baber/WOPTO huggingface dataset:
Patent GB-576694-A (GB)
Title: A new or improved step ladder
IPC: E06C1/16
Filed: 1944-03-29
Abstract: 576,694. Step-ladders. BISHOP, W. H. March 29, 1944, No. 5828. [Class 20 (ii)] In a folding step-ladder comprising a platform a, a ladder f, a support e and stays p, the platform a, when the ladder is erected, is spaced vertically from a hinge h which connects it to the ladder j and the top of the ladder engages the underside of the platform on both sides of a vertical plane through the hinge. The ladder is folded by raising the front edge of the platform. The corner n is rounded off to clear the platform when folding. The ladder is made of welded sheet metal pressings. A locker may be arranged under the bottom step. A hand hole may be provided near the front edge of the platform.
Patent GB-591065-A (GB)
Title: Mechanism for converting rotary motion into reciprocating motion
IPC: F16H25/12
Filed: 1945-03-08
Abstract: 591,065. Converting rotary motion into reciprocating motion. KINGCLIFFE ENGINEERING CO., Ltd., O'ROURKE, F. O'ROURKE, F. K. M., and WATSON, L. W. March 8, 1945, No. 5831. [Class 80 (iii)] Mechanism for converting rotary motion into reciprocating motion comprises a rotatable shaft 1 with intersecting right and left handed threads 2, 3, engaged by a member 19, rotatably carried by a non-rotatable traveller 16, which reciprocates as the shaft 1 rotates. The traveller on arriving at the end of its stroke, engages on a collar 8, and forces it back against the action of a spring 10, until the member 19 enters an enlarged part 22 of the thread, where it leaves thread 2 and enters thread 3. A similar action takes place at the other end of the stroke. The stroke of the traveller 16 may be made adjustable by providing in addition to the collars 8 adjustable stops 47, 48 which withdraw the thread engaging member 37, Fig. 6, from one thread 2 and re-engage it with the other thread 3. When the traveller reaches stop 48, the member 37 is lifted by a cam 43 on the shaft 35, 36 of the member 37 riding up a ramp 52. When the member 37 is free of the thread 2, the cam 43 abuts a spring-loaded plunger 53, and is rotated until stopped by a pin having lost motion in a recess in a plug 40. The member is then forced down into the other thread 3 by a spring 39. A similar action takes place at the other stop 47; in this case a cam 44, at right angles to the cam 43, rises up a ramp 55 and engages a spring-loaded plunger 56 to move the member 37 from thread 3 to thread 2.
Patent GB-1235482-A (GB)
Title: Improvements in or relating to electromagnetic flowmeters
Inventor: TUCKER MALCOLM JOHN
IPC: G01P5/08
Filed: 1968-02-06
Abstract: 1,235,482. Electromagnetic flowmeters. NATIONAL RESEARCH DEVELOPMENT CORP. Feb.28, 1969 [Feb.6, 1968], No.5855/68. Heading G1N. An electromagnetic flowmeter comprises a centre-tapped coil 1, the ends A, B of which are alternately connected by a transistor switching circuit 4 to a direct current source 3 to generate a magnetic field alternately in two opposite directions, and a pair of electrodes 2 connected through a sampling switch 6 to alternate inputs of a differential amplifier 9. The sampling switch 6 is closed by a pulse from a delayed pulse generator 7 or 8 at a time interval after each reversal of the magnetic field to allow steady state conditions to be reached. For use as a ship's log, the coil is mounted with its axis vertical. A second pair of electrodes may be provided to enable the sideways and fore-and-aft components to be measured.
Patent GB-1008065-A (GB)
Title: Improvements in friction roller mills
IPC: B02C4/28
Filed: 1963-02-14
Abstract: 1,008,065. Roller mills. GEB. BUHLER. Feb. 14, 1963 [Feb. 15, 1962], No. 6024/63. Heading B2A. A roller mill for processing chocolate or paint has an electrically-operative sensing device 10 for detecting idle running of the rolls. The device can be adapted either to disengage or stop rotation of the rolls or control the feed. The presence of a layer of material on one of the rollers, preferably the upper roll 7, is detected by a capacitative probe or by means of light reflected from the layer and used to operate a light sensitive element when there is lack of material on the roll ; alternatively, the layer, if of magnetizable material, can serve as an air gap and be used with an electromagnetic sensing device. Several electrical circuits for the sensing device are described. The sensing device, on detecting absence of a layer of material on the roll, is arranged to control the mill through a time delay which prevents stoppage during brief periods when the rolls are not covered with material. Several sensing devices may be distributed over the length ol the roll, or alternatively, one device arranged to traverse the roll by means of a leadscrew 11 driven by a motor which is reversed by a mechanically- or electronically-operated trip. In the mill shown, rolls 3, 4 pick up material from a tank 12 and convey it to the rolls 5, 6, 7 which operate at different speeds, a scraper 107 being provided on the last roll. Material is fed to the tank by a pump 103 which is arranged to be started by the sensing device 10 and stopped by a level-responsive device 106 in the tank. If insufficient material is fed into the tank in a predetermined time, the rolls are stopped or disengaged and an alarm 110 sounded.
Patent GB-407188-A (GB)
Title: Improvements in and relating to vacuum cleaning devices
IPC: A47L5/12
Filed: 1933-02-28
Abstract: 407,188. Vacuum cleaners. SCHMID C., 13, Meiningenallee, Charlottenburg, Berlin. Feb. 28, 1933, No. 6160. Convention date, Feb. 29, 1932. [Class 8 (i).] The suction in the inlet pipe 1 of a vehicle motor is caused to reciprocate a piston 19 connected with a piston 16 which latter draws dusty air through a nozzle 8, filter 13, and valve 15, and discharges the cleanud air through ports 25 controlled by a valve 17 in the piston to a chamber 11 open to atmosphere by ports 18. The downward motion of the piston 19 pushes a control piston 22 down to close the passage 5 leading to the motor inlet and to open the mouth of a pipe 23 relieving the accumulation of air in the chamber 9 at intervals. Diaphragms may be substituted for the pistons 16, 19.
Patent GB-634660-A (GB)
Title: Improvements in or relating to electrical control devices
IPC: G05B1/02
Filed: 1947-03-04
Abstract: 634,660. Automatic temperature control systems. SANGAMO WESTON, Ltd. March 4, 1947, No. 6176. Convention date, June 21, 1946. [Class 38 (iv)] [Also in Group XXXVII] In an electric relay control apparatus, variations between two limits of applied current are made to effect the energization or de-energization of a load circuit. Separate relays 2, 3, Fig. 1, corresponding to the " low " and " high '' limits of regulation are employed for controlling a circuit 32, 33 which may control the power supply to a furnace. The " low " relay 2 comprises a moving coil 4 carrying an arm 5 having an iron rider 6 which co-operates with a magnetized contact 7, the " high " relay 3 being provided with similar parts 4<1>-7<1>. When the " high " limit is reached relay 3 closes contacts 61, 71 which are then held locked magnetically. The control circuit 32, 33 is thereby closed and a solenoid 14 energized to reset, by means of bell-crank levers; the " low relay 2, and operate a transfer switch 16 by moving an arm 17 from contact 19<1> to 19, both of which ara magnetized to hold a contact 20 in its set position. Thereafter, if the low limit is reached the relay 2 is operated in a similar manner and the relay 3 reset to open the control circuit 32, 33. Both relays are enclosed in single case 1. In a modification (Fig. 2, not shown), separate relays in different cases are employed, the transfer switch being outside the casings and operated by a separate auxiliary relay, energization of which is controlled in accordance with movement of the instrument pointers. In a further embodiment, Fig. 3, a single pointer 61 operates between fixed contacts 63, 63<1>, and the resetting mechanism com prises aT-arm 64, operated by solenoids 69, 69<1> and bell-crank armatures 70, 70<1>. In this embodiment the pointer is reset immediately after making the " high " or " low " contact. Specifications 429,177, 432,100 and 440,665, [all in Group XXXVII], are referred to.
Patent GB-491253-A (GB)
Title: Improvements in collapsible chairs
IPC: A47C4/38
Filed: 1937-03-02
Abstract: 491,253. Folding chairs. COLLIER, G. D. March 2, 1937, No. 6212. [Class 52 (ii)] An X-frame chair of the kind wherein the back frame c is pivoted intermediate its ends to the upper end of one of the X-frames, has its parts dimensioned and pivoted in such fashion that the X-frame members a, b fold flat and lie within the periphery of the back frame c.
Patent GB-1090934-A (GB)
Title: Internally lined arc-control device for high-voltage circuit-breakers
IPC: H01H33/72
Filed: 1966-02-11
Abstract: 1,090,934. Gas-blast switches. FABRIEK VAN ELECTRISCHE APPARATEN VOORHEEN F. HAZEMEIJER & CO. N.V. Feb. 11, 1966 [Feb. 12, 1965], No. 6217/66. Heading H2B. The lining of an arc-control device of a circuit-breaker consists of polycarbonate, polymethylmethacrylate, and/or polyamide, rendered opaque, preferably by the inclusion of 0À1 to 5% of carbon black. Reference is made to the fact that the lining is gas-evolving.
Patent GB-511975-A (GB)
Title: Improvements in and relating to driving members for lathes
IPC: B23B31/12
Filed: 1938-02-28
Abstract: 511,975. Lathe centres and drivers. FORKARDT, R. Feb 28, 1938, No. 6309. Convention date, Feb. 27, 1937. [Class 83 iii)] A lathe driver for turning work between centres having a pair of clamping jaws 2a actuated by means passing through the spindle has the jaws secured to pins 21 on spiral wheels 21a engaging corresponding spiral teeth on a non-rotating piston member 23 which is moved axially to open and close the jaws. The pins 21 are mounted in a slide 19 which has slight floating movement in the body 1 to relieve the centre 3 from lateral strains. The piston member may be spring urged in the closing direction and has straight teeth 24 coacting with a pin 25. To adjust the jaws the pin 25 is withdrawn and the jaws rotated in unison by means of a hexagonal key inserted in a socket in one of the pins 21. In a modification, Fig. 3, the centre may have axial movement. In this form the piston member 23 is guided in a bush 28 and the centre 3a is urged forwardly by a spring 29 against a stop ring 30 which serves as a work abutment. The rear part of the piston member also encloses a spring 31 which applies pressure to the stamping collet 32. During the forward clamping movement of the piston member 23, the centre has the additional support of the stamping pressure exerted by the collet. On the return stroke of the piston member a shoulder 33 causes positive withdrawal of the collet and unclamping of the centre. Specification 463,227 is referred to:
Patent GB-667641-A (GB)
Title: Improvements relating to dredging tin ore and other minerals
IPC: E02F7/06
Filed: 1950-03-14
Abstract: 667,641. Excavating earth. KELMAN, A. J., MALAYAN TIN DREDGING, Ltd., SOUTHERN MALAYAN TIN DREDGING, Ltd., TRONOH MINES, Ltd., SOUTHERN TRONOH TIN DREDGING, Ltd., and AYER HITAM TIN DREDGING, Ltd. March 14, 1950. No. 6389/50. Class 68 (i). An installation for mining alluvial deposits comprises a pontoon 1 on which is mounted a mooring winch 2 that traverses the pontoon at a rate which synchronises with the mean rate of digging of a grab or grabs 6 suspended from the jibs 5 of the level luffiing non slewing type at the prow of the pontoon. Also mounted on the pontoon are the winches 8 for operating each grab, a common hopper 12 receiving the alluvial from the hoppers 10 beneath each jib and a mineral treatment apparatus to which the alluvial is conveyed by a feed conveyer 13 and an upwardly inclined screening conveyer 14. The mineral treatment apparatus comprises a revolving screen 15 on the fore-and-aft axis of the pontoon, the screen having a stone discharge shoot 17 and two sets of concentrators 16 arranged symmetrically in relation to the revolving screen and tailing shoots 18 extending rearwardly from said sets of concentrators over the stem of the pontoon.
Patent GB-117471-A (GB)
Title: Improvements in Domestic Ranges.
Inventor: FLORENCE ARTHUR PETRIE
IPC: F24C13/00
Filed: 1917-05-05
Abstract: 117,471. Florence, A. P. May 5, 1917. Cooking - ranges. - In a modification of the range described in Specification 13337/15, the fire is arranged between the oven d and the boiler c, which is heated by combustion products on the top, bottom, and both sides. In the arrangement shown in Fig. 1, the gases pass away by a flue i containing a baffle or damper i<1>, and thence by a flue p<3> to the outlet flue at the other side of the stove. In a modification, Fig. 2, the cutlet flue b is at the same side of the stove as the boiler c, and the oven flue gases after passing over and under the oven d, pass under the ash-pit to the outlet flue, and are there joined by the gases flowing round the boiler. The boiler is divided by a midfeather or partition c<3>, extending along the greater part of its length, which ensures the circulation of water round both sides of the boiler.
Patent GB-693907-A (GB)
Title: A percussion safety firing device for automatic guns
IPC: F41A3/40
Filed: 1950-03-15
Abstract: 693,907. Automatic guns. SOC. ITALIANA E. BREDA PER COSTRUZIONI MECCANICHE. March 15, 1950 [March 17, 1949], No. 6465/50. Class 119 The sliding breech bolt 3 of an automatic gun has pivoted thereto a locking block 1 which in unlocked position precludes firing, the block having an elongated slot to receive the pivot pin 2 to provide a sliding movement as well as a pivotal movement during the locking and unlocking operation. The invention is shown in one form, Fig. 2, applied to a long-recoil breech action. The breech bolt 3 slides in an extension a of the barrel b and has a pin 2 engaging an elongated slot in a locking-block 1, a projection 1a on which locks with a recess a<SP>1</SP> in the barrel-extension when the breech is closed. The block is urged to closed position by a spring- pressed rod 5 pivoted at 4 to the block. The block has slidable therein a firing rod 10 intermediate between a hammer 9 and striker 11. On firing, the locked barrel and breech bolt recoil fully to the rear and on runout the locking block is engaged by a tooth 7 to swing it downwardly to the unlocking position shown and the barrel returns alone causing the empty cartridge case to be extracted. The block is retained by a lever 17, Fig. 3, until the barrel returns when lever 17 is released by incline 20, and the tooth 7 is actuated to release the breech bolt to load a fresh cartridge, the locking block finally rising to locking position. Safety is provided since, in the unlocked position of the bolt, the firing rod 10 is out of line with the striker 11. For hand working, the locking block is operated directly by a handle 8 which after tilting the block moves the breech bolt rearwards. The handle may be replaced by a hand-operated slide which carries a projection engaging a projection on the block. In a modification, Fig. 6, the striker 24 slides as a whole in the breech bolt and the rocking of the block to unlocking position causes a surface 26 thereon to engage a projection 25 on the striker to block its firing movement.
Patent GB-1456931-A (GB)
Title: Decorative laminates
IPC: B44F1/04
Filed: 1974-02-13
Abstract: 1456931 Embossed laminated picture W M SWARTZ 13 Feb 1974 [20 Feb 1973] 06487/74 Headings B5N and B5P [Also in Divisions B6 and G5] A picture is produced by printing a design on top of the mirror-like metallic surface of an Al. foil 3 laminated to a paper backing 2 by an adhesive 4, the surface being treated so as to be ink receptive by the application of a lacquer film 6. The design is printed, in part, in translucent ink, and the backing 2 is laminated to a fibreboard backing, the resulting laminate being embossed in register with the design. A layer 8 may colour the mirror-like surface, and the design applied to this layer before a polyethylene, methacrylate or polyester transparent lacquer top coat is applied. Selective areas of the top coat may bear a dulling agent. The fibre board may have an Al. foil coated back or the backings 2 of two pictures may be laminated to opposite surfaces of the same fibreboard before embossing. The design is composed by four colour-separated designs printed by lithography in translucent and opaque inks.
Patent GB-752818-A (GB)
Title: Improvements in or relating to powder couplings
IPC: F16D37/00
Filed: 1954-03-05
Abstract: 752,818. Powder clutches. SOC. MEDITERRANEENNE MINIERE METALLURGIQUE ET COMMERCIALE. March 5, 1954 [March 9, 1953], No. 6530/54. Class 80(2) A centrifugal powder coupling between two shafts 1, 2, either one of which may be the driving shaft, comprises a two-part casing 3 of lenticular shape integral with or connected to the shaft 1, said casing containing a quantity of metallic powder and enclosing a rotor 9 which is carried by the shaft 2 and is of annular or disc form. having a plurality of radial undulations 9a or other deformations around its periphery, the amplitude of the undulations increasing outwardly of the rotor so that as the speed of rotation increases the powder is compacted into a number of approximately triangular prisms 15 adjacent the crests of the undulations and readily becomes decompressed as rotation ceases. A ball race 7 is provided between the shaft 2 and casing 3. The metallic powder is introduced through a stopper in the casing and is prevented from escaping by felt rings 14. It is stated that the coupling may act as a torque-limiting device, since excessive torque will break down the prisms 15. In a modification, a central partition divides the casing into two equal parts, each of which encloses a ring-like rotor, both rings being connected to the shaft 2. Specification 697,557 is referred to.
Patent GB-690800-A (GB)
Title: Improvements in or relating to gas-turbine power plants
Inventor: CORBITT ROBERT WILLIAM
IPC: F02C7/08
Filed: 1949-03-10
Abstract: 690,800. Gas turbine plant. ROLLS-ROYCE, Ltd. April 21, 1950 [March 10, 1949], No. 6599/49. Class 110(iii) [Also in Group XXIX] In a gas turbine plant having a heat exchanger in which the turbine exhaust heats the compressor delivery, the heat exchanger may be by-passed on the gas-side. As shown, Fig. 1, the propeller 22 is driven by turbine 20 which is supplied with air by the L.P. and H.P. compressors 10, 12, respectively driven by turbines 14, 16. After compression the air is heated by the turbine exhaust gases in the heat exchanger 17 which contains hinged gates 28, 29, Fig. 6, controlled by the manual throttle handle, and adapted to adjust the flow of exhaust gases through the exchanger. The pump 31 is rotated at a speed proportional to that of the plant and supplies fuel to the injector 42 through the throttle 38 manually set by 63. The fuel flow is maintained at the set value by adjustment of the pump bleedvalve 48 by the bellows 58, 59, 60 sensitive to the pressure difference developed across the throttle. The engine top speed is limited by a second bleed-valve 102 operated by the diaphragm 100 which is positioned by the pressure developed by the rotor pump 32. The manual adjustment of 28, 29 is effected through the servomotor 77, 80 controlled by valve 75 which is positioned by the trellows 65 in which the space 67 is connected to the compressor delivery. The ambient temperature changes which are accompanied by variations in the delivery pressure of the H.P. compressor are corrected for by the bellows 90 adapted to operate the bleeder 48 through the flexible diaphragm 50 in response to delivery pressure changes detected in chamber 94.
Patent GB-1417456-A (GB)
Title: Button assembly
IPC: A44B1/28
Filed: 1973-02-12
Abstract: 1417456 Button assembly D M SALVATORI 12 Feb 1973 6728/73 Heading A3H A button assembly comprises a button holder 12 having a base with a continuous curved twined edge to grip garment materials and a centre stem 22 having a point 24 and a button 14 having a central bore 34 to accommodate stem 22, a flowable adhesive 56 covered by a puncturable sealing material 54 being provided in the bore 34 to be punctured by the stem 22 of the button holder 12 upon fastening the button assembly to the garment material. A decorative cap 38 may be adhesively secured or spring-biased into position.
Patent GB-567889-A (GB)
Title: Improvements in or relating to devices comprising electric discharge tubes
IPC: H01J21/02
Filed: 1943-04-29
Abstract: 567,889. Electric discharge apparatus. PHILIPS LAMPS, Ltd. (Naamlooze Vennootschap Philips' Gloeilampenfabrieken). April 29, 1943, No. 6798. [Class 39 (i)] To improve the mutual conductance of a valve having a cathode 1, a control grid 4 maintained at low voltage and an anode (not shown) exterior of the control grid, grids 2, 3 at a higher potential than the control grid and having turns aligned with each other and with those of the control grid are arranged between the latter and the cathode to focus the electrons so that they pass centrally between the turns of the control grid. Further grids may be arranged between the control grid and anode.
Patent GB-416271-A (GB)
Title: Improvements relating to centreless grinding machines
IPC: B24B5/35
Filed: 1934-03-03
Abstract: 416,271. Centreless grinding-machines. CHURCHILL MACHINE TOOL CO., Ltd., and LONGTHORPE, H., Broadheath, near Manchester. March 3, 1934, No. 6863 [Class 60.] In a centreless grinding-machine of the through-feed type, the work d is supported on a blade c mounted so as to be adjustable simultaneously vertically and laterally so that different sizes of work mav all make contact with the regulating-wheel b along a line at a predetermined height. The blade c is mounted in a support g pivoted at f to a fixed rest e, and is adjustable, to an extent indicated by a scale and pointer, &c., by the eccentric end piece j of a stud i rotatably mounted in the rest e and engaging a slot k in the support g ; a bolt m in a curved slot n serves to lock the support g in adjusted position. The rest e carries guide bars or rollers e<1> for the work and the support g carries guides h. In a modification, the support g is mounted on an inclined track and is movable thereon by a rack and pinion. Specification 308,874, [Class 60], is referred to.