baber/WOPTO huggingface dataset:
Patent GB-1263832-A (GB)
Title: Improvements in or relating to signalling systems
Inventor: BROWN EARL FRANKLIN
IPC: H03M3/04
Filed: 1970-09-24
Abstract: 1,263,832. Pulse code modulation system. WESTERN ELECTRIC CO. Inc. 24 Sept., 1970 [26 Sept., 1969], No. 45468/70. Heading G4H. In an analogue to digital system in which the change in analogue signal is encoded in a threebit code, extra levels are obtained by dispensing with the sign bit for the highest and lowest levels, the levels being symmetrical about zero. The input signal is fed to a subtractor 102 where the previously coded sample is subtracted from the input. The difference signal is then fed via sampler 103 to threshold network 104. The output of network 104 is then fed to logic circuit 105 which combines the highest and lowest levels. Thus if a signal has a level corresponding to + 4 or - 4 it produces a pulse on line H. A 4 output is produced provided the previous output is of the same polarity, if it is of opposite polarity an output at the appropriate 3 level is produced. The positive outputs of logic circuit 105 are fed to logic circuit 108 which separates the highest and lowest levels and, these together with the remaining outputs are fed to digital to analogue converter 107. The output of 107 is fed via integrator 110 back to subtractor 102. The output of logic circuit 105 is also fed to code converter 106 and then transmitted. The logic circuit 105, Fig. 2, has a delay unit 203 which feeds the preceding output from the + 1 threshold, always present for positive signals, to AND gate 201 and inhibit terminal of AND gate 202. Thus if the preceding pulse is positive, gate 201 is enabled and gate 202 is inhibited. If the signal is negative, gate 202 is enabled and gate 201 is inhibited. Thus in the event of a +4 pulse being preceded by a negative pulse an output is obtained on the +3 line and vice versa. The logic circuit 108, Fig. 3, for separating the highest and lowest levels has a delay 302 through which the + 1 to +3 levels are fed to AND gate 303 and an inhibit terminal of AND 304. Thus if the previous pulse was positive AND gate 303 is enabled to produce an output representing +4 if a 4 pulse is present. Similarly a preceding negative pulse causes gate 304 to be enabled so that the 4 pulse appears at - 4. Code groups received by the receiver, Fig. 1 first pass through a code converter which produces an output on one of eight lines. These then pass to digital to analogue converter 123 via a logic circuit 122 of similar construction to logic circuit 108 used in the encoder. The output of the digital to analogue converter is then integrated to reconstruct the signal. A second embodiment produces two extra levels namely 5 and 4 by missing the zero level.
Patent GB-1484181-A (GB)
Title: Monitoring welds
IPC: G01N21/88
Filed: 1974-10-22
Abstract: 1484181 Testing welds photo-electrically FRANCE ARMED FORCES MINISTER OF 22 Oct 1974 [23 Oct 1973] 45729/74 Heading G1A The quality of a weld is tested by measuring the infrared radiation it emits immediately after it is formed. In Fig. 1 two flanges 3a, 3b are being welded to a plate 4 by passing a high electric current between wheels 2a, 2b. The wheels move along the flanges, producing a weld 5 a zone 6 of which is viewed by mirrors M1, M2. The infrared beams are directed by these mirrors to a chopper 10 and then alternately to detector 18. The detector and the optical elements are mounted to move with wheels 2a, 2b so as to always view a zone just behind the wheels. The sum of the two beams is found at 16 by storing and adding the detector signals corresponding to the beams, while the difference is found by storing and subtracting at 15. The sum and difference may be thresholded, displayed, or recorded to indicate weld quality. The sum indicates the presence of defects such as inclusions, while the difference is a measure of the correction of the weld position; the wheel path may be controlled by the difference measurement. The chopper may rotate rapidly, in which case the two detector signals which are summed or subtracted will represent two views of the same zone 6; however, if the chopper rotates slowly, one of the mirrors M1, M2 should be displaced along the line of the weld to ensure that the signals still represent views of the same zone. In another embodiment, Fig. 2 (not shown), the beams are received by separate detectors whose outputs are summed and subtracted.
Patent GB-922265-A (GB)
Title: System for reading binary magnetic recordings on a surface of magnetic material
IPC: H04R11/00
Filed: 1961-12-21
Abstract: 922,265. Transistor and valve pulse-circuits. HOLLANDSE SIGNAALAPPARATEN N. V. Dec. 21, 1961 [Jan. 9,1961],No. 45856/61, Class 40 (6). [Also in Group XIX] The effect of drift in a D.C. transistor amplifier for pulses from a magnetic read head which are directed to outputs 227, 222 for positive and negative pulses respectively is eliminated by the use of two followers 214, 215, each receiving the output of three cascaded transistor stages, and one of which 215 has a large time-constant input circuit 211, 212 so that its output is at the average level of the output of 214. Thus positive pulses at 220 pass via 224 to 227 only, and negative pulses via 221 to 222 only. These pulses are then used to set a trigger (not shown) to register the bits being read from a NRZ recording (see Group XIX). The effect of base currents in the transistor output stages is said to be compensated for by use of a NPN transistor 215 instead of PNP elsewhere, and by using a tapping 209 on the output potentiometer of the third of the cascaded stages for transistor 214. A Zener diode 206 in this stage compensates for the change in D.C. conditions due to direct coupling of the three stages. Negative feedback via 204 further compensates for D.C. drift. Fig. 3 (not shown), illustrates a generally similar arrangement using all PNP transistors. Fig. 1 shows a similar valve circuit with the associated trigger 127 referred to above; here, 107 represents the cascaded valve amplifiers, 105 an electronic switch for selecting one of the read heads 101, 103, and 126 an inverter to ensure that 127 receives negative pulses at each input.
Patent GB-1429918-A (GB)
Title: Catalyzed redistribution of hydrocarbyltin halides
IPC: B01J31/00
Filed: 1974-10-24
Abstract: 1429918 Preparing hydrocarbyltin trihalides CINCINNATI MILACRON CHEMICALS Inc 24 Oct 1974 [10 Jan 1974] 46043/74 Heading C2J Compounds of formula where R is hydrocarbyl and X is F, Cl, Br or I are prepared by reacting R 4 Sn, R 3 SnX or R 2 SnX 2  with SnX 4  in respective molar ratios of 1 : 3, 1 : 2 and 1 : 1 and in the presence of an onium salt catalyst, usually at 150-300‹ C. for 0À5-20 hours and desirably in the presence of RX. The catalyst may have a cation R<SP>1</SP> 4 Z where Z is N, P or As and R<SP>1</SP> is alkyl, aryl, alkaryl or aralkyl and an anion such as F-, Cl-, Br-, I-, sulphate, phosphate, nitrate, acetate or -SnX 3 <SP>-</SP>. The catalyst may be prepared in situ from an onium hydroxide or by addition of an amine or phosphate to the reaction mixture. In examples, (CH 3 ) 2 SnCl 2  and (C 4 H 9 ) 2 SnCl 2  are each reacted with SnCl 4  in the presence of (CH 3 ) 4 NCl to yield methyl- and butyl-tintrichloride respectively.
Patent GB-963507-A (GB)
Title: Improvements in or relating to epoxy resin compositions
IPC: C08G59/50
Filed: 1961-12-22
Abstract: A heat-curable composition comprises a guanamine and a polyepoxy component of formula: <FORM:0963507/C3/1> in which R is a tetravalent aliphatic hydrocarbon radical with 2 to 10 carbon atoms. Preferred guanamines are of formula: <FORM:0963507/C3/2> in which R1 is H, benzyl, phenyl or alkyl with up to 21 carbon atoms, or of formula: <FORM:0963507/C3/3> or of formula: <FORM:0963507/C3/4> in which R2 is alkyl with 6 to 22 carbon atoms, or of formula: <FORM:0963507/C3/5> in which R3 is the divalent hydrocarbon radical of a dimerized unsaturated fatty acid.  The compositions may include inert fillers, e.g. mica, pigments, glass fibre mat. They may be partially cured to a stable "B-stage" and curing completed at elevated temperature in a reasonable time without catalysts.  In the examples the epoxy resin employed was a mixture of isomers of the tetraglycidyl ether of 1,1,2,2-tetraphenyl ethane. Examples 1,4,5, 6 use cocoguanamine as curing agent with mica, glass roving, or glass flakes-mica mixture as filler. The compositions were part cured at 150 DEG C. to yield stable, friable thermosetting compositions. In Example 8 a similar mixture was cured at 190 DEG C. for 10 minutes with part-curing at 150 DEG C. for two hours, and in Example 9 a similar mixture was cured at 150 DEG C. for 1/2 hour. Example 2 uses a guanamine derived from the C8-C10 fraction of coconut oil acids; Example 3 uses 2-phenyl-4,6-diamino-1,3,5 -triazine as curing agent and Example 7 lauroguanamine.
Patent GB-1529836-A (GB)
Title: Process for biochemical optical resolution of alpha-tocopherol
IPC: C12R1/66
Filed: 1975-11-13
Abstract: 1529836 Tocopherol esters EISAI Co Ltd 13 Nov 1975 [13 Nov 1974] 46934/75 Heading C2V In a process for the optical resolution of a mixture of 2D- and 2L-α-tocopherol esters the esters are reacted with an enzyme which has the ability to hydrolyse selectively one of the isomers and then the unhydrolysed ester is separated from the hydrolysed α-tocopherol. In examples isomeric mixtures of α-tocopherol stearate, linoleate,caproate, succinate and monochloroacetate are selectively hydrolysed to one of the α-tocopherol isomers with enzymes derived from Candida cylindracea, Pseudomonas aeruginosa, Rhizopus oryzae and Aspergillus niger.
Patent GB-1036692-A (GB)
Title: Lubricants
Inventor: COUPLAND KEITH
IPC: C10M169/00
Filed: 1963-11-28
Abstract: The invention comprises a synthetic lubricant base containing at least one keto-ester of the formula <FORM:1036692/C4-C5/1> where R1, R2, R3, R4 and R5 ar are alkyl groups. Preferably R1, R2, R3 and R4 have at least 4 carbon atoms and R5 is methyl.  The lubricant base may also contain a compound having at least two ester groupings in the molecule, e.g. dioctyl sebacate, dinonyl sebacate, esters of trimethylol propane such as trimethylol propane tricaprylate, esters of pentaerythritol, alkyl esters of organic dicarboxylic acids and monocarboxylic acid esters of polyalcohols. The bases are useful in turbine engine lubricants.ALSO:Ketoesters suitable as lubricants (see Division C5) comprise compounds of the formulae <FORM:1036692/C2/1> the triesters of which are novel, wherein R1-R5 are alkyl groups. Preferably, R1-R4 contain at least four carbon atoms and R5 is methyl. The compounds are prepared by cyanoethylation of the appropriate alkyl cycloalkanone followed by hydrolysis of the resulting nitrile to give the acid which is then esterified with the appropriate alcohol in the presence of an entrainer and an esterification catalyst.  The entrainer may be benzene, toluene, cyclohexane or any other hydrocarbon which forms a binary azeotrope with water. The preferred catalyst is sulphuric acid.
Patent GB-1241293-A (GB)
Title: Improvements relating to article hoisting apparatus
Inventor: POSTHUMUS ROBERT
IPC: B66B9/00
Filed: 1967-10-16
Abstract: 1,241,293. Conveyers; platform elevators. R. POSTHUMUS. 16 Oct., 1968 [16 Oct., 1967], No. 47127/67. Headings B8A and B8H. [Also in Division C7] Article supports 16 are raised and lowered within a degreasing tank 5 by cables 30, 31 secured to a horizontally slidable block 27. The block is connected by a link 26 to an endless chain 22 driven by a motor 19 controlled by switches 36, actuated by the block 27, for stopping the motor as soon as the supports 16 reach their uppermost or lowermost positions. A timing device enables the supports 16 to be maintained at their lower positions for a preselectable time. The supports 16 have rollers 17a to facilitate transfer cf articles from one support to the other and are guided by vertical rails 11. Platform portions 17 may be folded upwardly. The supports may be contained in separate compartments of a degreasing tank and to avoid vapour drag-out when using a trichlorethylene bath the upward rate of travel is arranged to be 10 ft./minute. For full degreasing the articles are initially placed on the support which is in boiling liquid after which the articles are transferred to the support which is in the vapour compartment. The deposition of sludge on the articles is prevented by an agitation device which engages the cable 30 in the boiling liquid compartment. The drive for the article supports may be hydraulic or pneumatic. Thermostatic devices may control the supports on the basis of temperature variations. The embodiment shown in Fig. 4 provides for automatic feeding of the articles. Two conveyer portions 41, 42 reciprocate vertically in unison with two article cradles 16a, 16b and have uppermost and lowermost positions 41<SP>1</SP>, 41<SP>11</SP> and 42<SP>1</SP>, 42<SP>11</SP> respectively. For feeding the articles horizontally on the cradles and conveyers a feeder unit 50 comprises a reciprocable frame 54 having article-engaging members 51, 52, 53. The frame is reciprocated by an endless chain 56 driven by a motor 59. A single control unit provides for synchronous operation of the feeder 50 and the raising and lowering of the supports 16. A gate 45 normally checks articles fed from the conveyer 45 but, on conveyer portion 41 being moved to position 41<SP>11</SP>, the gate is moved downwardly and the article allowed to move on to the conveyer portion.
Patent GB-1423245-A (GB)
Title: Rolling mill
IPC: B21B25/00
Filed: 1973-10-16
Abstract: 1423245 Rolling tubes SUPERIOR TUBE CO 16 Oct 1973 [18 Oct 1972] 48195/73 Heading B3M A mandrel 170 for use in a tube cold rolling mill has a final portion 171 of non-circular section, which defines the internal shape of a finished tube, and a tapered intermediate portion connecting the final portion to an initial portion 173 of larger diameter. The final portion may be so shaped to produce any of the tube cross-sections of Fig. 11. The mandrel 170 has flats defining a hexagonal final cross-section, and has a circular initial section. The flats may be arranged in a helical shape, if desired. The mandrel can be used in a mill as described in Specification 1,305,769 in which a workpiece tube is fed axially along the mandrel while rolled by groups of rolls carried in a reciprocated housing. The mandrel is held axially stationary but may be rotatably indexed together with the tube, between reciprocating movements of the rolls.
Patent GB-1100871-A (GB)
Title: Pressure transducers
Inventor: LEDWIDGE THOMAS JOSEPH
IPC: G21C17/02
Filed: 1963-12-06
Abstract: 1,100,871. Measuring pressure electrically. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. Nov.23, 1964 [Dec. 6, 1963], No.48200/63. Heading G1N. Fluid-pressure applied to the outside of a stainless steel tubular member 2 compresses it and varies the capacitance between the member and a cylinder 1 supported coaxially inside the member 1 by an insulating block 10. The dielectric consists of a layer of flame-sprayed alumina, 3a, or other refractory material, on the cylinder, together with an annular air-gap between this layer and the member 2. The tubular member 2, with its integral end cap 4, forms a sealed cavity with a support 6 and flange 7 which is attached to a vessel containing the pressure to be measured. A second, reference, capacitor is formed by a cylinder 16 surrounded by a tubular member 17, and is enclosed by a sealing cup 24. The two capacitors are connected by means of connectors 12, 23, in an A. C. bridge circuit.
Patent GB-1389591-A (GB)
Title: Inflatable escape slideway apparatus
IPC: A62B1/20
Filed: 1972-10-19
Abstract: 1389591 Inflatable escape apparatus MITSUBISHI DENKI KK 19 Oct 1972 [19 Oct 1971 22 Feb 1972 31 May 1972 (2)] 48239/72 Headings B7A and B7J In an inflatable escape slideway apparatus of the type described and claimed in Specification 1,172,267, the lower portion of the helical balloon 16 has convolutions which gradually increase in diameter downwardly to permit contraction and expansion of the slide unit in response to changes in the distance between the float unit B and the upper end of the slide unit A. In the lower portion of the slide unit A the inner and outer collapsible tubular members 10, 12 may be assisted in collapsing in bellows formation by, e.g. elastic cords attached to their surfaces. In a modification, the lower parts of the inner and outer members 10, 12 may define between them a spiral space in which the helical balloon 16 is received. A double-helix arrangement may be used for greater escape capacity.
Patent GB-1456928-A (GB)
Title: Stepping motor
IPC: H02K7/065
Filed: 1974-11-07
Abstract: 1456928 Motor driving arrangements K GLASER 7 Nov 1974 48327/74 Heading H2A A rotary stepping motor has a shaft 13 mounted for rotation in a casing 11 and is driven by energizing an electromagnet 12 which attracts an armature 15 bringing spur teeth 20 thereon into engagement with spur teeth 44 on a rotatable ball race 17. The axial force on the ball race 17 is transmitted to balls 18 in the ball track 24, which has a sloping bottom (Fig. 5, not shown). The ball is thus forced sideways along the tracks in the race 17 and the fixed race 16. Thus the race 17 is rotated and since it is coupled to the armature 15 via the spur teeth 20, 44 this rotates too. The armature is coupled to a rotor 14 having pins 41 engaging in a radial slot in the armature 15 and which is rotationally fixed to the shaft 13 which is thus rotated with the race 17. The race 17 is mounted in a spring casing 26 which has three peripheral slots 25 carrying compression springs 21 (Fig. 2, not shown) and balls 22 which are engaged by pins 23 on the rotatable race 17, which as it rotates compresses the springs 21. On de-energization, the springs 21 restore the race 17 and balls 18 to their rest position. The rotor 14 has sprung balls 37 engaging in notches 36 in a catch ring 35 (Fig. 6, not shown) which thus retain the rotor and shaft in their new positions. The motor has a similar second half (the lower as shown in Fig. 1) which provides on energizing its electromagnet to rotate the shaft in the opposite direction.
Patent GB-1241508-A (GB)
Title: Support device for the detachable fastening of toy figures
IPC: A63H13/18
Filed: 1969-10-02
Abstract: 1,241,508. Easy release latch. MARGARETE STEIFF G.m.b.H. 2 Oct., 1969 [2 Oct., 1968], No. 48454/69. Heading E2A. A support device including a fastening arrangement for the detachable fastening of toy figures which are mounted on wheels and include two spaced rods 3, 4, the arrangement including first and second holders 1 and 2, with the first having an opening to receive one of the rods facing in a direction away from the second holder and the second having an opening to receive the other of the rods, a blocking detent 8 pivotally mounted on the second holder and spring means 16 associated with the blocking detent to bias the detent into the opening of the second holder, whereby upon engagement of the figure with the fastening arrangement one of the rods 3 of the toy figure is positioned in the first opening and the other rod 4 engages the blocking detent to pivot it out of the path of the second opening, whereupon the other rod is moved to the closed end of the second opening and the blocking detent is pivoted by the spring means into the second opening to latch the other rod in the second holder. The toy figure is removed by rotating the arm 12 in the direction 14 and reversing the above process. The slots 1, 2 may be U- shaped metal plates. The retaining lug axle 13 may be mounted on two moulded or bent-over lugs 20, the spiral spring 16 may be assembled on the axle 13 with one end of the spring bearing against the upper end of the retaining lug assembly 10 and the other end bearing on the outer face 18 of the U-slot so as to tend to rotate the retaining lug assembly in the direction 14. The lower end of the retaining-lug assembly 10 may be formed into a handle 12 pointing away from the slot 2.
Patent GB-1405350-A (GB)
Title: Phase-corrector
IPC: H03F1/32
Filed: 1973-10-17
Abstract: 1405350 Frequency modulated systems, phase correction THOMSON-CSF 17 Oct 1973 [20 Oct 1972] 48455/73 Headings H3R and H3U A phase corrector for a frequency modulated signal comprises two paths fed with quadrature signals, one path including a linear attenuator, e.g. diode 3, and the other path including a non- linear attenuator 6, 7, the outputs from the two channels being recombined in adder 10. Variation in the amplitude of the input signal will cause variations in the attenuation of the non - linear attenuator, resulting in variations in the phase of the recombined signal. The corrector may be cascaded with an amplitude corrector similar inform to the non-linear attenuator, Fig. 6 (not shown).
Patent GB-1357938-A (GB)
Title: Apparatus for separating liquid from a liquid/gas mixture
IPC: F22B37/32
Filed: 1971-10-19
Abstract: 1357938 Vortex separators SIEMENS AG 19 Oct 1971 [20 Oct 1970] 48641/71 Heading B2P Apparatus for removing liquid from a gas, e.g. entrained water from steam produced in a nuclear steam generator 1, 2, comprises first and second cylindrical vortex separation chambers 3, 11, which are connected end-to-end in a coaxial manner, and further vortex separation chambers 7, each positioned with its axis offset from the common axis of the chambers 3, 11, each of the chambers 3, 7, 11 being provided with inlet means 6, 9, 13 for admitting liquid/ gas mixture to the respective chamber in such a manner as to impart rotational flow thereto, a gas discharge outlet, e.g. as shown at 8, 14, from the upper region of each chamber, the outlet of the first chamber 3 being connected to the inlet means 13 of the second chamber 11, the inlet means 9 of each chamber 7 being arranged to receive liquid separated out towards the wall of the chamber 3, and the outlet 8 of each chamber 7 being connected to an additional inlet of the chamber 11 which is provided with means 15 for imparting rotational flow, in the same direction as that imparted on mixture admitted to the chamber 11 by its inlet means 13, on liquid/gas mixture delivered into the chamber 11 by way of its additional inlet. The inlet means to the chamber 3 consist of swirl vanes 6 annularly arranged around a flow member 5 having a vortex-stabilizing recess 20. The inlet means to the chamber 11 comprises an opening controlled by an adjustable diaphragm 24 and swirl vanes 13 around a flow member 12. Liquid separated out in chamber 11 enters via an annular gap 17 into a collecting chamber 18 and flows from there via conduits 19 into the lower zone of the vortex chambers 7. The latter are provided with swirl vanes 9 and dishshaped vortex-stabilizing members 21. Liquid flows from the chambers 7 into a collecting chamber 10. The auxiliary inlet to the chamber 11 is shown as comprising swirl vanes 15 but it may alternatively be located in the side wall of the chamber. In a modification, Fig. 2 (not shown), the further vortex chambers (7) are mounted with their upper inlets (9) in the upper region of the first separation chamber (3). The wall of each chamber (7) extends through a conical bottom wall of the chamber 3 into a liquid collecting chamber (28) into which an annular liquid discharge duct (18) from the chamber (11) also opens.