baber/WOPTO huggingface dataset:
Patent GB-1194717-A (GB)
Title: Improvements in and relating to a Machine for Perforating a Stencil Electrically
Inventor: ZEUTHEN KARL GUSTAV
IPC: H04N1/407
Filed: 1967-06-02
Abstract: 1,194,717. Copying by scanning. ZEUTHEN & AAGAARD A.S. 2 June, 1967 [3 June, 1966], No. 25533/67. Heading H4F. The invention relates to an apparatus in which an original is scanned by a light source 9 in conjunction with a photo-electric cell 12 to produce a signal which is applied via a threshold circuit 14 to control a circuit 16 which applies a voltage to an electrode 8 whereby a recording blank 4 is perforated, the operation of the apparatus being such that circuit 14 is triggered only for grey values of the original exceeding a predetermined value. In accordance with the invention, automatic control of the relationship between the predetermined grey value and the threshold value of circuit 14 is achieved (so as to compensate for variations due to power supplies, ageing of light source 9 and photo-electric cell 12, fouling of optical elements and other factors) by arranging to scan periodically an element 18 having the predetermined grey value and using the resulting signal to adjust the relationship. As illustrated, element 18 comprises a strip extending across the width of the original whereby a signal corresponding to the predetermined value is provided at each revolution of the drum which supports the original and recording blank. An impulse is produced by an electromagnetic impulse generator 23, 24 in time coincidence with the signal and controls a circuit 20 which also responds to the output of circuit 14. Circuit 20 operates via an adjustment circuit 19 and either adjusts the threshold value of circuit 14 or the gain of an amplifier (not shown) through which the signal from photoelectric cell 12 passes to the threshold circuit. The adjusted relationship is maintained throughout the scanning of a line (i.e. one revolution of the drum) until element 18 is again scanned. Reference is made (without giving details) to an arrangement in which the adjustment is made for every other scanned line. A colour filter 25 may be introduced in the scanning light path for the purpose of modifying image contrast or for use in colour reproduction, the control system of the invention automatically compensating for the resulting change in the relationship between the predetermined grey value and the threshold value of circuit 14. In a second embodiment, Fig. 2 (not shown), the element of predetermined grey value comprises one of a number of elements of different grey values supported by a disc (40) which is rotatable manually to select a given element. A disc (36) carrying one or more mirrors (38) rotates at a speed related to the drum speed and periodically reflects the scanning light to the selected element of disc (40). Disc (36) may be omitted and the clamping bar (31) for the original made reflecting so as to reflect the scanning light to disc (40).
Patent GB-1162468-A (GB)
Title: Motor Vehicle.
IPC: B60K17/28
Filed: 1968-05-28
Abstract: 1,162,468. Tractor transmissions. LAWIMAHOLDING A.G. 28 May, 1968 [8 June, 1967], No. 25539/68. Heading B7H. In an agricultural tractor having an engine 13 connected to a P.T.O. shaft 18 and to transmission gearing 22 for driving rear wheels 12, clutch means connecting the engine 13 and transmission gearing 22 is arranged so that the maximum torque it is capable of transmitting is less than the maximum torque which may be applied thereto by the engine 13. It is thereby possible to employ without risk of overload damage a transmission of lighter construction than would otherwise be required. Dual clutch means 15 driven by the engine 13 includes a first clutch 17 connected to the P.T.O. shaft 18 and a second clutch 19 connected to a shaft 20 driving the transmission gearing 22. The clutch 19 may be constructed to transmit a maximum torque less than that of the engine or an additional overload slip clutch is incorporated in the shaft 20.
Patent GB-737655-A (GB)
Title: Improvements in motor vehicle bodies
Inventor: THOMPSON WILLIAM
IPC: B62D25/04
Filed: 1951-11-01
Abstract: 737,655. Vehicle bodies. MULLINERS, Ltd. Nov. 3, 1952 [Nov. 1, 1951], No. 25547/51. Class 108 (1). Body framework is constructed from pre-cast non-cored elements preferably of aluminiumsilicon alloy and comprises forward door pillars 2 connected by upper and lower windscreen rails 3 and 4 and supported on side-sills 5 which also support rear door pillars 6 and cant-rail sections 7, 8 and 9.
Patent GB-587215-A (GB)
Title: Improvements in and relating to the shaping and truing of grinding wheels
IPC: B24B53/08
Filed: 1944-12-20
Abstract: 587,215. Trueing grinding wheels. THURLEY, G. S., and BRITISH GEAR GRINDING & MANUFACTURING CO., Ltd. Dec. 20, 1944, No. 25581. [Class 60] A copying device for the forming and trueing of grinding wheels for precision gear grinding comprises a copying bar or spindle mounted on a fulcrum and disposed about an arbor or main spindle, which main spindle is arranged to be mounted on a gear grinding machine in axial alignment with and not between the work centres of the machine, so that trueing can take place without disturbance of the setting of the work between the centres ; and in -this device the ratio of reproduction for copying shapes from a master former is infinitely variable to an extent determined only. by the limits of the apparatus. A member c on a main-shaft a concentric with a tailstock b has a pair of parallel bars g which support, for universal movement, a copying arm d in a ball seating cup h ; while a member e, rotatable on or with the shaft a, carries a master former 2 on parallel bars k. The copying arm d comprises a diamond finger t, a ball u, a copying arm bar v and a straight edge w, all forming a straight line, parallel to the work-centres, with any chosen pitch point on the former. The edge w is formed with a V-slot in which a profiling pin x, Fig. 3, is held by a follower body y, having follower fingers 3 engaging an inner edge 4 of the former, so that the pin x co-operates with the master edge 1 to keep the diamond point always normal to the master involute path. For the correction or compensation of gear teeth, the involute curvature may be modified by axial adjustment of the support e to effect an alteration of the lever ratio, or by using a different part of the involute master former. The angle of obliquity may be modified by adjustment of a universally adj ustable segment s, to which the former is attached by slotted bars 9, 10; or by rotary adjustment of the member e about the axis of the arbor a. A handle 11 is provided for manipulating the apparatus. The former and copying arm may be tilted with respect to the arbor a if required.
Patent GB-532608-A (GB)
Title: Improvements in or relating to machines for cutting and wrapping frozen masses
IPC: F25C5/14
Filed: 1939-09-11
Abstract: 532,608. Sawing. KUSTNER FRERES & CIE. SOC. ANON. Sept. 11, 1939, No. 25589. Convention date, Sept. 9, 1938. [Class 145 (ii)] A sawing machine for a bar of frozen material includes a circular saw 1 recessed in a guard 2 and adapted to reciprocate in the direction of the plane of the saw above a conveying device 15 for the bar adapted to be displaced transversely of the saw. The shaft 10 of the saw 1 is mounted on an axis 3 and is reciprocated for feed purpose by rod 5, the shaft 10 projecting through a curved slot 9 in the guard 2. The bar is mounted in carrier 15 having slots 14 to receive the saw, the carrier being moved forward by steps and locked after each movement. The cut part may be removed between fixed guides 26, 27.
Patent GB-562807-A (GB)
Title: Improvements in and relating to feed and firing mechanisms for signal cartridges, cartridge flares, engine starters and like cartridge firing apparatus
IPC: F41A7/08
Filed: 1939-09-11
Abstract: 562,807. Generating products of combustion. COSTA, H. DA, and PLESSEY CO., Ltd. Sept. 11, 1939, Nos. 25597/39 and 14072/40. [Class 51 (i)] [Also in Group XXI] Relates to feed and firing mechanism for signal cartridges, cartridge flares, engine starters and like cartridge firing apparatus of the kind in which a rotary cartridge magazine is turned step-bystep to position the cartridges for firing by a rotary driving member which also operates a percussive firing hammer. According to the invention, the rotary member drives the magazine step-by-step through the agency of a Geneva stop mechanism, the firing hammer being operated between the steps of movement of the magazine. In the form shown in Fig. 7, six cartridge chambers 18 are fastened by a band 20 to a frame 16 rotated step-by-step with respect to a muzzle member 23 by a manually-operated ratchet gear 66 driving the spindle 14 of the' frame by means of a shaft 37, Geneva stop mechanism 38 and an over-ridable ball clutch 33. A pivoted firing pin 43 controlled by a spring 48 is operated by cam surfaces 53 to fire the cartridges at the rest periods of the frame. Fig. 10 shows an electric circuit for controlling a motor 89 rotating the Geneva stop device 38, the movements of the hammer being synchronized by an electromagnet 78 acting on a member 76 which opens a switch 83 in the motor circuit to stop the motor at the firing periods. Fig. 2 shows the spring-controlled ratchet cable gear 71 for rotating the magazine and a hinged cover 56 for charging the magazine, the spindle 57 of the cover acting on the firing pin to raise it from the cartridge to permit rotation of the magazine for loading. The muzzle is spring-pressed against the chambers and the gun gases act on the muzzle to move it axially to form a seal on firing.
Patent GB-383348-A (GB)
Title: Improvements of the carbon microphone
IPC: H04R21/02
Filed: 1931-09-12
Abstract: 383,348. Microphones. SIEMENS BROS. & CO., Ltd., Caxton House, Tothill Street, and WIGAN, E. R., 18, Cambridge Road, Lee, both in London. Sept. 12, 1931, No. 25633. [Class 40 (iv).] In a two-electrode granular microphone having a modulating element or moving electrode coupled to a diaphragm by a driving support, the modulating element is so dimensioned and/or shaped as to vibrate substantially as a whole and in phase with that end of the support to which it is fixed and is totally immersed in the granules in such manner that its motion in either direction is opposed by granules. Figs. 1 (III), (V), and (VII) show various forms of the moving and fixed electrodes me and fe, g being the granules, the chamber for which is closed at the front end by a relatively rigid closing member cm. Thus, as shown in Fig. 1 (III) both electrodes are of disc form, the moving electrode me having a conducting surface on one or both faces, or the fixed electrode fe may be cylindrical as shown in Fig. 1 (V), the moving electrode being of disc form as shown or conical. Alternatively, the fixed electrode may be of conical form as shown in Fig. 1 (VII), the moving electrode being either a hollow or solid cone. The constructions shown in Figs. 1 (V) and (VII) are such as to cause a radial, or partially radial flow of current as shown by heavy lines in a direction which is more or less coincident with the lines of gravitational force and in that part of the chamber in which the pressure on the granules induced by that force is greatest. Fig. 2 shows a preferred embodiment of the invention, the closing member cm being replaced by a silk cup cu so that the inertia of the mass. of granules is relied on to produce a proper resistance modulation. In this construction, the moving electrode me is connected to the diaphragm d by a spider support s, screw sc and resilient member rm. Granules are introduced into the chamber through the filling hole fo and a cavity may be provided so that granules therein help to maintain the pressure on the moving electrode when the microphone is in an inverted position. An annular chamber occupied by granules may also be formed between the inner surface of the barrel ba and the fixed electrode. According to a modification two fixed electrodes are employed and a totally immersed modulating element not forming part of the electric circuit is provided for modulation of the resistance of the granules. Specification 308,630, [Class 40 (iv), Telephones &c.], is referred to.
Patent GB-1022962-A (GB)
Title: Preparation of polyamides
IPC: C08G69/20
Filed: 1963-06-27
Abstract: A polyamide is made by polymerizing a lactam in the presence of an anionic catalyst and phenyl - ethoxy - methylimino methane. Specified lactams are e -caprolactam, oenantholactam, valerolactam, butyrolactam, a -methyl-e -caprolactam, caprylolactam, laurolactam and mixtures thereof.  Specified catalysts are the alkali and alkaline earth metals and hydrides, oxides, hydroxides and carbonates thereof, Grignard compounds and metal-alkyls. Fillers, e.g. wood meal, carborundum, carbon black, powdered slate, fine coal and coke breeze; polystyrene, polyformaldehyde, polypropylene, polyethylene or polyamides may be present in the reaction mixtures.
Patent GB-1127206-A (GB)
Title: Electronic commutation for electric motors
IPC: H02P6/14
Filed: 1966-06-08
Abstract: 1,127,206. Electric motors. SIEMENS SCHUCKERTWERKE A.G. 8 June, 1966 [16 June, 1965], No. 25636/66. Heading H2A. An electric motor has an n-phase centretapped winding (n#2) supplied from a unidirectional voltage supply through an electronic commutation arrangement consisting of switching elements interconnecting the phase windings, and controlled by auxiliary windings coupled with the respective phase windings so that in operation the parts of the phase windings which have induced voltages opposed to the supply are connected in series and the switching elements carry current through 180 degrees electrical. As shown, the motor has a 2-phase winding 1, 2 and 3, 4 connected to supply V through transistors 5, 6, 7, 8 which have their bases connected to centretapped auxiliary windings 9, 10 and the centre taps connected together through resistor 11. The voltages induced in the auxiliary windings are 90 degrees electrical out of phase and cause current to flow in the part of a phase winding in which the induced voltage is opposite to the applied voltage. In a 3-phase motor, Fig. 3 (not shown), the auxiliary windings are connected to the bases of the associated transistors and have the centre-taps connected to the emitters of their respective phases.
Patent GB-1247324-A (GB)
Title: Method and apparatus for treating pieces of material by microwaves
Inventor: FUTER RUDOLPH ERNST
IPC: H05B6/78
Filed: 1970-05-28
Abstract: 1,247,324. Pneumatic conveyers. R. E. FUTER. 28 May, 1970, No. 25698/70. Heading B8A. [Also in Divisions F4 and H5] Microwave energy is propagated through a microwave-confining chamber 61 in order to dry separate pieces of material passed into and out of the chamber through spaced inlet and outlet openings 68, 69, the pieces being moved individually between the openings on a stationary surface 62. The surface 62 has jets 63 through which air from a blower 76 is passed in order to propel the pieces and sweep their surfaces with air, the arrangement of jets being such that a separation is maintained between the pieces of at least one diameter of the pieces. Dummy loads 82, 83, are provided in order to absorb excess energy when working at less than full load. Feed and discharge tables 70, 71, similar in operation to the internal surface 62, may be provided. The surface 62 may form the lower wall of the microwave-confining chamber, or may form a false bottom for the chamber, in which case it must be made from a microwave transparent material. The microwave-confining chamber may be made up of several seriallyconnected waveguides, and a monitoring device may measure the dryness of the material emerging from the chamber and feed a signal back to a unit which controls the generator output accordingly.
Patent GB-1393811-A (GB)
Title: Spring suspension unit for a pneumatic or hydro-pneumatic  suspension system for vehicles
IPC: B60G17/048
Filed: 1972-06-01
Abstract: 1393811 Self-levelling suspension units V LANGEN [trading as LANGEN & CO] 1 June 1972 [4 June 1971] 25733/72 Heading F2S A self-levelling suspension unit has a threeway level control spool valve 11 acted on by two springs 16, 7 so as to isolate the load-carrying pressure chamber 10 when the unit is the desired length, connect it to exhaust T when the unit is extended, and connect it to a pressure source P. When the unit is contracted, one spring 16 permanently urging the valve 11 into one of its open positions (to exhaust T) and the other spring 7, over a part of the stroke of the unit, urging the valve 11 into the other of its open positions (to source P). There is required to be a constriction 27 in the flow path between the chamber 10 and the lines to exhaust and source, so that the rate of flow of fluid to and from the chamber 10 is independent of the load on the unit, although the rate may vary with the deflection of the suspension unit. In the position shown in Fig. 1 the unit is extended beyond its desired level, and the compression spring 7 has ceased to act. The permanently acting spring 16 biases the spool valve 11 to connect the pressure chamber 10 with the exhaust T. The pressure on the downstream side of the constriction 27 acts on the spool valve to aid the spring 16 against the pressure on the upstream side of the constriction. This results in a constant rate of flow to exhaust. If the piston 5 re-enters the cylinder beyond the desired level, the spring 7 re-engages the piston 5 and forces the spool valve 11 upwards to close off the connection (T) to exhaust and open the connection (P) to the pressure source. The rate of flow of fluid to the chamber 10 varies because the force of spring 7 varies with piston displacement. In Fig. 2 (not shown) the continuously acting spring is a compression spring which keeps the rate of flow from the source to the chamber 10 constant, and the intermittently acting spring is a biased tension spring controlling the rate of flow from the chamber 10 to exhaust in a manner depending on the deflection of the suspension unit.
Patent GB-721337-A (GB)
Title: New or improved life saving garment such as a jacket
IPC: B63C9/093
Filed: 1952-10-16
Abstract: 721,337. Buoyant garments. CLAUSSEN, C. Oct. 16, 1952 [July 4, 1952], No. 25913/52. Class 141. A life-saving garment such as a jacket is constructed entirely of buoyant water-repellent material having a very low specific gravity and being of such a thickness that it holds the wearer floating in water. As shown, the jacket comprises a back 1, two front parts 2, sleeves 3, and a collar 4 of water-repellent material, e.g. cellular rubber, and has at breast level an additional pod-like layer 5 of similar material which is narrower in the rear part 1 than in the front parts 2.
Patent GB-762374-A (GB)
Title: Improvements in deflectors for vehicle windscreens
IPC: B60J1/20
Filed: 1953-09-19
Abstract: 762,374. Deflectors for windscreens. CARRINGTON, A. H. Sept. 20, 1954 [Sept. 19, 1953], No. 25914/53. Class 108(1). A deflector for creating air turbulence in front of a windscreen 8 comprises a scoop 14 connected by trunking 15 and a fish-tailed nozzle 17 to an outlet slit or slits 12. In a modification the scoop may be fitted under a forward wheel arch, the outlet end of the nozzle seating against a rubber grommet under the bonnet 11. In a further modification the scoop may comprise a simple flap beneath but upwardly directed towards a slit 12.
Patent GB-748721-A (GB)
Title: Photographic material for making half tone photolithographic printing plates
IPC: G03F5/00
Filed: 1953-09-19
Abstract: 748,721. Self-screened sensitive material for producing photo-lithographic printing plates. KODAK, Ltd. (Eastman Kodak Co., Yule, J. A. C., and Maurer, R. E.). Sept. 20, 1954 [Sept. 19, 1953], No. 25920/53. Addition to 668,195 and 674,752. Drawings to Specification. Class 98 (2). The material of Specification 674,752 comprising a fully esterified cellulose organic ester support carrying a hydrophilic colloid layer containing both silver halide and an aqueous dispersion of a water-insoluble soft acrylate resin is modified by the procedure of Specification 699,659 so as to include within the layer a half-tone pattern of undulating sensitivity with the areas of lower sensitivity Clayden desensitized. Preferably the desensitization is in the form of a contact half-tone screen and the most sensitive areas include small latent image dots produced as by pre-exposure graded to complement the Clayden desensitizing exposures. In use the material receives a continuous tone image, and is developed to harden the colloid, usually gelatine, in the exposed areas; then washed to remove unhardened gelatine from the unexposed areas and thereby cause coagulation of the water-insoluble acrylate resin in such areas to form a resist; an alkaline solution applied next penetrates at the exposed areas only to hydrolyse the cellulose ester base and result after resist removal in a lithographic plate which is positive relative to the exposing light. Specification 544,033 also is referred to.
Patent GB-457837-A (GB)
Title: Improvements relating to bookrests
IPC: A47B65/00
Filed: 1935-09-18
Abstract: 457,837. Making bookrests. BAELZ EQUIPMENT, Ltd., and ALLAN, W. A., Moorfield Road, Wolverhampton. Sept. 18, 1935, No. 25941. [Class 83 (ii)] [See also Group XIV] A bookrest comprising essentially a back 1, a bottom member 2, two ends 3, 4, and a strut member 5 serving to tilt the rest backwardly is formed by bending up a single blank 6, Fig. 2. Marginal portions 18 form flanges 17 in the completed article, and portions 19 are bent over to stiffen the strut 5 and its triangular extensions. The parts are secured by spot welding or soldering, and the rest may be enamelled or painted.
Patent GB-1056027-A (GB)
Title: Manufacture of particle boards
IPC: B27N3/14
Filed: 1964-06-24
Abstract: 1,056,027. Laminates and laminating; moulding chipboards. M. HIMMELHEBER. June 24, 1964 [June 27, 1963], No. 26057/64. Headings B5A and B5N. In apparatus for the manufacture of chipboards, comprising an adhesive-bonded wood-fibre layer heat-bonded to at least one side of a wood particle mat, a fibre layer production line is arranged sideby-side with a particle mat production line and comprises means for depositing fibres on an endless screen belt 11 which conveys them through a press 12, between longitudinal trimming saws 13 and beneath a cross-cut saw 14, from which the so formed fibrous units pass on to a screen belt 16 from which every other unit is removed by a suction device 20, turned over and placed on a particle mat, screen imprinted face up. The fibrous units are carried in carriers 4 on a conveyer belt 1 below means 2 which spread wood particles on to the units to form particle mats. Meanwhile the units still in the unit production line pass on to a second screen belt 18 from which they are removed by a suction device 21 and placed in the particle production line just downstream of the means 2 so as to form an upper layer on the particle board. A saw 6 then operates to divide the assembly into individual boards which are then hot-pressed. In another embodiment two screen drums are provided for forming the fibrous units, one being upstream and the other downstream of the particle spreading station, for forming the lower and upper fibrous layers respectively. The screen imprinted sides of the fibrous units may be made to face towards or away from the particle mat depending on the direction of rotation of the drum. Adhesive may be applied between the meeting faces of the particle mats and fibrous units.