baber/WOPTO huggingface dataset:
Patent GB-388066-A (GB)
Title: Improvements in or relating to radio and other high frequency circuit arrangements
IPC: H03C1/62
Filed: 1931-08-18
Abstract: 388,066. Wireless transmitting systems ; valve modulating circuits. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., Marconi House, Strand, London, LUNNON, F. C., Westdene, Roxwell Road, and WASSELL, H. J. H., 77, Mildmay Road, Chelmsford, both in Essex. Aug. 18, 1931, No. 23282. Addition to 351,051. [Class 40 (v).] Radio and like valve transmitters are arranged as in the parent Specification so that one or more valves which act as amplifiers during signalling periods have their circuits changed so that they function to maintain a load on the H.T. supply during non-signalling periods ; and the present invention comprises (1) an adaptation of this system to radio telephony and (2) a modified circuit for radio telegraphy. Fig. 1 (Prov.) shows part of the telephony circuit, the remainder being the same as in Specification 351,051. The last amplifying- valve V3 includes in its grid circuit an inductance coil Z1, a modulating-valve MV shunted by a diode valve GL, and a portion P3 of a potentiometer resistance Z. Other tappings P0, P2 connect the grid circuits of earlier valves in the amplifying chain. The resistance Z is in circuit with a battery B1 and a valve K1, the grid of which is energized by rectified speech voltages obtained from the microphone M through an amplifier-rectifier ATD. The microphone is also connected through a transformer MT to the grid of the modulator MV. When speech is being transmitted, the valve K1 is blocked, and the potentiometer inoperative. At a predetermined period after the cessation of speech, the valve K1 becomes conductive, and the tappings P0, P2, P3 function as in the parent Specification to suppress the carrier wave, whilst leaving the valve V3 and possibly earlier valves in the chain, as a load on the H.T. supply. The diode valve GL, which as shown comprises a triode valve with a connection between grid and plate, enables the negative potential at P3 to reach the grid of the valve V3. Fig. 1 (Comp.) shows the modified circuit arranged for telegraphy. The signal key or like interrupter M1 which is opened for signals, and closed for spaces, is shunted by a source B11 and a resistance R, and is connected across the grid and filament of a valve K1, the plate circuit of which includes a source B1 and the potentiometer Z. The tappings P0, P2, P3 are connected to the grids of the transmitter valves, the connection of tapping P3 including a high resistance L. If desired the valves MV, GL, Fig. 1 (Prov.), may be retained instead of the resistance L, and the grid of the-valve MV suitably biased.
Patent GB-1393995-A (GB)
Title: Throwaway cutting inserts for a cutting tool
IPC: B23B27/16
Filed: 1972-05-17
Abstract: 1393995 Cutting inserts CUTANIT Ltd 17 May 1972 [21 May 1971] 23284/72 Heading B3B A throwaway cutting insert 1 for a cutting tool has the shape of a parallelogram when viewed in plan and has a clamping region which is formed by two curved surfaces 5 each part of a surface of revolution, the surfaces having a curved line of intersection and include an obtuse angle. The surfaces may be part cylindrical or conical and symmetrical relative to the longitudinal plane of the insert. The insert 1 is secured on the tool body 3 by a clamp 4 and is supported on a base member 2 which has seating surfaces which co-operate with these on the insert. The upper side of the insert is provided with a chip breaker groove 6 and a wedge 7 upon which the clamp 4 acts.
Patent GB-333723-A (GB)
Title: A new or improved method of supporting and operating sun blinds or awnings
IPC: E06B9/68
Filed: 1929-07-30
Abstract: 333,723. Page, A. C. July 30, 1929. Window blinds.-In sunblinds or a.wnings of the kind in which the side arms, carrying the blind, are slidably arranged in guides within the building &c., each side arm consists of a rectangular tube, strengthened by an inner oval tube and arranged between parallel spaced guides. In the construction shown each side arm E is slidably mounted in a guide consisting of two spaced rectangular tubes D, D<1> secured inside the building, and is projected to overhang the pavement &c. by an endless chain a<1> passed over sprocket wheels B and E at each end of the guide and connected to a lug a<2> on the arm. The wheel B is rotated by an endless chain h<3>, passed over a sprocket wheel on the main driving shaft H. The shaft H may be arranged at the rear end of the track and the sprocket wheel B fixed thereon thus dispensing with the chain h<3>. The arm E consists of a rectangular tube with an inner oval reinforcing tube which slides on an oval tube carried by the guide. In order to allow the front end of the arm guide to fall when the arm E is projected, the inner end of the guide is pivoted to a fixture inside the building and the front end is supported by a chain J secured to the front end of the guide and passed over a spring-controlled wheel j<2> carried by the roof of the building, thence under a wheel j<3>, carried by the front end of the guide, and attached to one end of a rod j<4> which has, at its other end, an eye j<5> slidable on a guide rod j<6> carried by a bracket at the top of the guide. When the arm E is within the guide, the spring controlling the sprocket wheel j<2> is sufficient to counterbalance the weight of the guide &c. but when the arm E is projected outwards the outer end of the guide drops until the eye j<5> has reached the end of its travel on the rod j<4>. On retracting the arm E the lug a<2> thereon contacts with the eye j<5> which is moved backwards along the rod j<4> thus operating the chain J to raise the outer end of the guide. Instead of the chain J passing over a spring controlled wheel j<2> it may pass over a pulley fixed to the main shaft H and then be connected to the rod j<4>. In a modification, the guide is lifted by a counterbalance weight suspended by a chain passing over a loose wheel on the shaft H, the other end of the chain being secured to the front end of the guide.
Patent GB-912672-A (GB)
Title: Indicating assembly
IPC: H01R13/20
Filed: 1960-07-05
Abstract: 912,672. Visible signalling apparatus. RADAR RELAY Inc. July 5, 1960 [July 7, 1959], No. 23416/60. Class 118. [Also in Groups XXV and XXXIII] An indicator unit, for use with other similar units on a panel to provide visual monitoring of remote contacts, comprises a housing 10 (Fig. 3), mountable on a panel 16, a removable annunciator member 22 which fits on to the housing so as to be flush with the panel, and latching means for releasing the annunciator member from the housing when it is pushed in the direction of the housing from its normal position. As described, the annunciator member 22 carries at its rear a plug 30 having a ball-shaped end 30a which is engaged by a resilient jack 31 in the housing 10. To release the member 22 it is pushed rearwardly, whereupon the collar 38 on the plug 30 pushes the cylindrical member 34 carried by the plug 30 into the jack 31 (Fig. 5), so as to disengage the end 30a of the plug 30. At the same time the spring 42 is compressed between the collar 40 and the rear face of member 22 so as to urge the member 22 forwardly to the released position. Circuit arrangements, Fig. 9. Each housing 10 contains a single relay 50 having contacts 52 and 54 and two lamps 26 to illuminate the member 22, and has terminals 28a-28e and 32, the last of which is connected to the contacts 106 to be monitored by the unit concerned. Closure of contacts 106 (to ground) lights the lamps 26 of the unit and the common warning lamps 81 and 90, all of which glow brightly. The operator then closes the reset switch 100 to bring up the relay 50, which holds over contacts 54 and douses the common warning lamps. All lamps may be dimmed by operation of switch 82. Test switch 80 simulates closure of the monitored contacts.
Patent GB-743175-A (GB)
Title: Improvements relating to thermostats
IPC: G05D23/12
Filed: 1951-10-08
Abstract: 743,175. Temperature-responsive actuating- elements. SAMSON APPARATEBAU-AKT.- GES. Oct. 8, 1951 [Oct. 9, 1950], No. 23423/51. Class 64(2). In a temperature responsive device (e.g controlling heat or temperature by means of a rod 8, Fig. 1 operating a valve or switch according to the expansion of fluid 2 in a chamber 4 tube 3 and pilot bull 1) which has a resilient cylinder extending in to a container 1, excess pressure is absorbed by a gas-filled ex tensible member such as a bellows having concentric corrugated tubular walls 24, 25 and filled with ai: 28 at 20-100 atmos pheres. In norma working, a bellows  only is operated bu after this is com pletely contracted, the safety bellows 24, 25 acting like a spring, is contracted. In one embodiment, the pilot bulb 1 is sealed by a bellows 9 which constitutes one form of the resilient cylinder and is adjustable in length, to regulate the operation of the rod 8, by a sleeve nut 14, Fig. 2, rotated by means of its squared end 15 to raise or lower a screwthreaded adjusting spindle 12 attached to the base 11 of the bellows 9. The nut 14 does not move axially, being held from downward movement by its flange 16 resting on a base 17, until excess pressure causes the bellows 9 to contract against the pressure in the separate safety bellows 24, 25. In Fig. 4, the safety bellows slaes the bulb 1 and thus constitutes the resilient cylinder. This device is regulated by rotation of a sleeve 45 to raise, by means of an internal screwthread, a member 43 supporting the spindle 12 by means of a nut 40. The device is set according to the reading on a scale 46 indicated by an edge 47 on the sleeve 45. In embodiments having similar safety bellows, Figs. 3, 5 (not shown), a sleeve nut on the spindle rotates a pointer by means of a worm gear to indicate the temperature setting or, instead of the spindle, a cord or tape rotates a pulley bearing a pointer. The setting is made in the latter embodiment by adjustment of the tension in a spring mounted on the pulley-spindle to oppose pressure in the safety bellows 24, 25.
Patent GB-663768-A (GB)
Title: Improvements in or relating to weighing apparatus
IPC: G01G19/16
Filed: 1948-09-06
Abstract: 663,768. Weighing apparatus. WILLIAMS & SONS, Ltd., S., and GAMBLE, F. D. M. Aug. 24, 1949 [Sept. 6, 1948], No. 23441/48. Class 143. In a crane load weighing apparatus similar to that described in Specification 663,766, a compensating unit corrects the weight indicated for variations in the rate of the counterbalancing spring 8 and for the weight of hoisting and luffing cables supported by the weighing mechanism. This unit comprises an axially fixed piston 25 which is continuously rotated to reduce friction, a cylinder 3 which is axially movable against the counterbalancing spring 8 on receipt of oil at a pressure proportional to the load, and a bell crank lever 1 one end 4 of which is connected with the weight indicating apparatus and the other end 5 of which is constrained to move along a path determined by the shape and position of a cam bar 6. Bar 6 is curved to correct movement of the end 4 of the bell crank for movement of a chain 17, coupled to the output shaft of a differential (not shown) which summates movements of the hoisting and luffing winches, rotates screws 11, 12 which through nuts 9, 10, alter the position of the bar. 6 in such a manner that movement of the end 4 is also corrected for the weight of hoisting and luffing cables supported by the pressure generating member (not shown) connected with the cylinder 3.
Patent GB-864423-A (GB)
Title: Safety control for gas heated appliances
Inventor: LAUNCHBURY ALAN
IPC: F23Q9/12
Filed: 1957-07-25
Abstract: 864,423. Valves. SPERRYN & CO. Ltd. June 25, 1958 [July 25, 1957 ; Oct. 1, 1957], Nos. 23559/57 and 30674/57. Class 135. A gas burner safety control for a cooker or oven comprises a pilot jet 27 lit automatically by igniter 26 when gas passes a solenoid valve 30 opened by a preset timer, a thermal element 22 heated by the jet, and a spring-closed main burner gas valve 14 opened by the thermal element and closing when the pilot goes out. Members 22, 26 and 27 are housed in a flash tube 23. When coil 33 is de-energized similarly wound permanently-energized coil 34 allows the valve 30 to open under gas pressure. Energization of coil 33 closes the valve 30. The supply of gas to the solenoid valve may be controlled by a cock in series with a valve controlled by an oven thermostat which will vary the pilot flame, element 22 and valve 14.
Patent GB-918889-A (GB)
Title: Improvements in or relating to semi-conductor arrangements and to methods of making such arrangements
IPC: H01L21/18
Filed: 1961-06-29
Abstract: 918,889. Semi-conductor devices. SIEMENS & HALSKE A.G. June 29, 1961 [July 1, 1960], No. 23567/61. Class 37. [Also in Group II] A semi-conductor arrangement is made by depositing a first semi-conductor from a heated reaction mixture containing a compound thereof on a monocrystalline body of a second semiconductor of higher melting-point and simultaneously or subsequently heating to form an alloy of the two semi-conductors. A transistor is made as follows. A monocrystalline silicon wafer 6 (Fig. 1), after etching, is mounted on an inert support 5 in a quartz reaction chamber 2 and heated in a flow of hydrogen containing germanium tetrachloride or germanium chloroform. During the reaction the wafer is maintained at the melting -point of the desired alloy or below that of germanium by any of several heating methods described. If the temperature is that of the alloy the latter forms as the deposition proceeds. Otherwise in a flow os hydrogen the temperature of the assembly is subsequently raised to the melting-point of the desired alloy, and after equilibrium is attained, slowly reduced by 20 ‹ to 200 ‹ C. and then maintained until the recrystallized alloy becomes monocrystalline. The deposition process is finally repeated with the substrate below the melting-point of germanium to produce a monocrystalline germanium layer. The alloy layer is made N-type by doping either the first reaction mixture or the silicon substrate and the germanium layer P-type by doping the second reaction mixture. After removal of the silicon substrate and subdivision of the wafer a pellet 11 (Fig. 3) of gold antimony is alloyed to the P germanium base to form a collector junction and contact. Alternatively a further N-type germanium collector layer is provided by deposition in the manner described. Ohmic contacts 15 of gold antimony and 14, 16 of aluminium are then provided to the emitter and base zones. The base contact may alternatively be a ring of gold-boron alloyed direct to base zone 12. In an alternative method after formation of the germanium silicon alloy silicon is deposited from an acceptor containing reaction mixture of hydrogen and silicon tetrachloride or silicon chloroform to form a P-type silicon layer. In this case the substrate, made of P-type silicon is retained to form one zone of a PNP transistor.
Patent GB-223231-A (GB)
Title: Improved electric current rectifier for use in effecting electrical measurements andthe like
IPC: H02M7/36
Filed: 1924-10-07
Abstract: 223,231. Janvier, W. J. H. Oct. 10, 1923, [Convention date]. Electromagnetic interrupters. - A vibrating rectifier for rendering alternating currents detectable or measurable by continuous-current apparatus comprises a blade L set in vibration by passing alternating current through a coil E, which is connected to the source through a variable phase-transformer D in order that the commutation may be adjusted to take place at the zero points of the alternating wave. The coil E is mounted on a reduced pole piece of a permanent magnet C and is supplied with current from a phases transformer D through a commutator J and variable inductances F, I. The blade L actuates a contact-member G through a resilient arm S covered by an insulating plate i. The arm G is mounted on a spring r, Fig. 3, secured at one end to a screw h and at the other end to a sleeve g slidably mounted in a nut n. The spring may be adjusted angularly by adjusting the screw h and rotating the nut n through a worm v, an additional nut m being provided for regulating the tension of the spring. The end of the contact-member G may be slotted at f, and the fixed contact, screws H, K may be so adjusted that the slotted arm makes contact with one screw before it leaves the other, rectification then taking place without interruption of the circuit.
Patent GB-1336368-A (GB)
Title: Anti-static yarns
IPC: D02G3/00
Filed: 1971-04-19
Abstract: 1336368 Anti-static yarns BRUNSWICK CORP 19 April 1971 [13 March 1970] 23785/ 71 Heading D1W A composite textile yarn comprises a non- metallic yarn including monofilament strands and a spun blended yarn plied with said non- metallic yarn, said blended yarn being formed of metallic and non-metallic staple fibres, said metallic fibres being distributed in said blended yarn to be incapable of sustaining an electric current flow continuously therethrough. The non-metallic yarn and the non-metallic staple fibres may be formed from cellulose acetate or triacetate, rayon, fluorocarbon, or polypropylenes. The non-metallic part of the spun blended yarn may be formed from sacrificial material such as water-, or chemically-soluble, material, e.g. polyvinyl acetate or chemically soluble rayon. The metallic fibres may have rough, non-machined, unburnished outer surfaces.
Patent GB-1224445-A (GB)
Title: Improvements in process for producing polyamide acid and polyimides
Inventor: HOBACK JOHN THOMAS
IPC: C08G73/10
Filed: 1969-05-09
Abstract: 1,224,445. Polyamide acid solution. GENERAL ELECTRIC CO. 9 May, 1969 [25 July, 1968], No. 23793/69. Heading C3R. A polyamide acid solution is prepared by dissolving EH 2 N-R<SP>1</SP>-NH 2  in a solvent comprising #40 wt. per cent aliphatic polyol and adding F E and F being in approximately equivalent quantities, the temperature being maintained <100‹0. R<SP>1</SP> is a divalent radical containing #2 C atoms, each NH 2 - being attached to a separate C atom. R is a 4-valent radical containing # 1 benzene ring, the 4 -CO- gps. being attached directly to separate C atoms in a ring, the members of each pair of -CO- gps. forming a -CO-O-CO- gp. attached to adjacent C atoms. -R<SP>1</SP>- is preferably or where -R<SP>11</SP>- is -C m H 2 m-, m being 1-3, or -O-, -S-, -SO-, or -SO 2 -, or and -R<SP>111</SP>- and -R<SP>1111</SP>- are optionally substituted alkyl or aryl groups, a is 1-5, and x is 0 to 100 or more. F may be where A is alkylene or arylene, and Z is H, alkyl, or aryl; or benzophenone-, diphenyl-, naphthalene-, benzene-, perylene-, pyrazine-, or thiophene-tetracarboxylic dianhydride; or bis(dicarboxylphenyl)-(propane, ether, sulphone, ethane, or methane) dianhydride. The polyol is HO(C n H 2n O) s  where n is 2-10 and s is 1-3. In addition to the polyol, the solvent may also contain water and/or other reactive or non- reactive organic solvents, e.g. alcohols, amides, phenols, esters, glycol ethers, ketones, cyclic hydrocarbons, pyrrolidones, dimethyl sulphoxide, dimethyl sulphone, tetramethyleneurea, pyridine, hexamethyl phosphoramide, benzonitrile, or N-methyl morpholine. Monoamines or dicarboxylic acid anhydrides may be added at the start, in the middle, or at the end of the polymerization to chain-stop or modify the polymers. To the polyamide acid solution may be added a nitrogenous base, e.g. NH3, primary, secondary, or tertiary amines, or quaternary ammonium compounds, or heterocyclic compounds, to stabilize the polyamide acid solution and render it electrically conductive so that it may be used for D.C. electrocoating followed by curing. The solution may contain 50-1000 parts solvent per 100 parts reactants. The polyamide acid solutions can be cured to polyimides by heating to 125-130‹ C. or higher; they may be cast to form clear flexible films, e.g. for insulation, or in moulding powders when mixed with fillers, e.g. wood flour, diatomaceous earth, silica, or abrasives, e.g. carborundum or diamond grit. The polymers may also be used to form fibres; as adhesives; as impregnants; or as dielectrics.
Patent GB-238958-A (GB)
Abstract: 238,958. Herring, E. May 29, 1924. Closed solid-fuel stoves; ash - pans; boilers, arrangement of.-In boiler-stoves as described in Specification 219,422. the air supplies to the two parts of the grate are independently controlled by superposed ash-pans A, B.
Patent GB-814083-A (GB)
Title: Record driving support and automatic speed selector mechanism
IPC: G11B19/265
Filed: 1957-07-29
Abstract: 814,083. Record player driving arrangements. FAVARO, S. Dec. 18, 1957 (July 29, 1957], No. 23913/57. Class 40 (2). A record player comprises a case 1, a spindle 2 engaging the centre-hole of a record 6, 7 or 8 and driving means comprising a motor 13 (not shown, see Fig. 4) and friction wheels 9 and 10, A 7-inch diameter record rests on the flange 5 of the spindle 2 and is rotated by the wheel 9 at 45 r.p.m., this speed being achieved by a choice of suitable wheel diameter, motor speed and distance of the wheel 9 from the spindle 2. Records of 10-inch or 12-inch diameter are driven at 33 1/3 r.p.m. by a wheel 10 secured to the same shaft as the wheel 9 and made of larger diameter than wheel 9 to prevent both wheels engaging a record simultaneously. Alternatively the shaft 11 may be mounted at a small angle to the surface of the record. A cover 15 is pivoted to the case at 16 and carries a stabilizing wheel 17 which bears on the central plain portion of the record due to the weight of the cover.. A second stabilizing wheel 18 is situated under the record. A pick-up arm 19 is pivoted to the case and when not in use can be clamped to the cover by a locking-device which also secures the cover 15 to the case 1. This device consists of two links 20 and 21 pivotally connected together, the link 21 being pivoted on the under-side of the cover and having a slot which engages a neck 22 in the spindle 2. The outer end of the link 20 forms a bridge which engages the.pick-up arm when the cover 15 is lowered. Space is available in the case 1 for a transistor amplifier, loudspeaker and motor batteries. Specifications 814,084 and 814,085 are referred to.
Patent GB-458576-A (GB)
Title: Lobster-claw lock
IPC: A22C29/00
Filed: 1936-09-01
Abstract: 458,576. Securing lobsters' claws. BARWOOD, L. J., 8, Wyman Street, Cambridge, Massachusetts, U.S.A. Sept. 1, 1936, No. 23964. [Class 48] A device for securing lobsters' claws during transit &c. comprises two U - shaped members 6, 22 adapted to embrace and bear against one jaw 16 at positions spaced apart, the limbs at each side merging into a common member 7 the free ends of which are rolled into tubular extensions 33 which are twisted together at 37 above the other claw 18 to secure the device in place. Alternatively, the extensions 33 are short and serve to connect the ends of a wire 44 which may be twisted to secure the device. The device may be made from a single blank by slitting and expanding to space members 6, 22 apart. The bights of parts 6, 22 are cupped to provide edges 17, 19, 21, 23 bearing against claw 16, and accidental longitudinal movement may be prevented by applying the device so that one of the cupped portions embraces the projection 29 present on the claw. A modification is described comprising a single U-shaped member provided with the above-mentioned cup formation. Specification 432,688 is referred to.