baber/WOPTO huggingface dataset:
Patent GB-1427526-A (GB)
Title: Frequency response analyser
IPC: G01R27/32
Filed: 1972-08-30
Abstract: 1427526 Analyzing frequency response of circuit under test SOLARTRON ELECTRONIC GROUP Ltd 30 Aug 1973 [30 Aug 1972] 40151/72 Heading G1U A test apparatus of the type that produces a signal 10a, Fig. 1, for application to a system under test and receives a return signal 10b from the system under test, which signal is correlated either with the original test signal or with harmonics thereof, is characterized in that it includes means 33 for rejecting either any D.C. component or any carrier component (when the test signal includes a carrier) present in the return signal, whereby other components, which whilist often of smaller amplitude but usually of greater interest, may more easily be detected. The apparatus operates in two phases. In the first phase the return signal is analyzed and the D.C. component is detected and stored. In the second phase the stored D.C. component is used to back-off the D.C. component present in the return signal and the remaining components of it are analyzed. As described with a test signal of sinwt, the return signal, which may be taken to be of the form, r(t)= ak sinkwt + bk coskwt + 2C is passed by an amplifier 60, Fig. 2, to a multiplier constituted by amplifiers 68, 69, where it is multiplied by sinwt, and the resulting signal, namely r(t)sinwt is passed from the bias rejection unit 33, Fig. 1 (which consists of the circuit shown in Fig.2) to the remainder of the test apparatus when it is again multiplied by sinwt and averaged over a time period long relative to the test signal frequency. This process is performed digitally, as described in U.K. Specification 1378197, and the result, namelyI/T#<SP>T</SP> r(t)sinwtdt, which can readily be seen to tend to C as T tends to infinity, is available in digital form from a device 47. The resulting digital signal representing C is applied to the bias unit 33 where it sets switches (not shown) to cause a d-toa converter 65, Fig. 2, an attenuator 64a and an amplifier 63, to produce a corresponding D.C. signal. In the second phase, the multiplier 68, 69 is set to mutiply by unity, and the D.C. component present in the return signal is back-off by amplifier 60 and resistors R1, R2, and the signal emerging from the bias rejection unit 33, which equals the return signal less its D.C. component, is fed to the remainder of the circuit and analyzed as described in UK Specification 1378197. Multiplication by sinwt by amplifier 68, 69 is effected by applying pulses, from a bistable 22 in the main apparatus, at a frequency of w/2 to a gate FET 1, which with R3=R4, and R5=2R5, causes the input to R3 to be multiplied alternately by plus and minus one. Once the D.C. component has been detected and stored, the gate FET 1 is held open for the duration of the second phase. When the test signal is modulated upon a carrier, carrier components in the return signal are moved in a similar manner to that described above, using in addition, a demodulator 73 and a modulator 72.
Patent GB-1384520-A (GB)
Title: Hydraulic booster with auxiliary power supply and vehicle hydraulic braking system incorporating the same
IPC: B60T13/14
Filed: 1973-08-29
Abstract: 1384520 Hydraulic brake boosters BENDIX CORP 29 Aug 1973 [27 Sept 1972] 40581/73 Heading F2F An hydraulic booster 10 for a braking system comprises a piston 16 slidable in a bore 14 in a housing 12 to form a pressure chamber 18, a first valve carried by the piston and shiftable from a position venting the chamber to a second position, the first valve communicating successively higher pressures into the chamber 18 from a primary source such as a steering pump (34) as the valve is shifted with the piston, a second valve 44, 46 carried by the housing for controlling fluid communication from a secondary source 40 into the pressure chamber 18, and linkage 58 connecting the valves to actuate the second valve when the first valve moves past the second position. As shown, the first valve is a spool valve 60 and includes a cam surface 80 which as the spool is moved further forward when a malfunction causes the steering pump to terminate its high pressure output moves a plunger 54 which transmits its radial movement via an element 52 to a plunger 50 to urge the valve element 44 away from its seat 46 and allow pressure fluid from the accumulator 40 to shift piston 16 and assist brake application.
Patent GB-1159501-A (GB)
Title: Improvements in powderless etching
IPC: C23F1/18
Filed: 1966-09-12
Abstract: 1,159,501. Etching. PHOTO-ENGRAVERS RESEARCH INSTITUTE Inc. 12 Sept., 1966 [12 Nov., 1965], No. 40661/66. Heading B6J. Copper gravure printing plates are etched with a solution containing ferric chloride and an additive selected from (a) halogenated mono carboxylic acids having at least one halogen group substituted on the alpha carbon and containing 2-4 carbon atoms, (b) cyano substituted mono carboxylic acids containing 2-4 carbon atoms, (c) propionic acid, (d) alkali or alkaline earth metal salts of mono carboxylic acids containing 1-4 carbon atoms, or (e) alkali metal salts of halogenated mono carboxylic acids containing 2-4 carbon atoms. Examples of additives are (a) mono chloracetic acid, dichloracetic acid, monobromacetic acid, dibromoacetic acid, tribromoacetic acid, alpha chloro-propionic acid, alpha chloro-beta chloropropionic acid, alpha trichloro-beta chloropropionic acid, alpha bromometa chloro-propionic acid, moniodo acetic acid, alpha iodo propionic acid, alpha iodo-beta bromo propionic acid, alpha chloro-n-butyric acid, alpha chloro-beta chloro isobutyric acid, tri-chloro acetic acid, (b) alpha cyano-beta cyano isobutyric acid, alpha cyano propionic acid, cyano acetic acid, (d) sodium, potassium, barium, calcium, magnesium, or lithium salts of formic, acetic, propionic or butyric acid, (e) sodium monochloracetate. A film-former may also be included, such as formamidine disulphide and salts thereof, e.g. formamidine disulphide hydrochloride, hydroiodide or picrate, thiourea and compounds thereof, and 2,4-diaminophenol dihydrochloride.
Patent GB-1447867-A (GB)
Title: Hammer drills
IPC: H02K7/10
Filed: 1973-08-30
Abstract: 1447867 Percussive drills ROBERT BOSCH GmbH 30 Aug 1973 [31 Aug 1972] 40856/73 Heading B3C [Also in Divisions B4 and F2] An electrically operated hammer drill comprises a two-speed transmission unit having a clutch movable into a central position for disengaging the rotary drive, and a percussive mechanism which is disengageable independently of the rotary drive. As shown in Figs. 1 and 3 in which the drill is set for percussive action only, the output shaft 6 of the motor 4 continuously rotates an intermediate shaft 10 through gears 9, 11, the gears 12, 13 on the intermediate shaft meshing continuously with axially-shiftable gears 15, 16 which are freely rotatable about a hollow output shaft 14 unless selected to be drivingly connected thereto. In the position shown, the gears 15, 16 are in the neutral position where an annular recess 19 is opposite four equi-angularly spaced projections 18 on the shaft 14. When the gears 15, 16 are shifted axially one way or the other by means of a shift fork 17 having spring arms 23 movable from outside the housing by an eccentric shift 24 the appropriate axial grooves 20, 21 in the gears drivingly engage the projections 18. The tool head 37 is connected for axial movement in a sleeve 36 by means of balls 38 and the sleeve is connected to the shaft 14 through a safety clutch having balls 30 which yield against a spring-urged ring 31 when a drill bit carried by the tool head jams; the sleeve 36 is secured against rotation by a dog 45. The tool head is hammered by a striker 62 which is driven through an air cushion created by a crank driven cylinder 61. When the motor is to be connected to drive the percussive mechanism through bevel gears 46, 48, a clutch shaft 47 is shifted to the position shown by an eccentric shift 55 where balls 51 drivingly connect the gear 48 to the shaft 47; when the shaft 47 is raised to disengage the clutch, the balls 51 move into an annular groove 57 from the radial bores 51' in the shaft and recesses 52 in the gear. In a second embodiment, Fig. 4 (not shown) the clutch for the crank mechanism consists of an axially-displaceable gear (66) on the inter- . mediate shaft (65) which can be axially moved to drivingly engage one of the two bevel gears of the crank mechanism. In a third embodiment, Fig. 5, the two-speed transmission unit includes a shift sleeve 74 which rotates with the output shaft 14 and is axially movable from the neutral position shown where drivers 75 are opposite an annular recess 78 to a position within axial grooves 76, 77 in the gears. In a fourth embodiment, Fig. 6 (not shown) the clutch for the crank mechanism consists of a shift sleeve (83) which is axially-displaceable to connect a bevel gear (86) with the crank-shaft (81). A fifth embodiment, Fig. 7 (not shown), illustrates the use of rollers (90) instead of balls in the safety clutch.
Patent GB-913471-A (GB)
Title: Improvements in and relating to polyamines
IPC: C23F11/04
Filed: 1959-12-02
Abstract: Deactivator-antioxidant additives for gasoline are the Schiff bases prepared from salicylaldehyde and a polyamine of formula <FORM:0913471/III/1> where R1 and R2 are phenyl, C1-18 alkyl, a group -CH2CHR5NH2, or a residue of a polyalkylene polyamine chain in which each amino hydrogen has been replaced by -CH2CHR5NH2, and R5 is hydrogen or C1-5 alkyl (see Group IV(b)).ALSO:The invention comprises compounds of formula <FORM:0913471/IV (b)/1> where RH is C6-18 alkyl and R5 is hydrogen or C1-5 alkyl; and a process for the manufacture of compounds of formula <FORM:0913471/IV (b)/2> (where R1 and R2 are phenyl, C1-18 alkyl, group -CH2CHR5NH2, or a residue of a polyalkylene polyamine chain in which each amino hydrogen has been replaced by -CH2CHR5NH2, R5 being hydrogen or C1-5 alkyl) by reacting an amide <FORM:0913471/IV (b)/3> (where R5 is as above, and R3 and R4 are phenyl, C1-18 alkyl, a group -CH2CHR5CONH2, or a residue of a polyalkylene polyamine in which each amino hydrogen has been replaced by a -CH2CHR5CONH2 group) with an alkali metal or alkaline earth metal hypohalite in an alkaline hydroxylic solvent, e.g. aqueous NaOH or KOH, or methanol with halogen and methoxide ion.  The above amides may be prepared by reacting ammonia, a primary or secondary amine or a polyalkylene polyamine with an a ,b -unsaturated primary amide; specified amines are methylamine, ethylamine, propylamine, butylamine, hexylamine, octylamine, dodecylamine, octadecylamine, dimethylamine, diethylamine, dibutylamine, dihexylamine, dioctylamine, dinonylamine, didodecylamine, dioctadecylamine, aniline, ethylene diamine, diethylene triamine, triethylene tetramine, tetraethylene pentamine, and the corresponding polypropylene amines.  Specified amides are acrylamide and methacrylamide.  The polyamines produced by the process of the invention are useful as chelating agents for Zn, Cu, Ni, Cd and Ag, and they also form Schiff bases with salicylaldehyde.  b -Bromoethylphthalimide is prepared from potassium phthalimide and ethylene dibromide, and is melted and NH3 passed through it to obtain N,N,N-tri(phthalimidoethyl)amine.
Patent GB-1245097-A (GB)
Title: Liquid proportioning and metering pump system
Inventor: COLEMAN CLARENCE BAYER
IPC: B01F15/04
Filed: 1968-08-27
Abstract: 1,245,097. Mixing liquids in proportionate quantities. C. B. COLEMAN. 27 Aug., 1968 [28 Aug., 1967], No. 40936/68. Heading B1C. Liquids are supplied in proportionate quantities by means of metering pumps 30, 32 to a reservoir 16 to form a mixture having a desired ratio of liquids, the ratio being maintained constant by synchronising the pumps, and the rate of supply of the mixture being, at any time, proportional to the difference between a predetermined pressure and the pressure within the reservoir at that time. The metering pumps are provided with control units 40, 42 comprising pneumatically operated double-acting pistons 44, 70 connected to the pistons 47 (only one shown) of the metering pumps. In use, the pressure of compressed air acting on control pistons 44, 70 is set to a value which balances the back pressure of mixture acting on the metering pump pistons 47 when the reservoir is full. When mixture is withdrawn from the reservoir, there is a resultant drop in back pressure acting on pistons 47, which causes the control pistons to be actuated by the compressed air at higher pressure, and consequently causes the metering pumps to start operating. Pump Synchronisation. The metering pumps 30, 32 are synchronised using a conventional air selector unit 80, in association with appropriate control valves 90, 92, 94, 96, to reverse the direction of travel of both control pistons according to the position of control piston 44, and a restrictor 106, which, by reducing the rate at which air is supplied to control piston 44, causes it to follow control piston 70 and ensures that reversal of direction of travel of piston 70 cannot occur until piston 44 has completed its stroke. Ratio Adjustment. The ratio of liquids supplied to the mixture may be adjusted by adjusting the length of stroke of piston 70 by means of bolt and nut assembly 110, 116. Mixing Apparatus. A rotatable and/or reciprocatable agitator having arms 24 and a hollow stem 22 through which one of the liquids to be mixed is distributed may be mounted in reservoir 16. Regulating Discharge of Mixture. The mixture in reservoir 16 may be discharged to a storage tank via a valve controlled by a float-actuated switch associated with the tank, fall of level in the tank actuating the valve to cause mixture to flow from the reservoir 16 into the tank. Alternatively, the float-actuated switch may be arranged to actuate the metering pumps by causing compressed air to be supplied to the control pistons. In an alternative arrangement, Fig. 26 (not shown), a valve in a pipe leading from reservoir 16 to a point of usage is controlled by a differential pressure switch, which is actuated on detection of a pressure drop across an orifice plate in the pipe indicating consumption of the mixture downstream thereof. Alternatively, the differential pressure switch may be arranged to actuate the metering pumps by causing compressed air to be supplied to the control pistons.
Patent GB-1070036-A (GB)
Title: Shuttering for casting concrete
Inventor: DOLPHIN JOHN ROBERT VERNON
IPC: E04G9/06
Filed: 1964-10-08
Abstract: 1,070,036. Shuttering panels for casting concrete. T. I. (GROUP SERVICES) Ltd. Oct. 1, 1965 [Oct. 8. 1964], No. 41009/64. Heading E1S. A shuttering panel comprises a steel plate having flanges 12, 13 welded to and extending laterally beyond two adjacent edges and sockets 17 for scaffolding on its rear face. The flanges are adapted to overlap the unflanged edge of similar plates.
Patent GB-890537-A (GB)
Title: Process for the production of therapeutically active carbonic acid esters
Filed: 1959-12-02
Abstract: Compounds of the general formula <FORM:0890537/IV (b)/1> (wherein n is a number from 9 to 17) are prepared by reacting the free diol with a chlorocarbonic ester of a C10-18 alkanol, or by reacting a 3-chlorocarbonic ester of the diol with a C10-18 alkanol, or by re-esterifying a low-molecular mixed 3-carbonic ester of the diol with a C10-18 alkanol.  The products are useful as therapeutic agents (see Group VI). Specifications 687,047, 701,997 and 803,562 are referred to.ALSO:Pharmaceutical preparations contain a carbonic ester of the general formula <FORM:0890537/VI/1> (wherein n is a number from 9 to 17) distributed in a pharmaceutical carrier as an elixir, granulate or tablet. Specifications 687,047, 701,997 and 803,562 are referred to.
Patent GB-1159173-A (GB)
Title: Improvements in and relating to the Desorption of Foreign Molecules from the Inner Wall Surface of a Receptacle
IPC: H01J9/38
Filed: 1967-09-08
Abstract: 1,159,173. Desorption of receptacles prior to evacuation. BALZERS PATENT-UND BETEILIGUNGS A.G. Sept. 8, 1967 [Oct. 18, 1966], No.41048/67. Heading F1N. A method for the desorption of the foreign molecules from the inside of a receptacle 1 comprises heating the receptacle while supplying thereto an auxiliary gas of low sorbability, e.g. argon, through an inlet valve 16, continuously pumping off the auxiliary gas and desorbed gases by a diffusion pump 3, and adjusting a throttle 5 between the pump and the receptacle so that the pressure in the receptacle is maintained higher than on the suction side of the diffusion pump and such that the flow velocity through the throttle is higher than the velocity at which the molecules of vapour from the pump backstream. The gas pressure maintained in the receptacle is preferably at least ten times higher than that maintained at the suction side of the group. The construction of the apparatus for carrying out the method is identical to that described in Specification 1,122, 875.
Patent GB-1195939-A (GB)
Title: Selector Mechanisms for Change-Speed Gears.
Inventor: STOTT THOMAS CHARLES FELIX
IPC: F16H63/30
Filed: 1968-08-29
Abstract: 1,195,939. Change-speed gear. VAUXHALL MOTORS Ltd. 5 June, 1969 [29 Aug., 1968], No. 41220/68. Heading F2D. In a layshaft type manual C.S.G. in which five forward speeds and one reverse are controlled by a ball-mounted lever 62 having a forked end engaging a cranked arm 64 of a turn- and-slide shift rod 66, striker members 42, 44 and 46, selectively axially movable along a fixed shaft 48 for engagement of 1st-reverse (28, 36), 2nd-3rd (30, 32) and 4th-5th (34, 14) gears respectively, engage via integral lugs 43, 45, 47 with peripheral grooves in an interlock sleeve 72 which is mounted on the shift rod 66 for rotary movement therewith but is prevented from axial movement by a pin (not shown) fast in the gear casing, the shift rod 66 having a blade portion 70, slidable in an axial slot in the sleeve 72, with two spaced recesses corresponding to the peripheral grooves in the sleeve such that the shift rod 66 may be turned to selectively engage the blade 70 with an appropriate striker and then axially move the striker to establish the selected gear. The 1st-reverse striker 42 straddles on end casing wall 74 and as shown includes a sleeve 41 slidable on and supporting the shaft 48 in the wall 74. The 1st gear striker 42 is fast on one end of the sleeve 41 which at its opposite end carries a cantilever arm 74 engaged via a pin-and-slot connection 80, 82 to a lever fulcrumed at one end 86 on the casing and engaging at its free end, via a pin 88, with a reverse-gear cluster 38 which for selection of reverse is movable rightwards for simultaneous engagement with a layshaft 2nd gear 22 and a gear 36 fast on the mainshaft. In the modification of Fig. 5 (not shown), the first and reverse strikers 41, 78 are separately mounted on the shaft 48 and connected by a rod (96) which passes through a clearance hole in the casing wall 74. Inadvertent selection of reverse is prevented by one leg 62 of the forked end of the gear-shift lever 62 which is long enough to limit movement of the shift lever by engagement with the shift rod 66 unless the lever is lifted against a spring bias to raise the leg 62 clear of the rod 66.
Patent GB-1036853-A (GB)
Title: Improvements in or relating to fabric finishing processes
IPC: D06C29/00
Filed: 1963-10-18
Abstract: A fabric is wound with an interleaving cotton material onto a perforated cylinder 4 (Fig. 1, not shown) and then placed in a pressure chamber 3 (Fig. 4, not shown) to receive a steam finishing treatment.  The arrangement is such that steam can be passed to the centre of the fabric roll and forced through the roll to an on to portion of the chamber; steam may alternatively be forced through the fabric in the opposite direction.  In operation the chamber is preheated by high pressure steam being injected into a surrounding chamber 11.  Next steam is passed to the core of the fabric roll or the portion of the chamber surrounding it to cause the air therein, which has become heated, to pass through the fabric and so dehydrate it.  This air is exhausted to the atmosphere, via a cock.  When pure steam issues from the cock it is closed and the pressure of the steam in the chamber raised, e.g. upto two atmospheres above atmospheric. When the steam treatment is finished the roll is returned to the winding apparatus to be unwound.  As this is done air is drawn through to the interior of the roll to cool and dry it.  Before the roll is placed in the steam chamber it may be given a pre-drying, e.g. by flowing hot air through it during winding.  Means whereby the roll is wound, unwound and conveyed to and from the steam chamber are also described.
Patent GB-1408871-A (GB)
Title: Electrical terminal strips
IPC: H01R9/22
Filed: 1971-09-06
Abstract: 1408871 Terminal blocks PLESSEY CO Ltd 4 Sept 1972 [6 Sept 1971] 41388/71 Heading H2E In a terminal assembly, a fanning strip base member 10 and two or more tagblock members 11, (of which only one is shown), capable of being stacked one above another, are secured together by interlocking clips, with means to prevent relative movement between the members. The tagblocks have unitary terminal posts incorporated in an injection. moulded body, which may be of polycarbonate, and may have interlocking clips, each comprising an integral flexible leg 14 and an inwardly directed foot 15, adapted to engage a groove 20 or 16. The tagblock may be locked against relative movements in the plane of the mounting face by means of a longitudinal rib (23), Fig. 2 (not shown), which engages slot 18 in portion 19 of a base member 10, or slot 17 in the mounting face of another tagblock 11. In alternative embodiments the securing means may comprise spigots which snap into mating recesses, or U-shaped spring clips combined with spigots and recesses. A designation strip 13, having a clip 21 and foot 22, may be mounted above the top tagblock in an assembly. The terminals are suitable for wirewrapped connections.
Patent GB-1533123-A (GB)
Title: Microporous sheet having suedelike surface
IPC: C08J9/26
Filed: 1975-10-14
Abstract: 1533123 Synthetic suede-like material MINNESOTA MINING & MFG CO 14 Oct 1975 [15 Oct 1974] 42067/75 Heading B2E A method of making a suede-like polymeric sheet comprises (a) coating a polymer coating composition on to the surface of a substrate, said coating composition comprising a solution of elastomeric polyurethane in solvent, (b) completely covering the polymer coating with a layer of removable particles having an average particle volume of 7 x 10<SP>-8</SP>-6.5 x 10<SP>-5</SP> cm<SP>3</SP>, (c) solidifying the polymer coating and removing the solvent from the coating, (d) removing particles from the polymer coating to provide voids in said coating and (e) drying the resulting suede-like sheet.