baber/WOPTO huggingface dataset:
Patent GB-229672-A (GB)
Title: Improvements in and relating to machines for casting dental fillings and like parts
IPC: A61C13/20
Filed: 1925-02-18
Abstract: 229,672. Mixon, T. A. Feb. 18, 1924, [Convention date]. Casting-machines. - A dental &c. casting- machine has the flask closing-member carried by an arm which can be swung clear of the flask while the latter is being heated, after which the arm is returned, this movement causing the flask to be automatically closed and compressed air to be blown therein to effect casting. The flask is positioned by a. ring 36 on a base 5 which also carries a column 6 supporting a fixed pillar 8 about which the arm 9 carrying the flask closure 12 mav be swung by the handle 29. The arm is pressed downwardly by a spring 10 and has one or more locating stops 24 engaging slots 30 in the column 6. The arm may be lifted to clear the slots by a cam 25 actuated by a handle 26. The cam may be so shaped that after lifting the arm 9 it automatically swings it clear of the flask. The arm is provided with a filter 32 to which air is delivered through a flexible pipe and from which the air passes by way of an adjustable reduction valve 33 to a chamber 21 provided with a pressure gauge. A sleeve 15 screwed into the chamber 21 is fitted with a sleeve 14 carrying the flask closure 12 which is provided with in asbestos or other packing 13. A valve 17 seating in the sleeve 15 is connected to the sleeve 14 and a spring 18 is mounted between the two sleeves. On movement of the arm 9 from the swung position, after the flask has been heated, the stops 24 align with the slots 30 thus allowing the spring 10 to apply the closure, this movement causing the sleeve 14 to open the valve 17 and allow the air to pass to the flask. Smaller flasks may be mounted on apertured distance-pieces.
Patent GB-546308-A (GB)
Title: Improvements in or relating to photographic sound recorders
IPC: G11B7/003
Filed: 1941-04-04
Abstract: 546,308. Optical sound recording. RADIO CORPORATION OF AMERICA. April 4, 1941. No. 4540. Convention date, April 4, 1940. [Class 40 (ii)] In sound recording apparatus in which only a component of a modulated light beam is used to impress a film, the other component of the beam is used for modulating. For example, in the arrangement shown, a polarizing prism 19 is placed against the slit 18 of the slit plate 17 and a quartz plate 20 is disposed between this and the objective 21, 22 which projects the beam on the film F, so that the film is only affected by a polarized component of the beam. The other component of the beam proceeds from the polarizer 19 in a deflected path to a reflector 24 and thence through lenses 25 to a photo-electric cell 26 for monitoring purposes. The polarization prism 19 may be replaced by a prism having an interface angle of 45 degrees and a dichroic reflecting surface of gold, silver, or eosin between the faces, so that one colour component goes to the film and another colour component to the monitoring device.
Patent GB-854632-A (GB)
Title: Manufacture of pyrazoles
IPC: C07D231/38
Filed: 1957-02-11
Abstract: The invention comprises 3-aminopyrazoles unsubstituted in the 1- and 5-positions, having in the 4-position a carboxyl group or functional derivative thereof and optionally substituted in the 2-position by an unsubstituted or substituted alkyl or aryl group; also salts of these; 3-amino-4-cyanopyrazol is however not claimed per se.  The pyrazoles are made by condensing hydrazine or a mono-substituted hydrazine with a derivative of a -cyano-a -formyl-acetic acid functionally converted in the acid residue and also optionally in the aldehyde residue.  The reaction between hydrazine itself and ethoxy-methylene-malodinitrile is excluded.  The substituent in the 4-position of the product can be converted into a free carboxyl or any functional derivative thereof (including salts).  The starting material can be a cyanacetic acid, ester, amide or amidine or a malonic dinitrile, substituted by a formyl group or enol ether, acetal or mercaptal thereof.  The substituent in the hydrazine group can be alkyl, hydroxyalkyl, aryl or haloaryl.  After-treatment of the 4-substituent can lead to an ester, halide, amide, thioamide or imino-ether group.  The 3-amino group can be acylated, e.g. acetylated or benzoylated.  The products can be converted into pyrazolo-pyrimidines as in Specification 835,918 and Specification 854,631.  The carboxylic groups form salts with alkali and alkaline earth metals.  The basic compounds form salts e.g. with hydrohalic, sulphuric, nitric, perchloric, phosphoric, formic, acetic, propionic, lactic, oxalic, succinic, malic, tartaric, citric, ascorbic, methanesulphonic, ethanesulphonic, isethionic, benzoic, salicylic, p-aminosalicylic, toluenesulphonic and naphthalenesulphonic acids. Examples show the preparation of the following 3-aminopyrazoles:-4-carbethoxy, 2-phenyl-4-carbethoxy, 2-phenyl-4-cyano, 2-phenyl-4-carbamyl, 2-isopropyl-4-carbethoxy, 2-isopropyl-4-carbamyl, 2-(p-chlorophenyl)-4-carbethoxy, 2-(b -hydroxyethyl)-4-carbethoxy, 2-(b -hydroxyethyl)-4-cyano, 2-(b -hydroxyethyl)-4-carbamyl and 2-phenyl-4-carboxy.
Patent GB-665923-A (GB)
Title: Arrangements for producing optical images by phase-contrast methods
IPC: C07C37/04
Filed: 1949-02-22
Abstract: 665,923. Microscopes. LEITZ GES., E. Feb. 22, 1949 [Nov. 20, 1948], No. 4798/49. Class 97 (i). In a system for producing optical images by the phase-contrast method at least two phase plates are located one behind the other in the rear focal plane of the objective, two of the plates having each an annular phasechanging aperture or an annular array of apertures, corresponding to those in the illuminating diaphragm, or concentric with the optical axis and of a thickness which varies along the annulus or annular array so that after a complete circuit of the annulus or array a phase difference of n 360 degrees (n= 1, 2, 3, ...) results, the thickness of the plates increasing in opposite directions and at least one of the plates being rotatable to vary the effective phase difference. As shown, the system comprises a condenser 2, stop 3, objective 4, eyepiece 6 and two phase plates 5a, 5b apertured as shown in Fig. 2, and a diaphragm 1 having apertures corresponding to those in the plates. The plate apertures 7 are of different thicknesses producing different phase differences between light passing through them and that passing the remainder of the plate. By rotating one or both of the plates the effective phase difference between the difffracted and direct beams is varied. The apertures may form an annulus, the thickness of which varies continuously around the annulus.
Patent GB-925736-A (GB)
Title: Improvements in fuel burner means
IPC: F23D17/00
Filed: 1962-02-08
Abstract: 925,736. Gas burners. BABCOCK & WILCOX CO. Feb. 8, 1962 [Feb. 9, 1961], No. 4818/62. Class 75 (1). A burner comprises an air register 18 discharging air through a sleeve 24A and a collar 26 to a combustion chamber port 11, the collar 26 being surrounded by a ring gas manifold 40 having spuds 43 projecting radially through the collar 26 into the air stream from the register 18. Air entering the register 18 from a windbox 17 is given a whirling motion by pivoted doors 22 arranged between end walls 20 and 21 of the register and actuated manually or automatically by means 23. Each spud 43 comprises a tubular portion having two diametrically opposed rows of perforations 49, 50 and two further rows 51, 52 located on the same side of the plane including rows 49, 50 and a tip having a perforated central face 46 and imperforate slanting side faces 44, 45 and perforated slanting end faces 47, 48. The spuds are screwed or welded to the manifold 40 so that the perforations 51 and 52 direct gas against the stream of combustion air from the register 18. The burner is supported by the collar 26 on the combustion chamber wall and by a cylinder 27 in a closure member 28 of an opening 29 in the windbox casing 16 through which the burner may be inserted and removed. A pivoted access door 30 closes the outer end of the cylinder 27. An oil atomizer 35 and an impeller 36 are mounted on the end of an axially movable fuel pipe 32.
Patent GB-139761-A (GB)
Title: Improvements in clutch mechanism
IPC: F16D11/04
Filed: 1920-02-17
Abstract: 139,761. Kraut, H. B. March 4, 1919, [Convention date]. Operating clutches.-In power-operated disengaging-means for claw and other clutches for use in cutting-machines &c., the clutch-part 24 turning with the driven shaft 16 is moved into engagement with the driving clutch-part 25 by arms 28 on a spindle 26 rocked by a pedal-operated link 40 pivoted to an arm 34 loose on the spindle 26 and connected to an arm 30 rigid on the spindle by a rod 32 and spring cushioning-means 38. When the pedal is released, the spring 38 returns a roller 46 carried by the arm 34 into the path of a camflange 47 on the clutch-part 24, so that the clutch is disengaged by the rotation of the shaft.
Patent GB-196580-A (GB)
Title: Improvements in devices for closing compressed or liquid gas cylinders
IPC: F17C13/06
Filed: 1923-02-20
Abstract: 196,580. Soc. Anon. d'Applications des Gaz LiquÚfiÚs. April 20, 1922, [Convention date]. Storing under pressure.-A device for closing cylinders containing compressed or liquefied gases comprises an internally-threaded socket which is screwed on the neck of the cylinder to form a tight joint, and forms a retaining means for the cap at all times and a connection between the cylinder and a vessel under pressure, with complete exclusion of the outer air, during charging or discharging of the cylinder. Fig. 3 shows a cylinder with a socket 6 screwed on the neck and forming a tight joint 7 with or without plastic packing. The cap 3 is screwed on the end and holds a plastic washer 4 tightly in place; the end 8 of the socket is of smaller diameter than the cap, and prevents it from becoming wholly unscrewed while forming a joint for charging and discharging. In modifications, the joint 7 may be replaced by a joint formed by a shoulder at the inner end of the screwed portion of the socket, or the cap may be screwed not on the cylinder but on the threaded interior of the socket. Fig. 6 shows a cylinder formed in two parts 1, 9 held together, with a joint 11 of plastic material, by the socket 6 in which the cap is screwed; in a modification, the cap is screwed on the neck portion 9. Fig. 8 shows the part 9 formed of ebonite or like plastic material held tight by the metal cap 3 screwed in the socket.
Patent GB-533496-A (GB)
Title: Welding face-guard
IPC: A61F9/06
Filed: 1939-02-15
Abstract: 533,496. Welders' eye shields. OSTROWSKI, T. Feb. 15, 1939, No. 4954. [Class 97 (i)] Relates to a shield of the kind comprising a casing 1 carried on a handle 13 and having a viewing aperture covered by glasses arranged one behind the other, one 4 transparent and fixed, and the other 5 dark and hinged or slidable so that it can be moved out of its operative position by means operated by a lever 11 actuated by the hand holding the handle. According to the invention, the operated means comprises a rod or link 10 directly connecting the lever 11 with the dark glass when this is slidable (Fig. 4, not shown) or with an arm 8 secured to the hinge pin 7 of the dark glass when this is hinged. (Fig. 2). The lever 11 shown is bell-cranked, and is actuated by a push rod 15. The hand is protected by a guard 2.
Patent GB-558285-A (GB)
Title: Improvements in and relating to the preparation of titanium dioxide
IPC: C01G23/053
Filed: 1942-04-15
Abstract: 558,285. Titanium dioxide. DU PONT DE NEMOURS & CO., E. I., and OLSON, C. M. April 15, 1952, No. 4973. [Class 1 (iii)] In the production of titanium dioxide, a seeded or nucleated titanium salt solution is heated to increase the colloidal content, heating is interrupted before there is a substantial filterable precipitate, a diluent is added and the diluted solution hydrolyzed. The heat treatment may be effected at 80 to 100‹C and interrupted just before the occurrence of a rapid change in turbidity. The solution may contain initially 180 to 225 grams of titanium dioxide per litre and be diluted with hot water to not more than 160 grams per litre.
Patent GB-218350-A (GB)
Title: Device for preventing splashing of mud or such like from motor vehicles while in motion
IPC: B62D25/18
Filed: 1923-11-13
Abstract: 218,350. Garvie, J. Nov. 13, 1923. Lateral-splash guards for the wheels of motorvehicles, comprising a shoe A carried by one end of a rod or tube B detachably connected at its other end to the footboard or body ledge of the vehicle, are characterized by a torsion spring E enclosed within a sleeve-like portion of a vertical pin A<1> upon the shoe, one end of the spring being attached to the end B<2> of the rod B and the other end to the pin. The shoe is normally retained in a straight-ahead position by the engagement of a projection F with a notch F', and the spring serves to restore the shoe to this normal position after it has been deflected as by the wheel in steering. A guard may be provided on each side of the wheel. For rear wheels the rod or tube B is straight in plan view.
Patent GB-433467-A (GB)
Title: Improvements relating to wind screen wipers for motor vehicles
IPC: B60S1/38
Filed: 1934-02-15
Abstract: 433,467. Windscreen-cleaners. LUCAS, Ltd., J., WHITEHOUSE, H. E., MASON, S. A., and EDWARDS, J. C., Great King Street, Birmingham. Feb. 15, 1934, No. 5025. [Classes 19 and 138 (i)] In windscreen-cleaners for curved windscreens of motor vehicles the wiper blade is made from flexible material, which, whilst normally straight, is capable of bending in its own plane, so that under the pressure exerted between the edge of the blade and the screen, it can vary its shape continuously as it passes over the curved surface of the screen. In the construction shown in Fig. 1, a blade a made from a single or multiple strip of rubber or like material is attached at its ends to a holder b which is connected to an oscillatory wiper arm c. In a modification the arm c is connected directly to one end of the blade, the other end being attached to the arm by a link spring-pressed towards the screen. In the construction shown in Fig. 3, the blade a is slit at its rear edge and is mounted in a channelled holder b, being threaded over a helical spring h.
Patent GB-698958-A (GB)
Title: Improved means for supporting and loading the top rollers of textile drafting apparatus
IPC: D01H5/56
Filed: 1951-03-01
Abstract: 698,958. Roller weighting arrangements. T.M.M. (RESEARCH), Ltd., HAYTHORNTHWAITE, J. J., and CALVERT, J. Feb. 19, 1952 [March 1, 1951], No. 5037/51. Class 120(ii) In a textile drafting apparatus the upper rollers are mounted in an arm pivoted to a fixed support, with which arm there is associated a mechanical reaction member which, when the arm is in the operative position, bears against a second mechanical reaction member at a point so located with respect to the pivoted axis of said arm as to bring about a turning movement about said axis, imparting a downwardly acting loading force to the said rollers by the resultant compression of springs housed in said arm and arranged to bear upon the respective upper drafting rollers. The drafting mechanism comprises upper rollers 1, 3, 9 and lower rollers 2, 4, 10, the roller 4 serving to drive an apron 5 which passes around a tensor bar 6 and a weighted tension roller 7. A slip roller 8 rests upon the apron 5 close to the nose of the tensor bar 6. The upper rollers are made in aligned pairs joined as a unit by a common arbor by which each pair of rollers is mounted in a bearing 14. The bearings 14 are slidably mounted within a channel-sectioned arm 12 pivoted upon a rail 20 which extends longitudinally of the machine. The bearings 14 are retained in place by setscrews 16. A spring clip 13 retains the arbors 11 within the bearings 14. Each bearing 14 comprises a compression spring 18 placed between a screw threaded plug 19 and a pressure pad 17. The channel sectioned arm 12 is of elbowed formation and is provided at 24 with a pivoted abutment 25 having a hardened inset contact member 26. Fixed to the rail 20 is a collar 29 also having a hardened inset contact member 31. When the rollers are in the operative position, Fig. 1, the arm 12 may be depressed against the action of the springs 18 and the member 25 swung so that the insets 26 and 31 abut against each other, thus retaining the arm in this position and providing a loading pressure for the rollers. A dust cover 34 may also be provided upon the pivot 24. Detents 32 and 33 may be provided in the reaction members 25 and 29 to hold the pivoted arm in the open position as shown in Fig. 2. In a modification, the pivoted reaction. member is provided on the roller arm pivot or another fixed member adjacent thereto whilst the fixed abutment is carried on the supporting arm.
Patent GB-608197-A (GB)
Title: Improvements in or relating to electro-magnetic pumps
IPC: H02K44/06
Filed: 1946-02-18
Abstract: 608,197. Induction motors. GENERAL ELECTRIC CO., Ltd., and DUNHAM, C. R. Feb. 18, 1946, No. 5039. [Class 35] A polyphase induction machine is adapted to act as a pump for electrically-conducting fluids, e.g. mercury, by the provision of a large magnetic gap occupied by a stationary spiral baffle for guiding the fluid round the central core member. As shown, the outer member 1 which carries windings 4 to produce a rotating field has a glass or other liquid-resisting sleeve 6 having inlet and outlet tubes 7, and the laminated central member 8 has a spiral strip of iron 11 fixed round its periphery by welding or by its own spring action. Several strips or tubes may be used and the whole conducting liquid acts as a squirrel cage, the liquid-filled spaces 9 or additional means serving as end rings. A further envelope may exclude liquid from the central member.
Patent GB-650473-A (GB)
Title: Improvements in electric selector switches
IPC: H01H25/06
Filed: 1948-02-20
Abstract: 650,473. Retractive switches. ARROW ELECTRIC SWITCHES, Ltd. Feb. 20, 1948, No. 5041. Convention date, Jan. 14, 1946. [Class 38(v)] A selector switch is arranged so as to return to its normal position after axial and rotary movement of the operating shaft 20. The shaft is retracted axially by. a coil spring encircling the shaft as in Specification 649,822, and in addition carries a member 105 on the sleeve 21. Recesses 105d formed on the member 105 co-operate with similar recesses 99 on the base 90 to form niches which accommodate springs 107. On rotation of the shaft the springs are compressed and return the shaft to its normal position when released.
Patent GB-292642-A (GB)
Title: Improved method and apparatus for effecting reactions between solid materials and air and/or gas
IPC: B01J8/10
Filed: 1927-02-22
Abstract: 292,642. Hayward, E. Feb. 22, 1927. Solids, treating with gases.-In effecting reactions between solid materials and air or other gases under heat and pressure, the substantially dry powdered or granulated solid materials are continuously fed through an externally heated chamber in which they are subjected to the action of a circulating current of air &c. under pressure, it may be in countercurrent, the solid materials are continuously or periodically charged into the chamber and the solid and substantially dry reaction products continuously or periodically discharged therefrom, the air &c. being introduced into and discharged from the chamber independently of the solid materials and the solid reaction products respectively. Pressures of the order of 20 atmospheres and temperatures up to 450‹ C. may be employed. As shown in Fig. 1, the initial material is fed from a hopper 21 through a valve 22 into an intermediate chamber from which a conveyer 23 passes it through a second valve 25 into the reaction chamber 4 which is surrounded by a casing 7 which may contain molten lead and by a casing 8 containing gas burners 11. The valves 22, 25 may be adapted for automatic co-operation in the same manner as the valves 31 described below. A worm 16 conveys the material through the chamber 4 and air &c. under pressure is circulated therethrough, preferably in countercurrent to the material, by means of pipes 20, the air &c. leaving the chamber being recirculated, if desired, with addition of fresh gas. The solid reaction product is discharged through a valve 31 into an intermediate chamber from which a second valve 31 passes it to a chamber 38, the valves 31 being automatically operated from a cam shaft 33 in such manner that they are never both open at the same time. Residual gas from the chamber 38 is passed through a silencer 41.
Patent GB-123989-A (GB)
Title: Improvements in Calculating Instruments.
Inventor: POOR CHARLES LANE
IPC: G01C21/02
Filed: 1919-02-28
Abstract: 123,989. Poor, C. L. Jan. 10, 1918, [Con vention date]. Slide-rules of the circular type for calculating the zenith-distance in the celestial spherical tri angle when the latitude, declination, and hour angle are known, from the formula:-Havs. Z = Cos L Cos D Havs. H + Havs. L Œ D where the symbols have their usual significance, and also the azimuth from the declination, hour angle and altitude, by the formula :-Sin A = Sin H Cos D. Sec h. Upon a plane circular base 10 supported upon legs 14, are a number of con centric scales, graduated according to the logarith mic values of the following functions :-Sines o: azimuth, hour angle, and altitude, 60, haversines of hour angle, 35, 36, 37, cosines of declination and latitude, 30, haversines of zenith distance as altitude, 50. In addition there is an evenly. divided scale 41 for reading logarithms against a logarithmically-divided scale 40 of natural num. bers. The scales start and terminate upon the radial line 27, and the calculations are made with the aid of adjustable radial lines 25, 26, of which the line 26 is carried by a transparent disk 11 mounted on a central pivot 15, and the line 26 by a transparent arm 17, 12 on a central pivot 19. Means 21, 22, 23 for clamping the disk and arm together in desired relative positions are provided.
Patent GB-1007653-A (GB)
Title: Improvements in and relating to printed electric switch contacts
IPC: H05K3/24
Filed: 1963-02-08
Abstract: 1,007,653. Printed circuits. PHILIPS ELECTRONIC AND ASSOCIATED INDUSTRIES Ltd. Feb. 8, 1963 [Feb. 13, 1962], No. 5244/63. Heading H1R. [Also in Division H2] A printed electric switch contact, comprising a layer of bright nickel on an insulating surface, is coated with a layer of matt nickel to prevent corrosion and reduce contact resistance. The layers of bright and matt nickel may be applied either by successive electro-deposition processes or by applying them in reverse order to a copper layer on a steel sheet and compressing and heating this sheet against paper impregnated with resin to transfer the copper and nickel layers thereto, the copper then being removed by etching.