baber/WOPTO huggingface dataset:
Patent GB-1029505-A (GB)
Title: Improvements in or relating to frequency response measuring arrangements
IPC: G01R27/32
Filed: 1964-07-09
Abstract: 1,029,505. Keying carrier frequencies; diode switching circuits. SIEMENS & HALSKE A.G. July 9, 1964 [July 10, 1963 (2)], No. 28264/64. Headings H3R and H3T. [Also in Division G1] A circuit arrangement for measuring the frequency response of a device X (Fig. I) includes a wobbulating oscillator 1 which supplies a varying frequency signal to the device, the output from the device being fed to the vertical deflection plates of a cathode-ray oscilloscope, while a signal from a sawtooth voltage source 4 proportional to the instantaneous value of the oscillator frequency is supplied to the horizontal plates. A comparator 7 is used to compare this sawtooth voltage with a reference signal and applies a marking signal to the oscilloscope when the two voltages are equal, . thus marking that part of the oscilloscope trace corresponding to the frequency represented by the reference signal. The voltage source 4 controls the oscillator 1. A pulse shaping stage 9 may be included between the comparator 7 and the oscilloscope. The comparator may operate as shown in Fig. 2 by applying the voltages to be compared, U1 and U2, to opposite ends of a pair of silicon diodes 12 and 13 parallel connected in opposite directions. When the voltages are equal neither diode conducts, when they are not equal one diode must conduct. The diodes are connected across the input of an oscillator 16, so that when they are conducting they present a low impedance across the oscillator input and prevent it from operating. When they are non- conducting (i.e. the two input voltages are equal) the oscillator operates and delivers an output to the tuned transformer 18.
Patent GB-710300-A (GB)
Title: Axial flow compressor
IPC: F04D19/02
Filed: 1951-12-03
Abstract: 710,300. Axial flow compressors. KEAST, F. H. Dec. 3, 1951 [Dec. 2, 1950], No. 28270/51. Class 110(1) In an axial flow compressor, the cross-sectional area of the annular passage between the stator and rotor diminishes progressively in a downstream direction through the stages intermediate the first stage and the last stage, while said cross-sectional area diminishes through the first stage at an average rate which is less than the average rate of diminution through the intermediate stages, and through the last stage it either diminishes at an average rate which is less than the average rate of diminution through the intermediate stages, or it increases. As shown, the compressor has ten stages defined by rotor blades 1R to 10R mounted on a drum 13, and stator blades IS to 10S mounted on a casing 14. The front bearing of the rotor is mounted in a housing 15 supported from the casing by long-chord streamlined struts 16. Guide inlet vanes 11, supported at their respective ends by the casing and housing, are disposed immediately in front of the blades 1 R. Air is discharged by the blades 10S into diffusers 12 which communicate with the combustion chambers 17 of a gas turbine engine. The blading employed in the stages 2 to 9 is identical, at any given radius, in aerofoil section and incidence to the rotor blades and stator blades of the second stage. The radius of the rotor drum is constant from stage 2 to stage 7, and identical rotor blades may be used in these stages by suitably cropping the tips. With the corresponding stator blades it is necessary to crop the roots. From'stage 7 to stage 9 the radius of the stator is constant while the radius of the rotor is progressively increased, and the tips of the stator blades and roots of the rotor blades must therefore be cropped. It is stated that, while ihe cross-sectional area of the annular passage diminishes less rapidly across the first stage than through the intermediate stages, the crosssectional area of the passage diminishes more rapidly across the blades 1S, since the leading edges of these blades are lengthened in order that less work may be done in the first, stage than in any of the intermediate stages. Across stage 10 the radius of the stator remains constant, while the radius of the rotor progressively increases to effect a departure from the uniform convergence of the annular passage through stages 2 to 9. It is stated that the blades 1OR may. in addition, be so shaped that the whirl velocity which they impart to the air is less than the whirl velocity applied by other rows of rotor blades, in order that the work done in stage 10 may be less than the work done by previous stages and results in an increase of static pressure over the stage comparable to the increase of pressure over previous stages.
Patent GB-986131-A (GB)
Title: Improvements in or relating to pressure switches
Inventor: PANNELL ROBERT GEORGE
IPC: H01H35/28
Filed: 1960-08-16
Abstract: 986,131. Fluid actuation of switches. GRAVINER MANUFACTURING CO. Ltd., and WILKINSON SWORD Ltd. Aug. 1, 1961 [Aug. 16, 1960], No. 28270/60. Heading H2B. A pressure responsive device is compensated for differential thermal expansion of its supporting members by means of a bi-metallic disc 15. The device comprises two electrical contacts 8, 14, whose separation is dependent upon the pressure on a diaphragm 4, and a bimetal disc 15 which opposes any variation in the separation of the contacts 8, 14 due to differential thermal expansion. The contacts 14, 8 are mounted respectively on the bi-metal disc 15 and on a stand off insulator 6 on the corrugated metal diaphragm 4 and their separation is adjustable by rotating a screw-threaded member 18. The bi-metal disc 15 is clamped to a recessed support 16; its effective area and therefore the degree of compensation applied is governed by the area of the recess in the support 16 which is adjusted while first setting up the switch to obtain a near constant contact separation over the desired range of temperature.
Patent GB-1307930-A (GB)
Title: Sheet metal and process of and apparatus for slitting the sheet  metal
IPC: B23D33/10
Filed: 1970-06-11
Abstract: 1307930 Making heat exchanger panels OLIN CORP 8 Dec 1970 [26 Jan 1970] 58284/70 Headings B3A and B3W Sheet metal 106 having a plurality of inflatable fluid passageways 8 is slit into strips each including at least one passageway by means of a passageway 5, located a predetermined distance from the other passageways, which is forced open by a mandrel 24 at a predetermined distance from slitting cutters 102. The mandrel may, Fig. 7, be shaped both to slit and force open the passageway or a second slitting cutter 103 may cut off half the width of the passageway 5 leaving a modified mandrel (Fig. 11, not shown), thereby to open the passageway. The metal sheet may be forced against the mandrel by a spring-pressed plate 114 or roller (116), Fig. 13 (not shown), and the mandrel may be adjusted transversely of the sheet by a micrometer drive 113.
Patent GB-602204-A (GB)
Title: Improvements in cranes
IPC: B66C23/26
Filed: 1945-10-26
Abstract: 602,204. Cranes. FAURE, A., and FAURE, A. Oct. 26, 1945, No. 28353. Convention date, Sept. 24, 1941. [Class 78 (iv)] In a crane of the kind comprising a horizontal jib pivotally mounted at the top of a mast and forming a runway for a lifting trolley, and in which a counterbalancing jib is provided, lack of balance between the jibs when an attempt is made to lift a load exceeding a prescribed limit consistent with the location of the trolley, is caused to stop the lift or travel of the load through the differential action of the jibs on a member controlling the engagement between the prime mover and the particular transmission mechanism by which the load is being shifted. As shown, the jib 2 forming the runway for the trolley 13 is pivotally mounted at 2<1> on a mast head 3 and is counterbalanced by a weighted jib 6 pivoted at 6<1> on the mast head. The jibs are connected by rods 8, 9 to an arm of a lever 10 pivoted at 11 to the mast head, the other arm of this lever being forked and engaging a tripping shaft 12. The trolley is operated by a cable 14 passing round pulleys 15 and over a drum 16 which is driven through a bevel gear 17 by a sleeve 18 loosely surrounding the shaft 12 and driven through a spur gear 19 by a shaft 20. This shaft extends down through the mast 21 to a transmission gear 22 operated by a control rod 24 fitted with a handle 24<1>. The load hoisting cable 25 is anchored to the jib 2 at 26 and passes over a pulley 28 down the mast to a winch 29 provided' with a clutch 30 operated by a control rod 32 provided with a handle 321. The mast head 3 is rotated on rollers 5 by a pinion 35 engaging a toothed ring 34 on the head, the pinion being secured to a shaft 36 connected with a reversing gear 37 controlled through a rod 39 by a handle 39<1>. The winch 29 and gears 22, 37 are driven from an electric motor 41. The handles 24', 32<1>, 39<1> may be clamped at any position along their respective rods. When an attempt is made to lift an excessive load, the jib 2 tilts slightly and through the tie-rod 8 rocks the lever 10 clockwise so as to depress the shaft 12 which through a fork 43 operates a linkage 42 connected to the control rod 32 so as to operate the clutch 30 and stop the winch. Similarly, when a load is being carried by the cable 25 and an attempt is made to move it beyond its safe radius, the jib is again tilted and through the shaft 12 and linkage 42, the rod 24 is operated to de-clutch the gear 22 and bring the trolley to rest.
Patent GB-366062-A (GB)
Title: Improvements in electromagnets
IPC: H01H63/20
Filed: 1930-09-23
Abstract: 366,062. Automatic exchange switches. SIEMENS BROS. & CO., Ltd., Caxton House, Tothill Street, and FORCEVILLE, E. A., 23, Fossil Road, Lewisham, both in London. Sept. 23, 1930, No. 28486. [Class 40 (iv).] In an electromagnet for operating a ratchet-drive switch an additional spring is used when the armature is near the end of its travel solely to impart an additional restoring force when the magnet is de-energized. In the form shown, the armature 13 is held in its unattracted position by the spring 15 surrounding the pin 14 which enters the nut 16 against the outer edge of which the free end of the second spring 12 normally rests. The distance between the end of the pin 14 and the outer edge of the nut 16 is slightly less than the armature stroke so that the movement is resisted by the spring 12 only for the last fraction of the stroke, and when the magnet is de-energized, this spring gives an initial additional restoring impulse before again reaching the nut 16. The spring 12 may be laminated and adjustably mounted.
Patent GB-712587-A (GB)
Title: Traction device for wheeled vehicles
IPC: B60C27/04
Filed: 1952-11-12
Abstract: 712,587. Pneumatic tyres. MINISTER OF NATIONAL DEFENCE OF H.M. CANADIAN GOVERNMENT. Nov. 12, 1952 [July 16, 1952], No. 28497/52. Class 144(2) A non-skid or traction band for single or twin tyres comprises a plurality of flexibly-interconnected shoes each comprising at least two pivotallyconnected sections which pivot under the influence of the interconnecting means to move the latter radially inwardly to " slack " position and which pivot on the application of wheel load in the opposite direction to tension the interconnecting means, latch means operating automatically on this latter movement to prevent return of the interconnecting means to " slack " position. Fig. 1 shows a single tyre arrangement wherein spaced shoes 20 have on each side of the tyre a connector link 32 for engagement with interconnecting chains 39. Each shoe 20, Figs. 3 and 4, comprises two centrally pivoted sections 21, 22 with ground-engaging ribs 24, 26. Each section 21, 22 has at one end a hollow boss 27 the side walls 28 and 30 of which are slotted to receive a cranked portion 33, 34 of the adjacent end of the other section. The end 34 of each section engages in a connector link 32 which depends therefrom through a hole 31 in the base 29 of the adjacent hollow boss 27. In operation, the two section ends 34 of each shoe are first pulled radially inwardly as in Fig. 4 to allow the connecting chains to be assembled through a gap 40 in the connector links 32. With the shoes loosely assembled on the tyre, the wheel is rotated to bring each shoe in turn under load whereupon the shoe sections are forced to pivot to the position shown in Fig. 3 thereby moving the links 32 radially outwardly to tighten the chains 39, the gap 40 of the links 32 lying with the hollow boss 27. When the shoe sections are in the position shown in Fig. 3, a spring-loaded latch member 35, Fig. 6 pivoted within the hollow boss 27 engages the adjacent end 34 to prevent subsequent radially inward movement thereof. In a construction for twin tyres the shoes each comprise two sections pivoted at adjacent ends on a hook-ended pin engaging a connecting chain disposed between the two tyres. Under wheel load, the shoe sections are forced to pivot away from each other to move the hook-ended pivot pins radially outwardly to tension the connecting chain, spring-loaded stop pins on one shoe section being released automatically into operative position when the sections attain the desired relative position to prevent return pivotal movement of the sections.
Patent GB-1368698-A (GB)
Title: Apparatus for extracting hollow moulded articles from a moulding  device and for subsequently stacking and discharging the articles
IPC: B65G57/16
Filed: 1972-06-19
Abstract: 1368698 Stacking articles INJELEC 19 June-1972 [21 June 1971] 28558/72 Heading B8C An apparatus for extracting from a moulding device, hollow articles such as cups a and for subsequent stacking and discharge of the articles, comprises extraction means having suction means 22 for holding the articles released by the moulding device, to change the orientation of the articles and to deposit them on a receiving plate 28 in a condition in which they are partially inserted in each other, stacker means having a reciprocating motion for axially pushing each article previously deposited on the plate by the extraction means in order to fully insert the article in the previous one and to axially move the same, and discharge means comprising retractable abutments associated with conveying means for axially expelling the stacks obtained when the latter comprise a predetermined number of articles. As shown, in which the apparatus is associated with a machine for manufacturing cups a from a strip 5 of plastics material in a two-part mould 1, 2, the movable part 2 is integral with a vertically slidable plate 3 and produces four cups a simultaneously. A tubular shaft 10 supported in bearings 11, is slidable in apertures 9a and on guides 13 by means of a double acting jack 16, and one end of the tube is connected by a crank 18, the free end of which operates in a curved ramp 20a in a side member 20. A source of vacuum is applied to the other end of tube 10 which is also provided with four suction devices 22. In use, and with the tube 10 in its advanced position, the devices 22 engage the cups a as they are released from the mould and as the tube is retracted by the jack 16, the cups are orientated by virtue of the crank 18 and are deposited on the plate 28. During this motion, the tube 10 is vented to atmosphere by means of a valve mechanism (23), Fig. 5 (not shown), which as the tube 10 rotates, moves a part (10a) of the tube away from a valve plate (24). As the mould part 2 again moves upwardly, a stirrup arm 29 on a shaft 30 is moved by a crank 32 connected to the plate 3 and attached to the shaft 30, to push the cups into a meshing arrangement on the plate 28, where they are held by jacks 35 which project through the plate. The jacks 35 are supported on rails 38 along which they are movable by a jack 39, 40. The jacks 35 and 39, 40 are controlled by a counting mechanism 3<SP>11</SP> associated with a feeler 3<SP>1</SP> on the plate 3 of the mould.
Patent GB-1156908-A (GB)
Title: Improvements in or relating to Belt and like Conveyors
Inventor: CRONE ANTONY JOHN TAPRELL
IPC: B65G47/95
Filed: 1967-06-21
Abstract: 1,156,908. Endless conveyers. CRONE & TAYLOR (ENG.) Ltd. 13 May, 1968 [21 June, 1967], No.28575/67. Heading B8A. A conveyer belt 13 may be bent locally into an S-shape from its normal configuration (Fig. 2, not shown) so as to discharge material to another conveyer 19. The belt is bent by the action of arms 16 carrying pulleys 17, 18. The arms 16 are mounted adjacent a gap in the support stringers 11 of the belt 13. A section 22 of the stringers 13, is adapted to pivot upwardly automatically when the arms are turned into the belt bending position. The belt 13 may be reversible in which case there may be at least one other belt bending station the latter being adapted to be operated in respect of the reverse direction of travel of the belt 13.
Patent GB-784963-A (GB)
Title: Improvements in or relating to pocket stapling machines
IPC: B25C5/02
Filed: 1955-10-10
Abstract: 784,963. Stapling hand tools. GAUT, BLANCAN. Oct. 10, 1955 [July 20, 1955], No. 28731/55. Class 89(3) A pocket stapling machine has a knife or driving blade 21 which is guided between a pair of lugs 20, solid with the front of the staple guide rail 7 and a pair of lugs 24 solid with a bolt 25 secured on the rail 7, the bolt 25 having a lug 26 projecting forwardly through a vertical aperture 22 in the knife 21 which is thus held laterally and the vertical stroke of which _ is limited by the length of the aperture. The knife 21 is freely engaged by the limb 30 of a hairpin spring the other limb 29 of which passes through apertured lugs 28 struck up from the rail 7. The outer casing 35 is formed with ears 38 notched at 39 to provide supports for lateral lugs 23 of the knife 21. A U- shaped leaf spring 40 bears against the staple guide 7 and the casing 35, and serves to retain a plate 42 which bears the trade-mark of the machine, in an opening 41 in the casing. The guide 7 and casing 35 are pivoted to a base B by a pin 6 and a spring 11 wound on the pin 6 holds the staple guide 7 and the base B in spaced relationship in a position determined by projections 4 on, the base engaging holes 10 in the rail. The projections 4 have rounded heads so as to permit their disengagement from the holes 10 in order that the base B may be folded backwards for the purpose of loading the machine with staples and for "tacking".
Patent GB-740736-A (GB)
Title: Improvements in and relating to construction and assembling of ball joints
IPC: F16C11/06
Filed: 1953-10-19
Abstract: 740,736. Ball and socket joints. THOMPSON PRODUCTS, Inc. Oct. 19, 1953 [May 14, 1953], No. 28856/53. Class 65 (2). [Also in Group XXII] A ball-and-socket joint comprises a housing 10 and a ball-ended stud 12 which projects into the housing through a substantially circular aperture 11 opening laterally into the housing, the size of the aperture being only slightly greater than the ball of the stud; and the ball is retained within the housing substantially concentrically with respect to the axis of the aperture by means of an adjustably-positioned seating member 21 which presses the ball against a concave segmental-spherical seating member 18 arranged so as to be movable transversely of the axis of the aperture into and out of a ball-retaining position. To assemble the joint, an abutment 15 is fixed in the housing by tongues 16 pressed from the latter, and the seat 18 is positioned in contact with the abutment, but inclined thereto, to permit the ball end being inserted into the housing. The seat is then pivoted to a position wherein it interlocks with the abutment and also blocks the aperture 11 to prevent withdrawal of the ball end. Seat 21 is then inserted through the open end of the housing and is held in adjusted position by a screwed plug 22. To form the aperture 11, the housing is provided with an axially extending slot slightly shorter in length than the diameter of the finished aperture and having only a very narrow width. The slot is then outwardly swaged by means of an expanding die, preferably actuated from within the housing, to form a substantially tubular opening having a reinforced peripheral edge 13.
Patent GB-680230-A (GB)
Title: Improvements in or relating to apparatus for treating surfaces with liquids
IPC: A47L11/38
Filed: 1949-11-10
Abstract: 680,230. Apparatus for treating surfaces with liquids. HOCKMAN, S. Nov. 10, 1949, No. 28898/49. Class 19. Apparatus for treating surfaces with liquid comprises a pressure tank adapted to contain the liquid under pressure and a cleaning tool or trowel including a plate supporting a porous pad, the said cleaning tool or trowel being connected to the pressure tank by means of a flexible conduit and being provided with means for controlling the flow of liquid to the porous pad. Preferably the apparatus comprises a pair of pressure tanks as in Fig. 1, the tanks 1, 2 being mounted on a base 3 and connected together by a pipe 7. A hand-operated pump 8 is provided in tank 2 whereby pressure is established in both tanks. Each tank is connected (see Fig. 3, not shown) by means of flexible tubing 9 to a trowel 10 which comprises a plate 11 mounted on a handle 12 which incorporates a conduit 13 and a needle or other valve 14 so that connection is made with an elongated channel 15 which is open to the back of the perforated plate 11 over which is fitted a porous pad 17. The latter may comprise a plurality of layers of turkish towelling and may be connected to the plate 11 by a series of spring loaded fingers 18. The flow of liquid to the trowel is controlled by the thumb press 19 and a pressure gauge 20 may be provided. A third trowel which has no provision for receiving fluid may also be provided as a drying off trowel. In use the caps 22, 23 are removed and a cleaning solution introduced into one tank while the other tank is filled with water. The pump is then operated to supply a convenient pressure and the pads saturated by operation of the valves and after using the trowel fed with cleansing solution the surface is washed with the trowel fed with water and finally dried with the separate drying trowel.