baber/WOPTO huggingface dataset:
Patent GB-736760-A (GB)
Title: Multi-stage semi-conductor signal translating circuits
IPC: H03F3/30
Filed: 1953-11-03
Abstract: 736,760. Transistor amplifying circuits. RADIO CORPORATION OF AMERICA. Nov. 3, 1953 [Nov. 15, 1952], No. 30370/53. Class 40 (6). In a cascaded earthed emitter amplifier, a direct connection is used between succeeding junction transistors which are of opposite conductivity type. Two parallel paths may be utilized to give push-pull operation and the transistors may be biased for class B or pulse working. The circuit of succeeding transistors may be modified to reduce the effects of collector-base leakage. The emitters of the PNP junction transistors 10, 35, Fig. 1, are biased positively by supply 19 and those of the NPN transistors 25, 45 biased negatively by supply 27. Direct connections 22, 33, 43 are arranged between the collector of one transistor and the base of the next, the input 14 being applied to the base of transistor 10 and a load 50 is arranged in the collector-emitter circuit of transistor 45. The load 51 may be removed and load 50 returned to earth. The emitter bias of the first transistor 62, Fig. 2, may be omitted to give class B or pulse operation, only positive inputs being effective since the collector current is small in the static condition. Two circuits may be arranged in parallel, Fig. 3 (not shown) using opposite conductivity types of transistor to give class B push-pull working, each circuit being operative over a half-cycle, and the outputs feeding a load in parallel. The collector base leakage may be minimized, Fig. 4, by a resistor 128 in the emitter circuit. Leakage causes the base to be more positive relative to the emitter than would otherwise be the case so that increased emitter-base current results. The use of resistor 128 results in a back-voltage which opposes this flow of current, the base being tied to battery 129 over resistor 133. The resistor 128 may be by-passed for signal frequencies by a capacitor 134 and the high-frequency response may be improved by the use of an inductor in series with resistor 133, Fig. 5 (not shown).
Patent GB-886623-A (GB)
Title: Filters
Inventor: ONION GEORGE
IPC: B01D29/07
Filed: 1959-09-07
Abstract: 886,623. Filters. C. A. V. Ltd. Sept. 2, 1960 [Sept. 7, 1959], No. 30429/59. Class 46. A filter assembly comprises a filter 3, as claimed in Specification 693,495, mounted within an annular cylindrical container 4 which is open at one end, and at its opposite end has an annular and outwardly dished end wall 5 in which are formed a plurality of angularly spaced holes 6. The container is sealed between a body 8, having a liquid inlet 9 and outlet 10, and a bowl 11 which has a plurality of radial webs 23. In a modification, Fig. 2 (not shown), the bowl has a drain plug 24 for removal of sediment without dismantling the assembly.
Patent GB-520406-A (GB)
Title: Improvements in or relating to clutches
IPC: F16D13/64
Filed: 1938-10-21
Abstract: 520,406. Friction clutches; flexible couplings. BORG-WARNER CORPORATION. Oct. 21, 1938, Nos. 30495, and 30496. Convention dates, Nov. 8, 1937, and Feb. 18, 1938. [Class 80 (ii)] A driven clutch plate comprises a disc having portions arranged to cushion the engagement by a torsion action and portions arranged to cushion the engagement by a bending action. As shown in Figs. 1, 3 and 4, the outer region of the disc 2 is of spoke formation, each spoke comprising a neck 12 terminating in a head which consists of a central portion 13 which, in the disengaged condition of the clutch, is inclined to the plane of the disc as shown in Fig. 4, and end wings 14 and 15 which are bent relative to the portion 13 so as to be parallel to the plane of the disc. Facings 21 and 23 are riveted to the wings 15 and 14 respectively. As the clutch is being engaged, each spoke is first subjected to a twisting action about its radial centre line until the extreme edges of the wings 14 and 15 contact with the facings 21 and 23 respectively. Thereafter, the wings 14 and 15 tend to straighten while the twisting action continues. As a result, the deflection-load curve is relatively flat during the initial stage but steepens as the bending action commences. Apertures 50 and 51 may be formed in the heads. As shown in Fig. 16, the rivets may be located on the bend lines and the wings 14 and 15 may extend to a desired extent back towards the opposite facings, so that bending occurs at an earlier stage. Thus, the wings may extend into contact with the opposite facings, so that bending occurs at once, and they may even be pre-loaded. As shown in Fig. 9, each spoke has a neck 32 terminating in a head 33 formed with one wing 34 only. The spokes are twisted alternately in opposite directions, so that the wings of adjacent spokes are disposed on opposite sides of the disc, the facings 37 and 39 being riveted each to one of the sets of wings. The edge of each head 33 remote from its wing lies substantially in the plane of the disc. As shown in Fig. 11, alternate spokes 62 lie in the plane of the disc, one facing 60 being riveted thereto, while the other spokes 64 are all inclined in the same direction and have each a single wing to which the other facing 61 is riveted, the edge of each spoke 64 remote from its wing being in contact with the facing 60. The disc 2 is connected to a hub 1, Figs. 1 and 3, splined on a driven shaft, by a vibrationdamping arrangement comprising coil spring 3 located in aligned openings in the disc 2, in a flange 4 of the hub, and in a washer 5 secured to the disc 2 by rivets 6 which pass through clearance notches 7 in the flange 4. Rivets 8, each with a spring washer 9 at one end, pass through the members 2 and 5 and through clearance slots in the flange 4, friction washers 10 being arranged between the disc 2 and the flange 4 and between the washer 5 and the flange 4, so as to provide a frictional damping effect.
Patent GB-831498-A (GB)
Title: Container for storing and dispensing pulverulent materials such as salt, pepper or the like
IPC: A47G19/24
Filed: 1956-10-08
Abstract: 831,498. Powder distributers. ROALD, O. Oct. 8, 1956, No. 30547/56. Class 18. A container for storing and dispensing powder comprises outer casing 1, with an aperture 2 at the upper end and an aperture 3 at the lower end, and an inner casing 4 with tubular projections 5 and 6 at its ends which fit closely into the apertures 2 and 3. A spring 7 between the inner and outer casings presses the inner casing against the bottom 8 of the outer casing. The projection 5 has radial openings 9, 10, 11 normally covered by inwardly projecting walls of the aperture 2, and the projection 6 has a filling orifice with a closure 12. To dispense powder, the closure 12 is pressed so that the openings 9, 10 and 11 are moved outside the top end of the outer casing.
Patent GB-943094-A (GB)
Title: Improvements in or relating to articulated slip joint assemblies for straight and angle dental handpieces
IPC: A61C1/02
Filed: 1960-09-05
Abstract: 943,094. Dental handpieces. A. KALTENBACH, and E. HOFFMEISTER. Sept. 5, 1960 [Sept. 7, 1959], No. 30554/60. Heading A5R. In a slip joint connection for dental handpieces, a tool-holding connection member has spaced from one side a hinge part to which it is pivotally connected by an arm pivoted on an elbowed extension of a swivel part mounted on the connection member at the side remote from the hinge part, the arm extending over or transversely of the rear of the connection member. As shown, Fig. 1, a connection member 1 comprises a pulley 3 adapted to be rotated by a drive cord and a swivel part 6 with an extension 7 carrying a pivot 8. An eye 10 at the end of an arm 9 bears on the pivot 8, movement therebetween being limited to about 240 degrees by the engagement of a pin 11 on the extension 7 with stops 12 at the ends of a groove in the eye 10. The other end 13 of the arm 9 is pivoted at 15 on a hinge part 5 which carries a pair of guide pulleys 4 for the drive cord. A nose 16 on the end 13 is adapted to abut a stop 17 on the hinge part. Also pivoted on the hinge part is a coupling member 18 for the engine rods (not shown) with a nose 20 adapted to abut a stop 21.
Patent GB-1007802-A (GB)
Title: Improvements in and relating to tubular heat exchangers
Inventor: DAWSON JAMES WALTER WILSON
IPC: F22D1/16
Filed: 1963-08-02
Abstract: 1,007,802. Tubular heat exchangers. C. A. PARSONS & CO. Ltd. July 17, 1964 [Aug. 2, 1963], No. 30697/63. Heading F4S. In a shell and tube heat exchanger, e.g. a boiler feed-water heater for steam turbine plant, the tubes 2 are joined at their ends to a header member 3 in which ducts 7 are formed extending transversely with respect to the tube ends, each duct communicating with at least one tube- As shown, communication is by drilled holes 9 closed at their external ends by plugs 10. The ducts ,7 preferably empty into cross ducts 8 formed within (as shown) or externally of the member 3 to carry feed-water to or from the tubes. The header member 3 may be a flatsided plate of circular or polygonal form or a sphere having a flat surface formed thereon to which the tubes are joined. The holes 7 need not be circular.
Patent GB-957201-A (GB)
Title: Device for the chemical analysis of materials by means of photocells according to thespectral method
IPC: G01J3/36
Filed: 1960-09-06
Abstract: 957,201. Photo-electric spectrometers. REGIE NATIONALE DES USINES RENAULT. Sept. 6, 1960 [Sept.12, 1959], No.30706/60. Addition to 912,882. Heading G1A. This invention relates to a modification of the detector arrangements used in the apparatus for spectro-chemical analysis described in the parent Specification. These detectors operate to actuate a relay when the integrated output of an associated photo-cell reaches a pre-determined level. In the present detector arrangement the output of the integrating means is fed to input 60 and a reference current of the required value to input 61. The difference between these signals is amplified and fed through limiter 149 to sensitive relay 150. This relay controls the bias applied to thyratron 151 which controls relay 57. When the inputs are different the contacts of the relay 57 are in their normally closed condition but when the integrated output reaches the reference level the contacts of relay 150 close to cause the thyratron to open the contacts of relay 57.
Patent GB-1463315-A (GB)
Title: Apparatus for forming a stack of articles
IPC: B65G57/06
Filed: 1973-06-28
Abstract: 1463315 Stacking HENRY SIMON Ltd 19 June 1974 [23 June 1973] 30910/73 Heading B8C A method of stacking articles comprises forming a layer of an article or articles on a support 11, raising the support to above the height of a stack being formed on a surface 14, advancing the support and layer over the surface, and then retracting the support while restraining the layer by means of a stop 16 so that the layer falls on to the stack, and wherein the stop 16 is lifted before advance of the support and is then lowered and advanced against the rear end of the layer to locate it against a stop 21 before retraction of the support. Articles are manually arranged on a ball deck 10 at the edge of the support 11 which comprises rollers drivable by a belt 20 and mounted on a platform. The platform is mounted for vertical movement on chains 13C and carries a pneumatic ram to advance the support. A photo-electric cell senses the height of the stack and controls the raising of the platform. The articles may be stacked on a pallet located on a roller conveyer forming the surface 14.
Patent GB-625323-A (GB)
Title: Improvements relating to the production of paper and the like
IPC: D21H17/67
Filed: 1945-10-19
Abstract: Paper &c. of high wet strength for wrapping food &c. contains a finely-divided porous absorbent substance, e.g. carbon, zeolite, or an alumino-silicate.  An impermeable ply may be adhered to such paper.
Patent GB-859947-A (GB)
Title: Improvements relating to cushioned seating components
Inventor: JENNINGS FREDERICK CHARLES
IPC: A47C27/16
Filed: 1956-10-12
Abstract: 859,947. Cushions &c. DUNLOP RUBBER CO. Ltd. Sept. 10, 1957 [Oct. 12, 1956], No. 31095/56. Class 52(4) A cushioned seating component for a chair has a covering 11 of leathercloth, textile fabric or other material, padding 12 of polyurethane foam, foam rubber or other material, a base 13 supporting the padding and a backing sheet 14, the backing sheet and either the cover or the padding being joined together along their peripheral portions. The base 13 may be rigid, of plywood or synthetic resin or a frame across which extend flexible members, resilient such as tension springs or inextensible as webbing, the backing sheet being hessian. Specification 748,990 is referred to.
Patent GB-1445734-A (GB)
Title: Data transmission system pilot controlled devices
IPC: A01F25/04
Filed: 1973-06-29
Abstract: 1445734 Automatic gain control SIEMENS AG 29 June 1973 [18 July 1972] 31135/73 Heading H4R The level of a transmitted pilot wave is monitored at a receiver which is disconnected if pilot amplitude falls outside determined limits, by a controller whose output voltage level is compared with an auxiliary signal derived from controller output setting. In this way, criterion for shut off is not dependent wholly on output level but is also controlled by input level of controller circuit. The arrangement is stated to avoid a situation in which a slow drop in pilot signal level will delay an alarm until signal levels are too low, i.e. such that a fault will have been in existence for some time. Input signals at Pe pass through amplifier LV to a unit G which may be a hybrid coupler, with terminal Pa coupled to a utilization device. The pilot frequency is led to an amplifier/ rectifier PE coupled to one input of a differential amplifier DV1 also receiving a reference voltage U. Output of PE is also led to further differential amplifiers DV2-DV4. The output of DV1 is led to a capacitive store RS maintained at a voltage immediately prior to opening of a switch by a MOS-FET transistor; the output from this is fed to a linear converter U output from which is supplied to a control element, e.g. temperature dependent resistor in amplifier LV giving a non-linear characteristic such that input level = output level-instantaneous amplification. Output lead SA connects to a display or indicating instrument and or alarm. Amplifier DV2 also receives a voltage Us and if rectifier PE voltage is greater than this the switch in RS is closed but if rectified voltage becomes lower, the switch is opened and hence disconnects the control action; an alarm may also be energized. Alternatively the alarm may also be operated when the rectified pilot voltage is outside limits determined by reference voltages defining Œ4dB levels by coupling amplifiers DV3-DV4 through OR gate OG. In an alternative arrangement, Fig. 2 (not shown), the pilot frequency is filtered by hybrid coupler G with a transistor (T2) supplying the non-linear resistor and a transistor (T3) supplying a - 6dB bias. The non-linearity of the control resistor in LV may be compensated by a diode D biased by a voltage divider comprising resistors R7, R8 which ensure that voltages S is substantially proportion to Us. A differential amplifier DV2 is used as in Fig. 1.
Patent GB-1010017-A (GB)
Title: Gasblast circuit-breaker
IPC: H01H33/867
Filed: 1964-08-04
Abstract: 1,010,017. Gas blast switches. BROWN, BOVERI & CO. Ltd. Aug. 4, 1964 [July 31, 1963], No. 31175/64. Addition to 974,587. Heading H2B. A gas blast circuit breaker of the type described in the parent Specification is modified so as to be both opened and closed by means of gas pressure on the piston 6b so as to dispense with the strong closing spring. To open the breaker a valve 12 is drawn downwards to close an opening 10 and vent the chamber 15 behind piston 6b through opening 14. As the contacts open a blast of gas extinguishes the arc. Since the blast gas is supplied by a relatively narrow opening 8 the pressure in the contact chamber 9 falls. As soon as the arc is extinguished a series isolator is opened. Valve 12 is then returned rapidly to the position shown supplying pressure gas through the relatively large opening 10 to chamber 15 raising the pressure here above that in chamber 9 so that the contacts reclose. A light spring only thereafter holds the exhaust valve 5a closed.
Patent GB-208871-A (GB)
Title: Improvements in photographic cameras
IPC: G03B17/50
Filed: 1922-11-15
Abstract: 208,871. Stevens, W. R., Stevens, W. C., and Percival, E. T. Nov. 15,1922. Cameras with hand plate-changing, fitted with dark rooms and with means for preparing, treating, and copying negatives.-Relates to cameras of the kind having (1) an external foldable paper carrier which can be erected in front of the lens to support, for copying, a previously-prepared negative, and (2) means inside the camera for developing and fixing the exposed sheets. According to the invention (1) a paper carrier is provided inside the camera, slidable in a guideway in the top wall of the camera, and adapted to be held in position against externally-operable stops, (2) the carrier has two holders for papers of different size, and (3) the external papercarrier is mounted on a hinged lid adapted to close the front of the camera. The camera comprises a box a fitted with ruby windows, and having an extensible lens b, and a rear hinged door d, an aperture in which is fitted with a flexible light-tight sleeve e. Inside the box are containers m, n for two different sizes of sensitive paper, and a carrier o, slidable in guides, o<2> to and from the lens, for supporting the paper in focal position. Tanks f, h, i are provided for developing, fixing and washing, the tanks h, i being mounted to rotate about a rod carried by a removable plate k having a hinged lid l normally covering the outer tank. The carrier o has a hinged frame p to receive the larger size of paper, and on this frame is fitted a rotatable frame q for the smaller size. This frame, which carries a focusing screen, is arrested by a stop s<1> in position to present the small paper either horizontally or vertically to the lens. On the front of the box is a hinged door u, carrying a bracket t which may be racked to and from the lens when the door u is held in horizontal position by stays v. The bracket carries a hinged frame t<1> to which is hinged a smaller frame t<11>, these frames being adapted to receive papers carrying negative images made in the camera. In operation, the door u is swung down into the position shown in dotted lines, and the image of an object is focused on the focusing-screen in frame p, with the carrier o resting against the front of a stop x. The carrier o is then adjusted with its front or rear base against the stop x, according to the size of negative required. A piece of paper from the container m or n is inserted in the appropriate holder p or q by a. hand inserted through the sleeve e, exposed, and developed, &c., in the tanks j, h, i. The door u and bracket t are then raised into the position shown in full lines, and the negative is inserted in the frame t or t<11>. The carrier o is adjusted. in position against one of three stops x, x<1>, y, according to the size of positive desired, and the operations are repeated to produce a positive copy from the negative. The stops x, x<1> may be withdrawn to allow the carrier o to pass.
Patent GB-855767-A (GB)
Title: Improvements in and relating to polyacrylonitrile solutions
Inventor: STARKEY RONALD JAMES
IPC: C08F220/44
Filed: 1957-10-07
Abstract: The process of the parent Specification is modified in that solutions of acrylonitrile polymers are obtained by polymerizing acrylonitrile alone or with up to 20% of one or more other monomers such as styrene, methyl acrylate, vinyl acetate, itaconic acid or vinyl pyridine, in a concentrated aqueous or aqueous/alcoholic solution of sodium or calcium thiocyanate containing ammonium ions in the presence of a non-oxidising polymerization catalyst forming free radicals.  The ammonium ions may be introduced by adding ammonia or an ammonium salt, e.g. the thiocyanate, to the solution.  The solution may also contain a reducing agent which is inert to the catalyst such as thiourea dioxide and the catalyst may be azo-bis-isobutyronitrile.  The polyacrylonitrile solutions obtained may be extruded into a coagulant bath to form fibres and then stretched or formed into filaments, ribbons or films.  Specification 824,361 also is referred to.
Patent GB-191241-A (GB)
Title: Improvements relating to steam dryers
IPC: F22B37/30
Filed: 1921-11-23
Abstract: 191,241. Mossop, A. I., (Kappstein, 0.). Nov. 23, 1921. Separators. - The steam passes through perforated plates arranged in a casing a so that plates c with openings at their circumferences alternate with plates d having openings f, g, formed by stamped tongues distributed over their entire surfaces. The openings increase in size towards the centre of the plates which are separated by distance-rings e.
Patent GB-351366-A (GB)
Title: Improvements in or relating to high tension condensers
Filed: 1930-10-20
Abstract: 351,366. Condensers. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, 13D, Emmasingel, Eindhoven, Holland. Oct. 20, 1930, No. 31403. Convention date, Oct. 28, 1929. [Class 38 (ii).] Conducting plates inserted in the dielectric layers which separate the active plates of a condenser, instead of being left isolated are connected together when they are in positions representing corresponding potentials with respect to the active plates. Thus, in Fig. 3, the plates 4, 5 are each equidistant from the respective active plates 1, 2 and are interconnected. In Fig. 4, where there are two conductive plates between each pair of active plates, plates 7, 8 and 9, 10 would be interconnected as shown. By so doing, if the resistance of a part of the dielectric falls, the potential distribution throughout the remainder of the dielectric alters to lessen the overload on the parts, the resistance of which remains high.
Patent GB-673059-A (GB)
Title: Simultaneous control system for a plurality of picture signal characteristics
IPC: H04N9/76
Filed: 1950-12-29
Abstract: 673,059. Television. STANDARD TELEPHONES & CABLES, Ltd. Dec. 29, 1950 [Feb. 25, 1950], No. 31583/50. Class 40 (iii). A plurality of different characteristics of an image signal-producing system is controlled by a plurality of adjustable means the individual adjustments of which are pre-set in a storage device which is subsequently operated to cause the adjustable means to take up the pre-set adjustments. In the described embodiment, which is concerned with controlling the colour balance in a three component-colour film television transmission system, each colour channel 11, 12, 13 is. provided with two potentiometers 18, 21; 19, 22 and 20, 23 (e.g. controlling contrast and intensity) which are individually coupled (by mechanical means) to separate rotatable shafts 30-35 of a device 36 (which may be similar to a calculating machine of known form) in which, by means of keys 37, the degree of rotation of each shaft may be pre-conditioned so that on subsequent operation of a control lever 39 the shafts are caused to rotate the desired amount. In operation the film is first pre-viewed and a programme sheet 38 (or a pre-set coding device 48) which indicates the correct adjustment (or in which the correct adjustment is pre-set) for the various scenes is prepared, the sheet being employed for manual operation with an operator viewing the image on a monitoring device 16 and operating the keys 37 according to the sheet indications, and the coding device being employed for automatic operation by arranging for the operation of the keys 37 to be effected by this device in accordance with the length of film run off.