baber/WOPTO huggingface dataset:
Patent GB-628876-A (GB)
Title: Improvements in art of reclaiming plastic scrap
IPC: C08J11/18
Filed: 1946-06-12
Abstract: Monomeric compounds containing a vinyl group are recovered from scrap polymers of such compounds by immersing the scrap in a liquid which volatilizes without decomposition under the conditions of the process, and progressively increasing the temperature and/or reducing the pressure so that the less stable part of the scrap is decomposed below the decomposition temperature of the bulk of the scrap.  The monomer is then isolated from the decomposition products by fractional distillation.  Suitable liquids (which may or may not be solvents for the scrap) are dimethyl maleate, dibutyl phthalate, and the residue obtained in the process after the recovery of the monomer by fractional distillation; this residue has polymerization - preventing properties.  The residue referred to may contain a plasticizer present in the original scrap, and this may be recovered. An example is given in which methyl methacrylate scrap is heated to 340 DEG  C. in progressive stages under reduced pressure in the liquid distillation residue obtained at a later stage in the process, and monomeric methyl methacrylate is recovered by fractional distillation of the condensate.  The process may be applied also to scrap polymers of vinyl acetate, vinyl chloride, styrene, vinylidene chloride, acrylates and methacrylates generally, vinyl butyraldehyde, and scrap copolymers of vinyl acetate and vinyl chloride or of methacrylates and vinyl butyraldehyde.ALSO:Monomeric compounds containing a vinyl group are recovered from scrap polymers of such compounds by immersing the scrap in a liquid which volatilizes without decomposition under the conditions of the process, and progressively increasing the temperature and/or reducing the pressure so that the less stable part of the scrap is decomposed below the decomposition temperature of the bulk of the scrap.  The monomer is then isolated from the decomposition products by fractional distillation.  Suitable liquids (which may or may not be solvents for the scrap) are dimethyl maleate, dibutyl phthalate, and the residue obtained in the process after the recovery of the monomer by fractional distillation; this residue has polymerization-preventing properties.  The residue referred to may contain a plasticizer present in the original scrap, and this may be recovered; it may also contain other substances produced in the process, e.g. dimethyl maleate from methyl methacrylate scrap. An example is given in which methyl methacrylate scrap is heated to 340 DEG  C. in progressive stages under reduced pressure in the liquid distillation residue obtained at a later stage in the process, and monomeric methyl methacrylate is recovered by fractional distillation of the condensate.  The process may be applied also to scrap polymers of vinyl acetate, vinyl chloride, styrene, vinylidene chloride, acrylates and methacrylates generally, vinyl butyraldehyde, and scrap copolymers of vinyl acetate and vinyl chloride or of methacrylates and vinyl butyraldehyde.
Patent GB-176800-A (GB)
Abstract: 176,800. Buschbaum, H. March 10, 1921,[Convention date]. No Patent granted (Scaling fee not paid). Dials ; indicating, optical devices for.-The numeral-bearing elements of counters employed in calculating machines or, according to the Specification as open to inspection under Sect. 91 (3) (a), clock dials, have their numerals formed in silhouette by cutting away the surrounding or adjacent metal as shown for example in the case of a disc 1. Different backgrounds 11, 12, 13 for distinguishing or rendering invisible selected figures may be furnished by a coloured rotary plate 8 placed behind the numerals. A method of producing the numerals by successive stamping-operations performed upon the disc is illustrated in the Specification. The reference to clocks does not occur in the Specification as accepted.
Patent GB-626617-A (GB)
Title: Improvements in or relating to turret operating mechanism for automatic lathes
IPC: B23Q15/00
Filed: 1945-07-12
Abstract: 626,617. Turret lathes. TAREX SOC. ANON. July 12, 1945, No. 17794. Convention date, Aug. 21, 1944. [Class 83 (iii)] A control device for the turret of an automatic lathe, having tool-slides actuated successively and independently of one another, is characterized in that a control member is connected to a source of energy by a connecting member set in active position at desired instants by an impulse emitted from a rotating distributor, a safety device being provided for stopping the actuation of the control member and the release of the energy source on an overload occurring, an interlocking device also preventing indexing of the turret as long as a member connected to the control member is out of its starting position. The turret R carries toolslides RC on its dovetailed faces which are operated when in line with the work-spindle axis through rods 8 from supplementary slides 9 carrying adjustable wedge cam-tracks 10, as described in Specification 598,082. These camtracks are engaged in this position by a follower 31 on a sleeve 30 traversed by a reversible lead screw 19. The clutch for the screw which has forward, reverse, and neutral positions, is under control of an electromagnet E1. The screw receives its drive from a variable-speed gear-box V driven by an electric motor M either from a high-speed shaft and gear-wheels 60, 61, or from a slow-speed shaft and gearing 27, 26. The clutches for selecting these drives are controlled respectively by electromagnets E3, E2. Different working feeds for the slides are selected when the limit automatically indexes (as described. in Specification 626,615 and 626,616) by cam-pieces 35, on an extension of the turret, striking tappets 87 protruding from the variable-speed gear-box. The gearbox also drives an electrical distributor or controller D of the kind described in Specification 595,974, [Group XXIV], which operates switches 1C to initiate a cycle of movement of the turret R. A safety-device is incorporated in the drive to the shaft 19 comprising a slipping clutch f, g, which, when slipping, moves a cam 29 axially to engage the roller of a switch 15. This switch operates an alarm signal (sound or visual) at A, energizes an electromagnet E4, which opens the mains switch to the machine, thus interrupting the circuits to electromagnets E1, E2, E3, and stopping the whole machine. The slides RC and the screwed sleeve 30 have tappets secured thereto which operate switches to stop the feed and start the indexing of the turret through an auxiliary cam-shaft and one-revolution clutch drive. In a modification, the sleeve 30 and screw may be replaced by a single rod under the control of a cam drum driven by worm-gearing from the variable-speed gear-box V. Specification 626,614 also is referred to.
Patent GB-147350-A (GB)
Title: Improvements in or relating to steam condensing apparatus
IPC: F01B25/00
Filed: 1919-07-16
Abstract: 147,350. Scanes, A. E. L., and Metropolitan-Vickers Electrical Co. July 16, 1919. Condenser systems.-Condensate is withdrawn from a steam condenser 1, operating under vacuum, by means of an hydraulic ejector 3 discharging to a tank 4, which is maintained under a pressure lower than that in the condenser 1, and from which the condensate is removed by a hot well or boiler feed-pump 5. By this means, the quantity or pressure of the water used in the ejector 3 is reduced, and the condensate is deaerated in the tank 4. A vacuum is produced in the tank 4 by means of a steam-ejector 8 or other air-extractor, and the air outlet 9 from the condenser 1 may be connected to the tank 4 or to a separate air-extractor. In the latter case, the steam ejector 8 may discharge into the condenser. The water for operating the ejector 3 may be supplied by a pipe 6 from the discharge from the pump 5.
Patent GB-134325-A (GB)
Title: Improvements in Bearing-plates, Chairs and Built-up Sleepers.
Inventor: MORGAN FREDERICK ROBERT
IPC: E01B3/24
Filed: 1918-10-31
Abstract: 134,325. Morgan, F. R. Oct. 31, 1918. Chairs with fixed jaws; chair plates; tie-bars; sleepers integral with chairs; sleepers, chairs, and parts, arrangements of.-Chair plates have two staggered jaws, each jaw having two railgripping faces A, C, so that the chair plate may be secured relatively to the rail in one of two positions at right-angles to each other. Chairs are similarly formed. The chair or chair plate may be formed integral with a pot-sleeper. Inclined rail seats B are provided. The jaws may be so spaced and shaped as to grip in each position a different rail section. To prevent creep, adjacent chairs &c. may face opposite directions, Fig. 5, or adjacent groups of chairs may be oppositely arranged. The split cotter securing the tie-bar may have its ends bent around upper and lower lugs on the sleeper.
Patent GB-145634-A (GB)
Title: Improvements in and relating to locks
IPC: E05B55/00
Filed: 1920-06-30
Abstract: 145,634. Schulte, C. E., [Firm of]. June 23, 1919, [Convention date]. Night-latches. - A latch-lock with a turn-and-a-half operation comprises a latch bolt e guided in the turned-up walls of the casing a and pressed forward by a spring g. A spring-controlled tumbler i is provided' with lugs l, m adapted to co-operate with converging stops n, o carried by the latch e. When the stops n, o engage with the lug t, motion of the latch is prevented in either direction, but the lug m is formed with an inclined forward surface which cooperates with the stop n to raise the tumbler and allow the bolt to be withdrawnwholly within the casing. Two cylinder locks p, q arranged one behind the other in the direction of motion of the bolt are provided with driving pa.wls s, v. The pawl s co-operates with clots t, u formed in a gap e<1> in the latch to raise the tumbler e and either allow the bolt to shoot forward to the fully-locked position, Fig. 6, or withdraw it to the normal position. The same operations may be performed from inside the door by the pawl v co-operating with the lugs l, m on the tumbler acting as a driver on the stop n. The bolt may be withdrawn wholly within the casing by either of the pawls s, v or by a pressure knob w provided with a pawl x which acts on a flap f on the bolt e.
Patent GB-1464768-A (GB)
Title: Method and apparatus for quality control of semiconductor devices and integrated circuits
IPC: G01R31/26
Filed: 1974-04-24
Abstract: 1464768 Measuring semi-conductor parameters EI MODEL AS SAVINA J L NUROV AN PIORUNSKY BE FEDOROV and V M IVANOV 24 April 1974 17897/74 Heading G1U The exponent in the expression:- representing the current-voltage characteristic of an ideal p-n junction is multiplied by 1/m, m being an indication of the deviation of the actual characteristic from the ideal. To measure m, the current through the junction is varied while remaining between predetermined limits equal to (a), the current when the voltage across the junction exceeds 4 # T  and (b) a value #T/Rb where # T  is the thermal potential equal to KT/q and R b  is the total   resistance in the junction circuit. The voltage changes across the junction may be shown to be proportional to m. if m lies outside predetermined limits e.g. M min  # 1, M max  # 2, the device containing the tested junction is rejected as unreliable. Two forms of direct measurement are disclosed, in the first Fig. 3, two values of current are supplied to the junction under test 3 which is placed in the negative feedback loop of operational amplifier 11. The current changes are effected by switch 2 which alters the value of the current from source 7 applied to amplifier via resistors 13 and 14. The change in voltage across the junction 3 appears as an A.C. output voltage which is amplified 4 and indicated on an A.C. meter. Various modifications are disclosed Figs. 4 and 5 (not shown) for different arrangements of current changing. In the second form of direct measurement, Fig. 6, the input to the junction under test 3 comprises an exponential current pulse derived from the discharge of capacitor 23 when switch 2 is open. It is shown that the rate of change of the voltage across the junction under these circumstances is directly proportional to m. Thus, the junction voltage is differentiated 4 and displayed on an oscillograph or strobed meter 5. Other examples are disclosed Figs. 7, 8 (not shown), wherein the exponential currents are derived from-an inductance and by applying a saw-tooth current waveform to a reference junction which has an exponential characteristic. Other embodiments are shown which utilise reference junctions and subtraction arrangements to produce outputs indicating the deviation of the value m from a reference value Figs. 9-10 (not shown). Also, arrangements such as that of Fig. B (not shown) can be expanded to give n values of input current, spaced such that predicted equal voltage changes should occur across the junction when switching from one value to the next Fig. 11 (not shown).
Patent GB-595998-A (GB)
Title: Improved uncoupling mechanism for railway vehicle couplings
IPC: B61G3/08
Filed: 1945-07-13
Abstract: 595,998. Vehicle couplings. GENERAL MOTORS CORPORATION. July 13, 1945, No. 17903. Convention date, July 24, 1944. [Class 103 (v)] The lifter lever 18 for unlocking a vehicle coupling 10 is operated by a U-shaped member 20 pivotally mounted on the coupling, through a slotted link 66, bail 76, and uncoupling rods 90, 112. The horizontal limb 28 of the member 20, as shown in Fig. 5, is divided longitudinally, each portion being integral with one of the side arms 32, 52, this construction enabling pintles 46, 58 at the ends of the side arms first to be inserted in recesses in the coupling and the two portions then to be rigidly connected by rivets or bolts 64. In the construction shown one portion of the limb 28 is formed with a longitudinal tongue 50 fitting into a correspondingly shaped groove 30 in the other portion of the limb. The uncoupling rods 90, 112, are connected to eyes 86, 88 at the ends of the bail 76 in such a way that either may be operated without affecting the other. A tension spring 128 connects the bail to a fixed portion of the structure and serves to return the parts to their normal positions after the coupling has been unlocked. A slot 68 in the link 66 allows the latter to move angularly relatively to the central portion of the bail when the carriage rounds a curve, and also allows the coupling 10 to move towards the carriage when the draft gear is compressed during buffing.
Patent GB-239330-A (GB)
Title: Improvements in and relating to elastic fluid turbines
IPC: F01D25/28
Filed: 1924-07-26
Abstract: 239,330. British Thomson-Houston Co., Ltd., and Halliwell, R. F. July 26, 1924. Mounting and supporting.-In a turbine wherein pedestals carrying the shaft bearings are formed separately from the casing, members on the casing co-operate with supporting members on the pedestals the supporting facings of which are equally and oppositely inclined to the base, preferably at 45‹, with their planes passing through the axis of the shaft in such manner as to permit of radial movement relatively to the shaft centre. As shown in Fig. 2, lugs 6 on a turbine casing 1 rest on facings 5 of projections 4 on a separate bearing pedestal 3. Holes for fixing bolts 7 are provided and are sufficiently large to permit of any movement which may occur. A key may be provided to prevent axial movement. Fig. 5 shows an alternative arrangement wherein two co-operating arc-shaped flanges 18, 11 on the casing 1 and pedestal 3 respectively are fitted with radial keys 12, equally and oppositely inclined to the base and having their centre lines meeting on the shaft axis.
Patent GB-808332-A (GB)
Title: Conveying device
IPC: B65G53/42
Filed: 1957-06-05
Abstract: 808,332. Suction cleaners ; transmitting solid materials in liquids. BAUMEN, F. W. R. VON DEN. June 5, 1957 [June 7, 1956], No. 17927/57. Classes (81) and 102(2). [Also in Group XXX] A nozzle for a pneumatic or hydraulic conveying device for powder, granules, flakes, peas, &c., is in the form of a bottomless box 1, Fig. 1, which is divided by partitions 2 into a single elongated duct. The conveying medium enters at 3 and leaves with the material at 4. In a modification the sides of the box are removed and the remainder is placed on the open top of a box 5, Fig. 2, which has been filled with material. In another modification the duct is in the form of a spiral.
Patent GB-912364-A (GB)
Title: Improved hydraulic means for the fluid pressurisation of hydraulically operable components
Inventor: KENT CECIL
IPC: E21D15/58
Filed: 1958-06-05
Abstract: 912,364. Hydraulic apparatus. MUSCHAMP & CO. Ltd., N. J. March 20, 1959 [June 5, 1958], No. 17956/58. Class 69 (2). An hydraulic intensifier 13 for pressurization of hydraulically-operable components 1-6, such as roof supports for underground mines, comprises a differential piston 20 automatically displaceable consequent upon inadequate pressure in the components, and fluid control means 27 which provide the piston with power and return strokes until adequate pressure is obtained. The control member 27 consists of an annular member which is disposed on a reduced portion 20a of the large diameter portion 21 of the piston and has grooves 27b, 27c co-operating with an inlet port 23 connected by means of a valve 8 to a supply line 9, an exhaust port 126 and spring-pressed balls 28. The member 27 is axially movable in the intensifier cylinder during the movement of the piston by abutment of portions 20b, 21a thereon and springs 29, 30. In operation, a piston-and-cylinder device 7 supplied with fluid pressure from the line 9 is actuated to advance the supports step-by-step until they engage the roof. The fluid from the line 9 then passes through the inlet port 23 and apertures 27d in the groove 27c to move the piston to the right to pressurize fluid in a cylinder 16 supplied from the line 9 through a one-way valve 25, the pressurized fluid then passing through a one-way valve 19 and pipe 18 to the supports. As the piston moves to the right, the portion 20b and spring 29 move the member 27 to the right so that the balls 28 engage the groove 27b. The inlet port 23 is thus closed, the exhaust port 126 opened and the supply from the line 9 to the cylinder 16 moves the piston to the left until the portion 21a and spring 30 return the member 27 to its first position for the next power stroke of the piston. The operation continues until the ratio of pressures in the lines 9, 18 is the same as the ratio of the areas of the portions 21, 22 of the piston. The intensifier will automatically operate to maintain the pressure in the supports in the event of any drop in pressure. Relief valves 11, 12 are provided to reduce the pressure in the supports if the pressure therein rises above a predetermined level. A manually-operable pressure valve 26 enables different values of high pressure to be obtained from the intensifier.
Patent GB-658364-A (GB)
Title: Improvements in or relating to anodes for cathodic protection of metal structures
Inventor: HIGGINS WILLIAM FREDERICK
IPC: C23F13/02
Filed: 1949-07-07
Abstract: 658,364. Preventing corrosion. HUGHES & CO., Ltd., F. A. July 7, 1949, No. 17977. [Class 123(i)] An anode for the cathodic protection of metal structures, such as underground iron pipes, comprises a block 1 of, for example, magnesium or magnesium base alloy and a flat iron or steel rod or strip 2 which is embedded in said block with an end projecting into an end recess 3 in the latter. The projecting end of the strip 2 is provided with a bolt 7 for securing a connecting wire 8 thereto, and the anode is completed by a bituminous &c. substance 9 which is poured into the recess 3 to fill same and cover the bolt 7 and free end of the wire 8. Appropriate dimensions for the block 1 and 2 are specified.
Patent GB-721919-A (GB)
Title: Button feeding device for button sewing machines
IPC: D05B3/14
Filed: 1952-07-16
Abstract: 721,919. Feeding buttons. EMSIG, M., EMSIG, S., EMSIG, J., and SUCHER, J. R., [trading as EMSIG MANUFACTURING CO.]. July 16, 1952 [July 16, 1951], No. 17992/52. Class 78 (1). [Also in Group VII] Buttons, attaching.-In a device for feeding buttons with sewing holes to a presser-foot by means of tilting lever members having means for engaging the holes for orientating and transporting the buttons by sliding movement along a guide shoot between a source of supply and the presser-foot, slide-limiting means effective on the buttons independently of the movement of the orientating and transporting means are provided, so that the positioning of the buttons is not liable to be affected by momentum effects in high-speed operation. The apparatus described is substantially the same, except as indicated below, as that of Specification 701,586, in which the presser-foot 26 is rigid with the end of the shoot 25 and means for lifting the foot and the shoot simultaneously moves downwards a carriage sliding on the shoot, the carriage having mounted thereon tilting levers 42, 47; the first lever has a pin 38 for engaging a hole of a button and moves between guiding plates 27, 28 to draw the button downward and position it with the hole substantially on the axis of the shoot, and the second lever has two pins 92 to engage two holes of the button on the next actuation of the parts and carry the button to the sewing point while maintaining it in the correct orientated position for subsequent passage of the needle through its holes. In the present apparatus free movement of the button down the shoot, before engagement by the lever 42, is limited by a member 67 pivotably mounted at 69 on a bracket 73 on the presser-foot and biased by a spring 76 mounted on a pin 77 on the bracket. When positively moved by the lever 42, the button forces up the member 67 and passes under a pressure member 72 on an arm also pivoted at 69 and biased by a spring 80 on the pin 77 to hold the button until it is engaged by the lever 47 and moved to the sewing position, where it is again held by an arm 102 pivoted on a block 103 on the presser-foot and biased by a spring 107. The downward movement of the carriage relative to the shoot and foot is limited by engagement of an abutment on the bracket 73 on the foot with a pin 89 on the lever 47, which is slotted at its pivot to allow limited movement of the carriage before it is stopped. Specification 660,471, [Group VII], also is referred to.
Patent GB-1494389-A (GB)
Title: Water-based textile printing paste
IPC: D06P3/82
Filed: 1975-04-30
Abstract: 1494389 Disperse dye printing pastes PROTAN & FAGERTUN A/S 30 April 1975 [30 April 1974] 18025/75 Heading D1B Printing pastes used on hydrophobic fibres comprise a disperse dye, water and magnesium alginate as thickening agent. The print pastes may be used on blends of polyester with cotton in which case a reactive dye is employed for the cotton. Sharp prints of good colour yield are obtained in the absence of sequestering agents. Preferably the paste contains 3-4% by weight of alginate and has a pH of 5-6.
Patent GB-256038-A (GB)
Title: Apparatus for and process of carbonizing coal
IPC: C09K5/12
Filed: 1925-07-15
Abstract: 256,038. Rodgers, R. L. July 15, 1925. Coking processes; retorts. - Coal is charged into comparatively thin chambers which are heated by being enclosed in a bath of fused salts at a temperature below 1400‹ F. The chambers may be six feet long, five feet high and eight inches wide, and a mixture of salts consisting of 75 per cent of calcium chloride and 25 per cent of sodium chloride may be used to heat them. The charge containers 4 are provided with double walls 5, 6 and each container has a bottom plate 9 sliding in grooves 8 and two covers, the outer 10 of which encloses the space between the .double walls and is provided with a plug 13 through which the fused material is introduced and the inner cover 14 which is wedged into the outer cover and is raised when the chamber is charged. A gas outlet 17 is provided on each outer cover 10. The chambers are heated by surrounding fire-brick flues by combustion products the heat of which may be controlled by thermostatic regulation from the fused salts. On withdrawing the bottom plates 9 the coke is .discharged into cooling-pits 19.