baber/WOPTO huggingface dataset:
Patent GB-569905-A (GB)
Title: Radio receivers
IPC: H03J3/28
Filed: 1943-11-26
Abstract: 569,905. Wireless receiving circuits. STANDARD TELEPHONES & CABLES, Ltd. (International Standard Electric Corporation). Nov. 26,1943, No. 19766. [Class 40 (v)] A frequency changing arrangement for an electric wave receiver adapted to derive modulated intermediate frequency waves from modulated high frequency signal waves, comprises two frequency changing stages and two local oscillators therefor, one of the local oscillators being adapted to generate intermediate frequency waves, and the other local oscillator being adapted to generate waves of the said high frequency, means being provided for synchronising the last mentioned local oscillator by the signal waves. Fig. 3 shows an arrangement in which a modulated carrier wave of frequency fa is received at 1 and passes through a tuned input circuit 8 to a main frequency changer 2. The incoming signal is also used (as indicated by connection 7) to synchronise a generator 21 tuned to the same frequency, which supplies the frequency fa to an auxiliary frequency changer 22 the oscillator portion 20 of which supplies oscillations at the intermediate frequency fi. The output from the auxiliary frequency changer 22 is fed through a band-pass filter 5 tuned to fa-fi and having padding and trimming condensers. A further filter 6 excludes the frequency fi and the output is fed to the main frequency changer 2 where it is mixed with the modulated incoming signal fa to produce a. modulated intermediate frequency fi, which is taken off through tuned circuit 9. Fig. 4 shows an arrangement in which the modulated carrier signal fa is fed from the input stage 1 to an auxiliary frequency changer 12 where it is mixed with an intermediate frequency fi from a, fixed oscillator 23. The output, at a frequency fa-fi is mixed at 15 with the output of an oscillator 24 tuned to fa and synchronised by the input signal, the resulting intermediate frequency being produced.
Patent GB-864718-A (GB)
Title: Improvements in or relating to the purification of bacitracin
Inventor: ELLIOTT ARLEN RECTOR
Filed: 1959-06-09
Abstract: Bacitracin is purified by passing an aqueous solution of bacitracin having a pH of 2 to 10 through a strongly acidic cation exchange resin and a weakly basic anion exchange resin, the bacitracin being neither absorbed on said resins nor eluted therefrom, and drying the resulting solution to obtain solid bacitracin.  A fermentation broth is clarified and the pH adjusted first to pH 3,5 and then to pH 7,5 to precipitate impurities. The exchange resins are in the free acid and free base form.  The aqueous solution of bacitracin may be passed down a column of exchange resin in any order or simultaneously i.e. a column of mixed resins may be used.  The cation exchange resins may be those which contain nuclear sulphonic acid groups or methylene sulphonic acid groups e.g. phenol formaldehyde resins containing nuclear sulphonic acid groups or sulphonated aromatic hydrocarbon polymers such as sulphonated polystyrene resins e.g. " Amberlite " (Registered Trade Mark) 1R-120.  The anion exchange resins are weak amine or mixed amine type phenol formaldehyde resins e.g. Amberlite 1R-4B and Amberlite 1R-45.  Mixed resins are Amberlite MB-4, a mixture of Amberlite 1R-120 and Amberlite 1R-45.
Patent GB-723463-A (GB)
Title: Indexing mechanism
Inventor: RUMSEY ROLLIN DOUGLAS
IPC: B65B65/02
Filed: 1952-08-06
Abstract: 723,463. Intermittent toothed gearing. AMERICAN MACHINE & FOUNDRY CO. Aug. 6, 1952, No. 19777/52. Class 80 (1) In a step-by-step driving mechanism of the Geneva type, particularly for intermittently advancing the conveyer of a bread-wrapping machine, the rotating driving shaft 28 is keyed to an arm 14 carrying two or more planetary gears 20 and two or more spur gears 22 meshing therewith, each planetary gear engaging a stationary sun gear 18 while the shaft of each spur gear carries a crank disc on whose crank pin is a roller. 52 which engages slots 54 in the star wheel 10 to give a smooth intermittent drive thereto. As shown, the wheel 10 has four slots 54 and four locking portions 58, the latter being engaged by one of two segments 60 on the arm 14. A cover attached to the arm 14 supports the planetary and spur gears and forms with the arm a detachable sealed housing which is filled with oil or grease, the gears 20 being preferably grooved to prevent pumping. The sun gear 18 is loose on the hub of arm 14 and has an elongated hub to which is clamped a lever 32 having a forked end carrying two set screws engaging a fixed rod 38, thus providing means for adjusting the gear 18 to vary the timing. The shaft 56 of the star wheel 10 is supported in a flanged eccentric bushing 62 which is adjustably clamped to the machine frame so that the wheel 10 may be adjusted to or from the shaft 28 to eliminate play between the locking portions 58 and the segments 60. The shaft 56 may be geared to a conveyer shaft driving a pair of endless chains to which are secured lugs engaging the loaves of bread to be wrapped.
Patent GB-975780-A (GB)
Title: Improvements relating to air-cooled internal combustion engines
IPC: F01P7/08
Filed: 1963-05-17
Abstract: 975,780. Hydraulic clutch control. DAIMLER-BENZ A.G. May 17, 1963 [May 25, 1962], No. 19813/63. Headings F2C and F2L. [Also in Division F1] A cooling air blower 5 for an internal-combustion engine is driven through a hydraulic clutch 6 controlled by a temperature responsive device 30 and by means 24 dependent upon the position of the accelerator 11 and means are provided which suppress the effect of brief variations of position of the accelerator 11 on the clutch. The clutch 6 is a variable slip clutch, the filling of which is controlled by a means 14 including the temperature and accelerator responsive devices. The temperature responsive device 30 controls a throttle valve 18 in the supply pipe 7, 19, 7<SP>1</SP>, to the coupling 6 and the accelerator 11 is connected to a piston 23 which acts upon a valve 17, controlling the pressure drop across valve 18, through a spring 21. The valve 17 is loaded in space 25 by the pressure upstream of valve 18 by a pipe 26 with a throttling restriction 27 which damps movement of the valve 17 so that it does not respond to brief movements of the piston 23. If the pedal 11, controlling an injection pump 9, is depressed normally, the valve 17 follows piston 23 with a time lag to open passage 7<SP>1</SP> and increase the coupling filling to increase blower speed. The temperature responsive means 30 responds to the temperature of the heated air downstream of the cylinders and upon increase of temperature the valve 18 is moved to the left to increase the fluid supply and hence the blower speed.
Patent GB-1116855-A (GB)
Title: Control system for a hydrostatic converter
IPC: B60K17/10
Filed: 1966-05-05
Abstract: 1,116,855. Hydrostatic transmissions. X. FENDT, and H. FENDT. 5 May, 1966 [7 May, 1965], No. 19829/66. Headings F2D and F2L. A hydrostatic transmission comprises swashplate pump and motor units 1, 2 controlled by a servomotor unit 5 through a manual selector lever 23 and follow-up lever 12, with an additional override pedal 24 operable to reduce speed at any setting of lever 23 and also to open a by-pass valve 32 between the pump and motor for effecting an emergency stop. The pedal 24 operates upon a servo control link 15 through a heavily loaded spring 28, a lighter spring 19 in the main control linkage being compressed to prevent displacement of selector lever 23. For an emergency stop pedal 24 is fully depressed against spring 28 to operate a bell-crank 30 connected to the by-pass valve 32, which is thereby opened to break the drive. The crank 30 and valve 32 may also be operated by a brake lever 36. In a further arrangement, Figs. 2-6 (not shown), detent mechanism is provided for locking the selector lever in its neutral position.
Patent GB-1283031-A (GB)
Title: Battery chargers
Inventor: FOSTER ROBERT THOMAS
IPC: B61K7/22
Filed: 1968-04-26
Abstract: 1283031 Automatic voltage control JOSEPH LUCAS (INDUSTRIES) Ltd 22 July 1969 [26 April 1968] 19833/68 Heading G3R A battery charging circuit includes a bridge network connected across the battery and responsive to the battery voltage to control the gating signal to a thyristor which is connected in series with the battery. In the embodiment shown, a resistive bridge is constituted by the two parts of a potentiometer 23, a resistor 26 and a lamp 25, which may be replaced by a negative temperature coefficient resistor and a normal resistor in another part of the bridge. The variable point on the potentiometer is set so that when the voltage of the battery 18 is below the fully charged value, the bridge is out of balance, rendering a transistor 24 conductive and thus supplying gating current to the thyristor 19. When the desired battery voltage is reached, the bridge is balanced and the transistor cuts off so that charging ceases. As the transistor cuts off gradually, the charging current is reduced by phase control of the thyristor Thermistors may be used in the bridge or near the battery to provide thermal compensation.
Patent GB-188030-A (GB)
Title: Improved process for taking photographs and apparatus therefor
IPC: G03G17/02
Filed: 1921-07-23
Abstract: 188,030. Bronk, O. von. July 23, 1921. Negatives, producing by means other than photography; p h o t o - graphs, producing electrically.-Consists in a process for taking photographs wherein a film sensitive to electricity is exposed to the action of an electric current passed through a substance with which it is in contact or coated, and whose electric resistance is varied by the incidence of light upon it. An objective 8 projects an image upon a glass plate 1 coated with thin transparent metal 2 and a thin uniform layer 3 of a substance such as selenium whose electric resistance is affected by light. The metal coating 2 is connected through an electric battery 4 and switch 6 to a metal plate 5 between which and the composite plate 1, 2, 3 is interposed a film 7 carrying a material sensitive to electricity and prepared, for example, like the paper used in chemical copying telegraphs, by moistening paper with a solution of potassium iodide or a cyanide. The photograph is taken by passing the film 7 against the coating 3 by means of the plate 5, and closing the switch 6 for a predetermined length of time. In a modification, the coatings 2, 3 are dispensed with, and a film is employed containing a material sensitive to electricity and also a material whose electric resistance is affected by light. The current is led into this film through a grating of fine wires pressed against the back of the film, alternate members of the grating being connected together to form two series which are connected respectively through a switch to the poles of a battery. The film, being light-insensitive, may be handled in daylight. Salts sensitive to light may be added to the film coating to shorten the time of exposure.
Patent GB-381945-A (GB)
Title: Improvements in coal conveyors and the like
IPC: B65G27/00
Filed: 1931-07-10
Abstract: 381,945. Jigging conveyers. JENKS& CATTELL, Ltd., A. E., JENKS, G. B., and EVANS, J. O., Deans Road, Heath Town, Wolverhampton. July 10, 1931, No. 19861. [Class 78 (i).] In a conveyer in which each trough section A is provided with downwardly depending eyes C at one end and downwardly depending inverted U-pieces D at its other end, the bolt E which connects an eye on one section to a U-piece on the adjacent section is provided with a nut F which is coned at f to seat in a corresponding countersink in the U-piece. The bolt is secured in the eye by wedging or by shrinking the eye over it. The U-pieces D, Fig. 2, are formed in a single strip B1 riveted to the trough and bent so that each side of the U-piece is formed of a double thickness of metal. According to the Provisional Specification in a conveyer in which the drive is transmitted by ropes, the ropes may be passed through the U-pieces and secured thereto by fastenings.
Patent GB-1102861-A (GB)
Title: Computing devices
Inventor: GIRLING FRANK EDWARD JEX
IPC: G06G7/161
Filed: 1963-05-20
Abstract: 1,102,861. Logarithmic amplifiers. MINISTER OF TECHNOLOGY. 20 Aug., 1964 [20 May, 1963], No. 19911/63. Heading G4G. A logarithmic amplifier comprises: an exponential waveform generator 11, Fig. 3, for generating recurring, decaying exponential waveforms, Fig. 2(b); a comparator, e.g. 12A, for comparing the exponential waveforms with an input voltage; and a gate, e.g. 14A, controlled by the comparator output, Fig. 2(c), for gating a voltage V into a low-pass filter 15. The output from the gate 14A thus comprises a train of pulses, Fig. 2(d), the pulse duration of which is derived from the expression or t 1  = # log E - # log v  After passing through the low-pass filter 15, the D.C. component of the waveform of Fig. 2 (d) is Thus if in the amplifier/filter 15 a constant voltage V#logE/T is subtracted, Fig. 1 (not shown), and the amplifier gain is set at - r/#, the output voltage V 0  is given by V 0  = V log v. The arrangement is employed for computing AB the function -, where A, B, C are the inputs C to three of the channels. The outputs from the A and B channels are made relatively additive and those from the channels C and D subtractive by employing positive and negative voltages V respectively. The combined output from amplifier/filter 15 is and since this output is fed back as the input to the D channel, a balance state arises in which AB i.e. D = - which is the required computed C value. The computing circuit may be transistorized, and the exponential generator may comprise a series CR network.
Patent GB-946965-A (GB)
Title: Improvements in and relating to the reduction of metal oxides, particularly iron oxides
IPC: C21B13/08
Filed: 1961-06-02
Abstract: Lumpy metal ore is reduced, e.g. iron oxides to sponge iron, in an apparatus (see Division F4) through which a gaseous reducing agent, e.g. CH4, CO and/or H2, is passed countercurrent to the movement of ore wherein the aparatus comprises a preheating and preliminary reduction shaft furnace 3 directly connected with a final reduction furnace which is relieved from the load of the ore column.  The gaseous reducing agent, preferably containing not less than 60% by volume CO and H2, is introduced at a temperature of 1200  DEG C. into the final reduction furnace 4 which may be a rotary furnace (Fig. 1) inclined to the horizontal, or a vertical shaft furnace (Fig. 2) separated from the furnace 3 by a pressure sluice, e.g. a rotary plate 16 connected to a conveyer screw 17 for controlling the period of treatment. <PICT:0946965/C3/1> <PICT:0946965/C3/2>
Patent GB-640937-A (GB)
Title: Improvements relating to collapsible tables
IPC: A47B3/083
Filed: 1947-07-24
Abstract: 640,937. Picnic tables. SMITH, M. F. S. July 24,1947, No. 19959. [Class 52 (iii)] A table having tray-like top sections 1, 2, hinged together and foldable to form a box or case, is provided with a slidable bolt 9 extending across the hinge axis to hold the parts rigid when opened out. The legs 6 may be foldable or detachable and may be telescopically adjustable.
Patent GB-1074265-A (GB)
Title: Preparation or aldehydes and ketones
Inventor: SILVERSTONE GERALD ALFRED
IPC: C07C45/48
Filed: 1965-05-12
Abstract: Ketones and/or aldehydes are produced by heating at least one fatty acid with a catalyst comprising calcined magnesite, formic acid being present when an aldehyde is the desired product. Suitable fatty acids are the C1- 22 acids.  The process is preferably carried out by passing the acid(s), suitably in the presence of an inert carrier gas, over the catalyst at 300 DEG  to 500 DEG  C. In a modification, the fatty acids used are used in the form of volatile esters.
Patent GB-121286-A (GB)
Title: Improvements in or relating to Free Wheel Devices.
IPC: F16D41/08
Filed: 1918-12-03
Abstract: 121,286. Aktiebolaget Pump-Separator, (Assignees of Munters, A. J. E.). Nov. 14, 1917, [Convention date]. Void [Published under Sect. 91 of the Act]. Ratchet gearing.-In reversible roller r a t c h e t clutches or ratchet gearing for use with centrifugal separators, ratchet braces, engine turning-gear, &c., re-engagement of the clutch parts during overrunning is prevented (a) by a pin on the side plates or the like engaging within hollow clutch rollers, or (b) by pins on the rollers engaging recesses in the side plates. In the form shown in Fig. 5, hollow rollers 4, co-operating with flat or curved driving cam-surfaces 3 and a cylindrical driven casing 2, are engaged by pins 6 on a plate 9 adjustable relatively to the side plates, so that the pins may be brought to either end of slots 8 in the side plates in order that the direction of drive may be changed. Where pins on the rollers engage recesses or slots in the side plates, the side plates n.ay be adjusted for reversal.
Patent GB-1175202-A (GB)
Title: Improvements to Apparatus for Feeding Cigarettes.
Inventor: MOLINS DESMOND WALTER
IPC: A24C5/35
Filed: 1966-01-14
Abstract: 1,175,202. Feeding Cigarettes. MOLINS MACHINE CO. Ltd. 13 Jan., 1967 [14 Jan., 1966], No. 20002/69. Heading B8A. Cigarettes are fed from the left by upper and lower endless belts 4 and 3 and are discharged down shoots 1 and 2 to packing machines, the movement being further assisted by upper and lower belts 17 and 16. Any surplus of cigarettes is accommodated by floats 36 and 43 which move upwards to accommodate the surplus of cigarettes and at the same time float 36 operates a switch to reduce the speed of belts 4 and 3 and float 43 operates a switch to switch off belts 19 and 18. Element 28 is agitated by cam 33 to agitate the cigarettes which are also agitated by roller 14.
Patent GB-1338490-A (GB)
Title: Production of 1,1-peroxydicyclohexylamine
IPC: C07D273/00
Filed: 1971-04-19
Abstract: 1338490 Production of 1,1<SP>1</SP>-peroxydicyclohexylamine and caprolactam DEUTSCHE GOLDUND SILBER-SCHEIDEANSTALT 19 April 1971 [26 Jan 1970 31 Jan 1970] 20012/71 Heading C2C 1,1<SP>1</SP>-Peroxydicyclohexylamine is produced by reacting an anhydrous solution of hydrogen peroxide in cyclohexanone with gaseous ammonia or liquid ammonia in the absence of a catalyst. Caprolactam may be obtained from the product by splitting.
Patent GB-694228-A (GB)
Title: Improvements in or relating to hydraulic braking systems
IPC: B60T11/10
Filed: 1951-08-24
Abstract: 694,228. Controlling motor vehicles. BENDIX AVIATION CORPORATION. Aug. 24, 1951 [Sept. 14, 1950], No. 20025/51. Class 79(v) [Also in Group XXXIV] In a vehicle wherein the hydraulic brakes are automatically applied should the vehicle start to move with its doors open, it is arranged that should the doors be opened when the vehicle is in motion, the brake application is confined to the rear wheels and applied at a reduced pressure. In the drawing, a hydraulic pump 10 draws liquid from a reservoir 14 and pumps it to an accumulator 18, the pressure in which is governed by an unloader valve 20. A conduit transmits pressure liquid from the accumulator 18 to a pipe 62 in a driver's control valve 22 which governs the flow by pipe 64 to the brake cylinders on the front and rear wheels 24 and 26 respectively. Pressure is, however, applied to the rear wheel brake cylinders by way of an interlock valve 118, of generally similar construction to valve 22 but having hydraulic operation in place of the pedal 96. During a normal brake application, pressure liquid supplied through pipe 64 to the interlock valve, after passing initially through the axial channel in the piston valve member 284, generates pressure above same and forces it down against spring 208 thus opening up a full flow passage to the rear wheel brake cylinders which are applied at the same pressure as the front brake cylinders. When a vehicle door is opened switch 154 closes and by relay switch 156 makes the circuit from battery 152 to contact 167 thus energising solenoid valve 130 to open same to allow pressure liquid from the line 62 to flow from connection 145 to connection 146 and thence to port 126 in the interlock valve below its piston member 124. The piston member 124 is thus raised compressing spring 208 and raising also the plunger 284 so that a ball valve 280 is closed and a ball valve 279 opened to allow pressure from the accumulator 18 to pass direct to the rear wheel brake cylinders, the front wheel brake cylinders being inoperative. After some time the accumulator pressure acting above plunger 284 depresses same and tends to reclose the ball valve 279. When the vehicle door 164 is reclosed, the contact 157 is closed instead of 167, so that solenoid valve 142 is energised to allow flow of liquid away by passage 147 and port 149 to a return line to the reservoir 14.
Patent GB-148758-A (GB)
Title: Improvements in and relating to signalling systems
IPC: H03C1/10
Filed: 1920-07-09
Abstract: 148,758. British Thomson-Houston Co., (Assignees of Armor, J. C.). Oct. 14, 1913, [Convention date]. Void [Published under Sect. 91 of the Act]. Telephonic repeaters. - Relates to magnetic controllers for controlling the amplitude or frequency, or both, or emitted waves in wireless telephony. The controller has one or more high-frequency windings, and two direct-current windings, one of which is supplied with steady current, and the other with speech currents. Transformer action between the high and low frequency windings is prevented by the method of winding. In the arrangement shown in Fig. 1, the high-frequency winding of the controller 11 is in the aerial circuit 8, one direct-current winding being in circuit with a battery 17 and microphone 18, and. the other in circuit with battery 17, reversing- switch 19, inductance 20, and resistance 21. In a modified arrangement, shown in Fig. 2, there are two high-frequency windings, one directly in the aerial circuit 8, and the other in the oscillation circuit 2 of a spark-generator having a high group frequency. The direct-current windings are connected as before. In this arrangement, the controller serves as a coupling-transformer between the aerial and oscillating circuits. In a further modification, the controller acts as an autotransformer coupling between the two circuits. The laminated core of the controller is built up of circular or square punchings having two pairs of holes 13, 14 at right-angles, through which the windings are threaded, the flux produced by the high-frequency windings through the holes 13 being substantially at right-angles to that produced by the direct-current windings through the holes 14, transformer action between these sets of windings being thus avoided. In another form, Fig. 7, the high-frequency windings 8 are threaded through holes 28, the other windings 15, 16 being wound around the core as in a Gramme-ring armature. In Fig. 9, the punching has sectorial holes 31, through which the windings 15, 16 pass, the high-frequency winding 8 being wound round the central part of the core. In Fig. 10, the highfrequency winding 8 passes around the two legs 35 of the core, and the other windings 15, 16 around the central limb 36.