baber/WOPTO huggingface dataset:
Patent GB-329407-A (GB)
Title: Brake control mechanism
IPC: B60T13/04
Filed: 1929-02-26
Abstract: 329,407. Jackson, M. B. Feb. 26, 1929. Fluid-pressure.-A brake held out of action by fluid pressure comprises manually operable means holding the brake out of action when the fluid-pressure is inoperative which are released when the brake lever is moved to apply the brake. The brake is applied by a spring 9 bearing on the brake piston 5 which is held in the inoperative position by fluid pressure admitted by a port 11. The brake lever 17 is held by a spring 19 so as to maintain a relief valve 13 on its seat by means of a spring 14. Movement of the lever 17 to compress the spring 19 releases the pressure on the spring 14 and allows pressure to escape from the brake cylinder 1 and the brakes to be applied by the spring 9. A manually operated lever 25 pivoted at 26 and bearing on a collar 8 on the piston rod 6 maintains the brake inoperative when the fluid pressure is not available. The lever is maintained in this position by an arm 27 pivoted to the lever and engaging a projection 29 on the lever 17 until the lever 17 is operated to apply the brakes when this manual means is released.
Patent GB-622044-A (GB)
Title: Improvements in dough proofing chambers
IPC: A21C13/00
Filed: 1947-03-05
Abstract: 622,044. Dough provers. SEVILLE, J. R. March 5, 1947, No. 6282. [Class 28(i)] Each compartment of a dough prover is provided with a door or rolling shutter f such that when the door is slid upward to open it also slides across the open top of its compartment (along the guides g) thus isolating the compartment from the common air space r above all the compartments so that the air conditions and circulation in the other closed compartments are not interfered with. When the rolling shutter f is pushed up, connecting links p-p close the flap valve o in the air supply branch m of that compartment so that air cannot pass through the louvres n to the opened compartment. The atmosphere in each compartment is sucked out through openings k into a common suction duct i, while warm air is supplied from a common duct h to the branch m of each compartment. The partitions d stop short of the full height of the structure making the space r above common to all the compartments. The rolling shutter or door may be counterbalanced to facilitate lifting.
Patent GB-697169-A (GB)
Title: Improvements in or relating to front forks of cycles and motor cycles
Inventor: HOPWOOD HERBERT
IPC: B62K25/08
Filed: 1950-03-14
Abstract: 697,169. Spring forks for cycles and motor-cycles. BIRMINGHAM SMALL ARMS CO., Ltd. May 31, 1951 [March 14, 1950], No. 6318/50. Class 136 (iii) A fork for cycles and motor-cycles has a pair of upper tubular members 1, 3 formed from a single piece of straight tube bent through 180 degrees, a steering stem 5 being rigidly secured to the members 1, 3 and a pair of road wheel supporting tubular members 7, 9 mounted for telescopic movement within the members 1, 3 against the action of a resilient member 19. The member 19 may be a rubber tube or a coiled spring. The steering stem 5 may be formed with two oppositely disposed holes through which the fork member 1, 3 passes and in which it is welded or brazed. Alternatively, the lower end of the stem 5 may be formed with a semi-circular recess.
Patent GB-907363-A (GB)
Title: Improvements in or relating to the cure of unsaturated polyester compositions
Inventor: ALLAN LESLIE HAROLD
IPC: C08F283/01
Filed: 1960-02-23
Abstract: A catalytic accelerator for curing unsaturated polyester resins comprises a vanadium compound in a liquid acid phosphate ester. Preferred vanadium compounds are vanadium naphthenate, vanadium pentoxide and ammonium vanadate.  The acid phosphate esters used may have the formula where R1 represents an alkyl or aryl group and R2 represents an alkyl or aryl group or hydrogen, e.g. dibutyl hydrogen phosphate, diethyl hydrogen phosphate, di-isoctyl hydrogen phosphate, dimethyl hydrogen phosphate and di-nonylhydrogen phosphate. Additionally the catalyst system may contain a peroxidic compound, ethyl acetate, toluene and/or a cobalt compound.  Comparative examples are given.ALSO:A process for curing a composition containing an unsaturated polyester comprises mixing the composition with a catalyst system including an organic peroxide compound and a solution of a vanadium compound in a liquid acid phosphate ester.  The unsaturated polyester may be obtained by esterifying saturated dihydric alcohols, e.g. ethylene glycol, diethylene glycol, triethylene glycol, trimethylene glycol, a -propylene glycol and 1,3 butylene glycol with unsaturated dicarboxylic acids, e.g. maleic, fumaric, itaconic and citraconic acids.  Such esters may be modified by replacement of some of the unsaturated dibasic acids with an equivalent quantity of another dicarboxylic acid, e.g. succinic, adipic, sebacic, phthalic, azelaic, tetrahydrophthalic, endomethylene tetrahydrophthalic or hexachloroendomethylene tetrahydrophthalic acids.  Preferably the polyester is cured in the presence of an unsaturated monomer capable of copolymerizing with the unsaturated polyester, e.g. triallyl phosphate, styrene, methyl methacrylate, ethylene glycol, dimethacrylate, ethyl acrylate, acrylonitrile, vinyl acetate, diallyl phthalate, diallyl maleate, triallyl cyanurate and the vinyl phenols.  Examples of peroxidic compounds used in curing polyester resins are methyl ethyl ketone peroxide, cyclohexanone peroxide, tertiary butyl hydroperoxide, methyl isobutyl ketone peroxide and cumene hydroperoxide.  The source of vanadium compound may be vanadium naphthenate, ammonium vanadate or vanadium pentoxide all of which are soluble in acid phosphate ester solutions.  The liquid acid phosphate esters used may be represented by the formula <FORM:0907363/IV(a)/1> where R1 represents an alkyl or aryl group and R2 represents an alkyl or aryl group or hydrogen, e.g. dibutyl hydrogen phosphate, diethyl hydrogen phosphate, di-isooctyl hydrogen phosphate, di-methyl hydrogen phosphate and dinonyl hydrogen phosphate.  Additionally the catalyst system may contain ethyl acetate or toluene.  Comparative examples are given.
Patent GB-647514-A (GB)
Title: Improvements in or relating to the cylinder heads of air-cooled internal combustion engines
IPC: F02B19/14
Filed: 1948-03-01
Abstract: 647,514. Cylinders. POBJOY, E. E., (Representative of POBJOY, D. R.). March 1, 1948, No. 6384. [Classes 7(ii) and 7(iii)] An un-cooled insert 7 of heat-resistant material e.g. iron or steel, containing a valve seat, is screwed into an air-cooled cylinder head 4 of good heat-conducting material, e.g. a copper alloy such as aluminium bronze. The insert which has substantially less thickness than the finned head, carries an exhaust valve 3 in the twostroke oil engine shown, a hole 10 being provided for the fuel injector.
Patent GB-577714-A (GB)
Title: Improvements in or relating to thermostatic metals
IPC: G01K5/66
Filed: 1944-04-06
Abstract: 577,714. Thermostats. MALLORY METALLURGICAL PRODUCTS, Ltd. April 6, 1944, No. 6428. Convention date, April 10, 1943. [Class 64 (ii)] [Also in Groups II, XXII and XXXVII] A bimetallic element for thermostats con. sists of a strip of low expansion metal, e.g., that known under the registered Trade Mark " Invar," and a strip of high expansion silver alloy containing, e.g., 0.1- 10 per cent. of nickel. 2-35 per cent. of copper ; and the balance of silver. The low-expansion metal may be a 42 per cent. nickel steel; or an alloy of, e.g., 28 per cent nickel, 18 per cent. cobalt and 54 per cent. iron ; 31 per cent. nickel, 5 per cent. cobalt and 64 per cent. iron ; or 8 per cent. chromium, 30 per cent. nickel, 25 per cent. cobalt and 37 per cent. iron. The high expansion alloy may consist of 2 per cent. nickel, 21 per cent. copper, and 77 per cent. silver. A small percentage of zinc, tin, beryllium, antimony, aluminium, cadmium, magnesium, indium, manganese, silicon or iron may be added in place of a corresponding percentage of silver. The percentage of zinc or tin may be from 3 to 5, and of indium, manganese, silicon or iron from 0.05- 5. Beryllium is stated to be most beneficial from 0.25-1.5 per cent. where the copper content is from 20- 30 per cent., and aluminium from 1.5- 5 per cent. where the copper content is from 2- 5 per cent. The bimetallic element may be made by passing the low expansion strip through a furnace together with the silver alloy strip. The latter strip is fused and passes with the other strip into a cooling zone where the silver alloy solidifies and the compound strip may then be cold rolled. In a modification, the silver alloy strip may be formed on the low-expansion strip by electron depositions. The strips may be made from metallic powders. Thus, the high expansion strip may be made by mixing silver, copper and nickel powders and pressing, sintering and working them, the strip being bonded to the low expansion strip and the two rolled together to the required dimensions. The silver alloy strip 21, Fig. 3, and the strip 23 of low-expansion alloy may be passed through furnaces 22, 24 respectively and bonded together by a strip 27 of, e.g., silver solder, the bond being, effected by rollers 25, 26. In another arrangement, the strips are preheated in a reducing atmosphere, preferably in independe it furnaces, so that they can be heated to different temperatures, and bonded together by passing between pressure rollers. A ternary element may be formed by interposing a strip of brass, cadmium, copper, phosphor bronze, silicon bronze or a copper alloy, such as copper or silver brazing material, between the high and the low expansion strips. A thermal switch may comprise a low expansion strip 10, Fig. 1, bonded to a high expansion silver alloy strip 11, the compound strip being secured to a metal bar 12 carrying an electric contact 15.
Patent GB-418739-A (GB)
Title: Improved apparatus for punching record cards or fare tickets
Filed: 1933-06-06
Abstract: 418,739. Punching record cards or tickets. WATSON, A. F., 49, Queen Street, and SCOTTISH MOTOR TRACTION CO., Ltd., East Fountainbridge, both in Edinburgh. June 6, 1933, No. 6453. [Class 106 (iii).] In apparatus adapted to perforate record cards or fare tickets at variable selected points so that the data thus recorded may be computed or tabulated by passing the tickets through statistical machines, key-operated mechanism punches both portions of a folded card or ticket, and the two portions are separated and severed so that one may be diverted into - a magazine and the other issued. In the application to a fare ticket punching machine, Figs. 4 and 5, the folded ticket moves in a recess 2 towards the right under a transverse row of punches 10, the open ends being separated by the knife edge 48<a> of the cover plate 48 so that the lower part may be fed into the magazine 45 while the upper part may be removed from the top of the plate, after the folded end has been cut off by the knife 51, the cuttings being collected in the compartment 46. The front edge of the upper part of the ticket abuts against stops 49 on a transverse bar 9 which is connected at one end to a rack 6 guided longitudinally of the machine and at the other end to indicator bar 7 slidable in a boxlike guide 8, the marking on the bar being viewed through an opening 63 in the guide. The ticket is pulled forward by the bar 9 by means of a spring controlled pin 50 engaging a hole in the leading edge. The bar 9 is urged towards the right by a cord 39 passing over a pulley and connected to a spring 41, but it is allowed only a step-by-step movement under the control of pawls 29, 30, Fig. 6, engaging the rack 6, except when the knife 51 is operated by a side lever, the first part of the movement of the lever releasing the bars 9 and rack 6 so that the spring 41 moves them quickly to the end position ready for cutting. The punches 10 are raised by springs 22 and each is depressed by its key 12, the depression of any key operating a cross bar 24 carried by arms pivoted on a shaft 25, and operating the pawls 29, 30 so as to allow the bars 6, 9 and the ticket to move forward one step. For this purpose the pawls are raised and lowered alternately by connections to a lever with arms 26, 32, 36, 37 also mounted on shaft 25 ; but when the cutting lever is operated the first part of the movement rotates a shaft 56, thereby adjusting a block 59 longitudinally, so as to raise the pawl 29 without lowering the pawl 30, the bars 6, 9 and ticket being thus moved quickly to the cutting position. A space key 12<a> enables the bar 9 and rack 6 to be fed forward without operating a punch.
Patent GB-555167-A (GB)
Title: Colour television apparatus
IPC: H04N9/31
Filed: 1942-05-13
Abstract: 555,167. Three-colour optical systems. BAIRD, J. L. May 13, 1942, No. 6453. [Class 97 (i)] [Also in Group XL] For producing tele vision pictures in colour an optical system is used comprising lenses D, E F, Fig. 1, side by side one for each primary colour, having their foci at the corresponding primary images A, B, C, and a lens G having its focus on a screen H and adapted to converge the parallel beams from the lenses D, E, F so that the projections of the primary images A, B, C are overlapped on the screen F. The colours may be produced by filters L, M, N. An additional lens may be used between the lenses D, E, F and the primary images A, B, C when these pictures are small. The optical system may be used in the reverse direction in transmitters. The transmitter may be one using a scanning light spot producing separate fields in different colours by light filters or coloured powders in the cathode ray tube. Or, the transmitter may be of the flood lighting type producing separate images through coloured filters on a photo-sensitive surface.
Patent GB-536713-A (GB)
Title: Improved method for coal dressing
IPC: C10L9/02
Filed: 1940-04-12
Abstract: 536,713. Preparing fuel; materials for making coke. BIESEL, P. April 12, 1940, No. 6638. [Classes 50 and 55 (ii)] A pure coal suitable after coking for electrodes is obtained by treating dressed finely granulated coal of low ash content (e.g. 1 per cent.) with a solution of boiling dilute inorganic acid for example one part each of hydro-fluoric acid and hydrochloric acid and three hundred parts of water. Alternatively with the same proportion of water one part each of fluoric and nitric acids may be used. 100 kilos of coal require 150 litres of the dilute acid, the process being carried out in acid proof tanks, and the liquid being heated and agitated by injecting super-heated steam through a perforated coiled pipe. The treated coal is subsequently washed free from acid.
Patent GB-590233-A (GB)
Title: Improvements relating to pyrophoric lighters
IPC: F23Q2/08
Filed: 1945-03-16
Abstract: 590,233. Pyrophoric lighter-wick caps. LOWENTHAL, J., and BISHTON, A. H. March 16, 1945, No. 6721. [Class 75 (iii)] In a pyrophoric lighter of small cross-section with a wick cap 12 which is pivotally mounted on a spindle 5 carrying the friction wheel 6 and provided with a projection or milled edge so that the wick can be raised when the wheel is rotated, the cap 12 is diecast in one piece. The cap 12 is formed with two projections mounted outside the limbs of a U-shaped member which supports the spindle 5, a spring washer or the like being inserted on one side to prevent slipping. The fuel chamber 1 containing absorbent material is closed by a removable cap 2 which is secured by a bayonet fitting.
Patent GB-107570-A (GB)
Title: Improvements in Rolling Mills.
IPC: B21B35/12
Filed: 1917-05-12
Abstract: 107,570. Shillito, B. J., and Wallwork & Co., H. May 12, 1917. Rolling.-A reversing-gear for a rolling-mill consists of a pair of geared pinions each, or one only, of which drives a roll and each of which can be put in gear with a main driving-pinion. In the arrangement shown in Fig. 1, each of the geared pinions d, e drives a roll through ordinary means and the ends of their shafts f, g are carried in a pair of end blocks q having bearing surfaces fitting surfaces n, o, p, on the housing. By means of a hand-wheel and worm-and-rack gear t, s, the blocks can be turned to put one or other of the pinions in gear with the driving-pinion a. In a modification, not shown or described in detail, the pinion a may be moved to gear with either of the pinions d, e.
Patent GB-905652-A (GB)
Title: Multi-channel voltage comparators
Inventor: RALPHS JOHN DENNIS
IPC: G01R19/00
Filed: 1960-02-26
Abstract: 905,652. Apparatus for selecting the largest or smallest of a number of input voltages. NATIONAL RESEARCH DEVELOPMENT CORPORATION. Feb. 23, 1961 [Feb. 26, 1960], No. 6805/60. Class 37. [Also in Group XL (c)] A multi-channel voltage comparator indicates which of a number of input voltages is the largest or smallest. The comparator includes a ramp voltage Vs generator providing the comparison voltage Vs and consisting of a transistor Xs rendered operative when switch S is opened. The voltage inputs Va, Vb, Vc are applied at Ra, Rb, Rc. Assuming that Va is the most negative of the input voltages, the operation is as follows (see also Fig. 2). Switch S is opened and the collector current Is (Fig. 2a) through Xs will rise, causing the negative collector voltage Vs (Fig. 2b) to fall. When Vs=Va, diode Da will become conducting causing a decrease in the rate of fall of Vs. A voltage Vo (Fig. 2c) will also be generated between the emitter and base of a transistor Xa causing it to draw collector current Ic (Fig. 2f) from a capacitor C2 which discharges via the primary of a transformer T2a, and causes an output pulse from the secondary winding of T2a (Fig. 2 (h)). After capacitor C2 has discharged, the current through transistor Xa is limited by resistor R3. If Vb is the next most negative voltage, diode Db will conduct next when V6=Vs, resulting in a further rate of charge of Vs and also in the application of a voltage Vo/2 (Fig. 2 (d)) between the base and emitter of transistor Xb to make it conduct. C2, however, is almost fully discharged, and the current drawn by Xb will be too small to result in an output pulse on the secondary of T2b. There will similarly be no output when Xc becomes conducting. When Vs has reached earth voltage, the collector of Xs is charged by D1, Ca, Cb, Cc are discharged, Xa, Xb, Xc are cut off and switch S is closed to discharge Cs, and the operation is then repeated. In order to avoid errors due to leakage currents a modified circuit is described (Fig. 3, not shown). The comparator may be used in frequency shift keying telegraphic receiving apparatus in which each character is received as a separate tone. The outputs of tuned amplifiers used in such apparatus (for example, as described in Specification 854,201) may be rectified and applied to separate resistors Ra, Rb and, when a tone is received, the diode connected to the output of the respective tuned amplifier will conduct first and the corresponding character will be indicated at the appropriate transformer secondary.
Patent GB-691972-A (GB)
Title: Improvements in or relating to aircraft provided with electric systems including crash or impact detecting devices
IPC: A62C3/08
Filed: 1950-03-20
Abstract: 691,972. Fire-extinguishing. GRAVINER MANUFACTURING CO., Ltd., MATHISEN, A., and WILKINSON SWORD CO., Ltd. March 1, 1951 [March 20, 1950; May 23, 1950; July 21, 1950; Jan. 16, 1951], Nos. 6832/50, 12866/50, 18250/50, and 1161/51. Class 47(ii) In a system for extinguishing or preventing fires in crashed aircraft in which impact detectors are provided on or adjacent the skin of the aircraft to close a circuit through the coil of an electro-magnetic relay to operate fire-extinguishers, a condenser is connected across the relay coil to ensure a sufficiently long energization thereof to operate the extinguishers. In one construction, Fig. 1, the impact detector comprises a wedge-sectioned contact member c embedded in resilient insulating material a and arranged in circuit with the coil 3 of an electro-magnetic relay 2, a battery 5 and the aircraft skin b. When the contact c is forced into engagement with the skin b, the circuit is closed to energize the relay and charge the condenser 4 which continues to energize the relay if the circuit is broken. The relay closes a switch 6 to operate extinguishers d\ d<SP>2</SP> and a switch 7 to maintain the current in the relay through an auxiliary circuit. In a modification, the impact detector, Fig. 5, comprises metal strips g, h housed in an insulating member e and normally spaced apart by insulating strips i provided with resilient projections j. The circuit is independent of the aircraft skin b. In another arrangement, Fig. 3, employing the detector shown in Fig. 5, the electromagnetic relay R comprises' two windings r<SP>1</SP>, r<SP>2</SP> and a single contact r<SP>3</SP> which closes the circuit of a heavy current relay P controlling a contact p<SP>1</SP> in the circuit of the extinguishers d\ d<SP>2</SP>. A rectifier C prevents discharge of the condenser 4 to earth, if earthing occurs at b<SP>1</SP> or b<SP>2</SP>, and a low resistance 10 prevents the blowing of a fuse 9 before the condenser is charged. Specifications 613,343, 640,796 and 692,015, [Group XXXVII], are referred to.
Patent GB-612435-A (GB)
Title: Television synchronising signal separator
IPC: H04N5/08
Filed: 1946-03-05
Abstract: 612,435. Television. FARNSWORTH TELEVISION & RADIO CORPORATION. March 5, 1946, No. 6876. Convention date, March .14, 1945. [Class 40 (iii)] [Also in Group XL (c)] Apparatus for recovering the synchronizing signal component from a carrier wave modulated in amplitude by a composite television signal comprises a circuit including a three-electrode thermionic valve, means for impressing said modulated carrier wave upon an input circuit thereof, means including a regenerative feedback circuit connected between said input circuit and an output circuit for effecting an amplitude discrimination in the output circuit and means including a circuit having a maximum impedance at the frequency of said carrier wave for supplying space current to said thermionic valve. As shown in the drawing, the composite signal output of an intermediate carrier frequency amplifier 1 is inductively coupled to a resonant circuit 5, 6 which forms the input circuit of a three-electrode valve 7, the-cathode resistor 8 of which is shunted by a parallel circuit 9, 11 sharply tuned for resonance at the frequency of the carrier wave, a second parallel resonant circuit 14, 15,. also tuned to the carrier frequency, being connected between the anode of the valve 7 and the battery 13. The operation of the circuit is as follows: The valve 7 is biassed such that it conducts only during the peaks of the positive half-cycles of the carrier, which extend into the " blacker-than-black " region, and the regenerative effect of the circuit 14, 15 and the resistor 12 is made greater than the degenerative effect of the circuit 9, 11, so that when a signal extending into the " blackerthan-black " region (i.e. in the direction of the synchronizing signals) is impressed on the input circuit, the valve conducts and supplies an amplified " pulse of carrier " (i.e. a synchronizing pulse), whilst when the level of the input signals falls below the mean black level, the valve ceases to conduct. The advantages claimed for the arrangement are that it functions independently of signal strengths and/or D.C. level and that it amplifies the synchronizing signal component non-linearly without having first to demodulate the carrier wave upon which the composite signal is amplitude modulated. Specification 592,581 is referred to.