baber/WOPTO huggingface dataset:
Patent GB-1070799-A (GB)
Title: Isolation of the antibiotic levorin from a fermentation broth
Inventor: KULJBAKH VALJTER OSVALJDOVICH
IPC: C07G11/00
Filed: 1964-05-15
Abstract: The antibiotic levorin is isolated from a fermentation broth of Streptomyces levoris Kras. by adding diatomite to the whole broth, filtering off the mixture of mycelium and diatomite, washing with methylene chloride to remove oily impurities and levoristatin and extracting with aqueous alcohol or aqueous ketone, e.g. aqueous isopropanol or aqueous acetone.  Preferably the broth is adjusted to pH 5.5 to 5.8 before the diatomite is added.  The levorin is recovered from the solvent extract by (a) concentration at 35-40 DEG C. and 20-30 mm. Hg and cooling to 4 DEG  C., or (b) addition of water.  Levorin may be further purified by washing with methylene chloride.
Patent GB-299528-A (GB)
Title: Improvements in or relating to machines for applying adhesive tape to sheet material
IPC: A43D43/06
Filed: 1927-08-02
Abstract: 299,528. British United Shoe Machinery Co., Ltd., (Boston Machine Works Co.). Aug. 2, 1927. Affixing tape.-A machine for applying adhesive tape to sheet material, of the kind described in Specification 220,502, is provided with means for severing the tape which are operated by the tapeapplying means under the control of the operator, and with means for feeding the cut end of the tape to applying position which are actuated from the tape applying means and brought into operation by the severing means. The tape is applied by means of a head 7 co-operating with a work support 1, the head being actuated from a cam shaft 14. The tape 3, fed round a shaped member 5, is severed by a pair of cutters 16, 18 the latter of which is slotted and fixed, while the former is reciprocated vertically by a strut 28. The latter, normally in the position shown, can be moved to the right by means of a catch 35 pivoted to a lever 32 operated by depressing a part 34 manually. Movement of the strut 28 to the right brings a depression 29 into engagement with a member 26 carried by the constantlyreciprocated head 10, thus causing the knife 16 to descend and sever the tape; this downward movement also frees the end of the strut 28 from the catch 35 and the former is restored to inoperative position by a spring 30. Movement of the strut 28 also actuates a pivoted member 42 which is provided with a tape-feeding finger 40 and is pivotally connected to a link 53 having nose 63 normally lying in the path of a pin 62 on a pawl 59, and rendering it inoperative. The pawl is carried on the reciprocating head and is adapted to ensage a ratchet 56 when the link 53 is moved out of the path of the pin 62. The ratchet is furnished with a crank pin 55 riding in a slot in the link 53, so that the movement of the member 42 by the strut 28 moves the link 53 out of the path of the pin 62 and renders the pawl 59 operative; the ratchet 56 is thus rotated and the member 42 operated to feed the tape. The movement of the member 42 ceases when the link 53 again resumes the position shown, and prevents rotation of the ratchet 56 by engaging the pawl 59.
Patent GB-903213-A (GB)
Title: Improvements in or relating to shock absorbers
Inventor: DICKINSON RONALD SIDNEY
IPC: F16F9/18
Filed: 1960-06-09
Abstract: 903,213. Hydraulic shock absorbers. ARMSTRONG PATENTS CO. Ltd. Feb. 1, 1961 [June 9, 1960], No. 20313/60. Class 108(3). A telescopic hydraulic shock absorber comprises a piston 22 which works in a pressure cylinder 10 and one-way valve arrangements 14, 24 in a plug 12 for the cylinder 10 and the piston 22 respectively which cause the hydraulic fluid to flow unidirectionally, in a continuous closed circuit, through the piston 22 and the cylinder 10 and a concentric reservoir 16, defined by an outer cylinder 18 and the cylinder 10, and from the reservoir 16 back into the cylinder 10 the fluid circuit also including a flow-restricting or metering valve 38. During a compression stroke, with the valve 14 closed and the valve 24 open fluid, equivalent to the piston rod displacement, passes through - a passage 34 in a. sealing gland 28, which closes the piston rod end of the cylinders 10, 18 and sealingly accommodates the rod 26, and into a tube 36 which discharges into the adjustable metering valve 38 mounted in the cylinder 18. The valve 38 has an axial passage 40 provided with a valve seat 42 for a needle-type valve 44 which is axially displaceable by a screw-cap 46 detent means 48 on which define multiple positions. The tube 36 is provided with a filter 37. The adjustable valve 38 may be replaced by a fixed orifice or by a spring-loaded plate valve. Alternatively a metering valve 38 may be used in conjunction with another tube similar to the tube 36 and having a spring loaded plate valve or a fixed orifice at its free end. The cross-sectional-area of the piston rod is chosen to be one half of the area of the bore of the cylinder 10. When the shock absorber is to be used in a horizontal position the outer cylinder 18 may carry an auxiliary reservoir 58 to prevent cavitation in the reservoir 16 and guard against losses past the gland 28.
Patent GB-204025-A (GB)
Title: Improvements in heat-exchanging apparatus
IPC: F28F9/22
Filed: 1923-08-10
Abstract: 204,025. Griscom-Russell Co., (Assignees of Sward, C. W.). Sept. 18, 1922, [Convention date]. Straight tubes between headers; longitudinal baffles, arrangement of; headers; straight tubes p a s s i n g through helical baffles.-In a surface apparatus comprising a tube stack 2 and a casing 1, the header 8 has a partition such as 9 forming chambers 10, 11, communicating with two groups of tubes, for example a central group of tubes and an outer group, which may be separated by a cylinder baffle 15. The other header 7 is capable of longitudinal movement in the casing to acconmodate expansion. Baffles 17, 18 among the two groups of tubes direct the fluid across the tubes in a circuitous path, passing the tubes a plurality of times always with the same direction of flow. In the Figure this passage is in a downward direction from the inlet 14 and upward within the baffle 15 to a compartment above an annular disc 19 leading to the outlet 16. Specifications 142,715 and 176,753 are referred to.
Patent GB-706471-A (GB)
Title: Improvements in or relating to heat interchange
IPC: F22B1/18
Filed: 1949-08-05
Abstract: 706,471. Screw fans. SPOONER, W. W. Aug. 2, 1950 [Aug. 5, 1949], No. 20367/49. Class 110 (1). [Also in Group XIII] A fan circulating hot gases repeatedly in a closed circuit over heat exchange tubes 42 (see Group XIII) is constructed either as described in Specification 706,474 or in the modified form shown which comprises three rings of blades 32, 33, 34 all set in the same direction.
Patent GB-710960-A (GB)
Title: Improvements relating to magnetic lens arrangements
IPC: H01J37/143
Filed: 1951-08-29
Abstract: 710,960. Electron lenses. SIEMENS &HALSKE AKT.-GES. Aug. 29, 1951 [Aug. 29, 1950], No. 20402/51. Class 39(1) [Also in Group XXXV] A magnetic lens arrangement, preferably for use in an electron microscope, comprises a permanent magnet having at least one pair of pole shoes which are fixed relatively to the magnet but which are structurally separate members, a regulating member adjustable by external means to vary the refractive power of the lens connected in series in the magnetic circuit, and a magnetic casing connected to one pole of the magnet. The regulating member may be rotatable and/or axially movable. In one form, Fig. 1, the four lenses 1, 2, 3, 4 are energized by means of two annular permanent magnets 13, 14 co-operating with pole piece members 5, 8, 9, 10, 6 and enclosed within a jacket 7 of magnetic material, which may be constructed in two parts, as shown. Pole piece member 9 is held in position by a magnetic ring 40. An annular member 15 shunting the magnetic circuit can be moved along the axis to vary the focusing of the objective lens 1. 4 is the projection lens. The rotary regulator 17 for varying the image magnification comprises fixed teeth connected to the casing 7 and co-operating rotatable annular toothed member 26 mounted on magnetic ring 40. The ends of the teeth which may be in contact or separated by a small distance in the position of maximum flux flow may be bevelled or cylindrical, Figs. 2, 3 (not shown). In another form, Fig. 4, the two sets of teeth are replaced by arms 25 pivoting about axes 24. In another form, Fig. 5, permanent magnets 31, 32 are associated with three rotary regulators 33, 34, 35; 36, 37; 38, 39, the first two serving for adjusting the final image magnification and the third for focusing. 33, 34, 35 comprises two fixed and one movable toothed rings 34, 35; 33. The regulators'may have scales calibrated to indicate image magnification. Apertures 41 allow the cathode region to be exhausted if for example the vacuum pump is connected beyond the projection lens 4. In further modifications, an annular regulating member without teeth may be movable axially. The pole pieces may be composite i.e. separate pole shoes attached to supports. Prior art arrangements in which regulators are employed to adjust permanent magnetic lenses in electron microscopes are referred to, for example for adjusting the objective for focusing or the projection lens for varying the image magnification. They may consist of: (a) An adjusting mechanism operating by variation of stray flux external to the lens housing or (b) an axially movable part of a pole piece.
Patent GB-251227-A (GB)
Title: A process for rendering nitro-cellulose yarns incombustible
IPC: D06M11/56
Filed: 1925-08-14
Abstract: 251,227. Lavaud, J. R. April 23, 1925, [Convention date]. Cellulose nitrates, processes for making filaments from.- Nitrocellulose yarns are reudered incombustible by treatment with the following baths in the order mentioned :- A solution of formic or acetic acid, a solution of an alkali metal sulphide and magnesium sulphate, a solution of an alkali metal hydrosulphite, a solution of aluminium chloride, and finally a solution of ammonium carbonate, boric acid and borax.
Patent GB-614215-A (GB)
Title: Manufacture of polyureas
IPC: C07C273/18
Filed: 1946-07-09
Abstract: Crystalline polyureas are obtained by heating nitrourea with polyalkylene polyamines containing only primary or secondary amino groups separated by hydrocarbon chains of at least two carbon atoms. The reaction may be effected by heating the reagents together in aqueous solution, the proportion of nitrourea being at least sufficient to convert all the amino groups of the polyamine into ureido groups.  Examples are given of the manufacture of polyureas from diethylenetriamine, triethylenetetramine, 1 : 2 : 3 - triaminopropane and tetra-(aminomethyl)-methane.  Other specified starting materials are tetra - (methylaminomethyl) - methane and bis - hexamethylenetriamine.  Specification 604,214, [Group IV (a)], is referred to.
Patent GB-1394551-A (GB)
Title: System for providing a digital representation of an analogue  frequency of an unknown signal
IPC: G01S15/58
Filed: 1973-04-30
Abstract: 1394551 Digital measurement of frequency BENDIX CORP 30 April 1973 20465/73 Heading G4H A circuit for measuring the frequency f x  of a signal comprises a zero crossing detector 10, the period of the output of which varies with the frequency f x , gates 14, 18 for receiving a reference frequency signal, a flip-flop 12 for enabling the gates to transmit the reference frequency signal for the period of the detector 10 to counters 22, 24 and control gates 16, 20 for transferring the counts stored in the counters to a digital to analogue converter 26. The circuit may be part of a sonar system in which the signal of frequeney f x  is the signal reflected from a moving object. The output pulses from the flip-flop 12 alternately open the pairs of gates 14, 16 and 18, 20 to supply the digital measurement of the frequency stored in the counters 22, 24 to the converter 26. The output of the converter may be supplied to a meter, Fig. 4 (not shown), via a low pass filter and to a comparator, the reference input of which receives a signal corresponding to a minimum Doppler frequency. Signals of a frequency exceeding this reference frequency are supplied to the video gate of a cathode-ray tube circuit. Modifications of the circuit are described to prevent signals corresponding to frequencies outside a predetermined range from being supplied to the converter 26, thereby eliminating frequency measurements corresponding to noise signals.
Patent GB-1184999-A (GB)
Title: Lifting Spreader
IPC: B66C13/08
Filed: 1968-04-30
Abstract: 1,184,999. Rotatable container spreaders. FRUEHAUF CORP. 30 April, 1968 [6 June, 1967], No. 20474/68. Heading B8H. A rotatable spreader frame for handling containers has upper and lower frames 19, 27, coupled together by bearing rings 23, 29 and ball bearings 31, and the lower frame supports container engaging spreaders of various sizes and with a variety of container engaging means. The frames 39 are readily attached to the frame 27 by lugs 43 and pins 41. A motor 35, pinion 37 and ring gear 33 on the inside of the bearing ring 29 rotate the frame 27 with respect to the frame 19. Guides may be provided on the spreader frame as disclosed in Specification 1,132,814.
Patent GB-1509176-A (GB)
Title: Radiography
IPC: A61B6/03
Filed: 1974-05-09
Abstract: 1509176 Radiography EMI LTD 1 May 1975 [9 May 1974 12 Nov 1974] 20479/74 and 49024/74 Heading H4F Radiological apparatus of the type described in Specification 1,283,915 in which a body is irradiated (e.g. by X-rays) along a plurality of co-planar and intersecting paths and in which the transmitted radiation along each of these paths is detected to generate electrical signals indicative of the body absorption values which are operated upon to produce respective altered signals which are susceptible to additive superposition, wherein a respective line of charge indicative of each altered signal is deposited upon the target of a charge storage tube 16 at a position and orientation corresponding to that of the radiation path through the body to which the respective altered signal relates, the resulting accumulated charge pattern on the target being then read out and the resulting output signal displayed 10. As shown edge readings in digital form representing the absorption suffered by the radiation on traversing each path through the body are stored in a magnetic disc store 2 before they are passed to a computer 3 which alters them into a form which permits of additive superposition e.g. using the convolution technique described in Specification 1,471,531. The resulting negative and positive signals derived by subtracting a chosen zero threshold level (keyboard 4) from the computed (altered) signals are either stored on the target of one tube 16 (or alternatively on separate storage tubes, Fig. 1, not shown), each signal value being stored as a line of charge on the target oriented in a corresponding manner to the orientation relative to the body of the path from which the edge reading was derived. When all the edge readings have been so stored the information is read out and displayed on monitor 10. To increase the accuracy of the displayed image the final values for each resolveable element of the storage tube target along each beam path are read from the storage tube and summed to give pseudo edge readings which are then compared with the corresponding true edge readings retained in store 2 and any difference used to update the information stored in store 2. Electronic "cross wires" may be added to the display by selecting coordinate positions using key board 11 and an equality detector 12.
Patent GB-393109-A (GB)
Title: Improvements in or relating to means for controlling time mechanisms in accordance with the frequency of an a.c. supply
IPC: G04C11/08
Filed: 1932-07-20
Abstract: 393,109. Electric clocks. SIEMENSSCHUCKERTWERKE AKT.-GES., Siemensstadt, Berlin. July 20, 1932, No. 20519. Convention date, July 20, 1931. [Class 139.] Synchronizing hands; winding - apparatus, electric.-The hands of a timepiece are periodically concorrected by a comparison mechanism driven by by a synchronous motor fed from a frequencyregulated supply, the time between successive correcting movements being small, for example ten seconds. The motor may also be used to wind up the driving spring of the timepiece. The timepiece 1 regulated by the pendulum 2 drives through a friction clutch 4 a star-wheel 6 rotating once a minute, a pinion 5 rigid with 6 driving the hands 8 through gearing 7. The synchronous motor 26 drives through gearing 25 a wheel 23 which makes six revolutions a minute. A crank 22 carried by a shaft 30 eccentric with respect to wheel 23 is adapted to coact with an eccentric pin 24 carried by the latter. A part clockwise rotation is thereby imparted to shaft 30 during each revolution of wheel 23, the shaft being immediately returned to the position shown, when the crank is released from the pin 24, by a biasing spring 17 acting through a pivoted sector 18 coacting with a stop 21, and a pinion 19. The handsetting mechanism comprises a roller 10 carried by an arm 9 oscillatable about an axis 91 and rigid with an arm 13 carrying a leaf spring 15 coacting with a stop 14. During clockwise rotation of shaft 30 the spring 15 yields to the stop 31 of an arm 16 carried by the shaft, but during the rapid anticlockwise movement of the shaft the arm 16 rocks the lever 13 clockwise, the roller 10 is rocked between the projections of the star wheel 6 to effect the adjustment of the hands, and the arm 9 returned to abut against a stop 12 by a spring 11. The star-wheel is provided with six projections as the speed thereof is one-sixth that of wheel 23, but according to a modification the relative speeds may be such that an integral number of projections pass the roller 10 between successive correcting movements thereof. A crank 27 mounted on shaft 30 winds up the timepiece 1 through a lever 282, pawl 28, and ratchet wheel 29, the pawl biasing spring 281 yielding against the reaction of the driving spring of the timepiece when the latter is fully wound, to prevent overwinding.
Patent GB-614142-A (GB)
Title: Improvements in or relating to machines for horticultural and like purposes
IPC: A01C7/16
Filed: 1946-07-09
Abstract: 614,142. Manure and like distributers. HALFORD, E. A. July 9, 1946, No. 20538. [Classes 6 (i) and 6 (ii)] A lawn-sweeping machine comprises a frame supported on wheels 12, having a rotary brush 20 and a hopper 50 for distributing seed or sand. The brush is driven from the wheels 20 which also drive a rotary agitator 55 inside the hopper 50. For releasing the seed, a perforated plate 59 may be brought into varying degrees of register with perforations in the base. The plate 59 is linked to an operating lever 75, and the amount of opening indicated by a needle 72 and calibrations on a plate 70 secured to the end of the hopper. Handles 24 are provided and the height of the brush is variable. A box behind the brush collects leaves, &c.
Patent GB-917893-A (GB)
Title: An improved means for measuring recesses in an electrically conductive surface
Inventor: GOODE FRANCIS NORMAN
IPC: B41M1/10
Filed: 1960-06-13
Abstract: 917,893. Determining physical qualities of materials. SUN PRINTERS Ltd. Sept. 13, 1961 [June 13, 1960], No. 20683/60. Class 37. The integrated characteristic of the recesses in an area of an electrically conductive surface such as the intaglio cells of a gravure printing cylinder, is measured by measuring the capacitance between a test unit or so-called " probe," and the area to be tested. The test unit or probe shown in Fig. 1 comprises a bottom casing 3 closed at the top and bottom by flexible dielectric material 17, 1 and filled-with mercury. 2. When the casing is associated with the conductive surface 5, the mercury 2 and the surface 5 form the plates of a capacitor, which plates are separated by the dielectric material 1. The mercury not only serves as the plate of a capacitor but also provides the necessary pressure to hold the dielectric 1 in firm contact with the surface to be tested. In a modification (Fig. 3, not shown) mercury is dispensed with, the dielectric 1 being provided with a metallized portion to act as a capacitor plate and being held in contact with the area under test by air pressure. As described, the capacitance is measured by an A.C. bridge circuit including a transistor oscillator and a transistor amplifier.
Patent GB-1126685-A (GB)
Title: Improvements relating to controlled signal transfer circuits, especially video signal fading circuits
Inventor: CHANOT GRIFFITH JOHN RAYMOND
IPC: H04N5/265
Filed: 1965-05-17
Abstract: 1,126,685. Gain control. ELECTRIC & MUSICAL INDUSTRIES Ltd. 17 May, 1966 [17 May, 1965], No. 20687/65. Headings H4J and H4R. In a variable attenuator circuit comprising shunt diode 8 and series diode 9 the attenuation of which is varied by controlling the potential on the anode of diode 9, thereby varying the ratio of the currents supplied to diodes 8 and 9 from the constant current source constituted by Zener diode 42 and resistor 18, a similar diode pair, 29 and 30, is subjected to the same control signal, applied to the anode of diode 30 via resistor 28, but with no signal applied thereto, and the outputs of the two diode circuits are combined via transistor differential amplifier 33, 34, and 12, so that transients produced at the signal channel output and fed to transistor 12, due to variations in the control signal, are cancelled by similar transients produced in the diode pair 29 and 30 and fed to transistor 33. The signal is fed to the diodes 8 and 9 from the collector circuit of a transistor 3 and capacitive leakage through diode 9 is cancelled by an antiphase signal from the emitter circuit of transistor 3 fed to the anode of diode 9 by capacitor 70. The gain control signal is derived from a manually adjustable resistor 20 via an emitter follower 23. The outputs from a number of similar variable attenuator circuits may be combined, in which case the maximum signal level after combination is restricted by feeding the emitter followers 23 of all the attenuator circuits from a common constant current source, i.e. the transistor 59 of Fig. 1c, whose output is insufficient to supply the current required if all the gain controls are turned to maximum. The gain control potentiometers 20 may be fed from the emitter follower 60 of Fig. 1c, so that the maximum gain available is controlled by potentiometer 55. Automatic operation may be effected by switching the appropriate waveform to the base of emitter follower 23.
Patent GB-841933-A (GB)
Title: Device for meshing corrugated tapes
IPC: B21C37/24
Filed: 1958-06-27
Abstract: 841,933. Sheathing cable; corrugating. WESTERN ELECTRIC CO. Inc. June 27, 1958 [July 9, 1957], No. 20716/58. Classes 83 (2) and 83 (4). In a device for intermeshing two corrugated metal tapes being drawn into a cable sheathing machine, separate tensioning-means are used for each tape, and each includes a toothed idler output roll interconnected so as to retard the free rotation of either when the tape in engagement therewith has more corrugations per unit length than the other tape, thereby relatively stretching the tape as it leaves the roll so that the respective corrugations intermesh. A strip of aluminium 3 is corrugated by rolls 5, 6 passed over an idler roll 9 looped under a tensioning roll 11 and passed from an idler output roll 21 to a cable sheathing machine 45. The rolls 5, 6 are driven by a motor. 7 whose speed is controlled by a lever 8 which is moved by a pivoted and weighted lever 12 carrying the roll 11 so that the speed of the rolls 5, 6 is increased as the lever 12 is raised. A steel tape 23 is similarly corrugated and supplied to the machine 45, being intermeshed with the aluminium tape after both have left their respective output rolls 21, 41 which are interconnected by a chain and sprocket for synchronous rotation. The input idler rolls 9, 29 may actuate an indicator 55 which registers the differences in the rates at which corrugations are produced in the two tapes. Specification 628,433 is referred to.