baber/WOPTO huggingface dataset:
Patent GB-611749-A (GB)
Title: Improvements in or relating to electronic commutators or the like
IPC: H03K23/82
Filed: 1946-04-02
Abstract: 611,749. Thermionic distributers. INTERNATIONAL BUSINESS MACHINES CORPORATION. April 2, 1946, No. 10169. Convention date, April 10, 1945. [Class 40 (iii)] [Also in Group XL (c)] A hard valve commutator comprises a chain of trigger stages S1 ... 3, each consisting of a pair of valves 68a, b, cross-connected to have two stable states, one valve 68b in each stage being connected also to the previous stage in such a manner that sequential reversal occurs with successive impulses applied simultaneously to all the stages. The valves 68a, b are coupled by a common cathode resistance 69 and also by cross-connection to two potentiometers comprising resistances 62a, 63a, 64a and 62b, &c., respectively. A stage in the OFF condition has the valve 68a conductive, rendering the potential of the corresponding point 67b low and the valve 68b non-conductive. Switching impulses are obtained by differentiation in the network 5, 6 of a square waveform generated by the multivibrator 1. Positive-going components in the differentiated train are suppressed by a valve 3 with grid-current bias, while the negative-going components cause positive-going pulses to appear in the anode circuit and on the line 54. An impulse on the line 54 will switch to ON any stage in which the suppressor-grid potential of the valve 68b is high. The valve 68b then becomes conductive, reducing the potential of the corresponding point 67a and rendering the valve 68a non- conductive. The potential of the point 67b rises and maintains the valve 68b conductive, and also applies a high potential to the corresponding line 10 which conditions the valve 68b in the subsequent stage for switching to ON. Successive impulses thus switch the stages S1 . . . 3 sequentially to ON. A phasereversing valve 78 is interposed in the line 11 whereby the stage S1 is conditioned for switching to OFF by a reduction in the potential of the line 11 when the stage S3 is switched to ON. Further impulses then switch the stages S1 ... 3 successively OFF, each conditioning the next by a reduction in the potential of the corresponding line 10. With the switching OFF of the stage S3 the cycle is complete and the stage S1 conditioned for a further cycle by reason of an increase in the potential of the line 11. The reversal of each stage is assisted by condensers 65a, b which cause the changes of potential of the points 66a, b respectively to produce corresponding impulsive changes at the points 67a, b respectively. A further condenser 71 connected across each line 9 ensures that the subsequent stage is not conditioned for switching before the termination of the pulse which switches the prior stage. Specification 593,577 is referred to.
Patent GB-339580-A (GB)
Title: Improvements in and relating to electrical connector
IPC: H01T13/04
Filed: 1930-03-31
Abstract: 339,580. James, R. W., (Connecticut Telephone & Electric Corporation). March 31, 1930. Two-part couplings.-A connector for use with bulbous terminals comprises a U-shaped clip 5, to which the lead is connected, having holes 6 to engage the terminal bulb 7 and, pivoted to it at 9, a U-shaped latch 10 which, when moved to the position shown, prevents the clip jaws from separating and the connecter being removed. The latch has holes 11 with inwardly-turned edges 12 which engage in the holes 6 and keep the latch in the engaged position. To ensure good contact the holes 6, 11 have sharp corners which cut through any scale or dirt on the terminal. In a modified form the holes 6, 11 are replaced by spherical depressions.
Patent GB-481056-A (GB)
Title: A process for the manufacture of artificial threads, sheets, films and like shaped products
IPC: D01F2/30
Filed: 1937-04-09
Abstract: Shaped products such as threads, sheets, films, and the like are obtained from the reaction mixture obtained by the action of formic acid on cellulosic material in presence of 70-250 parts of catalyst per 100 parts of cellulosic material, by pouring, extruding, or spreading the reaction mixture on to a base, evaporating the formic acid, detaching the shaped products from the base, and then treating them so as to remove the catalyst residues.  The catalyst may be zinc chloride, a mixture of zinc chloride and chlorine, or sulphuric acid. The reaction mixture may be diluted with formic acid.  Threads or bands may be obtained by extruding the solution through perforated or slot-shaped nozzles on to a drum or endless belt.  Removal of formic acid may p  be effected by passing a current of hot air over the shaped mass, or by operating under a vacuum.  After evaporation of all or most of the formic acid, the films or threads are removed from the base and washed with water or other liquid to remove catalyst and acid residues.  In examples, cotton linters or other cellulosic materials are kneaded with zinc chloride and formic acid containing, if desired, a proportion of dissolved chlorine, or with sulphuric acid and formic acid.  The solution is poured onto a base, the formic acid is evaporated, and the sheet is removed, and washed with water or dilute formic acid.  The sheet obtained is of high tensile strength and folding value.
Patent GB-558918-A (GB)
Title: Improvements in apparatus for the dry cleaning of coal
IPC: B07B13/00
Filed: 1942-07-22
Abstract: 558,918. Separating solid materials. BERRISFORD Ltd., W. H. and BERRISFORD, W. H. July 22, 1942, No. 10266. [Class 117] [Also in Group XXX] In apparatus for cleaning coal of the type in which the coal is dropped on to a sloping plate 2 of glass &c. as described in Specifications 265,341, 271,633, and 325,284, [all in Class 117], and in which the coal is fed from a jigging conveyer 8 on to a step plate 18 moving therewith from which it is wiped by a stationary plate 26, the step plate 18 is coupled to the jigger so as to have a wider range of movement. It is carried on arms 17 pivoted at 14 and is driven from the jigger by a link 19 which is adjustably connected at varying positions along a slot 22. The plate may be curved so that it is concentric with the pivot 14 and the length of the link 19 may be adjustable as described in Specification 558,919, and the stationary plate 26 may be pivoted and provided with a wiping pad of semi-circular cross-section as described in Specification 558,920. The plate 2 is pivotally mounted - at 3 and its inclination adjusted by a cam 4. A jet of air from a nozzle 7 keeps the plate free from dust.
Patent GB-689469-A (GB)
Title: Improvements in and relating to electric arc welding apparatus and welding systems
IPC: B23K11/26
Filed: 1950-04-26
Abstract: 689,469. Control systems for welding arcs. GENERAL ELECTRIC CO., Ltd., and PICKERING, I. J. April 26, 1951 [April 26, 1950; Oct. 12, 1950], Nos. 10302/50 and 24957/50. Drawings to Specification. Class 38 (iv). In an arc welding system in which two closely adjacent electrodes and the work are connected to a two-phase source, which may be obtained from a three-phase supply through Scott-connected transformers, single-phase arcing between the electrodes (when the main arcs between these and the work extinguish) is prevented by means responsive to breaking of the main arcs and which reduce the interelectrode voltage to a value inadequate to sustain an arc between the electrodes. In one arrangement a current transformer in the work lead controls a relay arranged to interrupt one phase of the supply to the Scott transformer when current in the work lead falls to zero on breaking the main arcs. The supply is reconnected when the electrodes are brought into contact with the work by a relay responsive to the low voltage then obtaining between the electrodes and work. In a similar arrangement the supply transformers have tapped secondary windings and the relay controlled by the transformer connects the welding circuit to lower voltage tappings in the absence of current in the work lead. In other arrangements, switching means for interrupting the supply to one electrode may be responsive to the change of flux, consequent to single phase arcing, in a magnetic core having two windings, which serve also as tapped regulating chokes, connected one in each phase line. Another arrangement utilizes a switching means responsive to the voltage change which occurs between one electrode and the work when single phase arcing occurs. Lack of current balance in the primary circuits of the supply transformers which occurs with single-phase arcing may be utilized to operate a switch for interrupting one phase line.
Patent GB-656652-A (GB)
Title: Improvements in cycle tail lamps
IPC: B62J6/04
Filed: 1948-04-15
Abstract: 656,652. Lamp-holders. WUYTS, J. L. G. April 15, 1948, Nos. 10500 and 10501. Convention dates, April 15, 1947, and March 22, 1948. [Class 38 (i)] [Also in Group XI] In a cycle tail lamp having a housing 1 of rubber or like resilient material with a lens 14 secured therein near its mouth and a single pole lamp-holder provided in its side wall, the lamp holder is connected electrically to the cycle frame by means of a conducting strip 12 having one end connecting with the holder and its other end secured to a bolt 4 fastening the lamp to the cycle. Fig. 1 shows the rubber housing 1 formed with a hole 8 in its side wall to receive a metal lampholder 9, the conducting strip 12, which may be resilient, being led into the opening 8 via a passage 13 in the top wall of the housing and turned down beside the metal lamp-holder 9. Fig. 3 shows an alternative form of lamp-holder which comprises a body part 16 of soft rubber having an inwardlywidening lamp-receiving bore 17, and a metal cap 18 secured to the body part by teeth 19 bent inwards into the rubber. The cap 18 has a front opening which coincides with the bore 17 and has a lip 20 bent to provide a screw-thread engagement with a lamp bulb 10. A slot 21 connecting with the bore 17 is provided in a wall of the body part 16 to receive and resiliently grip a contact strip 22, Fig. 5, having a cable connecting tag 23. Fig. 6 shows a cycle tail lamp wherein the housing 1 has an upper slanting wall 31 provided with a screw-threaded lamp receiving socket 25, the bottom 30 of which is of square section to house the head 29 of a terminal bolt 28 extending through a passage 32 to the outside of the housing 1. The lamp socket end of the conducting strip 12 is housed in a groove 27 of about the depth of the screw-thread in the socket 25. To prevent loosening of the lamp bulb 10 by vibration, the screw-threads of the socket 25 are interrupted by longitudinal grooves which are bevelled on one side to facilitate the screwing-in of the bulb.
Patent GB-105890-A (GB)
IPC: F16N7/22
Abstract: 105,890. Casey, W. Feb. 20, 1917. Lubricant conveyed by mechanical means. -A lubricating-ring for shafts or spindles is knurled or milled on its inner surface to prevent slipping and to increase the adhesion of oil. The ring is in two parts hinged at c and formed with a snap fastening d.
Patent GB-636892-A (GB)
Title: Improvements in or relating to processes of improving the stability of an unstable solution of a reaction product of melamine, an aldehyde and a bisulphite
IPC: C08G12/40
Filed: 1947-04-22
Abstract: An aqueous solution of a reaction product of melamine, an aldehyde and a bisulphite is stabilized by adding to it a small proportion of a water-soluble hydroxide with readily dissociated hydroxyl ions. Suitable hydroxides are those of the alkali and alkaline earth metals and quaternary ammonium bases, e.g. phenyl triethyl ammonium hydroxide.  Aldehydes mentioned are formaldehyde, acetaldehyde, propionaldehyde, butyraldehyde and heptaldehyde.  Bisulphites mentioned are sodium and potassium bisulphite.  2.5 to 6 mols. of aldehyde and 0.2 to 1 mol. of bisulphite per mol. of melamine may be used.  The products are useful for increasing the wet tensile strength of paper by adding them to the pulp in the beater.  Examples are given illustrating the stabilizing effect of additions of caustic soda to condensation products prepared with differing amounts of sodium bisulphite.
Patent GB-687363-A (GB)
Title: Improvements in electrodynamic pick-up's
IPC: H04R9/12
Filed: 1950-05-01
Abstract: 687,363. Gramophone pick-ups. HANSEN, H. C. May 1,1950 [May 4,1949; May 5, 1949], No. 10707/50. Class 40 (iv). In a moving-coil pick-up the polepieces are embedded in a non-magnetic body, preferably of thermoplastic material, to present between them an elongated air gap in which the armature is arranged, the armature bearings serving to close the ends of the air gap and render it substantially dust-proof. As shown in Fig. 1, the pole-pieces 10, 12, which have wedge-shaped ends to produce a strong field in the air-gap 14, are sealed or moulded in the body 18, which is preferably of thermoplastic material, so as to leave a cylindrical gap between them. The gap has enlarged end portions to receive resilient bearings 34, 36 (Fig. 4) of rubber or the like which support the armature. The body 18 has plate-like extensions 38, 40 (Fig. 1) and a vertical rib-like member provided with a hole 44 to allow fixing of the body to a casing as by a screw. Front portions 48, 50 (Fig. 1) of the polepieces are left exposed as also are the corresponding rear portions. Moulding of body. The polepieces are inserted in a form in engagement with a core member corresponding to the cylindrical air gap and abutting against portions of the form to produce the exposed polepiece surfaces. The form is filled with thermoplastic material and after this has hardened the form is dismantled and the core member removed. Armature (Fig. 4). This comprises a rod-like member 56 having head portions 58, 60 of increased diameter with transverse slots 66, 68 therein. The coil 70 is wound in the slots to lie wholly with a cylindrical surface surrounding the head portions. The stylus arm 72 is fitted to the armature by inserting the bifurcated extension 62 through the holes 76 and deforming its ends. The ring members 34, 36 fit over the head portions 58, 60 and serve to mount the armature accurately in the air gap. Leads from coil. These extend axially from the top of the armature and are soldered to tags 94, 98 (Fig. 1) on the body. Magnetic system. After assembly three rodlike magnets which together form three sides of a rectangle are pushed in from the rear to abut against the rear exposed surfaces of the polepieces, and are then magnetized by bringing the poles of an energizing magnet into contact with the front exposed surfaces of the polepieces.
Patent GB-707034-A (GB)
Title: Process for manufacturing blocks or similar articles of solid paraffin wax
IPC: C10G73/40
Filed: 1952-04-29
Abstract: Particles, e.g. grains or flakes, of wax are moulded to form blocks. The mould may be marked to form symbols on the wax.  The particles may be formed by spraying liquid paraffin wax into the air or by chilling it on cooled rollers.  Specification 674,194 is referred to.
Patent GB-714112-A (GB)
Title: Improvements relating to apparatus for feeding file material to file cutting machines
IPC: B23Q7/06
Filed: 1952-04-29
Abstract: 714,112. Feeding devices ESTLANDER, E. April 29, 1952 [May 30, 1951], No. 10770/52. Class 117 [Also in Group XXII] Apparatus. for feeding file blanks 1, 2, 3, 8 to the file-cutting bed i in a file-cutting machine comprises a container a for the blanks, a distributing plate b, and a carrier c reciprocated by power means (not shown) and arranged to impart some of its motion to the plate b so that the blanks are fed automatically from the container to the cutting bed i and, after the cutting operation, along a slideway e to a receiving box f. A pin h on the plate b engages the end of a slot g in the carrier c to move the carrier when the plate b is being withdrawn after the cutting operation on the blank 1. During this movement, the blank 2 is pushed off the platform on the end of the plate b on to the end of the carrier c by the blank 3 which prevents it from moving with the plate, and the blank 1 is discharged into the box f. As the carrier returns, the blank 2 is held stationary by a stop d until it engages the opening in the carrier which then feeds it beneath the stop. During this movement the blank 3. which at the end of the previous withdrawal stroke was deposited on the platform of the plate b, is moved from the bottom of the stock of blanks in the container a into the position occupied by blank 2 in Fig. 1.
Patent GB-113912-A (GB)
Title: Telephone Transmitter.
Inventor: BIRRELL WILLIAM
IPC: H04R21/02
Filed: 1917-07-27
Abstract: 113,912. Birrell, W., Birrell, J., and Cavenaugh, R. A. July 27, 1917. Microphones.-Both electrodes of a microphone are mounted opposite each other on the diaphragm in such a manner that no relative movement occurs between them; while the space between the electrodes is partly filled with carbon granules. The diaphragm is mounted in a rubber ring which is loosely housed. In the arrangement shown the diaphragm 7 is dished at the centre to form a granule chamber 10 which is closed by a mica disk 22. One electrode 13 is mounted on the diaphragm 7 and the other upon the disk 22; while the chamber 10 is partly filled with granules 31. The diaphragm 7 is mounted in a rubber ring 8 and its movement is limited by felt blocks 30 secured to the back plate 3.
Patent GB-112739-A (GB)
Title: Improvements in Anchors.
Inventor: PERKINS BENJAMIN
IPC: B63B21/44
Filed: 1917-07-28
Abstract: 112,739. Perkins, B. July 28, 1917. Anchors.-A stockless anchor of the type having the shank b pivoted on a separate pin d held by transverse plates e in a recess in the head a has the ends a<2> of the pin inclined to engage corresponding inclined surfaces in the recess. The nuts and bolts holding the plates e in position are protected by being partially sunk in recesses in the head and plates. A single plate may be used instead of the two shown.
Patent GB-527376-A (GB)
Title: Improvements in surgical and medical plasters, tapes, bandages and the like
IPC: A61L15/44
Filed: 1939-04-11
Abstract: 527,376. Plasters &c. ointments. ROTUNDA, Ltd. (Bondy, H. F.) April 11, 1939, No. 10886. [Class 81 (i)] Surgical plasters, tapes, bandages &c. are impregnated with substances containing vitamins A and D. Fish liver oils are suitable sources of the vitamins. Examples describe compositions comprising, in addition to concentrated cod liver oil, zinc oxide, resin, rubber and a softening agent.
Patent GB-429804-A (GB)
Title: Improvements in water tube steam boilers and like tubulous evaporators
IPC: F22B29/02
Filed: 1934-04-11
Abstract: 429,804. Instantaneous steam generators. DMITREVSKIJ, P., 698, StresovickÔ ul, and ASTROV, D., 584, Wuchterlova ul, both in Prague. April 11, 1934, No. 10915. Convention date, April 11, 1933. [Class 123 (ii)] Water is forced through a helical passage formed by a screw-shaped fin 22 on a core 2 in an externally heated tube 1. The speed of the water flow is sufficient to maintain a continuous layer of water on the inner surface of the tube. The core is fixed at one end, and its other end so engages a seating ring 10 on the tube, that upon the lengthening of the tube due to increased heating, the seating is moved away from the core end and more water is admitted to the helical passage. An extension 23 of the core forces liquid from a space 24 to control the heating means. Reference has been directed by the Comptroller to Specifications 265,591, [Class 123 (ii)], and 403,415.
Patent GB-1392804-A (GB)
Title: Haemodialysis machine
IPC: A61M1/36
Filed: 1971-04-23
Abstract: 1392804 Detecting bubbles JOSEPH LUCAS (INDUSTRIES) Ltd 18 April 1972 [23 April 1971] 10921/71 Heading G1A In an apparatus for detecting bubbles in a liquid comprising a light source and a photo-cell arranged to receive light that has passed through the liquid the photo-cell's output is connected to a two state switching circuit which changes states when the incident light intensity on the photo-cell rises to above a predetermined level. In a haemo-dialysis machine, blood before and after passing through a dialyzer (13), Fig. 1 (not shown), is inspected for bubbles by two sets 20a, 21a and 20b, 21b of a lamp and a photo-transistor, and each set may be in a housing clipped on to the tube as disclosed in Specification 1373813. The lamps 20a, 20b and photo-transistors 21a, 21b, are connected into a switching circuit Fig.2 containing two four input "AND" gates 59, 60 which are connected as shown so that AND gate 60 only gives an output when both the lamps are passing current, when no bubble above a predetermined size is in either of the beam paths, and when the switch 35 is closed. The effect of bubbles below a predetermined size is mitigated by delay circuits 26, 27, 28 and 38, 39, 40. The output of AND gate 60 is fed to the base of a transistor 51 and causes the transistor to conduct keeping contacts 54 open by means of a relay 52 and a movable contact 55 connected to a fixed contact 55a as shown. When there is no output from the AND gate 60 contacts 54 close to de-energize the haemodialysis machine and activate an alarm bell or a warning light; furthermore contact 55 will move over to a contact 55b thereby discharging a condenser 58 through a solenoid 57 which activates a retaining pin to permit a spring-loaded plunger to pinch the tube through which the blood flows.
Patent GB-232989-A (GB)
Title: An improved gun for firing at ranges which may be varied between very wide limits
IPC: F41A21/12
Filed: 1925-04-27
Abstract: 232,989. Schneider et Cie. April 28, 1924, [Convention date]. Ordnance design; chambers; riflings. -The bore of a gun barrel has two or more conical shoulders a, a<1> which act as stops for the driving band to vary the position of the projectile when firing with different charges for different ranges. For short ranges, a band C', Fig. 1, of a size to be stopped by the rear shoulder a<1>, is employed. For long ranges, a smaller driving band is employed which is stopped at the front shoulder a. The bore between the shoulders is smooth and either cylindrical or slightly conical. The commencing portion E of the rifling is either straight or only slightly inclined, to reduce the checking action on the dtiving band. In a modification, Fig. 3, the projectile has two driving bands C', C<2>, the front one being the smaller, and the barrel has three or more conical shoulders a - - a<2>.