baber/WOPTO huggingface dataset:
Patent GB-1506502-A (GB)
Title: Acoustic wave oscillators
IPC: H03B5/32
Filed: 1975-04-10
Abstract: 1506502 Acoustic wave oscillators NATIONAL RESEARCH DEVELOPMENT CORP 6 April 1976 [10 April 1975] 14862/75 Headings H3U and H3T An acoustic wave oscillator constituted by an amplifier 4, Fig. 1, in the feedback loop 3 of an acoustic wave delay line 8, comprises an input transducer 6, a plurality of output transducers 7a-7d, the respective output signals from which are of different phase, and switching means which allow the successive connection of the output transducers to the amplifier 4 so that the frequency of the oscillator may be changed by preset amounts. As shown in Fig. 1, in a device employing surface waves, phase differences between adjacent output transducers of #/2 are introduced by staggering the transducers along the delay line, and the switching means is constituted by a rotary switch 2 which comprises a wiper 9 and four equal resistors connected between the transducer outputs. One complete revolution of the wiper 9 in an anticlockwise direction lowers the frequency of oscillation from one mode to the next; clockwise rotation increases the frequency of oscillation. The transducers 7a-7d may have different apertures, they may be arranged on both sides of transducer 6, they may be dispersive, and their fingers may be weighted. In a further modification, transducers 7c, 7d are aligned with transducers 7a, 7b and the outputs from 7c, 7d are taken from the lower electrodes instead of the upper ones as shown. In alternative embodiments the switching means may be constituted by PIN diodes or other solid state electrically controlled switches. In the embodiment of Fig. 3, output transducers 19, 20 are staggered by #/4 and are alternately connected to amplifier 16 by PIN diodes 22-25 under the control of two pole four way switch 27. The arrangement is such that electrodes 19a, 19b are alternately connected to earth so that the two transducers 19, 20 perform the same function as the four transducers in the embodiment of Fig. 1. In the modification of Fig. 4 (not shown) three output transducers are staggered by #/3 and are connected to the amplifier (29) by PIN diodes controlled by a three way make before break switch (42). In a bulk wave delay line, Fig. 5, a phase shift of 90 degrees between the outputs from transducers 50, 51 is produced by a length of electromagnetic delay cable, or by tuning inductances. As with the embodiment of Fig. 3, the frequency of oscillation is changed in phase steps of 90 degrees by alternately reversing the earth and live electrodes 57-60. Methods are described of determining the frequency of oscillation of the device. One method involves the provision of an oscillator having strong mode selection (see, e.g. Specification 1,451,326) with a delay line on the same substrate. Another method involves the incorporation of a frequency discriminator, e.g. as described in Specification 1,483,735. In a further method the oscillator is wound to its highest or lowest frequency and subsequent changes are referred thereto.
Patent GB-593179-A (GB)
Title: Improved method of closing cavities
IPC: B23P11/00
Filed: 1945-06-12
Abstract: 593,179. Assembling force fits. SMITH, F. E., ANSELL, W. R., and PEARCE, E. R. S. June 12, 1945, No. 14938. [Class 83 (iv)] [Also in Group XXV] A method of securing closure or other component in a circular orifice comprises positioning over the orifice a ring or washer having an overall diameter greater than that of the orifice and pressing by means of a punch so that the material of the ring is rotated about its neutral axis and at the same time is forced into the orifice with an interference fit. A steel ring 3 of square cross-section with its sides at an angle of forty-five degrees to the longitudinal axis is placed on top of a cylindrical cavity 2 of less diameter in a member 1. The action of a punch 4 is to rotate the metal of the ring about the neutral axis and also force the ring into the cavity where it remains as an interference fit and serves to retain a closure disc previously placed in the cavity. The invention is also shown applied to the closing of the near end of a tracer cavity 6 in a member 7 adapted to be screwed into the base of an armour-piercing projectile. The mouth of the cavity is formed with a shoulder 9 against which bears a choke washer 8. A brass cup-shaped sealing member 10 is then pressed firmly against the walls of the orifice by a ring or washer 3 forced into the opening in the manner already described. The washer 8 may be omitted, in which case the sealing cup would bear on the shoulder 9. The ratio of the overall diameter of the ring to the diameter of the orifice to be closed is approximately 1.077 and the length of a side of the washer is approximately one-eighth of the diameter of the orifice.
Patent GB-1429538-A (GB)
Title: Installations for waste conveyance
IPC: B04C5/14
Filed: 1973-03-28
Abstract: 1429538 Separating waste from conveying air SVENSKA FLAKTFABRIKEN AB 28 March 1973 [10 April 1972] 14959/73 Heading BIT Waste material is separated from conveying air which is drawn through coarse separator 2 and fine separator 3 in series by fan 11, separator 3 incorporating a water bath which retains the fine waste, which is returned as a slurry to separator 2 via line 7, 9. The slurry is first drained into section 7 of the line, then valve 6 is opened, and valve 8 allows the suction in separator 2 to draw a body of slurry followed by atmospheric air through line 9. The valves may be controlled by a timer or slurry level detector. Separator 2 is emptied via opening 2d.
Patent GB-455659-A (GB)
Title: Improvements in the driving of supercharging blowers
IPC: F02B33/00
Filed: 1935-05-22
Abstract: 455,659. Friction clutches; engine superchargers. HALL, G. L. B., Brockley, Maple Drive, Alvaston, Derby. May 22, 1935, No. 14970. [Class 80 (ii)] [See also Group XXVII] A centrifugal clutch between a gear wheel D, meshing with a gear D<1> on the shaft of a supercharger D<4>, and a lay shaft B<1> geared to an engine shaft comprises two sets of shoes H<1>, H<2> co-operating with wedge-shaped grooves in the gear D and having riveted pins J engaging slots J<1> in flanged members F<1>, F<3> secured on the shaft B<1>, the slots J<1> being inclined away from the direction of rotation so as to cause an outward thrust on the shoes in addition to that caused by centrifugal force. The outward movement of the shoes is limited by projections K on the shoes extending into apertures K<1> in the members F<1>, F<3>. Spring rings H<5> also urge the shoes outwardly. According to the Provisional Specification, the shoes may be guided on arms on the driving member, the arms being inclined away from the direction of rotation.
Patent GB-748539-A (GB)
Title: Improvements in or relating to time interval measuring apparatus
IPC: G04F10/06
Filed: 1952-06-13
Abstract: 748,539. Radio navigation. SPERRY CORPORATION. June 13, 1952 [June 14, 1951], No. 14977/52. Class 40 (7). In a Loran receiving system, a precise measure of the time delay between the master and slave signal pulses is provided by indicating the phase difference between two reference R.F. signals which are adjusted to correspond respectively to the master and slave pulses. The received master and slave pulses each control the opening of a separate gate circuit which permits the application of a reference signal to a common phase detector with the corresponding received master or slave signal. In one embodiment the output of the phase detector is gated to produce two separate signals, viz. those derived from the phase comparison between the master and the corresponding reference signals and those derived from the phase comparison between the slave and the corresponding reference signals. Each phase detector output signal controls a separate phase shifter, both of which are supplied from a common source and which produce the reference signals. In a second embodiment, the output of the phase detector is taken directly to a CRT and the frequency of the reference signals is adjusted manually. In the first embodiment, Fig. 1, the phase detector 18 is supplied simultaneously with received master and slave pulse signals and reference signals, and the resultant output, which corresponds to the phase difference between the received and reference signals, is used to adjust the phase of the latter. The received master signals control the gate 26 to permit the corresponding reference signal, from phase shifter 22, to reach 18 at a fixed phase with respect to the master signal. The resultant signal causes motor 24 to adjust 22 to maintain the fixed phase difference relationship. The second reference signal produced at phase shifter 22<SP>1</SP> is similarly maintained at a fixed phase with respect to the slave pulse and is applied to 18 with the slave pulses. The phase difference between the two trains of reference pulses, which is the same as the phase relationship between the master and slave pulses, is indicated at 40. To reduce sky-wave interference, 18 is connected to 24 and 24<SP>1</SP> for short intervals by the pulse coincidence circuits 30, 30<SP>1</SP>. In a modification, signal 3 (not shown), the output of the phase detector is gated by a relay controlled from the master pulses. In the second embodiment, Fig. 2, the adjustment of the frequency and phase of the reference signals at 42 and 44 is effected manually and the magnitude of the displacement between the received and reference signals is observed at CRT 46. Specification 509,139 is referred to.
Patent GB-112116-A (GB)
Title: Improvements in Continuous Current Dynamos.
Inventor: KESSELRING FRITZ
IPC: H02K23/36
Filed: 1916-06-08
Abstract: 112,116. Kesselring, F. June 8, 1916. Exciting.-The main armature winding A of a variable-speed constant-voltage dynamo is arranged to cut two magnetic fluxes, one of which #1 is approximately constant while the second #2 is proportional to the number of revolutions and is produced by an auxiliary armature winding B which cuts the main flux #1 only. The flux #1 is produced by windings E<1> connected across the terminals of the battery B<1>, or it may be furnished by permanent magnets. The flux #2 is produced by windings E<2> connected across the brushes K<3>, K<4> of the auxiliary winding. Fig. 7 shows a modified field-magnet structure and disposition of the field coils; the windings E<2> are connected in series with the brushes K<3>, K<4> across the battery terminals. A positive or negative additional number of ampere-turns proportional to the number of revolutions may be added to the main magnetic circuit; windings carrying the dynamo or battery current may be placed on the main or auxiliary poles. An iron resistance may be placed in series with the main exciting coils. Iron or other resistances may be placed in the load circuit.
Patent GB-1339343-A (GB)
Title: Method of shaping objects of brittle foam material
IPC: C04B38/06
Filed: 1971-05-14
Abstract: 1339343 Embossing CENTRAL INSTI. TUTE FOR INDUSTRIAL RESEARCH 14 May 1971 [15 May 1970] 14982/71 Heading B6J [Also in Division C1] Building blocks or other brittle elements of foamed clay, glass powder or slag or similar ceramic foam are crushed locally by forcing a tool a controlled distance into the material at a pressure greater than the compression strength of the material. The elements may be given a surface pattern or finish by this means or deep grooves may be formed in the material to enable it to be parted into smaller portions. Preferably the local areas crushed do not exceed 5% of the total surface being operated upon. Crushing may be performed by, e.g. hammer tools having a controlled stroke, or by rolls (which may be spiked or corrugated), discs, tubes or rods.
Patent GB-612201-A (GB)
Title: Improvements in and relating to apparatus for sinking and raising spuds or piles from pontoons used in drilling wells in oil fields located below lakes and other expanses of water
IPC: E02B17/02
Filed: 1946-05-17
Abstract: 612,201. Drilling wells. MACTAGGART, SCOTT, & CO., Ltd., and PRENTER, R. G. May 17, 1946, No. 15023. [Class 85] [Also in Group XXXIII] In drilling wells in subaqueous oil-fields by the use of pontoons anchored by means of spuds forced into the sea &c. bed, hydraulic rams c are provided on opposite sides of each of the spuds b and co-operate with spaced pairs of lugs &c. h on the spuds for raising or lowering the latter step-by-step. The rams may engage the .lugs by means of crossheads i which may be rotated to disengage the lugs. The rams may be double-acting, or a pair of oppositely acting rams may be provided on each side of the spud.
Patent GB-630637-A (GB)
Title: Improvements in or relating to photographic cameras
IPC: G03B3/00
Filed: 1947-06-06
Abstract: 630,637. Photographic cameras. KODAK, Ltd. June 6, 1947, No. 15048. Convention date, June 6, 1946. Drawings to Specification. [Class 98 (i)] The light-sensitive material is carried on a frame movable along the optical axis of the camera lens for focusing and bearing a focusing scale viewed through an aperture in the camera body, the latter carrying an index for the scale and a focusing knob for moving the frame. The camera is designed for interchangeable lenses. The embodiment described is identical with that described with reference to Figs. 1-9 of Specification 630,636, but in addition, the central rangefinder prism system and a latch locking the frame in focused position are described. The hinged camera bed may be locked in a low position to accommodate lenses of short focal lengths.
Patent GB-145253-A (GB)
Title: Improvements in non-refillable bottles
IPC: B65D49/04
Filed: 1919-06-16
Abstract: 145,253. Morrow, J. F. June 16, 1919. Bottles, non-refillable.-Relates to non- fillable 'bottles of the kind comprising a ball valve normally seated within an internallytapered neck portion of the bottle and adapted to be retained by a perforated member within the neck portion when the bottle is inverted or tilted. The bottle is provided with a neck having a tapered interior 10, a ball 15 to seat in the lower end 11 of the neck, and a plug 16 with a conical extension 20, cupped at its lower end, and having perforations 19 from the upper to the underside and terminating at the lower end within the perimeter of the extension. The plug may be locked in position in the bottle neck by means of a rubber ring 13 carried in a grove 17 in the plug and engaging a groove 12 in the bottle neck. The perforations 19 may be vertical with their lower ends curved inwards towards the centre; or they may be inclined.
Patent GB-131486-A (GB)
Title: Improvements in Machines for Making Bolts, Screws and the like.
Inventor: FAIRWEATHER HAROLD GEORGE CRUI
IPC: B21K1/44
Filed: 1918-09-17
Abstract: 131,486. Fairweather, H. G. C., (Galvo Maskinfabriks Aktiebolag). Sept. 17, 1918. Forging bolts.-A machine for forming heads on screws, bolts, &c. by the successive action of three punches which are carried in a vertically reciprocating slide mounted on a horizontal slide, is constructed with means for holding the central punch in working position, as the vertical slide descends after the actuation by the upper punch, consisting of a horizontally moving lever carried by the horizontal slide and controlled by a fixed cam surface which allows the lever to engage a bolt on the vertical slide at the correct time. The horizontal slide 32 is actuated by an adjustable connecting-rod 35 connected to the slide by a ball and socket joint. The wire &c. to be operated on is cut and fed in known manner to a die 16 fitted with a counter die 17, and the punches 20, 19, 18, for acting on the wire are carried by a vertically reciprocating slide 31 which is guided to move in the slide 32, being raised and lowered by bell-crank lever and cam mechanism comprising a cam 36, levers 38, 44, 45. The shaft 11 of cam 38 is driven from the crank-shaft which reciprocates the slide 32 and at a third of the speed. The upward movement of the slide 31 is limited bv nuts 61 acting on an arm 60 on the slide 31, and the downward movement is similarly controlled. The mid position is determined by a spring-controlled lever 51 which swings under the arm 60 when permitted by a fixed guiding-surface, and it holds up the slide 31 in the mid position by engaging a screw stop 62 which permits of a small amount of adjustment.
Patent GB-969200-A (GB)
Title: Transfer of hot bodies from furnaces
Inventor: FERGUSON HUGH CRAWFORD
IPC: F27D3/12
Filed: 1960-04-29
Abstract: 969,200. Discharging furnaces. DAVY & UNITED ENGINEERING CO. Ltd. April 27, 1961 [April 29, 1960], No. 15124/60. Heading F4B. [Also in Division B8] Apparatus for transferring stainless steel billets 1 with protective wrappers 2 from a furnace 3 to a rollerway conveyer 5 with inversion of the billets comprises a pivotally mounted U-shaped transfer member 6. Billets ejected from the furnace slide down a short skid 10 on to a limb 9 of said member 6 being transferred to the other limb 12 and then discharged therefrom on rotation of said member. In the discharge position the lower limb of the U- shaped member 6 is below the receiving surface of the rollerway conveyer 5.
Patent GB-515057-A (GB)
Title: Improvements in or relating to dual wheeled vehicles
IPC: B60T1/06
Filed: 1938-05-20
Abstract: 515,057. Vehicle wheels ; brakes. DETROIT COMPENSATING AXLE CORPORATION. May 20, 1938, No. 15126. Convention date, May 20, 1937. [Classes 103 (i) and 144 (i)] In a dual wheel arrangement for vehicles wherein the wheels are independently rotatable on an axle, each wheel is provided with a brake drum and brake shoes or a band is adapted to be applied simultaneously to the two drums. In Figs.' 3 and 4, the two wheels 10, 11 have bearings 15 on a member 44 which is mounted on the axle 12 by a horizontal pivot member 46 so that the wheels remain always perpendicular to the road thereby equally distributing the load between the wheels. The pivot 46 is formed as a hydraulic cylinder containing pistons 50, 51 connected by rods 52 and toggles 53 to pairs of brake shoes 45, 47 which when pressure liquid is forced into the cylinder through a passage 32 in the axle 12 are applied to brake drums 40, 41 secured respectively to the wheels 10, 11. The shoes are anchored to the member 44 by sliding pins 48<1>. In a modification, the brakes are applied by mechanical means. In this case a flexible brake band for each drum is anchored at its middle point and the single pair of toggles and connecting rod such as 52, 53 are operated by a cable attached to the rod 52 and passing through passages in the horizontal pivot member and axle 12. In Fig. 1, the pivot is dispensed with and the pair of brake shoes 25 are common to the two drums 20, 21, these and the shoes being of conical form. The shoes are applied by pistons 33, 34 in a hydraulic cylinder arranged in the axle 12 and connected to the middle points of the shoes.
Patent GB-731573-A (GB)
Title: Blade particularly suitable for aircraft and manufacture thereof
IPC: B64C27/46
Filed: 1953-06-01
Abstract: 731,573. Blades for aircraft propellers and helicopter rotors. JACOBS AIRCRAFT ENGINE CO. June 1, 1953 [June 3, 1952], No. 15183/53. Classes 4 and 114. [Also in Group XXII] A hollow metal blade, for an aircraft propeller or helicopter rotor, comprises a main portion 2, formed by extrusion and drawing (see Group XXII), having integral stiffening ribs 16, 18. The root end 3 is closed by an insert, which may be welded, riveted, or bolted to the main portion and a separate faired tip is secured thereto in a like manner. Balancing material 20, such as lead, may be inserted in the leading edge portion 8. The tip 4 may also carry a balance weight 50, Fig. 4 (not shown) which may extend forwardly of the leading edge.
Patent GB-529645-A (GB)
Title: Improvements relating to distributors for the spark ignition apparatus of internal combustion engines
IPC: F02P7/02
Filed: 1939-05-23
Abstract: 529,645. Rotary distributers. LUCAS. Ltd., J., WATSON, E. A., and WHITEHOUSE, H. E. May 23, 1939, No. 15280. [Class 38 (v)] A radio-interference suppressing resistance, in the form of a carbon strip c, is arranged in a radial recess a in the distributer-arm b and in contact, either directly, or through springs f, t provided with locating flanges g, with the distributer electrode h and a collectorcontact e of concavo-convex form, which is pressed into, and held in, a circular end of recess a coinciding with the rotation-axis of the arm b.
Patent GB-1361169-A (GB)
Title: Vehicle steering system and control therefor
IPC: B62D5/065
Filed: 1973-03-30
Abstract: 1361169 Controlling vehicles ALLIS-CHALMERS CORP 30 March 1973 [5 April 1972] 15374/73 Heading B7H In a steering system for a walk type lift truck having a wheeled power unit 11 pivotally secured to the frame of the truck a reversible electric motor 61 driving a pump 63 is controlled in one direction or in a reverse direction by a pair of switches 81, 82, respectively on a central handle 26 so that fluid may be fed via a control valve 68 to a double acting hydraulic actuator 38 connected between the frame and the power unit 11 and operable to pivot the power unit 11  in one or other of its steering directions. As shown in Fig. 2 a cylinder part 31 of the control unit 11 has a cable 33 encircling it with its ends secured to opposite ends of cylinder 37 which reciprocates on a fixed piston 46 connected via a rod 47 to the frame 13 of the lift truck. When switch 81 is depressed pump 63 delivers pressure fluid to bore 86 of valve 68 for land 91 of valve spool 89 to move to the right, as viewed in Fig. 3, so that chamber 94 of jack 38 is pressurized via port 93. Land 101 will have moved sufficiently to the right for fluid from chamber 106 of the jack 38 to be exhausted via port 108, portion 102, and port 71 to the pump 63. Similarly switch 82 causes the chamber 106 to be pressurized. The reservoirs 73, 74 act as make up fluid sources for the hydraulic circuit. A centring spring 111 maintains valve spool 89 in its illustrated centred position in which passages 103 and 92 are interconnected thus allowing the operator to manually steer the power unit 11 without energizing the power steering system. (For Figures see next page.)
Patent GB-215990-A (GB)
Title: Lubricating bolt
IPC: F16N11/02
Filed: 1923-06-13
Abstract: 215,990. Reich, E. June 13, 1923. Force - feed lubricators. - Lubricant is supplied to passages 3, 4 in a lubricating-bolt 1 by a spring-supported piston 7 threaded into a hollow extension 2 of the bolt. The piston slides on a rod 6 of square crosssection fixed to a cap 5 having a smooth bore covering the extension 2. By rotating the cap 5, the piston is moved up or down in the extension. An annular recess may be formed in the cap to receive the upper end of the extension.
Patent GB-115766-A (GB)
Title: Improvements in or relating to a Portable Fire-escape combined with or without a Dressing Table or Wash-stand.
Inventor: BERRILL MICHAEL
IPC: E06C1/00
Filed: 1917-10-24
Abstract: 115,766. Berrill, M. Oct. 24, 1917. Ladder escapes. - A portable fire - escape, which may be combined with a dressing-table or washstand, comprises a movable stand 1 on castors having a semi-enclosed inierior, in which is mounted in spring- supported bearings 16 a drum 6 having a steel or other fire-proof rope ladder 8 mounted thereon. The ladder is lowered by means of a weight 9 with projecting arms 10 adapted to hold it a short distance from the wall. The sides of the stand are provided with openings 4, through which the drum 6 is passed. The stand is provided with an inspection opening at the top, and hand rails 26.