baber/WOPTO huggingface dataset:
Patent GB-1510281-A (GB)
Title: Electrophotographic or electrostatic printing process and apparatus
IPC: G03G15/16
Filed: 1976-02-05
Abstract: 1510281 Magnetic brush development MITA INDUSTRIAL CO Ltd 5 Feb 1976 04566/76 Heading B2L  In electrophotographic development, a onecomponent, magnetic, conductive or semi - conductive developer is retained on the surface of a member having an insulating surface coating of resistance # 10<SP>3</SP> ohms/cm<SP>2</SP> by means of a magnet within the member and brought into contact with a latent image to develop it. Said member may be a cylindrical sleeve about a magnet, the body of the sleeve being A1, and its coating being polystyrene, polyethylene terephthalate or Al 2 O 3 . The developer may have particle size 3-20Á and the particles may be ellipsoidal.
Patent GB-308044-A (GB)
Title: Improvements in and relating to exhaust steam heaters
IPC: F01K19/00
Filed: 1928-02-14
Abstract: 308,044. Wyndham, S. L., and Wyndham, J. N. Feb. 14, 1928. Sinuous-tube superheaters ; mounting and supporting superheaters. - E x h a u s t steam is reheated in sinuous tubes 4, Fig. 3, arranged across the uptake of a multitubular boiler and directly in front of or just above the ends of the smoke tubes. Reheating tubes arranged in the uptakes of a number of boilers are connected in series. The tubes may be carried in a, framework 17, Fig. 4, and suspended from brackets 18, angled strips 16 being provided to hold the tubes away from the ends of the smoke tubes. In a modification, the tubes are supported by bolts passing through the smoke tubes and by brackets attached to the smoke box. The reheated steam is used for power or heating purposes.
Patent GB-1139848-A (GB)
Title: Fluid pressure operated brake apparatus for railway car trucks
IPC: B61H1/00
Filed: 1967-01-31
Abstract: 1,139,848. Railway brake beams and rigging. WESTINGHOUSE AIR BRAKE CO. 31 Jan., 1967 [13 Sept., 1966], No. 4663/67. Headings F2E and F2F. A brake rigging for a two-axle four-wheel railway truck comprises two parallel brake beams 3, 4, Fig. 1, guidably supported for movement longitudinally of the truck, a piston 19 operable in a brake cylinder 15 secured midway of one brake beam on the longitudinal axis and a linkage operatively connecting a piston rod 20 to the other brake beam midway its ends to effect opposed movement of the brake beams when pressure fluid is supplied to the chamber 26. Piston 19 is connected to brake beam 4 through a parallelogram linkage 29, 56, 45, 49, the lever 56 being pivotably connected to a strut 59 of brake beam 4. Substantially equal forces are transmitted to the brake beams 3, 4 without relative movement between links 49, 45 and levers 29 and 56. The movement of brake beams 3, 4 in opposite directions applies brake shoes 10 to wheels 1, 2. The pin 33, Fig. 2, of the fulcrum member 27 is carried by the arms 30, 31 of a hanger member 32 which is pivotably mounted to a bracket 40 secured to brake beam 3. A spring 81 moves the piston 19 and cylinder 15 each in the brake releasing direction when pressure is vented from chamber 26. Guide feet 7, 9 are engaged in inclined grooves of wear plates and guide members (not shown) which have closed ends acting as limit stops when the brake beams 3, 4 are moved by gravity in the brake-releasing direction. Manual operation is effected by pulling chain 64 to the left in Fig. 1 this causes levers 56 and 29 to be rocked anti-clockwise, Fig. 1 and Fig. 4 (not shown). The lower end of lever 29 abuts web 65, Fig. 5, of the hand brake member 68 which is then pivoted anti-clockwise about its connection to chain 72, Fig. 5. This causes the brake beam 3 to be moved to the right in Fig. 1 since pins 77, 79 connect arms 66, 67 of member 68 to the support members 38, 39 and to the lugs 76 of bracket 40. When the brake shoes 10 carried by the brake beam 3 are engaged with the wheel tread the pin 57 becomes the fulcrum of lever 56, the latter being pivoted anti-clockwise in Fig. 1 to move the brake beam 4 to the left. When the pull on chain 64 is removed the brake beams 3, 4 are returned by gravity to the brake-released position.
Patent GB-1036452-A (GB)
Title: Improvements in and relating to a method and device for unwinding wire
IPC: B65H59/38
Filed: 1963-02-05
Abstract: 1,036,452. Unwinding. KANTHAL A.B. Feb. 5, 1963 [Feb. 5, 1962; Aug. 22, 1962], No. 4686/63. Heading B3E. A device for unwinding wire from a comparatively large storage unit comprises means adapted to rotate the storage unit, means for sensing the tension under which the wire is conducted to a following machine fed by the wire and electrically controlled means for varying the number of revolutions of the driving means in dependence on the tension as determined by said sensing means to keep the tension as constant as possible. Wire passes from a drum 61, rotated and braked by a motor 65, over upper pulleys 69, on a pivoted spring-urged arm 67, and lower pulleys 71 to a coiling machine. A tube 72 on the arm 67 is connected by a divided friction brake bushing in a bearing box 73 with a rod 75 an arm 76 of which actuates a switch controlling a variable resistor 79. In operation, the motor 65 is fed with A.C. to start rotation of the drum 61. When the drum 61 has reached a speed to overfeed the wire the arm 67 tilts sufficiently to cause the switch 77 to cut off the #AÀC. supply and connect a D.C. supply to the motor 65 which then begins to act as a brake, the braking effort being controlled by the variable resistor 79. When the coiling machine is stopped by pressing a button, the D.C. circuit to the motor 65 is broken and the circuit of an electromagnetic brake 86 is closed.
Patent GB-706883-A (GB)
Title: Improvements relating to fire extinguishers
IPC: A62C13/00
Filed: 1952-02-22
Abstract: 706,883. Forcing liquids by gaseous pressure. DIRECTIE VAN DE STAATSMIJNEN IN LIMBERG. Feb. 22, 1952 [Feb. 27, 1951], No. 4727/52. Class 102 (1). [Also in Group XXI] In a fire extinguisher in which liquid is forced from a container 1 by gas under pressure, in order to ensure an adequate gas pressure an inlet closed by a valve 4 is arranged adjacent a gas supply pipe 15 provided with a valve 17. The extinguisher is mounted on a support 10 by a rod 9 engaging a hook 11 and when it is swung outwards at its lower end, the valve 17 is opened by a rod carried by a deformable rubber ring 21 and the valve 4 is then opened by gas pressure to admit gas to the extinguisher before removal thereof from the support 10.
Patent GB-1139402-A (GB)
Title: Apparatus for synchronising sound and picture carriers
IPC: G03B31/04
Filed: 1966-02-03
Abstract: 1,139,402. Synchronizing system. M. YAMADA. 3 Feb., 1966, No. 4753/66. Heading G5R. In a system for synchronizing the change mechanism of a slide or film projector with a speech recording on magnetic tape, synchronizing signals of two different frequencies are also recorded on the tape. The film or slide carrier is normally moved forward by a mechanism 8 when a main signal (4, Fig. 2) at one frequency is received at 9, its frequency being such that a reed relay 13 is operated, the circuit to the mechanism 8 being established through the contact P and relay contacts 13. Periodically along the film notches 7 engage a feeler 12 to switch the contact P to its other position. When in this position the circuit for the mechanism 8 can only be established through the contacts 14, which require a second frequency (6) for their operation. The second frequency 6 is associated with an immediately preceding longer burst at the first frequency 5, so that if the film is lagging relative to the sound, it catches up during this burst. Thus periodically during the run, the positions of the film or slide carrier and the second frequency on the tape are brought into alignment. Instead of edge notches, photo-electric sensing arrangements may be used.
Patent GB-1181681-A (GB)
Title: Control Apparatus
IPC: G01J1/22
Filed: 1967-01-31
Abstract: 1,181,681. Photo-electric apparatus; photometers. BAUSCH & LOMB Inc. Jan. 31, 1967 [Feb. 24, 1966], No.4765/67. Headings G1A and G1P. [Also in Division G2] A movable attenuator means for providing coarse and fine adjustment of radiation intensity is used in a photo-electric system investigating the kinetics of chemical reactions e.g. of enzymes, by absorption analysis. The attenuator means comprises an optical wedge 76 which is moved across the beam by a servomotor 30 through a screw 92 and an opaque occluder 74, having an opening shaped in the form of a logarithmic function, which can be moved by servomotor 30 only when the wedge 76 is driven beyond the limits provided by extension members 94, 96 on the mounting of the wedge 16. The occluder 74 provides coarse, and the wedge 74, fine, intensity adjustments of the sample beam. The attenuator means is used in a two-path photo-electric system, Fig. 2, (not shown) being positioned in the sample path. The sample and reference beams are produced by means of a source (10) and a shutter (42) having two opposed arcuate slots, which rotates in the cylindrical cavity (45) of a block (44) past two exit slits (46, 48). This produces chopping of the beams and that they reach a photo-multiplier (26) alternately. The beam paths both include mirrors (50, 62) collimators (52, 64), filters (54, 66) condensers (56, 68), and a common ultraviolet filter (58). Specification 1,181,682 has a description of this and other systems which use the attenuator means of the present invention.
Patent GB-451787-A (GB)
Title: Improvements in or relating to automatic safety railway car couplings
IPC: B61G1/08
Filed: 1935-02-14
Abstract: 451,787. Automatic couplings for vehicles. JAKOBS, H., Maybach, Post- Friedrichsthal, Saar, Germany. Feb. 14, 1935, No. 4831. [Class 103 (v)] An automatic link-and-hook coupling for railway vehicles comprises on each vehicle a hook f having a slot k by which it is pivotally and slidably mounted upon a transverse operating shaft a, slotted coupling links j, o pivotally supported within forked members h, i which are also slotted to engage the shaft a, and lifting members d which are secured to the shaft a and adapted to engage under laterally projecting arms g on the hooks so that, by rotating the shafts a, both the hooks f and the links j, o are raised to a ready-forcoupling position. The hooks f, f<1> are supported in this position owing to the fact that they slide inwardly on the shaft a and engage beneath abutments l provided on brackets c fixed to the vehicles. When the vehicles are caused to approach each other, one of the links, e.g. o, raises the opposed hook f<1> and then allows the latter to drop into coupling position, while the other link j rides over the link o. If a subsequent pull on the couplings should disengage the hooks f, f<1> from the abutments l no uncoupling occurs, since the hooks fall into the position shown in Fig. 12, and the inner end of the link j slides into a position over the outer end of the link o. Uncoupling is effected by rotating the shaft of the engaged hook f<1> so as to raise the latter out of engagement with the link o and to place it in the ready-for-coupling position. From this position it may be returned to a normal suspended position by rotating the shaft a in a reverse direction, thus bringing into operation a cam e, which pushes the forked members h, i outwardly, these members in turn coacting with arms g to impart a like movement to the hook f<1>, which is then free to drop downwardly.
Patent GB-689561-A (GB)
Title: Improvements in and relating to metallising processes and apparatus
IPC: B05B12/00
Filed: 1947-02-19
Abstract: 689,561. Metallising spray producers. SARGROVE ELECTRONICS, Ltd., and SARGROVE, J. A. Jan. 30, 1948 [Feb. 19, 1947], No. 4834/47. Class 69 (iii). A metallising spray gun 16 which is fed with compressed air controlled by a valve 27, has the metal for spraying fed in the form of a wire 28, by a drive pulley 29 driveri by a motor 30, co-operating with a backing pulley 32 which is held in operative position by a piston 34 only when the air supply is allowed to reach the gun, so that the metal wire is fed to the gun only when required. In the apparatus shown a gun or bank of guns is employed to spray a metal coating on radio panels 12 carried by a conveyer 10. When a panel reaches the spraying compartment 11 a photocell or other sensing device initiates action by a control unit 15 whereby the spray guns are started up and brought into action. A pilot jet 19 of easily ignited town gas is ignited by a spark plug 21 and in turn ignites the jet 16, the supplies of gas and air being released by electromagnetic valves 23, 25, 27, in the correct sequence. After a time interval sufficient to complete the spraying of one panel the gun is shut off in the correct sequence and left ready for the next cycle, if however a further panel arrives before this period has elapsed the spraying operation continues for a further period. The longitudinal motion of the conveyer traversing the panel at slow speed ensures uniform spraying in one direction, a linear rocking motion being applied to the gun in the vertical direction by a piston 39 driven by compressed air in double acting fashion. The rate of wire feed to the gun is monitored by a pulley 52 fitted with contacts 33 sending a regular series of pulses to the control unit 15 which if arriving within the permissible time interval keep the gun in operation. In the event of the wire feed becoming too slow the interval between the pulses from contacts 33 becomes too long to maintain the control unit in operation and the apparatus is shut down in correct sequence and an alarm indicator energised. The control unit 15 comprises a multiple stepping switch, for correct sequence of starting and stopping the various supplies of gas, &c., and a three-valve electronic circuit for commencing and timing the sequence of operations and for shutting down the apparatus in the event of failure of any of the essential supplies and in conditions necessary for successful production of sprayed panels on the conveyer 10. Specifications 570,877, [Group XXXV], 635,756 [Group XXXVII], and 689,563, [Group II], are referred to.
Patent GB-622319-A (GB)
Title: Apparatus for measuring backlash in gears
IPC: G01B5/20
Filed: 1947-02-19
Abstract: 622,319. Testing toothed gears. FELLOWS GEAR SHAPER CO. Feb. 19, 1947, No. 4890. Convention date, April 4, 1946. [Class 106 (ii)] Apparatus for measuring the backlash of toothed gears by measuring the changes in distance between the centres of pairs of fully meshed gears comprises means for modifying the indications of these changes to take into account the various pressure angles of the teeth of different gears. As shown, a base 1 supports a removable fixture carrying a stud 3 in which the gear W to be tested is mounted, and a carriage 8 adjustable along the base has a stud 7 on which is pivoted a holder 4 having a stud 5 on which a master gear 6 is mounted. A modified fixture can be used when internal gears are to be tested. A bracket 9 in the free end of the holder 4 supports in bearings a conversion shaft 12 having a cam face 13 thereon which is engaged by one end 28 of a bell-crank lever 27. This lever is pivotally supported by a bracket 26 secured to the casing of a sensitive dial gauge 18, and the other end 29 of the lever engages the plunger 21 of the gauge. The shaft 12 can be turned by an indicator knob 14 which co-operates with a scale 16 marked to correspond with the pressure angles of the gears to be tested. The gauge 18 is carried by the carriage 8, and is of the type in which the dial face can be rotated relatively to the pointer 19 and having two further pointers 24, 25 to indicate tolerance limits. A screw 31 and spring means 30 on the holder 4 ensure that the gears are in full mesh. In operation, a second master gear having the same dimensions as the gear W to be tested is mounted in the stud 3, the carriage 8 advanced to mesh the gears, the conversion shaft 12 set according to the pressure angle of the gear to be tested and so change the position of the cam face 13, and the dial face of the gauge 18 adjusted so that the pointer 19 indicates the known backlash of the master gear on stud 3. The gear W to be tested is then substituted for the master gear in the stud 3, the gears rotated, and the movements of the pointer 19 noted. Since the stud 5 is mid-way between the axes of pivot 7 and shaft 12 and the cam face 13 is set according to the pressure angle of the test gear, a direct reading of backlash is given by the pointer 19. By suitably setting the cam face, the apparatus can be used to read directly the change in centre distance between a master gear and a test gear. In a modification, the pivoted master gear holder 4 is connected to an arm by a spring and a distance piece, this arm being pivotally-connected at its other end by a leaf spring mounting to a block on the movable carriage 8. The dial gauge 18 in this case is adjustably-mounted in a slot in the carriage so that its plunger can engage the arm at different distances from the pivot of the latter and so compensate for the different pressure angles of the test gears.
Patent GB-1158409-A (GB)
Title: Method and Apparatus for Determining and Recording the Optical Density of a Sample
IPC: G01N21/59
Filed: 1967-02-01
Abstract: 1,158,409. Photo-electric apparatus. G.A.F. CORP. Feb. 1, 1967 [Feb. 18, 1966], No. 4911/67. Heading G1A. The optical density of a plurality of portions of a film is sensed by a photo-electric detector, the output from which is converted into pulses of frequency proportional to the amplitude of the detector output, the number of pulses counted in a predetermined time being used to obtain a record of the optical density of each portion of the film at the various positions. The film 296 is located in grooves 292, 294 in carriage 290 and a button pressed to initiate a series of measurements on the film. The carriage 290 is driven by a motor to move the strip 296 continuously or stepwise between a light source 304 and photo-multiplier tube. A particular measure - ment on a portion of the film is started when an aperture 300 in a member 298, which is moved along with the film, arrives between a light pipe (306, Fig. 3, not shown), guiding light from the source 304, and a photo-sensitive cell 302. This causes a relay (314) to become energized and a thyratron (310) to extinguish, producing a control pulse to a pulse counter (28, Fig. 1, not shown). The amplitude of the photo-multiplier output, representing the optical density of the film, is converted (24), into a pulse signal, the number of which pulses occurring in a predetermined interval, e.g. 100m sec, is measured by the counter (28). When the next aperture 300 arrives between light pipe (306) and photo-cell 302, the relay is again energized and a further control pulse issued to the counter (28) which simultaneously passes on the count attained in the measurement interval in binary-coded decimal form, resets to zero, and begins counting for the next portion of the film. The coded count is decoded (32) to decimal form and fed to a card punch (36) which initiates punching of a card to give a record of the optical density of the particular portion of the film. Manual control of the card punch is through an identification keyboard (54) and the card punch control unit (50). The colour of the light used may be changed as desired by positioning the required filter of a filter wheel (370, Fig. 4, not shown) in the light path. When this is done, a suitable resistor is switched into the lamp circuit to change its brightness to allow for variations in filter density and detector spectral response and a signal is fed to the card punch to record the fact that a particular filter is used. Automatic gain adjustment of the photomultiplier is provided.
Patent GB-944321-A (GB)
Title: Process for the manufacture of 11ª -hydroxy-6ª -halogen-pregnenes
IPC: C12P33/10
Filed: 1960-02-12
Abstract: D  4-6a -Fluro- or -chloro-16a -alkyl-11a :17a :21-trihydroxy-pregnene-3:20 -diones and their D 1-dehydro-derivatives and 21-esters are prepared by microbiological 11-hydroxylation of the corresponding 11-desoxy compounds using an enzyne of the fungus Aspergillus ochraceus. Examples are given, and the yield of product is compared with that obtained in similar hydroxylation experiments using Aspergillus niger and Rhizopus arrhizus in place of A. ochraceus.  The starting materials are prepared for example, by oxidizing a D 5:17(20) 3b :20-diacyloxy-16a -methyl-pregnadiene with a per acid, treating the isomeric mixture of 5:6:17:20-dioxido-3b :20-diacyloxy-16a -methyl-pregnanes so obtained with an oxygen containing mineral acid, esterifying the secondary hydroxyl group in the resulting 5a :6b -dihydroxy compound with a sulphonic acid, treating with an alkaline agent, treating the thus produced 5a :6a  - oxido - 17a -hydroxy-20 - ketone with bromine, treating the 21-bromide so formed with a salt of a lower aliphatic carboxylic acid, opening the 5a :6a -oxido group in the resulting 3:17a -dihydroxy-21-acyloxy - 5a :6a  - oxido - 16a -methyl-pregnan-20-one, before or after oxidizing the 3-hydroxy group to a keto group, to form the 5a -hydroxy-6b -fluorohydrin or -6b -chlorohydrin, eliminating the 5a -hydroxyl group to form a 4:5-double bond, isomerizing the 6b -halogeno compound to a 6a -halogeno compound and, if desired, introducing a 1:2-double bond and/or hydrolysing the 21-acyloxy group.
Patent GB-597694-A (GB)
Title: Improvements in or relating to chairs
IPC: A47C7/62
Filed: 1945-03-01
Abstract: 597,694. Chairs. BARHAM, C. W. March 1, 1945, No. 5129. [Class 52(iii)] A chair has a receptacle 10 hinged to swing outwardly from beneath the seat 13 for access.
Patent GB-1471031-A (GB)
Title: Stilts for use in mine workings
IPC: E21D15/20
Filed: 1974-05-13
Abstract: 1471031 Yielding mine roof support stilts GKN SANKEY Ltd 13 May 1974 [5 Feb 1974] 05221/74 Heading E1E A stilt 10 adapted to yieldingly support an H-shaped mine roof support 11 consists of a tubular member provided, in a pair of opposed walls, with aligned, longitudinally extending slots 13; the support 11 bearing on superimposed deforming members 14, 23 adapted on yield to deform the walls bordering the associated slots in which case one deforming member may reverse the deformation of the other. The stilt may be constructed from two U-shaped sections welded to-gether and is re-inforced across the slots by straps 19; a projecting portion 20 being provided to prevent incorrect positioning of the support 11 in the stilt. In a modification, see Fig. 6, (not shown), the slot is tapered and the straps dispensed with. For minor modifications and details concerning the use of one deforming member, construction of stilt to the Specification should be referred to.
Patent GB-197443-A (GB)
Title: Improvements in and relating to scrapers for excavating purposes
IPC: E02F3/76
Filed: 1922-02-22
Abstract: 197,443. Risley, W. S. Feb. 22, 1922. Scraping-apparatus. - A scraper comprises a scoop, a rigid draft tongue having a direct pivotal connection with the back of the scoop, a rigid draft-applying device pivoted at its rear to the front of the scoop and means on the tongue to engage the front of the draft-applying device and hold it in a set position. A scoop 3, formed from a single blank, is reinforced with angle bars 5, 6, and provided with runners 8 and rockers 30. A pivot pin 14 connecting the bars 5 is slidably connected to a tongue 10 by a dished plate 13. The tongue 10 is formed of spaced angle bars and supports a slide 19 connected by a bail 17 to the scoop. A pivoted latch member 20 normally holds the slide 19 forwardly and is released by turning a pivoted lever 21 carried thereby until rollers 23 engage the slide. A pivoted lever 25, pulled rearwardly by a spring 28, is connected to the pivot pin 14 by links 27. In operation, the machine is connected by a ring 15 to a tractor and the scoop is moved to the loading position, shown in dotted lines in Fig. 1, by pulling on a cable 26; when loaded, the scoop is permitted to return to the position shown in full lines in Fig. 1 and hauled to the dump, the latch 20 being then raised to permit the scoop to empty as shown in Fig. 3.