baber/WOPTO huggingface dataset:
Patent GB-1078418-A (GB)
Title: Novel processes for the preparation of intermediates useful in the preparation of colchicines and the intermediates thus prepared
IPC: C07C255/45
Filed: 1964-12-04
Abstract: Compounds of formula <FORM:1078418/C2/1> wherein X1, X2 and X3 are alkoxy and R is alkyl (optionally aryl-substituted), are prepared by alkylating the corresponding carboxylic acids, e.g. with a diazoalkane.  The preparation of the compound where X1 = X2 = X3 = MeO and R = Me, is exemplified.
Patent GB-1587545-A (GB)
Title: Vibration-damped rotary-percussive hand tool machine
IPC: B25D17/24
Filed: 1977-11-29
Abstract: The powered hand tool, also called a hammer drill, has a percussion mechanism (45) which delivers axial blows to a drilling spindle (51), which transmits these axial blows, if need be together with a rotary movement, to a tool fastened to the drilling spindle. The drilling spindle (51) is guided in an axially movable manner in two rolling bearings (56, 57). Between the rolling bearings it has a collar (58) which reaches into a space defined by two stop shoulders (59, 60). The stop shoulders (59, 60) are formed on bodies (61, 62) which are supported via damping means (63, 64) on the housing of the machine. This dampens in particular the blows arising when the tool or the drilling spindle rebounds onto the powered hand tool. <IMAGE>
Patent GB-1141977-A (GB)
Title: Process for the manufacture of trichloroethylene
IPC: C07C17/25
Filed: 1967-11-01
Abstract: 1,141,977. Trichloroethylene. KNAPSACK A.G. 1 Nov., 1967 [2 Nov., 1966], No. 49722/67. Heading C2C. Trichloroethylene is made by dehydrochlorination of 1,1,2,2-tetrachloroethane, in presence of an alkyl- or aryl-phosphine and/or a hydrochloride or quaternary phosphonium chloride thereof as catalyst, below 200‹ C.; and the resulting trichloroethylene recovered by distillation.
Patent GB-1172118-A (GB)
Title: Electrodynamic Snap-Action Actuators
IPC: H01H53/06
Filed: 1967-11-03
Abstract: 1,172,118. Electromagnetic switches; electromagnets. GES. ZUR FÍRDERUNG DER FORSCHUNG AN DER EIDGENÍSSISCHEN TECHNISCHEN HOCHSCHULE. 3 Nov., 1967 [15 Nov., 1966], No. 50172/67. Headings H1N and H1P. An electromagnetic snap-action mechanism which may be used in a relay, indicator or display device has a bowed blade mounted in a magnet field so that when an electric current is passed through or along the blade it is urged to one of its two extreme positions. In Figs. 1 and 2 the blade 3 is supported at its ends in clamps 2 and passes through the air-gap 6a of permanent magnet system 4. The clamps 2 may be angled (Figs. 3 and 4, not shown) to provide only one stable position. The blade 3 may move, in the latter part of its travel in each direction a respective prong of a fork which actuates contacts or engage a pair of contact pins in one position (Figs. 6 and 7, not shown). The blade may have a polished surface to reflect light in different directions in each extreme position (Fig. 5, not shown). One or both ends or the centre of the blade may act on a rotatable shaft (Figs. 8 to 16, not shown) which may drive ratchet-and-pawl mechanism. One end of the blade may move longutidinally against a biasspring to momentarily operate contacts. In Fig. 19 (not shown), two blades in opposite fields carry turns of a common coil.
Patent GB-1441781-A (GB)
Title: Electric circuit fabrication
IPC: H01L21/027
Filed: 1973-10-29
Abstract: 1441781 Printed circuits INTERNATIONAL BUSINESS MACHINES CORP 29 Oct 1973 [30 Nov 1972] 50287/73 Heading H1R A process for manufacturing a printed circuit board having closely spaced, fine line circuitry comprises depositing on a substrate 2 a metal layer 6, optionally after a metal an interlayer 4 which improves bonding of layer 6, covering the coated substrate with a liquid positive photoresist, allowing the resist layer to dry partially for 15 sees to 45 mins, spinning the assembly to produce uniform resist coating, baking, exposing and developing the resist to produce a desired circuit pattern, electroplating the exposed portions of layer 6 to the thickness of resist layer 8, removing the resist, and etching the non-plated portions of layer 6 and of layer 4 if present. The substrate may be glass, ceramic, a silicon wafer or, for miniature recording heads, magnetic material, e.g. permalloy. Layer 4 may be evaporated Ta, Ti, W, Nb or Cr, and layer 6 evaporated Cu or Au. If the desired circuit pattern is not uniformly distributed on the substrate, "dummy" portions of layer 6 may also be exposed to provide a more even distribution of plating current and these portions are subsequently removed by a masking and etching process. The plated layer may be gold or copper with a surface layer of gold. In the case of magnetic recording heads the plated layer is covered with an insulating layer then a layer of magnetic material. Prior to plating, a second resist coating may be applied, baked, exposed and developed using an identically aligned mask.
Patent GB-1530398-A (GB)
Title: Colour radiographic silver halide processing
IPC: G03C5/16
Filed: 1976-12-02
Abstract: 1530398 Colour radiographic silver halide processing FUJI PHOTO FILM CO Ltd 2 Dec 1976 [5 Dec 1975] 50381/76 Heading G2C A process comprises (A) imagewise exposing to x-rays a silver halide light-sensitive radiographic material containing a coupler of the Formula: where R<SP>1</SP> is a 9-25C monovalent aliphatic or aromatic group; R<SP>2</SP> is a 2-6C divalent aliphatic or aromatic group; and X is H or a coupling-off group, (B) colour developing in an aqueous alkaline solution containing a colour developing agent and (C) fixing, without removing image silver. In the Examples R<SP>2</SP> is (CH 2 ) 2 , X is H, and R<SP>1</SP> is C 9 H 1  9 , C 1  3 H 27  or α-(2, 4-di-pentyl-phenoxy) propyl. Image density is increased allowing the amount of silver halide to be reduced, and good colour x-ray images can be obtained using this process. Reference has been directed by the Comptroller to Specification 1358635.
Patent GB-992784-A (GB)
Title: Binary-to-decimal decoding matrix
IPC: G06F11/32
Filed: 1963-12-20
Abstract: 992,784. Electric selective signalling systems. INSTITUTUL DE FIZICA ATOMICA. Dec. 20, 1963 [Dec. 20, 1962], No. 50470/63. Addition to 955, 329. Drawings to Specification. Heading G4H. [Also in Division H3] The decoding circuit described in the parent Specification is so modified that it places a smaller load on the lower order stages of the counter controlling it that the counter can operate at a high frequency.
Patent GB-1516321-A (GB)
Title: Electrical switch
IPC: H01H25/06
Filed: 1974-11-26
Abstract: 1516321 Mechanical switches; indicators LUCAS ELECTRICAL CO Ltd 13 Nov 1975 [26 Nov 1974] 51105/74 Heading H1N In a switch having an actuator 13, 14 which is rotated to bring the contacts into one operative state and is moved axially to return the contacts to the other operative state an indicator disc 19 is rotated through interengaging parts 22, 23 to one indicating position and moves against resilient means 21 whereby the disc 19 is restored to its initial position when the parts 22, 23 are disengaged by the axial withdrawal of the actuator 13, 14. A spiral grooved cam 15 is keyed to the actuator for operation of a cam follower 16 of the contact carrier 12 and is urged inwards by a compression spring 20. After operation of the contacts by rotation of the actuator the cam follower 16 moves to the portion of the cam of greatest diameter. On withdrawal of the actuator, the follower 16 moves over the cam steps and releases the contacts.
Patent GB-1093325-A (GB)
Title: Photographic developer compositions
Inventor: CONNOLLY LEWIS TIMOTHY
IPC: G03C5/305
Filed: 1964-12-17
Abstract: 1,093,325. Developer compositions, EASTMAN KODAK CO. Dec. 17, 1964 [Dec. 17, 1963], No. 51375/64. Heading G2C. Photographic developer compositions comprise a p-dihydroxy benzene silver halide developing agent e. g. toluhydroquinone, chlorhydroquinone or hydroquinone, an alkali metal sulphite, an alkaline material e.g. alkali metal hydroxides, carbonates and borates and a water-soluble block polymer of polyoxypropylene and polyoxyethylene in which the polyoxypropylene moiety has an average molecular weight of from 750 to 2100, and the polyoxyethylene units constitute from 10% to 60% by weight of the block polymer. Such compositions are used for the infectious develop - ment of lith-type emulsions. The developer may contain an alkali metal bisulphite or the addition product thereof with an aldehyde or ketone such as formaldehyde, acetaldehyde or acetone, alkali metal bromide, boric acid or sodium hexametaphosphate. The block polymer may consist of two or more parts linked by the divalent or polyvalent residue of a polyhydroxy compound, polybasic acid, polyamine, polyamide or polythiol.
Patent GB-1281366-A (GB)
Title: Umbrella
IPC: A45B25/06
Filed: 1969-10-22
Abstract: 1281366 Umbrellas W BAUERMANN & SOHNE GmbH 22 Oct 1969 [22 Oct 1968] 51814/69 Heading A4P An umbrella, which may have a generally rectangular cross-section transverse to the stick axis when collapsed, is provided with a crown 12 having slots 20 to receive respective ends of the spokes, said slots being formed in groups adjacent to each and of the crown and intersected by grooves (21) Fig. 3 (not shown), said grooves being connected by channels 22 formed in the middle of either face of the crown. A wire about which the spokes pivot, indicated by the heavy broken lines, passes along the grooves and channels and through apertures or notches in the ends of the spokes, its ends being secured together in an additional slot 23. Modifications are described, in one of which, Fig. 5 (not shown), the facial channels (25) are formed transversely across the face of the crown so as to connect the two ends of each groove, a separate wire being provided for each group of spokes. In another modification Fig. 6 (not shown), each facial channel (27) extends from one long edge of the crown, passes around the stick and returns to the same edge. In a further modification Fig. 7 (not shown), the facial channels (29) extend from one long edge of the crown to the other, intersecting adjacent to the stick, and the wire takes a figure-eight path. The main and auxiliary slides (13) and (14), which are on a telescopic stick having two sections (10, 11) Fig. 1 (not shown), are similarly constructed. The spokes are telescopic having two sections (15) and (16).
Patent GB-1038310-A (GB)
Title: Improvements in or relating to apparatus for centering and rotating workpieces
IPC: B23G1/22
Filed: 1964-12-22
Abstract: 1,038,310. Machine tool details. COLLINS MACHINERY CORPORATION. Dec. 22, 1964 [June 3, 1964], No. 52038/64. Headings B3B, B3C and B3N. Apparatus for centring and rotating work comprises a set of jaws 36 pivoted about axes spaced from the work-centre and extending nearly to the centre so that they may be moved to grip work of small cross-section. Two sets of jaws are carried by pivot spindles 20 on a carrier 13 rotated by a gear 27 and a motor 26 controlled by a switch 34 and a speed-control 35. The connection between the gear 27 and carrier 13 is by way of links 29 pivoted to links 31 attached to the spindles 20, rotation of the carrier being resisted by friction bands adjusted by a clamp and spring assembly 38. The direction of rotation may be reversed as shown in Fig. 10 (not shown). The threading head 55 is movable by a manual control 57. The end of a pipe is reamed internally by a pointed reamer 50 having two ribs 52, Fig. 13 (not shown), having edges 51 to cut in either direction of rotation of the pipe.
Patent GB-1437512-A (GB)
Title: Rear view mirrors for road vehicles
IPC: B60R1/06
Filed: 1973-11-10
Abstract: 1437512 Rear view mirror assemblies WINGARD Ltd 8 Nov 1974 [10 Nov 1973] 52290/73 Heading B7J A rear view mirror assembly for a road vehicle comprises a mirror 1 held in an elongate backing member 2 of moulded plastics material, a rod 5 fixed to the member 2 to lie parallel to the plane of the mirror and to the longitudinal axis of the member 2, and a housing 8, adapted to be fixed to the vehicle, in which the assembly of the mirror, backing member and rod is mounted such that by manipulation of a portion of the rod which projects out of the housing the assembly can be rotated about the rod axis and also rocked about one end of the assembly, thereby to adjust the setting of the mirror 1. In the illustrated embodiment a flexible peg 10 at one end of the member 2 journalled in a recess at the adjacent end of the housing provides for the above mentioned rotational and rocking movements. The rod 5 is of D- section and has one end located in a blind bore in a rib 4 on the backing member 2 and emerges at its other end through a slot 11 in the housing and a hollow projection 9 of the housing serving for mounting the housing on a vehicle. A spring 12, bearing against the rib 4 and against a washer 13 keyed to the rod and abutting a rubber pad 14 engaging around the slot 11, maintains the peg 10 in its recess.
Patent GB-1188980-A (GB)
Title: Safety Steering Wheel Assembly.
Inventor: BRITTEN PETER GEORGE JEFFRIES
IPC: B62D1/11
Filed: 1967-11-18
Abstract: 1,188,980. Motor vehicle steering wheel assemblies. FORD MOTOR CO. Ltd. 18 Nov., 1967, No. 62544/67. Heading B7J. A motor vehicle steering wheel assembly comprises a collapsible corrugated (or stepped) cylinder 17 which is fixed to a hub 19 splined to a steering shaft 20 and which is welded to a collar 15 welded in the central aperture 13 of a three-spoked pressing 5, the cylinder 17 and the spokes being coated with a single-piece 25 of foamed self-skinning plastics (e.g. polyurethane) applied by moulding, and the rim ring 1 and the outer ends of the spokes being coated with a hard plastics 24 (e.g. cellulose acetate) or a hard rubber.
Patent GB-1106460-A (GB)
Title: Apparatus for varying the phase of an electrical signal
Inventor: MILLAR ROBERT MATHIESON GEMMEL
IPC: H03H11/20
Filed: 1964-12-28
Abstract: 1,106,460. Testing radio navigation apparatus. A. C. COSSOR Ltd. 15 Dec., 1965 [28 Dec., 1964], No. 52570/64. Heading H4D. [Also in Division H2] A variable phase-shifting system comprises a number of phase-shifting circuits, so connected that the output of one circuit is the input of the next, and a " synchro " having two fixed windings fed at different phases and a rotor winding providing a variable phase output. In the Figure a multivibrator 10 and filter 11 produce a sinusoidal voltage at the base of transistor VT1, and voltages in anti-phase are obtained at the emitter and collector and fed to the switches 14a, 14b. Four phase-shifting circuits (transistors VT4, VT5, VT6, VT7) each give a 45 degrees phase shift. Voltages 90 degrees displaced are fed to the primary windings 12, 15 of the " synchro " 13 and a voltage of continuously variable phase is induced in the rotor winding 16. The switch 14 may select this variablephase voltage or any fixed phase between 0 and 360 degrees by 45 degree steps at terminal T1. The phase-shifter is used in a circuit for testing aircraft receivers in VOR direction indicating systems for which a 10 kc/s. signal frequency modulated at 30 c/s. is provided at 18. The apparatus includes the necessary signal generators for VOR and ILS systems as described in Specification 1,106,459.
Patent GB-1389560-A (GB)
Title: Active two-wire to four-wire coupling circuit
IPC: H04M19/00
Filed: 1972-11-16
Abstract: 1389560 Hybrid circuits INTERNATIONAL STANDARD ELECTRIC CORP 16 Nov 1972 [19 Nov 1971] 52882/72 Heading H4R A two wire to four wire hybrid coupling circuit includes an arrangement involving four differential amplifiers in place of the standard hybrid transformer arrangement, the circuit claimed including most of the features shown in the Figure. An incoming unbalanced line n is connected at D to differential operational amplifier Q1 which produces an output voltage V 3 =-Ri, causing an inverting operational amplifier Q2 to produce a voltage - V 3  = Ri. The outputs of the amplifiers Q1, Q2 are coupled via resistors R14, R13 (both of value R/2) and capacitors C1 C2 to a balanced two wire subscriber line AB and cause voltages - Ri/2 and + Ri/2 to be applied thereto. A unity gain operational amplifier Q3 couples signals - Ri/2, + Ri/2 from the wires of the subscriber line AB to a current generating circuit Q4 which causes an output current i to flow in outgoing unbalanced line m irrespective of the value of the load resistance Rds. Reflections from incoming line n to outgoing line m are prevented by a connection from the output E of amplifier Q1 to the non-inverting input of amplifier Q3, which is such that when signals Ri/2 and - Ri/2 are present on wires A, B due to a signal -Ri at E, caused by a current i flowing in the incoming line, the output G of amplifier Q3 is zero. Signals arriving at the points A, B from the subscriber line are not coupled to incoming line n because point E is held at each potential in the absence of a current i flowing in the incoming line n. Such a hybrid circuit may couple a subscriber line to a four wire switching network having MOST'S as crosspoints. The hybrid may be produced in integrated circuit form. The value of R may be 600 ohms which is equal to the nominal impedance Rd of the balanced line. R<SP>1</SP> is for example 10 kohms. Specifications 1,199,119, 1,287,374 and 1,389,559 are referred to.
Patent GB-1122989-A (GB)
Title: Improvements in or relating to telephone systems
Inventor: LUTAS PETER REGINALD
IPC: H04M9/10
Filed: 1964-12-31
Abstract: 1,122,989. Loud-speaking telephones. AUTOMATIC TELEPHONE & ELECTRIC CO. Ltd. 14 Feb., 1966 [31 Dec., 1964], No. 52935/64. Headings H4K and H4R. In a loud-speaking telephone the signals in the microphone and loud-speaker amplifier are rectified to produce voltages of opposite polarity which are added and the resulting voltage is applied to a trigger circuit which operates gain controlling circuits in dependence upon whether the resulting signal is greater than a positive threshold value or less than a negative threshold value, to increase the gain of the amplifier carrying the larger signal and at reduce the gain of the other amplifier. Fig. 2 shows a loud-speaking telephone having amplifiers powered from the exchange over lines A and B with a supplementary battery B1. On receipt of a call the loud-speaking facility is brought into operation by closing key KO1 and operating KO2 to connect power from the line to the amplifiers via rectifier bridge MR5- MR8. Signals from microphone MIC1 are applied to the line via transistors T1-T3 and hybrid TR1, in addition the signal at the collector of T2 is applied via an amplifier T8 to rectifiers MR9-MR12 which develop a positive potential to apply to the base of T9 in the Schmitt trigger ST. The collectors of T9 and T10 are connected so that when T9 is cut off, due to a signal in the microphone amplifier, MR1 is cut off, to prevent any shunting effect on the microphone amplifier signal, MR2 is cut off, to remove negative feedback and therefore increase the microphone amplifier gain, MR3 conducts, to shunt the input to the loud-speaker amplifier, and MR4 conducts, to provide negative feedback and reduction of the loud-speaker amplifier gain. Alternatively, a signal incoming to the loudspeaker amplifier LSA is applied from hybrid TR1 to amplifier LSSA via C11. The output from T11 in LSSA is rectified in MR13-MR16 to develop a negative potential which is applied to Schmitt trigger ST to cause T9 to conduct and T10 to cut off so that the conduction condition of rectifiers MR1 to MR4, described above for a signal in the microphone channel, is reversed to reduce the gain of the microphone amplifier MIA and increase the gain of the loud-speaker amplifier LSA. The back-to-back connection of the rectifier bridges MR9-MR12 and MR13-MR16 insures that the predominant signal in the amplifiers operates the Schmitt trigger to increase the gain for the predominant signal and reduce the gain for the other direction of transmission. Should the loud-speaking facility not be required, lifting f the telephone handset operates an additional hook switch contact CS3 to remove power from the amplifiers. Keys KS and KL provide stepped gain control for the loud-speaker amplifier. The remainder of the subscribers' apparatus is conventional.
Patent GB-1470050-A (GB)
Title: Packing of goods
IPC: B60K1/04
Filed: 1974-11-07
Abstract: 1470050 Shopping trolleys METAL BOX Ltd 7 Nov 1974 [14 Nov 1973] 52946/73 Heading B7B A supermarket trolley 20 has an upper deck 31 comprising a plurality of compartments for receiving individual goods and a lower deck 25 for receiving packed goods from a packing machine 10. The lower deck 25 has an open side 26 for receiving a completed pack 19 from an ejection opening 18 of the packing machine 10. The floor of deck 25 comprises a rigid metal plate 27 inclined downwardly from its entry portion 28A and having ribs (29) Fig. 4 (not shown) across its surface to allow the pack 19 to slide smoothly across. The lower deck, except over the entry portion, has a peripheral supporting screen 30, Fig. 1, of a resilient plastics material, or of rubber or canvas sheeting. The upper deck 31 has similar side screens 32 and is divided into two compartments 34, 35. In operation the customer places goods from supermarket shelves and places them in compartments 34, 35 according to their crushability. A locating finger 36 on the trolley engages a microswitch (38), Fig. 3 (not shown) on the machine 10 when it is in the correct position for loading. The cashier then places goods from the compartments into packing shoot 15, the shutter 13 is closed and the machine automatically wraps the goods in a tube of plastics film, finally ejecting the pack by ejector 16 via shoot 17 on to the lower deck 25 of the trolley. When the trolley is moved forward the microswitch opens and immobilizes the machine 10. The trolley frame may be constructed, in known fashion, to allow a series of trollies to nest into one another for storage. In a modification, Fig. 6, a stop bar 60 locates the trolley in its correct position, and is withdrawn from the extended position shown against bias of a spring 62 by actuation of a solenoid 61. Alternatively the bar may be operated by an electric motor, or a fluid-operated actuator, or a manually operated linkage. In operation, when the pack has been ejected the cashier operates button 65 to retract stop bar 60 and a trolley side frame member 70 interrupts a light beam 68 until the trolley is past the stop bar 60 whereupon the beam 68 is restored and photocell 66 thus operated to de-energize solenoid 61 and the bar 60 is once again extended. The bar 60 may operate a microswitch so that the machine can only be operated when the bar is extended. The trolley may carry a mirror 72 set at such an inclination that when the trolley is in its loading position, and only then, a beam of light 73 is reflected on to a photo-cell 71 which is connected in a safety circuit operative to allow the machine 10 to operate.