baber/WOPTO huggingface dataset:
Patent GB-785353-A (GB)
Title: Substituted pteridine derivatives
Filed: 1954-01-29
Abstract: The invention comprises compounds of the formul  <FORM:0785353/IV (a)/1> and <FORM:0785353/IV (a)/2> (wherein R* is an acyl radical or a hydrogen atom, R is an alkoxy or aralkoxy radical, R1 is a hydroxy, alkoxy, aryloxy or aralkoxy radical and R11 is an acyl radical); the preparation of compounds (1) in which R* is an acyl group by reacting a 2-amino-4-R1-6-di-R-methyl-pteridine with an acylating agent, e.g. acetyl, propionyl or butytyl chloride or the corresponding anhydride, benzoyl bromide or benzoic anhydride, advantageously in an inert organic solvent or, preferably, in an excess of the agent under reflux; combination of this reaction with the preparation of compounds (1) in which R* is hydrogen by reacting the corresponding 2-amino - 4 - R1 - 6 - di - R - methyl - 5,6 - dihydropteridine with a mild oxidizing agent, e.g. hydrogen peroxide and a ferrous salt or air, oxygen or iodine, preferably in an alcohol, a glycol, acetone, benzene, formamide, dioxan or water at a pH of about 8 to 9; combination of this reaction with the formation of the dihydropteridine by condensing a 2-halo-3,3-di-R-propionaldehyde with a 2,4,5-triamino-6-R1-pyrimidine, preferably in presence of a condensing agent, e.g. sodium acetate, disodium phosphate, silver carbonate or sodium formate, and a solvent, e.g. water, an alcohol or glycol, acetone, benzene or formamide at 60-65 DEG  C.; and the preparation of compounds (2) by hydrolysis with an acid of compounds (1) wherein R* is an acyl group, preferably with a mineral acid or acetic or formic acid in a solvent which may be water, an excess of the acid or an inert organic solvent.  In examples: (1) 2-bromo-3,3-diethoxy-propionaldehyde and 2,4,5-triamino-6-benzyloxypyrimidine give 2-amino-4-benzyloxy-6-diethoxymethyl-5,6-dihydropteridine, and this is oxidized to 2 - amino - 4 - benzyloxy - 6 - diethoxymethyl pteridine; (2) 2,4,5-triamino-6-hydroxy pyrimidine (isolated from its sulphate) and 2-bromo-3,3-diethoxy-propionaldehyde (or the 2-chloro compound) give 2-amino-4 - hydroxy - 6 - diethoxymethyl - 5,6 - dihydropteridine which is oxidized to 2-amino-4-hydroxy - 6 - diethoxymethyl pteridine; (3) 2,4,5 - triamino - 6 - hydroxy - pyrimidine hydrochloride and 2-bromo-3,3-dibenzyloxypropionaldehyde give 2 - amino - 4 - hydroxy - 6 - dibenzyloxymethyl - 5,6 - dihydropteridine which is oxidized to 2-amino-4-hydroxy - 6 - dibenzyloxymethyl pteridine; (4) and (5) the final product of (2) is acetylated and propionylated to 2-acetamido- and 2-propionamido-4-hydroxy-6-diethoxymethyl pteridines respectively; (6) the acetamido product of (4) is hydrolysed with formic acid at room temperature to give 2-acetamido-4-hydroxy-6-formyl pteridine. Other compounds of formul  (1) and (2) in which the acyl group when present is alkyl-, aryl- or aralkyl-carbonyl also are referred to. Specifications 785,354 and 785,355 also are referred to.
Patent GB-571307-A (GB)
Title: Improvements relating to protective treatment for metal surfaces
IPC: C23C22/60
Filed: 1943-11-08
Abstract: 571,307. Coating metals. BUTTONS, Ltd., CHECKLEY, A., and MEALINGS, G. Nov. 8, 1943, No. 18504. [Class 82 (ii)] Metal surfaces are given a protective coating by immersing them in a solution of potassium bichromate and a hydroxide, preferably sodium hydroxide, at a temperature of 180‹-380‹ F. Usually 1 lb. of bichromate is added to 2 pints of water and then 1 lb. of sodium hydroxide, and the solution brought to the boil before use. Alternatively, up to 4 parts of hydroxide to 1 part of bichromate may be used. To produce a darker shade in the coating, 4-8 ounces of potassium carbonate per gallon of solution may be added to the bath. The coated articles may be given a further coating of oil, wax or lacquer.
Patent GB-121350-A (GB)
Title: Improvements in and relating to Speed Controlling Mechanism for Phonographs and like Machines.
Filed: 1917-12-13
Abstract: 121,350. Marks, E. C. R., (De Camp & Sloan, Inc.). Dec. 13, 1917. Actuated by speed regulators; wheels shifted to rub on fixed brake surfaces; indicators, applications of.-In speed-regulating brake apparatus for phonographs &c., of the kind in which the hand regulator moves over a speed-indicating scale and controls the position of a brake relatively to a disk axially movable by a governor, means are provided in, the linkage between the brake and the hand regulator whereby the brake may be set initially to ensure that the hand regulator gives a correct reading on the speed indicator scale. The disk 12 is moved axially by the centrifugal action of the revolving masses 10, and engages a stationary brake block 20 carried by an arm 13, forming part of a stamped metal plate 25 pivoted on a pin 14. Behind the plate and also pivoted on the pin 14 is mounted a block 22, Fig. 3, to which the brakecontrolling arm 15 is secured by a socket 23 and screw pin 24. The arm 15 is actuated by a cam slot in a drum 17 which bears indicating numerals on its rim and is rotated by a toothed wheel on the shaft of the knob 16. The position of the brake arm 13 and plate 25 relatively to the controlling-arm 15 is adjusted by rotating the milled head of a screw pin 29 which has shoulders engaging above and below a horizontal flange 26 formed by bending the plate 25, and is threaded at its lower end into the block 22. A spring 32 tends to separate the flange 26 and block 22. The flange 26 and block 22 are slotted to permit the insertion of the pin 29, and the control arm 15 projects through a slot 28 in the plate 25 thereby limiting the relative movement. The pin 29 projects through an aperture in the motor board 21.
Patent GB-770266-A (GB)
Title: Tape conveyor
IPC: B65G23/06
Filed: 1955-06-28
Abstract: 770,266. Endless band conveyers. STOFFEL, M. June 28, 1955 [Dec. 4, 1954], No. 18606/55. Class 78 (1). [Also in Group XXIV] In a conveyer comprising an endless perforated tape and a toothed driving element therefor, the teeth of the driving element are spreadable at least in the direction of movement, and means are provided for maintaining each tooth in the spreaded condition to engage the wall of the perforation at most only so long as the tape is snugly superposed on that portion of the driving element adjacent to the tooth under consideration. In one form, Fig. 1, each tooth is formed by the outer ends of a pair of two-armed levers 12 pivoted at 13 to a wheel which forms the driving element, the ends 11 projecting through apertures in the rim 7 of the wheel to engage the perforations 9 in the tape 8. A stop 19 limits movement of the ends 11 of each pair of levers 12 towards each other under the action of a spring buffer 17 acting on a roller 16 at the pivot 15 of toggle links 14 connecting together one lever 12 of each of two adjacent teeth. The ends 11 of each pair of levers are forced apart to engage the walls of the perforations by the rollers 16 engaging a stationary cam 20 arranged only where the tape 8 snugly engages the rim 7. In a second form, Fig. 4, the ends 11 of each pair of levers 12 are normally forced apart to engage the walls of the perforations by spring-urged plungers 25 acting through pins 24 on the inner ends of the levers, which are held in engagement with the pins 24 by relatively light springs 22. Flanges 24a on the pins 24 engage a stationary cam 20 at the portions of their travel where it is desired to move the ends 11 towards each other out of engagement with the walls of the perforations 9. In a third form, Fig. 8, each tooth is formed by the ends 11 of a pair of levers 32 held in engagement with a cam 34 by a leaf spring 33, cam 34 being controlled by a lever 36 whose outer end has a pin engaging a transverse slot in a ram 40, in turn controlled by a roller 47 urged against a stationary cam 48 by a spring 44. In a fourth form, Fig. 10, each tooth consists of a steel sleeve 59 having a tapered bore and two diagonally arranged longitudinal cuts to form four springy jaws, one front, one rear, and one at each side. The jaws of each tooth are spread apart to engage the walls of the per. forations by a plunger 61 acted on by a spring 62, the plunger being retracted where the tape leaves the driving wheel by a solenoid 56 which is energized by the engagement of a pair of insulated brushes 65 with a pair of bus-bars 67 on an insulated stationary track 68. In the modification of Fig. 12, the plungers 611 are retracted by springs 62<SP>1</SP> and are projected to spread the jaws of the sleeve 59<SP>1</SP> by a follower roller 70 engaging a stationary cam 71, the plunger being prevented from rotating by an irregular shaped member 72 on its sliding within a cylinder 581 of corresponding cross-section. The teeth formed by the sleeves 59 or 591 may be rectangular, round or square in cross-section.
Patent GB-221319-A (GB)
Title: Shorthand typewriting machine
IPC: B41J3/26
Filed: 1923-07-21
Abstract: 221,319. Howard, E. July 21, 1923. Stenographic type-bar machines; keyboards.- Type-bars arranged in column are operated one or more at a time by depressing one or more keys arranged in sets, each associated with a set of type-bars, the sets of type-bars bearing similar types and being arranged to print in different longitudinal zones on the paper. Type-bars T, Fig. VIII, guided horizontally by means of bars 13 passing through slots 11, or mounted on parallel links, are operated by key-levers 16 which are mounted on spindles 15, and are provided with arms 17 engaging notched lugs 18 on the typebars. Springs 21 hold the arms in contact with pads 22. The type-bars are arranged in twentyfour columns of four, eight columns forming a set associated with. a set of thirty-two keys in the keyboard. The type-bars bear types 2, which may be upper-case types, or the special types described below. The keys are arranged in twelve columns of eight, each column being associated with one pair of columns of type-bars, and alternate keys 16a, 16b .. in a column being associated with alternate columns of the pair. The keys are at the normal distance apart, and, to permit close horizontal spacing of the columns of type-bars, the arms 17 and the keys, except those in the two middle columns, are formed on nested yokes mounted on the spindles 15, five of the keys 16a - - 16a4, and their yokes 37 - - 41 being shown in Fig. IX. The keys 16a5 in the two middle columns are in alignment with their arms 17. The keyboard contains three sets of keys, each set containing four columns of eight, and representing most of the letters of the alphabet, as well as compound characters which are not represented in the other sets. The keys may be differentiated by colour. By convention, keys in certain groups each represent either of two characters, according as to whether or not they are depressed in conjunction with another key in the group. Types.-The types 2, Fig. II, are arranged in three identical sets, the first set only being shown. The type-faces consist of straight, dotted, and curved lines. The type-faces in the first pair of columns are horizontal, the typefaces in the second and third pairs inclined in opposite directions, and the type-faces in the fourth pair are inclined, and formed of T or L- shape. The type-faces in each pair of columns are similar but of different widths. Letter-spacing mechanism.-The type-bars T are formed with recesses 24 receiving two universal bars 23 carried by a pair of rocking arms 26 connected to line-spacing mechanism. Alternatively, the universal bars may be carried by slides, or mounted on separate pairs of rocking arms.
Patent GB-333683-A (GB)
Title: Improvements in junction boxes, or cases for electric switches, ceiling roses and the like
IPC: H02G3/20
Filed: 1929-06-19
Abstract: 333,683. Wildy, E,. L., and Liverpool Electric Cable Co., Ltd. June 19, 1929. Junction boxes; bases for couplings.-An insulating element 1, Figs. 4, 5, which can be used interchangeably as a junction box, base for coupling, &c. is of rectangular form and has a circular recess 3 in its outer face in which the coupling &c. can be secured and a chamber 6 in the opposite face for incoming cables, this chamber surrounding the recess and its inner wall 7 forming the wall of the recess. This wall is perforated at 11 - - 14 to allow cables to enter the recess for connection to the ceiling rose, coupling &c. secured in the recess. The thinned portions 9, 10 can be cut away to allow cables to enter the box. The recess is provided with slots 17 and a cover 15 with lugs 16 so that the cover may be secured in position by a bayonet joint action,
Patent GB-844220-A (GB)
Title: Improvements in or relating to abrasive articles
Inventor: SMITH DOMINIC
IPC: B24D3/00
Filed: 1957-06-17
Abstract: 844,220. Abrasive articles. BAKELITE Ltd. June 6, 1958 [June 17, 1957], No. 18963/57. Class 60. An abrasive article is prepared by applying to a backing material a layer of a thermosetting synthetic resinous adhesive mixture consisting of an epoxide resin together with up to 49% of a phenol-formaldehyde resin, spreading abrasive grit on the resinous layer and heating the assembly to cause the resin to harden. The backing material may be fabric, paper, or vulcanized fibre board which may be in the form of a disc. The abrasive grain may be aluminium oxide and may be applied to both sides of the backing material. The epoxide rosin may be a polyglycidyl ester of a polyhydric phenol e.g. bisphenol A, or a polyhydric alcohol.
Patent GB-641966-A (GB)
Title: Improvements in or relating to viscosimeters
IPC: G01N11/08
Filed: 1947-07-17
Abstract: 641,966. Viscosimeters. K-C-M CO. July 17, 1947, No. 19109. Convention date, March 26, 1942. [Class 106 (ii)] [Also in Group VIII] A viscosimeter comprises coaxial. inner and outer members 46, 45, respectively, in predetermined fixed relation to each other leaving a continuous annular space 47 between the members of predetermined small dimensions, a pressure chamber 40, 41 at each end communicating with a single differential pressure gauge, or with separate pressure gauges, and means 34, 56 for supplying and discharging the liquid to be measured at constant velocity. The inner member 46 is supported in a bearing 50 formed in a spider 52 secured to the body 36, and the outer member 45 comprises a sleeve within the body. It is shown mathematically that at constant velocity the pressure difference between the chambers 40, 41 is a direct measure of the viscosity of the liquid. In Fig. 4, the viscosimeter 106 is shown applied to the control of the viscosity of a papercoating composition or colour. This liquid is supplied to a tank 101, and by a pipe 102 to the press 103. The viscosimeter 106 is fed from the pipe 102 by a pump 105, and a gauge 108 measures the pressure difference between the pressure chambers in the viscosimeter. The pressure difference operates a valve in an air supply line 109 to control the air supply through a pipe 110 to a throttling valve 111 in a pipe 104 supplying water or other diluent to the tank 101. The air supply system may incorporate safety valves 112, 113. A practical constructional form of apparatus is described and shown wherein the pump is of the positive displacement screw type having a number of stages, and driven through a variablespeed drive. Before passing to the viscosimeter, the liquid is strained by a power-driven rotary strainer. On discharge from the viscosimeter, the liquid passes through a flow meter.
Patent GB-1011394-A (GB)
Title: Thermostatic electrical switch
IPC: H01H37/28
Filed: 1962-05-17
Abstract: 1,011,394. Thermal switches. TEXAS INSTRUMENTS Inc. May 17, 1962 [May 29, 1961], No. 19117/62. Heading H2B. A thermally responsive switch comprising a snap - acting bimetallic disc 47 operating a contact - carrying spring arm 29 through a pin 21 has a sufficient clearance K between pin 21 and arm 29 for creep action movement of the disc 47 not to be transferred to arm 29, but for the snap-action movement to be transferred thereto, and the clearance K is initially set by adjustment of the arm 29 and of the fixed contact 27. The contact supports 10 and 12 are bendable to effect such pro-adjustments, a screw 25 being provided to assist the bending of fixed contact support 10. A metal cup 41 holds disc 47 in position against the insulating switch body, and a cover 17 is held by screws 39 against the upper flanged body part. The switch is made automatically resettable or manually resettable as required.
Patent GB-820325-A (GB)
Title: Extrusion machine and process
Inventor: WILDE BERTRAND ERNEST
IPC: B30B11/22
Filed: 1956-06-21
Abstract: 820,325. Extrusion machines. MONSANTO CHEMICALS Ltd. May 13,. 1957 [June 21, 1956], No. 19218/56. Class 87(2). An extrusion machine comprises a beam having near each end a roller to press plastic material e.g. rubber chemicals mixed with polyisobutylene, through an orifice, the beam being freely mounted so that it may "rock" enabling the rollers to move towards and away from the orifice. Either the beam or the orifice may rotate. A rod 1, rigidly attached to a base 2, has a rotatably mounted cylinder 3 having a plate 5 and a plate 9, mounted on arms 8, the plates 5, 9 forming between them an annular opening bridged by a perforated plate or gauze 10 surrounded by an enclosing wall 13. The rod 1 has a fixed bar 24 having two posts 25 passing through and thus preventing rotation of a beam 14 having at each end a pivotally mounted frustro-conical roller 15. The rod 1 passes through the beam 14 and a fulcrum, under the adjustable action of a spring 22, forces the rollers 15 into contact with the perforated plate 10 whilst allowing the beam 14 to rock an amount controllable by nuts 26 on the posts 25. Guides 28, 29 for the plastic material are attached to the bar 24 and the rollers 15 have scrapers 17. In operation, the cylinder 3 is rotated, plastic material is fed on to the perforated plate 10 and, as rotation continues, is forced by the rollers 15 through the perforations to fall on to a tray 31 mounted on the cylinder 3. The strands may be cut into pellets by stationary knives, or, if the beam rotates and the perforated plate is stationary, by rotating knives. Specification 736,969 is referred to
Patent GB-828411-A (GB)
Title: Driving device for guiding rolled wire into a coiler
IPC: B21C47/34
Filed: 1958-06-16
Abstract: 828,411. Winding and reeling. LEISTIKOW F. W. R. (Huttenwerk Rheinhausen A.G.). June 16, 1958, No. 19235/58. Class 83 (4). A driving device for guiding rolled wire 2 into a coiler 4, 5 comprises a guide tube 3 for the wire which is bent in the range of change of direction of the wire and has a gap 9 at its outer side wall which co-operates with an end flange 8a of a rotatable and suitably driven driving disc 6 to form an enclosed guide channel for the wire, the speed of rotation of the driving disc 6 being sufficient to develop a frictional pull on the wire.
Patent GB-1070073-A (GB)
Title: Apparatus for regulating the working depth of a cultivating device
Inventor: KOENING WALTER
IPC: A01B63/112
Filed: 1964-05-08
Abstract: 1,070,073. Tractor power lift mechanisms. KLOCKNER - HUMBOLDT - DEUTZ A.G. May 8, 1964, No. 19259/64. Heading A1P. A tractor power lift mechanism incorporating draft control is characterized in that the impulse for operating the draft control is derived from the horizontal forces only that are present in the lift linkage, the vertical forces (e.g. the weight of an attached implement) being arranged to operate against a fixed point on the tractor. As shown in Fig. 1, a draft control impulse in the draft link 10 moves a lever 4, pivoted at 3 on the tractor, against a biasing spring 5, the lever, in turn, operating a control valve of a hydraulic system. On the lever 4 the pivot 3a for the link 10 is used with a fully mounted implement whereas the pivot 3b is used with a semimounted or trailed implement. In an embodiment the lifting arms operate on the upper link which is also used for transmitting draft control impulses. In this case the tractor pivot point of the upper link is mounted on a member arranged for sliding movement with respect to the tractor against a spring bias.
Patent GB-478059-A (GB)
Title: Improvements in collapsible sliding doors
IPC: E06B3/92
Filed: 1936-07-11
Abstract: 478,059. Gates. SNARE, E., and CASTON & CO., Ltd. July 11, 1936, No. 19263. [Class 45] A collapsable gate for use as a sliding fireresisting door of the kind comprising separable leaves joined to pickets which are interconnected by lazy-tongs is provided with wedge-shaped guide strips 4 on each leaf engaging recessed uprights 5 on the adjacent leaf. Bearing strips 7 are secured to the leaves at the base of the recesses to engage the guides which are concealed from the face of the door. Vertical filling-pieces 8 are secured to the free edges and inner faces of the door leaves to prevent separation when sliding. The edges of the leaves may interlock when the door is closed as described in Specification 447,696. The sliding engagement may be effected by rollers and grooved bars.
Patent GB-385881-A (GB)
Title: Improvements in filling devices for packing machines
IPC: B65B39/14
Filed: 1932-07-08
Abstract: 385,881. Filling-devices for packing- machines. HESSER MASCHINENFABRIK AKT.-GES., F., 99, Olgastrasse, Cannstatt, Stuttgart, Germany. July 8, 1932, No. 19315. Convention date, Aug. 26, 1931. [Class 94 (i).] The filling funnel 12 and the container P move together during the filling operation. As shown, each funnel 12 is mounted on a gimbal 18 carried by a slide 16 on a head 11 rotating with a shaft 10 outside the rotary container table 2. The funnels are lowered into the containers P and lifted again by a cam 21 and rod 24, and also shaken.
Patent GB-956328-A (GB)
Title: Method for the manufacture of polyvinyl laminates
Inventor: SARGENT EDWARD HENRY GEORGE
IPC: B32B27/00
Filed: 1962-05-18
Abstract: 956,328. Laminates. DRAYTON RESEARCH Ltd. Jan. 9, 1963 [May 8, 1962], No. 19332/62. Heading B5N. A reinforcing layer, e.g. of glass-fibre reinforced polyester resin, is bonded to a layer of unplasticized polyvinyl chloride by applying to the latter layer a thixotropic paste containing a solvent such as tetrahydrofuran, ethylene dichloride, methylene chloride or cyclohexanone capable of readily breaking its surface, applying the reinforced layer before the solvent has completely evaporated, and curing the resin. The thixotropic agent in the paste may be a complex of bentonite with a quaternary ammonium compound, or finely divided silica. The polyester resin used may be a condensate of propylene glycol and maleic or maleic and isophthalic acid containing 35% of styrene, and the resin and glass fibre may be applied in alternate layers.
Patent GB-184039-A (GB)
Title: Improvements in or relating to means for securing windings in electrical transformers
IPC: H01F27/30
Filed: 1921-07-18
Abstract: 184,039. Brush Electrical Engineering Co., Ltd., and Scholefield, P. W. July 18, 1921. Transformers.-The coils are held in place by a pair of annular bearing-plates a, b adapted to be separated by springs e, movement of the plates towards each other being prevented by the engagement of racks c on one plate with free wheels d on the other. In a modification, the springs tending to separate the plates are combined with the free wheels, thereby permitting the plates to be placed initially in direct contact with each other. In another modification, one of the plates is provided with bent-up marginal portions to accommodate the springs. The plates may be high-tension winding i of a transformer, as shown in Fig. 7, or they may be placed at either end of the winding.
Patent GB-955144-A (GB)
Title: Feeding and marshalling machines
Inventor: THOMPSON HAROLD DEWHIRST
IPC: B65B35/54
Filed: 1960-06-01
Abstract: 955,144. Batching sweets. JAMES PASCALL Ltd. May 11, 1961 [June 1, 1960], No. 19437/60. Heading B8A. The pushers of chains 3 entrain sweets 2 from respective hoppers 1 and deliver them down shoots 7. The sweets fall on to the single shown belt so that they are conveyed between respective fixed walls 9 till they meet fixed wall 10. The sweets are discharged from belt by transverse endless chain 11, each pusher of which entrains a batch of the different sweets one from each channel and delivers it along the guide plate 16.