baber/WOPTO huggingface dataset:
Patent GB-1450910-A (GB)
Title: Stabilised copolyesters
IPC: C08L33/00
Filed: 1973-12-18
Abstract: 1450910 Copolyetheresters EIDUPONTDE NEMOURS & CO 18 Dec 1973 [18 Dec 1972] 58592/73 Heading C3R A stabilized copolyetherester composition comprises a copolyetherester in physical admixture with or having chemically incorporated therein a sufficient amount preferably 0À015- 6-5% wt. of a compound possessing amide linkages which, on hydrolysis, yield a primary amino group and a carboxyl group to enhance the resistance of the copolyetherester to oxidative degradation, the said copolyetherester comprising a multiplicity of recurring long chain ester units of the formula joined head-to-tail through ester linkages to short chain ester units of the formula where G is a divalent radical remaining after the removal of the terminal OH groups from a poly(alkylene oxide) glycol HO-G-OH having a M.Wt. of from 400-6000 and a carbon to oxygen mole ratio of from 2 : 1 to 4À3 : 1, R is a divalent radical remaining after removal of carboxyl groups from a dicarboxylic acid HOOC-R-COOH having a M.Wt. not greater than 300 and D is the divalent radical remaining after removal of OH groups from a diol having a M.Wt. not greater than 250, the amount of the short chain ester units being from 15- 95% wt. of the copolyetherester. The dicarboxylic acids may be aliphatic, cycloaliphatic or aromatic, preferably cyclohexanedicarboxylic acid, adipic acid and the phthalic acids. The amides may be mono-, bis-, or polyamides and may have reactive end groups such as carboxyl, amino, hydroxyl or ester groups. The composition preferably contains up to 5À0% wt. of an antioxidant such as an arylamine, a hindered phenol or an amide-containing phenolic antioxidant. The antioxidant and the amide may be added during or after the preparation of the copolyetherester. Preferred copolyetheresters are prepared from dimethyl terephthalate and optionally dimethyl phthalate or isophthalate, 1,4-butane diol and poly(tetramethylene oxide) glycol or poly(ethyleneoxide)glycol or poly(propyleneoxide)glycol and contain as antioxidant 4,4<SP>1 </SP>- bis - (α,α - dimethylbenzyl)- diphenylamine, 1,3,5 - tris - (3,5 - di - tertbutyl - 4 - hydroxyhydro - cinnamoyl)hexahydro - s - triazine or 1,6 - bis - [3 - (3,5 - ditert - butyl - 4 - hydroxy-phenyl)propionamido]hexane, and as amide-linkage containing compound or copolymer consisting of #-caprolactam and hexamethylene adipamide units, or a terpolymer consisting of hexamethylene sebacamide, hexamethylene adipamide and #-caprolactam units. Another preferred amide is a bis ester amide such as N,N<SP>1</SP>-bis-(5-carboalkoxyvaleroyl)hexamethylene diamine which is preferably introduced during the preparation of the copolyeater and forms part of the polymer backbone. The composition may also include inorganic fillers such as carbon black, silica gel, alumina, clays and chopped fibre glass.
Patent GB-1463300-A (GB)
Title: Polyetherimides
IPC: C08G73/10
Filed: 1973-12-21
Abstract: 1463300 Aromatic polyetherimides GENERAL ELECTRIC CO 21 Dec 1973 [29 Dec 1972] 59357/73 Heading C3R Polyetherimides comprise repeating units and are terminated by groups derived from bis- (etheranhydride) and/or organic diamine. R is X is C y H 2y , -CO- or -S-; m is 0 or 1; y is 1 to 5; R<SP>1</SP> is a C 6-20  hydrocarbon or halohydrocarbon radical, C 2-20  alkylene or cycloalkylene radical, C 2-8  alkylene-terminated polydiorganosiloxane radical or Q is -O-, -CO-, -SO 2 -, -S- or and x is 1 to 5. Such polymers obtained by the method of Specification 1,463,298 are disclaimed except for the specific product of Examples 1 to 4, 7 to 12 and 14 to 16 of this Specification which are disclaimed from Specification 1,463,298. Such products are obtained by reacting an appropriate bisetheranhydride and diamine in an organic solvent, e.g. benzene, toluene, xylene or mono- or di-chlorobenzene, at at least 130‹ C. They may also be prepared via the polyamide acid by reaction in a dipolar aprotic solvent at ambient temperature as illustrated in Examples 5, 6 and 13. Reference is made to Specification 1,393,835 in respect of the dianhydrides and their preparation. Solution of the polymers may be cast to form films. The polymers may also be injection moulded at up to 500‹ C. and may contain fillers, e.g. silica, glass fibres or carbon whiskers.
Patent GB-1428250-A (GB)
Title: Shoppin trolleys
IPC: B62B/
Filed: 1973-12-27
Abstract: 1428250 Shopping trollies H BURCH 27 Dec 1973 [30 Dec 1972] 59759/73 Heading B7B [Also in Division E2] A shopping trolley has an open goods receptacle 2 and a lockable compartment 4, the door 6 of which is closable by the user but is openable only at specific locations by a key or by electronic or magnetic means independent of the user. The door is urged to the open position by a spring 5 and is locked by the engagement of a spring loaded bolt 8, on its interior surface, with a blade 9 within the compartment. The bolt is bevelled at 10 to facilitate manual closing. An electromagnet 11 is operatively associated with the bolt and roller contacts 12 which at specific locations, for example at a cash desk, engage floor mounted electrical conductors (14) (Fig. 3, not shown). Current supplied to the electromagnet from the floor conductors causes withdrawal of the bolt and spring 5 urges the door open. The door may be pivoted about a vertical or horizontal axis.
Patent GB-1412370-A (GB)
Title: Photographic enlargement apparatus
IPC: G03B27/72
Filed: 1973-12-28
Abstract: 1412370 Exposure control FRANKE & HEIDECKE GmbH [trading as ROLLEI-WERKE FRANKE & HEIDECKE] 28 Dec 1973 [14 Feb 1973] 60073/73 Heading G2A A photographic enlarger has an A.C. powered illumination lamp 3 controlled through a lamp power switch 5 by an exposure time-controlling direct current circuit comprising a relay 6 for operating switch 5, a thyristor 7 and a switch 8 which, when closed after lighting of the lamp and set up of the enlarger for an exposure, causes a firing voltage to be applied to the ignition section of the thyristor and the lamp to be extinguished (with discharge of capacitor 11 and charging of capacitor 14). Lamp 3 is then lit for a timed exposure by closing a switch 13 (with discharge of capacitor 14). Capacitors 22 and 23 then charge up for a time dependent on resistors 18, 20 and 21, after which thyristor 7 fires and lamp 3 is extinguished.
Patent GB-1374760-A (GB)
Title: Cavity floor
IPC: E04F15/024
Filed: 1971-11-29
Abstract: 1374760 False floors M A HARVEY 29 Nov 1971 [18 Dec 1970] 60253/70 Heading E1W A false floor comprises square or rectangular panels (not shown) secured or supported at opposite edges on parallel beams 6 held above the sub floor 3 by screw threaded supports 4 which project through apertures 5 in the beams and are fixed to the beams by nuts 8, 10 and washers 7, 9. The panels may be of plywood and may be covered with carpet, plastics, rubber or linoleum adhered to their upper face. The beams 6 may be formed in modular lengths with a tongue at one end engaging a complementary groove in the opposite end of a longitudinally adjacent beam.
Patent GB-609748-A (GB)
Abstract: 609,748. Amplitude limiters. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Feb. 13, 1946, No. 4572. Convention date, April 29, 1944. [Class 40 (iv)] [Also in Group XL (c)] An audio-frequency channel includes an adjustable amplitude-limiter such that both positive and negative peaks are clipped, and means operable when desired for pre-attenuating the lower frequency components to counteract the relatively greater attenuation of the higher frequencies which occurs when the peaks are clipped. The effect is to increase the average depth of permissible modulation when the signal modulates a carrier, and so to increase the signal-to-noise ratio. The circuit shown may be used either with a receiver RR or with a transmitter 64. Input audio signals are applied to the amplifier 8 through a potentiometer P which may be switched into series with a condenser C for pre-attenuating the lower frequencies. Signals are then limited in a pair of triodes 30 acting as a Class A amplifier with grounded grids. The negative peaks are cut-off by the triode 31, 32 and on reversal of phase the remaining peaks are cut-off by the triode 35, 36. Extraneous frequencies introduced by the limiting are removed by a low-pass filter 40.
Patent GB-1285920-A (GB)
Title: Arrhythmia detecting system
Inventor: HORTH THOMAS C
IPC: A61B5/366
Filed: 1969-12-19
Abstract: 1285920 Electromedical apparatus. HEWLETT PACKARD CO 19 Dec 1969 [23 Dec 1968] 62007/69 Heading G1N In apparatus for monitoring and analyzing ECG waveforms, the widths of the QRS portions of the waveform are determined and compared with a stored reference value of the normal QRS width, an indication being given if a QRS portion is too wide and also if a QRS portion is too early. The trend of such abnormal beats, i.e. the number occurring in sequence, may be monitored and alarms operated if the frequency of abnormal beats exceeds a threshold. Spurious signals e.g. due to interference, electromyographic noise, D.C. signals from the electrodes, may be detected and rejected and the apparatus may be connected to a remote recording system. As described, in Figs.1-4 (not shown) which are inter-connected, the rectified derivative of a received ECG waveform is compared with a pre-set threshold level signal which is set by an AGC circuit (37) and when the QRS portion of this waveform exceeds this level an output pulse of width equal to the QRS portion is produced by a pulse-stretching circuit (45), provided the first excursion of the threshold level is at least 15 m. sec. and that any drop below the level between the first and last excursion is no more than 90 m. secs. For the duration of this output pulse an oscillator (47) produces constant frequency pulses which are counted in a counter (49). At the end of a first operating period, i.e. the storage cycle, the count in (49) is transferred to a register (51). Subsequent QRS portions then produce further counts in counter (49) which are each compared with the reference count in (51), an indication on a lamp (61) being given if a QRS portion is too wide. Too early beats are indicated on a lamp (83).
Patent GB-712363-A (GB)
Abstract: 712,363. Sparking plugs. BENDIX AVIATION CORPORATION. April. 28, 1952 [May 7, 1951], No. 10694/52. Class 7(4) In a low-tension sparking plug comprising a tubular insulator 15, Fig. 1, a central electrode 18 in the insulator and having its sparking end terminating short of, or flush with, one end of the insulator, and an outer electrode, such as washers 17, abutting the end face of the insulator in spark-gap relation to electrode 18, whereby the electrodes are bridged by a surface portion of the insulator, it is arranged that the spark is not greater than 0.025 inches; the outer electrode may also be annular. The radio shielded sparking plug shell 10 has a flange 14 at its active end upon which rests the washer 17 of platinum, nickel tantalum or tungsten, the washer having the aluminium oxide insulator 15 held in contact therewith by a tubular copper wedge 16 which also acts as a gas seal and positions the insulator in the shell. The electrode 18 is connected by a molybdenum wire 20 to a terminal 19, the active conical head 22 of the electrode 18 seating in a correspondingly shaped part of the insulator bore; the electrode is made of silver or silver alloy such as coin silver. The silver may be alloyed or sintered with copper, tungsten, molybdenum; an alloy of 90 per cent silver and 10 per cent copper is particularly suitable, the percentages being by weight. The electrode 18 is simultaneously heated and pressed into the insulator. The insulator bore is sealed and the centre electrode assembly is retained therein by dielectric material 24 that surrounds the wire 20, which material comprises a mixture of aluminium oxide and lead oxide or borasilicate glass for example; the seal may be rendered conductive and the wire 20 dispensed with. After assembly the plug is operated at atmospheric pressure or under any pressure or vacuum condition for a short period so that the sparks will deposit small quantities of silver from electrode head 22 on to the surface of the insulator 15 between head 22 and earthed electrode 14, 17; during normal operation carbon which is deposited on the insulator carries the ionizing current originally carried by the silver deposit. The inner end wall of the insulator is provided with a number, for example, four, radial grooves 25 to connect the space between the shell and insulator to the plug exterior. In a modification, the conical electrode head is replaced by a cylindrical one. In another modification, the earthed electrode 14a, Fig. 4, is welded within the shell 10 and the central electrode 22b is the same diameter throughout. The various central and earthed electrode assemblies may be interchanged and the washer dispensed with.
Patent GB-716784-A (GB)
Abstract: 716,784. Automatic exchange systems. STANDARD TELEPHONES & CABLES, Ltd. April 14, 1950 [May 24, 1949], No. 9226/50. Class 40 (4) [Also in Group XXXVIII] Means for selecting among m.n.o... possibles comprises y groups of electric signalresponsive devices, where y equals the number of factors m, n, o, ... , and the groups consist of at least m, n, o, ... devices respectively, a single signal channel connected in parallel to all the devices, means for applying one of m. n. o.... signal elements to the channel, and means for causing each one of the signal elements to operate a combination of devices which consists of one from each group and which is characteristic of that signal element. As described, the signal elements are pulses each occupying one time position in a recurring cycle of m. n. o.... time positions, and the signal responsive. devices are cold cathode tubes. Two groups, each of three tubes, allow selection among nine possibles. The two cycles of potential pulses Q1 Q2, Q3 and P1, P2, P3 respectively (Fig. 2) which are employed are such that each P pulse is in synchronism with a complete cycle of Q pulses, the P pulses characterizing groups of lines or equipments and the Q pulses the lines or equipments of a group, e.g. corresponding to tens and units digits, respectively. Each tube Va, Vb which will fire to a control electrode/cathode voltage of 100V, has its control electrode connected via an individual rectifier Rca or Rcb to the signal channel PW, and also via a resistance Rha or Rhb to one of the terminals B or B\ to which are connected the Q and P pulse sources respectively. The start contacts cx are closed to enable the tubes. Three secondary wires RW UW1, and UW2 are multipled to PW, of which RW is connected via a resistance to a - 50V battery, and UW1, UW2 via rectifiers to wipers sc1, sc2 which may be respectively connected to one of the Q and one of the P sources. During the time unit when the Q and P sources so connected are simultaneously. producing a pulse the potential on the channel PW rises to - 50V and the two tubes, one Va and one Vb, which receive a pulse on their B or B<SP>1</SP> terminals at that instant will fire. The operation of the corresponding anode relays Ra, Rb marks that one of the nine marking wires which corresponds to the line or equipment to be selected. The fired tubes remain fired and the common cathode resistors disable the other tubes.
Patent GB-2023715-A (GB)
Title: Drum pump
IPC: F04B53/16
Filed: 1978-06-23
Abstract: A drum pump having a die-cast cylinder body (10) with an integral externally threaded inlet boss (13) at the bottom for receipt of a suction tube (14), a screw-in top (12) having an integral outlet (20) which detachably receives, by means of a bayonet connection (19), a discharge pipe (21) having a discharge nozzle (22). Different configurations of discharge pipe and nozzle can be used. The boss (13) is suitable for connection to an oil drum outlet. A clack valve (27) controls the inlet to the pump and a clack valve (26) carried by piston (24) controls the outlet. The piston can be reciprocated by handle (39). The piston which has a feather edge (25), cooperates with the internal surface of the cylinder body (10) and the body has a small internal taper from top to bottom. <IMAGE>
Patent GB-2002226-A (GB)
Title: Hair curlers and a method and apparatus for heating hair curlers
IPC: A45D4/16
Filed: 1978-07-13
Abstract: Hair curlers 7 are heated by passing a current of hot air longitudinally through the hair curler body the body being provided with an internal element 8 able to accumulate and conserve heat. The apparatus for heating the curler comprises a case having an opening to which a fan heating means such as a hair dryer 10 may be applied, the interior of the case connecting with hot air outlets 3 each of which is provided with a holding member for a hair curler. When the curlers are mounted on the outlets hot air blown into the casing will pass into the curlers and so heat them. Each curler may include a cover 13 for receiving hot air from within the curler and deflecting it to flow in the reverse direction along the outer wall of the curler. In an alternative apparatus (Figures 4, 5) the curlers are supported in grooves and the heated air is passed through a plurality of curlers in series. <IMAGE>
Patent GB-2019667-A (GB)
Title: Improvements in electrical connectors
IPC: H01R4/24
Filed: 1978-12-12
Abstract: An electrical connector comprises an integrally molded housing having a dead-front base and a pair of side covers 240, 260 pivotally connected to it by web hinges 210, 211. The side covers 240, 260 fold about the web hinges to: (i) force insulated cord conductors 215 into insulation displacement terminals 206 affixed to the housing and thus wire the connector: and (ii) safely enclose the wiring area. The side covers may also be locked to the dead-front base by the engagement of mating portions of the covers and base to prevent relative motion should the web hinges fail. The connector can have male 202 or female contacts or both. <IMAGE>
Patent GB-2044829-A (GB)
Title: Improvements in lintels
IPC: E04C3/02
Filed: 1979-03-23
Abstract: A lintel for a cavity wall includes a first member 1 having a web for spanning the cavity and a pair of vertically spaced substantially horizontal arms 4 and 5 located on opposite sides of the web, a second member 2 of generally inverted T-shape, the upright 9 of the T adjoining the uppermost arm 4 of the first member at or near a position midway between the longitudinal edges of the uppermost arm, one arm 10 of the T-cross member adjoining the web 3 of the first member, and means 13 being provided on the other arm 11 of the T-cross member and on the uppermost arm 4 of the first member for fixing a lath to provide a rear face effective to form a key for rendering material. <IMAGE>
Patent GB-2020117-A (GB)
Title: Demodulator of polyphase voltages interfering with another
IPC: H02M5/32
Filed: 1979-04-27
Abstract: A demodulator applicable to the demodulation of polyphase voltages with n phases interfering with one another and constituting n systems of polyphase voltages amplitude modulated at a frequency  epsilon , to obtain a polyphase output of frequency  epsilon , comprises:   a) n armatures e.g. as shown three, 11, 12, 13 with n phases fed by n systems of polyphase voltages amplitude modulated at a frequency epsilon , b) n rotor elements 21, 22, 23 each comprising magnetic circuits consisting of a low-loss magnetic material and capable of transmitting an alternating magnetic flux without damping, and c) coils 31, 32, 33 associated with the n rotors to produce an n-phase output of frequency  epsilon . In operation the rotors rotate at a speed corresponding to the carrier frequency of the input signals.   <IMAGE>
Patent GB-2032545-A (GB)
Title: Tappet for use in a disc brake
IPC: F16D65/18
Filed: 1979-05-24
Abstract: In use the tappet engages a friction pad assembly and forces it into engagement with the disc of the brake and to prevent the forces which cause relative movement between the head (1) of the tappet and the friction pad assembly (D) damaging the tappet and/or friction pad assembly, the tappet has a tappet head (1) protected by a cover (3), a low friction material (6) acting between the cover (3) and the tappet head (1), and a resilient material member (7) surrounding the tappet head (1). Thus the cover (3) can slide relative to the tappet head (1), the resilient material member (7) biassing the cover to a central position on the tappet head (1). The detrimental braking forces are thus absorbed reducing the possibility of damage. The low friction material e.g. P.T.F.E. may be in the form of a washer (6) or a coating on head (1). <IMAGE>
Patent GB-2025695-A (GB)
Title: Improvements in reed relays
IPC: H01H51/28
Filed: 1979-06-13
Abstract: One of the reed contact units 1, 2, 3 and 4 of a reed relay with a row of contact units inside a coil is replaced by a magnet 6 or 7. This magnet biasses the contact units on each side or, (if an end contact unit is replaced) on one side thereof to the closed position. If contact unit 3 is replaced by a magnet 6 units 2 and 4 are biased closed. If unit 4 is replaced by a magnet 7, unit 3 is biased closed.   <IMAGE>
Patent GB-2051227-A (GB)
Title: Diesel Engines and Their Idling Operation
IPC: F02B3/06
Filed: 1979-06-19
Abstract: To reduce engine noise and roughness when the engine is idling the intake air may be throttled by a valve 10 and the cylinder heater plugs 2 switched-on. The valve 10 and plugs 2 may be controlled automatically in response to an engine speed detector 19, 20, the position of the fuel pump rack 14, an ambient temperature detector 46 and an engine coolant temperature detector 16. The engine speed and pump rack position may be transmitted hydraulically to control the valve and plugs, Fig. 6 (not shown). <IMAGE>
Patent GB-2027778-A (GB)
Title: Removing Rail Clips from a Railway Track
IPC: E01B29/24
Filed: 1979-07-18
Abstract: A trolley runs along a railway track and a member 14 on it strikes railway clips and removes them from rail- securing positions. The clips are of a kind having a first portion substantially parallel to the rail and driven into a projection besides the rail, a second portion bearing downwardly on the rail flange and a third portion, further from the rail than the first portion, bearing downwardly on an unyielding surface. <IMAGE>
Patent GB-2030835-A (GB)
Title: Hydroponic grass growing unit
IPC: A01G31/06
Filed: 1978-10-09
Abstract: A hydroponic grass growing unit comprises an enclosure which accommodates a plurality of horizontal seed bed trays 24 in vertically spaced rows. The floor of the enclosure has a sump 14 containing hydroponic nutrient solution. Solution can be withdrawn from the sump 14 and supplied to a plurality of spray nozzles 23 which produce a spray pattern in a plane parallel to the trays. The spray pattern for each row of trays 24 is provided by a series of nozzles above the row and the nozzles for each row are spaced horizontally and each is angularly directed toward the next adjacent one such that spray patterns from pairs of adjacent nozzles converge to form an interference pattern. <IMAGE>
Patent GB-2038459-A (GB)
Title: Hot water supply system
IPC: F24H1/18
Filed: 1979-09-26
Abstract: A hot water supply system comprising primary and secondary circuits arranged such that water in the secondary circuit is indirectly heated by hot water in the primary circuit. The secondary circuit includes a storage tank 6 for the heated secondary water, while the primary circuit includes a feed and expansion tank 4 for the primary water and contained within the upper regions of said storage tank 6. A vent pipe from the primary circuit discharges via connector 18 into the feed and expansion tank 4 through a flow arrester 22. The flow arrester has an apertured base 34 and a plate-like cover portion 24 located in or above the upper regions of the tank 4 and which provides a splash-back into the flow arrester for water incident on the undersurface of the cover portion 24 whilst at the same time permitting steam to flow out of the upper regions into the tank 4. <IMAGE>