baber/WOPTO huggingface dataset:
Patent GB-608467-A (GB)
Title: Improvements in or relating to the demodulation of time-phase modulated electric pulses
IPC: H03K9/04
Filed: 1946-02-25
Abstract: 608,467. Pulse modulation. STANDARD TELEPHONES & CABLES, Ltd., CHATTERJEA, P. K., and BENEY, J. K. Feb. 25, 1946, No. 5792. [Class 40 (v)] For demodulating a time-modulated pulse train, a resonant circuit tuned to a frequency substantially equal to the unmodulated pulse recurrence frequency is associated with an amplifier to generate sustained oscillations, and the pulses are applied to the resonant circuit to modulate the oscillations which are then demodulated. As shown, oscillations are sustained in the tuned anode circuit 16, 17, 18, by the back coupled valve 19 and the circuit of the grid coil 23 includes the load resistance 24 of a cathode-follower pulse amplifier 1. The resonant circuit is tuned to the unmodulated pulse recurrence frequency and the oscillations are locked in phase to the phase of the input pulses. The resulting phase-modulated oscillations are demodulated by a known phasedemodulator circuit 26. In some circumstances sufficient amplitude modulation of the generated oscillations is produced to enable a simple amplitude demodulator to be used.
Patent GB-417925-A (GB)
Title: Improvements in or relating to the production of cutting blades or knives
IPC: B24B3/36
Filed: 1934-03-24
Abstract: 417,925. Grinding cutlery and the like. GREEN, W., 105, Edward Street, Sheffield. March 24, 1934, No. 5858/33. [Class 60.] The invention relates to a machine for grinding plane surfaces, such as those indicated at O1, Fig. 5, on knife-blade blanks, a straightline cutting-edge being formed at the intersection of the plane surfaces, which may extend over the whole or a part only of the side face of the blade. The machine comprises a bed A on which are mounted a head-stock B which carries the grinding-wheel B3 and is adjustable in height and inclination, together with a workholder for the blank K, which is adjustable to allow of variation as regards height and inclination in relation to the bed A of the plane surface produced on the blank, and is provided with means for giving it simple or compound linear movements. The headstock B is in the machine shown supported on screwed spindles A3 carried in apertured lugs A2 on the bed and simultaneously rotated by gears A7, A8 to raise and lower the headstock B, into which they are screwed. Limited variation of the inclination of the headstock B may be obtained by adjustment of lock-nuts A5. The workholder comprises a base D, supported at adjustable height, inclination, and distance from the headstock by three screwed bolts C pivotally attached to it and passing through slots in the bed A. A member E is slidably mounted on the base D, and may be reciprocated manually or through a connecting-rod F2 and crank-pin F on a shaft F1 which may be driven by a flexible shaft from the spindle of the grinding wheel. The member E carries a slideway G which is angularly adjustable about a pin H3 and in which is mounted a cross-slide H. The blank holder J is pivoted at H2 to the crossslide H, the blank K being held on it by a pivoted clamp L, secured by a bolt L2 and lever nut L3. Alternatively, the holder J may be of the magnetic type. The grinding wheel may be conical, as shown, or cylindrical. In a modification, the blanks are held magnetically or by clamps in recesses in the upper face of a rotary table and are operated on by the under face of a grinding wheel rotating on an approximately vertical axis, the table being reciprocated similarly to the holder J, and rotated to bring successive blanks into position for grinding.
Patent GB-306826-A (GB)
Title: Improvements in or relating to electric current transformers
IPC: H01F27/42
Filed: 1929-02-22
Abstract: 306,826. Siemens - Schuckertwerke Akt.-Ges. Feb. 25, 1928, [Convention date]. Void [Published under Se'ct. 91 of the Acts]. Current transformers are caused to operate on a desired part of the magnetization curve by the use of a premagnetizing winding energized by current supplied from an auxiliary transformer, the primary winding of which is in series with the primary of the main transformer and having its core so dimensioned that saturation is reached at low load so that the pre-magnetizing current is not greatly affected by load variations. The core of the current transformer is divided into parts 1, 2 both embraced by the primary and secondary windings 3, 4. The primary also embraces the core of the auxiliary transformer 8, the secondary 7 of which is connected to premagnetizing windings 5, 6 which are oppositely wound on the two main cores so that they " do not disturb the equilibrium of the primary and secondary ampere windings."
Patent GB-562971-A (GB)
Title: Improvements in or relating to packing washers
IPC: F16B43/00
Filed: 1943-04-15
Abstract: 562,971. Joint - making patching. PAYEN, Ltd., J., and PAYEN, E. April 15, 1943, No. 6047. [Class 122 (iii)] A packing washer for bolts &c. has an inwardly 'directed flange d, split at e and deformed to engage the threads of the bolt &c. The washer may be of asbestos a enclosed in one or two copper rings b, c of U section. Where one casing is used the U may be directed inwardly or outwardly.
Patent GB-355693-A (GB)
Title: Manufacture of intermediates and dyes from heterocyclic nitrogen compounds
IPC: C09B23/00
Filed: 1930-02-24
Abstract: Intermediates for polymethine dyes are obtained by condensing, in equimolecular proportions, heterocyclic nitrogen compounds containing reactive methyl groups or external reactive methylene groups with compounds of the general formula X = (CH)2n + 1 Y, where X is a substituted imino group and Y an arylamino group. Polymethine dyes are obtained by using two molecular proportions of the heterocyclic nitrogen compounds, or by condensing the intermediate products with a molecular proportion of a heterocyclic nitrogen compound as defined above or of a cyclic compound which contains an intracyclic reactive methylene group (e.g. a pyrazolone) or which reacts tautomerically as though such a group were present (e.g. an indole not substituted in the b -position).  The dyes may be used for sensitizing photographic emulsions to light of long wavelength.  In examples (1) 5 - anilino - 1 - phenylimino - D  2 : 4 - pentadiene hydrochloride is condensed with 1 : 3 : 3-trimethyl-2-methyleneindoline (2 mols.) in the presence of acetic anhydride; the product dyes tannined cotton bright green shades, and when applied in aqueous alcoholic solution to a photographic plate sensitizes the latter in the region of 750-900 m m ; (2) b -anilinoacroleinanil is condensed with 2 : 3 : 3-trimethylindolenine methiodide or with 2-methyl-benzthiazole ethiodide in equimolecular proportions, and the products are further condensed with molecular proportions of 2-methylbenzthiazole ethiodide or 2 : 3 : 3-trimethylindolenine methiodide in the presence of acetic anhydride; the resulting dye dyes tannined cotton a bright greenish-blue; (3) the intermediate product from b -anilinoacroleinanil and 2 : 3 : 3-trimethylindolenine methiodide is further condensed with a -methylindole; the product dyes tannined cotton a lavender blue shade, and (4) 1 : 3 : 3-trimethyl-2-methyleneindoline is condensed with b -anilinoacroleinanil (molecular proportions) in the presence of acetic anhydride.
Patent GB-329697-A (GB)
Title: Fuel injecting apparatus for starting internal-combustion engines
IPC: F02N99/00
Filed: 1929-02-25
Abstract: 329,697. Larsen, I. Feb. 25, 1929. Starting.-In a device for injecting a fuel and air mixture into the induction pipe, comprising coaxial fuel-pump and air-pump pistons 1, 2 moving in a cylinder of two diameters, the piston. 1 is displaceable axially in relation to the piston 2. In one form, Fig. 2, the pistons are resiliently connected, the end of the piston 1 moving in a sleeve 17 on the piston 2 against a spring 18, so that fuel is not expelled from the nozzle 16 before the air pressure has overcome the resistance of the outlet valve of the air pump. In a modification, the piston 1 is adjustably screwed into the piston 2. A heating element (not shown) may be provided in the connection between the device and the induction pipe.
Patent GB-540136-A (GB)
Title: Combined shaft bearing and coupling
IPC: H01C10/20
Filed: 1940-04-04
Abstract: 540,136. Combined shaft coupling and bearing; electric switches. DEHN, F. B. (Globe-Union, Inc.). April 4, 1940, No. 6107. [Class 80 (ii)] [Also in Group XXXVII] An instrument adjusting device comprises a shaft 16 rotatably coupled to a bearing bush 25 rotatable in a fixed bearing sleeve 17, the shaft 16 being detachably secured against axial movement by a springy projection 38. As shown, for a volume control device, the shaft 16 is formed from a flat strip of material and is slotted and bent to form two projections 38. The shaft passes through a slot 30, Fig. 2, formed in one end 27 of the bushing 25. The end 27 has a peripheral flange 28. and the other end has tabs 29 which pass through slots, similar to the slots 30, formed in an insulating disc and in a member 31, the ends of the tabs being bent over at 29<SP>1</SP>. The member 31 is a combined rotatable stop member and switch operator. A disc 15 carries a contact 14 adjustable around a conductive strip 13 applied to the inner wall of a casing 11, the latter, together with the bearing sleeve 17, being clamped to a supporting member 19. In a modification the flange 28 is slotted to receive shoulders 34 on the shaft 16 and the slot 30 is formed at the other end of the bushing 25. In another modification, a pair of volume control devices are mounted side-by-side on a shaft. In Fig. 16, the invention is applied to a step-by-step or all-wave switch. The stator 90 is fixed to a frame 92 carried by the bearing sleeve 98 and has clips 96. The rotor 93 carries contacts 97 which provide the required switching action and maintain the rotor and stator in the same plane. The extremity 120 of the shaft 95 engages a rectangular slot in the rotor for rotary adjustment thereof.
Patent GB-312594-A (GB)
Title: Improvements relating to respiratory gas masks or face pieces
IPC: A62B18/02
Filed: 1928-02-28
Abstract: 312,594. Jones, F. C. Feb. 28, 1928. Moulding indiarubber respirators -Face-pieces for respirators are formed by press moulding rubber or like material on a flat plate-like core between a pair of half moulds. The face-pieces, an interior perspective view of one of which is shown in Fig. 4, are of strong flexible rubber and comprise, (1) portions 2, 3 closely engaging the chin, cheeks and forehead and having tabs 13 for connection with head straps, (2) gogglelike eye-piece sockets 5 outstanding towards the upper and outer sides of the mask, (3) channels 7, 9 leading the inhaled air over the eye-pieces and thence to the nostrils, (4) annular sockets 11 to receive exhaling valves, and (5) a partition 10 engaging the upper lip and preventing direct access of air to the nostrils. The inhaled air is drawn through a tube 6 formed with a terminal bead 6a for connection with the respirator-box and the channels 7, 9 are stiffened by integral longitudinal ribs 8. The moulding apparatus shown in Figs. 5 and 6 produces a mask normally folded along the centre line of the face and comprises a pair of complemental moulds such as' 7 and a thin plate-like core 16 engaging a recess 15 therein. The core 16 is formed with cvlindrical projections 23 having beaded edges 25 co-operating with annular depressions 24 in the moulds to form the eyepieces, ribs 28, 29 having central depressions 30 forming with depressions 31, 32 in the moulds, the ribbed channels 8, 9, a U-shaped slot 36 forming the partition 10, and flat discs 19, having thin peripheral flanges 35, which co-operate with annular depressions 20 in the moulds to form the valve sockets 11. The inhaling tube 6 is formed by a cylindrical portion 21 on the core co-operating with similar depressions 33, formed with annular recesses 34, in the moulds. Shallow rulings 39 on the core form a roughened portion on the mask improving the contact thereof with the face. The core contacts with the moulds over its unformed portion and at the points 26, 20<a> and 22, Fig. 5. The moulds 17 are formed with cut-away portions 40 to facilitate handling and with channels 42 for the removal of gases during moulding. Two facepieces may be moulded simultaneously by making the moulds and the core double ended.
Patent GB-339890-A (GB)
Title: An improved method of and apparatus for determining the limiting creep stress of materials
IPC: G01N3/16
Filed: 1930-02-26
Abstract: 339,890. Colville & Sons, Ltd., D., Barr, W., and Bardgett, W. E. Feb. 26, 1930. Testing physical qualities of materials. -Comprises a method of determining the limiting creep stress which consists in subjecting a specimen at a selected temperature to a stress which is gradually decreased under the control of the specimen itself until a constant value is reached. The specimen s is mounted in alignment with bars 2, 7, W, 5 as shown in a frame 1. The screwed bar 2 passes through the frame and is feathered thereto to prevent turning. The " weigh-bar W " is of standard material and the stress corresponding to any strain thereof is known. The bar 5 passes through the lower end of the frame and has a part spherical bearing 5<a> which may be of a more elaborate character to ensure that any stress is applied axially of the assembly. The nut 4 is turned to apply a stress to the specimen above the estimation of the required stress and an electric furnace 8 surrounding the specimen is excited to the required temperature. Under the combined stress and heating the material of the specimen creeps and after a time the decreasing strain as measured by an extensometer attached to the bar W reaches a constant value. The corresponding stress is the value required.
Patent GB-432014-A (GB)
Title: Improvements in and relating to rotary piston machines and methods of manufacturing the same
IPC: F04C18/20
Filed: 1935-02-28
Abstract: 432,014. Milling rotary pump &c. pistons. ELWERT, O., 106, Rotebuhlstrasse, Stuttgart, Germany. Feb. 28, 1935, No. 6378. [Class 83 (iii)] [See also Group XXVI] A rotary engine, pump, or meter of the Roots' blower type comprises a piston b having plane edges h which roll on the periphery of a second piston c shaped as shown, the pistons being geared together. The ends of the piston b are curved and may roll on curved portions n of the second piston. In a modification, the portions n are dispensed with, and a clearance is provided between the pistons. The bevelled parts k of the piston b may be shaped as an ordinary tooth of a toothed wheel. Fig. 5 shows a method of machining the piston c. A milling cutter o rotates on its axis q, and the piston rotates around its axis d, and is also moved around the circle r. by means of a toothed wheel s, fixed on the spindle of the piston, meshing with a stationary toothed wheel t of the same size. A grinding disc, or a reciprocating plane, may replace the cutter. The cutting tool may roll around the piston, which would then remain stationary.
Patent GB-558011-A (GB)
Title: Improvements in or relating to the preparation of copolymers of cyclic imides of olefine dicarboxylic acids
IPC: C08F22/36
Filed: 1942-05-13
Abstract: 558,011. Resinous polymerization products. IMPERIAL CHEMICAL INDUSTRIES, Ltd. (Du Pont de Nemours & Co., E. I.). May 13, 1942, No. 6468. [Class 2 (iii)] Copolymers are made by heating a cyclic imide of an olefine dicarboxylic acid with a compound having a methylene group attached by a double bond to a carbon, all of whose remaining valencies not satisfied by hydrogen are satisfied by only singly bonded carbon. The cyclic imides may be those of maleic, citraconic, dimethylmaleic, benzylmaleic, phenylmaleic, itaconic, vinyl succinic, halogensubstituted maleic acids or their N-methyl-, - ethyl-, -propyl-, -n-butyl-, -isobutyl-, -cyclopentyl-, -cyclohexyl- or -benzyl derivatives. The olefinic compound may be ethylene, propylene, isobutylene, di-isobutylene (2, 4, 4- trimethylpentene-1), 1-butene, 1-pentene, 1- hexene, methylenecyclohexene, allyl formate, allyl amides, o-allyl phenyl acetate and ethyl N-allyl acetanilide. Polymerization may be carried out in mass, in solution in hydrocarbons, ketones, esters, dioxane, ether or chlorinated hydrocarbons, in emulsion or by the granular method described in Specification 427,494. A suitable catalyst is benzoyl peroxide. Instead of the pure imides, a mixture, for example, of N-substituted maleimide and maleamic acid formed by heating in vacuo equimolar quantities of maleic anhydride and an amine, may be used. The products may be used to form films, foils, fibres, mouldings, adhesives and coating or impregnating compositions for wood, textiles, leather, metals, glass, paper, stone and plaster. Plasticizers, pigments, dyes, and natural or synthetic resins may be added. Specification 505,120 also is referred to.
Patent GB-1409864-A (GB)
Title: Combined braking and trim correction device for a road vehicle
IPC: B60G17/04
Filed: 1973-02-09
Abstract: 1409864 Adjusting suspension height REGIE NATIONALE DES USINES RENAULT and AUTOMOBILES PEUGEOT 9 Feb 1973 [10 Feb 1972] 6572/73 Heading B7D [Also in Division F2] A trim correction device mounted in parallel with vehicle suspension springs R between the vehicle body and wheels corrects for static vehicle loading and comprises pneumatic telescopic units 1 which with increasing load pass higher pneumatic control pressures via conduits 5, 13, 12 to a device which acts on a brake pressure limiter located between a brake pressure source and the rear wheels for modifying the pressure passed therethrough, an electrovalve 22 being located between conduits 13, 12 to cut off the control pressure to override the dynamic vehicle loading changes due, for example, to vehicle deceleration. Increasing static loading is detected by a detector 23 which through a contact 25 fixed in the centre of an antiroll bar 26 operates a time delay control 24 and after the time delay operates a compressor 6 which being connected to pneumatic units 1 correct for trim; air also passes to the electrovalve 22 which is opened by the time delay signal. Pressure in a chamber 11 of the device controls the brake pressure limiter by acting on a diaphragm 7 thereby lifting a finger 8 co-operating with the brake pressure limiter piston, through a push-rod, the piston acting on the opening of a valve of the limiter. When the trim is corrected, the electric circuit opens, electrovalve 22 closes thereby isolating chamber 11 from the pneumatic units 1 and from pressure variations due to dynamic load changes. A lever 8b, Fig. 3 (not shown), articulated to the vehicle body coupled to a spring (21) acting between the lever and vehicle body maintains a constant minimum pressure on the pressure limiter valve through the push-rod to obtain a predetermined calibration of the pressure when the vehicle is empty.
Patent GB-772004-A (GB)
Title: Process for the production of ethers
IPC: C07C45/49
Filed: 1953-03-11
Abstract: Ethers are made by subjecting an organic compound containing olefinic unsaturation to the oxo synthesis, reacting the aldehyde so produced with an alcohol to yield an acetal, and eliminating from the acetal not substantially more than one mol. of alcohol per mol.  The unsaturated ether thus obtained is preferably subjected one or more times to one or more of the same sequence of three steps to yield ether aldehydes, ether alcohols, ether acetals and multiple ethers. Oxo synthesis stages other than the first are preferably effected in the absence of water. Acetalization may be effected by treatment of an aldehyde with an alcohol at a preferred pH of 1-6 and the alcohols used may be obtained by hydrogenation of any of the aldehydes produced in an oxo stage.  Alternatively, the oxo stage may be performed so as to yield alcohols as well as aldehydes, e.g. by operating at about 180-200 DEG  C. and with gases which are rich in CO, and acetalization of the products is then effected in the usual way. Alcohols are removed from the acetals by thermal splitting, advantageously in the presence of a dehydrating agent, especially phosphorus pentoxide.  The final products may be hydrogenated to saturated ethers or polymerized and the final ether aldehyde products may be converted into various derivatives by such processes as those of reduction, oxidation, oximation, amination, acetalization or aldolization.  In the last stage addition of water gas may be replaced by addition of aldehydes such as formaldehyde, olefinic ether alcohols being obtained.  In an Example, a C6 olefinic fraction is subjected to the oxo synthesis to yield C7 aldehydes which are hydrogenated and combined with first stage C7 alcohols to yield an alcoholic mixture which is used to acetalize the aldehydes, the acetals thus formed being converted to unsaturated ethers and alcohols which are separated and the ethers either treated with water gas in an oxo stage and hydrogenated to yield an ether alcohol containing 15 carbon atoms per molecule or subjected to the original three stages to yield an unsaturated ether containing two ether linkages.
Patent GB-830681-A (GB)
Title: Improvements in bookbinding machines
IPC: B42C19/08
Filed: 1956-03-02
Abstract: 830,681. Bookbinding machines. FRENCH, L. J. B. R. Feb. 13, 1957 [March 2, 1956], No. 6701/56. Class 16 A bookbinding machine comprises a pair of conveyer belts 1 which take the books back downwards to an auxiliary conveyer 2, moving at a higher linear speed, from which the books pass one by one on to a stacking head 4 which is movable laterally to allow each book to fall on its spine on to a stacking platform 40 and to move each book laterally out of the way of the next succeeding book. Delivery guides 3 maintain the books vertical and each book, as it passes on to the stacking head 4, depresses a trigger 5, pivoted at 6, to actuate a microswitch 7 and energize a solenoid 8 bringing into operation a single cycle clutch to move the stacking head to one side and then return it to its original position. The clutch 14 is driven from one of the pulleys 12 driving the belt 2 and carries a crankpin 23 joined by link 25 to a lever 27 pivoted at 28 and connected with one of a pair of parallel arms 29 pivoted at 30 to a projection 31 on the stacking head 4. On the return stroke of the head 4, a vertical part 32 of the head 4 engages the side of the dropped book on platform 40 and moves it past a spring pressed pawl 34 which projects through an opening 37 in the part 32 and the book is retained between the pawl 34 and a spring- loaded retaining arm 35 pivoted at 36. When a number of books have been stacked side by side, a projection 38 on arm 35 operates a microswitch 39 to sound an electric bell to warn the operator to remove the stack. The dropping of the books on to the platform squares the backs of the books. The stacking apparatus may be used in conjunction with an adhesive applying bookbinding machine as in Specification 728,221 with the glue tank, mounted in slidable runners, to be extracted at right angles to the conveyers and with two rollers used, the second of which may have a series of spiral flutes cut into its peripheral surface to rub the cut edges of the book slightly open to assist penetration of the glue. In certain types of glue, the stacking platform 40 may be of box form and heated electrically to assist drying. Specification 830,682 [Group XXVIII] also is referred to.