baber/WOPTO huggingface dataset:
Patent GB-692124-A (GB)
Title: Improvements in or relating to machines for grading objects by weight
IPC: B07C5/22
Filed: 1951-03-29
Abstract: 692,124. Grading fruit &c. by weighing. BARRON, D. C., and BARRON, A. J. Oct. 11, 1951 [March 29, 1951], No. 7348/51. Class 143 A machine for grading apples or other objects according to weight comprises a pair of spaced belts 2, Figs. 1 and 2, moving continuously round end pulleys 11', and provided with spaced socket members 3 to receive the ends of cross shafts 4 stretching from one belt to the other. Each shaft 4 pivotally supports a wire frame 7 on which is carried a canvas or like dished receptacle 8 to receive the apples, &c. which may be fed by hand from a tray 16. In the upper run of the conveyer, the belts 2 rest on the horizontal flanges of two angle-iron rails 5, the flanges being wide enough to leave free surfaces inwardly of the belts. On one of these surfaces slide a number of finger members 9, Fig. 4, secured to the wire frames 7 of the receptacles 8, which are thus held in a horizontal position to retain the apples. A series of gaps, cut in the free surface of the rails 5, are normally closed by members 10 which are carried on pivoted levers 11 bearing adjustable balance weights at their outer ends. If the charged into a shoot 14 when the finger 99 passes determined weight, . the finger 9 depresses the member 10 and the receptacle tilts about its pivot 4 and discharges the apple into an appropriate tray 12. The. receptacle is then carried forward hanging from its pivot. If the apple is not above the determined weight, the receptacle passes forward in a horizontal position to the next member 10, which is. set to operate at a smaller weight. The apples may. thus be separated into four or more grades, and any apples remaining are discharged into a shoot 14 when the finger 9 passes over an open gap in the rail 5. As the hanging receptacles 6 approach the right-hand pulley 1, they are turned to a horizontal position by an inclined plate 15 and fall again. into a hanging position as they pass the pulley 1. The fingers 9 are preferably bent backwards as shown in Fig. 4. The trays 12 for receiving the graded apples. may have a lateral slope to carry the apples to one side or the other of the machine, and may be lined with rubber or other suitable material.
Patent GB-1386421-A (GB)
Title: Crash sensing switch
IPC: H01H35/14
Filed: 1972-02-17
Abstract: 1386421 Inertia switches ALLIED CHEMICAL CORP 17 Feb 1972 [22 Feb 1971] 7365/72 Heading H1N A crash sensing switch comprises a housing 14, rollers 10, 12, guides 16, 18, a flexible spring band 20 held in tension by springs 46, 34 and extending along guides 16, 18 and around rollers 10, 12, switching contacts 32, 38, 42 being operable by movement of rollers 10, 12 off the end of guide surface 18. Under impact, roller 12 rolls off guide 18 on to reset device 52 which when pushed upwards by reset button 54 restores roller 12 to guide 18. Band 20 is of different effective stiffness at the points A, B, where band 20 leaves rollers 10, 12, for producing a net force under normal conditions urging rollers 10, 12 towards one end of band 20 against a stop 50. The difference in stiffness is achieved by cutting a slot in band 20 between points A and A<1>, A<1> being the point at which band 20 leaves roller 10 when the rollers have rolled fully to the right. To adjust the operating force to compensate for different thicknesses of band, part of the slot is tapered exponentially and the position on the taper at which band 20 leaves roller 10 is varied by moving rollers 10, 12 to the right by adjusting stop 50. Formulae are given for calculating the taper. Reference has been directed by the Comptroller to Specifications 1,181,636 and 1,217,947.
Patent GB-126141-A (GB)
Title: Improvements in Machines for Finishing Turbine Blades and similar Articles.
Inventor: MARTIN WILLIAM HAMILTON
IPC: F01D5/30
Filed: 1918-05-03
Abstract: 126,141. Martin, W. H. May 3, 1918. Turbines.-Turbine blades or the like are finished from bar-stock sections, during one traverse through the machine of a holder 4 carrying the blade. The holder 4 preferably has adjustable carriers 6 with interchangeable jaws 8, 9 pressed against the blade by wedges 10. The blade section may be first brought against an adjustable stop 12, then clomped in the jaws, and if not previously cut off the stock may be cut off by a saw 13. The base is then milled by a face cutter 14, and dovetail slots cut in the blade by two cutters 15, adjustable both laterally and longitudinally. The top is shaped by a cutter on the vertical spindle 16 Finally holes may be drilled in the blade for the stiffening wires, by means of adjustable drills 30 electrically or pneumatically driven, and having spring-pressed guiding-sheaths with shaped ends to bear against the blade surface and guide the drill.
Patent GB-872983-A (GB)
Title: Process for the preparation of polycarbonates
IPC: C08G18/44
Filed: 1959-03-04
Abstract: Polycarbonates of molecular weight 700-5000 and having terminal hydroxyl group are made by heating 1 mole of a cyclic glycol carbonate with 0,01-0,20 moles of an organic compound having at least two active-hydrogen atoms (other than a polyhydric alcohol) at above 100 DEG C. and in the presence of a basic substance as catalyst. Heating is preferably effected at 150 DEG -225 DEG C. in an autocalve under autogenous pressure, e.g. up to 3000 p.s.i.g. Specified glycol carbonates are ethylene-, 1,2-propylene-, 1,2-butylene-, 2,3-butylene-, vinyl ethylene-, methyl vinylene-, ethyl vinylene-, propyl vinylene-, and dimethyl vinylene carbonates.  The active-hydrogen compound may have its active-hydrogen atoms in the form of amino, mercapto, carboxylic or carbamate groups and specified compounds are di-hexamethylene diamines, piperazine, 1,2-ethanedithiol and ethanolamine. Specified catalysts are alkaline reacting carbonates, bicarbonates and hydroxides, trisodium phosphate, and aliphatic and heterocyclic tertiary amines.  The polycarbonates may be reacted with polycarboxylic acids (e.g. phthalic, adipic, succinic, maleic and fumaric acids) to form alkyd resins useful as moulding, laminating, coating and impregnating agents.  They may be reacted with isocyanates to form urethanes or polyisocyanates (e.g. toluene diisocyanate) to form polyurethanes. Foams are made by effecting the polyurethane forming reaction in the presence of a foaming agent (e.g. water) and, if desired, a cross-linking agent (e.g. glycerol).  Examples describe the manufacture of polycarbonates by heating ethylene carbonate with piperazine or ethane dithiol in the presence of potassium carbonate.ALSO:Polyurethane foams are made by reacting (1) a polycarbonate resin of molecular weight 700-5,000 obtained by heating 1 mole of a cylcic glycol carbonate with 0,01-0,20 moles of an organic compound having at least 2 active hydrogen atoms other than a polyhydric alcohol (see Group IV(a)), (2) a polyisocyanate, e.g. toluene diisocyanate and (3) a foaming agent, e.g. water.  The resulting elastic foam serve as crash pads or upholstery pillows. Rigid foam, obtained by including a cross-linking agent (e.g. glycerol) in the reaction mixture are useful as insulating materials in aircraft and as insulation for heating and cooling ducts.
Patent GB-559910-A (GB)
Title: An improved differential gear for the selective coupling of one or two power input units to a common output member
IPC: F16H3/44
Filed: 1942-06-03
Abstract: 559,910. Propelling ships &c. SELF-CHANGING GEAR CO., Ltd., WILSON, A. G., and MILLER, A. A. June 3, 1942, No. 7550. [Class 114] [Also in Group XXIV] Two input power units are coupled together to drive a single output member by two epicyclic gear trains arranged so that one gear ratio is obtainable when both input units are used together and various alternative gear ratios are selectively obtainable when either is used singly. As shown two power units E, E', drive a single propeller shaft l<SP>1</SP>. The shaft a of the unit E has a sun pinion b, and a toothed annulus d. The shaft k of unit E<SP>1</SP> has a gear h meshing a gear g which has a toothed annulus f, a gear n<SP>1</SP>, and carries planetary pinions m meshing with the annulus d and with a sun gear o on a freely supported sleeve p. Planet pinions e carried by the driver shaft l<SP>1</SP> mesh with the annulus f and sun b. The proportions of the gears are such that when the two power units revolve at the same speed the sleeve p is stationary. If there is prolonged unbalanced running the sleeve p rotates. The sleeve p may then be held stationary by clutching a gear t to the sleeve p by a clutch s<SP>1</SP>, t<SP>1</SP>, so as to drive through gearing t, u, a reversible oil pump v which operates brake bands r to engage the sleeve p. The pump v can also be driven from the shaft a by clutching a gear y thereto by clutch y<SP>1</SP>. Thus when both power units work together or singly the sleeve p remains or is held substantially stationary. A further speed ratio is obtained when using the power units singly by engaging a clutch member w on the shaft a with the sleeve p whereupon a solid drive results. The clutch member w is actuated by pressure from pump v or a pump n<SP>3</SP> the latter being driven from the gear n<SP>1</SP>. When the power units are used singly the unit not in use is freely rotated. Two sets of power drives as above described may be used side by side for driving a pair of ship's propeller shafts.
Patent GB-472226-A (GB)
Title: Improvements in or relating to the packing of tin and like plates
IPC: B65D59/00
Filed: 1936-03-13
Abstract: 472,226. Packages. MONTAGUE, E., BROWN, W. R., and STRATTON, W. March 13, 1936, No. 7607. [Class 94 (i)] In the packing of tin plates and the like, a stack is placed so that the bottom part is received in a tray like member, and a complementary cover member shown inverted and partly opened out in Fig. 1, is placed over the top, closed in on the stack, and secured by ties. The cover member comprises vertical walls a, d, g with corners j and having flaps f, h, i, secured to them. When the cover is placed over the stack, the flaps f overlie the flaps h, i, as seen from beneath in, Fig. 2, and the abutting edges b form a vertical joint which is covered by overlaps e inside and out.
Patent GB-199438-A (GB)
Title: Improvements in apparatus for the manufacture of printing plates or surfaces for printing from
IPC: B29C43/00
Filed: 1922-03-16
Abstract: 199,438. Walker, A. J. N. March 16, 1922. Embossing; printing-surfaces.-In apparatus for moulding printing-plates of celluloid or similar material, as described in Specification 113,460, means are provided whereby hot fluid under low pressure may be admitted to the inflatable mattress to soften the celluloid &c. and cold fluid under high pressure afterwards admitted to effect the moulding operation. The rubber mattress or diaphragm 9 having a thin central portion 9<a> is clamped by its rim 11 between the body 1 of the follower and a ring 7. An inlet 14 for highpressure cold water and a similar inlet for lowpressure hot water communicate with an annular chamber 16 from which the water passes to the back of the mattress 9 through a perforated plate 17. The outlet pipe (not shown) is provided with a valve adapted to open when a predetermined pressure is exceeded. A chamber 23 covered by a thin steel cover plate 24 is provided in the press table and is connected to branch pipes from the hot and cold water pipes supplying the mattress. The matrix 25 with the superposed celluloid &c. sheet 10 is surrounded by one or more plates 26 provided with grooves 26<a> for the escape of gas or liquid during the moulding operation. The follower may be raised and lowered mechanically or, as shown, by a hydraulic or pneumatic ram 6. An intermittently actuated endless conveyer comprising steel slats 38 secured to side chains 39 carrying rollers 42 may be provided to carry the matrices with the superposed celluloid &c. sheets through the press and this conveyer may pass through a steam-heated chamber to heat the celluloid immediately before it passes into the press, and over a hollow water-cooled table after leaving the press. The valves controlling the admission and exhaust of the pressure fluid to the mattress and to the ram 6 may be automatically actuated in the proper sequence by cams arranged on a motor-driven shaft, and this shaft may also actuate ratchet gear for feeding the conveyer.
Patent GB-1151038-A (GB)
Title: Apparatus for Supporting a Stretcher.
IPC: A61G3/00
Filed: 1968-02-16
Abstract: 1,151,038. Ambulance vehicles. BINZ & CO. 16 Feb., 1968 [18 Feb., 1967], No. 7722/68. Heading B7B. A stretcher platform 13 is pivoted at 12 to a bracket 11 on a support 10, and carries at its free side a sleeve 28 in which the hook member 29 is slidable against spring action. The end 29a of the hook member engages over a foot of a stretcher placed on the platform to retain it in position thereon, and when the platform is in the stowed position the hook engages a fixed eyelet 33 to retain the platform in position. The platform is also provided with a member 19 with a chamfered end and the other foot of the stretcher is engaged under this member.
Patent GB-743793-A (GB)
Title: Improvements in and relating to water-cooling towers
Inventor: WILLIAMSON GERALD JOHNSTONE
IPC: F28F25/08
Filed: 1953-03-20
Abstract: 743,793. Cooling-towers. IMPERIAL CHEMICAL INDUSTRIES, Ltd. Feb. 26,1954 [March 20, 1953], No. 7734/53. Class 64(1). In a water cooling tower containing both packing L and one or more vertical partitions P, P<SP>1</SP>, apertures A are provided in the lower part of the partition or partitions to equalize pressures on opposite sides and so prevent recirculation of air which has left the tower at the top. The openings may be provided with louvres S which may be adjustable, or with adjustable slides.
Patent GB-1174086-A (GB)
Title: Improvements to Capacitor-Commutated Circuits
Inventor: BURCH DEREK ERNEST
IPC: H02M1/06
Filed: 1967-02-17
Abstract: 1,174,086. Inverters. WESTINGHOUSE BRAKE & SIGNAL CO. Ltd. 26 Jan., 1968 [17 Feb., 1967], No. 7762/67. Heading H2F. [Also in Division H3] In a capacitive commutating circuit for a controlled rectifier, a current path is provided through which the capacitor discharge current may be switched after a predetermined time period, to improve the load voltage regulation. In one basic form of the circuit, Fig. 2, the controlled rectifier Tr1 is provided with a conventional commutating circuit C, Tr2 and with a by-pass circuit comprising a controlled saturable reactor SR. Firing controlled rectifier Tr2 discharges capacitor C, and after a predetermined time winding P saturates to provide a discharge path which by-passes the load Z. The time period is set by adjusting the current through the control winding S, to give sufficient time for the rectifier Tr1 to turn off. Instead of being connected in shunt, as shown, the control winding may be connected in series with the load, Fig. 4 (not shown), in shunt via a third controlled rectifier (Tr3), Fig. 5 (not shown), or across the rectifier Tr2, Fig. 6 (not shown). The commutating circuit may be employed in an inverter, Fig. 7, employing a pair of controlled rectifiers 4, 5 which are alternately commutated by capacitor 9 in known manner. Each controlled rectifier 4, 5 is provided with its own by-pass saturable reactor 11, 12, the two control windings being connected in series across the D.C. input terminals 1, 2.
Patent GB-198478-A (GB)
Title: Improved means for attaching handles to long handled brushes or similar articles
IPC: B25G3/12
Filed: 1922-03-17
Abstract: 198,478. Harborne, T. L., and Greenslade, Ltd., E. A. & W. March 17, 1922. Fixing by separate sockets with toothed holding devices.-A fixing device for broom and like handles of the type having claws or spikes for engaging the socket, such as are described in Specifications 6277/99 and 178,311, is made from a blank d formed with the claws f and bent into a tube d', Fig. 3, the edges being seamed or riveted together, as distinguished from a split tube as described in the prior Specifications referred to. The tube is fixed in the socket of the broom head g as shown in Fig. 3, no nails or claws being necessary to secure it to the handle h.
Patent GB-1531544-A (GB)
Title: Preparation of low and medium density ethylene polymer in fluid bed reactor
IPC: C08F210/16
Filed: 1976-02-27
Abstract: 1531544 Polymerization of ethylene UNION CARBIDE CORP 27 Feb 1976 [10 March 1975 14 Jan 1976] 7852/76 Heading C3P Solid copolymers of ethylene having a density of 0À90 to 0À941 gm./c.c. and a melt index greater than zero and less than 2 are prepared by copolymerizing ethylene with a C 3 -C 6  alpha olefine in an amount to provide 1 to 15% of the alpha olefine in the polymer at a pressure of less than 1000 p.s.i.g. in a fluidized bed of particles of a thermally activated supported catalyst having a particle size of 50 to 200 microns and containing 0À05 to 3% by weight of Cr, at least part of which is in the hexavalent state, 1À5 to 9À0% by weight of Ti and 0À0 to 2À5% by weight of F, at least a portion of both the Cr and the Ti being in the form of oxides. The support may be, e.g., silica, alumina, zirconia or thoria. The olefin may be propylene, butene-1, pentene-1 or hexene-1. In the examples ethylene is copolymerized with butene-1 in the presence or absence of hydrogen in a fluidized bed of a catalyst prepared by reacting silica with an aqueous solution of CrO 3 , subsequently with tetraisopropyltitanate and then in some cases with (NH 4 ) 2 SiF 6 , followed by thermal activation. Reference has been directed by the Comptroller to Specification 1,429,174.
Patent GB-724897-A (GB)
Title: Improvements in control systems for motive equipmentsh
Inventor: SIMMONS JAMES DOUGLAS
IPC: G01C21/18
Filed: 1948-03-16
Abstract: 724,897. Automatic control systems. METROPOLITAN-VICKERS ELECTRICAL CO., Ltd. March 11, 1949 [March 16, 1948], No. 7904/48. Class 38 (4). In a control system comprising motive equipment, provision responsive to the energization of this equipment is made for adjusting at will the output of the control means with respect to its setting, to reduce energization of the motive equipment to zero, thereby rectifying drift. A control signal is derived at 4 from an A.C. supply 6, 7, and a gyro 1, amplified at 14 and applied through a metadyne 25 to a stabilizing servo motor 2. A regulator 3 controls the velocity of the motive equipment. When it is desired to eliminate drift from the system, the regulator 3 is set to zero and a switch 31 closed so that a motor 29 adjusts a potentiometer 15 until there is no voltage drop across a resistance 26. To overcome friction and make the system more sensitive, movement of the motive equipment causes contacts 21, 22 or 21, 23 to close in a sense augmenting the control signal. Specifications 616,516, 664,065 and 724,898 are referred to.
Patent GB-872129-A (GB)
Title: Process for the production of 3ª-, 12ª--dihydroxy-11-oxo-23-bromospirostane
IPC: C07J75/00
Filed: 1960-03-07
Abstract: The invention comprises 3b ,11 a -diacetoxy-12-oxo-23-bromospirostane and a process for the preparation of 3b ,12b -dihydroxy-11-oxo-23-bromospirostane by reacting 11b ,23-dibromohecogenin acetate with an alkali metal acetate in an organic solvent at a temperature between 50 DEG  and 155 DEG C., separating the sparingly soluble impurities from the resulting mixture of 3b ,11(a  and b )-diacetoxy-12-oxo-23-bromospirostanes (the 11a  isomer predominates), and hydrolysing the compounds of the mixture by heating with aqueous or aqueous-alcoholic alkali.  The organic solvent may be alcohol or a solvent in which the alkali metal acetate is soluble such as t-butanol or dimethyl formamide. p Detailed examples are given.  Specification 721,953 is referred to.
Patent GB-661775-A (GB)
Title: Improvements relating to gas-conveying ducts
IPC: F16L43/00
Filed: 1949-03-24
Abstract: 661,775. Junction pieces. DAVIES, L. G. March 21, 1950 [March 24, 1949]. No. 7982/49. Class 99 (i). A connector 20 of flexible sheet material for forming a bend of adjustable angle in a rectangular gasconveying duct 29 is partially divided at its corners and has two sides 26, 28 with edges symmetrically curved in arcuate form the centres of the arcs lying at the ends 21, 24 of the divisions and two sides 25, 27 of a free length not less than the length of the curved edges so that one of the sides 27 forms the outside of the bend and the opposite side forms a hinge piece on the inside of the bend. The corners at each end may be divided so that two bends in the same plane or at right angles to each other can be made and the connector may be of elbow or tee form. U.S.A. Specification 1,909,309 is referred to.
Patent GB-669881-A (GB)
Title: Improvements in and relating to shaft seals for pumps
IPC: F16J15/36
Filed: 1950-03-30
Abstract: 669,881. Stuffing-box substitutes. BRITISH THOMSON-HOUSTON CO., Ltd. March 30, 1950. [April 6, 1949] No. 8002/50. Class 122(v). In a pump, having a chamber floor formed with an annular cavity 32 through which extends a shaft 15 carrying an impeller 22, a sealing assembly comprises a sealing ring 24 rotating with the impeller and in engagement with a flange portion 28 of a seal member 27, a flexible diaphragm 30 having a neck portion supporting a sleeve portion 27a of the seal member and an enlarged outer rim in engagement with the bottom and side walls of the cavity, and spring means 35 pressing directly or indirectly against the underside of the diaphragm at the junction of the sleeve and flange portions of the seal member to urge the latter against the sealing ring. A grease channel 29 may be provided in the seal member which may be of lead-bronze or carbon. The sealing ring may be of stainless steel on a plastic material such as nylon. In another embodiment a stiffening ring is interposed between the spring and the diaphragm.
Patent GB-339219-A (GB)
IPC: F01K7/20
Filed: 1930-03-12
Abstract: 339,219. Ruthsaccumulator Aktiebolaget. March 14, 1929, [Convention date]. Steam-supply, methods of. -In a, turbine or condensing engine plant wherein the engine is supplied from high and low-pressure sources, a connection equipped with a non-return valve is provided between the sources, to facilitate the control of the plant. The turbine 1 is supplied from the main 2 connected to a boiler plant or to a back-pressure turbine, and from the main 3 connected to a steam accumulator. The branches 2, 3 are connected by a branch 8 provided with a non-return valve 9 and a fluid-pressure controlled throttle valve 7. The turbine is connected to the mains 8 and 3, and valves 5, 6 therein are controlled by a governor 4.
Patent GB-658555-A (GB)
Title: Improvements relating to egg-whisks
IPC: A47J43/10
Filed: 1949-03-25
Abstract: 658,555. Mixing-appliances. GILL, E. March 25, 1949, No. 8135. [Class 86] In an egg-whisk of the kind having a cage formed from a wire spiral bent into the form of a toroidal coil and attached to the lower end of an archemedian screw which is given rotary reciprocation by axial reciprocation of a handle, the cage is secured to the screw by a sleeve having a castellated end edge forming teeth which engage between and space apart the coils of the cage. As described the coil is threaded into the sleeve and is rotated until the wire of the spiral has passed through all the castellations. As shown, the sleeve 5, which has castellations 5b on its lower edge, is pressed upon a tapered cap 2 on the archimedian screw 3 to secure the coils of the cage 1 by wedge action.