baber/WOPTO huggingface dataset:
Patent GB-883988-A (GB)
Title: Improvements in objective lenses
IPC: G02B13/04
Filed: 1959-04-15
Abstract: 883,988. Optical objectives. FARRAND OPTICAL CO. Inc. April 15, 1959 [April 17, 1958], No. 12827/59. Class 97(1). An optical objective comprises a four component combination to the front of the stop and, to the rear of the stop, a combination of positive power consisting of a compound negative meniscus concave to the stop and a positive component of unequal surface curvatures. The front combination comprises a first negative component spaced from the stop by between 0.8F and 1.8F with its rear surface concave towards the stop and with the vertex of this rear surface spaced by between 0.33F. and 0.67F. from the second component. This second component is a doublet of positive power and is followed by a meniscus positive third component concave towards the stop and by a negative doublet which is meniscus and concave towards the stop. The third component is so enclosed by the second and fourth components that the air spaces therebetween have the form of negative lenses with their more strongly curved surfaces concave towards the stop so that each air space acts as a collecting lens. Preferably, the negative front component is of meniscus form concave towards the stop and the power distribution within the objective is such that the power sums #I to #VI of the six components are related to the objective power # as follows. Optical data are given for one example of the objective shown and for two other examples. Specification 797,634 is referred to.
Patent GB-194973-A (GB)
Title: Improvements in foot-arch supports for insertion in boots and shoes
IPC: A43B13/20
Filed: 1922-05-06
Abstract: 194,973. Klotz, A. May 6, 1922. Foot-arch supports.-Relates to arch supports fitted with pneumatic pads and consists of a metal plate M to which is detachably, or otherwise, secured a flexible layer of fabric R on which is cemented a hollow pad B which is wedge-shaped in sections and has a stiffening piece O along the inner angle. The edge cf the, plate is curved upwardly along the pad and the fabric layer is extended at R, to protect the pad against chafing. On the lower side of the plate is a valve V, consisting of a casing I held in place by a flat nut H, and containing a plug A which is screwed down against a washer G to close the valve. The plug is formed with a conical recess a with which a nozzle on a pump P, Fig. 8, is adapted to engage to open or close the valve. The engagement may be frictional only, or projections A<1> on the pump nozzle may coact with similar recesses in the face cf the plug.
Patent GB-786257-A (GB)
Title: Improvements in and relating to means for the control of electric motors driving winders for textiles
IPC: B65H23/198
Filed: 1956-04-27
Abstract: 786,257. Control of two D.C. motors. COMPTOIR DE L'INDUSTRIE COTONNIERE ETABLISSEMENTS BOUSSAC. April 27, 1956 [Feb. 7, 1956], No. 12945/56. Class 38 (3). [Also in Group XXXV] A series motor 1 for winding threads in a textile machine is energized from a generator 7 having a series field windings 9, 10, and a separately excited field winding 8, the arrangement being such that winding 10 opposes the windings 8 and 9, and has a greater number of turns than the winding 9. A motor 12 for supplying threads to the winder is energized from a generator 13, the field winding of which is regulated by means of an adjustable resistor 15. The field winding 8 is energized in accordance with the voltage applied to the armature of the motor 12, and, for normal operation, the voltage of the generator 7 is essentially determined by the degree of excitation of the winding 8. During this period, the field winding 9 is short-circuited and the winding 10 is shunted by resistors 20, 21. Since the winding 10 opposes the winding 8, the voltage of the generator 7 is automatically reduced as the torque of the motor 1 increases due to the increase of the diameter of the material upon the winder, and this ensures constant tension of the threads for a given linear speed thereof. The speed of the motor 12 is modified by alteration of the resistor 15, the slider of which is coupled with that of the resistor 21 whereby constant tension of the threads is maintained. For low-speed operation, the resistor 20 only is shunted across the field winding 10, a resistor 11 in series with the winding 8 being adjusted to produce the required flux when the voltage corresponding to the low speed is applied to the motor 12. To maintain a constant voltage when at rest, the winding 8 is disconnected and the field winding 9 is shunted by adjustable resistor 17. The winding 10 is shunted by resistor 20 and produces a flux less than that from the winding 9. To reverse the winder, the winding 9 is connected in circuit without any shunt and is weakly opposed by winding 10 shunted by resistor 20. At the same time, the connections to the field winding 2 of the motor 1 are changed over.
Patent GB-1306573-A (GB)
Title: Isomerisation of lact'es to give alkyl butyrolactones
IPC: C07D315/00
Filed: 1971-05-04
Abstract: 1306573 Preparation of alkylbutyrolactones RHONE POULENC SA 4 May 1971 [6 May 1970] 12973/71 Heading C2C 5-Alkyl-γ-butyrolactones of formula wherein n is 4-7, are obtained by bringing the vapour of a lactone reactant of formula into contact with a solid catalyst which is either a Bronsted acid or a Lewis acid. The reaction may be carried out continuously and the catalyst may be, for example an acidic metal halide, a metal or metalloid oxide, an inorganic salt of a strong acid, or a strong mineral acid absorbed on a neutral or acidic solid carrier.
Patent GB-1031997-A (GB)
Title: Calibration arrangement for flow meters
IPC: G01F25/00
Filed: 1965-03-26
Abstract: 1,031,997. Selective signalling. ROCHAR ELECTRONIQUE. March 26, 1965 [April 2, 1964], No. 13043/65. Heading G4H. In a method of calibrating a flow-meter of the kind that supplies electric pulses whose number is proportional to the volume of fluid flowing through the meter, the time taken for a known volume of the fluid to pass through the meter is measured, and the time taken for the meter to produce that number of pulses which nominally corresponds to the known volume is measured, these two periods being arranged to be substantially coterminous, whereby from the quotient of these two times the actual meter constant can be determined. Apparatus to perform the method includes a vessel, into which liquid from the meter is pumped, with two photo-electric level detectors set a known volume apart. The apparatus also includes a pulse dividing circuit which can be preset to the required number, and two electronic timers.
Patent GB-600943-A (GB)
Title: Biasing circuit for cathode ray oscilloscopes and amplifiers
IPC: G01R13/32
Filed: 1945-05-24
Abstract: 600,943. Pulse amplifying circuits. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. May 24, 1945, No. 13063. Convention date, May 25, 1944. [Class 40 (vi)] In an amplifier for trains of unidirectional pulses which is provided with self-bias and also with grid condensers and resistances, shift of bias is prevented by means of diodes shunting the grid resistances. The arrangement is applied to a push-pull sweep amplifier 10, 20 for a cathode-ray tube 62. Positive-going sweep impulses are applied over a condenser 42 to the grid of the valve 10, the valves being coupled by a common resistive cathode network 36 and the grid of the valve 20 grounded over a condenser 52. The grid resistances 46, 50 are taken to points in the network 36 such that the standing current is high in the valve 20 and low in the valve 10. Change in the mean bias upon recurrent sweeps is prevented by the diodes 110, 120 shunting the resistances 46, 50 respectively. The coupling network of the tube 62 includes frequency-correcting networks and the blocking condensers 70, 76. Trace-centring potentials are derived from potentiometers 94, 96, shift due to recurrent sweeping being prevented by means of diodes 124, 126 shunting the resistances 98, 100,
Patent GB-466062-A (GB)
Title: Improvement in method of manufacturing corrugated paper board
IPC: B31F1/28
Filed: 1936-05-08
Abstract: 466,062. Adhesives; starch. STEINHALL MANUFACTURING CO. May 8, 1936, No. 13068. Convention date, July 26, 1935. [Class 121] [Also in Group VIII] Liners are attached to corrugated paper board by means of an adhesive comprising ungelatinized starch suspended in a viscous hydrosol medium adhesion being effected by gelatinization in situ of the ungelatinized starch. The carrier medium may be a solution of gelatinized starch, produced, for example, by the action of alkalies on starch. The gelatinized starch may be modified by partial dextrinization, or by the action of oxidizing agents, oxidation being checked at the desired point by addition of formaldehyde or bisulphites. The adhesive may also contain alkalis, borax, sodium aluminate, metal chlorides, urea formaldehyde, wetting agents and fillers. In the apparatus shown, paper 12 from the roll 10 is softened by steam from jets 11, corrugated by rolls 14, 15 and supplied with adhesive by roll 17. A liner 26 is applied to the coated side, the heat of the roll 16 drying the moist paper and activating the adhesive. The roll 28 applies adhesive to the other side of the paper, a second liner 32 is applied and the whole passed between a hot plate 38 and brushes 39. Rolls 40 pull the three paper strips through the machine.
Patent GB-561538-A (GB)
Title: Improvements in locks and fastening devices
IPC: E05C3/24
Filed: 1942-08-21
Abstract: 561,538. Door &c. fastenings. YOUNG, L. W. Aug. 21, 1942, No. 13295/41. [Class 44] In a fastening for doors &c. of the kind in which a bolt-like projection 6 fixed to the door enters laterally into a slot 11 in a pivoted member 8 and rocks it to fastening position in which it is secured by a catch, the catch engages the side of the slot 11 at such an angle, as to urge the pivoted member towards locking position. As shown, the fastening comprises a slotted disc 8 eccentrically pivoted at 9 in a recess in a casing 4, the walls of the recess limiting the movement of member 8 in both directions. A spring 10 biases member 8 anticlockwise towards the position in which the mouth of slot 11 registers with a slot 5 in the casing and entry of the bolt 6 rocks member 8 to the fastening position shown in which a sliding catch 12, shot by spring 14 and releasable by pivoted handle lever 15, 17, engages in slot 11. The angle of contact between the edge 12A of the catch, and the edge of slot 11, is preferably approximately 10‹. Springs 10, 14 may be replaced by a single spring.
Patent GB-538427-A (GB)
Title: Improvements in or relating to paper cartons and like containers
IPC: B65D3/24
Filed: 1940-08-21
Abstract: 538,427. Cartons. COPIGRAPH, Ltd., and BOSWELL, H. Aug. 21, 1940, No. 13298. [Class 66] A cylindrical or frustroconical carton for adhesive paste &c. is provided with a lining 13 of which a portion is offset inwardly at 18, 19, to afford a compartment for a brush &c. between the lining and the wall of the carton. The 'bottom end supporting a bottom 22 and a reinforcing disc or false bottom 21 on which the lining rests, and the upper end being threaded to receive a screwed closure cap 24 also provided with a reinforcing disc 29. The lining and.the reinforcing discs are waxed in position.
Patent GB-700853-A (GB)
Title: Improvements in valves
Inventor: SHAND STANLEY GRAPES
IPC: F16K3/02
Filed: 1950-05-26
Abstract: 700,853. Valves. SAUNDERS VALVE CO., Ltd. May 15, 1951 [May 26, 1950], No. 13314/50. Class 135 A gate valve having a thin gate 5 with a bevelled edge has at least one rubber sealing ring 33 or 34 sealed to the valve body at 30 and sealing under pressure of springs 43 with a counter surface on the valve body or another similar sealing ring when the valve is open, partly with the counter surface and the gate when the valve is partly open and with the gate when the valve is closed, in order to seal off the operating mechanism 7, 8, 11 from the controlled fluid. The shaft 11 may be electric-motor or hand operated to turn the disc 8 cranked at 7 to the gate. The sealing is increased by fluid pressure acting behind diaphragms 27, 28 carrying the sealing rings and clamped in recesses in the body parts 1, 2 by spigots on the pipe line fittings 25, 26. If fluid leaks into the recess 4 or spaces 31, 32 and develops pressure due to heating, the pressure is relieved by fluid passing between the rings and the gate, or the ring and diaphragm may be separate but abutting members so that they can move apart against spring pressure and act as a thermal relief valve. In a modification a single diaphragm only on the upstream side of the gate, is coned and carries a hollow sealing ring reinforced by a metal ring.
Patent GB-1155769-A (GB)
Title: Pressure Regulating Valve
Inventor: LAWRENCE RONALD THOMAS
IPC: G05D16/16
Filed: 1967-03-22
Abstract: 1,155,769. Valves. MARTONAIR Ltd. 8 March, 1968 [22 March, 1967], No. 13334/67. Heading F2V. A pressure regulating valve has a spring- loaded valve member 5 controlling the flow of fluid through a seat 4 from an inlet 2 to an outlet 3. A screw-threaded cap 16 can be rotatably operated to engage a spring load 12, which is pre-set by a threaded collar 14 within a housing 11, with a piston 9 that in turn engages the valve stem 8 to give an immediate pre-set initial opening load to the valve member. Further rotation of the cap 16 increases the load to give an increased outlet pressure. A vent 23 communicates outlet pressure to piston 9 which has an aperture 21 therein that moves away from a seal 20 to vent the outlet to atmosphere through chamber 22 when the cap 16 is rotated to remove the load from the valve member and piston 9.
Patent GB-688535-A (GB)
Title: Improvements in or relating to apparatus for subdividing edible material
IPC: A21C11/10
Filed: 1949-05-19
Abstract: 688,535. Slicing foodstuffs. VICKARS, Ltd., T. & T., and DERBYSHIRE, A. May 19, 1950 [May 19, 1949], No. 13339/49. Class 5(i) [Also in Group V] A method of dividing a stack of sheets or a block of friable material longitudinally and laterally comprises displacing the stack or block against a first set of stationary vertical cutters and subsequently displacing a second set of vertical cutters across the block without alteration of the direction of movement of the block. In one embodiment, Fig. 1, the sheets to be cut are stacked on a base 2, under retaining fingers 3, facing a transverse row of cutting wires 7, and are pushed forward by a thrust on the handle 5 of a ram 4 and so divided by the cutting wires into strips. The material thus divided then lies in front of a row of cutting wires 8 mounted on the ends of the arms 9, 10 of a U- shaped frame 11 with a handle 12. By a thrust on the handle 12 the cutting wires 8 are forced transversely through the stationary strips and so cut them into short lengths. The ram 4 is then retracted and another stack placed in front of it, and when the ram is again moved forward the new material pushes the old on to a travelling web 15. Preferably elastic fingers 13 bear with their bridged parts 14 on the upper surface of the stack during the cutting operation. Fig. 6, shows in plan another embodiment similar to the first, a ram 17 corresponding to 4 and a handle 18 corresponding to 5 but the transverse cutters are power driven. The drive from a power shaft 23 is applied through a dog clutch 22 which is brought into engagement at the right instant by a projection 16 from the ram moving the end of a lever 20. A shaft 33 then rotates a crank disc 25 which causes a frame carrying cutting wires, as in the first embodiment, to move across. At the end of this frame's travel a lug 32 on a disc on the shaft 33 engages a stop 43 on a pivoted arm 34 to disengage the dog clutch. In a third embodiment, Fig. 8, the material moves continuously on a conveyer 52, having blocks 51 against which the material bears, and is cut into strips by fixed cutters 60 and is then passed under a series of cutters 44. The cutters 44 are mounted on a pair of chains 45 which are driven continuously. The speed of the chains and their angle of inclination to the conveyer are such that the cutters cut the strips at right angles. Cleaning brushes may be arranged against which the cutters 44 are brought on the rturn flight of the chains.
Patent GB-475328-A (GB)
Title: Motor-vehicle change-speed transmissions
IPC: B62M25/00
Filed: 1937-05-11
Abstract: 475,328. Epicyclic change-speed gear- - ing. ALVIS, Ltd., and CLARKE, G. T. SMITH-. May 11, 1937, No. 13348. [Class 80 (ii)] Relates to change-speed gearing for motorvehicles comprising a one-way clutch connection 8 between driving and driven shafts 1, 3 and an alternative connection through a planetary overdriving train 6, 7, 4. The planets 7 are carried by the shaft 1, preferably the tail shaft of a gear-box, the annulus 4 by the shaft 3, and the sun 6 is adapted to be positively clutched alternatively to a fixed member 16, for the geared drive, and to the driven gear 4, for solid drive without freewheeling, by a synchromesh device 14 which has an intermediate free position. The synchromesh device shown comprises a spring ball 20 in a splined wheel 9 which engages a recess 21 in a control toothed muff 14 so as to cause a braking action between cones 11a, 12a to slow down the muff 14 so that its teeth engage fixed teeth 16 without shock. The same ball 20 and recess 21 cause the muff teeth to engage clutching teeth 16<1> without shock.
Patent GB-489199-A (GB)
Title: Improvements in image dissectors for use in television transmitting systems
IPC: H01J31/42
Filed: 1937-05-11
Abstract: 489,199. Cathode-ray tubes. FARNSWORTH, P. T. May 11, 1937, No. 13359. [Class 39 (i)] In an image dissector for use in television transmission a thermionic cathode 24 is mounted behind an anode 21 with a canal 22 for a beam; they are carried by leads within a shielding finger 16 which is given a high potential, a cap 30 at cathode potential protecting the cathode from this high potential. An outlet 20 in the finger is covered with a gauze 31. The dissector is mounted in an envelope with a photo-electric mosaic electrode 14 which may or may not have a backing plate 10; a magnetic focusing coil and magnetic deflecting coils are arranged around the envelope, an output coil 39 being included in a circuit from the anode 21 to the cathode. An optical image is focused on the mosaic screen the individual elements being variably positive according to the variation of the image ; there will be no space charge due to photo emission as the finger 16 is at high potential. The cathode beam is scanned over the mosaic surface, the potentials of the anode 21, finger 16 and screen being arranged so that the electrons in the beam have approximately zero velocity as they impact the screen ; electrons are absorbed from the beam by the elements, individually, according to their acquired positive potential, to bring the elements to a datum value, the unabsorbed portions of the beam returning to the anode 21 and giving a measure of the illumination of the elements and therefore being usable as signal means.
Patent GB-631695-A (GB)
Title: Improvements relating to respiratory appliances
IPC: B63C11/02
Filed: 1947-05-19
Abstract: 631,695. Respiratory appliances. ECKINGTON, F. J., (formerly SMITH, F. J.). May 19,1947, No. 13426. [Class 81 (ii)] [Also in Group XXI] A respiratory appliance for use in the water comprises an air intake valve 11 normally maintained above water level by means of a buoy 15 rigidly mounted on the stem 10 of the valve, the valve being connected to a face mask 23 by means of a flexible tube 12. A float 18 is slidably mounted between the valve and the buoy, so that when the valve becomes submerged it is closed by the float. The face mask 23 is provided with a liquid container 28 and a waterproof bag 24 containing food pellets.
Patent GB-400124-A (GB)
Title: Improvements in piston rings
IPC: F16J9/02
Filed: 1933-05-09
Abstract: 400,124. Piston rings. BUTTERWORTH, J., High Meadow, Swinton, Lancashire. May 9, 1933, No. 13429. [Class 122 (i).] In a packing comprising a rectangularsection ring A and an L-section ring B, one or both of the rings is dished. Relative rotation of the rings is prevented by a peg C, Fig. 1, which has a bevelled head ; the ends of the ring A are bevelled so that if the ring collapses its ends are forced against the groove to prevent breakage. Alternatively the ring. B is, formed with a bevelled portion D, Fig. 1. The same result is achieved by bevelling the ends of the ring A, as shown at E, Fig. 2, the pin F being of ordinary construction. Specification 293,580, [Class 122 (i), Engine and like cylinders &c.], is referred to.
Patent GB-296655-A (GB)
IPC: B63C1/02
Filed: 1928-05-09
Abstract: 296,655. Howaldtswerke Akt.-Ges. Oct. 10, 1927, [Convention date]. Addition to 289,840. Floating docks.-The floating dock for hydroplanes described in the parent Specification is provided with air chambers in the bottom or platform c, so as to reduce the lifting effort required and stabilize the structure. As shown, the platform has side tanks g which may be permanently empty, and a middle tank h adapted for flooding. In a modification the guidemembers b<1> are omitted and the bottom b is supported solely by the lifting-gear. The platform c may be adapted for running into and out of the dock.
Patent GB-1387422-A (GB)
Title: Electrical control methods
IPC: G08C19/28
Filed: 1971-05-07
Abstract: 1387422 Remote control PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 16 Feb 1972 [7 May 1971] 13698/71 Heading G4H In a remote control apparatus, selection of a switch causes a diode matrix to provide a coded output indicating the required command or object to be controlled. In the embodiment of Fig. 1 (not shown), intended for the selection of a slide in the display apparatus of Specification 1,375,205, depression of one of 27 switches (26 slides, plus a switch for returning a selected slide to its magazine), results in a 5-bit parallel binary output which is fed to the display control. The embodiment of Fig. 3 comprises a transmitter 34 connected by lines 32 &c. to a receiver 37-39. A pulse generator 41-42 in the receiver energizes a ring counter 33 whose outputs sequentially energize the diode matrix through any of 15 switches which have been depressed to provide a binary output 32. The pulse signals are amplified at 37, decoded at 38 and passed to fifteen amplifiers 44 each having an operational time constant long enough to provide a continuous output when actuated by pulses from the corresponding decoder. The resulting signals 45 are then fed to their respective control circuits.
Patent GB-835521-A (GB)
Title: Process for the manufacture of benzyl nitroacetate
Inventor: TAYLOR ALAN
Filed: 1958-04-30
Abstract: Benzyl nitroacetate is manufactured by the action of benzyl alcohol on a salt of nitroacetic acid in the presence of hydrogen chloride. In an example, benzyl alcohol is saturated with dry hydrogen chloride at 0 DEG  C., and finely-powdered dipotassium nitroacetate is then gradually added, while hydrogen chloride is passed into the well-stirred mixture and the temperature is allowed to rise to 10 DEG C.  The supply of HCl gas is then discontinued, and the reaction mixture is stirred for 4 hours at 10 DEG  C., and then for 18 hours at 0 DEG  C.  Methylene dichloride is then added and the mixture is filtered.  The filtrate is washed with water, and then submitted to distillation under reduced pressure to isolate the benzyl nitroacetate, which is obtained in about 70% yield.