baber/WOPTO huggingface dataset:
Patent GB-1003636-A (GB)
Title: Transistor switching circuits
IPC: H03K3/30
Filed: 1964-03-25
Abstract: 1,003,636. Transistor switching circuits. INTERNATIONAL BUSINESS MACHINES CORPORATION. March 25, 1964 [April 1, 1963], No. 12597/64. Heading H3T. In a switching circuit comprising a transistor the collector current is stabilized by negative feed-back via a transformer. As shown, transistor 11 is normally non-conductive until transistor 20 is turned on when a voltage pulse is induced in windings 15B, 15C, turning on transistor 11 and diode 19. Negative feed-back between windings 15C and 15B reduces the base current to a value considerably below the saturation level and hence stabilizes the collector current. Charge storage effects are minimized by the use of an initially high base current and by the inductive energy stored in winding 15B when turning off. In Fig. 2 (not shown) the turn off time is made more rapid by connecting a diode between tappings on resistor 23 and source 40. Logic circuits.-In Fig. 4 (not shown) the emitter/collector paths of three circuits comprising transistors 11 are connected in series and a further circuit of the type shown in Fig. 1 connected in parallel with the common series of paths so as to provide a logic function A+ (B.C.D).
Patent GB-1036213-A (GB)
Title: Improvements in spacecraft boom erection apparatus
Inventor: BLONSTEIN JACOB LEWIS
IPC: F42B15/00
Filed: 1963-03-29
Abstract: 1,036,213. Self-propelled missiles. BRITISH AIRCRAFT CORPORATION (OPERATING) Ltd. March 24, 1964 [March 29, 1963], No. 12600/63. Heading F3A. Booms are pivotally connected to a space craft, the connecting means for each pair of adjacent booms being interconnected such that the erection of any one boom causes the simultaneous erection of the remaining booms. The figure shows the mounting of two adjacent booms 2 which are pivoted at 10, 11 to the movable portion 12 of a hinge mounting, the fixed portion 13 being rigidly attached to the satellite body 1. Each boom includes a rotating joint 14 and can swivel about a mounting pin 11. The booms 2 are initially strapped down and on release of the satellite the strap is explosively released, spinning motion of the satellite (imparted by four small rockets around the tail of a launching rocket) causing the booms to open. A cable connecting two adjacent booms damps the erecting motion and spring-loaded pins lock them in the erected position. An aerial 15 is fastened to the hinge portion 12 and connected to the satellite by a cable 17. If the satellite is not spun a coiled spring can be made to unwind and erect the booms, while bevel gears can be used instead of the hinges 10, 11, or the booms can be mounted on to the movable parts 12 of the hinges with a Universal joint as an alternative to the rotating joint 14.
Patent GB-1532142-A (GB)
Title: Programme loaders associated with programmable controller
IPC: G05B19/05
Filed: 1977-03-25
Abstract: 1532142 Programmable controller ALLEN-BRADLEY CO 25 March 1977 [26 March 1976] 12650/77 Heading G3N  A unit loads and edits the control program for a programmable controller 3. Using a so-called contact histogram mode, the logic state of a selected 1/0 unit connected to the controller is monitored and, each time its status changes, its present status is recorded along with the time interval between such changes. In one embodiment the loader unit is hardwired and the status changes recorded by a printer 47, and in another it uses a microprocessor where the status changes are recorded on a CRT screen.
Patent GB-305882-A (GB)
Title: Improvements in or relating to typographic moulds
IPC: B41B5/12
Filed: 1928-04-30
Abstract: 305,882. Pierpont, F. H., and Lanston Monotype Corporation, Ltd. April 30, 1928. Single-type composing and casting machines; moulds.-Relates to moulds for casting elements, such as leads and rules, in which the outlet of the mould is closed by the previously cast element. The mould comprises two end-blocks B, B', Figs. 5 and 6, secured, one permanently and one adjustably, to a base A. Between the endblocks are located two mould side-plates C, C<1>, separated by distance-pieces D, D<1>, Fig. 2, beneath which slides a mould-blade F. The endblocks and the parts between are clamped together by bolts E. The plates C, C<1> are held down on the base A by clamps C<4>, which bear on intermediate plates C<5>, C<6>. A block G, containing a jet-opening G', slides in the base A, and a sliding pin G<2>, operated by a cam-piece H, ejects the jet-piece after the casting. A matrix J is seated on the side-plates C, C', and is held in place against a locating-plate K, Fig. 5, by a clamp L. If the matrix-cavity has a closed end, so that the matrix must be lifted after the casting, a matrix-holder N, Fig. 6, moving in guides 0, O<1>, is used. To prevent the cast from being lifted with the matrix, a retractable pin P, Fig. 5, is arranged to project slightly into the mould. A clamping-scraw, operated from a moving part of the machine, bears against f.he side-plate C, in order to clamp the previously cast element during injection of the metal. The side-plates may be grooved or channelled on their rear faces, to assist in maintaining the mould at a proper temperature.
Patent GB-1497730-A (GB)
Title: Pulse width modulated signal amplifier arrangements
IPC: H03F1/42
Filed: 1975-03-26
Abstract: 1497730 Amplifier protection arrangements SONY CORP 26 March 1975 [30 March 1974] 12687/75 Heading H2K [Also in Division H3] A class d amplifier includes a protection circuit, provided to render the amplifier inoperative if a steady signal level persists at output 10 for longer than a predetermined time. The class d amplifier, including differential amplifier 4 and switching transistors 9a, 9b, drives a load (loud-speaker) via a low pass filter 12a, 12b. The output is fed via time constant network 22a, 22b to a differential amplifier including transistors 17a, 17b, in normal class d amplifier operation, the latter transistors having similar conductivity states, transistors 19a, 19b being non-conductive and transistor 21 being non-conductive to enable conduction of transistor 6, and hence the operation of differential amplifier 4. A steady signal at output 10 persisting for a time determined by network 22a, 22b, renders the conductivity states of transistors 17a, 17b, unsymmetrical and hence one of transistors 19a or 19b conductive, enabling transistor 21 to cut-off transistor 6 to render the differential amplifier 4 inoperative to switch both of transistors 9a and 9b off. By means of additional protection circuitry, Fig. 3 (not shown), the absence of the pulse width modulated signal T enables capacitor (29) to charge to a value determined by diodes (26) and the base-emitter of transistor 27, turning the latter transistor on, transistor 28 off and hence enabling transistor 21 to render transistor 6 non-conductive to render the class d amplifier inoperative.
Patent GB-1129731-A (GB)
Title: Device for suspending two curtains
IPC: A47H23/06
Filed: 1967-03-17
Abstract: 1,129,731. Suspending curtains. E. STORE, C. SCHEVE and E. RABELARSEN. 17 March, 1967, No. 12746/67 Heading A4B. A curtain support comprises a board 1 with a front guide channel for runners 8 supporting a rear curtain PG and a rear guide channel 2 slidably supporting the rear ends of arms 4 slidable on and over the top of the board 1 and carrying a front curtain SG at their free front ends 6. The rear ends of the arms 4 may carry rollers 5 or plastics sliders. Each arm 4 carries on its underside a slider 7 or roller which bears on the top of the board 1. The arms 4 may be of Z-section to permit overlap of adjacent arms.
Patent GB-842059-A (GB)
Title: Fine-tuning mechanism
IPC: H03J1/14
Filed: 1958-04-22
Abstract: 842,059. Adjusting radio tuning controls. ALADDIN INDUSTRIES Inc. April 22, 1958 [Sept. 26, 1957], No. 12767/58. Class 40(5). A high frequency tuning mechanism comprises a shaft 11 coaxial with a shaft 15 which carries a cam such as 19. The cam follower such as 22 is pivoted as at 21 and engages a spring arm 23 frictionally mounted on the shaft 11 so that rotation of the shaft 15 produces a limited slow rotation of shaft 11. In the embodiment described, fine tuning of a television receiver having separate VHF and UHF tuners is achieved by a common knob 18 attached to the shaft 15. Rotation of the knob 18 controls the VHF fine tuning directly and provides a small adjustment of the UHF tuning via the cam and follower mechanism. The cam follower 22 is coupled to the UHF manual tuning shaft 11 via a spring wire 23 looped around a groove in the shaft 11 at 23a and supported by a compression spring 25. The cam 19 may be replaced by a spiral cam as in Fig. 4 not shown so as to provide a fine tuning over 540‹ rotation of the knob 18. The UHF tuner 13 may comprise a variable capacitor or a resonant cavity.
Patent GB-1415192-A (GB)
Title: Braking systems for vehicles
IPC: B60T8/40
Filed: 1972-03-18
Abstract: 1415192 Automatic control of brakes LUCAS INDUSTRIES Ltd 5 March 1973 [18 March 1972] 12793/72 Heading F2F A braking system for a vehicle in which the brakes are controlled automatically, as for example by a radar device to prevent collision with another vehicle, includes a vacuumoperated booster for a master cylinder and a comparator 42 which receives a signal representing the required braking pressure and a further -signal representing actual braking pressure which is obtained by measuring the pressure drop across the vacuum booster, the comparator output providing a brake control signal. The booster comprises a casing 26 divided into two chambers 27, 28 by a diaphragm 29 of which chamber 27 communicates with the engine inlet manifold via a passage 35 and with a valve 21 controlling communication with atmosphere via passages 23, 24 and a filter 25 or via a control valve 32 with chamber 28. The valve 21 is operated by a piston 15 which can be moved against a spring 16 by hydraulic pressure from a master cylinder when the brakes are applied, such movement of piston 15 closes passage 23 and allows-air to flow to chamber 28 causing diaphragm 29 to move a piston 13 and apply the -brakes. A transducer 44 such as a carbon pile or a diaphragm operating a potentiometer provided an electrical signal dependent on the difference in pressures between the chambers 27, 28 and the output of the comparator operates the valve 32 to vary the air admitted to chamber 28 and hence the difference in pressure.
Patent GB-238625-A (GB)
Title: Improvements in or relating to concrete and like structures
IPC: E04B2/30
Filed: 1924-05-24
Abstract: 238,625. Clifton, W. E., and Clifton- Ewart Construction Co., Ltd. May 24, 1924. Walls; wall-ties.-An upright stud or stanchion having longitudinal lateral recesses adapted to receive the margins of inner and outer slabs forming the wall surfaces, is built up of two parallel members 10, moulded of concrete, plaster or the like, which are spaced apart by a number of transverse ties or struts 12. The ties are preferably secured to screw elements embedded in the material of the side members. As shown in Fig. 1, bolts 11 are embedded in the members 10 and the angled ties 12 are secured to the bolts by nuts 13. In the modification shown in Fig. 2, right and lefthanded screwed sockets 14 are embedded in the members 10. A stanchion for use at an angle of the building has one of the side members 15, Fig. 4, made L-shaped. the other member 10 being connected by ties 12 to one limb only. The space between the surfacing slabs may be filled in with grouting and reinforcing wires 16. Fig. 4. or the like may be used. Specifications 139,294, 153,633, 166,402, 176,868, 185,222, and 231,545, [Class 87 (ii), Moulding plastic &c. substances], are referred to.
Patent GB-514214-A (GB)
Title: Improvements in or relating to skates
IPC: A63C1/30
Filed: 1938-04-29
Abstract: 514,214. Skates. GERSCHWEILER J., and SHARP, H. G. April 29, 1938 No. 12817. [Class 132 (i)] A skate blade 4 is provided with teeth or serrations 10 at or near the heel. It may also be provided witl the usual teeth or serrations 9 a the toe end.
Patent GB-316641-A (GB)
Title: Improvements in and relating to the dyeing of fabric
IPC: D06P5/13
Filed: 1928-05-01
Abstract: 316,641. Robertson, T. E. May 1, 1928. No Patent granted (Sealing fee not paid). Bleaching, processes and materials for. - The colours of dyed fabrics formed for example of cotton cotton unions (with wool or silk), or silk dyed with aniline dyes, are transformed by treatment with a first solution obtained from sodium bisulphite and zinc, next adding a second solution obtained from sodium bisulphite, zinc and the liquor resulting from the treatment of crude coal tar naphtha with sulphuric acid, then gradually raising the temperature till the preselected colour, available within the range, appears, and finally arresting the transformation and fixing the colour by means of a reagent such as acetic acid or sodium bisulphate. Dyestuffs may be added to the mixed solutions to obtain particular effects outside the range. Silk dyed with aniline black may be transformed to yellow by adding Chlorazol fast yellow with the second solution, to red by adding Safranine-T powder, or to blue by adding Union pure blue BB. Mixtures of dyes may also be used. The quantities of dyes used will be less than would be required to produce the same shades from completely stripped material. According to the Provisional Specification, the final colour of materials subjected to slowly acting stripping solutions may be controlled by varying the concentrations and temperatures. Also in lieu of sodium bisulphite in the first and second solutions, there may be used respectively sodium bisulphate, and a mixture of sodium sulphite and sodium sulphate, with untreated coal tar naphtha in the second solution. Reference has been directed by the Comptroller to Specification 305,922.
Patent GB-586014-A (GB)
Title: Spark plug and method of making the same
IPC: H01T13/36
Filed: 1944-07-05
Abstract: 586,014. Spark-plugs. BENDIX AVIATION CORPORATION. July 5, 1944, No. 12860. Convention date, July 13, 1943. [Class 7 (iv)] A spark-plug has a tubular insulator with a central bore of two diameters with an electrode located in the smaller bore and a terminal entering the larger bore, the terminal and electrode being connected by a conductor which is embedded in a rigid mass of non-conducting material consisting of lead oxide as a major ingredient and at least one other major ingredient having a higher melting point than lead oxide. In Fig. 1, the screwed body 10 is fitted with an outer electrode 13 coacting with the enlarged head portion 14 of a central electrode 15 mounted in a slightly tapered ceramic insulator 18 and having a reduced portion between shoulders 22 which fit with slight clearance in the insulator bore. The reduced portion is roughened by sand-blasting and wrapped with several layers of thin metallic foil so that the wrapped electrode is a tight sliding fit in the bore and the head 14 is accurately centred. These layers provide sufficient yield to prevent cracking of the insulator at high temperatures. The connection to the electrode consists of a terminal 24 at the upper end of the insulator preferably engaging a resistance 25 of between 75 and 10,000 ohms, the resistance being connected to the electrode by a coil of thin wire 26. An enlarged upper part of the insulator bore is filled with sealing material 27 composed of 5 parts of aluminium oxide and two parts of lead oxide. Alternatively the aluminium oxide may be replaced by talc, magnesium oxide, bentonite or other clays. The mixture becomes plastic when heated to a temperature above the operating temperature of the spark-plug. The wire 26 is attached to the electrode before its insertion in the insulator, after which powdered sealing material is added and the resistor and terminal 24 put in position and the assembly heated until the powder becomes plastic and the resistor and terminal reach their final position by applied pressure. The electrode assembly is mounted in the body by a tapered copper or other soft metal member 30 which is held in position by a screening assembly comprising an insulating sleeve 32 enclosed by a metal barrel 31 silver soldered to the body at 35 while a downward pressure of 1,500 lbs. is applied to wedge the member 30 into position. The sleeve is centred by one or more layers of sheet asbestos 34. The space 36 between the insulator and the sleeve 32 may be filled with an insulator such as polymerized cashew-nut-shell oil or polymerized linseed oil. In a modification the body and shielding sleeve may be formed as a single unit.
Patent GB-495376-A (GB)
Title: Improvements in and relating to a method of and means for the manufacture of easily frangible vessels, bulbs and the like
IPC: C03B23/09
Filed: 1937-05-05
Abstract: 495,376. Glass manufacture ; fireextinguishing. ATLAS SPRINKLER CO., Ltd., and CHISHOLM, D. H. May 5, 1937, No. 12876. [Class 56] [Also in Group XXI] A frangible bulb, for use as a strut to support the valve in an automatic sprinkler or fireextinguisher, is made of glass or like material and has a cylindrical medial portion of substantially uniform wall thickness and closed end portions. The bulb is made from a tube 1, Fig. 1, by heating the ends of the tube until the glass is soft, and then closing or shaping the softened ends by the pressure of shaping-tools 2, 3 or by means of a mould 5, Fig. 3. The tube may be held by spring fingers 17, Fig. 5, secured to the lower end of a shaft 15 which can be rotated by a driving shaft 30 and moved longitudinally by means of a lever 40. A mould 38 is arranged coaxially, and rotated in unison, with the shaft 15. A rod 51, slidable within the shaft 15, is used for removing the finished bulb from the fingers 17. The end of the tube between the fingers 17 is softened by heating, and the lever 40 is then moved to force the softened glass into the mould 38. In another construction, the fingers may be mounted on the end of a shaft which is provided with a heat-insulating covering to enable the device to be held in the hand. In a further construction, the tube is held in an aperture 53, Fig. 7, in a disc 52 which is rotatably mounted in grooved supporting-pulleys 54 driven by a belt. The end of the tube, when softened by heat, is shaped by the pressure of suitable rollers 65, 66 mounted on arms 63, 64, respectively, pivoted to the base of the apparatus. The moulds and shaping-tools may be heated if desired.
Patent GB-1090651-A (GB)
Title: Two-coordinate lock-out circuits
IPC: H04Q3/00
Filed: 1965-03-26
Abstract: 1,090,651. Automatic exchange systems. STANDARD TELEPHONES & CABLES Ltd. March 26, 1965 [March 31, 1964], No. 12915/65. Heading H4K. A two-co-ordinate relay selector has a crosspoint such as Uij in which relays of a column or row are connected up by selector contacts s to find battery over a series connection of contacts r1 and earth over a series connection of contacts r2 of a column, back contacts of r2 energizing a relay P common to the row so as to lock out all other relays R in the row, and back contacts of a chain of contacts r3 in the row providing a holding earth for the energized R relay. Actuation of all the contacts s of a column results in only one relay R locking up in the column. Actuation of all the contacts s of a row results in the energization of the left-hand-most relay R in a free column since holding earth is supplied from the left over the contact chain r3. The row relays may be governed by a 1 out-of n check circuit.
Patent GB-387188-A (GB)
Title: Improvements in and relating to convertible tea and card and the like tables
IPC: A47B13/08
Filed: 1932-05-05
Abstract: 387,188. Fastenings. WALKER, F. E., 4, Collamore Avenue, Wandsworth Common, London. May 5, 1932, Nos. 12925 and 12926. [Class 44.1 A spring bolt D, designed to keep a table top in position, consists of a plunger 10 in a cylinder 5. It may be retracted by a finger piece 13 against a spring 9, and secured by moving the stop pin 11 into the head of a right-angled slot.
Patent GB-393742-A (GB)
Title: An improvement in or relating to fabric dyeing machines
IPC: D06B3/26
Filed: 1932-05-05
Abstract: <PICT:0393742/IV/1> <PICT:0393742/IV/2> For supporting the endless rope of fabric in a winch dyeing-machine, there is provided in place of the usual winch or roller an endless travelling lattice or conveyer supported on pulleys or rollers of small diameter at the sides of the dyeing vessel.  Alternatively, in place of the endless conveyer there may be employed a series of small rollers arranged in close parallel formation and driven to rotate uniformly in the same direction. As shown, shafts c, d mounted on brackets b at the ends of the vessel a, carry pulleys c<1>, d<1> on which belts e, f are supported.  To the latter are attached by means of plates e<1>, f<1>, transverse bars g which support the rope of fabric.  It is convenient to cause the upper run of the conveyer to follow a curved path, for which purpose the belts e, f at this part of the conveyer may be supported by intermediate small pulleys i.  At the entry side a small non-circular roller j may be provided in order to assist in the cuttling-down of the fabric, or the pulleys d<1> may be made non-circular for the purpose. According to the Provisional Specification there may be provided at the point where the rope leaves the liquor a shaft or roller with projecting fingers or forks which turn over and open out the folds of the fabric.
Patent GB-702000-A (GB)
Title: Multi-layer glass sheet having an interlayer reversibly changing its light transparency when subjected to changes in temperature
IPC: G02B5/23
Filed: 1951-05-31
Abstract: 702,000. Temperature indicators. KUHL, G. W. May 31, 1951 [Feb. 4, 1949], No. 12995/51. Class 97(3) [Also in Group VIII] In a multi-layer glass sheet having an interlayer which reversibly changes its transparency to light when subjected to changes of temperature, the interlayer contains polymers such as methyl polyvinyl ethers, and/or methyl cellulose and/or polyglycol ethers and/or alkaline earth compounds of polyacrylic acids, such substances changing from the sol to the gel state when a predetermined temperature is exceeded and reverting to the sol state on again falling below that temperature. For changing the conversion point there may be added to the interlayer substances favouring the sol state or substances impeding the sol state. Examples of the former are univalent alcohols such as methyl alcohol, ethyl alcohol, polyvinyl alcohol, or ketones such as acetone; examples of the latter are polyvalent alcohols such as glycerine or glycols, and/or ammonium hyroxide. One or more protective colloids may be added to the interlayer. The interlayer may be in liquid form or may be a solid film; it may contain a substance which readily absorbs light by conversion into heat. The interlayer may contain a mixture of colouring agents one or more of which may be precipitated on conversion of the coagulating substance or substances to the gel state; a mixture of rufigallic acid and methyl blue changes from green to blue at the conversion temperature. The multi-layer sheets may be used as windows of greenhouses, hot-beds and the like. The change of state of the interlayer may be produced at will by heating by hot air or by alternating current passed through filaments or between electrodes therein.