baber/WOPTO huggingface dataset:
Patent GB-1038476-A (GB)
Title: Preparation of unsaturated polyesters from alkylene oxides
IPC: C07D213/40
Filed: 1964-06-29
Abstract: Unsaturated polyesters are made by reacting an a ,b -unsaturated dicarboxylic acid or an anhydride thereof with a stoichiometric excess of an alkylene oxide, using as catalyst an organic tin compound of formula SnX2, SnX4, Sn(OOCR)2, SnR12, SnR14, SnR112, SnR114 or SnR12R112, where X is halogen, R1 is alkyl, R11 is alkyl, R11 is a substituted or unsubstituted phenyl radical and R.COOH is an organic carboxylic acid.  Specified unsaturated dicarboxylic acids are maleic and fumaric acids and specified alkylene oxides are ethylene-, propylene-and 1: 2-butylene oxides.  Part of the unsaturated dicarboxylic component may be replaced by a saturated dicarboxylic acid or anhydride, e.g. phthalic, succinic, adipic, glutaric, octenylsuccinic, diglycollic, thio-diglycollic, tetrahydrophthalic or tetrachlorophthalic anhydrides.  When anhydrides are used, reaction may be effected in the presence of an initiator, e.g. water, ethylene glycol, propylene glycol, dipropylene glycol, fumaric acid or adipic acid, or an inhibitor, e.g. hydroquinone. If the polyester is made from a cisunsaturated dicarboxylic acid it may be heated to 200-240 DEG  C. to isomerize the acid to the trans-form.  A small amount of fumaric acid may be added to the polyester before the heat-treatment.
Patent GB-1129646-A (GB)
Title: Linear actuators
Inventor: WHICKER JOHN CHARLES FREDERICK
IPC: F16H25/20
Filed: 1965-06-25
Abstract: 1,129,646. Cam mechanism. ROTAX Ltd. 16 June, 1966 [25 June, 1965], No. 26970/65. Heading F2K. A linear actuator comprises a non-rotatable shaft 11 which is given a stepped axial motion in the direction of the arrow A on rotation of an input shaft 19 by mechanism comprising a first nut 12, a second nut 13, a fixed housing abutment 15 and a movable abutment 14 which is reciprocated axially by rollers 21 engaging a face cam 17. The nuts 12, 13 are interconnected by a spring 23, and abutment 14 is prevented from rotating by means of a splined connection with the housing 10. A cage 21a for rollers 21 is driven from input shaft 19, through a gear 22, at half the speed at which cam 17 is driven from the shaft 19, through a gear 18. A pinion 24, coupled to shaft 19 by a spring 25, meshes a toothed periphery of nut 12. Springs 26 force the movable abutment 14 in the direction of the cam 17. On rotation of input shaft 19, cam 17 is rotated and causes axial movement, in the direction of arrow A, of abutment 14, first nut 12 and output shaft 11. Spring 23 causes nut 13 to screw along the shaft 11 and maintain contact with the fixed abutment 15. On completion of the movement, the load is carried by nut 13, and pinion 24 is rotated by spring 25 to cause rotation of first nut 12 and return it to its original position engaging movable abutment 14, which has been returned to its initial position by the springs 26.
Patent GB-151985-A (GB)
Title: Sound deadening case for typewriters
IPC: B41J29/08
Filed: 1920-09-22
Abstract: 151,985. Fries, R. Oct. 2, 1919, [Convention date]. Sound -deadening cases.-A typewriter is enclosed in a case 1, preferably lined, which is provided with keys 6 resting on the keys of the typewriter, and with hinged or sliding windows 4. The case may he connected to a base 3 by a hinge 2.
Patent GB-789142-A (GB)
Title: Improvements in or relating to telephone systems
Inventor: BECKETT GILBERT JESSOP
IPC: H04Q3/00
Filed: 1955-09-22
Abstract: 789,142. Automatic exchange systems. AUTOMATIC TELEPHONE & ELECTRIC CO., Ltd. Aug. 30, 1956 [Sept. 22, 1955], No. 27040/55. Class 40 (4). In a system in which toll calls are set up under the control of operators over VF junctions, different busy conditions at the terminating exchange, called party busy or all outlets busy at a selector stage, give rise to different non-repetitive VF signals over the junction. As shown, carrier equipment CT terminating a junction J is connected over a 4-wire circuit to an incoming relay set and thence over a hybrid transformer HTS to an incoming selector ITS. VF signals are received by a receiver VFR and are transmitted by a static modulator SM employing rectifier gates. Provision is made for 4-wire switching on transit calls. An end-of-selection signal from the final selector or from a group selector finding all outlets busy is repeated to an allotter ALL and a busy signal discriminator BSD becomes associated with the incoming relay set. One of three conditions may be present on wire EC: (1) continuous earth (called line idle); (2) earth pulses at 120 per minute (called line busy); or (3) earth pulses at 60 per minute (busy condition at a group selector). A relay connected to wire EC for a measured period controls the stepping of a uniselector and the latter in accordance with its setting connects earth to wire NB to initiate ringing or to wire SB or EB to send over the junction a distinctive VF signal which may be reconstituted at the originating exchange to flash the operator's lamp. If the number of incoming junctions is very small the busy signal discriminators may be individual thereto.
Patent GB-503504-A (GB)
Title: Improvements in snap-action electric switches
IPC: H01H13/36
Filed: 1937-10-06
Abstract: 503,504. Snap - action switches. POOLEY, C. A. Oct. 6, 1937, No. 27120. [Class 38 (v)] A snap-action switch has a switch blade member 6 carrying a contact 7 supported in cantilever fashion, and a separate and detachable blade spring 14 held in compression between a groove 15 in a support 12 and a lip 13 at one end of the member 6. The member 6, the support 12 and an operating lever 9 are mounted by means of a screw 10 on a base 8 which also carries two fixed contacts ! 16 and 17, and contact members 11, 18 and 19, which are held in a main base 1 by screws 20 and 21. A casing 2 and cover 3 enclose the switch, which is actuated by a knob 23 pressing on the lever 9 through a rubber sealing diaphragm 26. Pressure is transmitted through a pin 22 to the spring blade member 6 which moves with a snap action in the manner described in Specification 419,917, [Group XXXVII]. A screw adjustment of the support 12 and a stop screw 25 to limit the movement of the blade 6 may be provided. Modifications are described of the U-shaped support 12 and of the substantially triangular or rectangular compression blade 14 with suitable co-operating members 6.
Patent GB-628725-A (GB)
Title: Improved pivotal mounting for derricks
IPC: B66C23/60
Filed: 1947-10-10
Abstract: 628,725. Hinges. ANDERSON, G., and KERR, R. Oct. 10, 1947, No. 27253. [Class 65 (ii)] [Also in Group XXX] A pivotal mounting for a tubular derrick comprises a cut-out plate formed with a projecting eye-piece, the plate fitting into longitudinal slots in the end of the derrick at opposite sides thereof and being welded to the derrick. The derrick 7 is provided with mounting plates 4, 5 formed with eye-pieces 10 and fitting in slots 15 in the derrick, and being welded to the derrick. Plates 18 close the openings between the plates 4, 5 and the derrick, whilst a plate 21 extends between the plates 4, 5. To minimise waste in cutting the mounting plates from a strip of metal, a re-entrant 13 is cut out of each plate when cutting the outline of the eye-piece of an adjacent plate.
Patent GB-653899-A (GB)
Title: Improvements in or relating to vapour electric devices
IPC: H01J13/16
Filed: 1948-10-20
Abstract: 653,899. Discharge apparatus. WESTING- HOUSE ELECTRIC INTERNATIONAL CO. Oct. 20, 1948, No. 27263. Convention date, Oct. 23, 1947. [Class 39 (i)] The anode assembly of a vapour discharge device is rendered shock-proof by using a mechanically-strong insulator and in addition a glass-metal seal around the anode stem. The graphite anode 9 is supported on a stem 8 passing through an aperture 7 in one end 4 of a metal envelope 1 having a cooling jacket 2. Surrounding the anode are three shields 21, 24, 26, the shield 21 having an extension 32 surrounding the stem 8. The mechanicallystrong insulator comprises portions 10, 11, having insulating bodies 12 of e.g. Micalex, with metal inserts 14... 17 moulded therein, the middle inserts 15, 16 being flanged and secured together. The lower insert 14 is welded to the end 4, the upper insert 17 to the end of stem 8, and the insert 15 to the end of the shield extension 32. The upper end of stem 8 is connected by a glass-metal seal 36, 51, 35 to insert 15, and extension 32 by a seal 31, 50, 30 to the end 4. The mercury cathode 6 is received in a cup 5 secured to the other end 3 of the envelope, and the shields 24, 26 are supported by insulators 25. Shield 21 is connected to a source by a connection 28 made to insert 16 and shields 24, 26 by lead-ins 29 in the end 4. The extension 32 acts as an electrostatic screen between the stem 8 and the seal 31, 50, 30.
Patent GB-1224414-A (GB)
Title: Improvements in and relating to teaching aid installations
IPC: G09B7/073
Filed: 1969-05-29
Abstract: 1,224,414. Teaching aids. RICOH K.K. 29 May, 1969 [4 June, 1968; 20 June, 1968], No. 27265/69. Heading G5G. A teaching aid installation includes a D.C. source whose polarity may be reversed (by a teacher) by means of a switch S 2  and which is connected to each of a plurality of switch units (one for each student) S 21 , S 22  &c. Each student's switch unit has either (as shown) two rectifiers a, b and one switch c or (Fig. 3, not shown) two switches and one rectifier. In each case the switch or switches are three-position switches such that the unit can be set to pass D.C. of one polarity or the other or (in a neutral position of the switch in which it is disconnected from the source) neither. When the teacher asks a question, students who give a "YES" answer will light their respective indicators L 21 , L 22  &c. and students who have given a "NO" answer can be identified by the teacher reversing his polarity. Students who have declined to answer can also be identified, since their indicators will not be lit for either polarity of the teacher's switch.
Patent GB-1317819-A (GB)
Title: Cameras with automatic exposure control
IPC: G03B7/083
Filed: 1970-06-05
Abstract: 1317819 Photographic exposure time control ASAHI KOGAKU KOGYO KK 5 June 1970 [7 June 1969] 27375/70 Heading G2A A shutter is closed at the end of an electrically timed exposure by a timing signal received by an electro-magnetic device which includes a magnetic core 35a and an armature 31 one or both comprising a tapering portion terminating in a planar end portion. The invention is described as applied to a roller blind shutter having a leading screen 22 and a lagging screen 23 and which may be operated under manually pre-set mechanical timing or automatic scene illumination control. In the latter event, dial 1 is rotated until scale point 'auto' registers with the index, in which position cam plate 5 engages lever 10 to move lever 11 from engagement with a hook 21. Operation of release initiation lever 27 releases shaft 26 and allows rotation of gears 8, 9 to cause leading screen 9 to run. At the same time a switch 42 having contacts 41, 43 is opened to start exposure timing by an electric control system. At the end of the timed exposure the electro-magnet is de-energized to free armature 31, lever 29 is pivoted out of contact with hook 21, gears 18, 19 then rotate to cause the lagging screen to run down. The gap in the driving connection between the hook 21 and the armature 31 is adjusted, e.g. by a screw 29a, Fig. 4 (not shown), to a minimum to improve accuracy at short exposure times. Movement of lever 11 away from hook 21 upon selecting the 'auto' setting may be arranged to move armature 31 against core 35a, Fig.6 (not shown) with an intermediate excessive force absorbing structure 11a, 11b.
Patent GB-1016465-A (GB)
Title: Method for applying metal layers to dielectric substrates
IPC: H01L49/02
Filed: 1964-07-02
Abstract: A metal coated dielectric substrate, e.g. a wafer thin circuit device, is produced by depositing on the cleaned substrate (e.g. alumina, glass, ceramic and plastics material), over the resistive and conductive areas of the circuit, an electroconductive metallic oxide material containing tin oxide and a suitable binder and filler. The resistive area is coated with an acid resist, the outer layer of uncoated oxide chemically or electrochemically reduced to tin, on to which Cu is deposited and the resist removed. The resist is preferably photosensitive and is applied to the entire area, the pattern being formed photographically.  The oxide may be reduced in a mixture of Zn, Fe, Al, Ni, Co, Cd, Cr or Mn with hydrochloric or fluoboric acid. The Cu is deposited from an electroless plating bath containing KNa tartrate, CuSO4, NaOH, NaCo3 and formaldehyde.  The substrate may be cleaned in an ultrasonically agitated bath of acetone, xylene or trichlorethylene.
Patent GB-1152063-A (GB)
Title: Method and apparatus for Isostatically Pressing Ceramic Ware
IPC: B28B3/00
Filed: 1966-06-20
Abstract: 1,152,063. Isostatic pressure. AMERICAN RADIATOR & STANDARD SANITARY CORP. 20 June, 1966 [21 June, 1965], No. 27384/66. Heading B5A. Thin-walled ceramic ware may be formed by isostatic pressing of a granulated ceramic mixture in a mould having a core to which a membrane is fixed by filling the mould with the ceramic material, evacuating to prevent cracking or bowing of the ware, and pressing the membrane hydraulically against the ceramic. The moulding cavity 50 is formed between a mould part 49 and core 32 having a membrane 38 fixed thereto. The mould part 49 has an opening for filling which is closed by plate 52 movably fixed by spring- loaded bolt 55 to a top plate 54. Air passages 53 run through plates 52, 54 through which air can be evacuated from or supplied to the mould to be exerted on the ceramic ware to assist ejection by movement of plate 52 relative to plate 54. Hydraulic fluid is supplied through passage 37 to space 35 between the core 32 and membrane 38.
Patent GB-323225-A (GB)
Title: Improvements in spindles and parts in connection therewith for use in flyer spinning, doubling, twisting and like machines
IPC: D01H7/40
Filed: 1928-09-25
Abstract: 323,225. Stell, A., and Stell, J. Sept. 25, 1928. Spindle apparatus. - In flyer r spindle apparatus for spinning, twisting, doubling, and like machines of the kind wherein the upper ends of the spindles are carried in antifriction bearings and the lower ends are supported by footsteps, the upper part g' of the support g carries the antifriction bearings and the lower part g<2> accommodates the flange a<2> of the wharl and serves to support the spindles when the footstep rail is removed. The outer race of the bearing is carried in an annular member m which is loosely mounted in the part g<1> but is prevented from rotating by a pin and slot connection n, and the inner race is secured by a cover h. As known, the wharl may be formed in two coupled parts and may be formed with an interior of such dimensions as will allow a free path for the yarn.
Patent GB-753434-A (GB)
Title: Improvements in or relating to photographic material
IPC: G03C1/34
Filed: 1954-09-24
Abstract: 1:4 - Dihydro - 2 - mercapto - 4:4:6 - trimethylpyrimidine - 1 - p - benzoic acid is prepared by heating p-amino-benzoic acid and 2-methyl-2-thiocyano-4-pentanone in water acidified with sulphuric acid.  By using other amino compounds in place of p-amino-benzoic acid other 1-derivatives are obtained.  Thus from m-amino benzoic acid, hydroxylamine hydrochloride, amino-isophthalic acid or methyl hydrazine is obtained respectively the 1-m-benzoic acid, 1-hydroxy, 1-(3:5-dicarboxyphenyl), or 1-methylamino derivatives.  1 - Phenyl - 2 - mercapto - 4 - methyl - 6 - hydroxy - 1:4 - dihydropyrimidine is prepared by shaking b -amino-butyric acid and phenyl isothiocyanate in water containing sodium hydroxide.  1:4 - Dihydro - 2 - mercapto - 4:4:6 - trimethylpyrimidine is prepared by refluxing ammonium thiocyanate and mesityl oxide in toluene and continuously removing the water formed.  Specification 508,073, [Group XX], is referred to.
Patent GB-825192-A (GB)
Title: Vertical single element demulsifier filter assembly
IPC: B01D17/04
Filed: 1957-09-02
Abstract: 825,192. Filters. BENDIX AVIATION CORPORATION. Sept. 2, 1957 [Sept. 7, 1956], No. 27648 /57. Class 46.  Liquid (e.g. hydrocarbon fuel) to be filtered and freed from water is introduced at 18 and passes first through a demulsifier element consisting of a pleated resin-impregnated fibre member 38, an onion bag cloth 36, a batt of fibre glass or nylon 34 and a perforated metal core 32. Water falls through an opening 68 in a mounting plate 66 and is drained automatically from the bottom of the tank 10. The fuel then passes through a resin-impregnated pleated paper member 50 and a perforated core 48, together forming a filter element 30, and is discharged at 24. Fibre glass bands are secured around the pleated members 38 and 50. The element 30 may be replaced by a washer-type edge filter element or a sintered metal element.
Patent GB-749396-A (GB)
Title: Improvements relating to supports for rollers of inking mechanisms of direct or off-set printing machines
IPC: B41F31/30
Filed: 1953-10-08
Abstract: 749,396. Printing-machines. MASCHINEFABRIK WINKLER, FALLERT, & CO. AKT.-GES. Oct. 8, 1953 [Oct. 14, 1952], No. 27749/53. Class 100 (2). Inking-apparatus.-A mounting for an inking roller 8 comprises an axially-movable spindle 5 eccentrically mounted in a bush 1 rotatable in the frame 2, a toothed rack 17 displaceable with the spindle in an axial direction, a manuallyoperated pinion 18 meshing with the rack, and a locking-device for securing the rack and pinion in set position but. releasable so that the pinion 18 can bo rotated to move the spindle 5 axially into or out of roller-supporting position; a lever-like extension 4 on the bush 1 is connected by a link 24 to a ring 26, Fig. 3 (not shown), rotatable manually by toothed gearing to move the roller 8 into or out of engagement with other rollers of the inking mechanism or another roller thereof and the printing forme. An eccentric trunnion 6 on the spindle 5 projects into a ballbearing 7 at the end of the roller 8 and may be adjusted relatively to the bush 1 by means of a ring 10 having a projection 11 engaging a keyway 9 in the spindle 5 and normally clamped to the bush 1 by plates 12 secured by screws 13. The bush 1 may be adjusted relatively to the link 24 by nuts 25, 25a on either side of a pin 22 on the arm 4 through which the link 24 passes. The pinion 18 can be turned by a handle 19 which is normally locked by a projection 20 thereon urged into a notch 20a on the arm 4 by a spring 21. An arm 15 on an extension 16 of the rack 17 engages a circumferential groove 14 in the spindle 5 to cause the rack and spindle to move together axially. In the operative position of the roller 8, the link 24 is in a dead centre position relatively to the ring 26. To insert a fresh roller 8, the link 24 is first operated to move the old roller 8 to inoperative position. The projection 20a is then released and the handle 19 turned to move the rack 17 and with it the spindle 5 until the trunnion 6 leaves the bearing 7. After replacement of the old roller by the new one, these operations are reversed. Proper contact of the new roller 8 with its co-operating rollers is now obtained by simultaneous adjustment of the ring 10 and nuts 25, 25a. A pair of inking-rollers each mounted as described may have their operating links 24 connected to a common ring 26.
Patent GB-856736-A (GB)
Title: Ethylene/propylene copolymers
IPC: C08F2/00
Filed: 1956-12-17
Abstract: Linear high molecular weight unbranched substantially amorphous copolymers of ethylene and propylene are prepared by using a catalyst obtained by contacting a hydrocarbon soluble compound of a metal of Group IVa, Va or VIa with an organo-metallic compound of a metal of Group I or IIa or of aluminium and which if used for polymerizing propylene alone would produce a linear amorphous polymer.  The process details are the same as for Specification 856,733. Specifications 810,023 and 828,791 also are referred to.
Patent GB-805030-A (GB)
Title: Improvements in or relating to jaw crushers
IPC: B02C1/02
Filed: 1957-09-03
Abstract: 805,030. Jaw crushers. BOURNE, R. F., and CHEYNE, D. G. Sept. 3, 1957 [Sept. 5. 1956], No. 27824/57. Class 59 A jaw crusher has both its jaws movable relatively to each other, one jaw being caused, at one end thereof, to describe a substantially circular or elliptical path and at the other end thereof a substantially linear or arcuate path, and the other jaw being subjected to similar motions but at reverse ends. As shown, the upper end of a jaw 1 and the lower end of a jaw 2 are directly coupled respectively to eccentrics 5, 12 mounted on driven shafts 6, 13 while the lower end of the jaw 1 and the upper end of the jaw 2 are respectively constrained by means of links 8, 15 pivotally connected to the jaws and to the crusher casing 3. At least one of the shafts 6, 13 is driven by a prime mover and the shafts are coupled for synchronous movements of the jaws in the same or opposite sense For example, the shafts may be coupled by a gear train 18, 19, 20 or provided with sprockets 21, 22 connected by a chain drive 23: alternatively, the shafts may each be driven by a prime mover and coupled by a crank and connecting rod arrangement One or both shafts may be provided with a flywheel to compensate for shocks. The jaws or the liners 36 thereof may be adjustable towards or away from each other; alternatively, the liners may be replaced by liners of different thicknesses. In a modification, Fig. 2 (not shown), the links instead of being pivoted to the jaws and to the casing are seated in appropriate seatings in the two parts and held in position by means of an adjustable spring- infiuenced hook member. In another modification, Fig. 7 (not shown) the jaws are horizontally disposed.
Patent GB-263978-A (GB)
Title: Means for checking the alignment of the back wheel of a motor cycle or the like
IPC: B62J99/00
Filed: 1925-11-06
Abstract: 263,978. Stevens & Co. (1914), Ltd., A. J., and Stevens H. Nov. 6, 1925. Gauging-apparatus. -An alignment gauge for the back wheel of a motor cycle comprises two parts, (a) a part 4 having a straight referenceedge which part is set by slots and bolts 5, 6 relatively to the centre line of the forked chain stays 2 and secured to a chain stay by a clamp 1, and (b) a second part 7 supplied with the machine when placed in service, so that when the part 7 is placed to engage the gap 8 with the inner surface of the wheel rim, the straight edge part engages the straight edge of the part 4. The setting of the wheel with respect to the centre line of the vehicle may thus be checked at any time.