baber/WOPTO huggingface dataset:
Patent GB-967194-A (GB)
Title: An optical system
IPC: F21V33/00
Filed: 1961-01-18
Abstract: 967,194. Mounting photo-electric devices. LICENTIA PATENT-VERWALTUNGS-G.m.b.H. Jan. 18, 1961 [Jan. 19, 1960], No. 2047/61. Heading G1A. An optical unit to serve as a light source or detector comprises a casing 1 containing a support 7 bearing either an incandescent lamp 5 or a photo-cell, such as a photo-diode or phototransistor, a lens system 9, a first opening 2 at the casing end remote from the support, and a second opening 3 in the lateral wall of the casing between that end and the lens system, the casing being constructed to receive a mirror between the lens system 9 and the first opening 2 disposed at forty-five degrees to the optical axis of the lens system. Two units may be combined to form a light barrier to serve as a counting or safety device, or may be adapted for reflective scanning of a surface. A variety of configurations of two units are described with reference to Figs. 2-6 (not shown).
Patent GB-620556-A (GB)
Title: Improvements in or relating to vehicle number plates and the like devices
IPC: G09F7/12
Filed: 1947-01-23
Abstract: 620,556. Vehicle number plates. CORNERCROFT, Ltd., and RYCROFT, N. Jan. 23, 1947, No. 2066. Addition to 452,928. [Class 3(ii)] A number plate, Fig. 1, comprises a frame 15 having a series of openings 15a into each of which is fitted a stencil plate 16, Fig. 5, and a translucent backing plate 17, Fig. 6, the stencil plate having a forwardly projecting dished portion 16a which fits a frame opening, and the backing plate having a projecting portion 17a fitting within the dished portion 16a of the stencil plate without protruding through its cutout. The frame and the stencil plate are of the type described in the parent Specification. The stencil plate has lugs 16b by which it is attached to the backing plate 17. The longitudinal edges 17b of the backing plate are chamfered and the underside is recessed. In letters such as " A " in which part of the stencil is separated, the separated portion 19 is attached to the backing plate 17 by rivets or adhesive. The backing plate may have a slight depression suitably shaped to position the part correctly.
Patent GB-1398812-A (GB)
Title: Optical prism assembly
IPC: G03B33/00
Filed: 1973-01-15
Abstract: 1398812 Prism assemblies B W FILTERFABRIK JOHANNES WEBER KG 15 Jan 1973 [28 June 1972] 2100/73 Heading G2J An optical prism assembly, e.g. for camera or projector objectives, has a planar face and a coloured transparent layer between the planar face and a transparent e.g. glass plate. A prismatic disc 1 has a polygonal, e.g. pentagonal, central flat top surface 6 with oblique radial surfaces 7, and the coloured layer 3, e.g. a foil cemented to the planar surface or a layer applied as a liquid which may be hardenable, is covered by the transparent plate 2. A polarizing layer 5 may be disposed between layer 3 and plate 2 or between the layer and prism, followed by a further polarizing foil 11 cemented between glass discs 9, 10. Layer 3 is preferably divided into overlapping segments 4 of different colours with a mixed colour at the overlap.
Patent GB-1465522-A (GB)
Title: Control systems for induction motors
IPC: H02P27/04
Filed: 1974-01-17
Abstract: 1465522 Automatic control of speed GENERAL ELECTRIC CO 17 Jan 1974 [24 Jan 1973] 02140/74 Heading G3R In a speed control system for an induction motor, the frequency and voltage of the motor drive are controlled using a desired motor speed input applied to both frequency and voltage control paths, an actual motor speed signal being applied to only the voltage control path. The frequency is controlled according to desired motor speed input and a desired slip frequency signal, and the voltage controlled according to the actual and desired motor speeds . As shown, a frequency control signal Ws to the motor drive unit 40 is formed from the desired speed signal Wr and a desired slip frequency signal # O . The difference We between the desired speed signal and the actual motor speed signal, Wr, from a motor driven tachometer 20, passes through a PI controller 22 to form the voltage control signal E to unit 40. The desired speed signal Wr may be modified by the motor position error i.e. the difference between a desired position signal #r and actual rotor position signal #r from resolver 30. The unit 40 may be a frequency changer or a pulse width modulated inverter, and the system be analogue as Fig. 3 (not shown), digital or a hybrid system.
Patent GB-848832-A (GB)
Title: Improvements in or relating to transmission systems for automotive vehicles
Filed: 1957-01-21
Abstract: 848,832. Clutch control. REGIE NATIONALE DES USINES RENAULT. Jan. 21, 1957 [Jan. 26, 1956], No. 2147/57. Class 80 (2). The rate of engagement of a motor-vehicle clutch, controlled by a simple pedal or by fluid' or electric power from the gear-shift and then used in conjunction with a centrifugal starting clutch or fluid-coupling, is controlled in response to engine torque-demand and independently of any power clutch-operating device, by a dashpot piston 2 secured to a rod 1 connected to the clutch control and movable between cylinder chambers 5, 6 which, during clutch-disengaging leftward movement, communicate freely through a one-way valve 18 or peripheral piston seat-ring, whilst rightward engaging movement is retarded, in Fig. 2, by a valve 21 responsive to engine-manifold depression 25 acting on a diaphragm 22 to control the flow from the chamber 6 to 5, whilst in Fig. 1, not shown, a valve mechanically linked to the engine throttle controls the flow into the chamber 5, and the chamber 6 is permanently vented.
Patent GB-776569-A (GB)
Title: Process for manufacturing impregnated wood-fibre board for use as shuttering for casting concrete
IPC: D21J1/00
Filed: 1955-01-25
Abstract: 776,569. Impregnated and coated fibreboard. AKTIEBOLAGET STATENS SKOGSINDUSTRIER. Jan. 25, 1955 [Jan. 26, 1954], No. 2154/55. Class 96. In manufacturing wood fibre-board, e.g. for shuttering concrete, to one face of a wet fibre felt is applied an impregnated agent, e.g. hardening oil, and an alkali-resistant synthetic resin, the treated face then being pressed against a polished plate at increased temperature and being made acid prior to the completion of the pressing, whereby the oil &c. becomes uniformly distributed throughout the felt, simultaneously driving the water from the felt through the untreated face, the synthetic resin remaining as a water-impermeable alkaliresistant coating on the treated face of the board, and finally hardening the board. The impregnating agent may be linseed oil, tall oil, or esters, or alkyd resins derived therefrom, e.g. tall oil modified with maleic or phthalic acid anhydride and esterified with glycerol, Chinese wood oil, or asphalt, or a mixture thereof. The synthetic resin may be thermosetting, e.g. phenol-formaldehyde, cationic carbamide-formaldehyde, urea-formaldehyde, or melamineformaldehyde, or thermoplastic, e.g. polyvinyl chloride or polystyrol, or a mixture of synthetic resins may be used. The oil and the synthetic resin may be applied simultaneously, the resin being suspended in an aqueous emulsion of oil, or these may be applied separately. The amount of oil may be 3 to 12 per cent and the resin 0.5 to 10 per cent. An example mentions 5 parts of urea-formaldehyde resin and 5 of melamine-formaldehyde resin dissolved in 40 of water, and a mixture sprayed on a wet fibre felt which is pressed against a polished plate at a temperature of 150‹ to 200‹ C. for 3 to 10 hours. In a further example the fibre felt is treated with a mixture of a cationic carbamideformaldehyde resin and an alkyd resin.
Patent GB-367136-A (GB)
Title: Improvements in or relating to lifting jacks
IPC: E01B29/04
Filed: 1931-01-22
Abstract: 367,136. Lifting-jacks. INGLIS, R. J. M., Tantah, Peebles. Jan. 22, 1931, No. 2215. [Class 78 (iii).] A ratchet jack has a spring-pressed retaining pawl depending from a pivot at or near the top of the jack frame and having teeth near its lower end engaging rack teeth on the lifting pillar. The lifting pillar 1 has rack teeth 8 engaged by the lifting pawl 5 on the operating lever socket 3. The retaining pawl 7 depends from a pivot 9 near the top of the frame and has teeth 10 near its lower end engaging the rack teeth. A recess at the back of the retaining pawl is engaged by one end of a blade spring 11 having a hook-shaped end engaging a bar 17 on the frame. The spring may protrude through an aperture in the frame. A coiled spring may be used.
Patent GB-198004-A (GB)
Title: Improvements in means to be applied in mounting yarn supports for use in creels for use with warping and beaming and like machines
IPC: B65H49/10
Filed: 1922-01-25
Abstract: 198,004. Holt, F. A., and Kershaw, G. Jan. 25, 1922. Yarns, warping and beaming.-Relates to creels for use in warping and beaming and like machines of the kind in which groups of cops or bobbins or other yarn bodies are mouted on revoluble holders, the end of the thread on one bobbin being connected to the beginning of the thread on the next. An adjustable bearing for mounting the revoluble holder 22 on a rail 18 comprises a screwed bolt 40 passing with clearance through a hole 41 in the rail, two washers 42, 43 flat on one side and rounded on the other, a nut 44 and a pivot sleeve 39 both hollowed to fit the washers, and a securing nut 40. A resilient washer 45, Fig. 6, has radial arms 452 bent out of the plane of the central part. The yarn passes over guide-rods 28, as shown in Fig. 2.
Patent GB-1385676-A (GB)
Title: Documentation machines
IPC: G03B15/00
Filed: 1971-01-18
Abstract: 1385676 Recording tickets or other documents issued A STEVENS 18 April 1972 [18 Jan 1971] 2418/71 Heading G4T In a machine for printing data on a document, a camera is provided and arranged for photographing the data printed on the document. The document may be a betting slip and the data may be the time, date, serial number and cash amount tendered, the last-mentioned being printed by a cash register combined with the machine. Alternatively, the machine may be used in car park systems, libraries, or for stock control in shops. As shown, a document entered at 3 is fed between rolls 4, 6 and supported on spaced endless bands 5. When the document trips a microswitch 9, a hammer 10 between the bands 5 is operated to print data from wheels 12 on the document. Wheels 12 may include time wheels driven by a synchronous motor, serial number wheels indexed by a solenoid which is in turn energized each time hammer 10 operates, and date wheels. The serial number and time may be displayed at window 25. Operation of hammer 10 trips a microswitch 14 which deenergizes the hammer-operating solenoid and causes the feed of film 24 between spools 16, 17 of strip film camera 15 and operation of the camera shutter adjacent lens 19. A lamp 21 illuminates the document at photographing station 20, light reflected from the document passing via mirrors 22, 23 to the camera. A drive from roller 7 operates the film feed mechanism so that the speeds of the film and the document are synchronized. In a second embodiment, Figs. 2 and 3 (not shown), the document is photographed from below and a second clock is provided. The second clock is momentarily illuminated and light reflected therefrom passes to the camera to be recorded alongside the photographed record of the printed time, thereby serving as a check on the accuracy of the time printing wheels. The machine may include devices, e.g. mioroswitches, photo-cells, photodiodes, to detect documents (e.g. folded ones) which exceed a minimum thickness or to check the presence of a pattern, pre-printed on valid documents.
Patent GB-184123-A (GB)
Title: Improvements in ball-bearings
IPC: F16C35/067
Filed: 1922-01-27
Abstract: 184,123. Munktells Mekaniska Verkstads Aktiebolag., and Edholm, F. Jan. 27, 1922. Ball bearings.-The races are enclosed in a casing, divided diametrically, which, when removed, allows the outer race to be tilted for inspection or renewal of the balls. The invention is described as applied to the intermediate bearing of the crank-shaft of an internal-combustion engine. As shown in Figs. 2 and 3. the bore of the outer race 4 is spherical and the bearing is enclosed in the halves 7, 8 of the casing, the half 8 being bolted to the crank-case 1. To inspect the balls, the half 8 of the casing is removed, the half 7 rotated into the position originally occupied by the half 8 and removed, and the outer race 4 tilted. The sides of the half 7 of the casing may be omitted, or, as shown in Fig. 6, the half 7 may be dispensed with and the inner and outer faces of the outer race 4 made spherical. In this case the race 4 can be tilted and inspection made on renewal of the half 8 of the casing.
Patent GB-211670-A (GB)
Title: Non-splash desiccators for use with liquid drying agents
IPC: B01L1/02
Filed: 1923-01-27
Abstract: 211,670. Bradford, S. C. Jan. 27, 1923. Desiccators for laboratory use. - The liquid reservoir of a desiccator is formed so as to prevent splashes of liquid from reaching the drying-compartment when the desiccator is carried from one place to another. The reservoir wall of the desiccator shown in Fig. 1 is curved inwardly and is provided with a ring which rests upon the neck of the desiccator. The usual form of desiccator having a reservoir with a straight conical wall may be provided with a funnelshaped ring which rests upon the neck of the desiccator.
Patent GB-1391602-A (GB)
Title: Earth moving equipment
IPC: E02F3/24
Filed: 1971-01-19
Abstract: 1391602 Excavators DEFENCE SECRETARY OF STATE FOR 17 April 1972 [19 Jan 1971] 2480/71 Heading E1F A cutting tool for an earth-moving machine comprises a shovel member 7 with a substantially flat earth-engaging face mounted on a movable support arm 2 so that its face is substantially perpendicular to its direction of movement as it is brought into contact  with material 5 being excavated, and rigidly attached cutting teeth 6 which project deeper into the material being excavated than the shovel member. As shown, four shovel members and support arms are carried by a rotary drum 3 which may be mounted on a mobile earth-moving, e.g. mining, machine and driven by sprocket and chain or a hub-mounted hydraulic motor. The machine advances in the direction of the arrow A, and soil excavated by the cutting tools is pushed back towards a scraper blade 4 carried by the machine. The teeth are welded to the shovel members, and the latter may be secured to the arms 2 by welding or bolts. The outermost teeth may be inclined outwardly, and each shovel member may have four teeth, or alternate members may have three and four teeth. Instead of being mounted on a rotary drum, the cutting tools may be attached to a chain passing round sprockets.
Patent GB-329689-A (GB)
Title: Improvements relating to volume control devices or systems for radio receiving apparatus
IPC: H03G3/16
Filed: 1929-01-24
Abstract: 329,689. Hall, A., and Ferranti, Ltd. Jan. 24, 1929. Thermionic amplifiers; receiving-sets. - Relates to means for controlling the output volume of a receiving set from a distance. The control grid b of a screened-grid amplifier a is connected through a fixed biasing resistance d to the filament, and a second variable resistance f located at any desired distance from the set through flexible leads g, g', is used to vary the effective biasing-potential applied to the grid b from a battery e.
Patent GB-663658-A (GB)
Title: A new or improved joint for ducting
IPC: F16L21/06
Filed: 1949-01-29
Abstract: 663,658. Pipe couplings. BLACKBURN & GENERAL AIRCRAFT, Ltd., (formerly BLACKBURN AIRCRAFT, Ltd.), and FENTON, G. B. Jan. 30, 1950 [Jan. 29, 1949 No. 2506/49. Class 99 (i) An air duct section 3 is formed with a halfsocket 31 to allow of lateral assembly of a plain-ended section 2 which is secured by a flexible strap 5 having a quick-release fastening 10. The strap may be secured to the section 3 or an adjacent support and be hinged at a point diametrically opposite the fastening.
Patent GB-1454564-A (GB)
Title: Rotational position sensor
IPC: G01D5/30
Filed: 1974-01-18
Abstract: 1454564 Photo-electric rotational position sensor BELL & HOWELL CO 18 Jan 1974 [12 Feb 1973] 02517/74 Heading G1A Such a sensor comprises a point source of light, with means restricting the light to an angular range, rotatable about an axis of rotation relatively to two photo-cells spaced further from and subtending angular regions at said axis connected electrically in opposing relationship and each providing an electrical signal determined by the angular range/ region overlap. Sensor 80 comprises cylindrical member 82 mounted coaxially with the axis of rotation 86 of element 84, whose angular position is to be determined, and planar photo-cells 88, 90 in a common plane perpendicular to the radial axis 92, perpendicular to axis 86. Within circular aperture 98 is mounted diode 96 emitting light from point 104 through bulb 102 forming a beam defined by cylindrical aperture 108. With the dimensions shown the element 84 can rotate through about  25degrees, with the light striking both photo-cells, while the distance between the diode and the photo-cells varies by only 0À004 inches, so that, if each photo-cell >0À186 inches wide, their output varies linearly if they have an opposed parallel connection. In the circuit of Fig. 10, with photo-cells 88 and 90 illuminated the output is adjusted to 5V by the 5K# potentiometer, element 84 is then rotated to one extreme, the 500# potentiometer is adjusted for an output of 10V and at the other extreme the 5K# potentiometer is adjusted for 0V output. To increase the angular range, making aperture 108 conical can provide a beam at least 90 degrees wide. The 500# potentiometer may be adjusted for a high voltage swing linear over a limited angular range or a lower voltage swing for a larger range. Element 84 may be part of a tension arm of a cine camera or magnetic tape transport, with a servosystem for driving the reel according to the output from elements 88 and 90.
Patent GB-690255-A (GB)
Title: Improvements in or relating to the treatment of finely ground sulphur
IPC: C01B17/10
Filed: 1951-02-01
Abstract: <PICT:0690255/III/1> Finely ground sulphur which has a tendency to cake is heated from 95 DEG C up to the melting point and maintained at the temperature chosen for a time dependent on the temperature, and not more than 24 hours, to convert the sulphur to a non-caking form, cooled to about 46 DEG C, when the agglomerate is broken up to produce a finely ground non-caking product.  Treatment times specified (for the determination of which a test is described) are, for 95 DEG C, 80 minutes, for 100-105 DEG C, 40 minutes but longer periods may be employed.  In the drawing, finely ground sulphur from hopper 1 is evenly spread on a conveyer belt 3 by a bar 5 and light roller 6 to give a thickness preferably of 1/8 -inches.  The belt 3 is heated for example by vapours of a boiling liquid, a bed of hot oil, or by infra-red lamps.  The heated sulphur then passes to a storage hopper 8 where the temperature acquired is maintained for the desired period, before dropping to a cooling conveyer 9, also provided with a bar 11 and roller 12.  The sulphur, cooled to 46 DEG C or below is removed by scraper 13 and broken up by a vibrating screen 14, unbroken agglomerates being rejected by elevator 16 and conveyer 17.  The product, whilst retaining the original particle size, has smoother contours and increased transparency.
Patent GB-906887-A (GB)
Title: Braking control for door closers
IPC: E05F3/16
Filed: 1960-01-25
Abstract: 906,887. Door closers. BARDFELD, W. Jan. 25, 1960 [Jan. 29, 1959], No. 2592/60. Class 65 (1). A door closer comprises a rotatable closing shaft 1 urged by a spring 38 in the door-closing direction and a brake for braking the closing movement, the brake being actuated by a control cam 18 (Fig. 4) which can be set in various angular positions about an axis 19 spaced from the axis (of the shaft 1) about which the cam is rotated when the shaft is rotated in order that the braking torque may vary in dependence on the angular position of the shaft. The brake comprises a pair of brake shoes 3 (Figs. 1, 9, 10) pivoted on a pin 7 (Fig. 6) carried by a plate 11 fixed in the closer casing 9 and adapted to be pressed apart into contact with the inner wall of a brake drum 2 by a second cam 12 located between the opposed ends 14 of the shoes and turned by a follower arm 15 carrying a roller 16 for contact with the face 17 of the control cam 18. The brake drum is connected to the shaft 1 by a pawl 33 and ratchet-wheel 31 so as to be rotated only during door closing movement and the brake shoes are held resiliently in their inoperative position by circlips 6 located in grooves 5 in the shoes. The control cam is pivoted at 19 to a distance-piece 22 which is rotatable on the shaft 1 and can be clamped thereto in any angular position by means of a clamping-screw 25 (Fig. 1) engaging a ball 26 which co-operates with a groove 26<SP>1</SP> in the shaft. During door closing movement the direction of rotation of the shaft is anticlockwise as seen in Fig. 4. For adjustment, the door is first opened until it is in the position at which, during closing movement the braking action is to cease and fast final closing movement is to begin, and the distancepiece 22 is then clamped to the shaft so that the end 18<SP>1</SP> of the control cam is opposite the roller 16. The cam is then adjusted on its spindle 19 to pre-set the variation in the braking torque, which can be made to increase, decrease, or remain constant as the door closes according as the end 18<SP>1</SP> of the cam is at a greater, a lesser, or the same distance from the shaft 1 than is the end 18<SP>11</SP>, and for this purpose two set-screws 20, 21 in engagement with oblique surfaces 24 on the cam are provided in the distance-piece. The follower arm consists of two parts 15<SP>1</SP>, 15<SP>11</SP> pivotally connected at 27 and adapted to be set at various angular positions thereby to vary the magnitude of the braking torque. In order to set the parts a screw 28 is provided in the part 15<SP>1</SP> and engages an oblique surface 29 on the part 15<SP>11</SP>.
Patent GB-939625-A (GB)
Title: Improvements in or relating to dampers
Inventor: LOWE WALTER MAX
IPC: F16K3/02
Filed: 1961-01-23
Abstract: 939,625. Dampers. THERMO-TECHNICAL DEVELOPMENT Ltd. Jan. 23, 1962 [Jan. 23, 1961], No. 2614/61. Class 51 (1). A flue damper comprises a fixed frame member, a moving member, a gas-filled barrier conduit between the fixed and moving members, means to pressurize the conduit to a higher pressure than that of the flue gas and resilient, flexible components stressed to seal the conduit along its length. In Figs. 1-3 the damper blind 1 is wound around a roller 2 and passes through slots 4 in the frame unit 3, being sealed by the flexible components 6, 7 and 15 and defining with the frame unit ducts 9, 12 and 13 forming the barrier conduit. A fan 8 supplies pressurized air to the ducts 9, 12 and 13 under control of valves 11 and 11a. In a modification, Fig. 4 (not shown), the members 7 are pressed by springs against the members 4. In further modifications the blind itself forms part of the barrier conduit, Figs. 5 and 6 (not shown), and the blind may be replaced by a slide, Fig. 7 (not shown). A final modification, Fig. 8 (not shown), has a pivoted damper with edge abutment and resilient strip, respectively engaging fixed resilient strip and frame abutment to define the barrier conduit.