baber/WOPTO huggingface dataset:
Patent GB-1469035-A (GB)
Title: Voltage converting apparatus
IPC: H02M3/325
Filed: 1975-01-28
Abstract: 1469035 DC-DC converters NCR CORP 28 Jan 1975 [15 Feb 1974] 3593/75 Heading H2F  In a converter of the type in which the current in the two halves of a centre-tapped transformer 3 is alternately switched by means of switching devices such as transistors 4, 5, current sensing devices 17, 18 are connected in series with each switching transistor 4, 5 and the average values of said current are compared at 31 and arranged to correct the conducting period of only one of the two switching devices 4, 5. This arrangement thus prevents saturation of the transformer 3. As described, A.C. supply at 50 is rectified and filtered at 1 to provide 50 V D.C. which is alternately switched by means of transistors 4, 5 to the two halves of the centre-tapped primary of transformer 3. The output voltage is rectified at 6, 7 to provide 5 V D.C. across output terminals 10, 11. Triggering pulses for transistors 4, 5 are derived from a 40 kHz unijunction transistor oscillator 36 feeding a JK flip-flop 35 which reduces the frequency to 20 hHz and feeds anti-phase square waves into AND gates 13, 15 which are enabled by various circuits such as 16, responsive to over-temperature, input or output over-voltage. Automatic voltage regulation.-The D.C. output voltage is monitored at 22 and, in response to a sync. pulse from 36, feeds signals to monostable circuits 23, 24, of a duration which is a function of the desired output voltage. The AND gates 13, 15 are not enabled until the monostable multi-vibrators 23, 24 have timed out. Regulator 22 is coupled to circuits 23, 24 by means of optical isolators (not shown). Equalizing duration of conduction of output transistors 4, 5.-The instantaneous output currents are monitored at 17, 18 and integrated over several hundred cycles by means of a low-pass filters 32, 33 and fed to a differential amplifier 31 the output of which determines the resistance of transistor 30 and hence the timing period of the monostable multi-vibrator 24 and thus tends to equalize the duration of current of the output transistors 4, 5. Over-current protection.-The current signals across resistors 17, 18 also feed threshold devices 19, 20 which feed an OR gate 21 so that flip-flop 34 is disabled under over-current conditions, temporarily disabling the AND gates 13, 15.
Patent GB-1498313-A (GB)
Title: Door handles
IPC: E05B3/06
Filed: 1976-01-29
Abstract: 1498313 Door handles D DIECKMANN 29 Jan 1976 [14 Nov 1975] 03596/76 Heading A4U [Also in Divisions E1-2 and F2]  A door handle set comprises a door handle 2 having a portion 4 engaged by a spring 6 in the form of a plastics member mounted in a door plate 1 for resilient deformation by rotation of the handle. The spring may be of injection-moulded polyacetal resin and it has a flat 10 engaging a flat 5 on the portion 4. In operation the spring can be rotated through 90 degrees by rotation of the handle beyond its return limit position to a position in which the handle extends longitudinally of the door plate 1, for packing purposes, see Fig. 4 (not shown), or the spring can be similarly rotated through 180 degrees so that the handle projects to the opposite side of the door plate for oppositehand door operation. In a second embodiment, Figs. 5 to 8 (not shown), the flats 5 and 10 are replaced by a part of the spring having a portion engaged by a lock-operating square spindle (13), and a part (16) projecting upwardly from the body of the spring engages the sides of the door plate to limit rotational movement of the handle. To change the position of the door handle the spindle (13) is removed from engagement with the handle portion 4 until the handle 2 has been turned to the desired position.
Patent GB-602153-A (GB)
Title: Improvements in and relating to reinforced concrete constructions
IPC: E04C3/26
Filed: 1946-02-06
Abstract: 602,153. Reinforced concrete floor &c. beams. MACERATA. S. Feb. 6. 1946. No. 3765. Convention date Feb. 8, 1945. [Class 20(iv)] A reinforced concrete construction comprises one or more beams, slabs or like precast elements having a Hoyer-like prestressed reinforcement i.e. comprising a multiplicity of highly tensioned thin steel wires which are embedded in the concrete without hooks, plates or like anchors, in combination with a filling or other element having no pre-stressed reinforcement castin-situ upon and/or around and/or within the said pre-cast elements. In the form shown, a floor comprises pre-cast beams 1 having a Hoyer-like pre-stressed reinforcement 2 and conventional reinforcing rods 7 some of which project into reinforced concrete 4 cast-in-situ upon and around the beams. These beams may rest on transverse pre-cast U-girders (not shown) also having Hoyer-like reinforcing wires some of which may have their ends projecting into concrete cast-in-situ upon and within the girders. A method of joining two such girders, with their cast-in-situ filling, at right angles, is described. Reference has been directed by the Comptroller to Specification 578,814.
Patent GB-587517-A (GB)
Title: Improvements in or relating to radio navigation systems
IPC: G01S1/02
Filed: 1943-03-09
Abstract: 587,517. Radiolocation. BOWEN, E. G., and TOUCH, A. G. March 9, 1943, No. 3841.' [Class 40 (v)] In a radiolocating, direction - finding, or " homing " system indicating the direction and distance of a reflector or radiator of a pulsemodulated carrier, a time-base trace M2 on a cathode-ray screen is deflected in opposite directions by signals received on aerials having different directivities, the position of the deflection M3 relatively to a selected datum indicating the distance of the reflector or radiator. In radiolocation, the pulse transmitter 2 controls a saw-tooth generator 3 to produce a linear trace, which is deflected to right or left by signals from the directional aerials A1, A2 applied alternately by synchronized switches SI, S2 to the horizontal deflecting plates of the C.R.T. The first horizontal trace M near the beginning of the vertical time base is due to the pulse received directly from the transmitter ; the next trace M1 due to sea or ground reflections masks the first portion of the time base scale; small deflections M2 are due to random radiation ; and the first significant echo trace M3 is asymmetric indicating that the reflecting object is to the right. The course of the aircraft is altered until the trace M3 is accurately centred on the vertical time base, when the reflecting body is dead ahead. The time-base saw-tooth generator 3 may be arranged to give waveforms of different durations to provide. alternative indicating scales representing different ranges. The transmitting aerial may Consist of two horizontal quarter-wave sections placed one on each side of the hull or nose of the craft, the receiving aerials being mounted in front of the leading edge of each wing in such a way that the polar diagram of one lies to port and of the other to starboard. For searching at long range, an auxiliary transmitting aerial installation, comprising eight half-wave dipoles arranged horizontally in two tiers; may be mounted on top of the fuselage, the receiving aerials comprising two similar arrays mounted on the two sides of the craft, so that each is screened from the other by the hull. Time-base circuit, Fig. 2 (not shown). To give waveforms of different duration, three condensers of different capacity can be selectively connected to the anode of a valve, which is normally biassed to pass current. When a synchronizing pulse is applied (via-a resistance, a limiting device, and a condenser) to the grid of the valve, this becomes non-conducting, thus allowing the selected condenser to charge up through a resistance and generate the long flank of the saw-tooth waveform. At the end of the pulse, the charge on the grid condenser leaks away until the valve again becomes conducting and allows the time-base condenser to discharge. Specification 585,347 is referred to.
Patent GB-103040-A (GB)
Title: Improvements in Valves.
Inventor: SUNDERLAND WALLACE
IPC: F16K21/12
Filed: 1916-03-18
Abstract: 103,040. Sunderland, W. March 18, 1916. Valves closing after predetermined flow.-A waste-preventing valve, of the type actuated by fluid pressure acting on a diaphragm under the control of an auxiliary valve, comprises a diaphragm D clamped between the two parts A, A' of the casing. The lower part of the casing has a side inlet F provided with a valve seat E, a main outlet passage N, M, and an outlet passage P communicating with a passage 0 in the upper part of the casing, which carries a lift valve J adapted to be opened by depressing a push K against the action of a spring L to allow pressure which has leaked into the chamber I through a nipple G in the diaphragm to pass through the passage 0, P to the outlet M. Reference has been directed by the Comptroller to Specifications 12336/03 and 3503/08.
Patent GB-179302-A (GB)
Title: A process and machinery for making soldered chain mesh-work and chains
IPC: B21F31/00
Filed: 1921-02-03
Abstract: 179,302. Golby, F. W., (Bek, E. G.). Feb. 3, 1921. Making chains and metal fabrics ; coiling ; formers ; shearing-adjuncts. -In making chains or chain mesh, the wire is led to one end of a mandrel, bent thereon, moved to the other end thereof, slitted thereon, and the links removed therefrom and transferred to a device for intermeshing and locking them. The wire d is led through a spring- pressed tension block d<1>, is coiled on an intermitently-rotated mandrel a, severed by a saw or other cutter f while the mandrel is stationary, pushed by a collar c over the top end of the mandrel, which is tapered and thickened towards the joint side so as to distend the links and bring the ends into the same plane, and then transferred by a slide g to a chain or mesh h, which is mounted on a drum k. The mandrel is oval and is rotated step by step by a reciprocating toothed rack m, which meshes with a pinion b on a sleeve b<1> that is provided with a ratchet-wheel b<2> engaging a pawl b<3> on an arm a<5> secured to the mandrel. The wire is traversed on the mandrel by the collar c, the projecting edge of which is engaged by a spring arm c<1> having a wedge-piece c<3> which is struck by a wedgepiece c<2> on the rod e<2> reciprocated against the action of a spring e<5> by a cam e and lever e<1>. The cutter f, which co-operates with a notch or bevel on the mandrel, is mounted on a spindle which at one end is centred in a lever e<3> operated by the rod e<2>, and at the other end is centred in a bevel wheel which is driven by bevel gearing from the shaft t, through a countershaft, the bevel wheel and spindle having co-operating pins for rotating the spindle. The slide g, which is operated by a cam g<6> and spring-pressed lever g<4> has a rib g<8> which travels in a slot between two plates g', which are situated at a distance from the end of the mandrel equal to the thickness of the link, and thus keep the link on the surface of the table p. When making chain mesh, links are simultaneously made on two rows of mandrels, Fig. 11, the individual mandrels being alternately arranged so as to economize space and driven by a series of toothed rods m connected to a single frame. Two levers e<3> each provided with a set of saws f perform the severing operation, and a reciprocating frame carrying a series of slides g transfers the links to the mesh. The links may be distended after or during removal from the mandrel.
Patent GB-650567-A (GB)
Title: Improvements in or relating to plate and like apparatus for heat exchange, filteringand other purposes
IPC: B01D25/172
Filed: 1948-02-12
Abstract: 650,567. Plate heat-exchangers. CHERRYBURRELL CORPORATION. Feb. 12, 1948, No. 4128. Convention date, Feb. 24, 1947. [Class 64(iii)] [Also in Group I] In a heat-exchanger or other apparatus in which plate-like elements 15 are held in contact or close together upon a pair of supporting members, e.g. rods 12, 13, forming part of a frame provided with means for increasing the space available to the elements on the supporting members, the plate-like elements 15 are engaged with the supporting members 12, 13 with clearance and an additional supporting member, e.g. a rod 14, spaced from the members 12, 13 can be removably passed through aligned apertures 23 in the plate-like elements 15. Each plate is provided with open slots 20, 21 into which are received the rods 12, 13, and with diagonally-opposed apertures 22, 23 which are spaced laterally from the slots 20, 21. The rod 14, which extends through the apertures 23, is detachably secured to the frame member 10, the apertures 22 being used only when the plates are reversed. When it is desired to inspect an individual plate, the compression is first released by means of handwheels (not shown) threaded on to the rods 12, 13, and the individual plates are separated. The plate to be inspected is pivoted until the slot 20 is disengaged from the supporting rod 12, Fig. 3, and is then swung outwardly for inspection, as shown in Fig. 4, with the auxiliary support rod 14 acting as a pivot. If a plate is to be removed from the assembly, the auxiliary support rod 14 is detached from the frame member 10 and withdrawn from the plate or plates to be detached.
Patent GB-1104574-A (GB)
Title: New sealing process
IPC: B32B27/00
Filed: 1966-01-31
Abstract: 1,104,574. Laminates. ESSO STANDARD SOC. ANON. FRANCAISE. 27 July, 1965 [1 March, 1965], No. 32013/65. Heading B5N. A laminating process comprises applying as an adhesive to a substrate a pasty emulsion of a hydrated hydrophilic earth, a petroleum resin and an elastomer, said emulsion containing ambient temperature operable curing agents, drying the coating and applying thereto an organic solvent and an elastomeric material in sheet form. The sheet of elastomer may be reinforced with a loose woven fibreglass cloth and it may be provided on its outer surface with a sheet of reflecting material, e.g. an embossed aluminium sheet. Specified elastomeric sheet materials are natural rubber, butyl and halogenated butyl rubber, polychloroprene, ethylene/propylene copolymers, copolymers of mono olefins with norbonene, dicyclopentadiene or 5-methylene norbonene, polyisobutylene and polyethylene. The specified hydrophilic earth is clay. The exemplified elastomer for use in the emulsion is butyl rubber. Exemplified solvents are naphthas, white spirit, gas oil and mixtures thereof. A primer, e.g. a solution or emulsion of bitumen, tar or a petroleum resin may be applied to the substrate prior to the emulsion.
Patent GB-905200-A (GB)
Title: Improvements in indicating instruments
Inventor: MAJENDIE ALASTAIR MICHAEL ADAI
IPC: G01P1/08
Filed: 1960-02-08
Abstract: 905,200. Indicating-apparatus. SMITH & SONS (ENGLAND) Ltd., S. Jan. 25, 1961 [Feb. 8, 1960], No. 4316/60. Class 106 (4). Indicating-apparatus comprises a scale 5 extending angularly about an axis 2 through more than 360 degrees, the angularly-overlapping parts being displaced from one another both radially and axially, and a pointer 1 rotatably and axially displaced relative to the scale in dependence upon the magnitude of a variable quantity in such manner that the outer part of the pointer lies over the outer part 8 of the scale 5 when the magnitude of the quantity is appropriate to this part of the scale but lies behind the outer part of the scale when the pointer 1 is required to register with the inner part 11 of the scale. As shown in Fig. 4, the pointer 1 is driven by an electric servomotor 20, Fig. 4, and the pointer shaft 24 carries a screw-threaded portion 25 whose pitch is the same as the pitch of the helix formed by the scale strip 5. The scale 5 is secured to a bush 26 which is internally screwthreaded to co-operate with the portion 25. As shown in Fig. 1, the inner edge of the strip 5 is stepped, alternatively the inner edge may be an elongated spiral.
Patent GB-769237-A (GB)
Title: Improvements in or relating to siloxane resin foams
IPC: C08J9/06
Filed: 1955-02-15
Abstract: A siloxane resin foam of uniform density is made by heating a powder comprising a mixture of siloxane resin, a blowing agent which decomposes above the melting point of the siloxane and a setting catalyst at a temperature above the decomposition temperature of the blowing agent until the foamed resin is cured, the siloxane resin having the average general formula <FORM:0769237/IV(a)/1> where each R is a methyl, ethyl, vinyl or phenyl radical and n has an average value of from 1 to 1.5 inclusive.  In a modification the blowing agent and catalyst are replaced by di-nitroso-penta-methylene-tetraamine.  Other blowing agents specified are sodium bicarbonate and sulphonyl hydrazides, e.g. p.p1-oxy-bis-benzene-sulphonyl-hydrazide, and other catalysts specified are iron, zinc and cobalt naphthenates, trimethyl-beta-hydroxyethyl ammonium butoxide, benzyl-trimethyl ammonium naphthenate and trimethyl-betahydroxyethyl ammonium 2 - ethylhexoate.  Fillers, e.g. diatomaceous earth, crushed quartz, alumina, titania and fired expanded clay, may be added.  Examples are given.  The products are useful as low density reinforcing cores in sandwich construction, as insulation in fire walls and as a buoyant float in life rafts and life-saving equipment. Specification 717,807 is referred to.
Patent GB-590838-A (GB)
Title: Improvements in or relating to the preservation of rubber
IPC: C08K5/00
Filed: 1945-02-23
Abstract: The deterioration of rubber is inhibited by a process which comprises incorporating in the rubber a small proportion of a secondary aromatic amine antioxidant and a small proportion of phthalocyanine, or phthalocyanine substituted with alkyl, aryl or arylalkyl groups or a metal complex of phthalocyanine in which the metal is copper, silver, tin, cobalt, nickel, magnesium, zinc or aluminium.  The preferred antioxidant consists of one or more of the following amines:-p-, p1-, dimethoxydiphenylamine, N : N1 dipheryl-p-phenylenediamine, N-phenyl-b -naphthylamine, diphenylamine, N-phenyl-a -naphthylamine, N- : N1- diphenylbenzidine, the alkoxydiphenylamines, the alkenoxydiphenylamines, the alkoxy-phenyl-naphthylamines and the alkinoxyphenylnaphthylamines. The amount of phthalocyanine compound may vary from 0.00001 to 1.0 per cent of the rubber, and the antioxidant from 0.25 to 2.0 per cent of the rubber. Preferably 0.0001 to 0.01 part of the phthalocyanine compound is used to each part of antioxidant.
Patent GB-178618-A (GB)
Title: Splash guard for vehicle wheels
IPC: B60B7/00
Filed: 1921-03-05
Abstract: 178,618. Robbens, G. March 5, 1921. Mud-guards rotating with wheels.-An annular strip A, preferably of rubber, is mounted in a metal channel ring B which is secured to the wheel by helical springs F. In a modification, the connection consists of bolts D' with spherical nuts E<l> and a rubber buffer F<1>. The rubber strip is bevelled on its outer face.
Patent GB-251379-A (GB)
Title: Improvements in or relating to central heating
IPC: F24D9/02
Filed: 1925-02-20
Abstract: 251,379. Moreau, H. Feb. 20, 1925. Heat and temperature coefficients, apparatus for determining. - In a system for heating buildings by water circulation the water after circulation in each section of the building is reheated by steam and the quantity of steam condensed is measured to indicate the heat consumed. Steam is generated in a boiler 4 and passes into a pipe 6 having branches 6<a> leading to heat exchangers 7. Circulating water is reheated in the heaters 7, passes to the radiators 3, and returns through a pulsating device 1, 2. The returning water may be divided by a valve 9, part passing through the heater 7 and part returning direct to the radiators so that the temperature may be regulated. The condensed steam passes from the heater.7 through a small heat exchanger 12, and the reheated water together with the water of condensation pass through a meter 11, which measures its volume and thus indicates the number of heat units consumed. A modified arrangement is described in which the valve 9 is omitted and a simple valve substituted which controls only one of the conduits. The circulation may be accelerated by an injector utilizing the steam generated in the heat exchangers.
Patent GB-419935-A (GB)
Title: Improvements in and relating to alternating current power transmission circuits
IPC: G05B11/01
Filed: 1933-02-15
Abstract: 419,935. Protective arrangements. FITZGERALD, A. S., 433, Warwick Road, Wynnewood, Pennsylvania, U.S.A. Feb. 15, 1933, No. 4693. [Class 38 (iv).] Relates to an arrangement for interconnecting power networks so that power can flow in one direction between them but not in the reverse direction. Comprises a pair of grid controlled valves 5, 6 connected oppositely in parallel inserted in one of the leads interconnecting the networks 1, 2. The grid potentials of the valves 6, and 5, respectively are substantially in phase and 180‹ out of phase with the voltage of the circuit 1. When power tends to flow from the network 1 to the network 2 the anode and grid potentials will be in phase and the valves will conduct alternately. If, however, current tends to flow in the opposite direction the anode potentials become 180‹ out of phase with the grid potentials and the valves become non-conductive. With this arrangement, in the case where the network 2 is fed through two or more feeders, and a fault develops at the point X current is prevented from flowing to the fault through a parallel feeder and the network 2. Where it is desired that power should flow in either direction below a predetermined value a relay 14 energized from a current transformer 16 is provided. This normally short-circuits the primary of the grid transformer so that the grid control is ineffective. When the predetermined load value is reached this relay operates rendering the grid control effective. In the arrangement shown on the right of the Figure the valves are connected in circuit through a transformer 17. Two such devices may be used to connect a load to two supplies so that in the event of failure of one of the supplies the load is still supplied, no switching operation being necessary.
Patent GB-841988-A (GB)
Title: Improvements in a hand brake arrangement for use in a railway car truck
IPC: B61H5/00
Filed: 1956-09-07
Abstract: 841,988. Disc brakes. AMERICAN STEEL FOUNDRIES. Sept. 7, 1956 [Sept. 8, 1955], No. 4770/57. Divided out of 841,986. Class 103 (1). In a disc brake for a railway car truck, a hand brake arrangement is provided in which the truck carries a support bracket 18 having pivoted thereto, on each side of the brake disc 14, brake levers 20, 21, pivoted at 22 to the bracket in a vertical axis; one of these levers, 21, being provided with an arm 49 which is interengageable with an arm 46 on a hand lever 44, pivoted to lever 20 at 45, such that when the hand lever 44 is actuated, the friction pads 25 secured to the brake levers 20, 21 are moved towards the axially extending sides 15 of the brake disc 14 by the fulcrum contact 50 of arm 49 with arm 46. Specification 841,987 is referred to.