baber/WOPTO huggingface dataset:
Patent GB-534603-A (GB)
Title: Wave filters
IPC: H03H7/42
Filed: 1940-03-29
Abstract: 534,603. Impedance networks; transformers. STANDARD TELEPHONES & CABLES, Ltd. March 29, 1940, No. 5685. Convention date, June 2, 1939. [Class 40 (iii)] [Also in Group XXXV] In a filter of the balanced type comprising two or more sections 5, 6, Fig. 1, in tandem, the capacity unbalance is reduced by the connection of one or more condensers in series or diagonal between the input and output terminals. The stray capacities may be represented by a lattice network, Fig. 2, which may be so balanced that an E.M.F. applied across the input terminals will produce no output current if the product of the series capacities is made equal to the product of the diagonal capacities. This is done by the addition of a single condenser CA, CB or CC, Fig. 1, of suitable value. To balance for longitudinal currents, however, it is necessary either to make all the capacities of the lattice equal, in which case all three condensers CA, CB, CC are required, or to make the capacities such that the unbalanced voltage to ground at the input end is equal to but 180 degrees out of phase with that at the output end, which result may be obtained by the use of only two condensers CA, CB or CA, CC. In the two-section filter shown in Fig. 3, having a differential transformer T1, T2, at each end, the transmission through the piezoelectric crystals X1, X2 is balanced against that through the condensers C1, C2 for all frequencies outside the pass band, the balance being improved by the additional condensers CA, CB as in Fig. 1. The transformers T1, T2 allow the filter to be connected between unbalanced circuits, and they are tuned to the mid-band frequency by the provision of shunt capacities C3- C6. In order to correct for inductive unbalance, the couplings between the single winding W3 and the balanced windings W1, W2 are adjustable simultaneously in opposite senses, and preferably in addition the coupling between W3 and W1, W2 in series is adjustable. In the construction shown in Fig. 4, the winding W3 is carried by a tube 21 which is angularly adjustable in a circular slot 28 in a slide 22, and the latter is movable in longitudinal grooves within a tube 20 on which the balanced windings W1, W2 are wound.
Patent GB-1048464-A (GB)
Title: Improvements in pressure relief valves
IPC: F16K1/30
Filed: 1964-02-11
Abstract: 1,048,464. Valves. R. J. V. HARMAND. Feb. 11, 1964 [Feb. 12, 19631, No. 5720/64. Heading F2V. A pressure relief valve 1, Fig. 2, is mounted on a cock by the threaded parts 7, 9 and upon opening the cock gaseous fuel flows into a highpressure chamber 20 via bores 21, 24; fuel escapes from the chamber 20 into an intermediate chamber 31, through spring-opened valve 36 so deflecting a diaphragm 57 which through a lever 47 moves the valve 36 towards its seat 35 so effecting a pressure reduction. This pressure is transmitted through a conduit 60, an orifice 61 to a chamber 63 where it traverses a calibrated jet 82 the bore 81 of a spring closed valve 66 and a spring-opened valve 91 to deflect another diaphragm 115 and through a lever 105 moves the valve 91 towards its seat 94 and opens a further valve 66 to thereby produce a further pressure reduction. The flow to the valve outlet 97 is controlled by valve 66. Both valves 36 and 91 have triangular bearing surfaces 38, 95, the former ensuring the valve 36 is balanced. The spring 65 which is common to valves 91, 66, is adjustable and is matched with the jet 82. The space between the diaphragms is vented to atmosphere. In a modification, the valve 1, Fig. 6, is connected to the fuel bottle or tank 120 by an extension 140. Upon moving a slide valve 162 to the dotted-line position a part 170 opens to the chamber 20, Fig. 2; concomitantly, a rod 150, Fig. 6, is thrust inwardly via a ball 160 to unseat a valve in a body 126, whereby fuel may flow from the tank 120 to the chamber 20. The valve 162 may be operated through a flexible cable. The relief valve may be permanently connected to the tank and be adapted to admit of filling the latter. In another modification, fuel flows into the high-pressure chamber from a bottle via a camactuated valve 183, Fig. 12, opposed to which is a similar valve 184 through which the bottle is filled. A manually-operable rod. 229 may also be provided to prevent more than a given movement of valve 91 towards its seat so that valve 91 imposes little if any pressure reduction of the fuel passing therethrough.
Patent GB-243588-A (GB)
Title: Improvements in or relating to fluid pressure operated brake mechanism for motor vehicles
IPC: B60T13/16
Filed: 1925-03-03
Abstract: 243,588. Godeau, F. L. March 3, 1925. Fluid-pressure.-The pedal operating the lever brake mechanism of motor-vehicle brakes is adapted, in its initial movement, to operate a hollow slide valve controlling a pressure fluid brake, the arrangement being such that a graduated application and release of the brakes may be obtained. The pedal 1, Fig. 1, actuates the brake lever 10 through a spring 28, and a link 5 thereon actuates an arm 4 pivoted on a lever 2 and connected, by a rod 8 to the hollow slide valve 11 of the pressure-fluid brake, which comprises a gear pump 16, driven from the lay shaft of the gear box or otherwise, and adapted to force oil from a tank 15 through a passage 33 to the slide valve chamber 12. With the slide valve 11 in valve chamber 12. With the slide valve 11 in the release position shown, the oil is returned to the tank by the passages 17. 20, 22, but when in a brake application, the slide valve is moved to the left, the passages 20, 22 are thrown out of register, and the passage 19 registers with the passage 23 so that the brake cylinder 13 is supplied with fluid and the piston 14 moves out to add pressure to the brakes through rods 24, 25, the lever 2, rod 9, and lever 10. The movement of the lever 2 rocks the arm 4 to move the slide valve to a mid position in which all its passages are blanked, the oil pumped into the passage 33 being then returned to the tank through a valve 30. By repeatedly operating the slide valve to connect the passages 19, 23 and allowing the resulting movements of the lever 2 to return it to mid position, the driver may develop the braking effort gradually. When the driver releases the pedal, the slide valve returns to release position so thar the brake cylinder exhausts through passages 18, 21, and tho oil again circulates through the passages 33. 17, 20, and 22. The movement of the peda,l necessary to operate the slide valve brings an adjustable stop 6 into contact with the lever 2, so that if the pressure brake fails to act, the continued movement of the pedal will apply the brakes directly both through the spring 28 and the lever 2, the rod 25 then sliding over the rod 24. Fig. 4 shows an arrangement wherein the movement of the pedal is opposed by pressure transmitted from the cylinder 13 to a sleeve cylinder 34 in which works a piston 35 connected to the pedal by a rod 36. The pressure exerted on the sleeve cylinder is transmitted to the tail rod C of the piston 14 by means of a rod A and lever B.
Patent GB-183173-A (GB)
Title: Improvements in or relating to the employment of smoke producing compositions for military and pyrotechnic purposes
IPC: C06D3/00
Filed: 1921-02-21
Abstract: 183,173. V.M.L. Experimental, Ltd., (formerly M.L. Experimental, Ltd.), and Johnson, F. G. L. Feb. 21, 1921. Pyrotechnic compositions.-Consists in making smoke-producing compositions in the form of pellets or tablets of predetermined size, so that when the composition is placed in a container, such as a shell, bomb, rocket, or smoke-screen apparatus, a large surface is provided for the ignition and smoke production. The size of the pellets or tablets is determined by the nature of the composition and the rate at which it is desired to produce the smoke.
Patent GB-765418-A (GB)
Title: Torque transmitting coupling
IPC: F01D5/02
Filed: 1955-03-01
Abstract: 765,418. Gas turbine plant. McCULLOUGH, A. L. March 1, 1955 [March 8, 1954], No. 6027/55. Class 110 (3). [Also in Group XXIV] A shaft coupling for the compressor and turbine shafts of a gas turbine engine adapted to provide for accurate axial adjustment thereof, comprises a hollow shaft 12, 13 adapted to be secured by a flange 11 to the turbine shaft and connected through a toothed coupling 14, 15 to a flange 10 of the compressor shaft. Secured to the hub 10 also is a tension-rod 16 having a screw-threaded end 21 engaging a complementary screwed sleeve 20 which has a flange 22 clamped by bolts 24 between the end 12a and a ring 23 of the hollow shaft portions 12, 13 respectively. The end of the tension rod 16 also has a splined portion 29 which is locked to a splined portion 28 of sleeve 20 by means of a double splined ring 30 which is normally held by a spring 33 against a snap-ring 34 on the rod 16. To effect an axial adjustment of the shafts, the bolts 24 are slackened off to free the flange 22 of sleeve 20 and an externally splined wrench is inserted through the turbine end of the hollow shaft 12 to engage the splines 28 of sleeve 20. Axial movement of the wrench disengages locking ring 30 from splines 28 and allows the sleeve 20 to be rotated and moved axially along the tension-rod 16, the toothed coupling 14, 15 allowing such movement. After the required adjustment the wrench is removed to allow ring 30 to re-engage splines 28 to lock the rod and sleeve, and the bolts 24 are tightened to clamp the flange 22 of sleeve 20. Securing pins 27 may also be provided between the flange 22 and hollow shaft 13.
Patent GB-1501086-A (GB)
Title: Wheel alignment testing apparatus
IPC: G01B11/275
Filed: 1974-02-09
Abstract: 1501086 Measuring vehicle wheel alignment DUNLOP Ltd 3 Feb 1975 [9 Feb 1974] 6033/74 Heading G1X Wheel alignment testing apparatus comprises two elongate members 1, 2 which, in use are mounted in a horizontal plane by legs 4 so as to be each aligned with one of a pair of vehicle wheels, a beam 14 pivotally mounted at one end to member 1 so as to pivot about a vertical axis, and optical alignment indicating means which anables the beam 14 to be aligned accurately parallel with member 2. Said alignment indicating means is moved by an adjustment member 16 mounted on member 1 and comprises a measuring unit in engagement with the beam 14, the member 16 being positionable at any required distance from the pivotal axis of the beam 14. The unit includes a scale and a reference marker for indicating the transverse distance through which the beam 14 moves from a first position where it is parallel to member 1 to a second position where it is parallel to member 2. The optical alignment indicating means may comprise a mirror 13 mounted in a vertical plane on member 2 and a sight mark 20, a periscope 15 and a datum line 17 which are mounted for movement with the beam 14. The reflected image of the sight mark 20 is viewed in the periscope, the beam 14 being moved by the adjustment member, alignment of the reflected image of the mark 20 with line 17 indicating that the beam 14 is parallel to the member 2, beam 14 being preferably spring- biased towards said first position. The adjustment member 16 may comprise as shown, an eccentrically mounted circular cam the periphery of which abuts the beam 14, the amount of rotation being determined by a scale on the cam and a pointer. Alternatively the transverse movement of the beam may be effected by a micrometer screw gauge type member, Fig. 5, (not shown). The member 16 is moved along a scale 27 on member 1 to a position corresponding to a figure for the diameter laid down by the vehicle manufacturer, so that scale 27, 41 gives the toe-in or toeout directly, which terms are usually expressed in terms of the difference in distance, transversely of the vehicle, between the two leading edges of the wheel and the two trailing edges for said given diameter.
Patent GB-1274783-A (GB)
Title: A machine for processing tea leaf
Inventor: BARBORA DHIRENDRA NATH
IPC: A23F3/12
Filed: 1970-02-09
Abstract: 1,274,783. Tea processing machine. TEA RESEARCH ASSOCIATION. 9 Feb., 1970, No. 6108/70. Heading A2B. A machine for processing tea leaf comprises a stationary cylinder 1 closed at one end 2 and open at the other, enclosing a feed worm 4 mounted on a rotatable shaft 5, and a stationary sleeve 6 adjustably fitted at the open end of the cylinder, for example by screw thread 12 and nut 13, to enclose a conical or frusto-conical attachment 7 on an extension of the shaft 5, the open end of the sleeve 6 being supported at two sides by two support lugs 8 mounted on cylinder support bars 9 and locked in position by locking nuts 10.
Patent GB-128880-A (GB)
Title: Improvements in Nut Locks.
Inventor: MASEYK ARTHUR ERNEST WILLIAM
IPC: F16B39/36
Filed: 1919-03-12
Abstract: 128,880. Maseyk, A. E. W. March 12, 1919. Locking nuts.-The two parts 1, 4 of a divided nut have an eccentric spigot 2 fitting into an eccentric socket 3, and are normally separated by a space 11 slightly exceeding half the pitch of the thread. The parts are bevelled at 6, 7 to accommodate a split ring 8 formed at one end with a tooth 9. After the part 4 has been screwed home, the part 1 is given rather more than half a turn extra, which brings the faces into contact and forces the tooth 9 into the thread of the bolt. The toothed ring 8 may he omitted.
Patent GB-345781-A (GB)
Title: Improvements in or relating to acceleration control of electric motor driven devices
IPC: H02P1/16
Filed: 1930-02-24
Abstract: 345,781. Electromechanical power transmission systems. IGRANIC ELECTRIC CO., Ltd., 147, Queen Victoria Street, London.-(Cutler Hammer Manufacturing Co. ; Milwaukee, Wisconsin, U.S.A.) Feb. 24, 1930, No. 6130. [Classes 35 and 38 (iv).] Equalizing load on generator; driving-arrangements.-The load on an electric motor driving through an electromagnetic friction clutch is prevented from exceeding a predetermined value. A relay 13 in series with the motor circuit removes the short circuit on a resistance 27 in the clutch field circuit when the load current is excessive and the clutch continues to accelerate the load at a reduced rate. As shown this is effected by a relay 20 controlled by the relay 13. After starting the motor 8 the clutch 10 is energized by the push-button switch 31 to start the load 7, the solenoid 30 then closing the clutch field circuit and a retaining circuit for itself through a second push-button switch 35.
Patent GB-818526-A (GB)
Title: Artificial flowers
IPC: A41G1/00
Filed: 1956-02-28
Abstract: 818,526. Artificial flowers. SPEAR, J. R. Feb. 28, 1957 [Feb. 28, 1956], No. 6192/56. Drawings to Specification. Class 63 A method of making an artificial flower consists in preparing a piece of material, e.g. felt in the shape of a bloom, making an aperture therethrough, passing through the aperture one or more threads each having on one end plastic material such as wax or clay to represent stamens or pistils, covering the parts of the thread which have passed through the aperture with adhesive and inserting them into the end of a flexible tube e.g. of polyvinyl chloride, to form the stalk whereby some of the adhesive is driven up the threads to meet the underside of the flower and cause the latter to adhere to the end of the tube. The stamen ends may be made by dipping the threads into wax or clay and the flower may be cut out from felt, slit and stitched to form a concave flower bent up around the stamens. Another piece of felt cut to the shape of a leaf or leaves may be formed with a portion which is stitched around the stem. The various parts and materials used may be made up into a flower making toy set.
Patent GB-725173-A (GB)
Title: New phenthiazine compounds and process for their preparation
Filed: 1953-03-05
Abstract: The invention comprises a phenoxy-substituted phenthiazine wherein the phenoxy substituent is in the 1- or 3-position (Beilstein nomenclature).  These compounds are obtained by reacting m-phenoxydiphenylamine with sulphur, preferably in the presence of iodine and at a temperature above 150 DEG  C., more particularly at about 175-190 DEG  C.  The isomers can be separated by fractional crystallization, e.g. from a mixture of benzene and cyclohexane.  An example is given.  The products can be used as starting materials in the process of Specification 725,172.  The m-phenoxydiphenylamine is obtained by decarboxylation of 3-phenoxy - 21 - carboxydiphenylamine, which is obtained by reacting o-chlorobenzoic acid with 3-phenoxyaniline.
Patent GB-562306-A (GB)
Title: Improvements in electron beam deflection valves and circuits therefor
IPC: H01J25/78
Filed: 1941-05-07
Abstract: 562,306. Beam deflection valves. COSSOR, Ltd., A. C., JOFEH, L., and WILLIAMS, B. C. FLEMING-. May 7, 1941, No. 6195/42. Divided out of 560,689. [Class 39 (i)] In a beam deflection valve the deflecting plates 1, 2 are integral with the target electrodes 4, 5. As shown in Fig. 1, the plates and electrodes are formed in a block 9 constructed as a hollow resonator, with load loop 10 ; a grid 6 prevents secondary electron flow between the targets. In another form, the electron beam 3, Fig. 2, is directed against the upper end only of the combined plates and targets 21, 22 and 23, 24 ; one of the latter has a bent extension 27 overlapping the returned end of the other target. The plates 21, 22 are short-circuited at their lower end by a plate 28 and are of a length to form a quarter wave resonator ; the output leads 31 are connected a short way along the plates. In a mixer circuit, the two oscillations are connected to deflector plates 35, 38, Fig. 3, in sequence, the target 41 being integral with the plate 41 ; intermediate frequency is taken from the target 42. Valves as described in Specification 560,689 having curved deflector plates may also be constructed as described above.
Patent GB-1089921-A (GB)
Title: Improvements in or relating to systems for generating modulated electric waves
Inventor: BIRT DAVID ROBIN
IPC: H03C1/00
Filed: 1965-02-12
Abstract: 1,089,921. Amplitude modulation; pulse modulation circuits. COMMUNICATIONS PATENTS Ltd. Jan. 25, 1966 [Feb. 12, 1965], No. 6224/65. Headings H3R and H4L. In an amplitude modulation arrangement the current flow in the output stage is controlled by a pulse train width modulated by the modulating signal providing an output carrier signal at the fundamental or harmonic frequency of the train amplitude modulated by the modulation signal. The output stage includes load 14, a circuit 15, 16 tuned e.g. to the pulse recurrence frequency, a valve 10 connected in series with the circuit across the power supply and a valve 11 connected across the tuned circuit and load. Width modulated pulses are applied via amplifier 19 to the grid of valve 11 and via transformer 21 and bi-stable circuit 20 to the grid of valve 10, these pulses act to switch valve 10 into conduction during the on period of each pulse and valve 11 into conduction to complete the circuit across the tuned circuit and load during the period between pulses. The tuned circuit selects the fundamental component at the pulse train frequency which has an amplitude which is a sine function of the pulse width, by arranging the width modulating circuit so that the pulse width is an inverse sine function of the amplitude of the modulating signal the output circuit produces a carrier signal having an amplitude linearly related to the modulating signal. The width modulation circuit, Fig. 2, includes a master oscillator 30 providing a square wave output and two sine wave outputs leading or lagging the square wave signal by 90 degrees. The two sine wave signals are rectified in valves 34, 35 and the resulting half cycles are added to the square wave output in the grid circuit of pentode 42 which supplies the output signal shown in Fig. 3, which includes the two quarter cycle sloping flanks S1, S4. This signal is applied with the modulating signal to the input of valve 57 which conducts heavily when its cut-off bias is exceeded, this cut-off bias is set by the modulating signal e.g. line L-L<SP>1</SP>, Fig. 3, and determines where on the flanks S1 and S4 the valve conducts and cuts off and hence the width of the output pulse which bears an inverse sine relationship to the amplitude of the modulating signal. The width modulated pulse is further limited by valve 67 and diodes 68, 69 before application to the amplifier 19.
Patent GB-105954-A (GB)
Title: Improvements in or relating to Variable-speed Gear-trains for the Transmission of Power.
Inventor: ZWEIGBERGK GILLIS VON
IPC: F16H61/02
Filed: 1916-05-01
Abstract: 105,954. Zweigbergk, G. von. May 1, 1916. Variable-speed and reversing gearing for motorvehicles &c. comprises two epicyclic trains in series, each being controlled by a plate clutch which is operated in one direction by the power of the driving or driven shaft through the medium of a magnetically-operated plate clutch and a screw. An epicyclic train E, E<1>, E<4> transmits power from a driving-shaft A to a hollow shaft G connected to the planet carrier E<3>. In the position shown, a plate clutch F connecting the planet carrier to the annulus E<4> is disengaged and the speed is reduced. The annulus is held against rotation by a member F<3> in toothed engagement with a magnet carrier D, and the electro-magnet D<1> is energized, a plate clutch C being thereby released. To transmit the full speed of the shaft A to the shaft G, the magnet is de-energized, the clutch C is engaged by a spring C<5> and a sleeve C<4> is rotated. This sleeve is screw-threaded into the member F<3>, which is thereby moved to the tight becoming unlocked, and at the same time applies the clutch F. The epicyclic train then revolves as a whole. When the magnet is again energized, the part F<3> is returned by a torsion spring F<4>. A similar epicyclic train G<1>, G<2>, H<1>, controlled by a plate clutch G<6>, threaded members J, J<1>, magnet M', and plate clutch M' connected to the driven shaft N, transmits two speeds from the shaft G to an intermediate shaft G<5>. By combining the two trains, four forward speeds are obtained. For reversing, a toothed segment K<2> on a rod L, which normally holds a disk K against rotation, is moved to the left, so as to engage teeth G<8> and lock the planet carrier G<4>, and, at the same time, a claw clutch Q<1> on an arm L<2> moves out of engagement with teeth P' on the shaft G<5> into engagement with teeth H<3> on a sleeve H<2> connected to the annulus H, the clutch Q<1> driving the shaft N through a member N<1>. The planet carrier being stationary, the annulus is reversed, and two speeds of reverse are obtained by means of the first epicyclic train.
Patent GB-488384-A (GB)
Title: An improved pouch
IPC: A24F23/02
Filed: 1937-04-08
Abstract: 488,384. Tobacco pouches. SHOERATS, H. April 8, 1937, No. 6402. [Class 133] An inner receptacle B of indiarubber or similar waterproof material is secured to the inner face of the flap portion C of a tobacco pouch. The mouth of the receptacle B is of curved form, the doubled back portion D, which is stitched to the flap C, extending higher than the front part. The pouch is closed by tucking the flap between the front wall of the pouch and the body part of the inner receptacle.
Patent GB-678143-A (GB)
Title: Improvements in electrolytic capacitors
IPC: H01G9/045
Filed: 1951-03-19
Abstract: 678,143. Electric condensers. PHILIPS ELECTRICAL INDUSTRIES, Ltd. March 19, 1951 [March 22, 1950], No. 6514/51. Class 37. An electrolytic condenser has an aluminium electrode with less than 0.01 per cent copper, an iron content of 0.03 to 0.08 per cent, and a silicon content being 0.01 to 0.05 per cent higher than the iron content. This material can be etched and formed in a total time that is shorter than pure aluminium.