baber/WOPTO huggingface dataset:
Patent GB-1311808-A (GB)
Title: Lightweighting of blanks such as mirrors
IPC: G02B7/182
Filed: 1970-06-22
Abstract: 1311808 Grinding OWENS-ILLINOIS Inc 22 June 1970 [23 June 1969] 30103/70 Heading B3D [Also in Division F2] A method of light-weighting a blank such as an optical mirror or the like, comprises forming a plurality of bores extending from the back surface of the blank into the blank to predetermined depths along parallel centre lines arranged in a regularly spaced pattern on the back surface, and enlarging the diameter of each of the bores to form a cavity extending from the bottom of each bore to a predetermined axial distance inwardly from the back surface to form a web in the mirror blank between two adjacent bores having a relatively uniform cross-section. The bores 14, Fig. 6, are initially formed in the back surface 16 of the blank by a core drill 12, the cores then being broken off by tapping with a hammer. The bores are then enlarged into circular cavities by a grinding wheel 20, Fig. 8, driven by an air motor 21, and are finally formed so as to have hexagonal cross-sections separated by webs 25, Fig. 11, by a tool driven by an air motor 24. The apparatus for forming the cavities from the bores 14 consists of a frame 28, Fig. 1, having guide rods 30 along which a carriage 32 is reciprocatable between limits, determined by engagement of a stop 80 with limit switches 82, 84, by an electric or hydraulic motor 35 having a rod 36 connected to the carriage. An extension of the shaft 36 is journalled in bearings 38, 40 and has a worm-wheel 42 engaged by a worm 44 drivable by a stepping motor 46. A bracket 48, Fig. 4, is secured to the lower end of the extension of shaft 36 and is formed with a guideway for a slide 50 which is urged towards an adjustable stop 54 by a spring 52 or fluid motor and carries a holder 26 for a shaft 62 which carries either the motor 21 and grinding wheel 20, Fig. 8, used for producing the enlarged circular cavities or the motor 24 and tool 66 for producing the hexagonal cavities. A follower 58 is carried by the slide 50 for engagement with a hexagonally-shaped cam 60 secured to the frame. In operation, after the bores have been drilled by the core drill 12, Fig. 6, and the cores removed by tapping with a hammer, the tool 20, Fig. 8, and motor 21 are fitted to shaft 62. The carriage is displaced to enter the wheel within the bore and the stop 54 adjusted so that the wheel engages the wall of the bore. The wheel is then moved down the wall until the stop engages switch 82 which actuates a control 78 to reverse the direction of motor 34 and steps motor 46 so that the return cut is adjacent the initial cut. The process is repeated for 360 degrees and then, if required, the stop 54 is readjusted to permit the circular cavity to be enlarged further. Thereafter, the motor 21 and wheel 20 are replaced by the motor 62 and wheel 66 and the cavity is ground to the hexagonal shape under the control of the cam 60 and follower 58.
Patent GB-299016-A (GB)
Title: Improvements in or relating to direction finding aerials for use on aircraft
IPC: G01S1/02
Filed: 1928-10-18
Abstract: 299,016. Telefunken Ges. fur Drahtlose Telegraphic. Oct. 19, 1927, [Convention date]. Aerials.-Directional frame aerials used on aircraft are provided with a protective casing having a stream-lined profile to reduce area dynamic losses.
Patent GB-484493-A (GB)
Title: Improvements in electrical remote control systems and electromagnetic devices for use therein
IPC: H02J13/00
Filed: 1936-11-05
Abstract: 484,493. Actuation of switches. AUTOMATIC TELEPHONE & ELECTRIC CO., Ltd., and MACKENZIE, J. F. Nov. 5, 1936, No. 30201. [Class 38 (v)] [Also in Group XXXVIII] Switching apparatus adapted to be controlled by H.F. impulses transmitted over a power network comprises a relay 10 which is responsive to incoming impulses and pulls up relay 11 to switch in a motor 12, and clutch a wheel 13 driven by the motor to a wheel 15 which is rotated against spring control. The wheel 15 carries a detent 17 which during rotation of the wheel rides over the periphery of a cam 19. Upon cessation of a signal of current duration the detent 17 drops into a notch in the cam 19 and upon restoration of the wheel 15 and the cam 19 to normal an associated cam 20 is rotated to effect operation of the switch contacts 21. The cam 19 is provided with several notches to adapt the apparatus to signals of different durations. The detent 17 co-operates with a double-armed friction plate 22 which ensures positive operation of the detent and also prevents it entering notches in the cam during a return movement. The cam 19 may be masked by a plate 24 to prevent operation by incorrect signals. The unit is mounted on a plate 26 provided with contact pins 27. In a modification the control is effected by a synchronous motor which when disconnected from the mains upon cessation of an impulse is rotated in the reverse direction. Specification 431,349 is referred to.
Patent GB-957916-A (GB)
Title: Method and apparatus for determining the value of an angle from two electrical signals representing the sine and cosine thereof
IPC: G01D5/38
Filed: 1961-08-22
Abstract: 957,916. Photo-electric measuring. A. H. McILRAITH. Sept.20, 1962 [Aug.22, 1961], No. 30287/61. Heading G1A. [Also in Division G4] The value of an angle pt is determined from signals representing respectively sin pt and cos pt by adding them to auxiliary signals sin wt and cos #t spaced 90 degrees in phase and of substantially greater frequency to produce signals representing (sin #t + sin pt) and (cos #t + cos pt) which are multiplied to produce a signal representing ¢ sin 2 pt + sin (#t + pt) + ¢ sin 2 wt from which signal sin (#t + pt) is filtered and phase compared with reference signal sin #t to produce a signal representing pt. In apparatus measuring the relative displacement of a diffraction grating 12 and a crossed index grating 14 having adjacent similar sections 16, 17, 18, 19 in which the lines of the last three sections are displaced 90 degrees in respect to those of the preceding section, the gratings are illuminated and emergent light is received by four photocells 20, 21, 22, 23 corresponding to the sections of the index grating, which are coupled in pairs 180 degrees out of phase to minimise the net dark output. The outputs of pairs 20-22 and 21-23 are in quadrative and represent sin 9 and cos # where # is the fraction in radians far interference fringe to be determined. The signals are added in matched networks 24, 28 to auxiliary signals sin #t and cos wt from oscillator 26 and the resultant signals are multiplied in a fast linear transistorized network 30 of the kind described in Specification 929,064. A filter 32 extracts the component sin (#t + #) which is phase compared with a reference signal sin #t in network 32 to give a signal representing #. The device may respond to a signal sin (wt + #) from a pair of diffraction gratings indicating the position of a machine tool and a command signal # from a magnetic tape, and a phase comparater produces a signal representing (# - # ) controlling a servo mechanism driving the tool carriage until # = # and (# - #) = 0.
Patent GB-410685-A (GB)
Title: Improvements in or relating to high pressure feed water preheaters particularly for locomotives
IPC: F22D1/42
Filed: 1933-11-01
Abstract: 410,685. Heating feedwater. SCHWEIZERISCHE LOKOMOTIV-UND MASCHINENFABRIK, Winterthur, Switzerland. Nov. 1, 1933, No. 30325. Convention date, Nov. 5, 1932. [Class 64 (i).] In a high pressure feedwater heater for locomotives in which the preheating elements e are inserted in the smoke tubes d of a low pressure feedwater heater A and have a lower cold water header a and an upper hot water header b, and in which the elements e situated iri a common vertical plane are combined in two groups p, q which are connected parallel with each other and parallel with the planes of adjacent groups, the connecting pipes o<1> of the lower element groups q to the lower cold water header a and the connecting pipes o of the upper element groups p to the upper hot water header b are situated in the same vertical plane as the respective element groups. The connecting pipes t of the upper element groups p to the lower cold water header a and the pipes t<1> connecting the lower element group q to the upper header b are situated in planes extending between the element group planes. Each element e has several pipe lengths connected in series so that water flows through them consecutively from below upwards. Thus six pipe lengths may be arranged one centrally and five spaced around in pentagonal form.
Patent GB-261196-A (GB)
Title: Method of and apparatus for automatically controlling the temperature of steam and for heating water or any other liquid
IPC: F22G5/20
Filed: 1925-12-01
Abstract: 261,196. British Area Regulators, Ltd., and Lindsay, T. Dec. 1, 1925. Controlling and moderating superheat.-The temperature .of superheated steam is controlled by dividing the Steam into two controlled portions, passing one through an indirectly heated water or other liquid heater, and mixing the cooled steam with the other portion, the temperature of the mixed steam actuating a thermostatic device which controls the valve which regulates the volume of the two divided portions of steam. The water heater comprises a cylinder 1 having inlet and outlet 7, 8 for the water and provided with. heating tubes 2. The steam inlet valve 11 controls the proportions of steam passing through the heater 1, and direct through pipe 15 to the outlet 17. The valve 11 is actuated by a quadrant 28, chain 25, and pressure cylinder 22, the latter being controlled bv a thermostat 18 through a relay. 'The thermostat and relay are as described in Specification 206,154, [Class 64 (ii), Heating systems &c.]. If the amount of steam passing through the water heater is small, it may tend to be condensed wholly, and an additional thermostatic relay may be inserted in the conduit 16 to control the water supply to the heater. If the amount of steam passing through the water heater be sufficiently large to raise the water to boiling point, the water supply will be automatically increased by the second thermostat. Specification 116,074*, [Class 135, Valves &c.], also is referred to.
Patent GB-1398826-A (GB)
Title: Unshroulded internally-cooled turbine rotor blades
IPC: F01D5/18
Filed: 1973-06-26
Abstract: 1398826 Turbine rotor blades-cooling MOTOREN-UND TURBINEN-UNION MUNCHEN GmbH 26 June 1973 [27 June 1972] 30433/73 Heading FIT An unshrouded turbine rotor blade is formed with at least one duct for the flow of coolant fluid, the flow duct discharging into a recess formed at the blade tip which constitutes a rubbing blade tip, the blade tip being so formed that the coolant fluid is discharged with a reactive driving effect. The blade shown is formed with coolant fluid ducts 10 which open into a recess 13 formed at the blade tip, the recess being defined by a wall 11  the edge 12 of which is disposed adjacent the inner surface 15 of the stator casing 16. An opening 20 is formed in the wall 11 on the concave surface of the blade through which the coolant fluid discharges so exerting a reactive turning effect. In a second embodiment the wall of the  recess at the concave side of the blade tip is removed and the wall at the convex side is bent over the recess so that the coolant fluid discharging from the blade tip is guided by the wall. The blade tip rotates within an annular groove formed in the inner surface of the stator casing.
Patent GB-1134407-A (GB)
Title: Improvements in or relating to cold cathode glow discharge devices
Inventor: MASKELL CLIFFORD WILLIAM ALFRE
IPC: H01J37/077
Filed: 1965-07-16
Abstract: 1,134,407. Electron beam apparatus. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. 12 July, 1966 [16 July, 1965] No. 30440/65. Heading H1D. A cold cathode glow discharge device ineludes a hollow cathode, one end of which has a circular cross-section, a further hollow electrode also having a circular end cross-section, the two circular ends being arranged adjacent and in face-to-face relationship, and a surrounding anode which may form part of the envelope of the device: in operation, such potentials are applied to the anode, and to the cathode and the further electrode, as to produce streams of electrons which converge on the axis of the gap between the two circular electrode ends. Hemispherical electrode portions 17, 18 of stainless steel wire mesh or tantalum plate are supported by means of plates 22, 23 and conductive rods 24 to define a gap 19, the further electrode portions 20, 21, 25, 26 and 27 all being of steel mesh. As shown, the whole electrode assembly is held at cathode potential, the aluminium end plates 2, 3 constituting the anode, and a filling of helium at a pressure of 4 x 10<SP>-2</SP> torr being maintained by adjustment of valve 15 and pump 11. In modified arrangements of the central electrode assembly, the portions 25, 26 and 27 may be omitted; the rods 24 may be insulators to permit the application of different potentials to the two hemispheres, whereby the streams of electrons converging on the axis of the gap 19 are defocused to produce a more diffuse heating of material positioned at the axis; and the hemispheres may be replaced by extensions of the cylindrical portions 20 and 21 (Fig. 3, not shown). The device may be employed for heat treatment, welding, melting, or zone refinement of refractory material e.g. a rod for zone refinement may be moved longitudinally down through the electrode assembly by means of a holder operable from outside the envelope. The device may also be employed as a cathode heater in an electron beam apparatus.
Patent GB-1465094-A (GB)
Title: Dynamic loudspeaker for speech transmission
IPC: H04R9/10
Filed: 1974-07-09
Abstract: 1465094 Loud-speakers H PEIKER 9 July 1974 [19 July 1973] 30457/74 Heading H4J In a dynamic loud-speaker substantially limited to the speech frequency range only, connections 7 are provided between the ends 6 of the voice coil and flexible connecting leads 5 (e.g. stranded or fine spiral leads) and these connections 7 are attached to the diaphragm 3. The loud-speaker enclosure 8 to the rear of the diaphragm 3 is connected to the outside air through apertures 14 in a wall 9 of the enclosure 8. These apertures 14 are of such a size and number that the cut-off frequency of the low pass filter formed by the rear enclosure 8 and the apertures 14 lies immediately below the speech frequency range. The arrangement makes unlikely breakage of the voice coil wire in the vicinity of the connection after prolonged use. The leads 5 connect to soldering lugs 4 on the chassis 2. Lacquer seals a hole in the diaphragm 3 at the connections 7. The enclosure 8 is cylindrical and the apertures 14 are in a circular array arranged symmetrically with respect to the diaphragm 3. The front end of the enclosure 8 has a screw cap 11 having apertures (not shown) for emission of sound. The magnet system 1 is mounted between two strip-shaped projections 12.
Patent GB-477442-A (GB)
Title: Improvements in and relating to the manufacture of piston ring pot castings
IPC: B22D13/04
Filed: 1936-03-24
Abstract: 477,442. Casting piston ring pots. OUBRIDGE, W. A. March 24, 1936, No. 30503/37. Divided out of 477,323. [Class 83 (i)] [Also in Group XXVI] A piston-ring pot casting is composed of an outer layer of cast iron or other good bearing metal or alloy and an inner layer of steel or other metal or alloy of similar tensile strength and toughness, the pot being produced by centrifugal casting.
Patent GB-844178-A (GB)
Title: Metal finishing means and method for use of same
IPC: B23B5/12
Filed: 1957-09-30
Abstract: 844,178. Broaching; drawing. SALLE STEEL CO. Sept. 30, 1957 [Oct. 11, 1956], No. 30512/57. Classes 83 (3) and 83 (4). A method of finishing a metal bar or rod, particularly of round, oval or square section, consists in passing it through two axially-spaced dies separated by a confined space 14 containing a fluid. The first die 10 is a sintered carbide or h.s.s. cutting-die, having a rake angle of 10 to 40 degrees and a clearance angle of 1 to 15 degrees behind a flat land 30. Fluid, such as a phosphated fluid for lubricating and cooling, is supplied to the space 14 under a pressure up to 10,000 1bs./sq. inch, as by a hand pump. The cut may be up to 0.02 inch at up to 1000 ft./min. The second die 12 is a drawing die having a reduction draft up to 0.06 inch.
Patent GB-1461899-A (GB)
Title: Disazo pigments and a process for their manufacture
IPC: C08L27/00
Filed: 1975-07-22
Abstract: 1461899 Disazo pigments based on anthraquinones or xanthones CIBA-GEIGY AG 22 July 1975 [23 July 1974] 30534/75 Heading C4P Novel yellow to red disazo pigments of the formula wherein R 1  is H, C 1-4  alkyl, phenyl-(C 1-4  alkyl) or optionally substituted aryl; R 2  is H, C 1-4  alkyl, CN, CONH 2  or C 2-4  alkanoylamino; R 3  is C 1-4  alkyl, C 2-6  alkoxycarbonyl or phenyl optionally halo-, or C 1-4  alkyl or alkoxysubstituted; Z is O or Z and R 1  together complete an optionally substituted benzimidazole ring; X, Y, X 2  and Y 2  are each H, halogen, CH 3  or NO 2 ; and V is O or CO, are prepared by coupling tetrazo compounds of diamines of the formula with pyridones of the formula They are used to pigment high M.W. organic material in the form of plastic compositions or melts, spinning solutions, lacquers or paints. Reference is made to a blue disazo pigment prepared from starting materials falling within the above formulae described in Specification 1,285,339.
Patent GB-159964-A (GB)
Title: Improvements in incandescent burners
IPC: F23D14/30
Filed: 1919-12-06
Abstract: 159,964. Osbaldiston, J. Dec. 6, 1919. Incandescent gas burners.-In incandescent gas burners, more particularly of the inverted type, a hit-and-miss air regulator B is arranged with slots B<1> of elongated inverted V-shape extending from the air apertures b' to the bottom of the regulator to allow expansion of the mixing- tube A when this becomes hot, while the upper edge b of the regulator B to which the cover or canopy C is attached is of flared or bell-mouthed shape. A preheating-chamber E with an internal ledge e is also provided above the mantle-carrier D.
Patent GB-1403104-A (GB)
Title: Wound splints
IPC: A61B17/04
Filed: 1972-06-30
Abstract: 1403104 Wound splints H H LEVEEN 30 June 1972 30847/72 Heading A5R A bar like wound splint is made of plastics material and has a downwardly converging groove 11 formed longitudinally on one surface for receiving and gripping a suture 19. The splint may be a bar 10 of semicircular or rectangular section or in the form a bridge having a pad 21 at each end for contacting the skin, a hinge section 20' in the centre of the bridge and'or at each of the pads, the downwardly converging groove being formed along the upper edge of the bridge for receiving the suture and slots 23 at the outer edge of each pad to allow passage of the suture past the pad.
Patent GB-1429825-A (GB)
Title: One-way couplings
IPC: F16D41/07
Filed: 1973-06-28
Abstract: 1429825 One-way brakes SOC ANON FRANCAISE DU FERODO 28 June 1973 [30 June 1972] 30855/73 Heading F2E A one-way brake comprises a circular series of jamming members adapted to be interposed between outer and inner bearing surfaces, a synchronizing cage in which the jamming members are held, a track provided with ramps co-operable with the jamming members and comprising one of the bearing surfaces, two lateral closure rings axially enclosing the jamming members, coupling means interconnecting the closure rings and fixing the rings angularly with respect to the track comprising at least one pin arranged parallel to the axis of the coupling and having bent-over ends adapted to retain the closure rings axially, and means subjecting the synchronizing cage to an elastic restoring action. Fig. 1 shows the application of the brake 16 to a hydrokinetic torque converter. As shown in Figs. 2, 3, 5, rollers 17, in contact with the cylindrical fixed support 15, are each located between two transverse members of a synchronization cage 18 and co-operate also with an outer track 19 of hard steel which has as many jamming ramps 20 as there are rollers 17. Located outside the cage 18 are rings 23, 24, Fig. 5, each fitting into the outer track 19 by a flange 36 or 37. The rings are secured together by at least one pin 25 located in a groove 27 in the outer track 19 and in slots 28, 29, in rings 23, 24 respectively; one bent-back end 31 of the pin is engaged in a hole 34 in ring 23, while the other bent-back end 33 rests on the outer periphery 35 of ring 24 so the central part 26 of pin 25 is in torsion. Preferably two diametrically-opposite pins 25 are provided. The cage 18 is resiliently secured with limited circumferential play by two springs 22, each nearly a complete circle, and located just within one side of the cage. One end, 41, Fig. 3, of each spring lies above the edge of cage 18 and is located in a hole 43 in ring 23 or 24 (and is thus circumferentially fixed), while the other end, 40, is located in a hole 42 in the cage 18, Figs. 2, 3. These springs ensure the jamming of the rollers against ramps 20 when reactor wheel 12 tends to rotate oppositely to impeller and turbine wheels 10 and 11, and vice versa. The rollers may be replaced by sprags.
Patent GB-337177-A (GB)
Title: Improvements in means for facilitating the starting of internal combustion engines
IPC: F01L13/00
Filed: 1929-10-12
Abstract: 337,177. Gardner & Sons, Ltd., L., Gardner, J., and Gardner, J. H. S. Oct. 12, 1929. Stroke, varying; regulating delivery.- In fuel injector mechanism for an internal - combustion engine a link b connecting a governor with a fuel pump delivery - regulating member is provided with a manually operated latch a to allow the regulator to move, at starting, in a direction to increase the quantity of fuel delivery beyond that normally permitted at full load when working under governor control. The latch a automatically falls into position to engage a stop d which limits the travel of the link b, and hence the quantity of fuel injected at full load, after the governor has moved the member in a direction to decrease the fuel delivery.
Patent GB-405765-A (GB)
Title: Improvements relating to the arrangement of flax straws to facilitate treatment in preparation for spinning
IPC: D01B1/10
Filed: 1932-11-04
Abstract: 405,765. Handling flax for treatment to obtain fibres. LINEN INDUSTRY RESEARCH ASSOCIATION, and SEARLE, G. O., Research Institute, Lambeg, Co. Antrim, Northern Ireland. Nov. 4, 1932, No. 31091. [Class 120 (iii).] To facilitate their handling and subsequent treatment, flax straws a are arranged in the form of a thin layer or mat when in a straightened, levelled or parallelised condition, and held in such condition by one or more rows of stitching b, at any time between when the straw is standing in the field and before setting, e.g. whilst standing in the ground immediately prior to harvesting. Preferably the flax is passed through a deseeding machine and then over a reciprocating table, the levelled and parallelised straws then being stitched across in a sewing machine.