baber/WOPTO huggingface dataset:
Patent GB-613212-A (GB)
Title: Improvements in and relating to frequency variation response apparatus
IPC: H03J7/04
Filed: 1946-06-05
Abstract: 613,212. Electric automatic control. BRITISH THOMSON-HOUSTON CO., Ltd. June 5, 1946, No. 17101. Convention date, June 8, 1945. [Class 38 (iv)] [Also in Group XL (c)] A means for stabilizing the frequency of an oscillator comprises means for deriving difference frequency oscillations from the oscillator and a source of fixed frequency, discriminating means for obtaining a voltage, variable with the difference frequency, and frequency determining means responsive to said voltage and controlling the frequency of the oscillator. The output from a local oscillator 1, Fig. 1, is mixed with that from a crystal oscillator 3 in a mixing circuit 4 and the difference frequency is passed through a filter 7 to a pair of shaping valves 12, 13, which feed square pulses into coupling condenser 27, the manner of operation being as follows. An incoming negative potential applied to the grid of valve 12 cuts it off and the rise in its anode potential causes valve 13 to draw current, so producing a sharp drop in potential across anode resistor 24. As soon as the controlling potential rises sufficiently for valve 12 to conduct, its lowered anode potential cut-off valve 13 whose anode potential rises sharply to a maximum. The abruptness of the change is increased by the change in current through cathode resistor 20, the resulting change in potential assisting the cutting off of valve 12. The output from resistor 24 thus consists of square waves of uniform intensity, see Fig. 2b, having the same frequency as the difference frequency, Fig. 2a, received from mixer 4. They are passed to the differentiating circuit comprising capacitor 27 and resistor 28, producing a series of pulses having the form shown in Fig. 2c which are fed to valve 10, and this is so biassed that only the positive pulses are effective and cause the valve to conduct, giving an output of the form shown in Fig. 2d. These pulses are integrated in the condenser-resistance combination 33, 32, the voltage across which, see Fig. 2e, is fed to valve 11 and so to lead 6 in such a sense that the potential of the lead is lowered in response to increased difference frequency from mixer 4, and thus controls the bias of the reactance valve 2 in such a way as to restore the frequency of oscillator 1 to agreement with that of oscillator 3.
Patent GB-882475-A (GB)
Title: Improvements in hair dryers
Inventor: GREIN PATRICK FRANCIS ALOYSIUS
IPC: A45D20/44
Filed: 1959-05-20
Abstract: 882,475. Hair driers. ALEXANDER & CO. Ltd., CHARLES. March 31, 1960 [May 20, 1959], No. 17130/59. Class 81 (2). In hair-drying apparatus, heated air is supplied to a hood by way of a pair of telescopic tubes 5, 6, are carrying the hood and the other being fixed, the hood-carrying tube being supported by a counterbalance weight 12 which is slidable axially of the other tube. A hair-drying hood comprising an outer shell and an inner perforated shell is connected to an upper air supply tube 5 which is telescopically slidable in an outer tube 6 which is disposed with a fan and a heater in the hollow back of a seat, above which the hood is located, or in a separate unit. The inner tube 5 is supported in the outer tube 6 by an annular counterweight 12 which is slidable on the outer tube and is connected to the inner tube by a wire 13, 15 which passes over pulleys 14 mounted on the outer tube. Bearings 10, 11 at the upper end of the outer tube and the lower end of the inner tube, respectively, prevent the passage of air into the space between the tubes. Specifications 882,473 and 882,474 are referred to.
Patent GB-700075-A (GB)
Title: Resilient mounting
Inventor: CAMPBELL BRUCE WILSEY
IPC: F16F7/08
Filed: 1952-07-08
Abstract: 700,075. Resilient mountings. LORD MANUFACTURING CO. July 8,1952, No. 17139/52. Class 108(3) A resilient mounting comprises spring means 10 carrying a vertical load acting between supporting and supported members 1, 3, one of the members (3) having a vertical cylindrical surface 19, a segmental cylindrical damping member 18 surrounding the surface 19 and resting on a horizontal surface afforded by the other member (1), and further spring means 13 and 20 urging the segments of the member 18 against the 'surfaces 1 and 19, respectively. Lateral and vertical deflections of the member 3 are limited by a rubber ring 8 secured in the mouth of a housing 1a The rate of the spring 10 may be non- linear. The friction damping force acting at the surface 19 is independent and at the surface 1 is substantially independent, of the load carried by the mounting.
Patent GB-236584-A (GB)
Title: Improvements in and relating to fluid operated brake systems
IPC: B60T11/16
Filed: 1925-07-03
Abstract: 236,584. Hydraulic Brake Co., (Assignees of Floraday, B. S.). July 3, 1924, [Convention date]. Pistons; piston-rods.-In an hydraulic brake system for vehicles comprising a cylinder 13 secured to the cover plate of a brake drum, the piston rods 34 have spherical ends engaging the operating levers 18 of the brake band 11 and a pair of pistons 26. Packings 37 of hard rubber normally contact with the pistons but are detached therefrom. A block 39 serving as a stop for the pistons and also reducing the volume of liquid required to fill the system is fixed in the cylinder 13. The liquid is introduced by a central radial channel in the cylinder 13. The pressure piston 52 working in a cylinder 51 secured to the vehicle chassis has a detached packing ring 53 similar to those of the pistons 26 and is connected at 59 to a pedal. The tendency to form a vacuum in the system if the piston 52 is forcibly withdrawn to release the brakes and the consequent admission of air past the piston packing rings if these are secured to the pistons is prevented by the use of the detachable packing rings. The possibility of the packing ring 53 being forcibly withdrawn may be further prevented by the provision of openings 69 in the piston 52. The packing rings by being detached and being made of hard material also remain impervious to the liquid and centrally of the piston. Aprons 33, 60 of rubber or leather secured to the cylinders 13, 51 and to the piston rods serve to exclude dust.
Patent GB-403384-A (GB)
Title: Improvements in or relating to record- or register-controlled printing mechanism
Filed: 1932-06-17
Abstract: 403,384. Typewriters &c. BRITISH TABULATING MACHINE CO., Ltd., Victoria House, Vernon Place, Southampton Row, London. June 17, 1932, No. 17155. Convention date, July 10, 1931. [A Specification was laid open to inspection under Sect. 91 of the Acts, June 28, 1932.] [Class 100 (iv).] Relay type-wheel actions ; hammer-impression arrangements.-In a record-controlled or registercontrolled printing-mechanism, of the kind comprising types rotating continuously past a printing position, and a device to read the characters from the record card or register and transmit an impulse to a printing-hammer at the moment when the selected type is opposite the printing position, there is no interruption of the motion of the type at the moment of impact, but the paper is stationary. The record may be a punched card of the Hollerith or Peirce type, and the register may be a counter, and suitable means of the brush and electric contact or pin-box type are provided in each case to transmit an impulse to a magnet 11, at a time allocated to the particular character. Sets of type 24, Fig. 1, arranged in opposed pairs, one pair for each column, are mounted on a rotating drum 23, which is driven from the shaft 20 of a driving-member 36, itself connected to the main drive of the tabulator or like machine. Through a hole 26 in a shield 25 printing may be effected on paper 27 by a hammer 35, a hammer and actuating-mechanism being provided for each set of type. The driving- member 36 is a fluted roller whose teeth 37 are adapted to engage a tooth 38 on a member 39 pivoted to a lever 40, which actuates the hammer 35. When magnet 11 is energised it attracts an armature 45 and pulls back a latch lever 47, thus releasing and turning a spring- loaded lever 44. A by-pass 43 on the lever 44, thereupon depresses the member 39 until the teeth 38, 37 engage and the member 39 is moved to the right and the hammer actuated. Towards the end of its movement, the tooth 38 is lifted out of engagement by the engagement of the end of member 39 with a cam surface 51, the hammer movement is completed by momentum, and the lever 39 returns to the position of Fig. 1. The lever 44 is relatched, when all the type has passed the printing point, by the action of a cam 53, acting through levers 54 and a bail or series of arms 56 &c. depress andrelatch lever 44. The paper 27 is line-spaced by a roller 29, which is rotated by pawl-and-ratchet mechanism, actuated by a cam 33 on the shaft 22 of the drum 23. In an alternative arrangement the levers 44 and 47 are modified in shape and are adapted to be re-latched by a projection on the member 39. Specifications 247,200, [Class 100 (iv), Typewriters &c.], 356,304, and 365,169, [both in Group XIX], are referred to.
Patent GB-1222436-A (GB)
Title: Nipper mechanism for combing machines
IPC: E04F11/108
Filed: 1968-04-10
Abstract: 1,222,436. Nipper mechanism for combing machines. MASCHINENFABRIK RIETER A.G. 10 April, 1968 [27 Sept., 1967], No. 17199/68. Heading DIN. The top nipper 1 of a nipper mechanism is pivotally mounted at point A on a 'bottom nipper 4 and is reciprocable through arms 5, 6 .by means of an oscillating drive shaft 7, and the closing movement of the top nipper 1 is imparted through a spring loaded rocker arm 10 pivotable about two points D and E, the arrangement being such that the point D describes a curve Ks during the reciprocatory movement which is such .that the nippers are decelerated towards their point of closure N, and thus close gently. A counterbalance H is in equilibrium with the nipper mass and is connected to the top nipper through a curved link 13 which is reciprocated .by a crank lever 14 from the drive shaft 7. The counterbalance H is also connected to the shaft 7 through an arm 18 and crank 19. Closure curve Ks is such that at part N the angle between its tangent and that of the curve Kt which point D would describe with the nippers permanently closed is at most 15.
Patent GB-172254-A (GB)
IPC: A43C11/02
Abstract: 172,254. Miller, F. C., and Miller, Ltd., F. C. March 17, 1921. Fastening; with attachments for special, purposes. - An attachment for additionally securing a shoe comprises a strip of leather or other material a folded upon itself to form a loop d at one end through which passes a loose fastening-strap e, and tongues h at the opposite end, which tongues embrace the edge of the shoe upper at the heel and are secured thereto. More than one loop d and fastening- strap may be provided.
Patent GB-1172793-A (GB)
Title: Improvements in and relating to Folding Caravans.
Inventor: BRANFIELD MALCOLM MERVIN
IPC: B60P3/34
Filed: 1968-04-10
Abstract: 1,172,793. Collapsible vehicles. M. M. BRANFIELD and C. E. NISSEN. 10 April, 1968 [24 April, 1967; 29 Feb., 1968], No. 17264/68. Heading B7B. A caravan has half-height walls 5 rigidly secured to a wheeled chassis and pivotally supporting at 11 two end portions 7 provided with rollers, &c. 24 to engage tracks 50 carried by the roof part 13. The upper parts 5a of the walls are foldable inwardly to a horizontal position and the end points 14 of the roof also pivot downwardly to a vertical position when the caravan is collapsed. The end portions 7 may be connected to the roof by links instead of rollers and tracks.
Patent GB-298120-A (GB)
Title: Improvements in and relating to electric rectifier tubes
IPC: H01J17/06
Filed: 1927-06-29
Abstract: 298,120. Gehrts, A. June 29, 1927. Vacuum tubes; low-pressure metallic-vapour apparatus.-In discharge tubes for rectifying currents from some tenths of an ampere to 50 amps. or more and having a heated cathode and a filling of argon, nitrogen or other gas inert to the anode or mercury vapour at a pressure of from some hundredths of a mm. to 100 mms., the cathode consists of an alloy or mixture of molybdenum with one or more substances, such as thorium, uranium, titanium or their compounds increasing its electron emission as described in Specifications 230,492, 234,435 and 237,270. Zirconium, tantalum, tungsten, and other metals may be added to delay recrystallization of the molybdenum. Thoriated molybdenum may be used and requires no activation by heat treatment. The gas pressure and electrode spacing are chosen to give low-voltage drop in low-voltage rectifiers and to avoid breakdown between anodes. Specifications 216,160 and 255,983 also are referred to.
Patent GB-173751-A (GB)
IPC: B62D11/08
Abstract: 173,751. Compagnie des Forges et AciÚries de la Marine et d'HomÚ- court. Jan. 6, 1921, [Convention date]. Free - wheel gearing; differential driving and braking.-Comprises driving gearing for vehicles having road wheels and endless tracks, the road wheels being driven when required through free-wheel gearing in either direction, while the endless tracks can be driven through two independently - controlled epicyclic trains. The shaft 1 drives two gear-wheels 14 through bevel-gearing 2. Each gear-wheel is formed on one side with concentric rings of ratchet-teeth which can be engaged, one at a time, according to the direction of rotation, by corresponding teeth formed on sliding sleeves 15, 16 keyed on a shaft 13 from which the drive is transmitted to a road wheel through a clutch 18, a sprocket 17, and a driving- chain. The sleeves are controlled by a rod 19 having spring connections 21 to permit the sleeves to move slightly as one road wheel overruns the other when the vehicle is moving in a curved path. When the tracks are driven the ratchet sleeves are disengaged from each gear-wheel 14, which drives a planet-gear carrier 5 keyed on the sleeve 15, the planet pinions 6 engaging with an internallytoothed ring 4 held stationary by a brake 4b. The shaft 13 is thus driven and drives the corresponding track through the clutch 18, reducing gearing 3 and the track sprocket 10. To steer the vehicle one of the brakes 4b is released and the corresponding shaft 13 is braked at 11, the drive being transmitted through the other track only. The Specification, as open to inspection under Sect. 91 (3) (a), comprises also the application of the epicyclic gearing to a vehicle having endlesstracks only, and also two modified forms of epicyclic gearing for this purpose in which the planet carrier is the normally-braked member of the epicyclic train, the driving member being either the externally-toothed gear-wheel or the internally-toothed gear-ring. This subject-matter does not appear in the Specification as accepted.
Patent GB-1216307-A (GB)
Title: Electromagnet construction
Inventor: FITZPATRICK RONALD
IPC: F16K31/06
Filed: 1967-04-15
Abstract: 1,216,307. Electromagnets. DOWTY ELECTRICS Ltd. 1 April, 1968 [15 April, 1967], No. 17386/67. Heading H1P. An electromagnet comprises a coil winding embedded in a moulding which has a cylindrical passage extending through the coil between a pair of flat end faces and one or more ferromagnetic members included in the moulding adjacent to the outer periphery of the coil, each member extending between the flat faces of the moulding. The ferromagnetic members may be in the form of tubes through which clamping bolts extend. A coil 1 wound on a former 2 is assembled on a non-magnetic metal tube 6 between ferromagnetic end plates 8, 9 which are clamped together by four bolts 32 which extend through tubes 7 of ferromagnetic material. The coil is connected to insulated lead-out wires 16 and if it is to be used for A.C. operation rectifying diodes 15 may be suitably connected and located within an annular groove 5 provided in the flange 4 of the coil former 2. The assembly is then placed in a mould and embedded in epoxy resin. The encapsulated electromagnet is provided with a fixed pole core 12 and an armature 18 connected to a push rod 21 to form a force motor. A pair of such force motors are bolted to the opposite faces of the body 26 of an hydraulic spool valve, Fig. 1. In a modification, Fig. 3 (not shown), the end plates (8, 9) are not included in the moulded electromagnet which is provided with grooves to receive sealing rings against which the end plates bear when assembled. Also the pole core 12 is formed integrally with one of the end plates (8).
Patent GB-295112-A (GB)
Title: Improvements in coinfreed delivery mechanism
IPC: G07F11/68
Filed: 1927-06-30
Abstract: 295,112. Pearse, W., and Morris, E. E. June 30, 1927. Delivery of stamps, labels, and other articles cut from strips; coin action, thrust and multiple-coin. - In order to render a coin-freed postage stamp vending machine of the kind in which a band of stamps is fed forward for delivery by the rotation of a spiked drum, capable of delivering two alternative values of stamps without increasing the width of the machine, there is provided in a single machine two superposed delivery drums which are rotated in such directions as to issue stamps from a common aperture, The bands of stamps l<1>, l<2>, Fig. 3, are led over two superposed spiked delivery drums k<1>, k<2> which are rotated in opposite directions to deliver the stamps at a common aperture c, the stamps being retained by covers m<1> m<2>. Pronged stripping devices n<1> n<2> and serrated plates o<1>, o<2>, against which the perforated stamp is torn off, are provided. The drums are rotated, according to the coin inserted at an aperture b, Fig. 1, by links i', i<2> engaging respectively pins j on the drums, the links being connected to weighted levers d<1>, d<2>. The levers d<1>, d<2> are pivoted on a spindle e to which is keyed an arm f depending in the path of a coin thrust through the slot b, and two arms g<1> having pins h<1> each engaging one of the weighted levers. When a coin is inserted, it raises whichever weighted lever that happens to be depressed, and then after passing through a selecting or sorting shoot, it releases in known manner, according to its value, one or other of the drums k<1>, k<2> which rotates under the influence of the respective weighted lerver.
Patent GB-472862-A (GB)
Title: Improvements in cathode ray tubes for television or like systems
IPC: H01J31/40
Filed: 1936-06-23
Abstract: 472,862. Cathode-ray tubes. FARNSWORTH TELEVISION, Inc. June 23, 1936, No. 17421. Convention date, July 6, 1935. [Class 39 (i)] Pictures to be transmitted are projected on to the photo-electric side of a grid 5 coated with insulation on its other side and the grid is scanned by a cathode ray to develop signals at a collecting anode 12 behind the insulated side of the grid. The cathode ray is produced by a cathode 8 and anode 9 and may be modulated at radio frequency by a control electrode 91. Coatings 10, 16 on the envelope 1 form an electrostatic lens and a long magnetic coil surrounding the tube focuses the ray on to the grid 5. The electrodes 8, 9 do not substantially interfere with the projection of a picture past them through a window 2 on to the grid 5. Changes corresponding to picture brightness are formed on the insulating surface of the grid under the influence of photo-electrons from the continuous photo-electric surface of the grid and so control the number of electrons passing to the anode 12, an output resistance being connected between the anode 12 and an anode-lead shield 15 connected to the coating 10 and so to the grid 5. It is stated that electrons striking the grid 5 may or may not produce secondaries according to the velocity of the photo-electrons and of the electrons of the cathode ray. The grid 5 may be formed as described in Specification 472,861.
Patent GB-120962-A (GB)
Title: Improvements in Electric Cables.
IPC: H01B9/02
Filed: 1917-11-26
Abstract: 120,962. Henley's Telegraph Works Co., W. T., and Savage, H. Nov. 26, 1917. Drawings to Specification. Cables and compound conductors.-In electric cables having an outer sheath of electrically non- conductive waterproof substance such as bitumen or india-rubber, a thin strip or tape of conductive material is wound over the dielectric covering between this covering and the sheath, the contiguous edges of the strip or tape being in contact or overlapping. The strip or tape is permanently connected to earth, whereby the outer sheath is relieved from electric stresses. A textile tape or the like may be wound over the conductive strip to prevent the outer sheath from being cut or damaged. Reference has been directed by the Comptroller to Specifications 319/04, 1194/10, 3818/10, and 22355/12.
Patent GB-1473216-A (GB)
Title: Aerosol hydraulic drain opener
IPC: B08B9/032
Filed: 1974-04-22
Abstract: 1473216 Aerosol compositions for cleaning blocked pipes or drains UNILEVER Ltd 22 April 1974 [23 April 1973] 17479/74 Heading C4X [Also in Divisions F1 and F2] The following contents of aerosol containers are used in unblocking drains. (1) Propellant 12:-90%; d - Limoene:-10%. (2) Propellant 12:-75%; vinyl chloride:-15%; d - Limonene:-9%; linear alkyl benzene sulphonate:- 1%. (3) Propellant 12:-50%; aerothene TT (1,1,1 - trichloroethane):-50%. (4) Propellant 12:-70%; Propellant 11:-29%; miscellaneous minor additives:-1%. (5) Propellant 12:- 25%; nitrous oxide:-1À5%; Aerothene TT (1,1,1-trichloroethane):-73%.
Patent GB-810055-A (GB)
Title: Improvements in or relating to ladders
IPC: E06C1/10
Filed: 1956-06-07
Abstract: 810,055. Ladders. MATTHEWS, C. H. June 7, 1957 [June 7, 1956], No. 17560/56. Class 20(2) In a ladder formed of sections connected end to end the plugs 6 in one section which enter the socket 7 in the other have slots 8 adapted to engage a securing bolt 9 fixed in the other section.
Patent GB-1122487-A (GB)
Title: Improvements relating to clothes horses
IPC: D06F57/08
Filed: 1966-04-22
Abstract: 1,122,487. Clothes horses. J. D. CLEGG. 18 April, 1967 [22 April, 1966], No. 17648/ 66. Addition to 938396. Heading A4U. A clothes horse comprises plasticscovered bent metal, parallelogrammic end frames 11b 11c pivoted to a trapezoidal centre frame 11a, also of plastics-covered beat metal, by pivoting together extensions of clothes-supporting cross-bars of the frames, a U-shaped tubular support 29 maintaining the horse in position of use in which, in plan view, the end frames are at obtuse angles to the centre frame and all three frames are in planes inclined to the vertical and clothes on the cross-bars hang in spaced vertical planes. The support 29 forms sockets 30 each swivellably retaining one limb 32 of an angled rod 33, the other limb 34 of the rod 33 being swivellable in a sleeve 35 welded to a cross-bar 25 of an end frame and rotation of the end frames from a stored position against the centre frame automatically moves the support member angularly to a support position limited by a sleeved cord 41. In modifications the end frames are pivoted to the centre frame by clips or the rods 33 are replaced by the turned ends of a support member of metal rod.
Patent GB-946434-A (GB)
Title: Improvements in or relating to control knob assemblies
IPC: G05G1/12
Filed: 1960-05-19
Abstract: 946,434. Securing knobs on shafts. PHILIPS ELECTRICAL INDUSTRIES Ltd. May 19, 1960 [May 22, 1959], No. 17699/60. Heading F2U. A moulded control knob 3 is secured on a shaft 1 by a U-shaped wire spring clip 5 which engages axial grooves 11, 13 in the knob, and has one end 17 bent inwardly to pass through a diametral bore 19 in the shaft whilst the other end 21 is bent outwardly to engage a radial hole 23 in the knob. The end 17 of the clip is bowed to press the shaft against the bore in the knob and to prevent backlash. Part 25 of the clip 5 is flattened so that it wedges between the shaft 1 and the groove 13. The shaft may be provided with a flat and the knob with a corresponding bore.