baber/WOPTO huggingface dataset:
Patent GB-1513915-A (GB)
Title: Polyurethanes having good hydrolytic stability and strength properties
IPC: C08G18/00
Filed: 1975-07-03
Abstract: 1513915 Polyurethanes ATLANTIC RICHFIELD CO 3 July 1975 [10 July 1974] 28065/75 Heading C3R A urethane polymer having good hydrolytic stability is prepared by reacting at least one polyisocyanate with a polyhydroxyl component which comprises (a) at least one polyol selected from polyester polyols and esters of hydroxylated fatty acids and polyhydric alcohols, and (b) 5-40% wt. based on the total weight of reactants of at least one polyhydroxyl polymer of a 1,3-diene hydrocarbon of 4-12 carbon atoms which is unsubstituted or 2- and/or 3-substituted, said polymer having 1À8 to 3À0 predominantly primary, terminal, allylic hydroxyl groups per molecule and a number average molecular weight of 400 to 25,000, the relative amounts of polyisocyanate and total polyhydroxyl compounds being such as to provide an NCO to OH group ratio of 0À85 to 2À0 : 1. The polyisocyanate may have 2-6 NCO groups per molecule and is preferably an aromatic diisocyanate. Suitable dienes are 1, 3-butadiene, isoprene, chloroprene, 2-cyano- 1,3 - butadiene and 2,3 - dimethyl - 1,3 - butadiene. The hydroxylated 1,3-diene polymers may have viscosities of from 5-20,000 poises at 30‹ C. and may be a homo-polymer or a copolymer, e.g. of butadiene and another vinyl monomer, e.g. styrene. The polyester polyols generally have molecular weights of 550 to 4000 and OH numbers of 12 to 1100 and may be linear or branched. Suitable polyesters are derived from aliphatic or aromatic polycarboxylic acids with aliphatic or aromatic polyhydric alcohols. Component (a) may also be a polylactone or a diglyceride of OH-containing castor oil, tall oil, soya oil or linseed oil, ethylene glycol- or propylene glycolmonoricinoleate or mono - 12 - hydroxy - stearate, pentaerythritol tetraricinoleate, or the triglyceride of ricinoleic acid. The polyurethane reaction may be carried out by the one-shot or prepolymer methods in the presence or absence of an inert solvent and optionally in the presence of a catalyst. Optional additives include fillers, extenders, plasticizers, antioxidants and colorants. In the examples polyurethanes are prepared by the one-shot technique from (1) a hydroxylated polybutadiene of M.Wt. 2700, (2) diphenylmethane 4,4<1> diisocyanate or toluene diisocyanate, (3) either (a) trimethylolpropane, 1,4-butane diol and 2- poly(diethylene glycol adipate) diols of different molecular weights, or (b) 1,4-butane diol, a polycaprolactone triol and 2 polycaprolactone diols of different molecular weights, and (4) di(phenylmercuric) dodecenyl succinate as catalyst. The polyurethanes are cured by heating.
Patent GB-603554-A (GB)
Title: Improvements relating to vibration dampers
IPC: F16F1/44
Filed: 1945-10-24
Abstract: 603,554. Resilient mountings. CAPON HEATON & CO., Ltd., and BOOT, A. Oct. 24, 1945, No. 28105. [Class 108 (iii)] A vibration damper comprises a hollow body part b having a hole in one end and within which is arranged a cylindrical block of rubber a so that an annular space surrounds the cushion and a stem g, h secured to one end of the cushion and passing through the hole and adapted to co-operate with the body part b to limit its range of movement relative to the part b. The stem g, h includes a head f which is bonded to the upper end of the cushion and an electric motor or other part to be supported is bolted to the threaded portion h so that it forms together with the head f means for limiting longitudinal deflection of the cushion by engagement with the portion of the part b surrounding the hole. The diameter of the part g is arranged in relation to the size of the hole to limit lateral deflection. The upper end portion of the part b may be formed by flanging the sides of the part b or by a separate disc c as shown. The lower end of the cushion may be bonded directly to the bottom of the part b or, as shown, may be bonded to a head d having a threaded stem e by which the vibration damper is secured in position.
Patent GB-724262-A (GB)
Title: Improvements in and relating to gear shaping machines
Inventor: MILLER EDWARD WHITNEY
IPC: B23F5/14
Filed: 1952-11-10
Abstract: 724,262. Gear-cutting. FELLOWS GEAR SHAPER CO. Nov. 10, 1952, No. 28240/52. Class 83 (3). A gear-shaping machine comprises a pair of cutter-carriers pivotally mounted on a support 23, the cutters C<SP>1</SP>, C<SP>2</SP> having cutting edges facing in opposite directions, and a reciprocating or oscillating displacer member 39 to move the carriers about their pivotal axes so that the cutters act alternately. The work 18 is reciprocated by hydraulic means 16 and rotated by a former 19 and linkage 20, 21, 22. The cutters are mounted on a slide 23 which reciprocates on a pedestal 24 mounted on a cradle 25 which is adjustable vertically by a screw 26 and angularly by a handle 27. The foregoing details are similar to those of the machine described in Specification 554,115. Twin single-tooth rack cutters C, C<SP>1</SP>, Fig. 2, are longitudinally adjustable on holders 29, 30 pivoted at 35, 36 to the slide 23 and carrying followers 40, 41 engaging a piston cam 39. The piston is operated to move the cutters to operative position determined by flanges 51, 52 on each side of the holders 29, 30. The cutters are returned by gravity, spring or cam means to a position determined by screws 45, 46. Gibs 49, 50 engaged by the flanges 51, 52 permit a limited transverse adjustment of the cutters. The slide 23 is reciprocated by fluid pressure supplied alternately to cylinders 56, 57, the pressure also serving to actuate the backing-off cam-piston 39. The slide may, however, be actuated mechanically. The single-tooth cutters may be replaced by rack-cutters. The single-tooth cutters may each be mounted on a holder 31a, Figs. 7 and 8, adjustable angularly about a longitudinal axis by screws 72, 73 and longitudinally by screws 34, 76. For cutting helical gears, the cradle 25 is set over and, if rack cutters are used, they are of the form shown in Fig. 10. In another modification, the work 103, Figs. 14 and 15, is carried on a laterally adjustable carriage 101 and is rotated by a motor which also rotates two pinion cutters C<SP>5</SP>, C<SP>6</SP> through worm gearing 125, 126 and replaceable splined connections such as described in Specification 435,702. The cutters are reciprocated by a motor 129 driving through an adjustable crank and connecting rod 133, 134 and segmental levers 135, 136 which are interconnected by an adjustable link 139. The levers 135, 136 and the cutter supports 95, 96 are pivoted to the main frame at 97, 98. The cutters are placed alternatively in operative position by a cam 142 on the shaft 130 carrying the crank 133. The cam engages followers on a lever 143, 144 which is rocked to depress studs 149, 152 engaging studs on the cutter supports 95, 96. The supports are returned by springs 155.
Patent GB-483100-A (GB)
Title: Improvements in or relating to electromagnetic devices having variable reluctance
IPC: H01H50/88
Filed: 1936-10-19
Abstract: 483,100. Electromagnetic relays. WEST & CO., Ltd., A.. and BUNYAN, J. Oct. 19, 1936, No. 28361. [Class 38 (v)] [Also in Group XXXV] An electromagnetic timing device comprises a field magnet and an armature the time taken for the armature to respond under given conditions being varied by varying the reluctance of the magnetic circuit of the field magnet. In the relay shown, the winding 1 is mounted on the centre limb of an E-shaped core 2. The control limb is of circular cross-section and is divided into two portions 4a, 4b in a plane at right-angles to its axis near one of its extremities. The adjacent surfaces of the two portions carry semicircular inserts 5a, 5b of non-magnetic material, and the outer portion 4b is mounted on a rod 6 which passes through a central bore in the other portion and carries a knob 7 and pointer 8 co-operating with a dial 9. The two portions are held together by a spring washer 10 between the knob 7 and the frame, and a thin non-magnetic washer 11 is provided between the portions to prevent them from sticking together. The reluctance of the magnetic circuit can be varied by rotating the knob 7. The winding 1 may constitute the timing winding. of the electromagnetic switch described in Specification 480,455.
Patent GB-1005717-A (GB)
Title: Improvements relating to buckles
Inventor: HEFFORD CHARLES GEORGE
IPC: A44B11/25
Filed: 1961-08-04
Abstract: 1,005,717. Buckles. STADIUM Ltd. Aug. 3, 1962 [Aug. 4, 1961], No. 28417/61. Heading E2A. A buckle for connecting straps 24, 26 comprises an apertured plate 1 having side flanges 4, 6, and a tongue portion 22, a handle 20 being pivoted to the side flanges bearing against pivoted pawls 12, 14 which are spring-biased to lie within the apertures of the base plate. In use, when the tongue 22 is inserted between the pawls and the base plate, spring 16 causes the pawls automatically to engage in apertures 40, 42 of the tongue 22 to prevent its withdrawal. Upon lifting the handle 20 the pawls 14, 16 rotate in a clockwise direction out of engagement with the tongue and the base plate to release the tongue. The spring 16 is attached to a central hook 32 of the base plate. Specification 1,005,718 is referred to.
Patent GB-693885-A (GB)
Title: Improvements in or relating to the armatures of rotary electric machines
Inventor: JR ROBERT HICKMAN RILEY
IPC: H02K13/04
Filed: 1951-12-05
Abstract: 693,885. Dynamo-electric machines. BLACK & DECKER MANUFACTURING CO. Dec. 5, 1951, No. 28524/51. Class 35. The connections between the winding wires 3 and the commutator segments 10 of a rotary armature comprise insulated tubular conductors 8 composed of spirally wound conductors 15 and lying partly in the winding slots 5. The ends of the winding wires which are preferably twisted as at 7 are secured as by soldering inside the spirals 15 which may be of round or (as shown) of rectangular copper strip.
Patent GB-244438-A (GB)
Title: Improvements relating to mechanical rectifiers for alternating current
IPC: H02M1/20
Filed: 1925-11-13
Abstract: 244,438. Siemens - Schuckertwerke Ges. Dec. 12, 1924, [Convention date]. Drawings to Specification. Commutator switching-arrangements.-To prevent sparking between the moving contacts of mechanical rectifiers, make-and-break is so regulated either by adjusting the times of contact or by introducing ohmic or capacitative resistance into the consuming circuit that the voltage difference between the moving contacts is, at those times, substantially nil.
Patent GB-599957-A (GB)
Title: Improvements in or relating to an installation for the continuous manufacture of glass
IPC: C03B5/225
Filed: 1945-10-30
Abstract: 599,957. Glass-melting furnaces. GLACERIES DE LA SAMBRE. Oct. 30, 1945, No. 28766. Convention date, Dec. 6, 1944. [Class 51 (ii)] [Also in Group XXIII] In the continuous manufacture of glass, the metal from the smelting furnace, before reaching the working chamber, passes through a heated refining pan and a series of cooling compartments, whose atmospheres are separate from that of the refining pan and whose length is such that only a small temperature difference occurs between the inlet and outlet of each, whereby convection currents therein remain weak. Two cooling compartments 8, 9 are shown, interposed between the refining pan 4 and the working zore 7, a heat insulating jacket 17 being provided for the compartments 8, 9 and a similar jacket 18 for the working zone 7. A rolling mill is shown at 16. The glass, leaving the furnace 2 by an opening 3 below the region disturbed by the fusion of the batch, passes in a thin layer over a barrier 6 where it is heated by a gas burner 5, by an electric heater, or by a current of hot gases; a further burner 19 may be provided in the arch at the opposite end of the refining pan. The glass leaves the bottom of the refining pan by an opening 10 and passes over a barrier 11 at the inlet end of the compartment 8, the communications between compartments 8 and 9, and 9 and 7 being similarly arranged. The barriers 6, 11 &c. may serve as stills or weirs, depending on whether the immediately following glass level is higher or lower than the top of each barrier. Parallel sets of cooling compartments may be arranged to feed several working zones from a single refining pan.
Patent GB-142409-A (GB)
Title: A portable folding oven for outdoor and general use
IPC: F24B1/20
Filed: 1919-11-20
Abstract: 142,409. Neale, E. C. St. J. B. Nov. 20, 1919. Cooking-stoves; ovens.-A folding oven for outdoor and other use consists of a flanged back plate a and, hinged to it, top and bottom plates c, b ; the bottom plate b has hinged to it two sides d, e and a door f, and the top c has flanged sides slotted to receive turn-buttons by means of which it is secured to the sides d, c. Guides g for the shelf h are fitted on the top c and bottom b as well as on the sides d, c, so that the oven may be used on its side.
Patent GB-463241-A (GB)
Title: Improvements in and relating to thermionic tubes
IPC: H01J19/42
Filed: 1936-10-23
Abstract: 463,241. Thermionic valves. ROGERS RADIO TUBES, Ltd. Oct. 23, 1936, No. 28893. Convention date, May 20. [Class 39 (i)] In a valve with a tubular cathode 3 and ceramic spacers 8, 9 for the electrodes, the cathode is held only by the upper spacer, by expanding by means of a two-part mandrel, the tube to form an oval end which has four line contacts at 20, 21 with a circular aperture in the spacer. At its lower end the cathode is supported by a rod 10 welded to a stiff lead 11. The anode and grid support rods 4, 7, 5, 6 are cemented into the spacers and have enlargements 18, 22 to position the spacers. The cathode construction may be used with multi-grid valves.
Patent GB-266055-A (GB)
Title: Improvements in electrical wave filters
IPC: H04B3/14
Filed: 1925-11-17
Abstract: 266,055. Standard Telephones & Cables, Ltd., (Bell Telephone Laboratories, Inc.). Nov. 17,1925. Filter circuits; thermionic heterodyne receivers.-Relates to electrical band filter circuits of the kind described in Specification 142,115 but adapted, like the mechanical and electromechanical wave filters described in Specification 243,321, to connect unequal end impedances without giving rise to reflections, and comprising sections having each a series impedance together with two unequal shunt impedances. In a filter (such as that shown in Fig. 3) of which all the sections are alike, oscillations are reflected on reaching each end unless the end impedances Z1, Z2 are equal and have a certain specified value. Where, however, Z2 = Q<2> Z1, Q<2> being any real number, reflection can be avoided by introducing at such .a point A, A' a perfect transformer having a step-up ratio Q provided that all impedances to the right of A, A<1> be also increased in the ratio Q<2>. According to the invention, the transformer and one adjacent series impedance such as T, Zo, Fig. 1, are replaced by an equivalent mesh such as that shown in Fig. 2, where Za=QZo/(Q-1), Zb = Q<2>Zo/(1-Q), and Zc =-QZo; but since either Za or Zb will be negative, according as Q> or <1, the negative impedance which arises must be realized by deducting an equal quantity from an already existing impedance occupying the same position in the chain. Thus if the filter shown in Fig. 3 be first designed for equal end impedances, and if then the impedance Z2 be increased so that Z2-Q<2> Z1, reflection will be avoided (the frequency characteristic remaining unchanged) if the impedances of L3, C3 be also increased in the ratio Q<2> and if the impedance of C, (corresponding to Zo) be replaced by an impedance Q times as great (corresponding to Zc) a capacity whose impedance corresponds to Za being added to C2 and one whose impedance corresponds to Zb being subtracted from the transformed value (C3/Q<2>) of C3. The Specification describes how to modify other types of filter in a similar manner. For instance, the symmetrical or uniform filter shown in Fig. 8 as adapted for equal end impedances Z1, Z2' may be adapted for unequal end impedances by taking the impedance of either L18 or C18 as the impedance Z0, Fig. 1. In the former case the inductance L18 is Fig. 6, replaced by inductances L16' L46, together with a substraction from the inductance L26, the magnitudes of the remaining impedances indicated being modified as described above. The transformation produced is stepdown from left to right, the reverse being the case if the impedance of the condenser C18 be taken as Zo. The Specification also describes the use of a filter of three sections, designed as described with reference to Fig. 3, for coupling the output of one amplifier (used for amplifying the supersonic beat frequency, together with its side bands, in a super-heterodyne receiver) with the input of the beat amplifier, the final capacity C3, Fig. 3, being the grid capacity of the second valve.
Patent GB-739138-A (GB)
Title: An improved bobbin support
IPC: D01H1/18
Filed: 1953-10-22
Abstract: 739,138. Bobbin supporting device. STAUFERT, H. P. Oct. 22, 1953 [Oct. 31, 1952], No. 29141/53. Class 120(2) A bobbin support comprises a flexible coupling member adapted to detachably receive a bobbin or bobbin tube and connected or adapted to be connected to a part or stud carried by a creel of a textile machine, the lower portion of the coupling member being adapted to be bent or flexed relatively to its upper portion and relatively to the part or stud on the creel. As shown in Fig. 1 a bearing stud or bolt 2 is connected to a creel 1 and rotatably and tiltably supports by a ball bearing ring 8 a stud 4 which carries the coupling member 3. The member 3 consists of elastic flexible material, e.g. rubber, and is formed with discs or flanges 9, 91, 9<SP>11</SP> the dimensions and shapes of which are such that a bobbin or tube slipped onto the coupling member 3 from below will be .held fast by surface friction. In the embodiment shown in Fig. 2 the coupling stud 12 is supported in a cap 14 countersunk into the creel 1. The flexible coupling member may have any number of discs or flanges 9, and the peripheral surfaces arranged to lie on a conical surface. The coupling stud may be relatively short, Fig. 8 (not shown), so that the coupling member is more flexible.
Patent GB-464825-A (GB)
Title: Improvements in or relating to high frequency electric feeder systems
IPC: H01P5/04
Filed: 1935-10-22
Abstract: 464,825. Loading. CORK, E. C., and PAWSEY, J. L. Oct. 22, 1935, Nos. 29152 /35 and 14719 /36. [Class 40 (iv)] [Also in Groups XL and XXXVI] Variation of the input impedance, within the operating frequency band, of a feeder caused by localized impedance, or the input impedance of an aerial due to weather changes of the insulators, is neutralized by suitable placing of other localized impedances. The Figure shows a concentric feeder terminated by an aerial represented as ZO its characteristic impedance. The effect of the insulator 12 in causing the input impedance to vary widely with a small change in frequency is overcome by placing a similar insulator 13 a quarter of a wavelength away. Alternatively the capacity of the line may be reduced by increasing the ratio of the radii of the outer and inner conductors, which also causes an increase in the inductance of the line at the point, or an integral number of half wavelengths away. The principle may be applied to cases such as bends in feeders where extra supporting insulators are used, and to expansion joints which are made one quarter or half wavelength long according to whether the characteristic impedance of the section is the same as the feeder, or not. In the case of an aerial or an open line feeding an aerial, changes due to weather affecting insulators are neutralized by providing similar insulators one quarter of a wavelength apart which are affected in the same manner. Specification 429,146, [Group XL], is referred to.
Patent GB-776642-A (GB)
Title: Improvements in portable staging for ships, buildings and other structures
IPC: B63C5/02
Filed: 1952-11-20
Abstract: 776,642. Scaffolding cradles. NEWTON, W .M. Feb. 19, 1954 [Nov. 20, 1952], No. 29294/52. Class 20(2) A staging for a scaffold comprises a platform 10 secured to the lower cross bars of end frames 12 connected to the platform by braces 13 and to each other by a wire 14, the frames having plates to which are secured winches 16 adapted to wind up the staging on wires which pass over blocks 20 suspended from a ship's bulwark or a building and back to hooks 18 on the end frames. The frames 12 have rollers adapted to run along a ship's side when the staging is moved horizontally on rollers 24 supporting the blocks 20. The blocks may be hooked on a ship's bulwarks.
Patent GB-1098057-A (GB)
Title: Improvements in or relating to circuit arrangements for measuring the amplitudes of a pulse
IPC: H03M1/00
Filed: 1965-09-15
Abstract: 1,098,057. Analogue-to-digital converters. PHILIPS' ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. Sept. 15, 1965 [Sept. 15, 1964], No. 39391/65. Heading G4H. In a circuit arrangement for measuring the amplitude of a pulse, of the kind having a series of triggers each of which, when set, supplies a signal of a given value to an adder, the output of which is compared with the input, the comparator causing a trigger to be reset if it causes the pulse amplitude to be exceeded, the triggers are connected as a counting chain so that after a first balance has been achieved the value in the counter may be reduced by one and a second comparison made. If the balance voltage is now less than the input pulse the first value is taken as correct. If it is still greater the counter value is reduced again and the second value taken if the third value gives too small a balance voltage. The values of the standard voltages given by the triggers are binarily weighted, except for the last which is the same as the next-to-last. The system measures the strengths of pulses given by a detector when it receives a radiation particle. A pulse value is retained by a pulse stretcher circuit and digitized as described. There are five triggers, giving 32 possible levels, there being a recorder, e.g. a counter, for each level. A signal is entered in the recorder of the appropriate level at the end of each quantization step, so as to obtain a statistical analysis of the strength of the radiation source.
Patent GB-1104365-A (GB)
Title: Improvements in or relating to electrical switches
IPC: H04M1/23
Filed: 1965-07-12
Abstract: 1,104,365. Switch incorporating a semiconductor device. SIEMENS A.G. 12 July, 1965 [13 July, 1964], No. 29402/65. Heading H1K. A contactless electric switch comprises a semi-conductor device upon which a force is exerted by a force store and which store is engaged by an actuating member which changes the force on the device and thus the electrical property of the device. The switching device may be a piezo-resistor or a planar transistor. A piezo-resistor 4, Fig. 1, is held in tension by a spring 5 acting on plate 6 and end member 3 of the piezo-resistor. Depression of the button 1 removes the tension on the piezo-resistor 4 but the movement is limited by stop 7. A planartransistor 8, Fig. 5, is acted upon by probe 21 mounted in leaf-spring 19. When the button is depressed against spring 17 the sloping portion 22 produces a specific force on the transistor. Other embodiments using tripping springs and leaf-springs are described.
Patent GB-1057824-A (GB)
Title: Improvements in or relating to the production of l-glutamic acid
IPC: C12P13/14
Filed: 1963-07-25
Abstract: L-Glutamic acid is prepared by fermenting an L-glutamic acid-producing bacteria in a culture medium containing (a) biotin in an amount in excess of the amount required for the maximum growth of said bacterium, (b) at least one surface active agent chosen from ester-ether-type non-ionic, ester-type non-ionic, ether-type non-ionic, polyoxyethylene alkylamine-type cationic or betaine-type ampholytic surface active agents, and (c) a carbohydrate source, and adding at least one antibiotic substance to the medium at least 8 hours after the initiation of the fermentation.  Specified bacteria are Microbacterium ammoniaphilum, Microbacterium flavum (var. glutamicum), Micrococcus glutamicus, Brevibacterium divaricatum and Corynebacterium nov. sp.