baber/WOPTO huggingface dataset:
Patent GB-1513044-A (GB)
Title: Stepping motor systems
IPC: H02P8/14
Filed: 1975-09-18
Abstract: 1513044 Electrical measurement of speed and position INTERNATIONAL BUSINESS MACHINES CORP 18 Sept 1975 [5 Oct 1974] 38299/75 Heading GIN [Also in Division H2] In an electric stepping motor system of the type including a pair of bifilar stator pole windings L 11, L12, the rotor velocity and position are determined as follows: signals representative of UX 1  (the voltage across a bifilar winding pair) and il I and i12 (the currents in the respective windings of the pair) are derived, analog means receive these derived signals and generate a signal UP 1  where: and a peak value rectifier 10 and a zero detection circuit 13 both receive the output of the analog means and generate outputs representative of the rotor velocity and the rotor position repectively. As shown bifilar windings L11, L12 are connected to a voltage supply Us via semi-conductor switches Al, A2 which are controlled to cause rotation of the rotor. The voltage UX1 across the windings is determined by a differential amplifier 1 and the sum of the currents il 1 and i12 is determined by a differential amplifier 2. The outputs of amplifiers 1, 2 are connected to the summing point f at the input of an operational amplifier 6 which provides an output representing UP1. The zero crossing detection circuit 13 provides a pulsetype output signal upon a zero crossing and another pulse-type output upon a subsequent zero crossing, the sequence of these signals indicating rotor position. In the case where the motor has two pairs of bifilar winding, the induced voltages have a phase difference such that the zero crossing of one occurs at the same time as the peak of the other. However, the condition where the motor is oscillating about its stop position may be distinguished by the fact that in this situation the induced voltages in both pairs cross the zero level at the same time at the extremes of the oscillation.
Patent GB-829974-A (GB)
Title: Improvements in and relating to recoil spring arrangements for fire arms
IPC: F41A25/10
Filed: 1957-12-10
Abstract: 829,974. Recoil apparatus for automatic guns. VERWALTUNGSGESSELLSCHAFT DER WERKZEUGMASCHINENFABRIK OERLIKON. Dec. 10, 1957 [Dec. 21, 1956], No. 38334/57. Class 92 Relates to automatic guns in which the gun support or casing 2 recoils with respect to a stationary gun mounting 13, e.g. fixed on an aircraft structure 17, against the action of recoil apparatus which controls recoil and run-out. The gun mounting 13 comprises a cylinder surrounding the casing 2 and having one flange 15 bolted to the structure 17 and abutment flanges 14, 14<SP>1</SP> for the recoil apparatus. This comprises two friction ring springs 12, 18 each having a steeper spring characteristic upon compression than upon expansion, the springs acting in opposite directions between the cylinder 13 and casing 2 so that as the recoil spring 12 is compressed during recoil, the buffer spring 18 expands and vice-versa during run-out. The arrangement is such that opposite spring forces are acting on the gun during both recoil and run-out in such a manner as to provide smooth braking and regular recoil movement. Specification 697,934 is referred to.
Patent GB-1467278-A (GB)
Title: Paving stone or paving block
IPC: E01C5/00
Filed: 1974-09-03
Abstract: 1467278 Paving blocks HUGO ROSENBERGER KG 3 Sept 1974 [31 Jan 1974 26 Feb 1974] 38451/74 Heading E1B A paving block of generally polygonal shape having each side edges wholly formed by a curvilinear concave portion a in line with and adjoining a rectilinear portion b in turn in the same line with and adjoining a curvilinear convex portion c. The rectilinear potion may be at an angle of 45‹ to the general line of the side edge. The block may be square, hexagonal or octagonal and the face of the block may be chamfered to the edge. Blocks may be formed as two of the square blocks together as an oblong block, or four together as a larger square block.
Patent GB-1133366-A (GB)
Title: Improvements in and relating to glandless pumps
IPC: F04D13/06
Filed: 1966-08-26
Abstract: 1,133,366. Centrifugal pumps. ALLWEILER A.G. Aug.26, 1966 [Aug. 31, 1965], No.38460/66. Heading F1C. [Also in Divisions F2 and H2] In order to increase wear resistance of bearings of a centrifugal pump for heating systems, the bearing parts 11, 12, 13 are all of a hard antifriction material, e.g. sintered alpha-aluminium oxide, having the same composition and the same hardness. Moreover, the, bearing parts 13 are each mounted via an annular element 15 which permits the bearing part 13 to have universal joint type displacement over a few degrees or  even minutes. The element 15 has line contact with the pump casing and/or the bearing part 13, and is sufficiently elastic to permit the universal joint type displacement without permitting purely radial displacement.
Patent GB-1022614-A (GB)
Title: Improvements in and relating to band clamps
IPC: F16L33/12
Filed: 1962-10-11
Abstract: 1,022,614. Band clamps. W. HENNING. Oct. 11, 1962 [Oct. 11, 1961; Aug. 30, 1962], No. 38513/62. Heading E2B. A band clamp comprises a worm adapted to engage corresponding part threads in a free end portion of a strap, the worm being mounted on a support member having elongated projections at the sides arranged obliquely and adapted to engage guiding surfaces of lateral walls of a bracket adapted to receive the other end portion of the strap. With this construction when the worm is rotated to tighten the strap around an article the worm is pressed into the part threads of the strap. In the construction shown in Figs. 2 and 3 the guiding surfaces are the upper edges. of inclined slots 52 in the side walls 53 of the bracket 54. The worm support member is a cap 45 having two of the projections 49, 50 on each side which engage the slots the worm 40 being rotatably mounted in end walls of the cap. The strap is attached to the bracket by having one end portion bent round a part of the bracket base. In a modification the projections engage underneath inclined flanges projecting inwardly from the walls of the bracket. In a further construction the cap is provided with an inclined hook shaped projection on each side and these projections engage out turned flanges on the bracket walls. In another construction, Fig. 8 the support member 101 extends over the worm 98 which is attached to its front plate 95 by a rivet 99. The plate 95 carries a pin 93 which engages slots 92 in the walls of the bracket 84. The other end of the support member is provided with inclined flanges 102 which engage open ended slots 103 in the bracket walls. This construction enables the worm to be pivoted away from the strap for ease of engagement of the strap ends. In a modification of this construction the support member is the front plate only; the flanges are ommitted and instead a wire clip is engaged with the pin 93 and hooks over the top of the worm, the spring, near its base, engaging the slots 103.
Patent GB-1442757-A (GB)
Title: Optical matrix displays
IPC: F21K2/00
Filed: 1972-08-18
Abstract: 1442757 Luminescence PLESSEY CO Ltd 13 Aug 1973 [18 Aug 1972] 38570/72 Heading C4S [Also in Division G5] An optical apparatus for 3D display and data storage comprises fluorescent material body 7 (liquid or solid), laser 8 (e.g. mode-locked) producing light pulses, an optical arrangement for feeding the pulses to opposite faces of the material, deflectors 13, 14 for defining the pulse positions in two dimensions, and a variable folded optical delay line adjustable for defining in a third dimension a position within the material where pulses intersect and fluorescence occurs. Scanning may be by a rockable mirror or Kerr Cell deflector. Fig. 5 (not shown) includes laser assembly (17) comprising light source (18), variable folded optical delay line (19), mirrors (20), (21) and mode locking device (22) (e.g. a dye cell). The laser may radiate at one frequency for writing and at a different frequency for reading when the material exhibits luminous persistence, the stored information being sampled by an optical detector. To produce improved definition a pulse compressor may be used to provide sub pico second pulses. Fluorescence may be excited by visible radiation, or invisible (e.g. infra-red).
Patent GB-859221-A (GB)
Title: Improved method for preparing aromatic aminoazo compounds
IPC: C09B41/00
Filed: 1957-12-12
Abstract: Aromatic aminoazo compounds are prepared by diazotising a primary aromatic monoamine unsubstituted in the para-position with a nitrite in an acid medium at a temperature of 0-50 DEG  C., the molar ratio, of amine to nitrite being at least 2,5, and heating immediately after diazotisation the aromatic diazoamino compound to a temperature not greater than 75 DEG  C. in the acidic medium, with or without a Friedel-Crafts catalyst, the molar equivalents of acid used being in the range of 1,4-2,5 based on the nitrite when no Friedel-Crafts catalyst is ued and in the range of 1,03-1,3 when a Friedel-Crafts catalyst is present.  Specified acids are phosphoric, sulphuric, nitric hydrochloric and hydrobromic.  Specified catalysts are aluminium, antimony and ferric halides, boron trifluoride and trifluoromethylbenzene.  In examples p-amino-azobenzene and p-amino-azotoluidine are prepared from aniline and o-toluidine.
Patent GB-1459606-A (GB)
Title: Phthalazone compounds
IPC: C07D491/048
Filed: 1974-09-04
Abstract: 1459606 4-Hydroxymethylphthalazones M INOUE M ISHIKAWA T TSUCHIYA and T SHIMAMOTO 4 Sept 1974 [30 Oct 1973 31 Oct 1973] 38708/74 Heading C2C The invention comprises compounds of Formula I in which R 1  and R 2  are independently C 1-3  alkyl and R 3  is C 1-5  alkyl or R 2  and R 3  together form a methylene, ethylidene or propylidene group which may be prepared by (a) reacting a compound of Formula II wherein R 1 , R 2  and R 3  are as defined above and Z is alkoxy, halogen, O.CO.O.CH 3  or with an alkali metal borohydride in the presence or absence of a metal halide or (b) reacting a compound of Formula III with hydrazine. The methyl and ethyl esters of 6-carboxy-5,7- dimethyl - 3 - hydroxy - 3 - methylphthalide are prepared by heating the methyl and ethyl esters of 5-carboxy-4,6-dimethylbenzene-1,2-dicarboxylic acid anhydride with malonic acid and pyridine and are reacted with hydrazine to obtain 6,8 - dimethyl - 7 - methoxycarbonyl (or ethoxycarbonyl) - 1 - phthalazone - 4 - carboxylic acid which are in turn esterified by heating with ethanol and concentrated sulphuric acid to obtain the corresponding diesters. 3,5 - Dimethyl - 4,6 - diethoxycarbonylbenzoic acid is refluxed with thionyl chloride to obtain 3,5 - dimethyl - 4,6 - diethoxycarbonylbenzoylchloride which is further reacted with diazomethane to obtain 3,5-dimethyl-4,6-diethoxycarbonyl-w-diazoacetophenone which is cyclized by heating with sulphuric acid in dioxane to obtain 6,8 - dimethyl - 7 - ethoxycarbonyl isochroman-1,4-dione. 8 - Bromomethyl - 4,7 - diethoxycarbonyl - 6- methyl - 1 - phthalazone, obtained by reaction of 6,8 - dimethyl - 4,7 - diethoxycarbonyl - 1 - phthalazone with N-bromosuccinimide and benzoyl peroxide, is heated under vacuum to obtain a compound of the Formula IV 6,8 - Dimethyl - 7 - ethoxycarbonyl - 4 - hydroxymethyl - 1 - phthalazone is refluxed with trifluoroacetic acid to obtain 6,8-dimethyl-7- carboxy - 4 - hydroxymethyl - 1 - phthalazone. Pharmaceutical compositions having activity in the treatment of hypertensive, atherosclerotic and thrombotic diseases and diseases due to misfunction of the cyclic AMP for oral or parenteral administration comprise a phthalazone derivative of Formula I and a pharmaceutically acceptable diluent or carrier.
Patent GB-1080785-A (GB)
Title: Improvements in "organopolysiloxane compositions"
Filed: 1964-09-23
Abstract: A liquid composition, stable in the absence of water but curable to an elastomer on exposure to moisture at ambient temperature, comprises by wt.: (1) 100 pts. of either (A) a siloxane composed of R2SiO units or (B) a copolymer of R2SiO (major constituent) and RSiO1.5 units, both (A) and (B) containing 0.02 to 2% (by wt.) of Si-bonded -OH radicals, having a viscosity at 25 DEG  C. of 300 to 500,000 cps., having a R/Si ratio from 1.85 to 2.0 and having a ratio of the sum of R and OH radicals to Si from 2.001 to 2.05, (ii) 2 to 30 pts. of a siloxane of R2SiO, RSiO1.5 and R3SiO0.5 units and having a viscosity at 25 DEG  C. of up to 200 cps., and (iii) 2 to 20 pts. of RSi(OCOR1)3, wherein each R is a monovalent hydrocarbon, halo-hydrocarbon or cyanoalkyl radical and R1 is H or a monovalent aliphatic radical.  Fillers, e.g. TiO2, Fe2O3, SiO2 (fume, aerogel and precipitated), diatomaceous earth, zirconium silicate, glass fibres, ground quartz and P.V.C., and curing accelerators, e.g. dibutyltin-dilaurate and carboxylates of Pb and Zn, may also be added.  In a typical Example (1) a hydroxyl - terminated dimethylpolysiloxane, SiO2 (fume), TiO2, a hydroxyl - terminated Me2SiO-MeSiO1.5 copolymer, MeSi(OAc)3 and dibutyltindilaurate, were mixed together under an anhydrous nitrogen atmosphere, to yield a composition which cured to an elastomer when exposed to moisture. Uses.-As sealants,caulking compounds and as binding materials.
Patent GB-1283139-A (GB)
Title: Automotive transmission
IPC: F16H61/02
Filed: 1970-08-12
Abstract: 1283139 Change-speed gear BORG-WARNER CORP 12 Aug 1970 [25 Aug 1969] 38879/70 Heading F2D Relates to an arrangement of the parts of an automatic transmission for front or rear drive or a motor-vehicle to reduce overall length. An intermeshed planet gear 18 of the usual type is driven through a torque-converter 13 and central input shaft 11, and drives a final output gear or chain sprocket 12 rotatable on the input shaft 11 between the torque-converter 13 and the gear 18, whilst two gear-input clutches 14, 15 are arranged behind the gear and in a common radial plane, one 15 inside the other 14. Two brakes 16, 17 are arranged radially outwards of the gear 18, one 16 being in a common radial plane with a one-way brake 42, reacting on the casing through a splined common back-plate 70 of the brakes 16, 17. A governor 110 is also arranged between the torque-converter and the gear and is driven by the final output ring gear 35. The two clutches 14, 15 provide selective input to suns 33, 31 respectively, 15 being engaged in all three forward ratios (direct and two reduced), and 14 in direct-drive and reverse. The planet carrier 41 is held by the one-way brake 42 for one-way low, or by the brake 16 for two-way low and reverse, the sun 33 being held by the brake 17 for second ratio. An engine-driven pump 101 supplies servo pressure for the clutches and brakes and for lubrication.
Patent GB-1070448-A (GB)
Title: Improvements in hydraulic drive systems for mineral mining machines
Inventor: ANDERSON FORREST SYMINGTON
IPC: E21C29/16
Filed: 1964-09-24
Abstract: 1,070,448. Hydraulic drive systems for winding. ANDERSON MAVOR Ltd. Dec. 28, 1965 [Sept. 24, 1964], No. 38892/64. Heading B8B. An hydraulic drive system for hauling a mineral mining machine 5 via a chain 4 and pulley 3 comprises a reversible hydraulic motor 1 driven by an hydraulic pump 6 through flow and return lines 9, 10, 11, 12, a changeover valve 8 in the said lines for controlling the direction or stopping of the motor 1 and a recirculation valve 21 in a recirculating line 20 between the flow and return lines 11, 12 adjacent the motor 1, the valve 21 being held closed by fluid in a line 27 except when the changeover valve 8 is selected for stopping the motor 1, The changeover valve 8 comprises a channelled rod 14 slidable in a cavity 15 of the valve block to connect the motor lines 11, 12 to either of the flow and return pump lines 9, 10 or connect line 9 to line 10 whereby the motor is no longer driven by the pump 6. When the motor is being driven the pressure in lines 9, 27 is such that valve member 28 of valve 21 is held closed blocking the recirculation line 20, but when the motor is not driven, the pressure in the flow line 11 or 12 becomes greater than that in the lines 9, 27 and valve 21 opens allowing circulation of fluid between lines 11 and 12. In the latter situation motor 1 is driven by residual stress in the haulage chain 4 until such stress is relieved, a restriction 31 in the recirculation line 20 damping the motion. An electric motor 7 drives the pump 6 and a priming pump 34 for replacing fluid which has leaked from the system. The priming pump 34 is connected to a fluid reservoir 35 and feeds the system through a non-return valve 36. In the embodiment of Fig. 1 (not shown) the return line 10 between pump and changeover valve includes the reservoir.
Patent GB-1428489-A (GB)
Title: Electrical resistor inks
IPC: C09D11/00
Filed: 1973-08-17
Abstract: 1428489 Coated aluminium UOP Inc 17 Aug 1973 [18 Aug 1972] 38947/73 Addition to 1377413 Heading C1A [Also in Division H1] A semi-conducting material having a carbonaceous surface layer is obtained in examples by treating γ-alumina with benzene at 700‹ C. or with butane at 650‹ C.
Patent GB-1006349-A (GB)
Title: Improvements in electrical printed-circuit windings for dynamo-electric machines
IPC: H02K3/26
Filed: 1961-10-31
Abstract: 1,006,349. Dynamo-electric machine windings. SOC. D'ELECTRONIQUE ET D'AUTOMATISME. Oct. 31, 1961 [Oct. 31, 1960], No. 38964/61. Heading H2A. In an electrical printed circuit winding for a dynamo-electric machine having a short air gap between conductive faces adjacent the winding, comprising flat conductors arranged in at least two sets of half-turns to cover at least parts of the winding except for narrow insulating gaps between the conductors, the latter are insulated by applying to themselves an insulating film which is a compound of the conductor material. The winding may be that of the armature 30 or field of a motor or generator, and the conductors be made of copper in which case the compound is cupric oxide produced by dipping in an oxidizing bath copper discs prior to etching the conductor patterns. The winding may be self-supporting and either the two sets are applied to a dielectric disc. 31, Fig. 3a, and then insulated on the outside, or each set is insulated on both sides and the two sets are secured together. Alternatively, the winding may be applied to a metal supporting disc, Fig. 5 (not shown), or the armature may comprise two electrically independent windings, Fig. 7 (not shown). Instead of the discoidal shape the winding may be either cylindrical or in the form of a belt. Specifications 874,394, 935,652, 949,376 and 949,390 are referred to.
Patent GB-1127442-A (GB)
Title: Improvements in or relating to devices for measuring alternating or fluctuating quantities
Inventor: NELSON JOHN CHRISTOPHER CUNLIF
IPC: H03M1/00
Filed: 1964-09-24
Abstract: 1,127,442. Digital measurement of R.M.S. values. NATIONAL RESEARCH DEVELOPMENT CORP. 23 Dec., 1965 [24 Sept., 1964], No. 39020/64. Heading G4H. An alternating or fluctuating signal is measured by a system in which the signal is amplified or attenuated in amplifier 11, so that when squared (15) and smoothed (16) it balances a D.C. reference voltage 19, the error signal of the comparator 18 serving, to control the amplifier 11 by regulating the flow of pulses to a reversible counter 22. The counter has three decades each comprising a ring of five stages and a bi-stable. The output signals from each stage are converted to a combination of signals on four leads and used to open diode switches to bring appropriately weighted resistors into circuit to adjust the gain factor of the amplifier 11. If the input to the amplifier is of opposite polarity another set of resistors and diode switches comes into operation, the control signals being inverted for this purpose. The error signal from the comparator 18 causes the counter 22 to count up or down according to its sign and it also governs the frequency of the pulses from generator 21 in accordance with its magnitude. The relationship between the magnitude of error signal and the frequency may be linear or logarithmic.
Patent GB-1517798-A (GB)
Title: Dual friction clutch for motion-picture projectors
IPC: F16D11/10
Filed: 1975-09-24
Abstract: 1517798 Motion picture projectors BENCINI SpA 24 Sept 1975 [25 Sept 1974] 39129/75 Heading G2E A double clutch arrangement for motion picture projectors has a drive spindle AL with a weak clutch mounted at one end and a strong clutch mounted at the other end, and a slider CU which can be moved parallel to the axis of the spindle to engage one clutch, or the other, or to disengage both. The spindle AL, which has mounted at one end a hub MO which carries the film spool, is housed within a hollow spindle AC, which is itself housed within a stationary double sleeve MM, PC. One end of the hollow spindle has a groove RR which engages with a toothed drive wheel RD. On each side of wheel RD are friction discs AF and FF, and outside these are washers HH and HI which are keyed into the groove RR. Fixed to spindle AL is a flange FL, and abutting against the flange via a friction washer RF is a crown-shaped presser disc SS. A thin steel cup spring DS is clamped peripherally to the flange FL, and its springiness urges it against disc SS, which is coupled to the hub MO. The slider CU is shown in Fig. 1 in its neutral position, when the drive wheel RD is uncoupled from both clutches. If the slider is moved one step to the left (position of Fig. 2, not shown), a tooth DT thereon engages in a groove CA in the hollow spindle AC, so that the slider is now driven by the spindle which is itself driven by wheel RD. At the same time two teeth NT at the left hand end of the slider engage in holes in flange FL, so that the flange, and hence also spindle AL, are rotated. Thus the drive is now transmitted, via cup spring DS and presser disc SS, to the hub MO. This is the "weak clutch" operation. If the slider is now moved a further step to the left (position of Fig. 3, which shows the "strong clutch" operation), the teeth NT move further through the holes in flange FL, and enter into complementary cavities in presser disc SS, so that the slider is positively coupled thereto. The slider is still coupled to the hollow spindle AC by the tooth DT. Thus the torque impressed on spindle AL will depend largely upon the friction generated by the friction discs AF and FF under the action of a spring ML, which is more powerful than cup spring DS. The whole arrangement may be duplicated so as to control two drive spindles, and the different clutching requirements can be applied to either spindle selectively by operation of a single control mechanism Fig. 5 (not shown).
Patent GB-1507335-A (GB)
Title: Fm demodulators
IPC: H03D3/04
Filed: 1975-09-25
Abstract: 1507335 Binary FSK demodulators; data transmission SOC ITALIANA TELECOMUNICAZIONI SIEMENS SpA 25 Sept 1975 39394/75 Headings H3A and H4P A binary FSK demodulator comprises an input filter F 1 , a squaring circuit SQ, a circuit QD responsive to each zero-crossing of the input signal applied via SQ to provide a first pulse at 1 to enable a memory MR to store the contents of a counter CN connected to count clock pulses from TR and a second pulse at 2 to subsequently reset the counter, the demodulated output being derived via a digital to analog converter DA and a threshold circuit CT. The output of converter DA consists of two distinct voltage levels from which the two keying frequencies are obtained at the output of the threshold device CT. Power supply variations are compensated by making the output of converter DA and the reference voltage V, applied to CT dependent on the supply. The counting period of counter CN may be made equal or less than half period of the input signal. The circuit QD may include as in Fig. 2 (not shown) a two stage shift register and other logic gates.