baber/WOPTO huggingface dataset:
Patent GB-883102-A (GB)
Title: Improvements in or relating to friction clutches
Inventor: PETRIE JAMES ALEXANDER
IPC: F16D25/10
Filed: 1959-06-25
Abstract: 883,102. Clutches. ROLLS-ROYCE Ltd. June 22, 1960 [June 25, 1959], No. 21908/59. Class 80 (2). A transmission which may be used between a low pressure turbine of a gas turbine engine of a rotary wing aircraft and an auxiliary compressor, comprises a multi-plate friction clutch 116 driving a hydrodynamic coupling 123 which can be bridged by a multi-plate friction clutch 128. As shown, an input shaft 110 has a spline connection 112, 113 with a casing 115 of the clutch 116, the driven plates of which are splined to a sleeve 121 fast with a casing 122 of the coupling and a casing 127 of the bridging clutch 128. The coupling turbine 124 is secured to an output shaft 125, and the driven plates of the bridging clutch 128 are splined to a sleeve 131 fast with the output shaft. In operation, high pressure oil is supplied through a pipe 135 to the right-hand side of a wall 134 of the clutch casing 115 which is moved to the left, under combined hydrostatic and centrifugal pressure, to engage the clutch 116. The pump 126 of the coupling is thus driven, but the coupling is initially empty. Oil from the engagement chamber of the clutch 116 overflows through apertures 121a into the coupling, so that drive is transmitted to the output shaft. Oil from the coupling flows through a line 131a to an engagement chamber 132a of the bridging clutch 128 which is thus engaged to give direct drive. In order to separate the plates of the clutch 116 when disengaged, slotted spring rings 136 are provided adjacent the outer periphery of the driving clutch plates and spring rings 137 are provided adjacent the inner periphery of the driven clutch plates. In a modification, the coupling turbine is fast with the coupling casing and with the easing of the bridging clutch; and the output side of the input clutch 116, the coupling pump and the input side of the bridging clutch 128 are fast with a sleeve closely surrounding the output shaft.
Patent GB-698296-A (GB)
Title: Improvements in or relating to television receiver circuit arrangements
IPC: H04N5/16
Filed: 1951-09-20
Abstract: 698,296. Television. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Sept. 20, 1951 [Sept. 23, 1950], No. 22049/51. Class 40 (iii). A television receiver employs a single discharge tube . in a circuit arrangement for safeguarding the cathode-ray tube upon the occurrence of the fault in the scanning system and for re-introducing the direct current component in the signal reproduced by the cathoderay tube. In Fig. 1 the video signal 1 is fed to the cathode 7 of the cathode-ray tube through amplifier 4, and by virtue of the preceding couplings does not contain the direct current component. Conventional line and frame time-base generators 21 and 26 apply currents to the deflecting coils 23 and 28. Connected to the cathode 7 is the anode of a triode 11 the cathode of which is heated by the voltage drop across a resistor 14 in series with the time-base supply to the frame deflection coils 28. The triode is normally biased to be non-conductive by a negative grid potential applied through resistor 20 and receives positive pulses 30 from the line time-base generator 21 approximately coincident with the synchronizing signals 2 in the video signal. The centre-tap of resistor 14 connects through a condenser 15 to a point of constant potential, earth as shown, and the grid 9 of the cathode-ray tube receives the potential developed across this condenser via a potentiometer 16. In operation, the triode is rendered conducting during the period of each synchronizing pulse and allows condenser 15 to change to a potential equal to the peak value of the pulse, the potential being applied to the cathode-ray tube grid to restore the direct current component to the reproduced signal. Should either of the time-base generators fail, triode 11 becomes non-conducting and the charge on condenser 15 leaks away, allowing grid 9 to return to the potential of point 17 which is sufficiently negative to cut off the beam. Potentiometer 16 is adjusted so that the black level of the video signal is coincident with the cut-off point of the cathode-ray tube. In an alternative arrangement the filament of triode 11 may be connected in series with a resistor shunted by deflection coil 28. Another embodiment, Fig. 2 (not shown), employs a generally similar circuit re-arranged for the video signal to be fed to the cathode-ray tube grid.
Patent GB-749106-A (GB)
Title: Improvements in or relating to transistor cascade amplifiers
IPC: H03F1/34
Filed: 1954-07-28
Abstract: 749,106. Transistor amplifying circuits. PHILIPS ELECTRICAL INDUSTRIES, Ltd. July 28, 1954 [July 30, 1953], No. 22059/54. Class 40 (6). In a cascaded transformer coupled earthed base amplifier, the emitter of the last transistor is connected to its base over a transformer winding and a capacitor, the common circuit supplying a negative feedback signal to the first transistor. An input signal is applied over transformer 1, Fig. 1, to point contact transistor 2, the collector circuit being matched over phase reversing transformer 4 to the emitter circuit of point contact transistor 3. The emitter circuit is decoupled over resistor 9 and capacitor 10 so that the signal fed back over resistor 8 to the base circuit of transistor 2 depends on the collector current of transistor 3 which is thereby linearized. An impedance Z may be employed to give a response varying with frequency and the output is derived from transformer 5. In a modification, Fig. 2 (not shown), employing junction transistors, the feedback signal is applied to the emitter circuit of the first transistor. In a further modification, Fig. 3, a junction transistor 2<SP>1</SP> feeds a point contact transistor 3. The working points of the transistors are stabilized by employing a resistor 16 decoupled by capacitors 10, 15 to provide the collector supply for transistor 2<SP>1</SP>, the windings of transformer 4 being connected at point 17. Inductors may be connected in series with resistors 8 or 9 to give frequency dependent feedback.
Patent GB-583626-A (GB)
Title: Improvements in frequency modulation networks
IPC: H04B14/00
Filed: 1944-11-09
Abstract: 583,626. Frequency modulation. PHILIPS LAMPS, Ltd. Nov. 9, 1944, No. 22060. Convention date, Nov. 9, 1943. Drawings to Specification. [Class 40 (y)] The frequency modulated transmitters of a network have different mean carrier frequencies but overlapping frequency deviation ranges and are modulated co-phasally with the same signal. The carrier frequency separation is at least twice the highest transmitted modulation frequency and the receivers, which may be tuned to any one transmitter, are of the type described in Specification 8584/44 (as open to inspection under Sect. 91), in which a feedback circuit reduces the frequency deviation range and a narrow band I.F. amplifier is used. Specification 599,907, [Group XXXV], also is referred to.
Patent GB-1017037-A (GB)
Title: Improvements in or relating to a method of electroplating with zinc or cadmium
IPC: C25D3/24
Filed: 1964-05-28
Abstract: Alkaline cyanide Zn or Cd electroplating baths include sufficient soluble Li compound to prevent ageing of the bath by the formation of soluble alkali metal carbonates and soluble iron cyanides.  In practice a soluble lithium compound is included in the bath to provide a Li content which is at least 5% of the alkali metal content.  For typical cyanide baths this corresponds to the equivalent of LiOH.H2O of at least 3 oz./U.S. gallon for zinc baths and at least 2 oz./U.S. gallon for cadmium baths. If desired the whole of the alkali metal content may be provided by lithium compounds.  The solutions may contain known brighteners such as salts of Mo, Co, Ni; NaHSO4, NaCNS; sulphides of Na, K, or Ca; dextrin, vanillin, gum arabic, or aldehydes.
Patent GB-1244595-A (GB)
Title: Improvements in or relating to an arrangement for gripping sheet material
Inventor: GUTSCHE ROLF
IPC: B41F21/10
Filed: 1970-05-07
Abstract: 1,244,595. Sheet grippers. POLYGRAPH LEIPZIG DRUCKMASCHINENWERK PLANETA RADEBEUL. VEB. 7 May, 1970, No. 22092/70. Heading B6C. In a printing machine the sheet grippers 2 are connected together but loosely mounted on a non-rotatable shaft 1 and a rod 12 is connected to one gripper the rod being subjected to an electromagnetic winding 4.3 and an electromagnetic winding 4.2. The gripping end 2.2 of the one gripper is attractable into sheet holding position by a further electromagnetic winding 9. All the windings are connected in a circuit which is controlled by a rotating connector disc 10 and contact points 13.1, 13.2, 13.3, the disc being rotatable in synchronism with the machine mounting the grippers. In operation, winding 4.2 attracts the grippers into sheet holding and gripping position and the winding 9 holds the grippers in this position. Winding 4.3 is a reverse winding and when energized causes the grippers to move to release position. In a modified arrangement the reverse winding 4.3 is replaced by a spring acting between a fixed point and the tip of the gripper remote from the end 22.
Patent GB-944779-A (GB)
Title: Twisted tooth lock washers
IPC: F16B39/24
Filed: 1962-06-07
Abstract: 944,779. Making lock washers; stamping. ILLINOIS TOOL WORKS Inc. June 7, 1962 [Aug. 14, 1961], No. 22104/62. Headings B3A and B3Q. [Also in Division F2] A method of making a lockwasher having an annular body provided with inner and outer margins 24, 26 and a series of twisted radial prongs 28 extending outwards from the margin 26 or inwards from the margin 24, comprises providing a substantially flat sheet material blank having an annular body and a plurality of prongs having roots integrally joined to and spaced circumferentially around a margin of the body, embossing circumferentially adjacent areas of each of the roots generally axially in opposite directions and simultaneously twisting the prongs about their radial axes. Dies 58, 60 for making the lockwashers each comprise a shank having teeth or ribs 64 formed at the circular end. Each of the ribs has a generally triangular cross-section defined by opposite flanks; the angles of inclination of the flank surfaces with respect to a plane perpendicular to the central axis of the shank are unequal.
Patent GB-167953-A (GB)
Title: Sound chambers for musical instruments
IPC: G10D3/02
Filed: 1920-07-24
Abstract: 167,953. Humphries, W., (Bremer, G.). July 24, 1920. Violins &c. - The bodies of violins, violoncellos, and the like are formed in halves 1, 2, each hollowed out from the solid wood, glued together along thickened abutting edges 6. The internal cross-section is preferably elliptical, and the walls 5 of the bow recesses are either integral with the halves of the body, or, as indicated, made separately and then attached.
Patent GB-797392-A (GB)
Title: Improvements in phosphoric esters
IPC: C07F9/117
Filed: 1956-07-17
Abstract: The invention comprises compounds of the formula: <FORM:0797392/IV (b)/1> wherein X is oxygen or sulphur, R is an alkyl group of 1-5 carbon atoms and Z is a trimethylene or tetramethylene group or a group of the formula: <FORM:0797392/IV (b)/2> The compounds are made by reacting the corresponding dialkyl halophosphate or dialkyl halothionophosphate with an alkali metal, e.g. sodium, salt of the enol form of the corresponding carbocyclic keto ester, preferably in an inert solvent such as benzene or ether.  The halophosphate or halothionophosphate reactant is preferably a chloro phosphate or thionophosphate. The compounds are used as insecticides.  Examples describe the preparation of 1-carboethoxycyclopentene-1-yl-2 diethyl phosphate; 1 - carboethoxycyclopentene - 1 - yl - 2 diethyl thionophosphate; 1 - carboethoxycyclohexeneyl-2-diethyl phosphate and 1 : 4-dicarboethoxycyclohexadiene - 1 : 4 - ylene - 2 : 5 bis - (diethyl phosphate).  Many starting materials which may be employed according to the invention are specified.ALSO:Phosphoric esters of the general formula: <FORM:0797392/VI/1> wherein X is oxygen or sulphur, R is an alkyl group of 1 to 5 carbon atoms and Z is a trimethylene or tetramethylene group or a group of the formula: <FORM:0797392/VI/2> are used as insecticides, suitably in the form of dusts, wettable powders or emulsifiable concentrates.  Suitable compositions are for example a dust comprising 5 per cent of the phosphoric ester dispersed in 95 per cent of attapulgite, a wettable powder in which the phosphoric ester is mixed with attapulgite, a proprietary mixture of diatomaceous earth and polyoxyethylated tall oil and animal glue, or an emulsifiable concentrate of the phosphoric ester in xylene containing a polyoxyethylated phenol. Specified active compounds include 1 - carbethoxycyclopentene - 1 - yl - 2 - diethyl phosphate, 1 - carbethoxycyclopentene - 1 - yl-2 - diethyl thionophosphate, 1 - carbethoxycyclohexene - 1 - yl - 2 - diethyl phosphate and 1 : 4 - dicarbethoxycylohexadiene - 1 : 4 - yl-2 : 5-bis-diethyl phosphate.
Patent GB-468586-A (GB)
Title: Improvements in methods of treating rubber
IPC: C08J3/12
Filed: 1936-08-11
Abstract: Powdered or granulated rubber is obtained by dispersing rubber and vulcanizing agents, with or without fillers, accelerators and other ingredients, in a rubber solvent which is capable of being steam distilled, then emulsifying the dispersion thus obtained in water, and finally heating the emulsion to eliminate the solvent and at least partially cure the rubber.  After elimination of the solvent, a salt may be added to raise the boiling point of the water.
Patent GB-268641-A (GB)
Title: Improvements in film-feeding devices for kinematographic apparatus
IPC: G03B1/18
Filed: 1926-09-08
Abstract: 268,641. Levis, B. G., Lengenfeld, H., and Wurm, W. Sept. 8, 1926. Kinematograph apparatus. - In pin feed mechanism, a carriage 5 is reciprocated along guide rods 7, 8, parallel with the film, by means of a crank pin 3 on a disc 2 engaging a slot in an arm 18 secured to the carriage, and the feeding pin 14 is moved into and out of engagement with the film by means of a guide rail 12, pivoted at 17, and rocked by a lever 9 which is pivoted at 10 and controlled by pins 15 engaging above and below a cam 19 arranged round the disc 2.
Patent GB-610016-A (GB)
Title: An improved resonance receiving relay
IPC: H02J13/00
Filed: 1944-11-10
Abstract: 610,016. Selective signalling. LANDIS & GYR SOC. ANON. Nov. 10, 1944, No. 22214. Convention date, Nov. 16, 1943. Drawings to Specification. [Class 40 (i)] [Also in Group XXXVII] In a system of the type in which an A.C. impulse produces a characteristic effect in accordance with its position in a time cycle, the resonant circuit in which the receiving relay (see Group XXXVII) is connected is tuned by modifying the magnetic circuit of the relay. The relay is so constructed that a strong signal saturates a part of the magnetic circuit and so mistunes the receiving circuit and limits the maximum value of the signal.
Patent GB-236885-A (GB)
Title: Improvements in or relating to internal combustion engines
IPC: F02B33/26
Filed: 1924-09-20
Abstract: 236,885. Ocampo, S. July 12, 1924, [Convention date]. Regulating. - In fourstroke engines, means are provided for admitting, at the lower end of the cylinder, scavenging - air towards the end of the explosion stroke, and, if desired, also supercharging- air towards the end of the admission stroke. In the engine shown, air is admitted during one or both upstrokes to the crank case through mechanicallyactuated valves 12, and at the end of the succeeding downstroke is compressed through ports 9 in the piston, ports 8, passages 7, and tangentially inclined ports 6 when these are uncovered by the piston. The supercharging action may be reduced or entirely cut out by axial adjustment of the cams 13 actuating the valves 12 so that these valves are opened for a less time, or not at all during the exhaust stroke. At slow speeds, the adjustment of the cams may be such that the valves 12 are not opened on either of the upstrokes. The crank case is compartmented by partitions arranged between adjacent cylinders. The axial adjustment of the cam shaft may also regulate the air valve of the carburettor through linkage connections. Valves.-Two beat valves 12 may be provided to each compartment of the crank case. Or rotary valves may be used, arranged in pairs, one admitting the air for scavenging to the crank case, and the other the air for supercharging, the amounts of air admitted being regulated by the throttle valves.
Patent GB-1376214-A (GB)
Title: Tool holder for use with soldering instrument
IPC: B23K3/03
Filed: 1972-03-06
Abstract: 1376214 Soldering instrument holder W S FORTUNE 6 March 1972 [8 March 1971] 22358/74 Divided out of 1376213 Heading B3R The subject matter of this Specification is a tool holder for a soldering instrument and is substantially as described in parent Specification 1,376,213.
Patent GB-910920-A (GB)
Title: Improvements in or relating to fire-detection circuits
Inventor: ADAMS FRANCIS JOHN
IPC: G08B29/04
Filed: 1960-06-21
Abstract: 910,920. Semi-conductor relay circuits. PYRENE CO. Ltd. June 21, 1961 [June 21, 1960], No. 22476/61. Divided out of 913,666. Class 40 (6). [Also in Group XXXVIII] In a fire-alarm system (see Group XXXVIII), monitoring relay 20 is normally operated by the small current which flows through resistor 18 bridging alarm contacts 13, 14, 15. When an alarm contact closes, the increased current in resistor 19 raises the voltage applied to Zener diode 22, Fig. 1, which thereupon allows current to pass through and operate relay 21. In the embodiment of Fig. 2, the high voltage normally developed across resistor 18 permits the flow of a large current in the collector circuit of NPN transistor 25 to operate relay 20, but the low voltage developed across resistor 23 is not sufficient to cause PNP transistor 21 to conduct. When an alarm contact closes, no voltage is applied to the base-emitter circuit of transistor 25 and relay 20 releases, but the whole supply voltage is now applied to transistor 24 which therefore conducts and operates relay 21.
Patent GB-717131-A (GB)
Title: Improvements in and relating to refined, mineral lubricating oils
IPC: C10M169/00
Filed: 1951-09-26
Abstract: Cloudiness due to flocculation of paraffin waxes in refined mineral lubricating oil is prevented by addition thereto of a small amount, for example 0.05 to 0.001 per cent. by weight, of a resinous substance obtained by extracting raw montan wax with an aromatic hydrocarbon such as toluene.  The extract may be added as such or after removal of solvent therefrom.
Patent GB-992618-A (GB)
Title: Guide spindle for moving tape
IPC: G06K13/24
Filed: 1963-06-06
Abstract: 992,618. Feeding webs. SPERRY RAND CORPORATION. June 6, 1963 [June 18, 1962], No. 22515/63. Heading B6B. [Also in Division G5] A spindle for guiding a tape is provided at one end with an upstanding surface perpendicular to the axis of the spindle, and at the other end with a surface inclined to the axis of the spindle, the inclined surface contacting one side edge of the tape and causing a lateral force on it to maintain the other edge in contact with the upstanding surface. As shown in Fig. 2 the spindle may comprise a frustoconical portion 36 having a conical angle between 20 and 25 degrees and a frusto-conical portion 42 having a conical angle of about 1 degree, the portion 42 forming a gradual transition between frusto-conical portion 36 and a cylindrical end portion 40 which is bounded by a flange 32. In operation a magnetic tape 10 preferably extends round the spindle over an arc of about 20 degrees and the diameter of portion 36 where contected by the edge 13 of the tape is equal to the diameter of cylindrical portion 40. The tension in the tape and the inclination of portion 36 cause a lateral force on the tape which maintains its other edge 11 in contact with the flange 32, thus ensuring the correct positioning of the tape. The spindle is non-rotatable and is secured to a shim plate 15 secured by bolts (not shown) to a base-plate 17. The position of the flange 32 along the axis of the spindle can be adjusted by varying the thickness of the shim plate 15.
Patent GB-638579-A (GB)
Title: Improvements in electrical arrangements for indicating the occupancy of seats
IPC: G08B5/22
Filed: 1948-08-09
Abstract: 638,579. Indicating availability of seats. ROGERS, J. T. Aug. 9, 1948, No. 22521/47. [Class 106 (iii)] The seats 11 in a vehicle or theatre are each arranged to actuate a switch 20, the weight of the seat occupier depressing a rod 14 which during its initial sliding movement in a tube 15 compresses a spring 16 therein and, after a predetermined displacement, moves the tube 16 with it to actuate the switch 20. A spring 21 returns the tube 15 to its upper position when the seat is unoccupied. A lamp indicator board, Fig. 3 (not shown), is provided, the individual lamps thereof being extinguished as the seats corresponding thereto are occupied and a further " Full " lamp is lit when all seats are occupied.
Patent GB-1114247-A (GB)
Title: Infusion apparatus
Inventor: SLOTH CARL
IPC: A61M5/145
Filed: 1964-06-01
Abstract: 1,114,247. Infusion apparatus. H. HESSE. 1 June, 1965 [1 June, 1964], No. 22651/64. Heading A5R. Apparatus for the continuous infusion of parenteral liquids from a supply container 21 through a cannula 40 includes a bubble-collecting vessel 35 and a safety means actuated by a predetermined volume of gas in the vessel to interrupt flow of liquid to the cannula or produce a visible or audible warning. The supply container 21 is connected through a valve 23 to a mechanically operated pump having an adjustable capacity and comprising a cylinder 28 and a piston 27. The pump is connected to an inlet 71 of the bubble-collecting vessel 35 through a valve 32. The operation of the valves 23, 32 is so synchronised with the pump (Figures 2 and 3, not shown) that, on a filling stroke of the pump, valve 23 opens and, on a discharge stroke of the pump, valve 32 opens. The vessel 35 has a vent 41 connected to a vessel 45 by a conduit controlled by a normally closed valve operated by an element 153, which also controls a normally open valve between the vessel and the cannula. A float 85 in the vessel 35 blocks passage of light from a lamp 211 to a photoelectric element 210, unless the amount of gas collected in the vessel reaches a predetermined maximum, when the float falls sufficiently to permit the photoelectric element to receive light from the lamp. This causes a circuit to reverse the valve element 153, so that flow of fluid to the cannula is stopped and gas is vented to the vessel 45, and to operate a warning device. Alternative electric or photoelectric devices for giving warning of excess accumulated gas in the vessel 35 are described with reference to Figures 5a, 5b, 5c, 6a and 6b (not shown). Alternatively, the float, may have upper and lower obturating means (Figure 4 not shown), one controlling the outlet of liquid to the cannula and the other controlling the venting of accumulated air from the vessel.