via thresholders detecting positive and negative levels respectively, to locate the formants. The formant locations are entered into columns of a core matrix addressed in turn by a driver circuit started by detection of the onset of speech. Different columns may be addressed for different lengths of time. The matrix may also receive voiced and unvoiced indications obtained by integrating high and low frequency bands of the normalized speech separately, comparing the (two) integrator outputs in a differential amplifier and thresholding the amplifier output to detect positive ("voiced") and negative ("unvoiced") outputs.