baber/WOPTO huggingface dataset:
Patent GB-1348311-A (GB)
Title: Light flux comparing circuit particularly for reflex cameras
IPC: G03B7/083
Filed: 1971-05-28
Abstract: 1348311 Photo-electric measurement ASAHI KOGAKU KOGYO KK 28 May 1971 [28 May 1970] 17946/71 Heading G1A [Also in Division G2] In an arrangement for comparing two light fluxes one is sensed by a photo-sensor and stored and the other is measured by the same photo sensor and the signal resulting from the latter is supplied with the stored signal to a subtracting circuit. The arrangement is applied to measuring the illumination of a field in the presence of light incident on the sensor from a second field particularly in through-the-lens metering for a reflex camera where an error is introduced into the measure of light through the lens by light through the eyepiece. A switch SW1, Fig.2, operative in conjunction with retraction of the mirror supplies initially a voltage V1 corresponding to the light through the objective and eyepiece as measured by diode D to a capacitor C1 and on change over when the mirror has retracted connects the output of diode D through contact b to the subtracting circuit comprising complementary PNP and NPN transistors Q 2  Q 3  to which the capacitor is also connected through an FET Q 1 . Logarithmic compensation of the subtractor output is introduced by a diode D1, and a film speed parameter is introduced by a potentiometer R F ASA, the shutter being controlled by a solenoid M. A number of alternative embodiments using photo-voltaic or photo-conductive sensors and single throw or change-over switches are described and the achievment of linearity by coupling the sensor into a low-impedance amplifier is included.
Patent GB-186435-A (GB)
Title: Improvements in and relating to the propulsion of cycles
IPC: B62M1/18
Filed: 1921-07-02
Abstract: 186,435. Mitchell, G. W. July 2, 1921. Weight of rider, propelling by.-The saddle support p of a pedal cycle slides in the saddle pillar against the action of a spring s<2>, which presses a thrust ball-bearing b against one or more collars a. A spring s<1> attached to the spring s<2> is secured to a lever l<1> which operates levers l<2>, l<3>, the lever l<1> being pivoted at k to the rear fork. One end of the lever l<3> is attached to a spring s<3> secured to the frame, and the other end carries a driving-chain c, which passes around the free-wheel d and is attached by a wire w to the saddle support p.
Patent GB-577377-A (GB)
Title: Improvements relating to stays for angularly-movable vehicle-windshield panels, and other angularly-movable panels
IPC: E05C17/26
Filed: 1944-09-21
Abstract: 577,377. Stays. WORCESTER WINDSHIELDS & CASEMENTS, Ltd., and JONES. A. E. E. Sept. 21, 1944, No. 18001. [Class 65 (i)] A stay, particularly for a vehicle windscreen, which is pivoted at one end, with means for holding it in various positions, has at the other end a pair of rollers engaging opposite sides of a bar carriec by the moving member. In the form shown the bar 14 is formed of sheet metal and the rollers 11, which are grooved to fit the bar, are carried by a member 9 pivoted to the stay-bar 2 so that they engage the bar closely without binding in any position. The rollers may be of metal, fibre, or rubb er and may be mounted on flexible sleeves.
Patent GB-404977-A (GB)
Title: Improvements in or relating to magnetic talking machines
IPC: G11B5/00
Filed: 1932-06-25
Abstract: 404,977. Recording and reproducing music. HEISING, K. VON, 20, Manor Drive, Mill Hill, Middlesex. June 25, 1932, No. 18016. [Class 40 (iv).] In a recording and reproducing system using a magnetized tape or wire, filters are used in the recording and.reproducing amplifiers or elsewhere in the circuits so that, in recording, the higher frequencies are emphasized while, in reproducing, the lower frequencies are emphasized. This compensates for losses at lower and higher frequencies inherent to the system, and reduces the relative noise level. In the recording amplifier, Fig. 4, the inter-valve coupling condensers are of low value (.0005 mf.) to attenuate low frequencies, but the grid leak at the third valve has a high frequency shunt comprising a resistance and capacity (.02 mf.) in series in order that some low frequency response may be retained. In the reproducing amplifier, Fig. 5, the couplings comprise a condenser (.1 mf.) in series with a small condenser (.0005 mf.) which is shunted by a resistance. This combination attenuates frequencies at both ends of the range, but the higher frequencies are, in addition, attenuated by grid leaks similar to that employed in Fig. 4.
Patent GB-1502990-A (GB)
Title: Electronic device for monitoring weft yarn insertion in looms
IPC: D03D51/00
Filed: 1975-04-30
Abstract: 1502990 Stop motions, shuttleless looms R O J ELECTROTEX SpA 30 April 1975 [30 April 1974] 18063/75 Heading DIE A weft selection shuttleless loom has an electronic device for monitoring the weft that produces a stop signal upon defective weft insertion or when more than a desired number of wefts are inserted in one shed. Each weft is monitored separately by e.g. a piezoelectric device and the signal is fed from the device to a transducer and to a logic network which compares the signal with a predetermined programme which is arranged to produce a stop signal if more or less than the required number of tranducers have been activated.
Patent GB-545943-A (GB)
Title: Improvements in aircraft alighting gear
IPC: B64C25/20
Filed: 1940-12-23
Abstract: 545,943. Retractable undercarriages for aircraft. DOWTY EQUIPMENT, Ltd., and SMITH, H. H: Dec. 23, 1940, No. 18066. [Class 4] A retractable undercarriage for aircraft is connected to a steering column when extended and disconnected therefrom when retracted, means operative during retraction ensuring first the centralization of the landing element and afterwards causing it to turn about its steering axis for nesting within the stowage space. The connection and disconnection can take place irrespective of the position of the steering column which is coupled to the rudder bar. A leg 24 is trunnioned to the aircraft structure and is extended and retracted by a breakable strut 27, 28 actuated by a jack 30. Extending through the leg 24 is a member having a forked extension 12 to which is pivoted a pair of levers 14 carrying a landing wheel elastically controlled by a shock absorber 19. The upper end of this member has a head 20 having two. projecting pins 21, 23. The rear pin 21 engages an open groove 8 in a member 7 carried by a steering column 4 which is in alignment with the leg 24 when the latter is extended. As the leg is retracted the pin 21 approaches the axis of the steering column and as it reaches it the pin 23 enters a guide slot 22 carried on the aircraft. This slot is inclined transversely so as to cause the wheel to turn through a right angle as retraction is completed. According to the Provisional Specification the guide slot 22 may be vertical in which case the landing element is retained in a fore and aft plane when retracted.
Patent GB-152774-A (GB)
Title: Improvements in locking devices for the steering gear of motor and the like vehicles
IPC: B60R25/021
Filed: 1919-07-21
Abstract: 152,774. Cattle, A. J., and Macrae, R. S. July 21, 1919. Guarding against unauthorized use.-The steering-shaft may be locked to the steering-column when the vehicle is to be left unattended, by a bolt acted upon through an intermediate spring by a barrel lock, means being also provided to break or earth the ignition circuit when the bolt is operated. A casing comprising two cylinders 1, 3, welded or otherwise secured together is fixed upon the steering-column 2. The cylinder 3 carries a lock 25 of which the rotary head 26 is connected by a spring 39 through a lost-motion device to a pinion 35 gearing with a rack on the sliding bolt 42. When the lock is operated, the spring 39 is wound up and the bolt is moved when apertures in the steering-column and shaft 10 coineide. Spring-pressed insulated pins 51, 51<1> are respectively connected to the accumulator and magneto systems, when both are fitted; in the unlocked position shown, the pin 51 is earthed by the bolt, and the pin 51<1> is insulated, both ignition circuits being operative. When the bolt is moved to the locking position, the pin 51 is insulated and the pin 51' is earthed, both ignition systems being put out of action. Two modifications are described in which the head 26 of the lock acts on the spring and the bolt (1) through a screw-thread, the lock and bolt being insulated and connected to the ignition circuit which is earthed when the bolt contacts with the steering column, and (2) through a crank-pin and an arcuate slot, the pin coming in contact with a spring to earth the circuit when the lock is operated.
Patent GB-702232-A (GB)
Title: Improvements in or relating to methods and apparatus for making branched pipe fittings
Inventor: STANTON CHARLES BERNARD
IPC: B21C37/29
Filed: 1951-08-01
Abstract: 702,232. Making pipe fittings. IMPERIAL CHEMICAL INDUSTRIES, Ltd. July 30, 1952 [Aug. 1, 1951], No. 18207/51. Addition to 700,855. Classes 83 (2) and 83 (4) A method of forming a branched pipe fitting as described in the parent Specification is modified in that the portion of said blank not in contact with the wall of the main die cavity is supported throughout the-forming operation by a hydraulically-actuated plunger. The operation and apparatus fully described in the parent Specification is modified in that the support member 7 which slides in the branch cavity 8 is actuated by a hydraulic plunger 9 through a connecting rod 10. The plunger operates in a cylinder 11 to which pressure fluid is supplied from a pipe line 12 and one-way valve 13. A relief valve 14 ensures that there is a pressure difference between the fluid pressure to the support member and the pressure exerted by the hydraulic fluid within the tubular blank. In a modification (Fig. 2) the hydraulic fluid for both the forming and the backing-up process is supplied from a common source. A pipe line 16, 17 and 24 delivers pressure fluid to cylinders 18a and 18b to operate pistons 19a and 19b integral with the plungers 20a and 20b respectively. A channel 21 in the plungers 20a supplies the pressure fluid to the interior of the tubular blank from which it passes through a passage 23 in the plunger 20b the outflow being controlled by a pressure relief valve (not shown). The pressure fluid also supplies a cylinder 26 where it actuates the piston 27 of the support member 28 as previously described. To provide the required pressuredifference the effective area of piston 27 is slightly less than that of each of the pistons 19a and 19b. The plungers 20a and 20b may be mechanically actuated.
Patent GB-678377-A (GB)
Title: Improvements in or relating to apparatus adapted for heating shoes
IPC: H05B3/00
Filed: 1949-07-09
Abstract: 678,377. Drying shoes in manufacture. BRITISH UNITED SHOE MACHINERY CO., Ltd., and SIMMS, E. H. July 10, 1950 [July 9, 1949], No. 18213/49. Class 17 (i). [Also in Groups XI and XIII] An apparatus for heating a coating of adhesive on the margin of the bottom of a shoe preparatory to the attachment of an outsole comprises an open-mesh wire grid 81 which forms a work support on which lasted shoes may be positioned, bottom downwards, and beneath which are placed electric radiant lamps 53 arranged to direct their heat upwards through the grid. The grid 81 forms part of a receptacle 13 supported on a housing 11 adapted to stand on the floor, which receptacle with the grid may be swung upwards, as shown, about hinges 15, to facilitate access to the lamps for cleaning or replacement. Baffle plates 87, 89, 91 prevent glare from emerging from the opening 85 through which the shoes are inserted and louvres 77 prevent escape of glare from the top of the receptacle 13. Each lamp has a circular filament and a silvered reflector surface and the lamps are arranged in two rows set at an angle to one another to direct the heat in different directions. Specifications 408,953 and 543,263 are referred to.
Patent GB-1350636-A (GB)
Title: Rotary piston compressors
IPC: F04C29/00
Filed: 1971-05-28
Abstract: 1350636 Rotary positive-displacement machines AERZENER MASCHINENFABRIK GmbH 28 May 1971 [3 June 1970] 18214/71 Heading F1F In a Roots' compressor a proportion of the compressed gas in an outlet 2 is returned to chamber 8 through auxiliary inlets 14 so as to reduce noise and cool the gas undergoing compression, each of said inlets being located such that a pressure wave generated in the respective chamber 8 whenever this inlet is uncovered by the corresponding piston 3 has time to travel to a main inlet 1 before the latter is cut-off by the piston from the said chamber. Cooling devices 15 are disposed as shown. The angle α may be up to 60 degrees. The compressor may be used as a vacuum pump and the auxiliary inlets may then communicate directly with the atmosphere, Fig. 2 (not shown). A prior machine is described with reference to Fig. 1 (not shown) in which the auxiliary inlets are situated farther from the main inlet.
Patent GB-595863-A (GB)
Title: A die holder for a tailstock spindle
IPC: B23G1/26
Filed: 1945-07-17
Abstract: 595,863. Attachments for screwing. SAROSSY, A. July 17, 1945, No. 18297. (Class 83 (iii)] A die-holder for attachment to a lathe tailstock comprises a die 30 held by screws 27 in a holder 20 with a bore 19 allowing entry of a work-piece 13 and stidably and rotatably engaging a guide bar 16 which has graduations 18 to. indicate the desired movement of the holder, and a tapered shank to engage a socket on the tailstock spindle 40. The portion of the bore allowing entry of the work-piece may be of different diameter from the remainder of the bore. In operation, the tailstock spindle is locked in the required position, the die 30 is engaged with the rotating work-piece, and the knurled portion 24 of the holder is held against rotation until the required length of thread has been cut, as indicated by the graduations 18. To unscrew the die, the rotation of the workpiece is reversed, the holder again being held.
Patent GB-758478-A (GB)
Title: Improvements in cylindrical wire coil screw thread inserts
IPC: F16B37/12
Filed: 1954-06-23
Abstract: 758,478. Screw-sockets. HELI-COIL CORPORATION. June 23, 1954 [July 16, 1953; June 8, 1954], No. 18373(54. Class 89 (1). [Also in Groups XXII and XXIII] A wire-coil, screw-thread insert comprises a cylindrical body 10, Fig. 1, of wire helicallywound about the cylinder axis, the wire at the leading end 15 of the insert being bent to form a grip-end of polygonal form surrounding the body-axis a through more than 180 degrees, to receive a correspondingly shaped tool-shank t whereby the insert is turned and contracted, during insertion in a threaded hole. The end may be triangular,. comprising sides 16 ... 18, Fig. 2, the corners 20, 21 being located on a helix in continuation of the helix of the body, and on diameters smaller than the rootdiameter of the threaded-hole but larger than the crest-diameter thereof. After insertion, the tool is turned in the opposite direction to expand the grip-end as shown in Fig. 3, the sides 16 ... 18 being slightly curved to lock an inserted screw. The grip-end may be square, rectangular or pentagonal comprising arcuate sides 60 ... 63, Fig. 9, and a straight end 64. In a modification, end 64 and part of side 63 are omitted. At least two angles of the polygon are less than 90 degrees.
Patent GB-146417-A (GB)
Title: Piston cooling
IPC: F01P1/04
Filed: 1920-07-02
Abstract: 146,417. Mõdler, F. L. Aug. 4, 1917, [Convention date]. Pistons; pistons, cooling; packing, non- metallic. - Relates to pistons for internal-combustion engines cooled by passing compressed air through, the compressed air being also used to prevent the passage of lubricant &c. As shown in Figs. 1 and 2, air is supplied by a pipe c to a pocket g in the piston, passes through apertures n to the spaces between the ribs k on the cover i, through apertures o to a second pocket h, and thence by the pipe d. Air from the pocket g also enters grooves l, m to prevent the passage of lubricant &c. In a modification, the pistonend i has concentric ribs or flanges instead of the straight ones shown. In a modification shown in Figs. 6 and 8, air from the branch y passes through apertures x into the pocket p and over the piston-end to the pocket wand through the apertures x to the branch z. Air may be passed from the pocket g to the pocket h through the gudgeon-pin to cool it.
Patent GB-733529-A (GB)
Title: Improvements in gas turbine engine fuel supply systems incorporating fuel flow control devices
IPC: F02C7/232
Filed: 1953-07-03
Abstract: 733,529. Gas turbine plant. GENERAL MOTORS CORPORATION. July 3, 1953 [July 24, 1952], No. 18438/53. Class 110 (3). [Also in Group XXIX] The interengaging surfaces of a pair of relatively movable members of a fluid flow control device in a gas turbine fuel system are kept free of particulate material by maintaining a now of finely filtered fluid over them. A pump 10 supplies fuel via a pipe 24 and coarse filter 22 through a rotary-plug cut-off valve 20, a metering piston valve 16 in which the piston 52 is adjusted at 62 manually and in accord with temperature, pressure or speed changes in the gas turbine, and through a spring-loaded plunger valve 106 exposed to inlet and outlet pressures at its respective ends, to the burner nozzles 90, the pump having a by-pass plunger valve 18 maintaining a constant pressure drop across the metering 'valve, the pressure drop being applied across the ends of the -plunger. Fuel taken from the pump outlet at 36 is passed through a fine filter 34 and washes the surface of the plug 30 as it flows from a chamber 40 round the plug into the main stream 44. In the metering valve fuel flows via passage 58, filter 56, passages 50 and over the housing and piston valve surfaces back into the main stream 46. The surface of the actuating piston 72 of the by-pass valve is similarly washed by fuel passing filter 84 and passage 82. In the nozzle valve 106, the filter 100 is carried in the valve member and washes its actuating plunger 96 via passages 102.
Patent GB-454680-A (GB)
Title: Combustion chamber for internal combustion engines using liquid fuel
IPC: F02B19/08
Filed: 1935-06-27
Abstract: 454,680. Oil engines. OBRAM, N., 19, Quai Jordaens, Antwerp, Belgium. June 27, 1935, No. 18476. Convention date, June 28, 1934. Addition to 385,020. [Class 7 (iii)] The parent Specification describes an oil engine having an off-set combustion chamber C having two parallel side walls provided with valves S. According to the present invention to increase the whirling effect the wall D nearer the cylinder axis is inclined. The injector i may be arranged horizontally or vertically in the chamber.
Patent GB-109187-A (GB)
Title: Improvements in, and relating to, Silencers for Internal Combustion Engines.
Inventor: MCLAREN WILLIAM DICK
IPC: F01N5/02
Filed: 1916-12-27
Abstract: 109,187. McLaren, W. D., and Welsh, G. M. Dec. 27, 1916. Generating by indirect contact of hot gases.- The exhaust gases of an internal-combustion engine are silenced by passing them through chambers b in free communication with, and external to, a steam-boiler a, the exhaust gas circuit being independent of the boiler combustion and flue spaces. The gases may pass through tubes e in the chambers. In a modification, the gases pass around water-tubes opening into water spaces at the top and bottom of the chambers. Specification 7436/07 is referred to.
Patent GB-599613-A (GB)
Title: Improvements in the determination of the content of a mineral in ores or the like
IPC: G01N27/72
Filed: 1944-09-27
Abstract: 599,613. Magnetic tests and measurements. WIIG, R. C. O. Sept. 27, 1944, No. 18514. [Class 37] An apparatus for determining the percentage iron content in a mineral ore comprises a coil for the insertion of a core containing a sample of the ore, the field of the coil in the absence of the sample being neutralized by that of a second coil or a permanent magnet, and indicating means responsive to the difference in the field strengths to give a measure of the iron content. In the Figure, laminated iron members 4, 5 together with counterbalanced solenoids 2, 3 form the field magnets of a moving coil instrument. A sample of the ore in a container is inserted into solenoid 2, so unbalancing the two fields and deflecting the coil 1. The scale of the instrument may be calibrated to read directly in iron content or the pointer made to return to zero by the measured movement of an iron core 9 into the solenoid 3. In apparatus for measuring very small contents, an additional small permanent magnet 10 is provided and is adjusted to counteract any residual magnetism in the instrument. The Specification also describes measurement of the Fe content of ores of low - susceptibility, but requiring higher coercive forces by causing the change in magnetic field to deflect the beam of a cathode-ray tube.
Patent GB-185250-A (GB)
Abstract: 185,250. Geairns, A. J. E. June 17, 1921. Valves.-Combustible mixture compressed in the crank case is delivered through a non-return valve 12 into a transfer passage 4, and is admitted to the cylinder, after about one-seventh of the instroke has taken place, through radial ports 29, a recess 28, and an annular passage 31 associated with a combined slide and poppet valve of the type described in Specification 144,404. After two-thirds of the power stroke has taken place the poppet valve and pistoncontrolled exhaust ports are opened, and a rotary fan 37 withdraws exhaust gases and draws in cooling and charging air. The valves and the exhaust ports are arranged to close together.
Patent GB-748340-A (GB)
Title: Xerographic plate and the process for production thereof
Inventor: ISRAEL JACK BERTRAM
IPC: G03G5/14
Filed: 1952-07-23
Abstract: An electrophotographically sensitive member is formed by converting the scrupulously clean surface of an aluminium base member by heat treatment in air to a uniform layer of substantially non-porous, amorphous aluminium oxide and depositing thereon a photoconductive insulating layer e.g. of vitreous selenium, sulphur, a mixture of sulphur and selenium, or anthracene.  The aluminium base may be cleaned by immersion in a nitric-hydrofluoric, or nitric-phosphoric acid mixture and then oxidised by heating in air at 450 DEG C.; selenium may then be applied thereon by vacuum deposition, the plate being maintained at 60-75 DEG C.
Patent GB-831335-A (GB)
Title: Improvements in or relating to boxes for packaging purposes
IPC: B65D5/50
Filed: 1956-06-15
Abstract: 831,335. Boxes. LEWIS, F. I. May 17, 1957 [June 15, 1956], No. 18624/56. Class 18. A box comprises a rectangular base A and a cover B having a top panel 16 hinged at opposite sides to a front panel 17 to a rear panel 18 engageable with the base and being foldable along a score line 20 to form a display panel extending upwardly from the base, the box being enclosed by a sleeve C. In the closed position, reduced portions 19 of the panels 17, 18 engage tightly between the sides of the base A and flanges 12 of a platform 10 which fits into the tray, the platform having a central cut-out 11 to accommodate an article; the outer sleeve C is then slid over the assembled structure. To form a display stand, the sleeve C is removed, the top panel 16 folded double along the score line 20 so that a portion 22 defined by cuts 21 projects upwardly, and the portion 19 of the panel 17 is engaged behind the rear flange 12.