baber/WOPTO huggingface dataset:
Patent GB-670784-A (GB)
Title: Super-regenerative receiver
IPC: H03D11/06
Filed: 1949-01-28
Abstract: 670,784. Super-regenerative receivers; frequency modulation. RADIO CORPORATION OF AMERICA. Jan. 28, 1949 [Jan: 28, 1948], No. 2465/49. Class 40 (v). In a super-regenerative receiver for AM or FM signals the modulation output is derived by selecting and detecting a harmonic component of the quench frequency output. The selecting and detecting may be effected by an ordinary receiver in which case the superregenerator may be separate unit constituting a frequency converting unit or an FM/AM adaptor for AM receivers. The super-regenerative receiver shown comprises a resonant circuit 7 to which the signals are fed from coil 6 and which is connected to two valves coupled by a common cathode resistor 16 and a feedback capacitor 26 to form an oscillatory circuit. The same valves generate the quench frequency since they are reciprocally coupled by the cathode resistor and by a capacitor 44. The resulting quench currents are amplitude modulated by the modulation of the incoming signal and a harmonic of the quench frequency is selected and detected by a normal receiver 76, 80, 81. By detuning the input circuit 7 an incoming FM signal may be converted into an AM signal and the unit becomes an FM/AM adaptor. The circuit may be made selfquenching, Fig. 2 (not shown), by omitting the coupling through capacitor 44 and choosing valves of capacitor 13 and grid leak 71 to cause blocking. In this case the quench harmonic output is frequency modulated and the following receiver must be detuned to produce an amplitude modulated signal. Specification 593,361 is referred to. The Specification as open to inspection under Sect. 91 also describes a circuit in which the fundamental quench frequency is selected by the receiver and in which the quench frequency is developed in a separate pair of valves acting as a cathode coupled multivibrator and supplying a square quench wave to the grid of valve 20. This subject-matter does not appear in the Specification as accepted.
Patent GB-660046-A (GB)
Title: Firing pin safety for firearms
IPC: B25C1/04
Filed: 1949-01-28
Abstract: 660,046. Firearms. CZECH ARMS FACTORY, NATIONAL CORPORATION. Jan, 28, 1949. [Jan. 28, 1948] No. 2490/49. Class 119. The firing pin 1 is normally held at safety by a spring urged catch 7, which engages in a transverse notch 12 in the firing pin and whose vertical extension 7<SP>1</SP> extends into and beyond a recess 12<SP>1</SP> in the firing pin so that it can cooperate with the arm 4 of the sear 5 controlling the hammer 2. On pulling the trigger 13 an arm 15 on the trigger bar 14 moves a projection 16 on the sear to lift the latter, whereby the firing pin can move forwards unhindered when struck by the released hammer 2. After firing, the catch by first engaging with an incline 10 leading to the notch 12 draws the firing pin to the rear position shown.
Patent GB-854466-A (GB)
Title: New cyclopentanophenanthrene derivatives and processes for the production thereof
IPC: C07J75/00
Filed: 1957-01-23
Abstract: The invention comprises 2-alkyl or aralkyl pregnane derivatives of the general formula :  <FORM:0854466/IV(b)/1> in which R is an alkyl or aralkyl group, and R1 and R2 are hydrogen atoms, or hydroxyl or acyloxy groups, with the proviso that when R is alkyl and R2 is hydrogen, R1 is hydroxy or acyloxy, the acyloxy groups are preferably derived from hydrocarbon carboxylic acids containing less than twelve carbon atoms, e.g. acetic, propionic, cyclopentylproprionic and benzoic acids ; the invention also comprises a process for their preparation by treating the 20-ethylene ketals of D 4-pregnene-3, 20-dione, D 4-pregnen-17a -ol-3,20-dione, D 4-pregnen-21-ol-3,20- dione and D 4-pregnene-17a , 21-diol-3, 20-dione respectively with ethyl formate in the presence of sodium hydride to form the corresponding 2-hydroxymethylene derivatives, treating the latter with an alkyl or aralkyl iodide to form the corresponding 2-alkyl or aralkyl-2-formyl derivatives, eliminating carbon monoxide with the aid of a mild base, e.g. alumina, and then hydrolysing or eliminating carbon monoxide and hydrolysing in a single step with a mineral acid to yield the 2-alkyl or aralkyl D 4- pregnene compounds In examples : (1) the 20-mono-ethyleneketal of progesterone in benzene is treated with ethyl formate and sodium hydride under nitrogen yielding a sodium salt, which on acidification gives the 20-ethyleneketal of 2-hydroxymethylene-progesterone, which (2) is suspended with sodium hydride in benzene and then refluxed for 72 hours with methyl iodide giving the 20-ethyleneketal of 2-methyl-2-formyl-D 4-pregnene-3, 20-dione; this compound is passed through a column of alkaline activated alumina and the resulting 20-ethylene ketal of 2a -methyl-progesterone hydrolysed with aqueousmethanolic sulphuric acid to the free dione.  Other examples detail the preparation of 2a -ethyl, 2a -propyl- and 2a -benzylprogesterone, and the corresponding 17a -hydroxy-, 21-hydroxy-and 17, 21-dihydroxyprogesterone derivatives and esters thereof.  Reference has been directed by the Comptroller to Specification 803,777.
Patent GB-203982-A (GB)
Title: Improvements in or relating to governor mechanism
IPC: G05D13/00
Filed: 1923-01-27
Abstract: 203,982. Reid, Sir H., and MacLeod, J. Jan. 27, 1923. Centrifugal governors; fluid relays.-The throttle valve 31 of a high-speed engine is controlled by an oil-pressure-actuated piston 30 the supply to which is controlled by a valve 16 actuated by a governor mounted on the spindle 9 of a toothed-gear oil pump. Cup-shaped containers 11, 14 carrying guided balls or rollers 12 are mounted on an extension 5 of the spindle 9. The container 14 is movable axially against the resistance of a spring 17 holding the valve 16 in engagement therewith and separated therefrom by a ball bearing. Valve shoulders 20, 21 alternately put the sides of piston 30 in communication with a pressure-oil port 22 connected to the pump discharge and an outlet 25 or 26. The valve 31 is normally open and closes under excess speed. The valve 16 may be intermediate the cylinder 29 and the governor spindle and connected to a cross lever connecting the spindles of the governor and the valve.
Patent GB-367531-A (GB)
Title: Improvements in or relating to buckets or the like
IPC: A47J47/18
Filed: 1931-01-27
Abstract: 367,531. Buckets &c. CARTWRIGHT, F. E. and CARTWRIGHT, F. K., Corngreaves Works, Overend Road, Cradley Heath, Staffordshire. Jan. 27, 1931, No. 2619. [Classes 21 and 125 (iii).] The flanged dished cover 5, Fig. 2, of a metal bucket, can, drum, &c., is held in place by a band 9 of channelled section engaging over the cover flange and under the beaded or wired edge 4 of the vessel, the band being tightened by means of a screw bolt and nut mounted in the outstanding arms of lugs 11, 12, Fig. 3, provided near the overlapping ends. The lower part 10 of the band is preferably downwardly inclined as shown to impart a wedging action to the parts during closing, or this effect may be obtained by the cover flange being inclined downwardly and outwardly.
Patent GB-1082871-A (GB)
Title: Improvements in or relating to single-phase bridges with semiconductor cells and continuous voltage and current regulation
IPC: H02M7/155
Filed: 1965-01-21
Abstract: 1,082,871. Rectifying. CKD PRAHA, NARODNI PODNIK. Jan. 21, 1965 [Jan. 23, 1964], No. 2677/65. Heading H2F. A single-phase bridge has four basic arms 9, 10, 11, 12, each including a semi-conductor rectifier SR1, SR2, SR3, SR4. The arms 9, 10 are each split into two arms 5, 7 and 6, 8, having controlled semi-conductor rectifiers SCR1 . . . SCR4 which are connected in pairs to adjacent tappings (e.g. 1, 2), on transformer Tr via contacts K1 . . . K4. A further pair of uncontrolled rectifiers SR5, SR6 are also connected between points A, B and the lower of the two tappings to which the controlled rectifiers are connected (e.g. 1) by means of contacts k1 . . . k4. When changing tappings, contact K1 is first opened and K3 closed, and subsequently k1 opened and k2 closed, so that the controlled rectifiers are now connected between 2, 3, and the uncontrolled rectifiers are again connected to the lower of the two (i.e. 2).
Patent GB-887511-A (GB)
Title: Improvements in planing machines
IPC: B23D1/18
Filed: 1960-01-25
Abstract: 887,511. Planing. BOEHRINGER G.m.b.H. GEB. Jan. 25, 1960 [Feb. 9, 1959], No. 2680/61. Class 83 (3). [Also in Group XXIII] A planing machine comprises a table 12 movable on a bed 10, and standards 18, 19 and 20, 21 on opposite sides of the bed and carrying tools 16, 17 and 22, 23, respectively, arranged to cut rails 14, 15 clamped to the sides of the table in both the forward and reverse movements of the table. The cuttings pass through funnels 29, 30 on to a conveyer 31. Opposed pairs of standards 18, 20 and 19, 21 are interconnected by transverse girders 24, and abrasive discs 27, 28 are carried to smooth-off the rails before planing.
Patent GB-724403-A (GB)
Title: A combination of antennae
IPC: H01Q5/42
Filed: 1953-01-30
Abstract: 724,403. Aerials. STANDARD TELEPHONES & CABLES, Ltd. Jan. 30, 1953 [March 1, 1952], No. 2737/53. Class 40 (7). A combination of sound and television broadcast antennae for use in the ultra-short wave band comprises an array of dipole frame antennae 3 for the sound broadcast, and slot antennµ 2 for the television broadcast which also serves as a pole 1 for supporting the dipole frame antennae 3. Successive dipole frames 3 are arranged at intervals of approximately one wavelength and alternate with slot antennae 2 along the length of the supporting pole 1. This halves the constructional height of the two systems as compared with normal coaxial superposition and it is stated that the mutual radiation coupling between the two systems of antennµ is very small.
Patent GB-322388-A (GB)
Title: Improvements in or relating to clips for use in developing and handling photographic roll films and the like
IPC: G03D13/10
Filed: 1929-01-28
Abstract: 322,388. Kodak, Ltd., and Richardson, A. W. Jan. 28, 1929. Developing apparatus. -A clip for use in developing &c. processes for roll film is provided with a second pair of jaws for a reference card, and with shoulders enabling it to be supported on a pair of rods in the plane of the clip or at right angles thereto. The clip is formed of two parts A, B riveted at C, the parts being bent to form two pairs of jaws, the lower being provided with a guideway A<2> and stop C<1> to facilitate insertion' of the film. Shoulders E, F are provided for hanging the clip on parallel rods D<1>, E' or F<1>.
Patent GB-415481-A (GB)
Title: Improvements in and relating to motor vehicles and in lifting and moving devices therefor
IPC: B60S9/21
Filed: 1934-01-05
Abstract: 415,481. Jacking and manoeuvring motor vehicles. BERMAN, S., 29, Oxford Street, London. Jan. 5, 1934, No. 2856/33. [Class 79 (iii).] A motor vehicle equipped with a plurality of jacks whereby it may be raised bodily off the ground to be movable on transverse wheels in which the lower ends of the jacks terminate, is characterized in that means are provided for driving one or more of the jack wheels and also for steering the vehicle whilst so supported. In the form shown, four hydraulic jacks, clamped two to each axle, are operated by a pump h driven by an electric motor j, the wheels being mounted in forked extensions e<3>, f<3> of the jack plungers. The forks e<3> of the off side pair of jacks are formed with arms e<5> coupled by linkage p, p<1> to the ordinary steering means q on the vehicle, whilst the wheels of the near side pair of jacks are adapted to be driven from a pinion m on the propeller shaft c. For this purpose each near side jack wheel f<4> carries a toothed gear wheel f<5> in mesh with a worm f<6> on a shaft f<7> held in a bracket f<8> attached to the fork whilst its upper splined end passes through a pinion f<9> rotatably mounted in a bracket f<8a> attached to the jack casing f. The pinions f f<9> on the front and rear jacks mesh with worm or skew gears n<9> on a connecting shaft n<10>, the rear one of such skew gears n<9> also meshing with a pinion n<8> on a transverse shaft n<6> connected by skew gears n<4> to a lay shaft n carrying a pinion n<3> slidable into and out of mesh with the pinion m on the propeller shaft. The pinion n<3> is adapted automatically to be slid into and out of mesh with the pinion m as the jacks are lowered or raised by means of a double bell-crank linkage 0<2>, 0<3>, 0<4>, Fig. 8, co-operating with stop f<10>, f<11> on the jack fork f<3>. The stop f<10> may also be utilized to open a switch to stop the motor j when the jacks are fully extended. In place of the stop f<11> a spring may be provided to withdraw the pinion n<2> when the jacks are raised. Valves may be provided to enable the jacks to be operated individually for wheelchanging &c., whilst brakes may be provided on the jack wheels or on the shaft n<10>, or the ordinary car-brakes acting through the gear m &c. may be utilized to control the jack wheels.
Patent GB-178922-A (GB)
Title: Improvements relating to the grass-boxes of mowing machines
IPC: A01D43/063
Filed: 1921-01-22
Abstract: 178,922. Pugh, Ltd., C. H., and Bull, G. F. Jan. 22, 1921. Lawn-mowers.-The grass-box of a lawnmower has secured along the straight upper edge of each side a member 3 terminating near the end of the box in an outwardly bent portion 4. The forward ends of the members are bent round to form handles 5 for the box. The lawn-mower frame is provided on each side with a forwardlyprojecting triangular extension 1 having a recess 2 formed at its extreme end to take a trunnion 7 carried by a member 6 secured to the corresponding side of the grass-box. The outwardly bent portions 4 of the members 3 engage under the triangular extension 1.
Patent GB-1082222-A (GB)
Title: End closure for artificial sausage casings
IPC: A22C13/00
Filed: 1965-01-22
Abstract: 1,082,222. Cloing shirred tubes. TEEPAK Inc. Jan. 22, 1965 [April 1, 1964], No. 2899/65. Heading A2B. A shirred synthetic tubular casing is provided with an internal end douse by inverting and preferably twisting an open end of the casing within the casing. Fig. 4 shows one form, and Fig. 9 another form of the method according to the invention.
Patent GB-538846-A (GB)
Title: New organic nitrogen compounds and their application
IPC: D06M13/425
Filed: 1940-02-16
Abstract: 538,846. Quaternary ammonium compounds waterproofing and softening textiles. BALDWIN, A. W., HEY, D., ROGERS, M. A. T., and IMPERIAL CHEMICAL INDUSTRIES, Ltd. Feb. 16, 1940, No. 3001. Addition to 517,632. [Classes 2 (iii) and 15 (ii)] [Also in Group VIII] The halogenomethyl compounds used for reacting with aliphatic or heterocyclic amines for the production of the quaternary ammonium compounds described in the parent Specification are made by interacting a methylol compound of a carbamate of the formula RO-CO-NH 2  (R = an aliphatic radicle of at least 7 C. atoms) with a hydrogen halide or other halogenating agent, such as phosgene, thionyl chloride or phosphorus pentachloride, and if desired with formaldehyde or a polymer thereof, or with a dihalogenodimethyl ether, or by interacting a hydrohalide of the said carbamate with formaldehyde or a polymer thereof. In examples, methylol octadecyl carbamate is reacted with hydrogen chloride or phosgene and paraformaldehyde, or with dichlorodimethyl ether, and octadecyl carbamate is reacted with hydrogen chloride and paraformaldehyde ; in each case the products are reacted with pyridine to form the quaternary ammonium chloride. The products may be applied to textiles to render them soft and water-repellent, and if desired crease-resistant, by the processes described in the parent Specification.
Patent GB-555835-A (GB)
Title: Improvements relating to transformers for spark ignition apparatus
IPC: H01F38/12
Filed: 1942-03-07
Abstract: 555,835. Transformers. ROTAX, Ltd., and ALLEN, A. MASSEY-. March 7, 1942, No. 3011. [Class 38 (ii)] In an ignition transformer, particularly for use in a rarefied atmosphere, the risk of leakage discharges is reduced by enclosing at least the secondary winding c in a sealed glass envelope e one end g of which is of re-entrant form and surrounds the high tension terminal h. As shown the envelope e encloses the whole transformer, but in a modification, the primary winding b is arranged on the outside of the envelope. The connections b<SP>1</SP> to the primary winding are made sufficiently long to enable them to be sealed into the end of the envelope before the transformer is inserted therein from the other end, the re-entrant portion g being subsequently fused in position. The envelope may be filled with dried air or insulating oil and may be surrounded by a metal casing j.
Patent GB-548451-A (GB)
Title: Improvements in hydraulic mechanism for controlling the operation of agricultural and like implements
IPC: A01B63/10
Filed: 1941-03-06
Abstract: 548,451. Agricultural implements. BROWN TRACTORS, Ltd., D., and MERRITT, H. E. March 6, 1941. No. 3037. [Class 6 (i)] [Also in Group XXIX] A hydraulic mechanism for controlling the operations of ploughs, cultivators or the like drawn by tractor vehicles, or of bulldozers, scrapers and the like is constructed with a control valve g which governs the amount of liquid by-passed on its way from a pump f to a cylinder a in which is arranged a piston b connected by a link c to an arm don a shaft e which is connected by linkage to the tool. In the highest position of the tool the arm d is held by a spring-catch s engaging a sear d<SP>1</SP> on the arm d. The valve g is controlled by a spring-controlled rod g<SP>1</SP> connected to a floating link m<SP>1</SP> fitted with a roller n in engagement with a cam o operated by a handle p. The link m<SP>1</SP> is connected by a spring r to the arm d. By moving the arm p in the direction of the arrow p<SP>2</SP> the valve g is depressed and constricts the flow of liquid to the by-pass pipe h and the piston b rises until it finally reaches the position shown in dotted lines, and from this position it can drop to the position in which the catch s. holds the arm d due to the valve g reaching the full line position in which liquid can leave the cylinder a by a small by-pass m. The arm p is moved in the direction of the arrow p<SP>3</SP> to relieve the pressure on the piston b and to release the catch s. The lever p and cam o may be replaced by a bell-crank and link.
Patent GB-306080-A (GB)
Title: Process for the continuous fusing of bitumen to the condition for use
IPC: C10C3/12
Filed: 1929-01-30
Abstract: 306,080. Dumpel, R. Feb. 15, 1928, [Convention date]. Void [Published under Sect. 91 of the Acts]. Cauldrons.-Solid bitumen placed on a grid B in a hopper A is premelted by the volatile, gases escaping from the main container X through a passage F and chimney E. The container X is heated by a furnace G, the gases from which pass round a baffle M in a flue N leading to an uptake L having a control damper or valve K. An overflow pipe I and a draw-off cock J are provided, the latter being fitted with a gauge glass R which may contain a thermometer. The melting of the bitumen on the grid B is started by an oil burner D having a protecting hood C, the temperature being shown by a. thermometer H. The container X is covered with lagging S.
Patent GB-779208-A (GB)
Title: Improvements in or relating to treating wool
IPC: D06M13/52
Filed: 1955-02-03
Abstract: As an aid to felting, wool is treated with a beta-lactone in the presence of sufficient water to saturate the fibres, the lactone being present in an amount sufficient to provide a pick-up of at least 10 per cent, based on the weight of the untreated wool.  The lactone, which is preferably a water-soluble lactone having from 3 to 6 carbon atoms, may be of the general formula C(R)2C(R)2COO, where R is hydrogen or an aliphatic hydrocarbon radical.  Beta-propiolactone is mentioned.  The lactone may be applied to the wool in aqueous admixture by immersion or spraying or the wool may be saturated with water and subsequently treated with the lactone.  The lactone or aqueous-lactone admixture may be applied at temperatures from 0 DEG C. to 100 DEG C. and, if applied at temperatures below 60 DEG C., the wool is given a short heat treatment at 80 DEG C. to 100 DEG C.  In examples, carded batts are treated and are subsequently steamed, felted on each side, fulled with sulphuric acid, neutralized with ammonia, rinsed and dried.  Reclaimed and re-used wool stocks may be treated.  U.S.A. Specification 2,517,573 is referred to.
Patent GB-710862-A (GB)
Title: Improvements in or relating to gas-turbine plant
Inventor: GARDINER TERENCE EDWARD GOUVEN
IPC: F02C7/20
Filed: 1951-02-09
Abstract: 710,862. Gas turbine plant; centrifugal compressors. ROLLS-ROYCE, Ltd. May 8, 1952 [Feb. 9, 1951], No. 3257/51. Classes 110(1) and 110(3) In a' gas turbine plant comprising combustion equipment 14, Fig. 2, disposed axially between an axial-flow turbine 11 and a compressor 10 and wherein the turbine and compressor rotors are interconnected by a shaft 12 extending centrally of the combustion equipment, the compressor and turbine stationary structures are interconnected by an intermediate structure which is located radially between the shaft and the combustion equipment and comprises one or more sets of tubular struts or stays arranged in a zig-zag pattern. As shown in Fig. 1 the structure comprises struts 35-39 interconnected by rings 30, 31. 32, 41 and is made of aluminium. Extensions 39a are slidably spigoted in sockets 40 formed in the turbine stator structure 11b and supports the bearings 28,.29. The front bearing of the rotor assembly is supported by a tubular aluminium structure 23, 25. 26. 27 which is welded to the bearing housing 24 and to an annular structure 17. The engine accessory drive casing 51 is supported from the rings 23, 25 by struts 52. The compressor stator comprises inlet sections 10b with cascades 10c secured therein by stays 16, the sections 10b being interconnected by the members 17 which are bolted together. The diffuser vane assembly 15 is die cast in segments which are radially located in the members 17. The shaft 12 is formed in two parts interconnected by a universal coupling 13 and is protected by an aluminium sheet metal fairing 42 and a sheet metal member 43. Air is tapped off from the compressor at 44 and fed to the bearings and labyrinth packings through tubes 46 and the struts. The turbine rotor or a separate turbine rotor may drive an airscrew or the plant may constitute a turbo-jet unit.
Patent GB-231622-A (GB)
Title: Improvements relating to the mounting of motor-vehicle bodies upon their chassis
IPC: B60G99/00
Filed: 1924-02-09
Abstract: 231,622. Bradburn, W. H. Feb. 9, 1924. India-rubber and like springs for resiliently mounting a body on the chassis of a motor vehicle comprise a block a of india-rubber &c. seated between a pair of cupped bearers b<2>, b<3> and secured by an axial assembly bolt c, the bearers being of such form and size that they fit cap-wise on the ends of the block and leave a substantial clearance between their opposed edges, while the bolt c passes through a clearance hole a<1> in the block of substantially larger diameter than the bolt. The block is preferably spherical or has spheroidal ends. The plates b<6>, b<1> carrying the cupped bearers are secured to the body and chassis frames by bolts, the bolt c being preferably not used for this purpose.