baber/WOPTO huggingface dataset:
Patent GB-1517325-A (GB)
Title: Hydrostatic vehicle transmission with automatic control
IPC: F02B3/06
Filed: 1975-10-03
Abstract: 1517325 Hydrostatic transmission control KLOCKNER-HUMBOLDT-DEUTZ AG 3 Oct 1975 [19 Oct 1974] 40616/75 Heading F2W In a hydrostatic transmission for an agricultural vehicle wherein the displacement of a variable displacement pump 8 and motor 12 in closed circuit 10, 11 are adjusted by servos 7, 13 to which control liquid is delivered by an engine-driven constant displacement pump 15 through a line 17 at a pressure determined by a variable throttle 20 and pressurization of the line 17 is prevented by a valve 30 until the pressure drop across a variable orifice 18 in the line 17 exceeds a predetermined value, means are provided to reduce the pressure upstream of the orifice 18 when a brake pedal is operated and thereby reduce the pressure drop across the orifice 18 and cause the valve 30 to open and vent the control pressure whereupon the transmission ratio shifts towards neutral for hydrostatic braking. The valve 30 is spring biased to its open position in which it vents the line 17 and the variable orifice 18 is connected by a linkage 22 to the engine fuel supply lever 3. When the lever 3 is moved to increase engine speed the pressure drop across the orifice 18 is increased to a value sufficient to change-over the valve 30. Thereafter the pressure in the line 17 increases to a value determined by the variable throttle 20 and is applied through a reversing valve 39 to the pump displacement adjusting servo 7 and through a line 44 to the motor displacement adjusting servo 13. If the load on the transmission is sufficient to slow the engine, the output from the pump 15 decreases and the pressure drop across the orifice 18 also decreases whereupon the valve 30 opens to effect an increase in transmission ratio and reduce the load on the engine. The resulting increase in engine speed causes the valve 30 to close and the original transmission ratio to be restored. Actuation of a brake pedal (not shown) causes a servo 24 to act through a lever 23 to open the variable orifice 18 and reduce the pressure drop thereacross whereupon the valve 30 opens to effect an increase in transmission ratio for hydrostatic braking. When the brake pedal is released the orifice 18 returns to its previous setting and the pressure drop thereacross closes the valve 30 to restore the original transmission ratio. In Fig. 2 (not shown) a relief valve upstream of the orifice 18 is opened by actuation of the brake pedal to reduce the pressure drop across the orifice 18 and thus provide hydrostatic braking. A brake light switch is associated with the relief valve.
Patent GB-884529-A (GB)
Title: Improvements in or relating to fluid valves
Inventor: ALLEN DEREK ALBERT
IPC: F16K1/46
Filed: 1958-12-17
Abstract: 884,529. Valves. BELL'S ASBESTOS & ENGINEERING Ltd. Nov. 20, 1959 [Dec. 17, 1958], No. 40709/58. Class 135. A fluid-control valve comprises a closure member 1 and a valve seat 2, the closure member carrying a resilient 0-ring 12 located in a groove 13 defined by a central portion 6 and a depending flange 10, the lower edges 7, 11 of the central portion and flange being chamfered for simultaneous engagement with chamfered surfaces 4, 5 on the seat. The 0-ring, which may be of rubber or plastics material, is retained in the groove 13 by the frusto-conical formation of the central portion 6. In operation, the 0-ring just contacts the surface 3 of the seat and continued movement of the valve causes the O- ring to be compressed until the surfaces 7, 11 and 4, 5 abut thereby preventing further deformation of the O-ring.
Patent GB-1078017-A (GB)
Title: Multiple twist spindle
IPC: D01H7/86
Filed: 1965-09-24
Abstract: In a multi-twist spindle comprising a package carrier with a cylindrical wall protecting the package, a magnet or magnets to immobilize the carrier is or are disposed half-way up the wall and are faced by counter-magnet(s) fixed to the machine frame or to the balloon limiter.  The magnets may be in pockets and for ease of fitting the wall may be detachable from the rest of the carrier.  The poles of the magnets lie in the radial direction of the spindle and those of consecutive magnets may be reserved. There may be four equally spaced magnets in each set disposed towards the corners of the rectangular space occupied by the spindle.  The magnet(s) on the carrier may be associated with a soft-iron ring to provide a magnetic return.
Patent GB-1043458-A (GB)
Title: Nest for egg-laying installation
IPC: A01K31/00
Filed: 1964-10-08
Abstract: 1,043,458. Nests. BEKOTO. Oct. 8, 1964 [Oct. 10, 1963], No. 41040/64. Heading AIM. A nest comprises a body member 4 having a solid bottom 5 and a perforated double bottom 6 which is inclined towards an aperture 7 in the side wall of member 4 through which eggs can roll on to a collecting means. The base 6 comprises a removable grate formed by bars of substantially triangular cross section and is supported on the solid bottom 5 by feet 13 connected by a reinforcement rib 14 and, on a shoulder 16 of member 4 by a peripheral rib 15. The member 4 has a part 11 adapted to rest on supports in a nest box of an egg-laying installation in which the egg collecting means is preferably an endless conveyer.
Patent GB-1491384-A (GB)
Title: Method for sample application to gel electrophoresis medi
IPC: G01N27/26
Filed: 1975-10-08
Abstract: 1491384 Transferring sample to gel medium MILLIPORE CORP 8 Oct 1975 [15 Nov 1974] 41157/75 Heading G1B [Also in Division C7]  A sample liquid is applied to a gel medium by a method comprising placing a cover sheet 8 over the surface of the gel medium 6, the sheet having a slit 10 formed in it at the desired sample application location, placing an amount of sample in excess of that to be absorbed by the medium over the slit 10 and allowing it to remain over the slit for a predetermined time, blotting the unabsorbed sample to terminate the predetermined time, and removing the cover sheet from the surface of the gel medium. The cover sheet may have in it a plurality of slits 10 and may be of polyethylene. If the sheet is of sample-wettable material an upstanding ring (12), Fig. 2 (not shown) or a ring of silicone grease may be applied to enclose each slit 10.
Patent GB-1254283-A (GB)
Title: Safety fluid loss warning indicator for brake fluid reservoirs
Inventor: THOMAS RONALD VICTOR
IPC: B60T17/22
Filed: 1968-08-29
Abstract: 1,254,283. Brake fluid level indicators; hydraulic brakes. R. V. THOMAS. 9 June, 1969 [29 Aug., 1968], No. 41190/68. Headings F2E and F2F. In an electrical warning indicator for a twin master cylinder brake fluid reservoir for a vehicle, switch contacts D, located in a cap or stopper J of the fluid reservoir, are operated by a contact plate E located on a non-conductive rod G attached to a single float B operating in the fluid reservoir which is provided with a central partition C. In the event of leakage of fluid in one master cylinder hyraulic circuit, the fluid level H (Fig. 1) will drop to level I (Fig. 2) and the contact plate E will make electrical contact with switch contacts D to operate a warning lamp in view of the driver. The brake fluid warning lamp is arranged to work in conjuncwith the engine oil-pressure lamp for test purposes.
Patent GB-1480775-A (GB)
Title: Method of forming waterproof mortar renderings
IPC: C04B28/02
Filed: 1974-09-24
Abstract: 1480775 Forming waterproof mortar renderings SIKA AG 24 Sept 1974 [2 Oct 1973] 41442/74 Heading ClH A method of forming a waterproof mortar rendering comprises applying a mortar mix from a spray nozzle on to a substrate to be rendered, an aqueous solution containing an alkali metal aluminate setting accelerator being added to the mortar mix at the spray nozzle. The aqueous solution may also contain an alkali metal hydroxide and an alkali metal salt of a polyhydroxy organic acid to stabilize the accelerator. In the example, a mixture of sand and cement is delivered by air pressure to the spray nozzle, where it meets the aqueous solution of setting accelerator and stabilizer therefor, preferably an aqueous solution of sodium aluminate, sodium hydroxide and sodium gluconate.
Patent GB-960967-A (GB)
Title: Push-button operated electric switch with electro-magnetic locking facilities
IPC: H01H3/50
Filed: 1962-11-02
Abstract: 960,967. Press button retractive switches; electrically released switches. STANDARD TELEPHONES & CABLES Ltd. Nov. 2, 1962, No. 41609/62. Heading H2B. The push-button operator 2 of a switch is latched in its depressed position by an electromagnet 11 acting on a ferromagnetic portion 10 of a pivoted lever 6, the portion 10 being arranged closer to the pivot 9 of the lever than is a portion 5 which latches the button against the action of its return spring (not shown). The portion 10 is loosely supported between two side plates forming the lever 6 to allow accurate alignment with polepieces 12 of the magnet 11. The electromagnet 11 is energized through a set of auxiliary contacts 20 when the pushbutton 2 is depressed. Several switches may be mounted side by side, an extension 24 (Fig. 2, not shown) of the lever 6 of one switch being arranged to release the contact set 20 of an adjacent switch to de-energize its magnet 11 and thus release its push-button.
Patent GB-966597-A (GB)
Title: Improvements relating to apparatus for producing ice-cream and like frozen confectionery
IPC: A23G9/22
Filed: 1961-11-21
Abstract: 966,597. Ice-cream freezers. E. RAPAZZINI. Nov. 21, 1961 [Nov. 25,1960], No. 41618/61. Heading F4H. In an ice-cream or like freezer comprising a mixing and cooling chamber 4, a refrigerating system for cooling the chamber and conveying means mounted on an axially movable shaft 9 in the chamber, the resistance of the material in the chamber, when it reaches the required consistency, moves the shaft so as to operate a switch to cutoff the refrigerating system and prevent further cooling. As shown, the ice-cream ingredients are introduced through opening 5, and the ice-cream is dispensed through outlet 6. The conveying means may be a screw, as shown, or helically arranged blades. The refrigerating system comprises a compressor 1, condenser 2 and cooling coil 3. When the shaft 9 is moved to the left by the resistance of the mix, it moves a pivoted member 15 through intermediate shaft 14 thus opening contacts 16, 18 in the electric circuit for the compressor. The shaft 9 is driven by motor 13 through pulleys 11, 12 and its axial movement is resisted by a spring 21 which may be adjusted by wheel 23. A slightly modified construction of the shafts 9, 14 and associated contact-operating parts, which is described in detail (Fig. 2, not shown), includes a screw for adjusting the sensitivity of operation of the member 15.
Patent GB-1026239-A (GB)
Title: Perforator
IPC: H04L17/08
Filed: 1964-10-14
Abstract: 1,026,239. Selective punching machines. GRETAG A.G. Oct. 14, 1964 [Oct. 15, 1963], No. 41969/64. Heading B4B. A perforator for punching hole combinations into a tape 5, card &c., comprises first and second spaced parallel rows I, II of punches disposed transversely to the direction of travel of the tape, selection means, comprising drivers for each punch, to select a combination of the punches in the first and second rows in response to first and second information-bearing signals respectively, actuating means common to both rows for simultaneously actuating the selected punches in both rows, and means for advancing to the punches a length of tape equal to twice the distance apart of the rows. As described, the drivers 19a ... 19i and 20a ... 20i, which may be made of light plastics material, are mounted on rotatable shafts 21a ... 21i and 22a ... 22i each connected to an electromagnetic device 23a ... 23i and 24a ... 24i actuable in response to an information-bearing signal to rotate the shaft, and thus move the driver into its punching position. Each row comprises eight information punches and one transport hole punch, co-operating with a die-plate 3 having holes 4 opposite each punch. Above the rows of punches in the common actuator comprising a grooved block 7 supported by bars 8 ... 11 and carrying a roller 15 which is ringed against an eccentric disc 16 by springs 12, 13. When the drivers are aligned with the grooves 18a ... 18i punching does not take place. Movement of the drivers into a vertical position prepares the punches for operation by downward movement of the block 7. The punches 1, 2 are mounted on supports 27, 28 which are secured at the free ends of resilient spaced leaf springs 77, 78. The other ends of the springs are secured to the supports 25, 26 for the electromagnets. In a second embodiment each punch is mounted at the lower end of a shank guided by guide pieces and subjected to the action of restoring springs. In operation, punching is initiated only when control instructions for the two rows of hole combinations have caused selection in both rows, and thus the first of two consecutive control signals is stored until the second signal arrives. Storage is effected in a circuit including for each punch position a pair of shift registers, together with a delay circuit and a plurality of AND gates rendered conductive at the correct moment by a cam contact controlled by a cam on the punch driving shaft 17. After punching an erase pulse resets the shift registers and prepares them for fresh instructions and after an interval, trips the paperfeed (not shown), corresponding to the means for advancing the tape, by two hole divisions. In further modifications, the punch block may be driven by a crank and the punches, control magnets and punching block may be located beneath the punching die.
Patent GB-1486204-A (GB)
Title: Process for the desulphurisation of iron with the aid of soda
IPC: C21C1/02
Filed: 1974-09-27
Abstract: 1486204 Desulphurizing iron HENKEL & CIE GmbH 27 Sept 1974 [29 Sept 1973]  42074/74 Heading C7D Desulphurization of ferrous melts is effected by the addition of briquettes of anhydrous soda of S.G. greater than 1À9 g/cc. The anhydrous soda is at least 98% Na 2 CO 3  and the water content is preferably lower than 0À1%. The briquettes may be produced by pressing between rollers.
Patent GB-943243-A (GB)
Title: Intermittent film feeding device
IPC: G03B1/22
Filed: 1960-12-08
Abstract: 943,243. Intermittent film feeding devices. BELL & HOWELL CO. Dec. 8, 1960 [Dec. 14, 1959], No. 42233/60. Heading B6B. [Also in Division G2] In an intermittent film feed device, a claw lever 15 having a cam follower 19 thereon engaging a cam 25 under spring loading is pivotally mounted at 16 on a second lever 17 pivoted about a fixed pin 18 and having itself a cam follower 21 engaging under spring loading the same cam 25. The device operates as follows. On rotation of the cam in an anticlockwise direction about its spindle 26 and starting from the position of Fig. 1 in which claws 15# on the lever 15 engage perforations in the film 14, the lever 15 is pivoted anticlockwise about the point 16 to advance the film in the guides 42, 43, the lever 17 is pivoted anticlockwise about pin 18 to remove claws 15# from the film, the lever 15 is pivoted clockwise for the return stroke and finally lever 17 is pivoted clockwise to re-engage claws 15# with perforation in the film-as shown in full lines in Fig. 1. Guides 42, 43 are provided with slots to accommodate the claws 15#. During the return stroke of the claw lever, a movable toothed platen 11 of a film perforator 10 (operating in synchronism with the cam) engages the film.
Patent GB-1383354-A (GB)
Title: Silencing fluid flow
IPC: F16L55/033
Filed: 1972-09-12
Abstract: 1383354 Silencing gaseous flow BOLT BERANEK and NEWMAN Inc 12 Sept 1972 [13 Dec 1971] 42243/72 Heading F1B A fluid medium flowing through a duct I is silenced by passage between a plurality of longitudinally extending sound-absorbing baffles 3 and the provision of chambers 7 communicating with the duct through sound-absorbing duct walls 5. The baffles 3 and walls 5 permit the passage of sound therethrough. The baffles 3 may extend in a direction perpendicular to the walls 5, Fig. 4 (not shown). Frequencies from 20 Hz to the upper end of the audio range are silenced and the spacing and length the baffles 3 may be small and large respectively compared to the wave length of the high frequencies silenced. Silencing gas turbines is mentioned in the Specification.
Patent GB-1363858-A (GB)
Title: Electrical circuit elements
IPC: H01C10/32
Filed: 1971-06-29
Abstract: 1363858 Variable resistor ERIE TECHNOLOGICAL PRODUCTS Inc 29 June 1972 [10 Sept 1971] 42314/71 Heading HIS A multi-turn control comprises a substrate 1 having a spiral resistor track 2 bonded to it, a spindle 11 mounted on a line passing through the centre of the spiral and a wiper contact 17 mounted so as to traverse the track on rotation of the spindle. As shown, a metallized termination pad 3 makes contact with one end of the track 2, whilst the other end is connected via a brass rivet 12 to a conductive track 5a on the other side of the substrate. A metal slipring 6 is connected by a tab 9 and conductor 4a to a pad 4, and depression 7 locates spindle 11. A parallel substrate 20 is formed with a spiral groove 24 which is a mirror image of track 2. Arms 14 and 15 attached to spindle 11 have slots (Fig. 4, not shown) carrying a tube 10 in which is mounted a brush contact 17 and a ball 16 held apart by spring S. As the spindle rotates the tube moves along the slots. The track 2 may be bonded in a groove which locates the brush 17. A resistive track may be bonded in grooves 24, ball 16 replaced by a brush and further slip-ring and wiper assemblies provided to increase the wattage capacity or provide a two-gang potentiometer; alternatively the track in 24 may be conductive and used in place of slip-ring 6 and wiper assembly 13. Substrate 1 is preferably of ceramic, e.g. alumina or beryllia, or of yttrium iron garnet. The resistor track may be formed by thick film, e.g. screening methods using a paste of a solvent, binder glass and metal. The metal may be palladium/silver or platinum/gold alloy, palladium oxide/silver, thallium or ruthenium. The thickness of the deposit is between 0À0005 and 0À0015 inch. For a thin-film circuit, the substrates may be glasses or glazed alumina and the track applied by vapour or electroless deposition methods.
Patent GB-1432148-A (GB)
Title: Core memories
IPC: H03K3/45
Filed: 1972-09-13
Abstract: 1432148 Magnetic storage arrangements PLESSEY CO Ltd 18 July 1973 [13 Sept 1972] 42415/72 Heading H3B A selected single magnetic core in a matrix bit store is switched at least for readout by the combination of equal X, Y and P line currents, the P line being one of a set of such lines extending diagonally of the X and Y lines. A four bit store is shown in Fig. 1 in which bit matrices BIT1 to BIT4 have common X and Y lines X1-X4, Y1-Y4, common P lines 1-4 and individual inhibit/sense lines Z, the P lines being selectively energized during readout only to give an accelerated switching time. In a modification, Fig. 2 (not shown) a separate set of P lines is provided for each bit matrix and accelerated switching is obtained additionally during writing by applying reversed current selectively to the P lines. The store may be extended by using a stack of 4 bit matrix planes.
Patent GB-1327244-A (GB)
Title: Coupler system for electronic musical instrument
IPC: G10H1/08
Filed: 1970-09-04
Abstract: 1327244 Electrophonic musical instruments MATSUSHITA ELECTRIC INDUSTRIAL CO Ltd 4 Sept 1970 [9 Sept 1969] 42595/70 Heading G5J A coupler system comprises a plurality of sampling means each adapted for sampling an input signal by a square waveform control signal, means for obtaining a plurality of tone signals coupled together by utilizing the sampled signals from said sampling means, and means for varying the duty ratio of the square waveform control signals to vary the degree of sampling of the input signals thereby varying the degree of coupling of the tone signals. The input signals may either be in the form of a tone signal, or a depression responsive signal, produced by the depression of a key. With a tone signal, the square waveform control signal is made to have a frequency greater than that of the tone signal. The input signal e 1  at 1 of the sampling circuit (Fig. 1) and the square waveform control signal e 2  at 2 produce a signal e 3  at 3, which is subsequently integrated by resistor R 2  and capacitor C 1  to produce the sampled signal e 4  at 4. If e 1  is a sinusoidal tone signal, then e 4  has the form shown in Fig. 5; and if e 1  is a depression responsive signal, the output signal at 4 has the form shown in Fig. 13. In the case of a depression responsive signal, the signal is subsequently passed to a gate circuit, which is opened by an amount determined by the degree of sampling of the signal to produce a tone signal corresponding to a particular note. Thus, notes, for example, in octave relation to each other may be coupled, the degree of coupling being independently controlled for each note. Notes produced by different keyboards, for example, on an electronic organ, may also be coupled in this way. The sampled signals may be integrated separately, as shown in Fig. 1, or may alternately be coupled and then all integrated together. The length of the depression responsive signal may be controlled by the time taken to depress a key, as illustrated in Fig. 15 (not shown). The square waveform generator comprises a differential amplifier supplied with saw-tooth waveform, which is subsequently shaped by a Schmitt trigger and an emitter follower to produce a square waveform. The duty ratio may be varied by varying the D.C. voltage supplied to the differential amplifier.
Patent GB-1018963-A (GB)
Title: Ignition systems for gas turbine engines
Inventor: CLARKE ALBERT EDWARD
IPC: H01T13/50
Filed: 1962-11-12
Abstract: 1,018,963. Spark igniters. JOSEPH LUCAS (INDUSTRIES) Ltd. Jan. 6, 1964 [Nov. 12, 1962], No. 42599/62. Heading F4F. [Also in Division F1] A valve-controlled fuel passage 19 is provided having an outlet arranged to direct fuel on to the discharge surface of a surface discharge sparking plug for gas turbine engines. As shown, the solenoid operated valve 11 is energized to permit flow of fuel when the plug is energized. The lip 20 is formed with four radial passages communicating respectively with passages 19. A number of modifications are described.
Patent GB-1514115-A (GB)
Title: Photocopying apparatus
IPC: G03B27/62
Filed: 1976-10-14
Abstract: 1514115 Photo-copying G RITZERFELD 14 Oct 1976 [7 Nov 1975] 42710/76 Heading G2A A photo-copier employing a photo-conductive surface has a transparent platen on which an original is supported in two portions, one of which (e.g. comprising separate lines or groups of lines) is stepwise displaceable towards the other (e.g. comprising a heading) to form a loop (comprising material which is not to be copied). As shown, one portion of an original is maintained stationary while the other is advanced between rollers 36 and 37, roller 36 being situated between original holding down devices 44 and 45 and roller 37 being rotated by a stepping mechanism. The advancing arrangement may be moved laterally and may be pivoted away from the platen for conventional copying. The stepping mechanism may be raised to facilitate feeding. In other embodiments, Figs. 4-9 (not shown), a shaft between the original and the platen is stepwise lifted by pivotal levers connected to a stepping mechanism situated to one side of the shaft. Masking may be effected by a cover 54 (as shown), a web (46), Fig. 1 (not shown), below the platen and having reflective masks (50), a laterally displaceable mask (68) situated between the platen and the original (Fig. 6), illumination of the photoconductive surface (Fig. 4), or employing cut copy paper of limited length. In a line-by-line copier, stepping may be effected on completion of scanning (Fig. 1). Alternatively, a desired line may be key selected.