baber/WOPTO huggingface dataset:
Patent GB-1159337-A (GB)
Title: Piezoelectric Transducers
Inventor: SCHAFFT HUGO WILLY
IPC: H02N2/00
Filed: 1967-04-04
Abstract: 1,159,337. Piezoelectric transducers; acoustic horns. MOTOROLA Inc. 4 April, 1967 [13 June, 1966], No. 15326/67. Headings H4J and H4X. An electro - acoustic transducer, e.g. a "tweeter" or microphone, has the apex 14 (Fig.2), of a compliant aluminium diaphragm 12 secured to a piezoelectric element 18, whereby in use the element 18 is subjected to undulations along its extent outwardly from its axis similar to vibrations of a mass in free space. The element mass is preferably greater than the diaphragm mass. The apex 14 extends into an aperture 16 of element 18 in the form of a bimorph crystal having outer electrodes 20, 22 connected together and to wire 26. Element 18 includes two piezoelectric wafers 28, 30 fastened together by a metal shim (32), Fig. 4 (not shown). Each wafer has inner electrodes (20A, 22A) and wire 34 connects shim (32) to a terminal 36. Epoxy adhesive 38 at aperture 16 mounts element 18 to diaphragm 12. Diaphragm 12 is mounted on a frame 10 and has a damping rubber ring 40. An alternating voltage across the electrodes causes the element 18 to oscillate (Fig. 3, not shown) and a nodal ring (72) Fig. 1 (not shown), occurs. Alternatively by applying sound waves in front, the diaphram 12 is stimulated to vibrate along axis 74 and produce a voltage gradient across wires 26, 34. Aperture 16 should be sufficiently small not to adversely affect the vibrational mode. Alternatively a non- apertured element 18 may be cemented to the apex 14, such apex 14 preferably having a flat end. In another embodiment a mass in the form of a ring (76), Fig. 5 (not shown), is attached to the outer periphery of the element 18 by clips (78). Ring (76) decreases the resonant frequency of the element 18, permits a heavier diaphragm 12, but increases mechanical losses. Alternatively, element 18 (Fig. 6), is attached to apex 14 through a rubber plug 80 adhesively attached to apex 14. Element 18 is resiliently held in an annular groove 84. The plug 80 dampens vibrations and reduces the coupling between diaphragm 12 and element 18. An element 18 of square (Fig. 7, not shown) or other shape may be used. In a further embodiment an exponential or hyperbolic horn body 100 (Fig. 11), has a plurality of passageways 102. A small diameter diaphragm 104 is closely spaced from the horn body 100 by an annular spacer 106. An annular clamp 108, bolted to body 100, holds the diaphragm 104 and spacer 106 against body 100. A piezoelectric wafer 110 is mounted on diaphragm 104, apex 112 extending through the wafer aperture. Embodiments in which the diaphragm is of elliptical cross-section or the apex is offcentre are envisaged . The element 18 may be freely mounted at its outer edge. Local circuit.-An inductance coil (44) ,Fig. 1 (not shown) may be inserted between a signal source and one terminal of the transducer to improve "tweeter" response. (Fig. 1, not shown).
Patent GB-569821-A (GB)
Title: Improvements relating to oil retaining and dirt excluding seals for use with machinery bearings
IPC: F16J15/32
Filed: 1943-09-18
Abstract: 569,821. Stuffing-box substitutes. SUPER OIL SEALS & GASKETS, Ltd., and MOXON, L. A. Sept. 18, 1943, No. 15351. [Class 122 (v)] An oil and dirt seal comprises a moulded flexible annular member b having an inner or outer peripheral contact portion b<1> adapted to accommodate an annular spring f, and a metal annular member a<1>, a<2> of various forms incorporated in the moulding operation and having an exposed outer or inner peripheral portion. Specification 541,336 is referred to.
Patent GB-1057752-A (GB)
Title: Control system for hydraulically operated equipment such as excavators
IPC: E02F9/22
Filed: 1964-04-14
Abstract: 1,057,752. Exacavating - machines. ORENSTEIN-KOPPEL UND LUBECKER MASCHINENBAU A. G. April 14, 1964 [April 24, 1963], No. 15377/64. Heading E1F. [Also in Division F1].  In a control system for a hydraulic excavator having two working circuits each including a variable-stroke hydraulic pump 1, 2 either the cylinder 11  for the excavator arm or the cylinder 5 for the jib may be operated by the conjoint discharge of both pumps when the other cylinder is not in operation. Cylinder 4 is for a bucket. To operate the cylinder 11 on full capacity, valves 12 and 13 are moved to allow fluid from pump 2 to flow directly to the control valve 14, valves 6-8 being moved so that fluid from pump I opens a non-return valve 15 and thence flows to valve 14. Cylinder 5 is operated similarly except that fluid flows to the control valve 8 through a further non-return valve 16, and another non-return valve 17 operates in conjunction with a throttle 18.
Patent GB-1453236-A (GB)
Title: Loading device for projectiles
IPC: F41A9/42
Filed: 1974-04-08
Abstract: 1453236 Ramming of projectiles RHEINMETALL GmbH 8 April 1974 [21 April 1973] 15404/74 Heading F3C A projectile ramming lever 16 is pivoted on a fulcrum 18 which passes through a circular path so that the end of the lever which acts on the projectile moves in an approximately linear path. Two pairs of levers 10, 12 move a loading tray 14 with a projectile from a loading position up to a ramming position. An hydraulically driven rack 42 is moved to move a toothed segment 40 with an integral planet gear carrying lever 24 having the fulcrum 18. A fixed toothed rim 32 acting as a sun gear has a meshing intermediate gear 34 which, in turn, meshes with a planet gear 20 (on the fulcrum 18) integral with the lever 16.
Patent GB-974184-A (GB)
Title: Improvements in or relating to gas chromatography
Inventor: SCOTT RAYMOND PETER WILLIAM
Filed: 1962-04-24
Abstract: The inner metallic surface of a gas chromatography column is coated with a substance of low or negligible absorbent or adsorbent power with respect to the components to be analyzed. The buffer material may be P.T.F.E. whilst the support for the liquid phase may be diatomaceous earth or silicon granules.  In an example 60-80 BS mesh "Celite" (Registered Trade Mark) has 2 1/2 % w/w hydrocarbon oil on it.  The column is said to operate with high efficiency at high gas pressures and temperatures e.g. up to 250  DEG C.  The analysis of fatty acid esters is mentioned.  Specification 921,215 is referred to.
Patent GB-173204-A (GB)
Title: Improvements in the method of and means for joining electric conductors
IPC: H01R4/22
Filed: 1921-06-03
Abstract: 173,204. Naamlooze Vennootschap Electriciteits Maatschappij Electrostoom, (Assignees of Jaspar, C. H.). Dec. 20, 1920, [Convention date]. Addition to 164,334. Sleeve couplings.-The cap 3 of hard rubber or other insulating-material, which. is screwed on to the turned conductors 2, as described in the parent Specification carries an internally-screwed steel or other metal sleeve 1 instead of a wire helix. In order to prevent rotation of the sleeve in the cap, the sleeve is provided with barbs 6, and with a polygonal head 5 fitting a similar recess in the cap. Saw cuts 4 may be provided to give elasticity to the sleeve, and to accommodate chips formed when the cap is screwed on to the conductors.
Patent GB-612293-A (GB)
Title: Improvements in undergarments
IPC: A41B9/02
Filed: 1946-05-23
Abstract: 612,293. Pants. COOPER'S, Inc. May 23, 1946, No. 15659. Convention date, Sept. 27, 1945. [Class 141] An undergarment in which leg portions 11 are joined to a central portion 10 by seams 20 extending down the front of the garment, along the groin lines and edges of the crotch and up the rear portion of the garment, is characterized in that each leg portion 11 has an overlapping layer of material which extends completely around its base with part of the encircling edge of the overlap extending and secured to the crotch by the seam 20. The leg portion is formed from a piece of material cut to the shape shown in Fig. 3 having an extension 14 which is folded along a line 15 and.the arcuate edge 16 spread into a broader arc 18 which is sewn to the main leg section 13. A seam 22 joins the two ends of the two layers of material to form a leg encircling band which may be folded either inwardly or outwardly of the leg. The garment may be made from knitted material, the crotch zone 21 being formed from a double layer with a tuck 23 provided to give fullness.
Patent GB-1091495-A (GB)
Title: Improvements in or relating to electrical switching arrangements
Inventor: PRIOR HECTOR THOMAS
IPC: H01H67/26
Filed: 1965-04-13
Abstract: 1,091,495. Selector switches. INTERNATIONAL STANDARD ELECTRIC CORPORATION. April 7, 1966 [April 13, 1965], No. 15679/65. Heading H1L. The co-ordinate array of contact sets of a cross-bar switch and the associated operatebars are located in a sealed housing containing an inert atmosphere of dry nitrogen. The operate bars are coupled to selecting electromagnets, situated outside the housing, through flexible diaphragms in the housing walls.
Patent GB-983772-A (GB)
Title: Improvements in or relating to channel selector and fine tuning devices
IPC: H03J1/14
Filed: 1963-04-22
Abstract: 983,772. Adjusting radio tuning. OAK MANUFACTURING CO. April 22, 1963 [June 21, 1962], No. 15721/63. Heading H3Q. A channel selector and fine tuning device comprises a driveable fine tuning member for each channel, a rotatable fine tuning shaft and drive means responsive to rotation of the shaft to move into and out of driving engagement with a fine tuning member displaced in such a manner that at each channel selection position the fine tuning member pertaining to the channel selected is positioned for engagement with the drive means. As shown a channel selector shaft 14 is journalled in walls 11, 12 and is arranged so that it may be rotated in a step by step manner by means of spring 16 and index plate 15, each step corresponding to the setting for one of the channels. The fine tuning mechanism includes a rotor support 25 mounted on channel selector shaft 14, on which support is splined rotor 29 in which is mounted fine tuning components such as inductors or capacitors, one for each channel and provided with tuning screws 30. Each screw 30 is provided with a gear head 31 which in operation meshes with a driven gear 48 integral with a gear shaft 47 on which is fixedly mounted a driven gear or pinion 46 driven by gear 45 mounted on the fine tuning shaft 40 which is coaxial with the channel selector shaft 14. In order to engage and disengage driven gear 48 from gear head 31, gear shaft 47 is journalled in a bifurcated drive link 50, Fig. 4, the opposed legs 51, 52 of which straddle shaft 14 and are connected by portion 53 which is slidably received in slot 54 in front plate 11. Spring 56 urges the link 50 out of the fine tuning position so that when the shaft 40 is not rotated driven gear 48 does not mesh with gear head 31. Outwardly extending fingers 65 of a drive plate 60, mounted on fine tuning shaft 40 and arranged by means of friction-type sliding clutch 61, 63 to rotate in either direction with shaft 40, are received in slots 66 in legs 51, 52 and on rotation of fine tuning shaft 40 the drive plate 60 rotates with this shaft until one of the fingers 65 has engaged the base of its slot 66 and moved drive link 50 radially inwardly towards shaft 14. The drive link 50 is thus moved to the fine tuning position and driven gear 48 engages with the selected one of the adjusting screw gear heads 31 corresponding to the channel selected. When the knob on fine tuning shaft 40 is released the spring 56 moves link 50 out of the fine tuning position and the tuning will not be disturbed as other channels are selected. If the direction of rotation of the fine tuning shaft 40 is reversed the other drive plate finger 65 will move link 50 inwardly to the fine tuning position. Specification 913,382 is referred to. Reference has been directed by the Comptroller to Specification 913,382.
Patent GB-184311-A (GB)
Title: Improvements relating to screwed stoppers
IPC: B65D51/24
Filed: 1921-06-08
Abstract: 184,311. Greenhalgh, F., and Greenhalgh, R. S. June 8, 1921. Handles.-Relates to means for manipulating screw-stoppers for petrol cans, &c., of the type comprising a handle for the can adapted to serve also for closing or releasing the stopper. The handle a is hinged at one end to a member b encircling the neck c of the spout. The other end is adapted to engage a catch e. In use, the handle is disengaged from the catch e by moving it first away from the slot, and then horizontally towards and through it, and is swung into the position shown in broken lines so that the edges engage lugs on the top of the screw stopper, which can then be unscrewed.
Patent GB-962058-A (GB)
Title: Feed stop mechanism for lathes and like machine tools
IPC: B23Q16/00
Filed: 1962-04-25
Abstract: 962,058. Lathes. OKUMA MACHINERY WORKS Ltd. April 25, 1962 [Feb. 19, 1962 (2)], No. 15834/62. Heading B3T. In a feed stop mechanism for a lathe in which the feed drive is by worm and wheel 13, 14, the worm 13 is pivotally mounted on the machine carriage apron 15, by a worm rocker block 12. The worm is held in driving engagement with the wheel 14 by a spring-biased lever 6 which engages an extension arm 8 of the rocker block 12. A shaft 3, journalled in the apron 15 carries a rock arm 9 and a feedengaging lever 4. One end of the rock arm 9 engages the block 12 and the other end has a tripping lug 5 which contacts the lever 6. A trip dog adjustably mounted on a rail 11 below the carriage apron 15 is engageable with the feed lever 4 so that upon contact between the dog 1 and a lug 2 on the lever 4 the shaft 3 partially rotates, which moves the rock arm 9 displacing the latch lever 6 which permits the worm 13 to drop and disconnect the feed drive. An alternative method of spring-biasing the latch lever is described.
Patent GB-987819-A (GB)
Title: Apparatus for packaging envelopes
IPC: B65B27/08
Filed: 1963-04-23
Abstract: 987,819. Packaging envelopes. R. WINKLER, and K. DUNNEBIER. April 23, 1963 [May 3, 1962], No. 15948/63. Heading B8C. Apparatus for packing packets of envelopes or the like into folding boxes or cartons is characterized in that the direction of movement of the boxes is in a horizontal, straight line perpendicular to the direction of movement of the envelopes while the direction of removal of the filled boxes is parallel to the direction of movement of the envelopes or downwards. Packets P of envelopes are pushed on to a table 1, the last of a predetermined number initiating a working cycle of the machine and thus causing chains 10 with attachments 11 thereon to move an open unfilled carton from a pile I to a filling station II. Spring guides 65, 67 are swung into the carton mouth and the packets of envelopes are pushed therein by pusher arms 19 on a carriage 18, which carriage is mounted on a threaded shaft 13 and splined shaft 14 and moves towards the carton due to the rotation of the shaft 13. The arms 19 are brought into engagement with the packets by rotation of the shaft 14. The guides, carriage and arms then return to their initial positions and the side flaps of the carton closure which were opened by an air-blast prior to the filling operation are folded in by sliding elements (not shown). The chain 10 then moves the carton to station III where the bottom closure flap is folded in by a guide 83 and the top closure flap is gummed and then folded on to the bottom closure flap by a guide 86. Finally the carton passes to a drying station IV from which it is removed either parallel to the direction of movement of the envelopes before they are inserted into the cartons or downwards.
Patent GB-534647-A (GB)
Title: Improvements in contour maps and methods of making same
IPC: G09B29/12
Filed: 1939-06-10
Abstract: 534,647. Maps. AERO SURVEY CORPORATION. June 10, 1939, No. 15955/40. Convention date, June 17, 1938. Divided out of 530,331. [Class 146 (ii)] A relief contour map is prepared from a block of carvable material having layers of contrasting material located at pre-determined positions. A block of soft opaque plaster of light colour is divided into layers by thin laminµ of dark colour so that, when carved, the laminae reproduce the contour lines. The layers may be of uniform or varying colour, and in the latter case the laminµ may be omitted. Specification 530,331 is referred to.
Patent GB-119926-A (GB)
Title: Improvements in or relating to Sheet Cutting, Folding and Collecting Machines.
Inventor: MELLERSH-JACKSON WILLIAM JOHN
IPC: B41F13/54
Filed: 1917-11-01
Abstract: 119,926. Jackson, W. J. Mellersh-, (Goss Printing Press Co.). Nov. 1, 1917. Delivery apparatus; associating-apparatus; cutting-apparatus.-A web-cutting machine, particularly for use in connexion with a printing-machine is provided with cutting means adapted to operate on two or more webs while arranged side by side or on adjacent longitudinal portions of a single web, and to cut sheets of one length from one web or web portion and sheets of another length from the other web or web portion. Separate folding-mechanisms are provided for the shorter and longer sheets respectively. In the form shown, one half of the width of the web x is cut into sheets of half the length of those into which the other half is cut, by means of a pair of transverse cutting cylinders 11, 15 provided with two pairs of detachable shearing knives 13, 16, and 21, 24, the pair 21, 24 extending throughout the width of the web x and the pair 13, 16 extending only half way across. A rotary slitting disk 31 may be provided to slit the web longitudinally or separate side by side webs or sheets may be fed to the cutting cylinders 11, 15. The severed sheets are forwarded by one or two sets of disks 38, 40, and 50, 52 having cut-away parts to ensure prompt release of the tail end of the sheets. One set or a part of one set of these disks mav be rendered inoperative by setting them with their cut-away parts adjacent to each other and disconnecting them from their shafts, or the disks may be withdrawn from contact with the sheets by the operation of screws 57, 60 connected to the bearings of their shafts. The shorter sheets are taken by grippers 107, 108, 109 on a cylinder 105 and transferred as single sheets or as a group of collected sheets to a longitudinal folding apparatus comprising driven folding rollers 111 and an oscillating cam operated folding blade 116, and the folded sheets are deposited in a container 115. The longer sheets are talen by grippers 72 on a cylinder 70 and are trai sversely folded either singly or in a collected group, by a folding blade 75 and folding jaws 82, 83 on a cylinder 80. The folded sheets may be delivered directly to a pocketed conveyer 100, or may be led to a longitudinal folding apparatus comprising a pair of folding rollers 90 and an oscillating blade 94. The sheets may be slit longitudinally by slitters 79 co-acting with the cylinders 80 or 70, and the severed sheets conducted to corresponding longitudinal folders arranged side by side.
Patent GB-993690-A (GB)
Title: Apparatus for spraying the interior of a heat exchanger
IPC: F28G3/16
Filed: 1964-04-17
Abstract: 993,690. Fluid heater cleaners. DIAMOND POWER SPECIALTY CORPORATION. April 17, 1964 [May 21, 1963], No. 15965/64. Heading F2N. [Also in Division B2] Apparatus for mounting in the wall and spraying the interior of a heat-exchanger includes a spray tube 26 adapted for reciprocation between retracted and projected positions relative to the heat exchanger, means responsive to movement of the tube for starting and stopping a flow of liquid treating solution in the tube to effect, in operation, a spraying cycle, and means responsive to movement of the tube for causing a supply of pressurized gas to flow through the tube to purge the tube at the end of a spraying cycle. As shown, the tube 26 is projected and retracted by a double-acting, airoperated cylinder 32 and carries a block 42 from which projects a pin 44, the latter, as the tube is moved to and fro, actuating bifurcated cams 48, 52 to respectively open and close valves 50, 54. The valve 50 controls the flow of compressed air from an accumulator 74 to the spray tube to purge the tube of the residuary slurry of liquid chemical additive such as magnesium oxide and/or calcium oxide which is sprayed on to the heat-exchange surfaces; the valve 54 controls the flow of slurry from a supply header 60, the slurry passing to a fitting 66 connected by a flexible hose to the spray tube. A continuous trickle of compressed air is discharged from the spray tube when the tube attains the fully retracted position thereof. A number of sprayers may be operated by an automatic sequentially phased control system.
Patent GB-1188775-A (GB)
Title: Improvements in Fluid Pressure Control Apparatus.
IPC: F15B15/06
Filed: 1968-04-03
Abstract: 1,188,775. Ratchet gearing. COMPAGNIE DES COMPTEURS. 3 April, 1968 [20 April, 1967], No. 15985/68. Heading F2Q. [Also in Division F1] A toothed wheel 9 is rotated in one direction by a pawl 6a and in the opposite direction by a pawl 6b, the pawls being carried by a rod 2 urged by springs to the central position shown and reciprocated to one or other side of the central position by fluid pressure acting on pistons secured thereto. The pistons are secured to opposite ends of the rod 2 and each is slidable in a cylinder which is alternately pressurized and exhausted to cause the reciprocation. The ends 6<SP>11</SP>a, 6<SP>11</SP>b are connected together by a tension spring (not shown). The pawl assembly is movable axially of the ratchet-wheel 9 to bring one or other of the pawls out of engagement with the wheel.
Patent GB-1309712-A (GB)
Title: Spindle assembly
IPC: F04D29/04
Filed: 1971-05-20
Abstract: 1309712 Fluid bearings COMPAGNIE INDUSTRIELLE DES TELECOMMUNICATIONS CITALCATEL 20 May 1971 [20 May 1970]- 16090/71 Heading F2A [Also in Division B3]  A shaft 3 is journalled in a bearing 1 by a fluid film produced by air supplied under pressure through nozzles 2 equi-angularly spaced around the shaft axis, axial thrust on the shaft being transmitted through a flange 12 which engages a shoulder of the bearing 1 and an abutment flange 13 secured to the bearing by a spacer 14, air being supplied to the thrust bearing by equi-angularly spaced nozzles 16, 17. Each nozzle has a bore 38 of substantially constant circular cross-section and a cup 39, divergent upstream and hemispherical or frustoconical, Fig. 8. Air is exhausted through grooves 6, 10, 11 18, 19. The shaft carries a flange 4 to which a workpiece may be attached, and is driven by a motor 22 through a flexible coupling 23.