baber/WOPTO huggingface dataset:
Patent GB-899888-A (GB)
Title: Ultra high frequency heating apparatus
Inventor: DUNSMUIR ROBERT
IPC: H05B6/78
Filed: 1959-07-31
Abstract: 899,888. Heating strip material dielectrically. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. July 29, 1960 [July 31, 1959], No. 26391/59. Class 39(3) A dielectric heating apparatus for strip material comprises a plurality of waveguide sections 11-15 into which v.h.f. energy may be fed from generators 16, 17; each waveguide section being provided in opposite side walls with lengthwise extending slots through which the strip to be heated is passed, the arrangement is such that a strip passing through the plurality of sections is heated more intensely near one side edge and then more intensely near the other side edge as it passes from section to section so that the total heating across the strip is rendered more uniform when the strip has passed through all the sections than that obtained when the strip is heated in one section only; the arrangement for feeding the energy through the section is such that standing waves are not formed within the waveguide sections. The relative intensities of the energy are indicated by the Figures in circles across each waveguide section and if desired the central section 13 may contain a non-reflective waveguide termination 18 alternatively the energy streams are 100% dissipated in each half of the apparatus. An embodiment is described in which a single source of energy is used.
Patent GB-995418-A (GB)
Title: Improvements relating to circuits for generating sawtooth waveform currents
IPC: H03K4/71
Filed: 1961-07-21
Abstract: 995,418. Transistor sawtooth circuits. TELEFUNKEN PATENTVERWERTUNGS G.m.b.H. July 21, 1961 [July 21, 1960], No. 26453/61. Heading H3T. A sawtooth current generator of the magnetic Miller type uses an amplifier comprising transistors 3, 4 with feedback via a capacitor C6. A field timebase for a television receiver is described comprising a blocking oscillator using transistor 11, synchronized at 28 and coupled via a diode 21 to the amplifier 3, 4 which feeds field deflection coils 1. Diode 21 is turned on by each pulse from 11, thus charging C6 via resistors R1, R10. C6 discharges via resistors R8, R9, R10 during each sweep. Linearity is improved by connecting R10 in a circuit common to both transistor 3 and the discharge path.
Patent GB-671973-A (GB)
Title: Improvements relating to the use of photo-electric cells
IPC: H01J40/14
Filed: 1949-10-14
Abstract: 671,973. Photo-electric apparatus. TRIST & CO., Ltd., R., CHAMBERS, W. A., and CLARKE, A. G. Oct. 12, 1950 [Oct. 14, 1949], No. 26497/49. Class 40 (iii). A detection system employs a gas-filled photo-electric cell connected across a condenser charged through a high resistance to a potential such that when the cell is illuminated above a predetermined datum level, the condenser discharges through the cell to produce brief periods of glow discharge. When the illumination varies from one side to the other of the datum level there is a change in the current drawn from the condenser, the change being used to operate a relay controlling a warning device. In Fig. 1, condenser 2 is charged through resistance 6 to a potential such that when the cell is unilluminated, glow discharge is just not produced. As soon, however, as a small quantity of light falls on the cell, glow discharge is initiated, causing condenser 2 to discharge periodically through the cell. The current flow operates relay 4 which holds over the circuit through resistance 11. Contacts 7 complete the circuit for alarm device 8. Switch 10 releases the relay to re-set the circuit. As a burglar alarm the device is included in a receptacle such as a safe which when closed is normally dark. As a smoke detector, Figs. 2 and 3 (not shown), the cell is disposed so as normally to be unilluminated, with its surface just below a parallel beam of light projected across a chamber through which the smoke-laden air may percolate. The smoke particles cause scattering of the light and slight illumination of the cell. In a second system, Fig. 4, designed to be responsive to a small decrease in illumination, the potential on condenser 32 is such that with normal illumination glow discharge occurs in cell 31 resulting in a periodical discharge of the condenser. The discharge current pulses operate relay 34, condenser 33 functioning as a smoothing condenser to hold the relay permanently energized. A reduction in the cell illumination stops the discharge and releases relay 34. Contacts 37 complete the circuit for relay 52 which operates an alarm device 38 over contacts 53. Relay 52 holds over the circuit through resistor 54. Switch 55 releases the relay to re-set the circuit. This device may function to detect the interruption of a beam of light by smoke or a burglar, Fig. 5 (not shown). As a burglar alarm the beam is restricted to infra-red light.
Patent GB-656212-A (GB)
Title: Improvements in or relating to high voltage electrostatic apparatus and method of operating same
IPC: H02N1/12
Filed: 1948-10-12
Abstract: 656,212. Discharging static electricity. STEVENS, A. H. (Research Corporation). Oct. 12, 1948, No. 26537. Drawings to Specification. [Class 35] The generated charge is removed from the charge carrier of a belt-type generator operating under increased gas pressure by means of a row of transferring points situated very close to each other and as close as possible to the belt. In one form a row of wires of 0.005-0.010 inch diameter and spaced from each other and the charge carrier by 0.02 inch is used. The individual points may be connected through resistive or inductive impedances or the wires may be kinked or twisted to increase their impedance. In a modified form the row of individual wires is replaced by a fine wire mesh. The charge may be modified prior to its removal from the belt by means of a screen running parallel to the belt. Specification 539,790 and U.S.A. Specification 1,991,236 are referred to.
Patent GB-1241134-A (GB)
Title: Olefin polymerisation catalyst
IPC: C08F10/00
Filed: 1969-05-23
Abstract: 1,241,134. Polymerization of olefins. MITSUBISHI CHEMICAL INDUSTRIES Ltd. 23 May, 1969 [25 May, 19681, No. 26587/69. Heading C3P. Olefins are polymerized at a temperature from ambient to 250‹ C. and a pressure of 1-100 atmospheres in the presence of a catalyst composition comprising (a) chromium oxide supported on a heat resistant oxide and (b) an organoaluminium compound of the general formula R 2 AlOR wherein each R is independently a hydrocarbon, preferably having 1-14 carbons. Examples describe the polymerization of ethylene, optionally containing a small amount of propylene, in a n-heptane solvent in the presence of hydrogen, using as catalyst chronic anhydride (CrO 3 ) supported on silica and methoxydiethylaluminium, ethoxydiethylaluminium, methoxydiisobutylaluminium and phenoxydiethylaluminium.
Patent GB-753189-A (GB)
Title: Process and photographic material for the direct production of positive photographic images
IPC: G03C5/50
Filed: 1954-09-14
Abstract: 753,189. Direct production of positive photographic images. AGFA AKT.-GES. FUR PHOTOFABRIKATION. Sept. 14, 1954 [Sept. 16, 1953J, No. 26643/54. Addition to 690,997. Class 98 (2). Instead of exposing a mixed emulsion layer containing up to 10 per cent of a higher lightsensitive silver salt such as silver bromide and the rest of a lower sensitive salt such as silver chloride, and processing in a developer containing a solvent such as sodium sulphite of higher dissolving power for the lower than the higher sensitive silver salt and containing substantially no salts such as bromides with anions the same as those of the higher sensitive silver salt; whereby the lower sensitive salt is blackened in unexposed places only as a result of release of salts such as bromides by the development of the higher sensitive layer, to give the positive of the main invention, as described in the parent Specification; the higher and the lower sensitive silver salts are provided in separate layers which may be superimposed or may lie on separate supports, and the higher sensitive layer is removed during or after processing, to leave a positive image in the lower sensitive layer with whites unfogged by the developed image of the higher, sensitive layer. Generally the higher light-sensitive silver salt does not exceed 10 per cent of the lower but more may be used in view of the removal of the higher sensitive layer. In an example a gelatino-silver chloride emulsion containing colloidal silver and formalin is coated on to a transparent or opaque support, overcoated with a silver bromide emulsion which is highly diluted with aqueous polyvinyl alcohol, exposed to affect the silver bromide only, treated in a metal-quinol developer containing a high proportion of sodium sulphite, acid stopped, fixed, washed, and treated in warm water so that only the layer containing the positive image remains.
Patent GB-730103-A (GB)
Title: Plastic mullions
IPC: E06B3/68
Filed: 1952-10-23
Abstract: 730,103. Windows. SQUIRES, J. G. Oct. 23, 1952 [Oct. 23, 1951; May 17, 1952], No. 26663/52. Class 20 (3).  A window for minimising breakage, fragmentation, and flying glass in the event of explosive blasts &c. comprises a sash frame 1 having a large glass panel 2 affixed therein and a number of strong flexible plastic strips 5 adhesively secured to the panel 2 'and secured at their ends to the frame 1 by an adhesive, or by staples 9. The strips 5, opaque, translucent or transparent, may be formed from conventional flexible plastics and if they are to simulate wood, lead, stainless steel, &c., appropriate pigments are incorporated to give the desired external appearance. A reinforcement, preferably of glass is incorporated in the mullion, the glass being embedded in the form of strands, or string 10, or as a woven fabric of fibrous glass. The strips 5 can be made by extruding the plastic with the fibrous glass, or by laminating the glass fibres with the sheets of plastic, the laminae being cut to shape. The strips 5 are preferably arranged on the inside of the window.
Patent GB-1023476-A (GB)
Title: Circuit arrangement for interim connections in telephone private automatic branch exchanges
IPC: H04M3/58
Filed: 1963-07-05
Abstract: 1,023,476. Automatic exchange systems. STANDARD TELEPHONES & CABLES Ltd. July 5, 1963 [July 11, 1962], No. 26829/63. Heading H4K. In a cross-bar PABX provided with facilities for interim calls, initiation of such a call by an extension engaged in an outgoing call causes the extension to be connected, through an interim call circuit connected to the subscriber's side of the outgoing-call feedbridge in use, to a free feedbridge and register in which the identity of the interim party is recorded, whereafter the interim call is completed through the original feedbridge. In response to an extension N1 operating his " call back " key whereby both line wires are earthed, differential relay X comes up followed by UA thereby connecting N1 to a call-back circuit R-TS. When the key is released, UB is energized in series with UA(II) and R operates in series with A. Consequently starting potential is applied via r5 to initiate operation of a local link hunter AS. Relay C responds to the first free local link (feedbridge) JUe having an associated idle register, J-Reg to stop the hunter and operate relay T(II). The number of the interim party is dialled into the register which then selects the wanted line N2 and operates switching relay AA in the usual manner. Relay UC follows via bank d of the hunter AS, in order to release UA and maintain closed the main exchange loop Amt. The extension N1 is now connected via the original feedbridge AUe and the link JUe to the interim extension N2. In the event that N1 wishes to make an interim call to a main exchange subscriber, the register J-Reg brings up KZ followed by CC to release the local link and relay C and to operate UE(III). When the link is finally released, T and UE (windings I) hold and via their contacts t3, Ue4 they initiate operation of a trunk selector AW2. When the number of the wanted party is recorded in the trunk register A-Reg, relay D comes up to switch through extension N1 to the main exchange and to operate UC as before. The interim call may be released at any time by re-operating the call-back key whereby UD(I) and T(I) come up and R releases (some of these relays may already be in these states depending upon the progress of the interim call). When the key is restored, T falls first and UE comes up momentarily to release UA or UC, UB falling back when UE drops back. If an idle feedbridge and register are not available for use with the interim call, the subscriber is apprised of the situation by the lack of dial tone and then releases the interim call as described above.
Patent GB-688467-A (GB)
Title: Improvements relating to apparatus for hauling wagons
IPC: B61J3/08
Filed: 1949-10-19
Abstract: 688,467. Hauling railway wagons; winch drives. NORTONS (TIVIDALE), Ltd., HOWARD, A. M., and HARPER, W. G. Oct. 11, 1950. [Oct. 19, 1949.] No. 26895/49. Classes 78 (iv), 78 (v) and 104 (ii). In a wagon haulage system wherein a bogie may be pulled in both directions by the difference in tension of two ropes one extending forwardly and the other rearwardly thereof and the bogie carries a mechanism for engaging a wagon axle the mechanism is operated by varying the tension in one of the ropes. A bogie 1 is drawn in one direction by a hauling rope 22 and in the other by a trailing rope 26 both ropes being attached to a haulage drum 57. The drum 57 is rotated by a small motor no through epicyclic gearing 62 to draw the bogie 11 beneath a wagon, the shaft of the main forward drive motor 58 being held fixed by a brake 70. Once the bogie is in position beneath the wagon a thruster 68 is operated to move a pulley 66 to increase the tension in the rope 26 and thus raise rollers 42 on a U-shaped member 28 into engagement with the wagon axle 30. Continued pull exerted on the rope 26 by rotation of the drum 57 presses the roller 42 against the axle 30 to tilt the member 28 against a spring 45 thus bringing a roller 44 on the member 28 into a position to engage the other side of the axle 30; the member 28 is thereafter held in this position by a pivoted catch 50. The additional effort which would be required to move both the bogie 1 and the wagon will cause a fluid transmission drive 72 to slip and when this occurs the operator stops the motor 60 and applies a brake 74 : the brake 70 is then released and the larger main forward drive motor 58 is started so as to the drum 57. After the wagon has reached the required position the thrustor 68 is released so that the arms 34, 35 carrying the member 28 drop to disengage the axle 30 and the bogie 1 is then returned to a position to engage a further wagon by the motor 60 driving the drum 57. Overrunning of the bogie 1 at either end of its travel is prevented by a limit switch 76 driven by the drum 57. The bogie carries two members 28, one on either side, to engage the axle 30 near the wagon wheels. Specification 688,468 is referred to.
Patent GB-1513748-A (GB)
Title: Photographic developer apparatus
IPC: G03D7/00
Filed: 1975-06-25
Abstract: 1513748 Diazo developing apparatus ADDRESSOGRAPH-MULTIGRAPH CORP 25 June 1975 [3 July 1974] 26990/75 Headings G2A and G2X Apparatus for developing a diazo photographic medium in the presence of heat and in an ammonia laden atmosphere comprises an enclosed chamber, a heated plate against which the medium is brought into contact, and first and second pairs of rollers at opposite ends of the plate. As shown, the apparatus forms the developer section 14 of a micro-fiche duplicating machine, shown generally in Fig. 1, which also includes an exposure section 12. The exposure unit comprises a curved transparent platen 38, on which the original and then the copy sheet are laid in contact, and held in position by a flexible band 48. The band is secured at one end to the housing, and at the other end to a spring fixed to the cover 16, passing round a roller 54 also fixed to the cover. Fig. 3 shows how the cover pivots on a bolt 46 into the open position shown in broken line. The light source is a mercury vapour lamp 34, mounted in front of a reflector 36. A pair of shutter members 42, 44 are connected by a mechanical linkage to the cover 16 so that when the cover is open the shutter members are closed (position shown in broken line). After the original and copy sheets have been placed on the platen, the cover is closed, which causes the shutter members to swing open (position shown in full line), and automatically initiates a timed exposure. On closing the cover, it is latched shut by a coupling mechanism 96 controlled by a solenoid 92, which releases the latch after the exposure time has elapsed. The copy sheet is then removed and inserted through the slot 26 into the developing unit. The developing unit comprises a chamber 114 into which ammonia gas is admitted from a supply bottle containing a concentrated solution of ammonium hydroxide. The copy sheet to be developed enters between a pair of feed rollers 118, 120, passes over the surface of a heated plate 112, against which it is firmly held by a pressure roller 144, and is passed out of the chamber by another pair of rollers 130, 132, to be received in a tray 28. Leakage of ammonia is minimized by contact of the roller pairs with each other and with sealing means 122, 124, 130, 132. The plate is heated by a thermostatically controlled heating element. A pair of side walls, as at 116, extend upwards from the plate 112, and the ammonia gas enters the chamber through a series of apertures 117 in these side walls.
Patent GB-997651-A (GB)
Title: New water-insoluble anthraquinone dyestuffs and process for their manufacture
IPC: C08K5/18
Filed: 1963-07-09
Abstract: The invention comprises 1-amino-2-phenyloxy - 4 - hydroxy - anthraquinones free from acidic groups imparting solubility in water whose phenyl residue is substituted by a group -(CH2)n-1CN, wherein n is 1 to 4, and which phenyl group may be further substituted.  The dyes are made by heating a 1-amino-2-halogeno-4 - hydroxy - anthraquinone is heated with a hydroxybenzene which contains a group -(CH2)n-1CN and may be further substituted. the dyes dye and print fibres of aromatic polyesters, cellulose esters and polyamides in red shades from aqueous dispersion.
Patent GB-1217748-A (GB)
Title: A regenerative braking system for a d.c. motor
Inventor: HERMANSSON FREDERIK
IPC: H02P3/14
Filed: 1968-06-07
Abstract: 1,217,748. Control of D.G. motors. ALLMANNA SVENSKA ELEKTRISKA A.B. 7 June, 1968 [9 June, 1967], No. 27221/68. Heading H2J. A series motor 1, 2, e.g. in a tram, is connected to the circuit shown for dynamic braking. Thyristor 4 is intermittently fired at an adjustable rate and during its off periods braking is regenerative to the supply network 5, but if this is unreceptive (due to lack of load or contact failure at pick-up 6) the voltage across a buffer capacitor 9 rises to a point at which a resistor 10 is switched in. The excessive voltage is detected by a discriminator 12 which triggers thyristor 11 and also a delay circuit 15, which after a set time triggers a commutating thyristor 17 to extinguish 11. A diode 7 prevents short circuiting of the supply through thyristor 4; 3 is a smoothing reactor. The motor is energized via a thyristor which controls the speed, but only the braking arrangements are shown.
Patent GB-1496850-A (GB)
Title: Piston and rod connection
IPC: F15B15/14
Filed: 1976-06-30
Abstract: 1496850 Pistons; locking threaded members CLARK EQUIPMENT CO 30 June 1976 [30 June 1975] 27257/76 Headings F2T and F2H A piston 12 is attached to a piston-rod 14 by the mating of threaded portions 22, 24 and locked by means of a locking member 30 occupying a pair of aligned slots 26, 28 in the threaded portions 22, 24, the locking member 30 being retained by a retainer member 32. The embodiment shows the locking member 30 in the form of a hardened steel dowel pin retained by a plate 32 attached to the piston 12 by a bolt 34. The tapped hole 38 occupied by the bolt is connected by a conduit 36 to the slots 26, 28, and may be used to press out the dowel pin 30 by the application of hydraulic pressure, e.g. from a grease gun. There may be two slots 26, 27, or a greater number in the piston-rod thread 22, to allow angular, and thus axial, adjustment between the piston 12, and the rod 14.
Patent GB-937397-A (GB)
Title: Improvements in or relating to magnetic work holding devices
IPC: B23Q3/154
Filed: 1962-07-18
Abstract: 937,397. Magnetic holding devices. ROBERT BOSCH G.m.b.H. July 18, 1962 [July 19, 1961], No. 27541/62. Class 35. A de-energizable magnetic work holding device for holding workpiece 5 (Fig. 1) comprises a soft iron housing 1 having two parallel bores 6, 7 with two permanent magnets 9, 10 magnetised perpendicular to their longitudinal axis mounted for counter rotation therein each magnet having a pinion 16 at one end, engageable with an associated rack, each rack forming part of a switching pin 20 slidably mounted in the housing 1, to cause rotation of the magnets. The magnets may be of the sintered oxide type and have pinions of non-magnetic material. Also the housing may be constructed so that the dividing wall between bores is less than 3 mm. in thickness. In the holding condition the magnetic field of each magnet follows the dotted path shown in Fig. 1 while when the magnets are rotated 90 degrees the magnetic field is shortcircuited horizontally through the housing.
Patent GB-925191-A (GB)
Title: Improvements relating to switching means for high-voltage electrical equipment
Inventor: CHRISTIE JOHN
IPC: H02B13/02
Filed: 1958-08-27
Abstract: 925,191. Switch gear structures ; highvoltage switches. A. REYROLLE & CO. Ltd. Aug. 24, 1959 [Aug. 27, 1958], No. 27548/58. Class 38 (5).  Switching means for high-voltage equipment comprises an insulating bushing 1 8 formed with a curve or angle in its length, in which bushing is embedded a conductor, one end of which comprises or carries a terminal and the other end of which constitutes or carries a contact. The bushing is supported by a bearing 24 permitting rotation of the bushing about an axis which passes through the terminal and the contact 27 at the other end of the bushing is radially spaced from the axis and movable into and out of engagement with a fixed contact 28A when the bushing is rotated. In the switch-gear shown in Fig. 4, one such switching means acts as a bus-selector, the bushing 18 being rotated by worm gearing to bring the contact 27 into engagement with either of bus-bar contacts 28A or 28B or with an earthing contact 53. The bus-bar chambers 13A, 13B may be filled with gas of high dielectric strength in which case the earthing contact is housed in an intermediate chamber 50 provided with gas-tight sliding doors 52. Another switching means acts as an isolator, the bushing 18<SP>1</SP> being rotated, by worm gearing to bring a contact 37<SP>1</SP> into or out of engagement with a cable termination contact 31. The vertical limbs of the bushings 18, 18<SP>1</SP> extend into a circuit-breaker tank and carry turbulators 17. Current transformers and a voltage transformer 40 are provided. In an outdoor switch-gear installation, a circuitbreaker has a rotatable bushing carrying a contact which co-operates with a fixed contact on an insulating post mounted on a bracket secured to the circuit-breaker tank, Fig. 5 (not shown). In Fig. 6, the bushing 80 is rotably mounted in the wall of a chamber 85 containing air or other insulating gas or oil. The movable contact 84 co-operates with a contact 87 on a bushing 86 or with an earthing contact 88. The contact 84 or the contact 87 may be provided with an insulating shroud, e.g. of glass fibre. Specification 886,290 is referred to.