baber/WOPTO huggingface dataset:
Patent GB-596012-A (GB)
Title: Piezoelectric frequency determining unit
IPC: H03H9/05
Filed: 1945-07-13
Abstract: 596,012. Piezo - electric crystal mountings. STANDARD TELEPHONES & CABLES, Ltd. July 13, 1945, No. 17956. Convention date, July 20, 1944. [Class 40 (v)] A mounting for a piezo-electric crystal comprises an insulating base 1 having contact pins 2 moulded therein and a cover portion 5 formed with a socket 6 for housing the crystal 14 and associated parts. When assembled, base 1 is hermetically sealed to cover 5 with the interposition of an elastic washer 10 and is held either by screws 7 or by polystyrene cement. Flexible contact plates 3 are mounted on the base in electrical contact with pins 2 and between them are placed the crystal 14, electrode plates 15 and a compression spring 16. The contact plates 3 are entered into socket 6 of the cover in engagement with grooves 12 in'the side walls; until the ends of plates 3 are deflected inwards by engagement with sloping ends 13 of grooves, 12 thus compressing the parts into their working position. Ridges 11 and 19 on the cover and base respectively serve to locate the crystal in the assembled position.
Patent GB-275583-A (GB)
Title: Improvements in or relating to optical devices suitable for use in picture telegraphy, television, high speed facsimile telegraphy and the like
IPC: H04N5/66
Filed: 1927-07-07
Abstract: 275,583. Telefunken Ges. f³r Drahtlose Telegraphie. Aug. 6, 1925, [Convention date]. Copying-telegraphs; television. - A light-valve for television or picture telegraphy depends on the fact that light passing through a transparent medium g is unaffected by the interposition of a body k whose refractive index is equal to that of the medium, but is almost completely cut off if there be a slight difference between the refractive indices of the body and the medium. Thus, light from a source s may be collimated and passed to a screen S through a cell g containing a glass sphere k surrounded by a liquid, such as nitrobenzene, whose refractive index is equal to that of the glass except when the latter is stressed by electrical or other means. Thus, electric potentials corresponding to the signals may be applied to the electrodes e', e<2>, so as to set up a slight difference of refractive index with a consequent decrease of illumination. Fluctuating unidirectional potentials are preferred to alternating potentials for this purpose and may be derived from a resistance in the anode circuit of a valve having an alternating grid potential, or a constant biassing potential may be added to a received albernating potential. The sensitivity mav be increased by the use of several of the devices in series in beam of light, or by polarization of the light. Thus two of the devices may be subjected to the effect of mutually perpendicular fields. According to the Specification as open to inspection under Sect. 91 (3) (a) the body subjected to stress may consist merely of a portion of the nitro-benzene or other transparent medium. This subject-matter does not appear in the Specification as accepted.
Patent GB-1353300-A (GB)
Title: Arrangements for controlling a vehicle braking system
IPC: B60T8/1761
Filed: 1972-04-19
Abstract: 1353300 Anti-skid braking systems DAIMLER-BENZ AG 19 April 1972 [21 April 1971] 18144/72 Heading F2F An arrangement for controlling a vehicle braking system comprises pulse transmitters associated with the wheels, the pulses of which are processed and if necessary combined with one another by a downstream switching arrangement, to form signals corresponding to upper and lower acceleration and deceleration thresholds which act on control arrangements in the pressurized medium circuits of the wheel brakes in such a way that the pressure at the wheel brakes is built up, maintained or released, and means are provided for controlling the resumption of pressure build-up, together with means for influencing the pressure build-up, a time delay being provided by a time element 13 for controlling the resumption of pressure build-up, after the appearance of a signal corresponding to an upper or second deceleration threshold and a master transmitter 6 is provided which influences pressure build-up and which responds with a pulse when a signal is applied to its input, causing a rise in pressure. In a control system shown in Fig. 1 the part framed in dash-dotted lines is common to the whole braking system and the rest of the circuit is required for each wheel to be regulated. By means of pulse transmitters (not shown), for example frequency generators and electronic switching arrangements included in the outputs, the required signals for wheel slip and the acceleration and deceleration thresholds are obtained and fed to the circuit. In an embodiment a master transmitter 6, Fig. 2, has an operational amplifier 23 which is so connected that it acts as an astable multivibrator. Pulse duration and pulse spacing are achieved by recharging of a capacitor 24 with different time constants, in the direction of the relevant output voltage. If the relevant partial voltage which is dependent upon the output voltage is exceeded at the positive amplifier input by the capacitor potential, then the output voltage is moved into the other condition. If a negative potential is present at the input of the master transmitter 6, then the capacitor 24 remains discharged until a positive potential is again present at the input and blocks a diode 28. Since the initial charging of the capacitor 24 takes place after arrival of the input signal through a diode 25 and a resistance 26, and since only half the re-charging voltage has to be attained, then the pulse rise at the output starts almost immediately on arrival of the input signal.
Patent GB-241989-A (GB)
Title: Improvements in metallic packing for stuffing boxes
IPC: F16J15/28
Filed: 1924-07-30
Abstract: 241,989. Mellor, J. July 30, 1924. Drawings to Specification. Joint-making packing.- A packing ring comprises a copper or lead &c. tube with interfiting ends and filled with fibrous material.
Patent GB-1471826-A (GB)
Title: Brake valve for a motor vehicle brake system
IPC: B60T8/74
Filed: 1975-05-01
Abstract: 1471826 Inertia sensitive proportioning valve FORD MOTOR CO Ltd 1 May 1975 [30 May 1974] 18179/75 Heading F2F  A vehicle brake valve has a proportioning piston 54, between an inlet 23 and a rear brake outlet 49, which is effective above an inlet pressure which is determined by a modulating piston 42 subject to the inlet pressure in a chamber 44 communicating with the inlet 23 by way of a valve which is closed on vehicle deceleration above a predetermined rate by a valve element 32 on a linearly movable weight 26.  The proportioning piston 54 has a small head 81 sealingly engageable at 88 (Fig. 3) with a resilient seal 76 and a large head non-sealingly engageable with crenallations of the seal 76 and the leftward net fluid pressure on the piston 54 is opposed by the force of a spring 59 which is movable by the modulating piston. The modulating piston is urged leftwards by a spring 66 to delay opening of the proportioning valve to compensate for dead time or lag in the braking system to prevent premature wheel lock and a flow restriction 41 is provided between the inlet 23 and the chamber 44 to avoid sensitivity to spike or sudden brake application. In use (Fig. 8) the outlet and inlet pressures are initially equal (89-90), then the outlet pressure increases slower than the inlet pressure (90-91) as the piston 54 seats against the seal 76 in opposition to the spring 59. At 91 increasing inlet pressure in the chamber 44 displaces the piston 42 against the force of a spring 66 opening the proportioning valve again and from 92 to 93 the inlet and outlet pressures are again equal until, e.g. 0À4 G deceleration is reached when the weight 26 closes the valve 32 and the outlet pressure again rises slower than the inlet pressure. When the vehicle is unladen the valve 32 closes at 0À49 at 91 and at intermediate loads the pressure characteristic in Fig. 8 is parallel to and between the lines 91-95 and 93-94.
Patent GB-903970-A (GB)
Title: A bending machine for metal bars
IPC: B21D7/022
Filed: 1959-05-28
Abstract: 903,970. Bending rods. PEDDINGHAUS, P. C., and PEDDINGHAUS, W., [trading as PEDDINGHAUS, P. F.]. May 28, 1959 [May 28, 1958; Jan. 7, 1959], No. 18185/59. Class 83 (4). A machine for bending rods in which, in operation, a pivoting pawl is used to connect a movable abutment with a rotor so that the abutment rotates forcing the rod against the convex face of a former until the pawl is disengaged by an adjustable stationary abutment, and the abutment is returned to its starting position. Concrete reinforcing rods, guided by an adjustable plate 14, are bent around a roller 13 by a member 10, adjustable radially, on a bending arm 7 rotatable around the axis of the roller 13. The arm 7 is normally held back against a stop, not shown, by a spring or weight loaded belt 8. The bending operation is started by depressing a pedal 22 to rock a lever 20 carrying a yielding trip 23 to rock a hooked lever 9 pivoted on the bending arm 7 so that the hook is engaged by a notch 6 in a coupling plate 5 rotated above a working table 2 of a housing 1 by drive means 3 in the housing 1. The coupling plate 5 thus entrains the bending arm 7 to bend the rods around the roller 13 until the lever 9 is disengaged from the plate 5 by its engagement with a roller 27, or 27a, adjustable on a plate 25, or 25a, adjustably positioned in holes 24 in the table 2. A roller 28 fixed to the table 2 acts as a safety device to disengage the lever 9 if, inadvertently, the rollers 27 and 27a are absent. In another embodiment, Fig. 4, the rollers 27, 27a are replaced by sector-shaped rollers 31, 31a turned simultaneously by an arcuate rack 33 so that the circular part of one roller is moved into, while the circular part of the other roller is moved out of, operative position. The rack may be adjusted by a lever 35 or by rotating one of the rollers by a rod 34.
Patent GB-928144-A (GB)
Title: Improvements in or relating to container type applicators
Inventor: HOWELL BRIAN GORDON
IPC: B65D47/42
Filed: 1961-05-18
Abstract: 928,144. Injection moulding. METAL BOX CO. Ltd. Jan. 17, 1962 [May 18, 1961], No. 18195/61. Class 87(2). [Also in Group XXIII] In a reservoir pad applicator, the attachment of the pad to a container, or to a holder for supporting it on a container, is effected by contacting one face of the pad with the molten surface of the container or holder during injection moulding of this part. Preferably, a low density polyethylene holder is moulded in the space between a fixed tool 16 and a movable tool 17. The tools are initially separated, and piston 21 is withdrawn into shield 20, to allow a foamed polyurethane pad 5 to be placed within the shield 20. After bringing the tools together, the piston 21 is advanced to compress the pad 5 between walls 8 and 24. Molten plastic is injected against the pad from four nozzles 18 and forms the ring-shaped holder 7. When the movable tool 17 has been withdrawn (allowing pad 5 to expand) stripper element 23 removes the holder 7 from the fixed tool 16. For holders of more rigid material, annular projection 12 may be modified or replaced by a screw-thread.
Patent GB-402508-A (GB)
Title: Improvements in, or relating to, electrical heaters for use in cooking stoves, boiling-plates, and the like, and for analogous purposes
IPC: H05B3/68
Filed: 1932-06-28
Abstract: 402,508. Electric hot-plates. GILBERT, N. W., 513, Warwick Road, Solihull, Warwickshire. June 28, 1932, No. 18207. [Class 39 (iii).] In an electric heater such as a boiling-plate c the current supply leads d from a step-down transformer are led through a water tank e in order to prevent heat being conducted along the connections to the transformer. The hot plate c may be a double grid as described in Specification 398,810. The tank e may be provided with supply and delivery connections so that the heated water can be used for domestic purposes.
Patent GB-146297-A (GB)
Title: Improvements in valve mechanism for internal combustion or steam engines
IPC: F01L7/02
Filed: 1920-07-02
Abstract: 146,297. Davison Motor Co., (Assignees of Davison, D. A.). Dec. 13, 1915, [Convention date]. Valves; valves-gear.-A rotating ring valve 20, split preferably through the port 21, is driven by teeth 22 on a rotating sleeve 8 between the cylinder and piston, the teeth being formed so as to permit free expansion of the valve. When the cylinder head is removed, the valve may be turned relatively to the liner and adjust the timing. The sleeve 8 is mounted on ball-bearings 13, 14, 15 and provided with packing-rings 16, 17. In a horizontal engine, a packing-ring is provided in the sleeve near the teeth 22.
Patent GB-650078-A (GB)
Title: Improvements in means for driving winding spools for wire and the like
IPC: B21C1/12
Filed: 1948-07-07
Abstract: 650,078. Control of D.C. motors. SOMERVILLE, T. B., and MARSHALL RICHARDS MACHINE CO., Ltd. July 7, 1948, No. 18326. Addition to 620,018. [Class 38(iii)] A wire drawing machine driven by an A.C. induction motor is provided with a D.C. motor to drive the spool, the armature of this D.C. motor being supplied from a winding of the A.C. induction motor through a full wave rectifier so that the currents in the two motors bear a constant ratio to one another. The wire drawing machine is driven by an induction motor 1, the stator windings 2 of which are connected to the armature 7 of a D.C. motor 5, driving the spool, through full wave rectifier 8. The separately excited field 6 can be regulated so that the spooling tension may be adjusted. In order to allow an adjustable spooling tension to be applied before the machine is started there is provided a circuit comprising variable impedances in parallel with the stator windings 2. Alternatively the D.C. motor may be fed from the rotor windings of the machine driving motor. A tapped transformer may be interposed between the motor and the rectifier and the motor may have a regulable series field to allow further variation of the spooling tension.
Patent GB-1090771-A (GB)
Title: Coin dispenser
IPC: G07D1/08
Filed: 1963-05-08
Abstract: 1,090,771. Coin dispensers. W. H. A. LUCAS. Aug. 4, 1964 [May 8, 1963], No. 18269/63. Heading B8P. A coin dispenser comprises a magazine divided into compartments of different widths by partitions 9, 10, 11, the bottom of each compartment having an aperture 5 ... 8 and providing a ledge or ledges 1 ... 4 on which the bottom coin in the compartment rests, and has a cover 25 for the top and/or front of the compartments, with slots 29 ... 32, so that when the cover is in place, and secured by projections 27, 28 engaging in slots 14, 15, a coin from any compartment can be slid forward through its slot by a fingertip applied through aperture 5 ... 8. Compartments for the smaller denominations of coins may have true or false backs 35 forward of the back of the dispenser. A spring in each compartment prevents the coins from rattling. The dispenser may be constructed from sheet material, or moulded in synthetic plastics.
Patent GB-460515-A (GB)
Title: Improvements relating to insulated electric cable conductors
IPC: H01B9/06
Filed: 1935-06-26
Abstract: 460,515. Cable reels. OKONITECALLENDER CABLE CO., Inc. June 26, 1935, No. 18304. Convention date, Aug. 11, 1934. [Class 99 (ii)] [Also in Group XXXVI] A cable is transported on a reel the drum O of which is sealed by solder or a heavy gasket P to a metal lining N. Metal lagging R surrounds the cable wound on the drum and is sealed by compound S to the metal lining N. The metal lagging is surrounded by wooden lags T.
Patent GB-335203-A (GB)
Title: Non-alkaline chlorate weed killer
IPC: A01N59/00
Filed: 1929-06-14
Abstract: 335,203. Chipman, R. N. Dec. 22, 1928, [Convention date]. Weed-destroying compositions.-The herbicidal efficiency of chlorate weed killers is increased by rendering them neutral or acid by the addition of acids, acid salts, or salts which have an acid reaction. The addition of the acid-reacting substances must not be sufficient to cause liberation of chlorine from the chlorate solution. Acids specified are hydrochloric, sulphuric, nitric, boric, oxalic, and tartaric, acid salts, sodium acid sulphate, potassium acid tartrate, and monocalcium phosphate, and acid-reacting salts ammonium, aluminium, ferric, copper, and zinc chlorides, sodium bichromate, and sodium ferrosilicate. Solutions of sodium, potassium, and calcium chlorates are referred to. The Specification as open to inspection under Sect 91 (3) (a) refers to the use, as acid-reacting substance, of mercury chloride. This subjectmatter does not appear in the Specification as accepted.
Patent GB-408196-A (GB)
Title: Improvements in or relating to hydraulic engines
IPC: F03C1/10
Filed: 1932-06-29
Abstract: 408,196. Self driving machines. JANSSENS, C., 1, Rue du Pois, Antwerp, Belgium. June 29, 1932, No. 18419. Void [Abridged as open to inspection under Sect. 91 of the Acts, July 2, 1932]. Drawings to Specification. [Class 10.] A self-driving hydraulic engine comprises an opposed pair of cylinders with connected pistons driving a crank-shaft which is geared to a second shaft carrying cams which oscillate pivoted cam levers operating groups of pumps by which oil or other liquid is forced alternately into each cylinder.
Patent GB-578597-A (GB)
Title: Improvements in or relating to systems for transmitting guided electromagnetic waves
IPC: H01P5/08
Filed: 1943-11-05
Abstract: 578,597. Wave guides. WESTERN ELECTRIC CO., Inc. Nov. 5, 1943, No. 18433. Convention date, July 30, 1942. [Classes 40 (iii) and 40 (v)] A wave guide band filter comprises two or more shunt reactors spaced longitudinally in the guide, with one or more variable reactors interposed between them. The shunt reactors may comprise transverse apertured partitions and the variable reactor may be inductive and formed as a deformable ring, or capacitative and formed as probes aligned in the direction of the electric vector. Fig. 6 shows a filter for a rectangular guide 1 comprising two apertured partitions 38, 39 with their slots B, C parallel to the electric vector E, each functioning as an inductive reactance. The variable capacity reactance comprises screwed probes 30, 31. For narrow bands, the spacing A is a multiple of half a wavelength; and for wider bands may approach an odd multiple of a quarter wavelength. The band-width is also dependent on the slot widths B, C which may be given different values for impedance matching. The guide and the partitions may be of brass or other good conducting alloy with welded or soldered joints, and the inner surfaces may be silver-plated. The guide may be of circular section, Fig. 8, and two or more filter sections may be arranged in series. The partitions shown comprise circular discs 73 .. , 75 with central apertures, and the interposed variable reactors comprise metal rings 35 deformable by radial screws 30, 31. The filter may have two peak frequencies, the separation between them decreasing as the aperture in the middle partition 74 is decreased. The valley between the peaks may be filled in by increasing the apertures of the end partitions 73, 75 accompanied by an adjustment of the screws 30, 31 to maintain the same mid-band frequency. Fig. 10 shows a branching filter for separating waves into different channels on a frequency basis. Each filter is of the two-chamber type communicating with the main guide 115 by an entrance aperture. The guide may be terminated at T by a metal plate or one of the filters 116 may be connected to the end of the guide. The respective guides 117 ... 120 join the main guide at points which are voltage anti-nodes of the standing wave for the particular frequency they are designed to select.
Patent GB-1419738-A (GB)
Title: Ellipsometer
IPC: G01B11/06
Filed: 1974-04-26
Abstract: 1419738 Ellipsometer INTERNATIONAL BUSINESS MACHINES CORP 26 April 1974 [25 June 1973] 18476/74 Heading G1A [Also in Division G2] Apparatus for measuring characteristics of a sample, such as film thickness or refractive index, by sensing changes in the state of polarization of light reflected from the sample surface, utilizes an angle encoder monitoring the rotation of a polarizing element on the reflected beam path and an analog-to-digital converter receiving the outputs of the encoder and of the detector monitoring the reflected beam intensity, thereby to identify the angles at which minimum intensity occurs. The optical apparatus, Fig. 1, includes a monochromatic source e.g. a HeNe laser, a polarizer 12, oriented at a known angle with respect to the incidence plane, and optionally a quarter wave plate 14. For most film thicknesses, the latter is absent and the polarizer is mounted at 45 degrees. For very thin films, the polarizer is at 12 degrees and the compensator plate 14 is at 90 degrees, Figs. 9, 10 (not shown). A suitable holder for either of these elements is described, Fig. 11 (not shown). The incident beam pauses via spotdefining aperture on to the sample 20 and is reflected to pass via aperture 24 and spinning analyzer 26 to a photo-multiplier 28. The angle shaft encoder produces a pulse for equal small fractions of each revolution, which pulses are fed with the detector oscillating which samples the detector signal at waveform output to the A/D converter the resistants of said pulses, so as to provide a digital signal suitable for Fourier transform analysis by a computer which correlates the polarization changes produced by the sample with the physical property thereof under investigation. The computer output is type-printed out with information such as azimuth (orientations of the polarizing elements), ellipticity &c. and the physical property values. Alternatively, storage CRT or digit-tube display is possible. In order to ensure that the sample surface is accurately located at the intersection of source and detector axes and also positioned so that the fact that the sample is not absolutely flat or is wedge-shaped (sample "tilt"), does not adversely affect measurement, the sample is mounted on a support, Fig. 8 (not shown), whereby it may be adjusted about two perpendicular axes. The reflected light beam is collected by a quadrant array of light fibre guides 67-73, Fig. 7, and fed to two photo-cell pairs 100-106 which sense offcentre and control servomotors 116, 118 to compensate this. The fibre guide array has a central aperture 75 to allow the beam to pass to the photo-multiplier. If the sample is not of standard height, the angle of incidence will be different and has to be calculated for use in the analysis; alternatively a height adjustment is provided in the sample support structure.
Patent GB-627224-A (GB)
Title: Improvements in heat exchangers
IPC: F28D17/02
Filed: 1946-06-20
Abstract: 627,224. Moulding heat exchangers. POWER JETS (RESEARCH & DEVELOPMENT), Ltd., and COHEN, H. June 20, 1946, No. 18636. [Class 87 (ii)] [Also in Group XIII] Relates to heat exchangers of the regenerator type comprising a matrix of refractory material with passages for the alternate flow of hot and cold fluids as the exchanger is rotated through the hot and cold media. According to the invention, a strip of ceramic material provided with ridges is wound to form a matrix having a plurality of superposed layers so that the ridges define passages traversing the matrix. A plastic mass 4 of ceramic material is passed between oppositely rotating rollers 6, 7 to form a strip 5. A gauze strip 9 is simultaneously fed to the rollers from a roll 8 so that the ceramic strip 5 is backed with gauze. The composite strip 5 is then passed through a press 10 which forms a series of parallel ridges 2 on the strip. The strip 5 is dried by passage through a heater 11 and then wound on a core 12. When sufficient layers have been wound the strip is cut, the assembly is then fired and the core 12 removed, the gauze layer having been burnt off in the firing process. A thermo-plastic ingredient may be incorporated in the ceramic material to facilitate winding. The ridges may be formed by passing the strip through two rollers one of which is provided with flukes or projections.