baber/WOPTO huggingface dataset:
Patent GB-923348-A (GB)
Title: Production of alkyl-substituted pyridines
Inventor: HARGRAVE KENNETH RAYMOND
IPC: C07D213/09
Filed: 1961-02-17
Abstract: Alkyl-substituted pyridines are produced by heating together ammonia and an alkoxyaldehyde of formula R1OCHR2CHR3-CHO, in which R1 is a primary alkyl group and R2 and R3 are primary alkyl groups or hydrogen.  The process is preferably carried out at a temperature of 300-500 DEG C. in the presence of a condensation catalyst. Suitable alkoxyaldehydes are, for example, 3-propoxypropionaldehyde, 3-propoxybutyraldehyde or methoxyvaleraldehyde.  Suitable catalysts are, for example, those containing silica and/or alumina.  The catalysts may also contain titania, zirconia, ceria or thoria and zinc, cadmium, tin, lead, tungsten, nickel, cobalt, chromium, molybdenum, iron, copper, palladium or silver or a compound thereof. In the examples (a) 3-propoxypropionaldehyde is reacted with ammonia to give b -picoline and (b) 3-propoxybutyraldehyde is reacted with ammonia to give 3,4-lutidine.
Patent GB-797709-A (GB)
Title: Improvements in or relating to the manufacture of ignition distributors for internal combustion engines
Inventor: BLAZEY SIDNEY HENRY
IPC: B21D39/04
Filed: 1956-02-24
Abstract: 797,709. Making I.C. engine ignition distributers. GENERAL MOTORS, Ltd. Jan. 25, 1957 [Feb. 24, 1956], No. 5922/56. Class 83 (2). A method of making an internal-combustion engine ignition distributer assembly comprises the steps of making a bowl-shaped distributer casing as a slightly over-size metal pressing, fitting a tubular metal shank in a central opening in the base of the casing, heating the casing and shank to brazing temperature, brazing the casing to the shank, and passing the brazed casing and shank assembly through a sizing die, to align the casing coaxially with the shank and form the casing to exact shape and size. A hollow shank 5 turned from mild steel tube is inserted in a neck 4 of a pressed mild steel bowl 3, of slightly larger diameter than the final dimension, until a knurled portion 6 engages the neck 4. The temporary assembly is then heated to brazing temperature and brazed at 7. The bowl and shank are then mounted on a suitably stepped punch and passed through a polished chromium-plated sizing die-ring which reduces the bowl to its correct final size and brings the bowl and shank into true alignment. The bowl is then trimmed to exact length and any slots or holes necessary formed therein. A spindle 9 carrying a distributer rotor assembly 10 and a centrifugal adjustment device 11 is journalled in sintered bearing bushes 17, 18 in the shank 5, felt discs 21, 23 impregnated with oil keep the spindle 9 lubricated through felt tongues 19. A contact breaker plate 12, interrupter 13, and cap 14 having connections 15, 16 for the ignition wiring harness are then added.
Patent GB-716058-A (GB)
Title: An improved clamping lock for pit-props
IPC: E21D15/28
Filed: 1952-03-07
Abstract: 716,058. Pit props. GUTEHOFFNUNGSHUTTE OBERHAUSEN AKT.-GES. March 7, 1952 [March 7, 1951], No. 6028/52. Class 20 (2) Pressure plates 3, 8 supported by the lower prop part 10 are clamped against the upper prop part 11 by two rockable loop members 1, 2 surrounding the pressure plates and upper part 11, clamping being effected by a wedge 5 interposed between the loops 1, 2 on one side and a resilient body, e.g. rubber 7 or a steel spring being interposed between them on the other side. Interengaging projections and recesses on the wedge and loops respectively permit positive unc'amping by the wedge whereupon the rubber body 7 returns the loops to their original positions. A vertically movable wedge 4 operated by a cross wedge 6 permits compensation for wear and tolerance.
Patent GB-377914-A (GB)
Title: Improvements in or relating to self-retarding mechanical percussion fuses for projectiles
IPC: F42C1/08
Filed: 1931-07-30
Abstract: 377,914. Projectile fuzes. SCHWOB FRERES ET CIE, SOC. ANON., La Chaux-de-Fonds, and VARAUD, A., 109, Route de Lyon, Geneva, both in Switzerland. July 30, 1931, No. 6037/32. Addition to and divided on 371,247 (under which a Specification was laid open to inspection under Sect. 91 of the Acts, Aug. 8, 1931). [Class 9(i).] Relates to delay-action projectile fuzes having a striker and a weight slidably mounted in two separate longitudinal passages and so interconnected that, as described in the parent Specification, the momentum of the projectile must be absorbed by the obstacle before the fuze can operate. According to the invention, the striker 3 and the weight 5 are interconnected by an oscillating lever 11 engaging on one side in a notch 6 in the weight 5 and on the other side holding the striker back against a spring 13. On discharge, a centrifugal bolt 10 releases the weight 5 ; on impact the weight moves forward by inertia, and the lever 11 slips from the notch 6 into a second notch 7 also in the weight 5, while the striker is temporarily pressed back against a stop 14 ; and when the shock of impact is over, the spring 13 drives the striker 3 forward and the weight 5 backward until the striker slips past the lever 11 and is forced on to the percussion cap 12.
Patent GB-286249-A (GB)
Title: Improvements in or relating to balanced double seated valves
IPC: F16K39/02
Filed: 1928-02-27
Abstract: 286,249. International General Electric Co., Inc., (Assignees of Allgemeine Elektricitõts-Ges.). March 1, 1927, [Convention date]. Closure members.- A balanced doubleseated valve comprises valve members a, b which are movable in opposite directions and are each separately balanced by a balancing piston h, i. The pistons may be in the form or interfitting bell-shaped members h, i forming a pressure chamber k between them, the pressure fluid having access to the chamber through apertures in a central guide tube, as shown. The balancing pistons may, however, be disposed on opposite sides of the valves. The valve members a, b are moved equally in opposite directions from a rod f and lever e by means of lever arms and an adjustable link g which may have a slight lost-motion included.
Patent GB-1092721-A (GB)
Title: Measuring instruments
IPC: G01N30/86
Filed: 1965-02-11
Abstract: 1,092,721. Recording-apparatus. SIEMENS A. G. Feb. 11, 1965 [Feb. 11, 1964], No.6065/65. Heading G1J. Recording apparatus in which a dot is printed for each maximum value measured in a "null" system having a balancing potentiometer 1 operated by a balancing motor driving its slider arm 3 comprises a pawl 9 controlled by an electromagnet 19 engaging a ratchet wheel 8 on the motor shaft 2. The slider arm 3 turns anti-clockwise until a maximum value is reached whereupon it tends to reverse. The increased pressure on the pawl 9 trips the motor and after a predetermined delay a dot is printed. Then the electromagnet 10 releases the pawl 9 from the ratchet wheel 8, the motor is switched on and drives the arm 3 clockwise to a balanced or zero position or until it reaches an abutment 11 and then the electromagnet 10 releases the pawl 9 to re-engage the ratchet wheel 8.
Patent GB-475239-A (GB)
Title: Improvements in multiplex telephony and the like
IPC: H04J3/18
Filed: 1937-03-01
Abstract: 475,239. Multiplex transmission. HENROTEAU, F. C. P. March 1, 1937, No. 6080. Convention date, Jan. 16. [Class 40 (iv)] [Also in Group XL] In a system of the kind in which elementary portions of several messages are recorded and are then reproduced in succession at a high speed for transmission, recording and reproduction at both ends of the system are effected by " kinescopes " in which a soundmodulated or signal-modulated cathode ray makes a temporary trace on a fluorescent screen and " iconoscopes " which comprise a screen formed from innumerable photo-electrically charged condensers which are scanned by a cathode ray. The sound traces made by kinescopes corresponding to several channels are optically projected onto the screen of an iconoscope which is completely scanned in the time taken by the rays of the kinescopes to make a single traverse. The variable currents produced by the discharge of the elementary condensers, or by secondary emission may be used for transmission. In the latter case use is preferably made of electron multipliers. The resulting currents at the receiving end produce a number of fluorescent record traces on the screen of a kinescope which is scanned in two directions and these traces are transferred to iconoscopes individual to the respective channels. To avoid waste of time while the scanning ray is moving from one record trace to the next, several kinescopeiconoscope groups may be arranged to work together as shown in Figs. 2 and 4. The voltage controlling the vertical deflection acts in the same way on all the iconscopes but that controlling the horizontal deflection becomes effective on each of them in turn owing to the effect of initial bias voltages provided by a potential divider. Transmission may be effected by carrier waves of a length of a few centimetres.
Patent GB-578123-A (GB)
Title: Improvements in the casting of metals
IPC: B22D13/10
Filed: 1943-04-15
Abstract: 578,123. Casting-machines. FORD MOTOR CO., Ltd. April 15, 1943, No. 6089. Convention date, May 23, 1942. [Class 83 (i)] Electricity, heating by.-A centrifugal casting- machine has a portion of the metal in the mould heated by induction. The mould 8, 9 is held in a holder 15, which can be rotated by its shaft 16, by centrifugal locks 17 and the part 8 is surrounded by a water-cooled, induction-heating coil 21 which is energized while pouring and while the body 12 solidifies. When the axis of rotation is not the same as that of the body, the coil 41, Fig. 2, is energized by slip rings 44. The central reservoir 39 may feed a number of moulds 38.
Patent GB-490771-A (GB)
Title: Improvements relating to the manufacture of compound glass and other laminated materials
IPC: B32B17/10
Filed: 1937-03-02
Abstract: Water-immiscible rapid solvents for cellulose derivatives and other plastic materials used in making compound safety glass consist of a water-immiscible organic liquid or a mixture of water-immiscible organic liquids, which boils at above 145 DEG  C., is completely miscible with the plastic material in all proportions, and 10 ccs. of which will dissolve ,4 gm. of the plastic within 5 minutes.  A table shows the solvent effect of (a) 90 ccs. amyl lactate mixed with 10 ccs. amyl acetate, (b) 80 ccs. benzyl formate mixed with 20 ccs. dichlorethane, and (c) benzyl formate, upon cellulose nitrate, cellulose acetate, and ethyl cellulose.
Patent GB-410585-A (GB)
Title: Improvements in seal padlocks
IPC: E05B39/02
Filed: 1933-03-01
Abstract: 410,585. Seal padlocks. COOPER & SON (WOLVERHAMPTON), Ltd., R., KEATES, F. A., and CULLWICK, A. S., Atlas Works, Church Lane, Wolverhampton. March 1, 1933, No. 6204. [Class 44.] A seal padlock A is provided with a sliding plate D and a fixed plate E which supports a sheet of paper extending across the keyslot e. A pin G is secured to the plate D and slides between the end of the casing A and a shoulder c<2> provided on the plate E. This pin is outside the shackle B and holds the plate D until the shackle is lifted. The top portion of the plate E is flanged forwardly to leave the space in which the pin G slides. The latter may be screwed into the plate D and the head of the screw afterwards filed off. In a modification, a lug on the plate D is bent over the top of the lock case, and has a hole through which the end of the shackle passes to hold the plate D. In a further arrangement, the plate D slides vertically, and the pin G is held by a hook on the pivot end of the shackle, when the latter is in the locked position.
Patent GB-286270-A (GB)
Title: Improvements in and relating to insulators
IPC: H01B17/12
Filed: 1928-02-28
Abstract: 286,270. British Thomson-Houston Co., Ltd., (Assignees of Thomson, E.). March 2, 1927, [Convention date]. Insulators.-To prevent electric discharge. due to dust, over the surface of an insulator, such as a strain insulator or a spark plug, projecting quartz strips are embedded in the insulator surface so as to extend transversely to the potential gradient over the surface. The figure shows a strain insulator comprising metallic members 10, 11 interlinked through insulating material 12. Projecting quartz rings 15 are embedded in the cylindrical surface of the material 12. Modified constructions of the quartz rings comprise helical strips, staggered short strips, and staggered strips of length greater than a semi-circle.
Patent GB-485792-A (GB)
Title: Improvements in or relating to electric welding tongs
IPC: B23K11/28
Filed: 1937-03-02
Abstract: 485,792. Electric welding; switching systems. KELLER & KNAPPICH GES. March 2, 1937, No. 6258. Convention date, March 6, 1936. [Class 83 (iv)] [Also in Group XXXV] In electric spot-welding tongs in which the control contacts are closed by hand only when the electrodes have been pressed together with a definite adjustable pressure by hand with simultaneous compression of a spring, a maximum current relay, on the attaining of the predetermined maximum current strength, closes a control circuit containing the control contacts and also an auxiliary contact which interrupts the primary circuit and at the same time maintains the control circuit closed until the control contacts are again separated by hand. The copper electrodes 3, 4 are respectively carried by pivoted jaws 1, 2, of which the jaw 2 is integral with the handle 6, and the jaw 1 is carried bv a lever 7 movable over a rod 13 secured to the handle 8 and separated by a spring 12 from an adjustable nut 14 screwed on the rod 13. Between the ends of the spring and the lever 7 and nut 14 are mounted plates carrying contacts 17, 18 in the control circuit of the welding transformer 23. On pressing together the handles, which are spring-opened, the electrodes engage the work, whereupon further pressure on the handles compresses the spring 12 until the contacts 17, 18 are engaged so as to initiate welding. The control circuit containing the contacts may comprise the secondary circuit of a second transformer 33 so as to step down the mains voltage of 220 to about 12 volts. When the contacts are engaged, coil of relay 34 is energized so as to connect contacts 31 by arm 31<1> and so close the welding circuit. When welding is completed a maximum current relay 21 consisting of an open soft iron ring arranged on the secondary lead of transformer 23 attracts a weighted contact arm 24 so as to operate a contact spring 27<1> and thus close contacts 27, 28. Coil of relay 22 is thus energized and armature 32<1> attracted so as to break the circuit of relay 34 at 29, 30 and thus open the welding circuit. The armature 32<1> is thus brought into contact with the contact 32 and when the contacts 27, 28 open, current through coil of relay 22 is maintained through contact 32, until the circuit is broken by hand manipulation of the tongs. The flexible leads 25, 26 to the electrodes may be enclosed in rubber pipes through which a current of water is led for cooling purposes, and the handles may be coated with insulating material. The transformer and switch gear may be arranged in a container moved on rollers or suspended so as to move the apparatus from one position to another. The Specification as open to inspection under Sect. 91 shows a form, Fig. 5 (Cancelled), in which the contacts 17<1>, 18<1> are directly connected to the handles. This subject-matter does not appear in the Specification as accepted.
Patent GB-435914-A (GB)
Title: Improvements in electric variable resistances
IPC: H01C10/28
Filed: 1935-02-27
Abstract: 435,914. Variable resistances. SALAMON, L., 11, Tarcali Utca, and STERN, G., 7, Marko Utca, both in Budapest. Feb. 27, 1936, No. 6282. Convention date, March 1, 1934. [Class 37] The contact member of a variable resistance comprising a wire or layer 8 on a support 7, consists of a hollow roller 16 engaged by a spring 15, the roller having a circular ridge 17 for this purpose. Two or more roller contacts in radial alignment may be provided, the spring having extensions 20, 21, Fig. 4, engaging a frame 18 which presses a rod 19 on to the circular ridges of each roller.
Patent GB-1433067-A (GB)
Title: Apparatus for evaluating holographically reconstructed wave fields with two frequencies
IPC: G03H1/00
Filed: 1974-02-12
Abstract: 1433067 Holographic interferometry BBC BROWN BOVERI & CO Ltd 12 Feb 1974 [14 Feb 1973] 06291/74 Heading G1A Holographic interferometry is used to investigate the profile of an object.  In Fig. 1(a), a hologram is recorded by illuminating the object with a beam B(w 1  w 2 ) comprising two frequencies w 1 , w 2 , reference beams R 1 (w 1 ) and R 2 (w 2 ) being applied from different angles on to the plate H. In reconstruction, Fig. 1(b) reference waves of different frequencies w 1 <SP>1</SP>, w 2 <SP>1</SP> but identical orientations to the recording reference beams, are used and the reconstructed wave fields are focused on to a plane E by lens L. The phase of the fluctuating (beat frequency) light intensities at different points on the plane is investigated by a movable photo diode F 2 , photo diode F 1  providing a reference phase, to provide profile information about the object. In a second arrangement, Fig. 2 showing both recording and reconstruction, two holographic 'plates are used, one for one set of frequencies w 1 , w 1 <SP>1</SP> and the other for the other set of frequencies w 2 , w 2 <SP>1</SP>. In this arrangement the same source can be used to provide the two reference beams, e.g. using a two-frequency laser or mechano-optical modulation of a laser beam.  An array of detectors, associated with a plurality of phase meters, may be used. An x-y recorder may be coupled to the detector to map the object surface.
Patent GB-697123-A (GB)
Title: A process of preparing n-[2-alkyl-4-aminopyrimidyl(5)]-methyl-4-methyl-5--a-hydroxyethylthiazolium compounds
Filed: 1951-03-16
Abstract: N - {21 - alkyl - 41 - aminopyrimidyl (51)} - methyl - 4 - methyl - 5 - b  - hydroxyethyl (or b -acyloxyethyl) thiazolium compounds are obtained by oxidizing in acidic medium N-{21 - alkyl - 41 - aminopyrimidyl (51)} - methyl - 4 - methyl - 5 - b  - hydroxyethyl- (or b  - acyloxyethyl) - thiothiazolone (2).  Oxidation may be effected chemically, e.g. by means of hydrogen peroxide, nitric acid, bromine or chlorate, or electrolytically in acid medium.  N - {21 - alkyl - 41 - aminopyrimidyl (51)} - methyl - 4 - methyl - 5 - b  - hydroxyethyl - (or b -acyloxyethyl) thiothiazolone compounds are obtained by condensing 2-alkyl-4-amino-5-aminopyrimidene with g  - aceto - g  - halopropyl alcohol or its ester or 2-methyl-2-hydroxy-3 - acetyl - 3 - halotetrahydrofuran and carbon disulphide in the presence of a deacidifying agent and treating the resulting N - {2 - alkyl-4-aminopyrimidyl (5)} - methyldithiocarbamate with an acid.
Patent GB-924020-A (GB)
Title: Improvements in or relating to number plates, name plates, sign plates and like advertising devices
Inventor: MAST-INGLE HAROLD ROYDON
IPC: G09F7/08
Filed: 1961-02-21
Abstract: 924,020. Signs. MAST INDUSTRIES (PROPRIETIARY) Ltd. Feb. 21, 1961, No. 6376/61. Class 3 (2). A name or number plate comprises a carrier or base plate 1 provided with a series of apertures or a single elongated slot 2 bushed by at least one U-shaped flange member 5, 6 adapted to receive the tongues 4 of indicia 3 which are locked therein as by deformation by pliers 10, 12.
Patent GB-326330-A (GB)
Title: Improvements in fourdrinier paper making machines
IPC: D21F1/18
Filed: 1929-02-27
Abstract: 326,330. Milne, S. Feb. 27, 1929. Shaking-arpparatus for wire-cloths.-In shake mechanism for the breast roll end of Fourdrinier paper-machines where the breast roll and wire are vibrated independently of the tube rolls, the plate springs (either tension or compression), which carry the vibrating parts have a rate of natural vibration which is equal to or greater than the rate of the required maximum vibration. To take the strain of rapid reversal of the breast roll a dash-pot is used in the form of a large disc e, Fig. 3, applied to the end of the breast roll spindle b<1> and enclosed within a closely fitting stationary casing f supplied with oil. The connecting-rod for the shake mechanism is preferably connected in a line coaxial with the breast roll and may be bolted to the cover f' of the casing f. The supporting frame for the front of the machine may be stationary. The Provisional Specification refers to Specifications 128,425 and 180,504.
Patent GB-413797-A (GB)
Title: Means for altering the timing of electrical impulses more particularly for the grid control of vapour arc rectifiers
IPC: H02M7/15
Filed: 1933-03-02
Abstract: 413,797. Converting. ENGLISH ELECTRIC CO., Ltd., 28, Kingsway, London, CALVERLEY, J. E., Crescent Road, Rowley Park, Stafford, and BALL, R. D., Phoenix Works, Bradford, Yorkshire. March 2, 1933, No. 6389. [Class 38 (ii).] In a method of timing electrical impulses such as are applied to the grids of a mercury arc rectifier 2 for voltage regulation, wherein a synchronous motor 13 is used to drive a generator or a rotary distributer 11 for potentials derived from a battery 12, the stator windings 14 of the motor are fed through an induction regulator 15 whereby the phase of the current in the stator windings and therefore the angular position of the rotor is varied with respect to the phase of the supply network 1. A compound characteristic may be imparted to the output voltage of the rectifier by inserting on the A.C. side of the rectifier current transformers 19 the secondaries of which are shunted by a reactance 20 whereby an out of phase voltage proportional to the load is developed. This is caused to be added vectorially to the voltage of the stator windings 14 by connections as shown.
Patent GB-780164-A (GB)
Title: Improvements in or relating to tensioning devices, more particularly for coil winding machines
Inventor: BRODIE ERNEST HENRY
IPC: B65H59/04
Filed: 1954-03-05
Abstract: 780,164. Tension control means WARDRAY & CO.. Ltd. June 6. 1955 [March 5, 1954], No. 6521/54. Class 120(2) A tensioning device for wire &c. in coil winding machines comprises a reel or drum 15, a brake device 18 associated therewith and means responsive to the tension in the wire and operatively connected to the brake device 18 for controlling the rotation of the drum in accordance with the tension and is characterized in that the tension responsive means includes a pivoted member 20 having guide means 19 and connected to the brake device 18 by a resilient link 28, which consists of a pair of telescopically fitting, members, one member being connected to the pivoted member and one to the brake device having resilient means between them which acts normally to urge the members relatively one to the other in a direction to apply the brake device. The pivoted member may be urged by resilient means 24 to apply a predetermined tension to the wire &c. In operation wire is taken from the drum 15 and is led over the guide means 19 to a take-up, former 11. Any increase in tension is followed by a loosening of the brake and vice-versa. The resilient means between the telescopic members may consist of two springs one being weaker than the other to give a sensitive control of the tension and also allow immediate stoppage of the drum as the coil winding mechanism stops so that slack wire is prevented.