baber/WOPTO huggingface dataset:
Patent GB-402223-A (GB)
Title: Improvements in or relating to lawn-mowers
IPC: A01D34/42
Filed: 1932-10-07
Abstract: 402,223. Lawn-mowers. BERGWALL, E., Võrnamo, Sweden. Oct. 7, 1932, No. 27916. Convention date, Dec. 3, 1931. [Class 6 (ii).] A lawn-mower comprises cutting blades 1a, 1b, 1c mounted on arms 6-9 on a shaft 3 and forming a cutter wheel 1 adapted to rotate in such a direction that the blades approach a fixed cutter 5 towards its bottom face. The blades 1a. are plane or substantially plane and each has such a position in a plane intersecting the axis of rotation of the cutters at an acute angle that their plane sides at each point along the cutter edge form an acute angle with that tangent to the surface of rotation drawn in a direction from said point reverse to said direction of rotation and lying in the plane of rotation of said point. The cutter edges are thus formed by intersection of the planes of the blades with the surface of rotation and are thus curved corresponding to conic sections. Where such surface is cylindrical, each cutter must lio entirely within the quadrant of an ellipse. The angle of inclination of the blades to the tangent is preferably less than'60‹ and may vary from 15‹ at one end of a blade to 35‹ at the other end. The blades 1a ... are mounted on pairs of the arms 6-9 by screws 13, 14, Fig. 6, on the arms having flattened necks 16 adapted to engage keyhole slots 11, 12 in the blades. Springs 15 are inserted between the blades and the arms, forked ends of the springs engaging the necks 16 and a projection 19 registering with an aperture 18 on the blade. The resilience of the mounting may be increased by lengthening the necks 16. That edge of a blade which first meets the fixed cutter may be rounded. When the blades are rectangular, the arms 6-9 are relatively displaced angularly in order to provide the inclintion of the blades. Blades in the form of truncated triangles may be provided thus obviating this displacement. The blades may be reversible, having cutting edges on opposite edges. The fixed cutter may be formed of invertable blades arranged in steps and having concave edges curved to correspond with the surface of rotation.
Patent GB-345220-A (GB)
Title: Process of purifying liquids containing arsenic and selenium as impurities
IPC: C01B17/90
Filed: 1929-09-14
Abstract: 345,220. Electrolysis. METALLGES. AKT.-GES., Frankfort-on-Main, Germany. Sept. 14, 1929, No. 27960. Convention date, Nov. 17, 1928. Void [Published under Sect. 91 of the Acts]. Addition to 319,329, [Class 41, Electrolysis]. [Class 41.] Sulphuric acid, purifying.-Sulphuric acid containing arsenic and selenium as impurities is treated with sulphur dioxide before purification by electrolysis in order to increase the conductivity, to further the purification and to increase the concentration of the final product. The temperature should not exceed 30‹ C. Sulphur dioxide may be passed into the anode chamber during electrolysis. In an example 4À5 litres of 60 per cent sulphuric acid containing 0À17 per cent of arsenic is saturated with sulphur dioxide and electrolyzed for 8 hours with a current of 3 amps. at 3À5 volts the temperature being kept below 25‹ C. by cooling. The arsenic content is reduced to 0À01 per cent or less.
Patent GB-294029-A (GB)
IPC: C09D191/00
Filed: 1927-10-20
Abstract: 294,029. Du Font de Nemours & Co., E. I., (Assignees of McBurney, J. D., and Nollau, E. H.). July 22, 1927, [Convention date]. Coating compositions; preventing thickening in paints.-Paints having a drying oil base are prevented from gelation or "livering" by adding a substance adapted to maintain the sol phase and having a dissociation constant between 1.0 and 3.4. -Compositions which have already livered may be restored to the sol phase by the same means. Suitable additions are acids such as citric, tartaric, and malic acids; they may be added in proportion of from 0.1 per cent upwards, either to the composition itself or to the pigment before the vehicle is added. According to a typical example an already gelled composition consisting of 52 per cent of grinding Japan, 43 per cent of lake colouring, and 5 per cent of siliceous matter is liquefied by the addition of 1 per cent of citric acid.
Patent GB-151947-A (GB)
Title: Machine for cutting bevel gear wheels with helical or straight teeth
IPC: B23F5/12
Filed: 1920-10-02
Abstract: 151,947. Dartois, V. G. Oct. 4, 1919, [Convention date]. Gear-cutting.-In a machine for generating bevel-wheel teeth of archimedian spiral form, the correct rolling motion is imparted to the blank by means of a link mechanism and two tools forming the flanks of a tooth have in addition to their radial reciprocating movement a circular reciprocating movement about the apex of the pitch cone of the blank. The tools 1, 2 are supported on carriages 3, 4, working on guides 5, 6, adjustably secured, to vary the convergence of the tools. to a saddle resting in a curved recess in a bowl 20. The saddle may be adjusted to vary the height of the tools by means of a rod 21. The tools are radially reciprocated through links operated fom the driving shaft 14 by an oscillating link 13. To give the circular reciprocating movement to the tools the bowl 20 has dovetail recesses, Fig. 7, and in one or other of these (according to whether right or left hand teeth are to be cut) is placed a slide 32 having a block 33 carried by a crank 34 actuated by a pinion 36. The latter is carried on a shaft 38 having a bevel pinion 39 gearing with a sector 40 on a shaft 41 rocked by means of a reciprocating lever 45. For cutting straight teeth the slide 32 may be removed and the bowl locked against rotary movement. The blank 48 is adjustably mounted on a spindle 49 and is clamped against a socket 50 adjustable in a sleeve 53. The latter carries a hand-operated dividing wheel 56 in a casing 55 rotatably secured in a socket 61 of an angularly adjustable segment 62 locked by bolts 67 to a carrier 63. The latter is rotated by a worm 70 carried on a shaft 71 having a clutch sleeve 73 which may be connected to a wheel 74 to give a slow intermittent rotation to the carrier during the cutting of a tooth or to a pulley 75 to give a quick return. The reversal of the carrier may be performed automatically by means of stops 80, 81. During the rotation of the carrier the blank is rotated to give the correct rolling movement by means of the link mechanism shown in Fig. 6. The guide levers 83, 84 are adjustably pivoted along the fixed bar 88 and have slotted ends engaging a trunnion 85 adjustably fixed to a slide block carried by a curved arm 86 secured to the casing containing the dividing wheel. The pivots 90 are set so that the circular arcs X, Z described by the trunnion 85 approximately correspond to portions of the theoretical cycloid curves. The blank is supported against an adjustable abutment 98. The Specification as open to inspection under Sect. 91 (3) (a) states that the machine is also adapted to produce teeth of circular or of logarithmic spiral form. This subject-matter does not appear in the Specification as accepted.
Patent GB-1307584-A (GB)
Title: Assembly comprising a member and a support therefor
IPC: B60Q1/26
Filed: 1970-06-10
Abstract: 1307584 Clips SOC ANON AUTOMOBILES CITROEN 10 June 1970 [13 June 1969] 28104/70 Heading E2A A device for fixing an element on a support comprises resilient clips 4 unitary with the element and insertable from the outer side of the support into apertures 7 made therein wherein the clips have projections 6 for securing the element on the support. The element has a recess 10 lined with an elastic member 11 and a centring boss 9 on the support is engageable within the recess in order that the outer surface 12 of the element be coplanar with the support section 3.
Patent GB-830649-A (GB)
Title: Cobalt alloys
IPC: C22C19/07
Filed: 1958-09-03
Abstract: An alloy having good corrosion resistance and strength at high temperatures has a composition within the following range in per cent by weight:  .Cr.15-30 .W.5-15 .Ta.0.5-20 .C.0.1-1.3 .Co.and impurities the balance The alloy may also contain one or more of the following element: .Nb.up to 3.0, not exceeding half the Ta content, .Mo.up to 3.5, not exceeding half the W content, .Si.up to 1.5 .Fe and/or Ni.up to 5.0 Mn should not exceed 2.0 and the contents of N, H, Sn and Pb should be as low as possible.  Deoxidizers such as Ca and Mg should not exceed 0.5.  The alloy may be used as parts of gas turbine and other internal combustion engines, heat exchangers, linings for retorts and other chemical and metallurgical apparatus, tubes and glass working tools.
Patent GB-1071833-A (GB)
Title: Printing machine control means
Inventor: HANK DIETRICH
IPC: B41F3/46
Filed: 1965-07-05
Abstract: 1,071,833. Printing-machines. DRUCKMASCHINENWERKE LEIPZIG VEB. July 5, 1965, No. 28333/65. Headings B6B and B6C. In a printing-machine, such as a stop-cylinder press, wherein the pneumatically, mechanically, and electrically-operated members performing the functions of the machine are under the control of a single lever, the lever 1 forms part of a hollow shaft 2 which is connected to the shaft 4 of a starter device 18, and a pawl 17 secured on the shaft 4 can be swung by the shaft to pivot an air-valve 16 to an inoperative position relative to an " off " switch (22, Figs. 2 and 3), to depress that switch and stop the machine, and a Bowden cable device 9, 10 within the lever 1 and shaft 2 can be operated to move a piston 12 to control the supply of air to the sheet-feeding and delivery mechanism. The cable wire 10 is secured at one end to the piston 12, and at the other end to a knob 15 on the end of a sleeve 5 which is mounted to slide on the lever 1, and is urged away from the lever by a spring 11 to a limited extent. In the stop position (Fig. 2), the pawl 17 opens " off" switch (21) and closes switch (22) to de-energize a relay 24, causing a brake to be applied. The valve 16 is, in this position, pivoted upwardly about a pivot 19, and the plunger (25) of a piston in the valve is urged outwardly by a spring, in the absence of a vacuum in the valve. If the central lever 1 is now moved slightly to the left (Fig. 3), the pawl 17 first releases the " off" switch (21), and the relay (24) is energized, a holding contact (23) is closed, the brake is released, but the main motor circuit is still not yet closed by the starter 18. Further rotation of the lever 1 opens the switch 22, and the motor circuit is closed with maximum starter resistance to start the machine at minimum speed. Further rotation of the lever 1 increases the speed of the motor, and the valve 16 is released by the pawl 17 to allow the plunger (25) to rest on the switch 21. When sheets are now fed, the suckers of the sheet feed are thus sealed, a vacuum is created in the valve 16 to cause withdrawal of the plunger (25), and the valve 16 can now fall against a stop (20) with the plunger (25) opposite the switch 21. In the event of a sheet not being taken by the sheet feed means, the vacuum in the valve 16 is destroyed, the plunger (25) is pushed outwardly by the spring in the valve, and the " off " switch 21 is operated to stop the machine. The machine can also be stopped by a safety switch (27).
Patent GB-1415153-A (GB)
Title: Poultry processing machine gizzard cropper
IPC: A22C21/06
Filed: 1971-06-17
Abstract: 1415153 Detaching gizzard &c from poultry STORK BRABANT BV 14 Sept 1972 [17 June 1971] 28406/71 Heading A2U Poultry carcases (not shown) from which the gizzard 1, proventriculus 2, crop 3 and windpipe 4 are hanging are suspended from a conveyer by which they are advanced in the direction 10 so that the crop and the proventriculus are gripped by fixed bars 5, 6 and 7, 8. When the gizzard &c meets a stop 11 the windpipe is drawn from the carcase as the latter continues its movement. After e.g. four gizzards &c have accumulated at the stop an assembly of cutter discs 12, 13, 14 rotated by a motor 16 is advanced by a device 18 to the position shown to make severing cuts so that the gizzards may be collected and the crop and windpipe drop to waste.
Patent GB-686936-A (GB)
Title: Improvements in or relating to frequency modulation signalling systems
IPC: H03C3/09
Filed: 1950-11-21
Abstract: 686,936. Frequency modulation. GEN - ERAL ELECTRIC CO., Ltd., and BRYDEN, J. E. Nov. 16, 1951 [Nov. 21, 1950], No. 28439/50. Class 40 (v). Pulse signals, Fig. 2a, conveying intelligence by the occurrence or absence of pulses 7, or by their timing or duration, are differentiated to produce the pulse form 9, 12, Fig. 2b, before being applied to frequency-modulate a carrier wave. The pulse signals are applied to a differentiating network 1 and the output Fig. 2b, passed through a low-pass filter 3 to a frequency modulator 4 associated with the carrier source 5. The filter rounds the form of the pulses as shown in Fig. 2c. As each positive pulse is followed by an equal negative pulse, the mean frequency of the carrier is not affected by variations in duration or timing of the pulses 1, and the mean frequency can therefore be kept constant by the use of a discriminator 6 acting retro-actively on the modulator 4. At the receiver, the carrier is applied to a frequency demodulator, and the resulting pulses of the form shown in Fig. 2c are integrated and if desired are re-shaped to provide a pulse signal of the form shown in Fig. 2a. The transmitted intelligence is derived from these signals in known manner.
Patent GB-511465-A (GB)
Title: Improvements in and relating to convertible bed-settees and the like
IPC: A47C17/16
Filed: 1938-09-30
Abstract: 511,465. Bed-settees. VEENEMANS, B. Sept. 30, 1938, No. 28447. [Class 52 (ii)] In a bed-settee of the kind comprising a boxlike compartment containing the bed and having a hinged cover 8 which when closed forms the seat of the settee, the cover has hinged thereto a flap 12 which forms the back-rest. The settee has raised end portions 6, and the flap 8, which is hinged to the rear wall at 9, covers the lower middle section, and is preferably in two parts hinged together longitudinally at 11. The backrest 12 is normally supported by pins 15; but in conversion to a bed folds down on the rear part of the cover. 8, the two parts of the latter being then folded together about the hinge 11. The top flaps of the end parts 6 are hinged to the end walls, and carry the pins 15.
Patent GB-250291-A (GB)
Title: Improvements in or relating to the purification, cleansing or washing of carbonaceous and other materials
IPC: B03B1/00
Filed: 1924-11-27
Abstract: 250,291. Laing, B., and Nielsen, H. Nov. 27, 1924. Preparing materials for separation by heat treatment. - Raw carbonaceous materials are subjected to heat treatment between 250-350‹ C. before slates, stones or other foreign impurities loosely admixed therewith are separated by usual dry methods. A retort such as that described in Specification 212,961, [Class 34 (ii), Drying systems &c.], may be used, volatiles being recovered, and in the case of caking coals agglomeration of the pure and impure materials may be effected, grinding or crushing taking place before the actual separation step.
Patent GB-172796-A (GB)
Title: Improvements in or relating to cutting tools, such as reamers, end mills, milling cutters, taps, hollow mills, and the like
IPC: B23D77/04
Filed: 1920-10-08
Abstract: 172,796. Miller, R., and Icke, S. C. Oct. 8, 1920. Reamers; milling-cutters; taps.-The blades of reamers, end-mills, milling-cutters, taps, hollowmills, &c. are adjusted radially by axial movement on a conical mandrel. The blades h, Fig. 7, slide in inclined slots g<1> of a tool a and are locked collectively between screwed plugs j, i, the latter being graduated to indicate the adjustment. In a modification, Fig. 3, the blades have projecting parts b<1> which are retained in undercut grooves in the body a, the blades being adjusted by a single central screwed member c, which is locked after adjustment by a feathered serrated ring d and a lock-nut e.
Patent GB-1165843-A (GB)
Title: Improvements in Headboards
Inventor: STOCKTON JOHN HENRY
IPC: A47C19/02
Filed: 1967-06-21
Abstract: 1,165,843. Securing upholstery. STOCKTON BROS. (HEADBOARDS) Ltd. 20 June, 1968 [21 June, 1967], No. 28570/67. Heading A4M. A bed headboard includes a rigid base B with a groove b in which are stapled the edges of covers for padding a, a<SP>1</SP> overlying adjacent areas of the base B, the groove b being fitted with a slot c overlying these edges and the covers being secured to the periphery of the base. The groove b extends longitudinally of the headboard and further grooves b may extend transversely. The upper padding layer a is thicker and more resilient than the remainder of the padding.
Patent GB-310739-A (GB)
Title: Improvements relating to intermittent absorption refrigerating apparatus
IPC: F25B17/00
Filed: 1928-10-05
Abstract: 310,739. Boving, J. O. Oct. 5, 1928. Refrigerating, absorption machines for; refrigerators, domestic and like. - The rate of evaporation of the liquid refrigerant stored in the evaporator b of an absorption refrigerating machine of the neversing type is regulated by controlling, preferably by a thermostatically-controlled flap e, the circulation of air over the evaporator which is disposed in a constricted space in the refrigerator a.
Patent GB-445302-A (GB)
Title: Press for the extraction of juices from exhausted sugar beet cossettes, fresh cossettes and other air containing substances
IPC: C13B15/00
Filed: 1934-10-06
Abstract: 445,302. Extracting sugar and other juices. MAANEN, D. H. J. VAN, 37, Avenue Marie-JosÚ, Berchem, Antwerp, Belgium. Oct. 6, 1934, No. 28668. Convention date, Dec. 21, 1933. Addition to 445,293. [Class 127] [See also Group I] Relates to presses for carrying out the process of extraction of sugar and other juices described in the parent Specification. In a press of the Selweg type comprising two slightly conical discs rotated on axes slightly inclined to the horizontal, one disc is provided with electric heating elements or with chambers 20, Fig. 2, to receive steam, and the filtering surface having fine slots is supported on perforated plates 21 which are themselves supported by radial ribs 22 interrupted to form transverse passages. The other disc is not provided with filters and has cooling ribs on its outer side. In a press of the Klusemann type, the material is pressed between a rotating hollow tapering shaft 36, Fig. 4, having helical pressing blades, and cooled by water or other medium, and a cylindrical filtering surface 29 supported by a perforated plate 28 on ribs 27 attached to a cylinder 26 provided with a hot water jacket. Air-discharge openings 34 and passages 33 and downwardly inclined annular rings 35 are provided.
Patent GB-842744-A (GB)
Title: Improvements relating to digital computers
Inventor: QUARMBY ERIC
IPC: G06F9/318
Filed: 1957-09-11
Abstract: 842,744. Programming arrangements for computors. METROPOLITAN-VICKERS ELECTRICAL CO. Ltd. Nov. 11, 1958 [Sept. 11, 1957], No. 28670/57. Class 106 (1). A digital computor has a function matrix 20 for decoding the instructions received from the computor's store and furnishing a pulse on any of a number of output channels according to which function is required, and has connected to these outputs a plurality of sets of staticisers adapted to be connected to the function matrix in a recurring sequence. As shown, two sets of staticizers 34 to 38, 45 to 49, are connected to the function matrix through AND gates 25 to 29, 40 to 44, respectively. The change-over from one set of staticizers to the other is controlled by a bi-stable circuit, comprising twostate devices 31 and 32 operated by pulses on the set line 21, operating gates 22 and 23 in conjunction with pulses from the function matrix. Staticizer 31 controls gate 30 which connects the gates 25 to 29 with the set line and staticizer 32 controls gate 39 connecting gates 40 to 44 with the set line. Staticizer 33 operates with both sets of staticizers.
Patent GB-786071-A (GB)
Title: Improvements in or relating to speed regulating systems for direct-current electric motors and rotary convertors
IPC: H02P7/30
Filed: 1954-10-06
Abstract: 786,071. Control of D.C. motors. MACKIE & CO., Ltd., W., and MUNNS, S. A. Sept. 28, 1955 [Oct. 6, 1954], No. 28775/54. Class 38 (3). [Also in Group XXXV] In a speed control system for a D.C. motor or a motor-alternator set, an A.C. voltage of frequency proportional to speed is applied to two separate frequency-responsive circuits having characteristics of different slope at a frequency corresponding to the desired speed, and a D.C. control voltage depending on the relative magnitudes of the rectified outputs of these circuits is applied to a magnetic amplifier whose A.C. output is rectified for application to a field of the motor whereby to control its speed. As shown, an A.C. voltage derived from an alternator 13 driven by the motor 10 is applied over a transformer 19 to separate frequency responsive circuits 22, 25 whose characteristics have slopes of opposite sign at a frequency corresponding to the desired speed. The rectified outputs of these circuits are applied respectively across adjustable resistors 24, 27 forming adjacent arms of a bridge network comprising also a tapped potentiometer 28, whereby the bridge output to a control winding 35 of the first stage 36 of a magnetic amplifier 34 is of a sense and magnitude representative of the speed deviation from a value set by the tapping on potentiometer 28. The amplifier comprises also a second stage 44 fed in parallel with the first stage from an A.C. source 40 which may comprise the alternator 13, the rectified output of the first stage being applied to the control winding 43 for the second stage and the rectified output of the second stage being applied to an auxiliary motor field 47 connected to aid or oppose the main field 11, whereby the motor speed is restored to the value set on potentiometer 28. A bias winding 50 for first amplifier stage 36 is energized by the rectified output of this stage to provide also a degree of positive feedback. A negative feedback winding 52 for the first stage is energized over a condenser 53 in response to any A.C. component in the rectified output to field 47. In modifications, Figs. 3, 5 (not shown), the frequency responsive circuits comprise pairs of series or parallel resonant circuits tuned above and below the desired frequency. The rectified amplifier output may be applied in series with that from a D.C. source to a single field for the motor.
Patent GB-713835-A (GB)
Title: Improvements in or relating to apparatus for feeding cut tobacco
IPC: A24C5/39
Filed: 1950-11-24
Abstract: 713,835. Feeding tobacco. MOLINS, D. W. RUAU, F. F., and MOLINS MACHINE CO., Ltd. Nov. 21. 1951 [Nov. 24, 1950], No. 28803/50. Class 130 A picker roller 2, positioned below the axis of its feed roller 1 which delivers cut tobacco as from a hopper (not shown), has beneath it guide means such as a concave 6 extending close to the free ends of the picker teeth and under the picking position and having a curved surface with an edge adjacent the surface of the roller 1 so as to intercept shorts falling from the picked tobacco and direct both shorts and picked tobacco towards a winnowing roller 7 having vanes which impel them in a desired direction. In a modification, the concave 6 and guides 6a, 6b thereon are replaced by a vaned impeller 16 and a concave 13 together acting as the guide means. As shown, heavier tobacco portions such as stalks pass finally into a box 11 and the other tobacco into a filler-forming trough 10. A spring comb 4 is provided at the picking position and a roller 14 assists discharge to the trough 10. Shorts passing between the guide means and the roller 1 are collected in a guide 12 for re - distribution among the fed tobacco. Specification 520,178 is referred to.