baber/WOPTO huggingface dataset:
Patent GB-1256622-A (GB)
IPC: G05F1/44
Filed: 1969-01-16
Abstract: 1,256,622. Control of A.C. motors. INTERNATIONAL BUSINESS MACHINES CORP. 16 Jan., 1969 [16 Jan., 1968], No. 2599/69. Heading H2J. [Also in Division G3] An A.C. source 10 supplies a rectifier 11 whose output is applied to a regulator 12. The regulated signal is changed back to an alternating signal by converter 13 associated with a loadcompensating network 14 to energize a pair of A.C. motors which drive typewriters. The network 14 permits the transfer of energy in both directions between the supply circuit and load, the returned energy being stored and re-supplied to the load at a later time in the operating cycle. The network 14 also protects the regulator 12 against reactive load surges. The power source 10 is subjected to a constant impedance load at a particular phase angle even though the energy absorbed by the motor is continuously changing. The source 10 is connected to a ferroresonant step-down transformer 20, the rectifier 11 comprising diodes 26. Resistor 35 senses the current requirements of the units 13, 14, whilst resistor 31 detects changes in supply voltage. Transistor 32, acting as a comparator-amplifier stage, is controlled by the signals across resistors 31, 35, and is connected to amplifier stages 39-43. The transistor 43 and resistors 45, 46, act as an adjustable shunt for regulating the output from the rectifier 11. The direct voltage across capacitor 51 is converted to a square-wave voltage synchronized with the source through transformer winding 52. During positive half-cycles of the synchronizing signal, transistors 55, 61, 63, complete a discharge path for the capacitor 51 through the upper half of the primary winding of the load transformer 68. During negative half-cycles, the capacitor is discharged through transistors 56, 62, 64, to the lower half of the primary winding. The secondary winding of the load transformer is connected through contacts of relays K1, K2, to the motors 22, 23. When both motors are energized, the whole of the secondary winding is effective, whereas only part of the winding is used when the load consists of a single motor. Diodes 72, 73, provide circuit paths for reactive currents which flow when the voltage pulses applied to the load are reversed.
Patent GB-1257073-A (GB)
IPC: C09J7/10
Filed: 1969-01-24
Abstract: 1,257,073. P.V.C.-epoxy resin adhesive film. CIBA (A.R.L.) Ltd. 8 Jan., 1970 [24 Jan., 1969], No. 4310/69. Heading C3P. A heat-curable film for use as an adhesive is prepared by mixing an epoxy resin, a heat curing agent therefor and a P.V.C. plastisol, forming it into a layer which is heated to gel the plastisol thereby forming a film but not to cure the epoxy resin. In the examples the epoxy resin is a polyglycidyl ether of 2,2-bis(4-hydroxy-phenyl). propane or a novolac resin, or a reaction product of bis - (4 - aminophenyl) - methane and epichlorhydrin. The curing agents used are the reaction product of phthalic anhydride and diethylenetriamine, dicyandiamide, N,N- diallylmelamine, isophthalyl dihydrazide, or phthalic anhydride or dodecenyl succinic anhydride with N - (o - (N<SP>1</SP> - n - butylcarboxamido)benzoyl) morpholine. The P.V.C. plastisol is used in amounts of 1-10 parts per part of epoxy resin and is plasticized with benzyl nbutyl phthalate, dioctyl sebacate, dinonyl phthalate, or trixylenyl phosphate. The film is gelled by heating to 50-125 C. for 1-45 minutes and cured by heating under pressure. Aluminium alloy sheets are bonded by sandwiching a film of adhesive and heating for 1 hour at 180 C. under a pressure of 3À2 kp./cm.<SP>2</SP>.
Patent GB-1258910-A (GB)
IPC: G01V3/08
Filed: 1968-05-07
Abstract: 1,258,910. Measuring spacing electrically. CENTRAL ELECTRICITY GENERATING BOARD. May 2, 1969 [May 7, 1968], No. 21459/68. Heading G1N. The spacing between two members A, B is determined by measuring the compacitance between two electrodes C, D having an earthed screen E mounted therebetween on the member B. If member A is non-conducting, a conducting portion may be mounted opposite the electrodes. Alternatively, the member A may have a permittivity different to that of air. The electrodes may be any desired shape, e.g. rectangular as shown, or circular in which case they and the screen are arranged concentrically and the position and thickness of the screen E may be varied to obtain an optimum characteristic for a given practical application. Temperature compensation may be effected by determining the capacitance change to be expected from the expansion in the plane of the faces of the electrodes and arranging that this is offset by the perpendicular movement of E.
Patent GB-1265659-A (GB)
IPC: A01J7/00
Filed: 1968-07-17
Abstract: 1,265,659. Milking parlour. N. FINCH. 14 July, 1969 [17 July, 1968], No. 33930/68. Heading AIM. [Also in Division E2]  A milking parlour has a forked entry comprising an inlet passage 3, which may in an alternative lay out be omitted, and two outlet passages 7, 8. The outlet passages lead to two rows of stalls 16, 17, 18, 19, adjacent to which are passages 32, 33, and 15 which lead to the exit 2 from the building. The passage of cows through the milking parlour is controlled by pneumatically operated guillotine and/or swing doors 5, 6, 9, 106, 105, 12, 13, 20, 21, 22, 23, 24, 25, 26, 27. The stalls are arranged around a control pit 14. The guillotine doors consists of a frame 35 Figure 2 to which one end of a pneumatic cylinder 37 is attached. The door itself consists of tubular steel bars attached to a pair of vertical steel girders 40. The end of the pneumatic piston is attached to the bottom of the door 39.  The doors are controlled by an automatic hydraulic control system, such that the doors open in a predetermined sequence. The process is initiated from the control pit. Initially depression of a start button for stall 16 causes gate 21 to open allowing a cow that has finished milking to leave the stall. Swing gate 9 is then moved, if necessary, to permit access to passage 7. Gate 21 then closes and gate 20 opens to permit a fresh cow to enter stall 16. Guillotine gate 12 then opens to allow the cow in passage 7 to enter stall 16. During these operations an override control holds the gate on stalls 18 and 19 closed. When the cow has entered the stall depression of a "continuation" button causes gate 20 to close. Guillotine gate 12 is then closed. Gate 6 opens to permit a cow in passage 3 to enter leg 7, gate 6 then closes after a time delay. Gate 5 is then opened to permit entry of a cow to passage 3. The overide on the gates of stalls 18 and 19 is then removed. The doors for the other stalls operate in a similar sequence.
Patent GB-1266506-A (GB)
IPC: C04B35/591
Filed: 1968-10-01
Abstract: 1,266,506. Moulding silicon bodies. NATIONAL RESEARCH DEVELOPMENT CORP. 15 Oct., 1969 [1 Oct., 1968], No. 46625/68. Heading B5A. [Also in Division C1] A compacted silicon powder article is made by forming a dough-like material from silicon powder and a binder containing a thermoplastic resin and a solvent, evaporating a portion of the solvent thereby forming a semi-dried cake, consolidating the semi-dried cake by repeated hot milling thereof, forming the consolidated mixture into the desired shape and removing the remaining solvent from the formed article by heating. Preferably the binder comprises a solution of poly(butyl methacrylate) in trichloroethylene, the initial solvent removal takes place at room temperature and the remainder is removed at 130‹ C. after hot milling at 45-50‹ C. The proportions of silicon powder and binder are preferably 65% to 35% by weight. The article may then be converted to silicon nitride by heating in nitrogen, initially at 1000‹ C. and then at higher temperatures to complete the conversion.
Patent GB-1290497-A (GB)
IPC: H04L13/06
Filed: 1969-12-10
Abstract: 1290497 Tape readers CIBA GEIGY AG 10 Dec 1969 [13 Dec 1968] 60363/69 Heading G4M Reciprocating motion parallel to the tape is imparted to a feed arm 1 having teeth Is by means of an eccentric 3 which also imparts complementary motion to the arm 1 and a stop arm 2 in a direction perpendicular to the tape. Arm 1 is mounted on a leaf spring 6 clamped at 8 between members which are mounted on leaf springs 9 coupled to eccentric 3 so as to produce movement in the feed and return directions. Selectively operable arms 20, 21 are associated with eccentric 3 so as to rock lever 15 via links 18, 19 so that teeth Is engage the tape at the start of the feed or return motion; the teeth 2s being disengaged from the tape as the teeth Is engage it, and vice versa. Sensing pins may be biased towards the tape and retracted by a bail 41 operated by a projection 40 on link 19. Punches 44 may be operated by selectively operated members 45 associated with eccentric 3 and similar to members 20, 21.
Patent GB-1290774-A (GB)
IPC: C21C7/00
Filed: 1970-09-22
Abstract: 1290774 Producing leaded steels NIPPON KOKAN K K 22 Sept 1970 [4 Oct 1969] 45025/70 Heading C7D Free-cutting lead steels are produced by adding lead or lead alloy in rod form to molten steel in a ladle the steel being stirred by passing therethrough a gaseous substance such as argon or nitrogen, the rod of diameter 5-20 mm., being fed into the steel at a velocity of 1-20 m. /sec. the gas may be blown into the melt through a porous brick in the base of the ladle or through a long porous tube extending downwards into the melt. The lead may contain aluminium, silicone, manganese, chromium or nickel. Specification 1, 219, 706 is referred to.
Patent GB-1297183-A (GB)
IPC: A61M5/32
Filed: 1970-06-12
Abstract: 1297183 Hypodermic needle assemblies JOHNSON & JOHNSON 12 June 1970 [12 June 1969] 28594/70 Heading A5R A hypodermic needle assembly comprises a needle 8, Fig. 7, on a hub 10 and has a sheath 1 normally extending from adjacent a piercing end of the needle to the hub 10, the sheath being unattached to the hub and having a constricted portion normally sealing against the needle adjacent said piercing end, and the sheath being compressible with distortion along the needle after a self-sealing closed end of the sheath has been pierced by the needle and being resiliently self-returnable to its original position. The sheath is slidably sealed onto the needle by means of one or more internally projecting rings 5, Fig. 10, or by constricting the internal diameter over a section extending from the closed end, Fig. 13 (not shown). The sheath may have a rounded or flat closed end and the internal and external walls may diverge outwardly towards the hub 10. The sheath may be made of natural rubber, rubber compositions or rubber-like synthetic elastomers. The valve-forming sheath may be used on a double-ended needle 8, Fig. 6, with a hub intermediate its ends, the needle and sheath being stored in a container (22), Figs. 1, 2 (not shown) prior to screwing of hub 10 into the base of a hollow plastics material cylinder 11 so that one end of the needle with the sheath thereon is contained in the, cylinder. The other end of the needle may be inserted into a blood vessel and a glass vacuum tube, with a pierceable self-sealing stopper 16, introduced into cylinder 11 so that the sheath deforms as said one end of the needle 8 pierces therethrough and through stopper 16 allowing collection of a blood sample in tube 14. On removal of the tube 14 the sheath 2 ressumes its sealing position around the needle due to its resiliency. The closed end 3 of the sheath may be coated with liquid silicone and/or provided with raised projections to prevent adhesion to the stopper 16. The sheath 1 may also be used on the needles of ordinary hypodermic syringes.
Patent GB-1297978-A (GB)
IPC: G01P3/48
Filed: 1970-04-11
Abstract: 1297978 Frequency detectors ULTRA ELECTRONICS Ltd 6 May 1971 [11 April 1970] 17328/70 Heading H3A A frequency to voltage converter comprises complementary transistors 16, 17 having their bases connected to a periodic signal input, a capacitor 20 connected between a set of N, P electrodes, which are connected via a resistor 21 to a potential source 19 and to a smoothing and an amplifying circuit 23, respectively. In operation when transistor 17 is ON, capacitor 20 charges always to a predetermined level determined by resistors 21, 22 with a short time constant. A signal input at terminal 5 is applied via a signal squaring circuit 1, 2, 10 to the bases of 16, 17, and when positive, turns off 17 while turning ON 16 so that a negative pulse of constant energy is applied to amplifier 23, the frequency of the constant energy pulses determining the output level at 24. Minor voltage fluctuations affecting the amplitude of pulses are compensated by variable bias resistor 27. A further output is provided at 30.
Patent GB-1301396-A (GB)
IPC: G05G1/00
Filed: 1970-05-07
Abstract: 1301396 Counters SPECTROL ELECTRONICS CORP 7 May 1970 [15 Dec 1969] 22172/70 Heading G4D [Also in Division F2] A dial mechanism comprises a housing 11, 12 in which are an indicator (e.g. digital wheels 14) rotatively driven (e.g. via a worm 41 and wheels 46, 45, 48) by a sleeve 35 the bor of which can receive the shaft 23 of an electrical instrument (e.g. a potentiometer 21) the sleeve having releasable shaft securing (e.g. a grubscrew 40) and a releasably secured knob 13 covering one end of the sleeve. The knob may be of plastics and be shaped to resiliently locate on a flat 37 and groove 38 on the sleeve. The shaft 23 may have a slot 25 and the sleeve 35 a brake 50, 51 to allow relative adjustment prior to tightening the screws 40.
Patent GB-1309922-A (GB)
Title: Anti-corrosion composition for metal surfaces
IPC: C09D195/00
Filed: 1970-04-06
Abstract: 1309922 Bituminous composition DR PAUL RIEHM MITTELDEUTSCHE DACHPAPPEN FABRIK 6 April 1970 16261/71 Heading C3N A composition for protecting metal surfaces against corrosion comprises a mixture of bitumen, synthetic rubber, a solvent for the synthetic rubber, and aluminium, copper or a copper alloy, e.g. bronze, in a finely-divided form. The aluminium, copper or copper alloy may be incorporated in the form of a powder or paste, viz. a mixture of powder and a suitable liquid. A preferred composition comprises 20-50% by weight of bitumen, 2-3% by weight of synthetic rubber, 30-60% by weight of a solvent for the synthetic rubber, and 20- 40% by weight of aluminium. The solvent employed is preferably one based on high aromatic hydrocarbons. A rust inhibitor may be added preferably in an amount up to 5% by weight. Suitable rust inhibitors are zinc oxide, zinc naphthenate, wool oil or phosphoric acid esters. In addition a machine oil, preferably in an amount up to 5% by weight, and adhesive agent, such as an amine adhesive to which bituminous coal tar oil has been added as thinner, may be present.
Patent GB-1310170-A (GB)
Title: Supporting device for mobile excavators and cranes
IPC: B66C23/80
Filed: 1970-06-23
Abstract: 1310170 Supporting device for mobile excavators and cranes WEIMAR-KOMBINAT VEB 23 June 1970 30407/70 Heading B7J A supporting device, for mobile excavators and cranes, comprises a central carrier 1 upon which are pivotably mounted two outer carriers 3 which house hydraulically extensible and retractable arms 4; the arrangement is such that on extension of the arms 4 by piston and cylinder devices 6, the carriers 3 pivot downwards until pivotable support feet 5 on each arm find secure hold on the ground, the pivoting movement of the carriers being limited by stops 7 and 8 and the carriers being locked by pivoted catches 9. Upon retraction, the arms 4 contact and release the catches 9 to allow upward pivoting of the carriers 3.
Patent GB-1310375-A (GB)
Title: Covers or hoods for paper and like conditioning machines
IPC: D21G9/00
Filed: 1970-11-20
Abstract: 1310375 Canopy for web treatment machines; paper-making GREENBANK ENG CO Ltd and EASTON & JOHNSON Ltd 11 Nov 1971 [20 Nov 1970] 55197/70 Headings D1L and D2A A canopy or hood for totally enclosing a machine for the continuous treatment of material (e.g. paper) with humidified air or steam generated during the web treatment comprises a framework 1 (see also Fig. 1, not shown) composed of a plurality of insulated panels 2 supported on girders 13 which also carry a plurality of horizontal and vertical peripheral tubes 4 through which steam is circulated from a steam main 6 arranged in the roof of the cover to condensate mains 7 adjacent the lower panels 2, adjacent peripheral tubes 4 being inter-connected via flexible tubes 5 to allow steam to pass from main 6 to mains 7. The framework and panels 2 may be enclosed in an outer hood 14, the space between the outer hood and the inner hood formed by the panels 2 being insulated by cladding 15. The roof panels may be carried on rafters 12 supported by the girders 13 and by girders 16 secured to the rafters 12 by plates 17. The girders 16 are in turn supported by pillars 18 mounted on the treatment machine A and are reinforced by tie bars 19, 19b. The lowermost panels (2b) (Fig. 5, not shown) are secured to the underside of the lowermost horizontal row of tubes 4 and may be on runners (22) which slide in grooves (23) to allow access to the machine A below condensate mains 7. The apparatus allows the treatment of web material at operating temperatures inside the hood of 165F and 75% RH or higher and at the same time prevents the condensation of moisture onto the insulated panels 2.
Patent GB-1317564-A (GB)
Title: Wiper assemblies for electrical lamp lenses
IPC: B60S1/60
Filed: 1969-09-16
Abstract: 1317564 Cleaning lamp glasses JOSEPH LUCAS (INDUSTRIES) Ltd 4 Aug 1970 [16 Sept 1969] 45515/69 Heading A4F A wiper system for a vehicle or other electric lamp comprises a wiper blade having two diametrically opposed wiping portions 23 oscillated through 180 degrees arcs by a flexible rack 28 Fig. 1 (not shown) engaging a pinion 18 on the spindle assembly 17 carrying the blade. The flexible rack is housed in a flexible tube 29 and is reciprocated by mechanism driven by an electric motor. Such mechanism may drive two such flexible racks for driving wipers for two vehicle head-lamps. The same or a different electric motor may drive a pump for supplying washing liquid to nozzles mounted on the support 14.
Patent GB-1322736-A (GB)
Title: Apparatus for hot runner injection moulding
IPC: B29C45/27
Filed: 1969-12-09
Abstract: 1322736 Injection moulding machines JOSEPH LUCAS (INDUSTRIES) Ltd 30 Nov 1970 [9 Dec 1969] 59936/69 Heading B5A Injection moulding apparatus comprises fixed and movable mould parts 12, 11 respectively, a hot runner box 16 having therein a passage 19 communicating with a nozzle 13 carried by the fixed mould part 12, and releasable latch means 21 movable from a position in which it secures the fixed mould part 12 to the runner box 16 to a position in which it secures the fixed mould part 12 to the movable mould part 11. The latch means may comprise a bolt 21 pivoted to the mould part 12 and having a nut 23 engageable with projecting spigots 22, 24 integral with a spacing member 18 and the mould part 11 respectively. Material is injected into the mould cavity 10 from a reservoir (not shown) through the passage 19 and nozzle 13, the latter being provided with a heater 27. Heat insulating material is provided at 25, 28, 29 and 31.
Patent GB-1328558-A (GB)
Title: Fm pulse compression system for communicat-ons
IPC: H04L27/10
Filed: 1971-11-17
Abstract: 1328558 Digital transmission systems DEFENCE SECRETARY OF STATE FOR 17 Nov 1971 [17 Nov 1970] 54585/70 Headings H4L and H4P A demodulator for upward swept (1) and downward swept (0) chirp signals consists of: two mixers 12, 13 transposing the input signal into two separate frequency bands which are symmetrical about a selected frequency f 3 , a symmetrical dispersive network 16 having a delay-frequency characteristic also symmetrical about f 3  (A, Fig. 8, not shown), and two filters 17, 18 passing frequencies above (1) and below (0) f 3  respectively. The received signals at 11 sweep through a range of 2# in one or other direction about a centre frequency f 0 , The mixer outputs corresponding to an upward sweep of the received signal, both sweep upwards through 2#, one 12 starting from f 3  and the other 13 finishing at f 3 . Similarly, the mixer outputs sweep downwards, to and from f 3  respectively, for a downward swept received signal. Since the dispersive netwrok introduces a delay which is maximum (T, Fig. 8, not shown) at f 3  and which decreases on either side of f 3 , signals whose frequencies are swept away from f 3  in either direction are compressed to give a significant output from the network 16, while signals swept towards f 3  are expanded to give insignificant outputs from the network 16. Thus a significant output in the upper band f 3  to (f 3 +2#) is produced by upward swept received signals (1's) and a significant output in the lower band f3 to (f 3  - 2#) is produced by 0's. These signals are supplied by detectors 19, 20 to a threshold device 21 which regenerates the D.C. 0 or 1 signal. The dispersive network 16 may be one or a chain (Fig. 7, not shown) of second order all-pass networks (Figs. 3, 4, not shown). In what is said to be a known demodulator (Fig. 1, not shown) two dispersive networks are used having linear delay-frequency characteristics, one of which has a delay falling with rising frequency (C R , Fig. 5, not shown) and the other rising with rising frequency. One network then produces a compressed output for upward swept signals and the other network for downward swept signals. A synthesizer for generating the frequency modulating signal at the transmitter includes a shift register (Fig. 9, not shown) whose successively energized outputs are combined through progressively different resistors (R1 to RN) to give a rising voltage at the input of an amplifier (25). The output of the amplifier is applied to one gate (26), and the inverted (at 28) output is applied to a second gate (27). One or other gate is enabled by a sample and hold circuit 29 in response to a data input, to pass the rising or the falling (inverted) voltage to a voltage controlled oscillator 30.
Patent GB-1329962-A (GB)
Title: Fish tank
IPC: A01K63/00
Filed: 1970-09-16
Abstract: 1329962 Fish tank G F COX 16 Sept 1970 [16 June 1969] 30422/69 Heading A1A In a fish tank, a compartment within the tank is defined by an impermeable wall extending above the water level, with a chamber within the compartment, water flowing into the compartment via communication channels in the bottom of the wall, from the top of the compartment into the chamber and then back to the remainder of the tank. In an embodiment, a false end wall 2 defines the compartment 6 incorporating a filter bed 10. Within, and in communication with the compartment is the chamber 8, in which water treatment apparatus may be housed. Water flows through the permeable false bottom 1 and the filter 10 before returning to the tank by passing over a weir 9 into the chamber and then back into the tank via pipes 12. In another embodiment, the false bottom 1, which could be corrugated is omitted.
Patent GB-1331258-A (GB)
Title: Braking of rotary electrical machines
IPC: H02P3/24
Filed: 1970-05-15
Abstract: 1331258 Braking AC motors J & T ELECTRICAL CONTROLS Ltd 14 May 1971 [15 May 1970] 23543/70 Heading H2J A three-phase induction motor is braked by direct current derived from a rectifier D1 to D4, in series with an adjustable impedance L, which may be a choke, across the motor supply. For normal running the motor (MT), Fig. 2 (not shown), is energized when switch TS is closed, relay MR energized and motor contacts M closed. Providing the D.C. injection circuit functions correctly, relay R is energized, thus holding relay MR energized, and capacitor Cl, across relay R, charges. To brake the motor, switch TS is opened, relay MR de-energizes, relay BR energizes opening contact B3 and closing brake contacts B1. Whilst capacitor C1 discharges (holding relay R energized), D.C. is applied to motor terminals B, C, then relay R de-energizes, contact R1 opens and relay BR de-energizes. The motor may be restarted using reset switch RS.