baber/WOPTO huggingface dataset:
Patent GB-667890-A (GB)
Title: Improvements in spectrometric apparatus
IPC: G01J3/14
Filed: 1950-03-14
Abstract: 667,890. Spectrometric apparatus. ZEISSOPTON OPTISCHE WERKE OBERKOCHEN GES. March 14, 1950 [March 23, 1949], No. 6294/50. Class 97 (i). In spectrometric apparatus having a rotatable dispersing element, such as a prism or grating, and an arrangement for reading its position on a scale, the scale is stationary and an image of the entrance slit of the apparatus is projected thereon by light reflected by a reflecting plane secured to the dispersing element, to serve as an index for reading the scale. As shown, light from the entrance slit 13, 14 is collimated by a concave mirror 15 and directed to a prism 16. Part of the light incident on the surface 17 passes therethrough and is reflected back to the mirror 16, whereby it is focused on the exit slot 19, 20 to form the spectrum. The part of the beam reflected by the surface 17 passes to a concave mirror 21 when it is reflected back to the surface 17 and focused on the scale 18 to serve as an index. The prism 16 is rotated to vary the wavelength passing the exit slit. The mirror 21 is either fixed or rotates with the prism and the width of the image of the slit 13, 14 formed on the scale 18 gives a measure of the range of wavelengths passing the exit slit. A modification is described using a quadrilateral dispersing prism and lenses instead of concave mirrors.
Patent GB-164446-A (GB)
Title: Improvements in or relating to coupling means for releasably suspending a mass and for like purposes
IPC: B64D1/06
Filed: 1920-03-02
Abstract: 164,446. Wearham, G. A. March 2, 1920. Hooks.-Relates to means for supporting one or more loads at two prints and releasing them simultaneously, the apparatus being especially adapted for use on aircraft. In the form shown in Figs. 1 and 2, the load is suspended from pivoted hooks 1, 2 which may be of the kind described in Specification 156,310. The hooks are connected by rods 5, 6 to a frame 7, and the weight of the load tends to turn this frame and allow the hooks to turn and release the load. There is a bar-and-slot connection between the frame 7 and rotatable discs 13, which are retained by a spring-controlled trigger 15. Upon operating the trigger, the frame turns under the load and the hooks 1, 2 turn simultaneously to release the load. Should one of the connections between the frame 7 and the hook be ruptured or disconnected thereby releasing the load, the frame 7 moves longitudinally and allows the other hook to turn to the releasing position. Should one of the hooks fail to operate for any reason, a locking piece 18 is provided for preventing the other hook from releasing the load. This piece 18 is pivoted on the axis of the discs 13 and is provided with arms 19 adapted to engage recesses in the frame 7. The piece is controlled by a spring 21 and also engages the trigger 15, the depth of the tooth being such that, when the trigger is operated, the locking piece is released before the discs 13 and moves into engagement with the frame 7 locking it against sliding movement and thereby preventing one only of the hooks moving to the releasing position. In the event of the load being released at one point only by a rupture of a member that does not affect a connecting rod, a connection 23 is arranged between the trigger and the load so as to release the load from the other point of support. If desired, the connections can be made adjustable in order that the load may be released at one point slightly before the other. In modifications, the hooks are retained in position by detents on a sliding and rotatable bar, which is turned or moved longitudinally to release the load simultaneously and in the case of a rupture of one of the connections the bar slides or rotates to allow the other hook to move to releasing position.
Patent GB-161161-A (GB)
Title: Method of producing ammonium chloride in combusting or distilling alum slate or similar bituminous shales
IPC: C01C1/16
Filed: 1921-02-25
Abstract: The process described in the parent Specification for the recovery of ammonia as ammonium chloride in the distillation of coal, consisting in the addition of an alkali or alkaline-earth chloride together with silica to the furnace charge, is applied to the distillation of alum slate or other bituminous slate or shale. In an example, the furnace charge consists of an intimate mixture of rock salt, quartz, water and shale.  The products of the distillation are either condensed together as a liquor, or are only cooled sufficiently to deposit the ammonium chloride in the solid state.
Patent GB-102679-A (GB)
Title: Improvements in and relating to Internal Combustion Engines.
Inventor: HENKLE FRANK ALBERT
IPC: F02B75/22
Filed: 1916-05-04
Abstract: 102,679. Henkle, F. A. May 4, 1916. Channels in pistons -In internal-combustion engines oil or other lubricant is admitted to the cylinder by a pipe 5 and is conducted to the working faces of the piston and cylinder wall through one or more grooves 4 formed in the piston.
Patent GB-855602-A (GB)
Title: Improvements in or relating to transistor circuits for generating control impulses
IPC: H03K3/282
Filed: 1957-02-27
Abstract: 855,602. Transistor pulse shaping and frequency dividing circuits. FERNSEH G.m.b.H. Feb. 27, 1957 [Feb. 28, 1956], No. 6591/57. Class 40 (6). In a circuit employing an earthed emitter transistor 4 having the base connected over a resistor 5 to a negative potential, input signals A, Fig. 2 are applied over a capacitor 2 to the base of the transistor. The positive-going leading edge of the wave A causes the potential of the base; B to rise rapidly cutting-off the transistor so that the collector current C, falls to Ico. Due to the time constant consisting of capacitor 2 and the resistor 5 and input resistance of transistor 4 the base potential falls towards earth so that at time t 2  collector current commences to flow again and increases according to curve C. The potential appearing between collector and earth would follow the chain line 10 but due to the presence of a capacitor 8 the collector potential follows the curve 12. The collector potential falls relatively slowly as capacitor 8 charges over resistor 9 but at time t 3  the transistor is suddenly rendered conducting by the negative-going edge of wave-form A with the result that the transistor presents a low impedance and the collector potential rises abruptly to near earth potential to generate the back edge of curve 12. The waveform D is passed through differentiating circuits 6, 7 to give the output waveform E. With an increase in temperature the base potential falls more rapidly along the chain line so that the current in the collector circuit is greater at the time of arrival of the negative-going edge of wave A and the resulting pulse 13 is decreased.. In a similar manner if the pulse length of waveform A is increased the collector current also falls to a greater extent and a smaller pulse 13 results. The circuit may be employed to drive a crosscoupled pair of transistors 16, 17, Fig. 3 of a frequency divider with the result that synchronism is maintained over a larger range of input frequencies. Curve A, Fig. 4 shows the discharge time of one of the couplings capacitors 18, 19 with synchronism being maintained over a time interval t to give a division of five. If the temperature of operation increases and the discharge curve is as shown at B then the circuit could operate stably with a frequency division ratio of 4. This is avoided by employing the circuit of transistor 4 which causes the synchronizing pulses to be decreased in amplitude and synchronism only occurs at the fifth pulse. When the input frequency is increased, curve C triggering would occur at the sixth pulse but this is avoided by circuit 4 which causes the pulses to increase in amplitude so that triggering is maintained on the fifth pulse, curve D.
Patent GB-851348-A (GB)
Title: Hyperbolic tracking radio systems
Inventor: CLARKE GEORGE FARREN
IPC: G01S1/30
Filed: 1952-03-13
Abstract: 851,348. Radio position finding systems. MINISTER OF SUPPLY. March 6, 1953 [March 13, 1952], No. 6609/52. Class 40(7). In a pulse or C.W. hyperbolic radar system, a display system comprises a set of indicator lamps at the receiver, which light to indicate the position of a target, and which are positioned on a screen to lie along hyperbolic lattice lines at points of intersection or are arranged in a rectangle with uniform separation. The display is fed from three spaced receiving stations through channels containing delay lines and coincidence gates such that the lamp appropriate to the target range is lit. As shown, the receiving stations A,C and B,C are connected by radio links. Signals from target X to A pass through delay line D1, those through C pass along delay line D3 and those through B pass along line D2. Coincidence of the signals through D3, D1 causes operation of one of gates G1, G2 &c. and coincidence of signals through D3, D2 effects operation of one of gates G100, G101 &c., and the appropriate indicator lamp 1 is lit. In a second embodiment, not shown, the system is adapted for use as an interrogating system and the delay lines are adjustable for reception from targets of a known range. The indicator in this case responds in accordance with the particular frequency of transmission of the replying aircraft. Continuous wave or pulsed transmissions may be employed.
Patent GB-635186-A (GB)
Title: Instrument for measuring or indicating the characteristics of electric pulses
IPC: H03K9/00
Filed: 1948-03-03
Abstract: 635,186. Thermionic valve ammeters and voltmeters; frequency measurements; combinations of instruments. LORD, A. V., LAX, L., and PYE, Ltd. March 3, 1948, No. 6651. [Class 37] An instrument for measuring or indicating the characteristics of the pulses of a train of electric pulses comprises two movable pointers 6, 13, Fig. 2, which overlap one another, one pointer 6 indicating the duty cycle against one calibrated scale 15, the other 13 indicating the pulse repetition frequency against a second calibrated scale 16, and the crossing point p of the two pointers indicating the pulse width against a third set of calibrations 14. The train of pulses is fed through a limiter 1, Fig. 1, for limiting the pulses to a constant amplitude, and thence to two parallel circuits of which the first includes a valve 2. The pulses are applied with positive sign to the grid of this valve through a condenser-resistance network 3, 4 having a long time constant. A battery 5 biasses the grid negatively to such a value that the valve is non-conducting between pulses so that the anode current is proportional to the duty cycle, i.e. the ratio of the time duration of the pulse to the interval between the leading edges of two successive pulses. The anode current is passed through a meter, the pointer 6 of which indicates on the " duty cycle " scale 15, Fig. 2. The second of the two parallel circuits comprises an oscillator consisting of a valve 7 and feedback transformer 8. The pulses are fed to the grid of this oscillator via a condenser 9 and resistance 10 so that the valve oscillates in synchronism with the pulse train. The output of the valve 7 is fed via an integrating circuit consisting of a condenser 11 and resistance 12 to a meter of which the pointer 13 moves over the scale 16, Fig. 2, calibrated in terms of pulse repetition frequency. The crossing point p of the pointers 6, 13 co-operates with a family of curves 14 on the instrument dial to indicate the pulse width, which is the ratio of the duty cycle to the pulse repetition frequency.
Patent GB-1522242-A (GB)
Title: Crack motion detectors
IPC: G01B5/30
Filed: 1977-01-27
Abstract: 1522242 Crack monitoring device K LORD 27 Jan 1977 [20 Feb 1976] 6714/76 Heading G1M A device for monitoring a settlement crack 9 in a wall comprises a pair of overlapping vandal resistant sheets 1, 3 secured to the wall either side of the crack with a spacer 4 interposed between the wall and top sheet 3, the sheets carrying a scale 5 to indicate the relative displacement of the sheets on both the horizontal and vertical directions. Each sheet may carry a scale 5 as shown, and a hole 6 may be provided in the top sheet 3 for cooperation with the scale on the lower sheet. After attachment of the device to the wall, a hole may be drilled in the lower sheet 1 through hole 6 to indicate the initial relative position of the sheets. In the overlapping region, sheet 3 may be smaller than sheet 1, and the scale may be provided around the edge of sheet 3, preferably on sheet 1. Prior to attachment to the wall, the sheets may be joined temporarily by a tack adhesive. The sheets may be of polyester impregnated glass fibre or polycarbonate.
Patent GB-473422-A (GB)
Title: A colour table for testing the correctness of colour or sensitisation in colour photography
IPC: G03C7/00
Filed: 1936-03-06
Abstract: 473,422. Colour photography. GROVES, W. W. (I. G. Farbenindustrie Akt.-Ges.) March 6, 1936, No. 6819. [Class 98 (ii)] The correctness of colour or sensitization in colour photography is tested by photographing on a lenticular film a colour table, comprising strips of characteristic colour and grey scales, so that the grey scales are substantially perpendicular to the longitudinal axes of the cylindrical lenses of the film, and by then viewing the photograph after development in such a manner that the angle subtended at the eye by successive lenses 1, 2, 3 ... , Fig. 3, varies progressively from one lens to the next, the resulting pattern indicating the correctness of the reproduction. As shown, the colour table, Fig. 1, carries three fields R, G, B coloured respectively red, green and blue and bearing identifying marks such as notches or lettering, graduated grey scales being provided between the colour fields. After photography, the film may be developed by reversal and viewed in the manner stated above, the effect being produced either by bending the film or by arranging cylindrical lenses in front of the flat film. The effect is that through each of the lenses 1 ... 10 a slightly different view of the three colour bands r, g, b is obtained. For example, through the lens 1 only the extreme edge of the red image band r is seen, whereas through the lens 3 the edges of the red and green images are seen. The total effect is as shown in Fig. 4. For the image of the red strip the lenses 1-3 will be bright and the others dark so that a bright strip a on the image will be succeeded by dark strips b, c. Similarly, the images of the green strip G and blue strip B will contain bright and dark bands. Between the images R, G, B are the images I, II ... VIII of the grey scales. If each colour has been correctly reproduced these images will show no particular structure, but if one colour has been reproduced too darkly the field will include dark lines, e.g. a, d, g. To determine which colour has been incorrectly reproduced, the dark line is followed until it meets a bright band in one of the colour bands, in this case the red band R, this band indicating the incorrect colour.
Patent GB-671163-A (GB)
Title: Improvements in bimetal strip thermostatic switches
IPC: H01H37/52
Filed: 1950-03-20
Abstract: 671,163. Thermal switches. PERMA SOC. ANON. March 20, 1950. [March 23, 1949] No. 6844/50. Class 38 (v). A thermal switch for controlling the temperature of an electric heater 2, comprises a frame 1 with a pin 5 on which are freely pivoted a bimetallic strip 3 and a metal supporting member 6, the latter supporting flexible blade. contact carrying members 8, 9. As the temperature of the heater rises, the blade 3 deforms, its middle portion coming into contact with the heater 2 and its free end lifting a push piece 12 secured to the blade 9, so as to raise the free end of the blade 9 to open the contacts 11. An adjusting screw 18 carried by the frame 1, has a tip which engages the end of the member 6 to determine the extent to which the bimetallic strip must deform to cause opening of the contacts.
Patent GB-163836-A (GB)
Title: Improvements in and relating to pneumatic door checks and like devices
IPC: E05F5/02
Filed: 1920-03-06
Abstract: 163,836. Woolliscroft, J. H. March 6, 1920. Checks.-A pneumatic door check consists of a cylinder 1, with an air valve 10, mounted on one member of the door, in which slides a rubber ball 9 held in a piston 8 with a rod 3 surrounded by a volute spring 13 in order to allow angular motion of the rod relative to the axis of the cylinder. The end of the rod has a buffer 5 and a collar 6 which co-operates with a clip 7 fixed on the other door member. On opening the door, the piston is withdrawn to the end of its stroke by the clip 7 assisted by a spring 11, whereupon the rod is slightly rocked to free the collar, the rod being restored to its central position by the volute spring.
Patent GB-1367252-A (GB)
Title: Ring gear for an automatic power transmission mechanism
IPC: F16H57/08
Filed: 1972-02-15
Abstract: 1367252 Toothed gearing NISSAN MOTOR CO Ltd 15 Feb 1972 [20 Aug 1971] 7001/72 Heading F2Q  A unitary constructed, i.e. fabricated ring gear 28 and clutch or brake hub 34 for an automotive automatic power transmission, Fig. 5 (not shown), having a multiple disc type friction clutch or brake 76, 78, including projecting portions and a planetary gear set 54 including a number of planetary pinions 58, the gear body 28 comprising a simple ring having internal teeth 32, with which the planetary pinions mesh, and a clutch or brake hub 34 of sheet metal electron beam welded thereto with an outer peripheral axially extending portion 3 having a number of circumferentially spaced slots 40 for co-operation with the projecting portions of the clutch or brake discs.
Patent GB-197917-A (GB)
IPC: B41J7/30
Filed: 1923-03-12
Abstract: 197,917. Devlaminck, R. S., and Gillant, M. C. N. May 16, 1922, [Convention date]. Void [Publislied under Sect. 91 of the Act]. Type-lever machines. - The type-levers are arrested by means of a resilient stop, preferably consisting of an arcuate strip a of rubber secured to the segment f, and having a rib d for engaging the type-levers c. The stop may be secured by means of screws g which may pass through a metal strip e. The stop may be reinforced with wire.
Patent GB-648756-A (GB)
Title: Adjustable electrode supporting structures
IPC: H01J19/50
Filed: 1947-03-14
Abstract: 648,756. Discharge apparatus. STANDARD TELEPHONES & CABLES, Ltd. March 14, 1947, No. 7145. Convention date, April 4, 1946. [Class 39 (i)] An adjustable support for an electrode comprises a member 7 supporting the electrode at one end and having at its other end an annular flange 10 shaped to slide between a pair of clamping rings 11, 12 shaped to form spherical surfaces. The clamping rings may be secured to member 15 by bolts 20 which are smaller than the apertures in the clamping ring to allow lateral adjustment as well as the tilt adjustment provided by flange 10 and clamping rings 11, 12. The support may be used for a grid 2 of a thermionic valve and member 15 may be sealed to the envelope to provide a ring connector for the grid 2.
Patent GB-1113375-A (GB)
Title: Footwear
Inventor: BULLOCK IAN HARRY
IPC: A43B13/12
Filed: 1966-02-18
Abstract: A method of making a boot or shoe having a protective midsole e.g. of steel, includes the step of coating the midsole with an elastomeric material prior to its incorporation in the boot or shoe.  The protective midsole is coated with a tacky rubber composition and is incorporated in a moulded rubber boot or shoe. The boot or shoe may be made by a latex dipping process or by placing the coated midsole on a partially vulcanized outsole in a sole mould and then moulding an upper to the sole assembly.  The midsole may be held in position during moulding by protrusions moulded on the inner face of the outsole.
Patent GB-181435-A (GB)
Title: An improved oil cup
IPC: F16N7/02
Filed: 1921-03-05
Abstract: 181,435. Copping, G. C. March 5, 1921. Gravity-feed lubricators. - An oil-cup for lubricating the slide bars of a locomotive &c. is fitted with a valve stem l, the lower end of which projects at f and is struck by some moving part to cause the delivery of oil. Spring-backed washers m, n on the valve stem bear against both sides of the bottom of the cup and open in succession the two ends of outlet passages b. c. The oil, which passes through the passages b, c, passes along grooves d, e to the part to be lubricated. The stem l is depressed by a spring s.
Patent GB-1216901-A (GB)
Title: Improvements in catalyst supports designed for increasing the efficiency of heterogeneous catalytic reactions
IPC: B01J35/06
Filed: 1968-02-14
Abstract: 1,216,901. Gas mantles. SOC. NON FANCAISE DU FERODO. 14 Feb., 1968 [16 Feb., 1967], No. 7341/68. Heading B1E. A catalytic material comprises a support made of asbestos based fabric and adapted to be traversed by a combustible gas from an entry face to an exit face of the fabric, the latter carrying a lcatalyst deposit on its entry and exit faces with the quantity of catalyst on the entry face being smaller than the total quantity of catalyst on the exit face. Examples describe Pt-on-asbestos preparations.
Patent GB-567111-A (GB)
Title: Improvements in and relating to electron discharge tubes
IPC: H01J19/42
Filed: 1943-05-10
Abstract: 567,111. Thermionic valves. MULLARD RADIO VALVE CO., Ltd., and HERNE, H. J. L. May 10, 1943, No. 7414. [Class 39 (i)] In an electron discharge tube wherein one electrode 8 is directly carried by supporting wires 2 and 3 which also form its electrical connections, a further electrode 16 is supported from these wires also by means including insulating beads 12 and 13 of thermoplastic material such as glass, the electrical connection to this further electrode being effected by a separate lead-in wire 19. In the example shown, the valve is a diode with a pot-shaped cathode 8 and anode 16. The cathode is provided with a heater 9 which involves a further connection 4. The anode and cathode may be separated by a small space or may be in contact, the emissive oxide coating of the cathode serving to insulate the electrodes from each other. The anode lead includes a blade spring section 18 and is surrounded by a glass bead 23 to facilitate sealing off the tube. A mica disc 20 positions the anode lead in this process.
Patent GB-306297-A (GB)
Title: Improvements in or relating to holding devices for lenses, prisms and similar objects
IPC: G02B7/00
Filed: 1928-03-10
Abstract: 306,297. George, Ltd., W. & J., and Bough, F. P. March 10. 1928. Testing apparatus, auxiliary.-A holding device for lenses, prisms and similar objects comprises a bracket 5, mounted on a support 6, and provided at one end with an upstanding arm 7 to which is pivoted another arm 11 having at its outer end means 12 for engaging the upper surface of a lens or prism. This arm 11 is spring-controlled and ensures that the lens &c. is securely held between the recess 5‹ in the bracket 5 and the eccentrically mounted block 12. For the holding of smaller lens a sleeve 17 on the bracket 5 is provided with a recess 17<a> of smaller dimensions than that of the recess 5a, this sleeve 17 being adapted to slide along the bracket to take the lower edge of the lens &c. when desired. For holding lenses the notches 5a, 17<a>, are made V- shaped.