baber/WOPTO huggingface dataset:
Patent GB-132030-A (GB)
IPC: E01C19/34
Abstract: 132,030. Pritchard, J. E., and Rock, T. Sept. 3, 1918. Rammers.-Consists in providing a power-operated ramming-machine with a, series of rammers mounted in a frame arranged at one end of and transversely to the length of the main frame, the rammer frame being automatically moved transversely of the length of the main frame by power operated means during the ramming operation. Means are also provided for rendering any or all of the rammers inoperative. The complete machine is shown in plan in Fig. 5, and in sectional side elevation in Fig. 8. All the working parts are driven from a shaft 98, which is connected with the prime mover 105 by spur-gearing 107, 108, 110 and a worm drive 96, 97. The rammers 162, vertically movable in guides in a box-shaped frame 148, are provided with rollers 164 whereby they are raised successively by cams 157 on a continuously rotating shaft 156, the rammers falling by their own weight on to the paving. Springs 172 serve to keep the rammers normally raised above the road surface. The frame 148, guided by rollers 159, 190 in the main frame of the machine, is reciprocated transversely during the ramming operation, by rack and pinion gear 147, 138. The pinion 138 is connected by a shaft 137 with a pinion 136 engaging a rack 133, which is reciprocated in guides on the vehicle frame by an eccentric 129 and eccentric-rod 131, the eccentric being driven from the shaft 98 by bevel and spur gearing 100, 125, 126. The shaft 98 is also connected through spur gears 104, 111 and chain and sprocket gear 114, 155, 153 to a transverse shaft 152, from which the cam shaft 156 is driven. A clutch 117 on the shaft 113 of the sprocket 114 can be operated by a hand-lever 119 to stop the rammers when desired, and the movement of the rammer frame may be stopped. by means of a hand-lever 193 and clutch 196 operating on the bevel-wheel 100. For propulsion. the rear wheels 73 of the vehicle are connected by chain and sprocket gearing to a countershaft 75 driven from the shaft 98 through two independent sets of spur gearing, one for forward motion and the other for backward. Stoppage and reversal of the driving gear is effected by a clutch 80 controlled by a hand-lever 84 through a transversely sliding shaft 82 For steering purposes, the front wheels 61 are moved round a vertical pivot on the frame by bevel gearing operated by a handle 71. The rammers may be separately rendered idle by raising them out of the path of their cams by means of a lever device 181, the arm 172<1> of which normally occupies a position clear of the slot 163 in the rammer. On rotating an eccentric 178, the lever arm is moved into the slot 163 and the handle 181 can be depressed to raise the rammer, which is then held raised by a catch 182.
Patent GB-973066-A (GB)
Title: A transistor amplifier
Inventor: SKINNER RICHARD ALFRED
IPC: H03F3/19
Filed: 1963-04-03
Abstract: 973,066. Transistors amplifying; switching circuits. LEEDS & NORTHRUP CO. April 3, 1963, No. 13221/63. Heading H3T. The collector load resistance of a common emitter input transistor is connected in a loop circuit including the emitter-collector path of a further transistor, and sources of collector potential and forward base-biasing potentials for the further transistor, a ground connection being made to the base-biasing potential such that the potential between ground and the base of the further transistor is effective through the conductive base-emitter junction of the further transistor to maintain the collector of the input transistor at a high potential and to maintain a low impedance between the collector and ground. The collector of input transistor 10 is connected as shown through common base transistor 11 to output terminal 13, transistor 11 being biased by sources 19, 21 to be conducting for all values of collector current of transistor 10 and maintained in a non-saturated condition by supply 24 and resistor 25. Since the emitter-base junction of transistor 11 is forward biased and hence has a low impedance, the collector of transitor 10 is kept at the constant negative potential of source 21. The effective capacitance between the collector and base of transistor 10 and hence the internal high-frequency feedback of this transistor is minimised due to the high constant potential difference between the collector and base. The feedback is further minimised by providing a low impedance path to ground for high frequencies since the point 31 is connected to ground through the low impedance path of transistor 11 and source 21. The emitter current of transistor 10 is limited to a maximum valve determined by the current from a constant current source 14, 15 which maximum valve is insufficient to saturate the transistor. If the input signal from 12b is such as to produce conductivity of transistor 10 below the maximum value the difference between the emitter current and the current from the constant current source flows through diode 16 and the amplifier acts as a common-emitter stage with high gain. As the input signal becomes more negative the emitter current increases until it has reached the value of the current from the source 14, 15 when diode 16 is reverse biased and the amplifier operates in a manner similar to an emitter follower. Limiting of the input signals is also achieved by including diode 30 in the circuit. Transistor 11 may be of PNP conductivity type or both transistors may be of NPN conductivity types.
Patent GB-304971-A (GB)
Title: Improvements in and relating to cooking pans
IPC: A47J36/08
Filed: 1928-05-04
Abstract: 304,971. Jones, H. W. May 4, 1928. Lids and covers.-In a saucepan having a lid 4 with an aperture 5 in the flange for engaging with corresponding holes 2 in the wall of the saucepan for draining purposes, the lid is attached to the saucepan by a bayonet joint and stud 6<x> so arranged that the aperture in the lid cannot be brought into register with the aperture in the pan until the interlock is effective, and that the lid can only be removed from the pan when it occupies one defined position relative thereto. Specification 236,791 is referred to.
Patent GB-812272-A (GB)
Title: Improvements in disc brakes
Inventor: BUTLER HENRY JAMES
IPC: F16D65/18
Filed: 1955-05-07
Abstract: 812,272. Disc brakes. DUNLOP RUBBER CO. Ltd. April 25, 1956 [May 7, 1955], No. 13264/55. Class 103 (1). In a " spot-type " disc brake, the brake disc is rotatable in a fixed casing and the housing containing the friction pads and fluid pressureoperated mechanism is fitted in an aperture in the casing and is detachably secured thereto. In the embodiment illustrated the brake comprises a flanged boss 1 attached to the rear axle housing 2 of a vehicle and a disc 17 is secured to and rotatable with a wheel. The rear axle or half-shaft 7 passing through axle housing 2 and outwardly of boss 1 is secured to the hub of the wheel 8. A sleeve 10 is secured to the inner periphery of the wheel 11 by bolts 12 and the disc 17 is provided with a splined connection 14, 15 with the sleeve 10; the disc, however, being axially fixed in operation by means of pin 15a. Secured to the fixed flanged boss 1 is a cylindrical outer member 20, formed with two diametrically opposed rectangular openings for the insertion and removal of rectangular, arcuate cover-plates 26 containing the piston and cylinder mechanisms to actuate cylindrical friction pads 29 located in horizontally opposed cylinders 28 adjacent the opposite radial faces of the brake disc 17. Within the annular space bounded by sleeve 9, flanges 1a and 21, outer member 20, coverplates 26 and flanges 13 and 23 is a completely liquid-tight chamber such that cooling liquid may flow around the space and cool the disc 17 and ancillary equipment. A liquid seal 45, 46 is inserted between a rotatable and non- rotatable portion of the brake and urged into liquid-tight sliding relationship with a resilient flexible metal annulus 48 and the admission of grit, dust or mud into the interior of the brake is prevented by the provision of an annulus 71 provided in close proximity of the disc 11 of wheel 8. Cooling liquid is conveyed from inlet connection 65 to chamber 51 and thence to a heat exchanger via outlet connection at 66 to a heat exchanger. A circulating pump (not shown) is incorporated in the circuit for this purpose. The brake disc 17 may have formed therein a series of pockets 67 so disposed that they produce a centrifugal effect. The cooling liquid used may be oil or water and glycol. Alternatively, the brake may be caused to operate as a " dry brake " or with the inlet connection connected to an air compressor and the outlet connection being left open to atmosphere. Specification 688,382 is referred to.
Patent GB-514396-A (GB)
Title: Improvements in metal panels, such as furnace dampers, hearths and the like
IPC: F23L13/00
Filed: 1938-05-04
Abstract: 514,396. Dampers; hearths &c. SOC. ANON. DE COMMENTRY-FOURCHAMBAULT & DECAZEVILLE. May 4, 1938, No. 13282. Convention date, May 12, 1937. [Classes 51 (i) and 51 (ii)] Metal panels suitable for the construction of furnace dampers, hearths and the like are composed of separate elements which in the case of rectangular elements are articulated at their edges. The elements are provided as shown in Fig. 2 with tongues 2 and sockets 3 in their edges for mutual engagement. Figs. 7, 8, 9 and 10 show modified forms of connections between the elements. The elements of a panel may be made of different materials.
Patent GB-499102-A (GB)
Title: Improvements in or relating to the automatic regulation of parallel connected electric generators
IPC: H02J1/10
Filed: 1938-05-04
Abstract: 499,102. Electricity supply. SOC. D'APPLICATIONS ET DE FABRICATIONS INDUSTRIELLES. May 4, 1938, No. 13374. Convention date, May 4, 1937. [Class 38 (iv)] Running generators in parallel.-To equalize the load on an even number of generators D1, D2 each of which has a voltage regulator R1, R2, each regulator is directly acted upon by an opposing coil 6<1>, 6<2> carrying the current delivered by another generator. Where more than two machines are concerned the machines are grouped in pairs and the two regulators of each group carry further windings assisting the windings 6 and energized by the current output of another group. The regulators may have additional coils 8<1>, 8<2> carrying the total output and arranged to produce under or over compounding.
Patent GB-210686-A (GB)
Title: Improvements in and connected with the casting of dentures in metal
IPC: B22D13/06
Filed: 1923-05-18
Abstract: 210,686. Hobday, H. L., and Nunn, F. W. May 18, 1923. Casting-machines; moulds; flasks.-The metal for a dental casting is melted in a cup 11 embedded in the investment 5 and formed with a part roof 12 with depending flange 13 serving to prevent the metal from spilling on commencing rotation in a centrifugal casting machine comprising a balanced arm 8 with a hinged basket 7 containing the flask. The machine may have a horizontal axis, in which case the basket is rigidly attached to the arm. The metal enters the mould through a number of small openings 15 communicating with the main sprue 14. Specification 201,971 is referred to.
Patent GB-803288-A (GB)
Title: Polymerization of organopolysiloxanes
IPC: C08G77/08
Filed: 1955-05-09
Abstract: In preparing a higher viscosity siloxane from a lower viscosity cyclic siloxane of the formula [(CH3)2SiO]n, wherein n is at least 3, or a mixture of siloxanes containing at least 50 per cent by weight of the cyclic dimethylsiloxane, the remainder of the mixture being a cyclic siloxane of the formula [R.R1SiO]m, wherein R is methyl, ethyl or phenyl, R1 is ethyl or phenyl, and m is at least 3, with or without intercondensed monomethylsiloxane and/or trimethylsiloxane in amount such that the R/Si ratio is within 1.9 to 2.01, solid tetramethyl- or benzyltrimethyl - ammonium hydroxide in amount of from 0.004 to 0.2 per cent (by weight of the siloxane(s)) is added to the siloxane or siloxane mixture and the resulting mixture is heated, e.g. to within the range 75 DEG  to 130 DEG  C.  After the desired degree of polymerization has been obtained, the product is heated to above 150 DEG  C. to decompose the rearrangement catalyst. Examples are given.  Uses.-Gels obtained by the invention may be used as potting gels in high temperature electrical apparatus; gums obtained by this invention may be compounded with a filler, e.g. silica aerogel and benzoyl peroxide to form rubbers for use as wire insulation and gasket material.  Specifications 583,875, [Group IV], and 722,482 are referred to.
Patent GB-1341607-A (GB)
Title: Process for manufacturing anhydrous chromium sesquioxide vy reduction of a hexavalent compound of chromium
IPC: C01G37/02
Filed: 1971-05-06
Abstract: 1341607 Chromium sesquioxide CERAVER 6 May 1971 [6 May 1970] 13570/71 Heading C1A [Also in Division B1] Anhydrous chromium sesquioxide is made by subjecting a dried hexavalent chromium compound, preferably chromium trioxide which is not decomposed thermally under 300 C. in the absence of a reducing agent, to heating in a non- reducing atmosphere at between 197 C. and 280 C. and then to heating in a reducing atmosphere between 250 C. and 350 C. An organic amino compound as reduction catalyst, e.g. pyridine may be added to the hexavalent chromium compound. The reducing atmosphere may be hydrogen or a mixture of hydrogen and inert gas. In the examples a rod of Al 2 O 3  is impregnated with solution containing 1 kg/litre of CoO 3 , pyridine being added to the solutions in Examples 2-5, the rods dried in an oven, non- reducing atmospheres of air or nitrogen and a temperature of 240 C. being used for the first step and reducing atmospheres of hydrogen with or without nitrogen at 280 to 340 C. for the second step. It is also possible to impregnate Cr 2 O 3 , ZnO, MgO, or SiO 2  (e.g. for the manufacture of catalysts) with the CrO 3  solution.
Patent GB-475123-A (GB)
Title: Improvements in cowled motive-power plants
IPC: B64D33/10
Filed: 1936-05-14
Abstract: 475,123. Propelling aircraft. SOC. FRANCAISE HISPANO-SUIZA. May 14, 1936, No. 13656. Convention date, Dec. 24, 1935. [Class 4] [Also in Group XIII] A radiator of arcuate cross-section surrounds the crank-case of, e.g. an aircraft engine, on the side opposite the cylinders. In one form a V-cylinder aircraft engine is mounted on triangulated framework 5 and is surrounded by a cowl 2 having an adjustable air inlet 7 and an air outlet 9. The radiator 3 is arranged in the air stream and under the engine. The radiator may be rectangular or of polygonal longitudinal section. In a modification, two radiators, one for water and the other for lubricating oil, are arranged one above the other and in this case the air for each radiator may be guided by partitions. The radiator for the lubricating oil may be embedded in or disposed between two parts of or behind the radiator 3 as shown in Fig. 8. In this latter case, partitions may be provided to separate the air supplied to and passing through each radiator. The invention may be applied to inverted-V-cylinder engines.
Patent GB-1511261-A (GB)
Title: Analogues of prostaglandins and process for their manufacture
IPC: C07C67/00
Filed: 1975-04-03
Abstract: 1511261 Prostaglandins HOECHST AG 3 April 1975 [3 April 1974] 13698/75 Headings C2C and C2P The invention comprises optically active prostaglandins of the Formulµ I, X and XI and racemates thereof, wherein R<SP>1</SP> and R<SP>2</SP> together form an oxo group, or one of R<SP>1</SP> and R<SP>2</SP> is H and the other is OH; one of R<SP>3</SP> and R<SP>4</SP> is H and the other is OH; R<SP>5</SP> is C 1-8  alkyl, C 2-8  alkenyl, C 2-8  alkynyl, C 2-8  oxoalkyl or the ethylene acetal or ethylane dithioacetal thereof, C 2-8  hydroxyallyl, the OH group being attached to the terminal carbon atom thereof, or C 2-8  carboxyalkyl; X is C 1-5  alkylene, phenylene optionally substituted by one or more C 1-3  alkyl groups, or radicals of the formulµ which are optionally substituted by one or more C 1-3  alkyl groups; and wherein the pair of carbon atoms at positions 5 and 6 and 13 and 14 are either both linked by single bonds or both linked by double bonds, with the proviso that when R<SP>5</SP> is alkyl, X must be a branched alkylene, and salts and esters of the prostaglandins of the Formula I, and their preparation by standard methods. Intermediates used in the preparation of the above prostaglandins are also prepared. Phosphonates of the formula wherein R<SP>10</SP> is 2-ethoxy-1,1-dimethylethyl, 2- allyloxy - 1,1 - diemthylethyl, 2 - methylpropoxy - 1,1 - dimethylethyl, 2 - methoxy - 1,1- dimethylethyl and 5 - methoxymethyl - 2 -  furyl, are prepared by reacting dimethyl methylphosphonate with esters of the formula in the presence of butyllithium. Pharmaceutical compositions, suitable for oral, parenteral, topical or rectal administration or by inhalation, contain the above prostaglandins of the Formula I or salts or esters thereof in admixture with pharmaceutically suitable carriers. The compounds possess prostaglandinlike pharmacological properties. The compositions may also contain other pharmacologically active substances such as diuretics or antidiabetics. Reference has been directed by the Comptroller to Specification 1,345,934.
Patent GB-675898-A (GB)
Title: Improvements relating to cinematographic projectors for alternative film sizes
IPC: G03B1/22
Filed: 1950-06-02
Abstract: 675,898. Kinematograph projectors. PAILLARD SOC. ANON. June 2, 1950 [June 30, 1949], No. 13826/50. Class 97 (i). Two cams, on the same shaft and parallel to the film plane, produce the feed movements of separate claws for feeding films of different widths. In the form shown, the films are fed past apertures 2, 3 by claws 9, 16 at the ends of arms 8, 15. Spring blades 12, 18 act on the ends 13, 19 of the claw arms and maintain the shoes 11, 20 thereon in contact with cams 6, 7 on a shaft 4. The film engaging movements of the claw 9 are produced by an annular face cam surrounding the cam 6, and of the claw 16 by an annular face cam formed on the end of the cam 6 and surrounding the cam 7. The arms 8, 15 are kept in contact with the face cams by their own resilience. A shutter 5, common to both projection apertures is carried on the shaft 4. The two projection apertures may be at the same side of the shaft 4.
Patent GB-494828-A (GB)
Title: Improvements relating to linear-dimension gauges, particularly of the finest-dimension type
IPC: G01B3/26
Filed: 1938-05-11
Abstract: 494,828. Linear - dimension gauges. HERBERT; Ltd., A., and CRAIG, R. May 11, 1938, No. 14017. [Class 106 (ii)] A plug gauge is formed of hard metal having its gauging surface away from the leading end chromium-plated, this one end not being plated. A " go " and " no go " cast steel plug gauge has the gauging surfaces 1, 2 connected by reduced portions 3, 3 to a roughened bodyportion 4. The gauging surfaces have formed on them shallow grooves 5, 6 between shoulders 7 and are then chromium plated. The operative surfaces are next ground to the requisite diameter, the dimensions being such that no chromium plate is left on the ends 7, a thin surface being left on the working surface of the gauge. This construction prevents flaking off of the chromium plating.
Patent GB-561943-A (GB)
Title: Improvements in or relating to optical objectives
IPC: G02B13/00
Filed: 1942-10-06
Abstract: 561,943. Optical objectives. TAYLOR, TAYLOR, & HOBSON, Ltd:; WARMISHAM, A., and WYNNE, C. G. Oct. 6, 1942, No. 14034. Drawings to Specification. [Class 97 (i)] In an objective comprising two simple divergent components spaced between two simple convergent components, the numerical sum of the radii of the front surface of the front component and the rear surface of the rear component lies between 90 per cent and 130 per cent of the equivalent focal length F of the objective, and the overall axial length between such surfaces lies between 40 per cent and 50 per cent of F. At least one of the convergent components is of material having mean refractive index between 1.7 and 1.8, the AbbÚ V number being greater than 50 and preferably below 58. All the materials used may have substantially the same relative partial dispersion and complete data are set out for two examples, wherein the convergent components are made of #-magnesium oxide crystal, both the divergent components being made of sodium bromide crystal or of extra dense flint glass. Specification 561,804 is referred to.
Patent GB-698764-A (GB)
Title: Improvements relating to connections in exhaust-pipes for internal combustion engines
Inventor: NALLINGER FRIEDRICH
IPC: F01N13/18
Filed: 1951-06-13
Abstract: 698,764. Pipe connections. DAIMLER-BENZ AKT.-GES. June 13, 1951, No. 14041/51. Class 99 (i). The sections 1, 2. 3 of an exhaust pipe are connected by a spherical joint formed partly or wholly by the pipe sections, and sealing between the sections is effected by a metal piston ring 10 located in a groove which may be formed in a ring 6 having a spherical surface and secured to the inner pipe by annular grooves 7, 8. To prevent separation of the joints the spherical portions of the pipes may be rolled inwardly; alternatively, inwardly bent tongues are used. Play in the joints may be taken up by the application of a resilient axial pressure, e.g. that of a spring at one end of the pipe; alternatively, axial tension or compression may be applied by helical springs, for example, associated with the joints. In a modification, the ring 10 is replaced by a layer of asbestos or graphite-containing material.
Patent GB-475503-A (GB)
Title: Improvements in and relating to processes for the preparation of unvulcanised rubber in granular or powdered form
IPC: C08C3/00
Filed: 1936-05-19
Abstract: Rubber coagulum, unvulcanized or substantially unvulcanized rubber, or rubber mixtures, plasticized rubber or reclaim are reduced to crumb by wetting the surface with an alkaline solution, while subjecting to mechanical division such as by shearing, mincing or repeated passage between differentially geared rollers.  The alkaline solutions may contain ammonia, caustic soda, sodium carbonate, sodium silicate or a soap and may be sprayed on the rubber during such passage.  A dusting agent such as zinc, aluminium or calcium stearate may be added during the later stages, while the crumb may be graded by sieving, and the coarser particles returned to the mill. Specifications 391,309 and 410,875, [both in Group V], are referred to.ALSO:Rubber coagulum, unvulcanized or substantially unvulcanized rubber or rubber mixtures, plasticized rubber or reclaim are reduced to crumb by wetting the surface with an alkaline solution, while subjecting to mechanical division such as by shearing, mincing or repeated passage between differentially geared rollers. The alkaline solutions may contain ammonia, caustic soda, sodium carbonate, sodium silicate or a soap, and may be sprayed on the rubber during such passage.  A dusting agent such as zinc, aluminium or calcium stearate, may be added during the later stages, while the crumb may be graded by sieving, and the coarser particles returned to the mill. Specifications 391,309 and 410,875 are referred to.