baber/WOPTO huggingface dataset:
Patent GB-1022426-A (GB)
Title: Process for the treatment of cyanhydrins
IPC: C07C67/00
Filed: 1965-02-04
Abstract: A process for the decomposition of cyanhydrins of aldehydes of aldehydes or ketones comprises introducing the cyanohydrin or a mixture containing the same into a liquid phase maintained at its boiling point and at a pH greater than 3.5, and passing steam through said liquid phase to produce a gaseous mixture containing steam, hydrocyanic acid and the corresponding carbonyl compound. The liquid phase may comprise water or an organic solvent or a mixture of water and a water-immiscible organic solvent. The pH may be maintained by feeding an alkaline substance such as an alkali metal hydroxide or carbonate, suitably as an aqueous solution, to the liquid phase.  The process may be applied to acrolein cyanhydrin obtained as a by-product in the production of acrylonitrile by catalytic oxidation of propylene in the presence of ammonia, and the resulting acrolein and HCN may be recycled to the acrylonitrile process.ALSO:A process for the decomposition of cyanhydrins of aldehydes or ketones comprises introducing the cyanhydrin or a mixture containing the same into a liquid phase maintained at its boiling point and at a pH greater than 3.5, and passing steam through said liquid phase to produce a gaseous mixture containing steam, hydrocyanic acid and the corresponding carbonyl compound. The liquid phase may comprise water or an organic solvent or a mixture of water and a water-immiscible organic solvent.  The pH may be maintained by feeding an alkaline substance such as an alkali metal hydroxide or carbonate, suitably as an aqueous solution to the liquid phase.  The process may be applied to acrolein cyanhydrin obtained as a by-product in the production of acrylonitrile by catalytic oxidation of propylene in the presence of ammonia.
Patent GB-216193-A (GB)
Title: Improvements in dynamo-electric machines for the transformation of electrical energy
IPC: H02K47/16
Filed: 1923-02-20
Abstract: 216,193. M.-L. Magneto Syndicate, Ltd., and Watson, E. A. Feb. 20, 1923. Thermionic amplifiers, detectors, and generators. - In dynamo-electric machines for supplying anode and filament voltages in which the power element comprises an armature having two windings with a commutator connected to each winding, the field is produced by permanent bar magnets of cobalt steel connected by laminated pole-pieces A<4> having chamfered tips. Hollow endcaps A<10> of insulating material are provided and these support the bearings and brushes. Smoothing circuits are provided on the filament and anode sides of the machine, the input circuit comprising a choke F in conjunction with the filament battery used as a capacity element. The output smoothing circuit comprises a pair of symmetrical choke coils C, C2 mounted side by side on the same laminated core, a condenser E being connected across the coils. A pair of condensers E, E<2> may be employed and these may be connected as shown in Fig. 5. or when the filament battery is used as a capacity element on the input side the condenser E<2> may be connected in parallel with E across the terminals E<2>. The chokes are constructed as units on a base C<5> provided with an insulating cover C‹ carrying the coil terminals C'. Extra smoothing circuits can be added if required. A high resistance H wound inductively and provided with tappings H<2>, H<3>, H<4> is employed on the output side for tapping off voltages to high and low frequency circuits. A relatively large condenser J is connected across the resistance H. A rheostat B with an off-position is provided on the input side to regulate the anode voltage. The armature is wound with a larger number of coils and provided with more commutator segments than usual and is overwound with iron wire. The elements are built up as a complete unit construction provided with rubber feet K<2> and buffers K<3> for deadening the noise produced by mechanical vibration.
Patent GB-1224833-A (GB)
Title: Current regulating circuit
IPC: G05F3/22
Filed: 1969-01-29
Abstract: 1,224,833. Automatic current control. TEKTRONIX Inc. Jan.29, 1969 [Feb.8, 1968], No.4947/69. Heading G3R. The current through a load 60 is determined by a control current through a resistor 64. When the load current tends to increase, for example, the voltage-drop across diode 40 and the basepotential of transistor 46 both increase, whereby the collector-potential of this transistor decreases. This causes the base-potential of transistor 30 to decrease and restores the load current to its former value. Similarly if the load current tends to decrease, the base-potential of transistor 30 is raised to adjust the current towards its desired value. The diode 40 compensates for temperature changes of the transistor 46. A linear relation exists between the current through the diode and the collector-current from the transistor 46. The diode 40 may be replaced by a transistor 40<SP>1</SP> having similar characteristics to the transistor 46, the collector 68 being connected to the base 70. The transistors are fabricated on a common semiconductor integrated circuit structure, the transistor 30 having collector 36 formed by an N-type epitaxial layer upon P-type substrate 72. Emitter 38 comprises an N-type emitter diffusion, and base 56 is a P-type diffusion. P-type isolation diffusion regions 74 separate the transistors 30, 40<SP>1</SP>, and 46. The emitter 52 may be smaller in area than the emitters 38, 66 so that the reference control current is smaller than the load current.
Patent GB-761127-A (GB)
Title: Musical instrument of the electronic type
IPC: G10H1/32
Filed: 1953-02-23
Abstract: 761,127. Electrophonic musical instruments. HOHNER AKT.-GES., M. Feb. 23, 1953 [Feb. 29, 1952], No. 5018/53. Class 88 (2). The components of an electrophonic musical instrument are housed in the framework of an accordion and the timbre control with its operating switch keys takes the place of the usual bass keyboard. Timbre is controlled by filter coils 12, Fig. 3, switches 13 and buttons 9 assembled as a unit 7 at one end of the bellows. The same unit 7 incorporates locking means 10 for the buttons and switches 11 controlling decay and vibrato. The bellows are held together at 6, Fig. 1, so that only the top of the bellows can spread and the electric wiring 8 is relieved of strain. A valve unit 14 for generating distorted oscillations, and an oscillator coil 18 are mounted on a common base-plate 15. A loud-speaker 21 is carried by a partition 5 which screens the circuit elements from the heat of the valves. The oscillator coil 18 is associated with a reed spring 25 carrying an armature 23. A frequency vibrato is produced when the spring vibrates. Spreading of the bellows operates the volume control 53 through a linkage 35 and a cable drive 34. The connections of the oscillator coil 18 may be changed to provide an octave shift by means of a sliding handle 33, links 31, 32, and a shaft 28. Control shaft 24 controls the tuning of the whole instrument and shaft 27 controls the vibrato frequency. Beneath the keys 36 are pitch controlling switches 37. In another arrangement (not shown) a manually-operated rod slides longitudinally to provide vibrato and rotates about one end to control the timbre. Specification 706,862 is referred to.
Patent GB-704779-A (GB)
Title: Improvements in and relating to intruder-operated alarm devices
Inventor: DAVEY FRANCIS GRANVILLE GORDON
IPC: G08B13/24
Filed: 1951-03-02
Abstract: 704,779. Burglar and like alarms. E.M.G. HANDMADE GRAMOPHONES, Ltd. March 3, 1952 [March 2, 1951], No. 5164/51. Class 118 (1). An alarm device responsive to the presence of an intruder comprises an electric conductor to which are applied radio-frequency oscillations and receiving means connected to the conductor for detecting variations in the transmission characteristics of the conductor occasioned bv the proximity of an intruder. This invention is particularly suited for the protection of large regions, e.g. an airfield. In such a system, Fig. 1, a transmitter 11, generating radio-frequency oscillations having a frequency of the order of 200 Mc/s, is connected by a length of wire 10 to a receiver 12. The oscillations generated at 10 are modulated at 1,000 c/s and the signals received at the receiver 12 are detected to extract the 1,000 c/s modulating signal whose amplitude varies with presence or movement of persons near the wire 10. The 1,000 c/s signal is passed through a rectifier to give a unidirectional signal and this is applied via a differentiating circuit having a time constant between “ second and 5 seconds, to a valve circuit operating a relay which controls an indicator lamp or alarm bell. Due to the differentiating circuit slow changes in the transmission characteristics of the wire 10 caused, for example, by changing weather conditions do not actuate the indicator while rapid changes such as those produced by movement of a person near the cable cause the indicator to be actuated. A discontinuity (e.g. an abrupt change in the direction of the conductor or the insertion of an insulator therein) may be arranged in the conductor at points where increased sensitivity is required, the field strength being greater in the region of such discontinuities. Signalling locality of intrusion to central station. Fig. 4 illustrates a system giving an alarm at a central station 50 indicating the locality from which it has been received. The system comprises three transmitter-receiver combinations, 44 and 45, 46 and 47, 48 and 49, each employing respective distinctive transmission and modulation frequencies. Transmission is effected by means of a pair of conductors 10 which are also used to supply power to the transmitters and receivers from the central station and to convey signalling currents from the receivers back to the central station. Each receiver when actuated by the presence of a person near the corresponding length of conductor 10 transmits a distinctive signal which operates a respective one of the alarms 52, 53 or 54 at the central station. The Provisional Specification refers to Specification 688,644.
Patent GB-1489681-A (GB)
Title: Tufting machine for making figured fabric
IPC: D05C15/00
Filed: 1975-02-07
Abstract: 1489681 Tufting machine VERDOL SA 7 Feb 1975 [14 Feb 1974] 5228/75 Heading D1C A tufting machine producing tufts of varying heights by feeding yarn 4 to the needle 3 at a selected one of more than two speeds comprises rollers 12, 13, 39, 40 driven at different speeds, the yarn passing over a roller 8 movable under jaquard control to contact a selected driven roller. The roller 8 is mounted on a support 10 movable by jaquard mechanism 15 to contact either driven roller 8 movable under jaquard control to roller 12 or roller 13, the support being shiftable, so that the roller can be engaged with either roller 39 or 40, by mechanism 15' connected to one arm of a bell crank lever 36 on which support 10 is pivoted. Supports 10 and lever 36 are connected to the machine frame by respective resilient blades 29, 29' to provide a snap action. The yarn roller 8 is mounted at the end of support 10 on a bearing (43 Fig. 5 not shown) and is provided with an elastomeric tyre (44).
Patent GB-1418926-A (GB)
Title: Transmission systems
IPC: F16H59/16
Filed: 1973-02-02
Abstract: 1418926 Hydrostatic transmission LINDE AG 1 Feb 1974 [2 Feb 1973] 5287/73 Heading F2W In a hydrostatic transmission for a tractor wherein an engine driven pump 6 supplies pressure liquid to a motor 9 and a manual control lever 15 adjusts the displacement of the pump and/or motor, an override control for reducing the output speed on overload comprises means 4 responsive to the input shaft torque which supplies an electric signal to a controller 26 to reduce pump and/or increase motor displacement. As shown a follow-up servomotor 18 adjusts the displacement of the pump 6 in response to movement of a pilot valve 22 actuated by pressure liquid supplied through lines 24, 25 from a pump 28 under the control of a manually actuated valve 30 and the controller 26. The controller 26 adjusts the displacement of the pump 6 and the engine fuel supply control 2 in response to movement of the lever 15. When the input shaft torque responsive signal applied to the controller 26 exceeds a predetermined value or a value corresponding to the engine fuel control setting the controller 26 acts to reduce pump displacement. The controller 26 may alternatively increase the engine fuel setting prior to reduction of the pump displacement. The torque responsive means 4 may comprise a strain gauge, an electro-mechanical transducer, an hydraulic pressure gauge, or a screw which acts through a ram to produce an hydraulic pressure. In Fig. 1 (not shown) the controller 26 is mechanically connected to the pump displacement control 7. When the torque responsive means provides a fluid pressure signal the latter may act directly or through an amplifying device on the transmission ratio control.
Patent GB-1396626-A (GB)
Title: Olefinic sulphones
IPC: C07C315/04
Filed: 1973-02-02
Abstract: 1396626 Olefinic sulphones RHONEPOULENC SA 2 Feb 1973 [2 Feb 1972 17 March 1972] 5371/73 Heading C2C The invention comprises compounds of the formula wherein X is halogen or -SO 2 R and R is alkyl, alkenyl, aralkyl, alkaryl or aryl which may be substituted by one or more substituents which are electron donors or acceptors with the proviso that R does not represent benzyl when X represents benzylsulphonyl. They may be obtained by reacting a 1,4-dihalogeno-2-methylbut-2-ene with an alkali metal sulphinate of the formula RSO 2 M wherein M is an alkali metal atom. Compounds in which X is -SO 2 R may also be obtained by reacting compounds of the above formula wherein X is halogen with an alkali metal sulphinate of formula RSO 2 M. Examples are given for the preparation of phenyl 4-chloro-3-methyl-but-2-enyl-sulphone and 1,4- bis-(phenylsulphonyl)-2-methyl-but-2-ene.
Patent GB-100280-A (GB)
Title: Improvements in Brackets.
Inventor: ERISMANN FRITZ
IPC: A47B57/46
Filed: 1916-04-13
Abstract: 100,280. Erismann, F. April 13, 1915, [Convention date]. Brackets.-An angular bracket 1 is mounted so as to be vertically adjustable on a holder 2 fixed to a wall or other support. The bracket is channelled and is formed with a strengthening-web 7 at the bend, this web being made by terming a depression in the channel. The bracket is clamped in position by a set-screw 3 passing through a slot 5. According to the Specification as open to inspection under Sect. 91 (3) (a) the strengthening- web may be made by flattening or spreading the limbs of the bracket. This subject-matter does not appear in the Specification as accepted.
Patent GB-810894-A (GB)
Title: Method of making cement bound asbestos paper
Inventor: LILLIS STEPHEN MARTIN
IPC: B28B1/52
Filed: 1957-02-18
Abstract: 810,894. Asbestos-cement paper &c. VIC-. TOR MANUFACTURING & GASKET CO. Feb. 18, 1957, No 5465/5 7. Drawings to Specification. Class 96. Asbestos-cement paper &c. is made on a single or multi-cylinder paper-making machine &c. from a slurry having 96 to 98 per cent of water, the solids of the slurry comprising 80 to 88 per cent of asbestos &c and 12 to 20 of Portland cement of high initial strength &c, the web being heated &c. to reduce the moisture content to 10 to 15 per cent, and the product being then allowed to cure e.g. for 48 hours or more under atmospheric conditions, e.g. in roll form or as stacked sheets. The cured web &c. is then finished and dried to a moisture content of less than 1 per cent. The web may be sprayed with an 8¢ per cent solution of sodium silicate.
Patent GB-1455473-A (GB)
Title: Vacuum cleaner mouth-piece
IPC: A47L9/04
Filed: 1974-02-06
Abstract: 1455473 Suction cleaner nozzle VORWERK & CO INTERHOLDING GmbH 6 Feb 1974 [8 Feb 1973] 05540/74 Addition to 1445160 Heading A4F The mouthpiece of the suction cleaner nozzle disclosed in the Parent Specification 1445160 is improved or modified by a spring-loaded catch which, when released, allows removal of the brush from the housing. In the described embodiment, the catch comprises a leaf-spring 37 which abuts a bush collar 35 to hold assembly 31 within socket 17, the axle 18 of the brush being mounted in the assembly 31. Depression of a projecting cap of the assembly forces collar 35 past the spring 37 to release the assembly 31 and hence the brush from the housing.
Patent GB-340169-A (GB)
Title: Improvements in phonographs
IPC: G11B17/00
Filed: 1930-02-19
Abstract: 340,169. Technidyne Corporation, (Assignees of Jones, L. L.). Feb. 19, 1929, [Convention date]. Magazine gramophones.-At the end of reproduction from a record, the turntable of an automatic gramophone is tilted downwardly to disengage the reproducer and simultaneously to move the latter outwardly. After the record changing operation, the turntable is raised and means are provided to position the reproducer over the blank margin of the record and to move it inwards to engage the sound grooves. The turntable 2 is driven through a shaft 4 by a motor 6 the whole being supported by a horizontal shaft 8 carried in bearings 10. The reproducer arm 16 is pivotally mounted on a shaft 20 which is rotatably supported within a fixed bearing sleeve 22. A support 24 prevents downward movement of the arm 16 at a point slightly lower than its playing position. For the record changing operation, the turntable is tilted to the position 2<1>, Fig. 1, the record being displaced into the magazine. 34 by ejector arms 30, and the next record to be played is moved into position from the storage magazine 36 to be picked up by the centre pin 32 on the upward movement of the turntable. During the downward movement a cam 40 fixed to the shaft 8 is also rotated and through a follower 42 causes the reproducer 14 to swing outwards against the torsion of a spring 44. When the turntable is being raised, the reproducer tends to swing inward but is arrested by a stop 58 carried by the shaft of a roller 50 rotatably mounted on a support 52 which is pivoted at 56. The roller 50 is yieldably urged against the periphery of the record by a spring 54. While the turntable is in the inclined position 2', Fig. 3, a catch 60 on the reproducer engages the stop 58 to position the reproducer at a point just inside the periphery of the record. When the turntable 2 is raised completely into the horizontal position, Fig. 6, the record contacts with the needle of the reproducer 14 to lift the arm 16 off the support 24 and to allow the catch 60 to clear the stop 58, whereupon the reproducer moves inward to the sound grooves. Specifications 338,820 and 338,821 are referred to.
Patent GB-423070-A (GB)
Title: Apparatus for indicating to a customer when a cash or like bonus is to be distributed
IPC: G07C15/00
Filed: 1934-02-20
Abstract: 423,070. Controlling sales; changing signs. JONGH, P. DE, 185, Van Heelsumstraat, The Hague. Feb. 20, 1934, No. 5589. Convention date, Feb. 27, 1933. [Classes 3 (i) and 116] In apparatus for indicating to a purchaser when a bonus is to be paid an indicator member corresponding to a predetermined price or range of prices is displaced by the salesman after each purchase to produce an indication which can be observed by the customer and to produce a special indication when a bonus is to be paid. The apparatus may include a number of independent indicators corresponding to a number of prices or ranges of prices. As shown, each drum 4 carries a number of indicating marks 3 which are sequentially exposed through an apertured member 2, the salesman effecting the step-by-step adjustment of the appropriate drum through gears 8, 9, 10, 11 rotated by a knob after each purchase. After a number of purchases of a standard amount, the corresponding drum exposes a different indication 3 at the window 2 and/or a bell may be rung. Each drum has a ratchet wheel 7 engaged by a pawl 6 to prevent reverse rotation.
Patent GB-496208-A (GB)
Title: Improvements in and relating to electric braking systems
IPC: B60L7/00
Filed: 1937-02-24
Abstract: 496,208. Brakes. BRITISH THOMSONHOUSTON CO., Ltd. Feb. 24, 1937, No. 5590. Convention date, Feb. 25, 1936. [Class 103 (i)] A vehicle brake is controlled by a relay 15 the energization of which is controlled in accordance with the load on the vehicle, the braking pressure being exerted and by manual means. The brake shown in the Figure, is an eddy current brake 3 brought into action and controlled by a resistor 8 engaged by a contact 71 operated by a piston and cylinder 5 controlled by fluid supply and exhaust valves 9 12. Windings 10, 13 of valves 9, 12 are normally energized by engagement of contact 16 of foot controller 14 with a contact 19 thereby the valve 9 is held closed and the valve 12 opened to exhaust the cylinder 5. Relay 15 is controlled by windings 25, 23, 24, 31. The winding 25 is energized by current controlled by the foot controller 14, the winding 23, is controlled by a load controlled rheostat 26 and the winding 31 is controlled by the amount of current supplied to the brake 3. Movement of the pedal 17 of the controller 14 to apply the brake breaks the circuit of windings 10, 13 so that exhaust valve 12 is closed and supply valve 9 is opened to raise the piston 6 making circuit for the brake 3 and as it rises cutting out resistance in the resistor 8 to increase the braking effort, until the energization of the winding 31 which is simultaneously supplied is sufficient with the force exerted by windings 23-25 to raise the relay and engage contacts 32, 34 which energizes winding 35 and recloses the valve 9. Current is supplied to windings 23, 24 by engagement of contacts 16, 22 when the foot controller is first operated. The effort exerted by the brake is varied by the pedal 17 by means of the resistance 21 which is cut in as the pedal is depressed, so as to decrease the energization of the winding 25 and require a larger current in the winding 31 and the brake to raise the relay. The resistance 26 has a similar action as the load is increased. When the pedal is released to release the brake the current is increased in the winding 25 and the relay is raised to engage contacts 32, 36 and energize winding 37 which opens the valve 12 to exhaust the cylinder 5. An anti-hunting arrangement comprises an impedance 40 included in the circuit of the winding 24 and winding 35, 37 of the valves. In a modification a fluid pressure brake cylinder is controlled by a similar arrangement except that the brake cylinder pressure acts directly on the end of the relay 15. Specification 212,898, [Class 103 (i)], is referred to.