baber/WOPTO huggingface dataset:
Patent GB-471738-A (GB)
Title: Improvements in and relating to wireless and like receivers
IPC: D06B3/16
Filed: 1936-02-04
Abstract: 471,738. Wireless receiving-apparatus. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Feb. 4, 1936, No. 3383. Convention date, Feb. 4, 1935. [Class 40 (v)] A superheterodyne receiver using a relatively high intermediate frequency is provided with control means operating automatically to reduce tuning error actuated by a discriminating circuit fed with oscillations derived from intermediate frequency oscillations but of lower frequency. Fig. 1 shows a receiver in which the intermediate frequency is applied to a frequency changer 19 in the output of which is an error detector comprising tuned circuits 23<1>, 24<1> and differentially arranged rectifiers 22, 22<1>. Tuning is controlled by a voltage-operated electronic condenser and may be of the kind described in Specification 428,772. A switch 29 may be provided to render the frequency control inoperative to facilitate the tuning-in of weak stations and may be conjointly operated with the tuning control. In a modification, Fig. 2 (not shown), the tuned error detector circuits are included in the anode circuit of the frequency changer and the control is effected by varying the inductance of the local oscillator tuned circuit. For this purpose an inductance coupled to the tuned circuit is included in the cathode lead of a triode valve, the bias voltage of which is controlled. A variable impedance may be connected in series with a fixed reactance across the tuned circuit, Figs. 6 and 9 (not shown), or instead of the anode impedance of the valve being varied the mutual conductance or the grid conductance may be varied, Figs 7 and 8 (not shown). Fig. 10 shows a frequency changer T1 and an error detector comprising transformers with the primaries P1, P2 in parallel and damped by a resistance R1, the coupling to the secondaries S1, S2 which are tuned above and below the operating frequency being loose. The output of the differential rectifier T2 is applied to a triode T3 in shunt to an inductance 80 loosely coupled to the tuned circuit 81 of the local oscillator. Excess inductive admittance of the coil 80 is tuned out by condenser 82 and variation of the impedance of the valve varies the inductance 81. The condensers of the circuits 80, 81 are uni-controlled to keep the impedance reflected across the circuit 81 a combination of resistance and reactance of equal magnitude. The error detector rectifiers may be fed through separate amplifying valves, Fig. 5 (not shown). Specification 401,728 also is referred to. The Specification as open to inspection under Sect. 91 comprises also arrangements in which the intermediate frequency is not reduced in value before application to the error detector and in which the last amplifier feeds both the signal and error detector circuits in series, Fig. 6 (Cancelled, not shown). This subjectmatter does not appear in the Specification as accepted.
Patent GB-265632-A (GB)
Title: Improvement in power actuators or servomotors
IPC: B60T13/24
Filed: 1926-03-10
Abstract: 265,632. Bragg, C. S., and Kliesrath, V. W. April 16, 1925, [Convention date]. Fluid-pressure.-A power actuator for operating brakes, clutches or other parts of motor vehicles or aircraft &c. comprises a cylinder containing a double-acting piston 204 having a cylindrical valve chamber 213 and ports 215 connecting the chamber with the ends of the cylinder on opposite sides of the piston, a piston valve 214 in the chamber having cylindrical portions 224 adapted to register with the ports and a .suction chamber 223 between these portions adapted to be brought into register with the ports; the valve is connected by a sleeve 220 with the operating means, and the piston connected by a rod 207 with the part to be actuated; the sleeve interior may connect the suction chamber 223 through ports 218 with the fluid outlet 229, and may connect the ends of the cylinder through the ports 215, a longitudinal by-pass through the valve, and ports 226 with an atmospheric or higher pressure inlet 211; the chamber 223 connects both ports 215 with each other and the suction in the neutral position of the valve. Fig. 1 shows the apparatus applied to actuate a band brake 271 of a motor vehicle through a lever 272 linked to the piston rod: the fluid outlet 229 is connected with the intake manifold of the engine. The piston may be retracted by a spring 231, Fig. 2, engaging collars 232, 234 secured to the piston rod and to the valve sleeve; alternatively, a spring may be applied to the brake pedal 288. In the normal or off position, the piston hub 212 engages the cylinder head 203 and the valve sleeve is arrested by a. collar 235 engaging a boss 236 on the other head. Lost motion between the valve and piston may be limited by the valve or by a flange 238 on the sleeve engaging the end of the piston rod when moved. Human strength may thus supplement or replace the pneumatic force normally applied.
Patent GB-988812-A (GB)
Title: Trailer running gear
IPC: B60G11/18
Filed: 1963-01-29
Abstract: 988,812. Vehicle suspensions. LEE C. MOORE CORPORATION. Jan. 29, 1963 [Feb. 5, 1962], No. 3595/63. Heading B7D. A trailer wheel suspension comprises a walking beam W pivotally supported in a bracket 7 attached by a bolster 8 to the vehicle frame F and comprising a rigid tube 1 formed at its ends as trunnion members for rotatable axle housings 11 to which an axle 16 is connected by plates 12. A pair of plates 21 is welded at each end of the tube 1 and extends beneath the housing 11 which has radially welded thereto a plate 20 through which extends a rod 22 connected to the plates 21 and having mounted thereon springs 24 which are compressed between the plate 20 and each plate 21 and yieldingly resist rotation of the housing 11 in either direction. In a modification, Fig. 5, a cap member 34, 36 is attached to the rotatable axle housing, the cap members at each end being connected by a torsion bar 26. The springs 24 may be omitted in this embodiment. In a further modification, Fig. 6, the springs 24 are omitted and a torsion bar 49 connects caps 46, 47, 48 attached to each rotatable axle housing 44, the torsion bar being connected at its centre to an end 55 of a torsion tube 53 which is welded at its outer end to a fixing ring 54 attached to the inside of tube 43 (which corresponds to the tube 1). The sleeve 53 may be replaced by a coil spring. In another form for wheel pairs in non-tandem arrangement, Figs. 9 and 10, the axle 65 is carried by a housing 60 rotatably mounted on the end of a tube 61 welded to a channel member 62 carried by a bolster 63 attached to the vehicle frame. A cap member 66, 67, 68 is attached to the axle housing 60 and is connected to a torsion bar 69 connected at its inner end to a torsion tube 72 which is anchored by a ring 73 to the tube 61. In each case, there is resilient resistance to rotation in a transverse plane of the axle for each wheel pair.
Patent GB-664757-A (GB)
Title: Improvements in mechanical couplings
IPC: F16D7/02
Filed: 1949-02-09
Abstract: 664,757. Clutches. KANGO ELECTRIC HAMMERS, Ltd., and BADCOCK, F. Feb. 9, 1950 [Feb. 9, 1949], No. 3604/49. Class 80 (ii). The invention comprises a clutch, for use in percussive tools and the like, which allows slip when severe torsional shocks have to be absorbed. A double-walled cup 4 is screw-connected to the driving shaft 1, and to the cup is attached a conicallybored housing 9. Within the housing is a driven member comprising a hub 11 having a splined bore 12 and provided with a number (as shown, four) of equiangularly spaced wings 13 parallel to the axis of the shaft 1; between the wings the body of the hub 11 is curved. The wings 13 terminate short of the spline bored body of the hub 11 so that the projecting end constitutes a spigot portion 14 which can enter the washer-like disc 15. The disc 15 is a free sliding fit within the mouth of the outer wall.7 of the cup 4, so that it can move axially, this movement being controlled by the coiled compression spring 16. The hub wings 13 locate and key in position a number of rubber slippers 18, the outer faces of which stand proud of the edges 19 of the wings and are complementary in shape to the bore 10 of the housing 9. The bore 10 is provided with an irregular surface of good finish to actuate but not abrade the surface of the rubber. The housing 9 may be provided with one or more slots to allow for the escape of oil or the products of normal wear. Within the splined bore 12 of the hub 11 is received one end of a freely axially slidable splined shaft, to the other end of which is attached means for producing a percussive motion which results in the splined shaft reciprocating while maintaining its rotary connection with the hub 11. Initial stress is absorbed by the rubber slippers 18 and before stressing reaches the point at which material. damage might occur the splined shaft frictionally interacts with the hub 11 to move the slippers endways and allow slipping.
Patent GB-623379-A (GB)
Title: Improvements in or relating to electric potentiometers and to remote supervisory systems
IPC: G08C19/02
Filed: 1946-02-05
Abstract: 623,379. Potentiometers. STANDARD TELEPHONES & CABLES, Ltd., Mc- WHIRTER, E. M. S., DUNN, R. H., and LENNOX, P. W. Feb. 5, 1946, No. 3617. [Class 37] In a circuit for automatically comparing an electrical condition of unknown value with a reference condition, a range of reference values is provided by means of coarse and fine potentiometers. As shown, the wipers sam4, 3 and sbm2 of the coarse and fine step - by - step wiper switches SA, SB indicate the percentage setting of the potentiometer by displaying the hundreds, tens and units digits corresponding to the positions of switches SA, SB which are set automatically to balance the unknown voltage against a percentage of the reference voltage. In operation, after the closure of key KT, if the voltage at sam1 is less than the unknown voltage, the magnet SAM is energized in a self-interrupting circuit until wiper sam1 reaches a position in which the percentage of the reference voltage applied to a balance amplifier (not shown) exceeds the unknown voltage. Contacts BAC then change over to stop the switch SA and to energize relay CO which locks up, adds a resistor R in series with the potentiometer resistance associated with bank sam1 and connects the resistance associated with bank sbm1 of the switch SB across the two resistors R selected by the wipers sam1, 2. By design 5r=R where rand R are the resistors between individual contacts of SA, SB respectively, hence the balance amplifier which draws no current, is now connected to a point along the coarse potentiometer SA which is lower by one step, i.e. by a resistor R, than it was before the relay CO was operated. The resulting relapse of BAC completes a self-interrupting circuit for SBM until the wiper sbm1 is positioned to produce a percentage of the reference potential equal to or greater than the unknown voltage, whereupon SBM is stopped by the change over of BAC. The positions of switches SA, SB now indicate the value of the unknown voltage. The key KT is opened manually to unlock relay CO. If the comparison voltage is less than 20 per cent of the maximum reference voltage, the switch SA is not operated, the adjustment being effected by switch SB alone. Voltages below 10 per cent of the maximum reference voltage are not evaluated. Specifications 555,999 and 621,384, [both in Group XXXVIII], are referred to.
Patent GB-795566-A (GB)
Title: Improvements in or relating to thermionic dispenser cathodes
IPC: H01J1/28
Filed: 1956-02-06
Abstract: 795,566. Cathode materials. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Feb. 6, 1956 [Feb. 9, 1955], No. 3626/56. Drawing to Specification. Class 39(1). In a dispenser cathode in which the emissive material is dispersed throughout a body of porous refractory metal, said material consists of a fused mixture of (a) barium oxide, (b) aluminium oxide and/or boric oxide, and (c) one or more of the oxides of calcium, strontium, and magnesium ; the mole ratio of (a) to (b) is in excess of 1 : 1. The cathode may be made either by compressing and heating a powdered mixture of the refractory metal and the prefused compounds, or by impregnation. Preferred proportions of materials, and temperatures, are given for each of these methods. Some experimental data showing relative emission for various proportions of constituent materials is given. Specifications 734,209 and 734,311 are referred to.
Patent GB-1151983-A (GB)
Title: Clamp for Sewing Machine
IPC: D05B3/14
Filed: 1968-01-24
Abstract: 1,151,983. Sewing machines. PENNSYLVANIA SEWING RESEARCH CORP. 24 Jan., 1968 [25 April, 1967], No. 3639/68. Heading D1G. A clamp for mounting a button holder 31 comprises two "L" shaped legs 35, 37 pivoted at 43 and held together by a screw 57 and a nut and bolt 65 the screw allowing relative movement of the parts in the longitudinal direction of the horizontal legs and the nut and bolt 65 allowing relative movement in both the longitudinal and transverse directions.
Patent GB-1536540-A (GB)
Title: Speed control of guided vehicles
IPC: G05D1/02
Filed: 1976-04-07
Abstract: 1536540 Automatic control ELECTRICAL RESEARCH ASSOCIATION Ltd 7 April 1976 [28 Jan 1975] 3713/75 Heading G3N The speed of a vehicle (industrial truck or tractor) which is automatically guided to follow a predetermined path (e.g. a leader cable) is controlled in response to deviations from the path and the alignment of guidance wheels with respect to a datum position, the speed being decreased when the deviation exceeds a predetermined value and increased when the wheel alignment is within predetermined limits. The deviation and alignment signals are analogue voltages which are compared with adjustable threshold values in differential amplifiers, Fig. 2 (not shown). The arrangement is such that an excessive deviation switches an unspecified speed controller to a "slow" condition, the guidance system (not described in detail) turns the steerable wheels to correct the deviation, and straightens them when this has been done, and, when the straight alignment of the wheels has been maintained for, say 2 seconds, the controller is switched to "fast". A separate timer prevents speed changes at closer than 7 second intervals. The alignment system maintains the vehicle at slow speed when a curve is negotiated. The control circuits are fully described.
Patent GB-1046084-A (GB)
Title: A curtain shutter for radiography, in particular for irradiated nuclear fuels
IPC: G21K1/04
Filed: 1964-01-29
Abstract: 1,046,084. Curtain shutter. COMMISSARIAT A L'ENERGIE ATOMIQUE. Jan. 29, 1964 [Jan. 29, 1963], No. 3794/64. Heading H5R. In the examination, for fractures &c., of irradiated nuclear reactor fuel elements or rods, the apparatus includes between the X-ray source and the film, a curtain shutter, comprising a frame 8 (Fig. 2) movable between two extreme positions, carrying two weights 9, 10 (Fig. 4, not shown) which provide between them an adjustable slit 11, the sides 19, 20 each being formed in sawtooth configuration of plane surfaces which converge towards a focal point, at which the X-ray emitter is located. The fuel rod to be radiographed is positioned under shielding 44, in front of the slit 11 and the film cassette is placed in its seating 21 behind the slit. A motor 22 drives the frame 8, on ball bearings located in grooves, between the arcuate tracks 2 and 3 of the stationary main frame 1. The gearing 23 is regulated to control the speed at which the slit 11 travels across the film. To stop the frame when it reaches one extreme position at the end of the arcuate track, a micro-switch 27 (Fig. 7, not shown) is actuated and the motor is stopped. The motor is D.C. operated and provides automatic braking. An extra switch is provided to start the motor in the reverse direction. If a microswitch fails, stop members 33 and 34 act as buffers. The circuit (Fig. 9, not shown) for operation of the motor includes the microswitches and a starting button 42, and provides for one-, two- or multi-directional operational cycles. The weights 8 and 9 are of lead or of natural or impoverished uranium, and can be unlocked and moved within the frame 8 to adjust the width of the slit. The sides of the slit are sawtoothed in order to cut down as much γ-radiation as possible from the element.
Patent GB-571875-A (GB)
Title: Improvements in or relating to tools for removing insulation from electric conductors
IPC: H02G1/12
Filed: 1944-03-06
Abstract: 571,875. Stripping cables. STANDARD TELEPHONES & CABLES, Ltd., FAIRLEY, F., and DELAMARE, A. C. March 6, 1944, No. 4120. [Class 36] [Also in Group XI] A tool for stripping cable insulation such as polyvinyl chloride comprises a pair of pivoted metal blades adapted to embrace the covering, one of the blades carrying an electric heating element. The tool comprises jaws 19 on blades 11 pivoted at 12 and having shanks 14 with hardwood handles 15. The pivot 12 consists of a screw carrying heater element 25 in contact with one blade, and wound on a mica former 24 and mounted in a steel saucer 21 having a steel lid and insulating cover. One end of the element is brought out to an insulated terminal 29 and the other end is secured to the steel cup and connects through screw 12 to the same blade which carries a terminal mounted on the same bolt as terminal 29. A twin flex 32 passed through one handle connects with the terminals. A piano-wire spring 17 tends to keep the jaws apart.
Patent GB-1415260-A (GB)
Title: Pliers-type stapler for attaching end stops to sliding clasp  fasteners
IPC: A44B19/60
Filed: 1973-01-26
Abstract: 1415260 Stapling tools SIGNODE CORP 26 Jan 1973 [26 Jan 1972] 4136/73 Heading B4C [Also in Division E2]  A stapling tool for attaching a staple type end stop to a sliding clasp fastener carried by stringer tape comprises a pair of levers 2, 3 pivoted together to form a jaw, one carrying an anvil 5 and the other provided with an operating finger 6 for actuating an ejector plate by which a staple is delivered from a magazine 1, and spaced projections 9, Figs. 1, 2 and 4, for positioning the fastener chain and holding the stringer tape against the anvil at each side of the fastener chain. The projections 9 may be in the form of loops made by bending back the bifurcated end of a leaf spring 11; alternatively, the projections 9 may be formed on the front plate 8, Fig. 3.
Patent GB-692307-A (GB)
Title: Improvements in, or relating to, electrically heated utensils
IPC: A47J31/50
Filed: 1950-02-21
Abstract: 692,307. Thermal switches. DAVIDSON, A. D., and SCAMMELL, E. W. May 21, 1951 [Feb. 21, 1950], No. 4375/50. Class 38 (v) [Also in Group XI] A thermal switch, e.g. for an electrically-heated utensil (see Group XI) comprises a spring arm 15 carrying a contact 15a which co-operates with a fixed contact 20a on a bracket 20, and a bimetallic strip 16 the free end of which is connected by a compression spring 19 to the free end of the arm 15. The strip 16 and arm 15 are secured to an insulated bush 10 on a stud 11 in the centre of a base chamber in the utensil. The contacts 15a, 20a, which are normally closed, short-circuit an auxiliary heating element adjacent the switch until a predetermined temperature is attained when the strip 16 flexes to cause the spring 19 to pass dead centre and deflect the arm 15 to open the contacts 15a, 20a. The auxiliary heater is then brought into circuit in series with the main heater, and generates enough heat to maintain the switch open.
Patent GB-1212651-A (GB)
Title: Reservoir pens
IPC: B43K5/18
Filed: 1969-01-27
Abstract: 1,212,651. Reservoir pens. LE FOYER ET CIE. 27 Jan., 1969 [5 Feb., 1968], No. 4427/69. Heading B6P.  A recess 16, provided in the upper surface of a nib, accommodates a capillary mass (24, Fig. 4) acting as a feed bar.
Patent GB-101959-A (GB)
Title: Improvements in and relating to the Treatment of Residues Obtained in Refining Fatty Oils.
IPC: C11B13/02
Filed: 1916-03-25
Abstract: 101,959. Du Pont de Nemours & Co., E. I., (Assignees of Stewart, J.). Oct. 27, 1915, [Convention date]. Fatty acids, obtaining; oils, recovering. - Oils and fatty acids are obtained from the foots resulting from the purification of oils with alkali, by treatment with an acid salt, such as nitre cake (acid sodium sulphate), dissolved in water.
Patent GB-607900-A (GB)
Title: Improvements in or relating to scratch brushing metal articles
Filed: 1946-02-13
Abstract: 607,900. Scratch brushing. JOSEPH, N. C. Feb. 13, 1946, No. 4441. [Classes 19 and 60] Means for scratch brushing aluminium hollowware or like articles comprise a spinning lathe on which the work-piece is mounted to be rotated at a high speed and means for mounting the scratch brush which permits of the brush being applied to the work-piece and given a traverse movement across the rotating surface thereof. A lever 5 carrying a brush 4 is pivoted at 9 so that the brush can be turned about the axis of the pivot bolt, pressed downwardly on a rotating work-piece 1 and drawn across the surface thereof at right angles to the direction of rotation. The mounting of the brush may be varied for scratch brushing internal or external cylindrical surfaces or the inside or outside of the bottom of a saucepan.
Patent GB-650570-A (GB)
Title: Improvements in or relating to frequency diversity telegraph systems
Inventor: CLARIDGE GEOFFREY MAXIMILIAN L
IPC: H04L1/04
Filed: 1948-02-16
Abstract: 650,570. Radio signalling. MINISTER OF SUPPLY. Feb. 16, 1948, No. 4445. Drawings to Specification. [Class 40 (v)] In a frequency diversity telegraphic system in which the carrier wave is rapidly alternated between frequencies f 1  and f 2  each keying change between " mark " and " space " is effected by preventing a change-over in frequency so that the carrier frequency remains constant for two consecutive switching intervals at the beginning and end of a " mark." At the receiver a switch synchronized with the frequency change-over switch at the transmitter passes the output of a frequency discriminator, consisting of two opposite alternating D.C. polarities, to two separate channels each comprising in parallel two oppositely poled rectifiers and integrating circuits and so connected to a teleprinter relay coil that a mark or space is produced depending on the change of phase of the frequency time division in the transmitted carrier. The relay is thus positively operated whether both or one only, due to fading, of the frequencies is effective, and is side-stable to ensure, along with the integrating circuits, continuity in operation if both frequencies fade.
Patent GB-312954-A (GB)
Title: A new or improved means for rendering the use of roads safer at night for vehicles and pedestrians
IPC: B60Q1/24
Filed: 1928-11-12
Abstract: 312,954. Sadler, W. W., and Castagnoli, G. Nov. 12, 1928. Lighting, systems of. - For flood lighting the offside of the road and the road to the rear of the vehicle three or more lamps a', a<2>, a<3> are carried at a relatively wide distance apart on the vehicle x each provided with a side screen b to prevent the projection of light in a forward direction. The lamps a<2>, a<3> are fitted beneath the running board x<1> and a further lamp a may be provided at the rear of the vehicle. The lamps and screens may be mounted in a single casing mounted beneath the running board or on the roof of the vehicle. Means may be provided for switching on the side lamps when the headlights are switched off, and the rear lamp casing may have combined with it the usual regulation rear lamp, direction indicating means and other signals. An illuminated sign may be provided to give warning to the drivers of approaching or following vehicles. on switching off the headlights and switching on the side lamps.