baber/WOPTO huggingface dataset:
Patent GB-709751-A (GB)
Title: Improvements relating to photographic film processing apparatus
IPC: G03D3/10
Filed: 1951-09-18
Abstract: 709,751. Photographic film processing apparatus. MACKAY, E. C. (Sharpe, K). Sept. 18, 1952 [Sept. 18, 1951], No. 21841/51. Class 98(2) The apparatus comprises a plurality of tanks, a track supported thereon, carriages manually movable on the track, a film rack vertically slidable on a vertical support mounted on each carriage, and manually operable means for raising and lowering the film racks on the supports to lower films hung from the racks into and raise them out of the tanks. As shown, Fig. 8, tanks 10, 11, 12, 13 for processing liquids support rails 14, which may extend beyond the tanks to a loading station 15, carriages 18 each comprising an open frame with wheels 19 have vertical supports or posts 25 thereon carrying slidable film racks 30, which latter may be provided with a rope (not shown) for convenience in sliding. Film hangers, described also in Specification 709,778 and arranged to accommodate a number of films, may be suspended from the film racks 30. In use a carriage 18 loaded with films is moved successively over each tank and the rack with its hangers and films is lowered into liquids in the tanks for processing. A stop catch arrangement may be provided to align the carriage over each tank. After the last tank 13 the carriage may be run on to a truck 16 to convey the films to a dryer (not shown). The rope for lowering and raising the films may pass over a cam shaped pulley whereby the films and the liquid in the tanks may be agitated.
Patent GB-1341131-A (GB)
Title: Methods of operating nuclear reactors
IPC: G21C7/00
Filed: 1971-04-19
Abstract: 1341131 Controlling reactors SIEMENS AG 19 April 1971 [19 Feb 1970] 21867/71 Heading G6C In the power regulation of a pressurized water nuclear reactor, in particular in the control of load cycles, using a power control-rod bank, the compensation of the Doppler effect, occurring with load variations and caused by variation of the fuel temperature, is carried out by means of a Doppler control-rod bank, while the power control-rod bank has a constant entry depth. The rods of the power bank are generally inserted only into the upper region of the core, even if the desired power output is quite low. The number of rods in the Doppler bank, which may consist of a partial group of the power bank, is selected such that it fully enters the reactor core at the minimum load in order to compensate for the effects of the fuel temperature variation and in order that it should absorb uniformly over the entire core height. At larger partial loads, a smaller number of rods will be selected for the Doppler bank, which would fully enter the core for the larger partial loads also. Owing to the initially rising coolant temperature when the load is reduced, the control rods of the Doppler bank at first receive entry command to provide adequate rod effectiveness, accompanying entry ofthe control rods of the power bank being necessary since the Doppler bank works slowly. After adequate regulation of coolant temperature, the power bank receives upwards command to its former working position, while the Doppler bank alone takes over the compensation. On the load being restored, the Doppler bank returns to its full load position corresponding to the working position of the power bank. It is advantageous for the rods of the Doppler bank to be exchangeable at relatively long time intervals with the rods of the power bank to avoid long-term different burnup effects.
Patent GB-1470239-A (GB)
Title: Electronic adjusting and regulating device
IPC: G05F1/455
Filed: 1974-05-17
Abstract: 1470239 Automatic control of voltage and speed ROBERT BOSCH GmbH 17 May 1974 [18 May 1973] 21955/74 Headings G3R and G3X The voltage delivered to an A.C. load is regulated by adjusting the firing angle of a triac in dependence on the value of a supply voltage. Charging current is diverted from a firing capacitor by means of two proportional amplifiers controlled by the supply voltage, one amplifier being provided for each polarity of the supply voltage. As shown, a series-wound motor 50 is supplied over a triac 9 from an A.C. source U 1 . A firing capacitor 8 is charged at a rate determined by a variable resistor 7 by a squarewave voltage produced by a resistor 6 and Zener diodes 20, 21, until a trigger device 10 breaks down and the triac 9 conducts. A proportion of the charging current is diverted from the capacitor 8 through transistors 12, 15, biased on during alternate half-cycles. The amount of current diverted is determined partly by a voltage taken from a potentiometer 19 responsive to the supply voltage U 1 , and partly by a voltage received from resistors 51, 52 and indicative of the back e.m.f. of the motor 50, so that both the voltage supplied to the motor and its speed are regulated. In another embodiment, Fig. 1 (not shown), a two-terminal network similar to that shown in Fig. 5 is used to regulate the load voltage.
Patent GB-779749-A (GB)
Title: Improvements in or relating to water heating and hot water supplying apparatus
IPC: F16K31/68
Filed: 1955-07-29
Abstract: 779,749. Hot-water supply systems. KENDON, O. M. July 29, 1955, No. 21987/55. Class 64(1) [Also in Group XXIX] In a hot water supplying apparatus of the type wherein a container 1, Fig. 1, receives and holds water under a pressure greater than atmospheric pressure, means are provided whereby air collecting at the top of the container is bled to the atmosphere either automatically or automatically during delivery of a quantity of water from controllable outlet means 25. The air is bled to atmosphere through an orifice 26 in the inlet pipe 19 and a vent pipe 18 which is high enough to maintain hydrostatically the pressure required in the container or, through an orifice 27 in the outlet pipe 23. Alternatively, either orifice may be replaced by a disc or ball valve normally held open by gravity. Water is supplied at a pressure determined by a reducing valve 2 or the height of a header tank 3 by way of a valve 4 to the container 1 where it is heated by an electric element 20 controlled by a thermostatically operated switch 21. The pressure in the container 1 acts on a bellows 5. Fig. 2, in the valve 4 to hold a spring-loaded rod 6 from contact with a ball 13. If the pressure falls below a preselected value, however, the rod 6 holds the ball 13 on its seat 13a to prevent the flow of water into the container until the pressure has risen again. A screw 16 enables this value to be adjusted. Fig. 4 shows an alternative construction for the valve 4 wherein a valve member 34 is controlled by a bellows 35. If the pressure in the container 1, and hence in the outlet 44 from the valve, falls, the pressure of water entering the valve at 45 causes the bellows to close the member 34 on its seat 36. A screw down valve 32 is provided. In a further valve construction a ball is held away from its seat against the resistance of a spring by a rod mounted on a bellows connected to a capsule mounted in the container 1 and filled with a fluid which expands when heated. Specification 706,866 is referred to.
Patent GB-441210-A (GB)
Title: Improvements in and relating to bicycles or other vehicles
IPC: B62M1/00
Filed: 1934-07-27
Abstract: 441,210. Treadle-driven bicycles &c. GROSS, A., 1, Compayne Gardens, Kilburn, London. July 27, 1934, No. 22028. [Classes 136 (i), 136 (ii), and 136 (iii)] Driving-mechanism for bicycles and other vehicles comprises a lever adapted for reciprocatory pivotal movements, such movements in one sense transmitting impulses to a driven member, the lever being automatically variable in its effective length in accordance with the fore-and-aft inclination of the vehicle to the horizontal ; the invention also comprises subsidiary improvements in the steering mechanism, and in the frame and saddle constructions. A pedal e on each side of the bicycle frame is secured to a member g, which slides on vertical guide members a, i, rollers being interposed, and the upward return movement being effected by a coiled tension spring. To each slide g is pivoted a telescopic lever k, L, which varies in length during the stroke and is secured to a free-wheel device n (or to a pawl or other one-way driving member), which drives the rear-wheel axle through gearing o, p and a chain s or other transmission. The bicycle frame comprises metal side plates u which enclose the gearing. Cross-members c interconnecting the guides a (which have forwardly projecting arms b at the bottom) pass through curved slots v in the plates u, thus allowing fore-and-aft movement of the guides, whereby the effective length of the levers k, l and thus the gear ratio may be varied. The cross-members c are fitted with rollers and toothed gears engaging racks and coupled together by a chain a<1>, in such a way that the cross-members move in unison, and the guides a maintain a substantially vertical position for all inclinations of the bicycle (e.g. on hills), whereby the transmission ratio varies automatically according to the inclination. Steering is effected by means of rotary hand-grips ml connected by flexible transmissions within the handle-bar c<1> to bevel &c. gearing connected to the fork stem, the handle-bar c<1> being rigid with the head b<1>. The saddle support comprises a forked member p which is secured to quarter-elliptic springs r<1> and is passed through and adjustably clamped in slots s<1> in the side plates u, so that the inclination can be adjusted. A stem w<1> is telescopically adjustable in the upper part v of the member p and carries leaf springs x<1> supporting the seat o<1>, which consists of a number of contiguous transverse strip springs turned up at the ends and padded on top.
Patent GB-296369-A (GB)
Title: Improvements in or relating to the manufacture of tiles
IPC: B28B11/00
Filed: 1928-07-31
Abstract: 296,369. National Fire Proofing Co., (Assignees of Shipley, R. A.). Aug. 30, 1927, [Convention date]. Extrusion machines; cutting-machines; processes.-Closed hollow bricks are formed by producing a tubular body and a strip of material, severing sections from the tubular body, bring- ing the open end of the section into proximity to the, strip and applying a portion of the strip thereto to close the end. As shown, a tubular body 5 and side strips 11 are extruded simultaneously from a die 6 and the body is severed by a wire 19 into sections 2 which are advanced at a faster rate by a conveyer 17 to a turn-table 21 where the section is turned through a rightangle and is closed by portions of the strips 11 severed and applied by plates 25 actuated by cams 23. To facilitate adhesion, the strips 11 are roughened at 15, Fig. 1, and sprays 20<a> are provided to moisten the material. The strips 11 are diverged to clear the table 21. From the table 21 the closed brick is pushed by the following section on to a faster moving' belt 22, the section being arrested by a stop 34 on the table. The table 21 is carried by a shaft 24 which is rotated intermittingly through a clutch 85. Four stops 34 are carried by the table and are controlled by a stationary cam 39, so that, in the rest position of the table, three of the stops are depressed by cam portions 41; the fourth stop is energized by a flexible cam portion 42 which is normally depressed by springs but is raised by an electromagnet 52 energized by the closing of a switch 65, Fig. 3, by a completed brick on the. conveyer 22 so as to elevate the stop to arrest the section 2. The section 2 moves the stop laterally, against the action of a spring 36, and closes a switch 40 which energizes an electromagnet 57 to close the clutch 85 through a lever 78, the circuit being opened after a quarter revolution of the shaft through an insulated slipring 70. The clutch 85 engages a member 86 driven from a shaft 64 through bevel gears 62. The cams 23 are operated from the gear 62 through clutches controlled by cams 91 on the shaft 24.
Patent GB-1087216-A (GB)
Title: Soil conductivity gradient detector (and deep-searching metal detector)
IPC: G01V3/15
Filed: 1966-08-09
Abstract: 1,087,216. Locating conductors. M. I. HOWELL and A. J. MORRISON. Aug. 9, 1966, No.22207/66. Heading G1N. Portable apparatus for locating a conductive body comprises a spar having at the lower end a transmitter coil with its axis along the spar and energized from a low-frequency transistor oscillator. At the other end of the spar is a receiver coil with its axis at right angles to the spar and connected to an amplifier with an indicating meter.
Patent GB-598272-A (GB)
Title: Improvements in or relating to vaporizing device
IPC: F24F6/04
Filed: 1945-08-29
Abstract: 598,272. Vaporizing - - apparatus. STEVENS, A. H. (Odac Manufacturing Co.). Aug. 29, 1945, No. 22220. [Class 81 (i)] A vaporizing device comprises a liquid container 10 having an open top, an adjustable closure 26 providing vents of variable area, a porous pad 16, means (such as a plate 15 provided. with a recessed portion 21 having a central aperture 22 and equipped with lugs 20 to prevent rotation thereof) for supporting the pad below the vents, and a capillary member, e.g. wicks 14, depending from the pad into the container. As shown, variation of the area of the vents is obtained by varying the engagement between lugs 28 on the closure and lugs 25 on plate 15. In another embodiment, the closure is provided with vertically extending apertures and tetescopically engages the container. The porous pad, which may comprise a rigid porous body provided with an integrally depending capillary portion, may be supported within the container by a vessel which when transparent, may be raised by engaging it through a hole provided in the bottom of the container to ascertain the level of the supply without removing the vessel from the container.
Patent GB-532890-A (GB)
Title: Improvements in or relating to metal bonded abrasive articles
IPC: B24D18/00
Filed: 1939-07-31
Abstract: 532,890. Abrasive articles. TENNANT, W. J. (Carborundum Co.). July 31, 1939, No. 22222. [Class 70] Abrasive articles are made by bonding an abrasive material such as diamonds with iron and another metal of comparatively low metling point, e.g. tin or zinc. The'abrasive is mixed with powdered iron and tin or zinc, the mixture is heated to above the melting point of the tin or zinc until the latter reacts at least partially with the iron to form an intermetallic compound. Wheels. grinding discs and the like may be moulded from the material and heated in an electric furnace.
Patent GB-495665-A (GB)
Title: Improvements in or relating to photographic cameras
IPC: G03B27/32
Filed: 1937-08-13
Abstract: 495,665. Photographic copying cameras. HUEBNER, W. C. Aug. 13, 1937, No. 22270. Convention date, Aug. 31, 1936. [Class 98 (i)] Copy-holding, lens-holding, and sensitivematerial holding devices are supported from an overhead frame of approximately T-form which is spring suspended from uprights arranged at opposite ends of the apparatus. As shown in Fig. 2, the tubular member 22 is attached to a plate 24 and a transverse beam 28 slung respectively on springs 25, 35 from the uprights 20 and 31. Tracks 37 are suspended from the tube 22 and carry copyholder lens board &c. The copyholder is pivoted at 55 to the carriage 43 and is adjusted to the vertical by links 67 and screws 68. The carriage may be moved horizontally either by the handle 48 working pinions engaging the racks 49 on the underside of the tracks 37, or by the handle 54 working a sprocket carrying an endless chain attached at one point to the carriage. The horizontal bars 59, with clips to hold the copy, can be moved vertically by rack and pinion mechanism. For flexible originals the board 69 may be hinged at its lower edge, provided with a coverglass frame 70 and held vertical by a latch 72. A carriage 73 supports the framework 74 and lamps 76. The carriage 78 supports not only the lens board 82 carrying also an additional copyholder 88, but also a transverse beam 95 which carries two further copyholders with adjustments similar to those of 69. Either of the three additional holders may be brought into use by the prism 87 attached to the lens 86. For holding the sensitive material at the dark-room (lefthand) end of the apparatus two horizontal bars 116, Fig. 5, are provided, having adjustments like the copy-holding bars 59. Two bars 138 are also provided to hold screens for photo-mechanical work. These bars and the racks 139 run on rails 121 extending to the sides of the camera so that screens may be run in or out of position. The rails are supported on threaded rods 122 which may be rotated simultaneously for adjusting the screen relative to sensitive surface, through an endless chain 124 which engages the sprockets 123 simultaneously. The Specification also describes a form of carriage 43 propelled by an electric motor, and a rearward extension of the tracks 37 with a sensitive material support used when large negatives are required.
Patent GB-1191786-A (GB)
Title: Control Circuit Arrangement for Controlled Rectifiers
IPC: G05F1/66
Filed: 1968-05-10
Abstract: 1,191,786. Converter control systems. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 10 May, 1968 [13 May, 1967], No. 22278/68. Heading H2F. In a converter system a thyristor (or thyristors) 1 (Fig. 1) is fired to pass current half sine waves from a diode bridge, the firing instants, i.e. the delay angle being dependent upon the magnitude of a variable input voltage v, and the firing signal being initiated by a comparator 10 (e.g. a differential amplifier) when a slowly varying lagging edge of a cosinusoidal shaped sawtooth voltage signal Z from a sawtooth generator 5 crosses a level corresponding to the said input voltage v (Fig. 3). The cosinusoidal edge is provided to ensure linearity between the mean output voltage V from the thyristor and the input voltage v and in addition the sawteeth signals occur simultaneously with corresponding half sine waves of the rectified supply voltage U and their amplitude is made directly proportional to the amplitude of the said half waves. Also the sinusoidal edge ends at a value corresponding to zero value of the input voltage. In an embodiment (Fig. 4) of a circuit arrangement to provide the firing control signal (Fig. 2c, not shown), the sawtooth signal Z is generated by rapidly changing a capacitor C13 through a transistor 18 at the beginning of each half sine wave to a voltage proportional to the amplitude of said half sine wave. The latter transistor is short-circuited for the duration of each half sine wave by a transistor 19 except for a very short period during which it is rendered conductive by the conduction of a transistor 17 when 19 is cut-off a short period before the zero passage. The capacitor 13 is then discharged for the remainder of each sinusoidal half wave through a transistor 14, the base voltage of which is sinusoidal, whereby the discharge current is made proportional to the instantaneous value of the voltage of the respective half sine wave. A differential circuit 10 compares the sawtooth Z from C13 with input voltage v at terminals 8, 9 and the instant Z exceeds v, the circuit 10 causes transistor 16 and power transistor 17 to conduct the latter supplying firing signals to the thyristor 1 (or thyristor group).
Patent GB-427450-A (GB)
Title: Improvements in or relating to cigarettes
IPC: A24D3/02
Filed: 1934-08-01
Abstract: A filter wad for cigarettes comprises a rolled strip of paper which is formed in alternate flat and corrugated lengths.  The lengths increase in size from one end of the strip so that alternate plain and corrugated cylinders are formed when the strip is rolled.
Patent GB-320447-A (GB)
Title: Improvements relating to the hingeing of the lids or covers of metal boxes
IPC: B65D43/16
Filed: 1928-08-03
Abstract: 320,447. Crabtree, J. A. Aug. 3, 1928. Pinless hinges.-The lids of metal boxes, particularly for containing electrical switchgear, are hinged by means of a bent metal piece b which engages a slot a<3> in the lid or cover a and a slot or slots c<1> in the body of the box c, the ends b<1> of the piece b being bent over as shown and secured by clinching or riveting. The slot a<3> is formed in a tongue a<2> or a stepped extension of the lid.
Patent GB-1512784-A (GB)
Title: Bass boost audio amplifier
IPC: H03F3/68
Filed: 1974-05-21
Abstract: 1512784 Transistor amplifiers LUCAS ELECTRICAL Ltd 8 May 1975 [21 May 1974] 22532/74 Heading H3T A bass-boost amplifier comprises: a transistor 20 having an emitter load 21 and a collector load 22; a passive lowpass RC input filter 14, 17 connected to the base of the transistor; a power amplifier connected to the collector of the transistor; and a feedback circuit comprising a parallel connected resistor 37 and capacitor 38 connected between the power amplifier output and the emitter of the transistor 20 to give an overall lowpass response. The amplifier is provided with two inputs 12, 13 for receiving the two outputs from a stereo system and includes a volume control 18. The output is coupled to a speaker 36 for reproducing the low frequency components of the two stereo signals.
Patent GB-624599-A (GB)
Title: Improvements in thermal overload release devices for automatic circuit breakers
IPC: H01H83/22
Filed: 1947-08-14
Abstract: 624,599. Automatic circuit - breakers. CRABTREE & CO., Ltd., J. A., BESAG, E., HILL, W. E., and WINTLE, T. D. G. Aug. 14, 1947, Nos. 22585/47 and 4732/48. [Class 38(v)] A thermal overload release device for a polyphase automatic circuit breaker comprises circular bimetal elements t riveted at one end to legs v<SP>1</SP> of levers v, each lever being pivoted about a vertical axis, by a pin w, to a metal former p around which and insulated therefrom is a heater coil s. The disposition of the bimetals t about a vertical axis improves the space factor, and the metal formers provide a heat reservoir for giving a long time lag. Ends t' of the bimetals t are located between parts u of the box a and abutments c<SP>1</SP> on a trip bar c, and legs o<SP>2</SP> of the levers v engage a trip bar d, constructed as in Specification 624,581. Mica shields 1, 2 on the ends of the formers p direct the heat on to the bimetals t and the rear compartment b accommodating the trip bars c, d affords a still-air space for minimizing heat dissipation, for which purpose also, the cover 3 of the box a has recesses containing asbestos plates 4. The coils s are mounted on a raised floor 12 of the box a so as to be heat insulated from their terminals x, x<SP>1</SP> which are brought out beneath, and are respectively connected to the line terminals 'o and the fixed switch contacts 8. Strips 7 connect the contacts 8 to further line terminals o<SP>1</SP> to permit feeding other switches from the same overload unit. The terminals o are separated from the contacts 8 by an arc shield 11 and a cooling effect between the heater coil chambers k and these terminals is produced by funnel shaped air spaces 5a in front of the chambers.
Patent GB-1273812-A (GB)
Title: Spring lock washer
Inventor: TSURUMOTO ICHIZO
IPC: F16B39/24
Filed: 1969-05-02
Abstract: 1,273,812. Making washers. I. TSURUMOTO. 2 May, 1969 [29 May, 1968], No. 22647/69. Heading B3A. [Also in Division F2] A coned disc spring lock washer having a slit extending from its inner to its outer periphery is made by winding a wire of trapezoidal crosssection around a spindle, cutting the wire at each pitch, and setting the ends of each washer opposite each other.