baber/WOPTO huggingface dataset:
Patent GB-700292-A (GB)
Title: Improvements in or relating to the flameproofing of solid inflammable materials withbrominated alkene phosphate compounds
IPC: D06M13/292
Filed: 1949-11-25
Abstract: Transparent films of synthetic polymers such as cellulose acetate and vinyl type resins are flameproofed by using as a plasticiser in the film-forming liquid a brominated monomeric phosphoric acid compound made by bromination of an alkene phosphate of formula <FORM:0700292/IV(a)/1> where R is an unsaturated radicle of 3-5 C atoms and X is ONH4 or OR.  Brominated triallyl phosphate is mentioned as a particularly suitable compound.  Solutions or emulsions of the brominated monomer are used in flameproofing textiles (see Group VIII) and may contain a vinyl resin binder.  In Examples (3) triallyl phosphate in aqueous emulsion with polyvinyl alcohol and calcium carbonate is treated with bromine in benzene; (4) triallyl phosphate in aqueous emulsion with polyvinyl alcohol is partially brominated by treatment with bromine in benzene; (5) a hexabromo triallyl phosphate is admixed in methyl ethyl ketone with a vinyl resin e.g. a vinyl chloride-vinyl acetate copolymer containing about 80 per cent. of vinyl chloride and in (6) transparent films are made from a composition containing the ingredients of (5).ALSO:Alkene phosphates of formula <FORM:0700292/IV(b)/1> wherein R is an unsaturated aliphatic radicle of 3-5 C atoms and X is O.NH4 or OR are brominated when dissolved in a solvent or dispersed in a non-solvent medium.  Brominated alkene phosphate monomers are obtained.  The products are used in flame-proofing (see Group VIII).  In examples triallyl phosphate is (1) and (5) brominated in benzene, (2) partially brominated to the equivalent of dibromo-triallyl phosphate and (3) and (4) brominated and partially brominated respectively in an aqueous emulsion of polyvinyl alcohol and in (7) diallyl ammonium phosphate is brominated in aqueous solution to give tetra bromo diallyl ammonium phosphate.  Specification 688,372 is referred to.
Patent GB-282721-A (GB)
Title: Process of preparing artificial silk with special mechanical properties
IPC: D02J1/22
Filed: 1927-11-11
Abstract: 282,721. Naamlooze Vennootschap Nederlandsche Kunstzijdefabriek. Dec. 27, 1926, [Convention date]. Cellulose solutions, processes for making filaments from.-To obtain viscose silk showing an increased tensile strength both wet and dry, while employing a normal viscose and a normal coagulation bath at normal temperature, the thread, in the process of spinning, is given an extended travel, at least 50 cms., in the coagulating bath. Thus the thread is passed in an horizontal direction through the bath for a length of 2.5 metres, and is thereupon carried at an angle through the air. The Specification as open to inspection under Sect. 91 (3) (a) includes the use of an extended travel in the coagulation bath in the manufacture of artificial silk. This subject-matter does not appear in the Specification. as accepted.
Patent GB-1481164-A (GB)
Title: Profiling of metals
IPC: B23K7/00
Filed: 1973-06-26
Abstract: 1481164 Automatic control REDPATH DORMAN LONG Ltd 26 June 1974 [26 June 1973] 30298/73 Heading G3N [Also in Division B3]  Apparatus for controlling the simultaneous profiling and bevelling of a plate or large tube by a cutter comprises a programme in which the desired profile and corresponding variable level angle are separately represented, and two corresponding sensors which scan the programme and respectively control the relative movement between the cutter and the plate, and the angle of the cutter. As shown a cutting torch 38 operates at a profiling position 29 on a tube 15 which is rotated by drive rollers 16. Torch assembly 31 is mounted on a carriage 32 which is driven longitudinally with respect to a main carriage 33 by a servomotor 36 and gearing 37 in response to a photo-cell 17 which scans a profile line A on a programme band. Angular movement of the torch about a vertical axis is controlled by a motor 39 and segment gearing 41 in response to a similar cell 24 scanning a level line B. The torch position is adjustable vertically by a handwheel 51. The main carriage 33 is itself driven relative to a support beam 34 by a servomotor 44 and gearing 46 in response to a photo-cell 43 scanning a line 42 on the tube 15, to compensate for axial creep of the tube. The programme band is driven by a drum 14 coupled to the drive of the rollers 16, at a speed governed by the cell 17. The cells 17, 24 are kept in alignment with the lines A, B by being mounted on respective movable carriages (18, 26) Fig. 4 (not shown), driven by servomotors (22, 27) controlled by the cells. The bevel angle may be represented by the spacing between the two lines A, B.
Patent GB-756719-A (GB)
Title: An improved multi-pin electric plug and a method of making same
Inventor: CLARK GEOFFREY WILLIAM
IPC: H01R31/00
Filed: 1954-10-21
Abstract: 756,719. Two-part couplings. ARIEL PRESSINGS, Ltd. Oct. 21, 1954, No. 30366/54. Class 38 (1). A selector plug has different-sized pins 2, 3 interconnected by a bridging member 4. In assembling the plug, tubular portions 5, 6 of the member 4 are passed over the inner ends of the pins until they engage abutments 11 on the pins, whereupon the said ends of the pins and the tubular portions are inserted in bores in a pre-moulded body 1 and the pin ends swaged over shoulders 9 as shown at 10.
Patent GB-1430006-A (GB)
Title: Method of extracting lactams from acidic reaction mixtures
IPC: C07D201/16
Filed: 1973-06-27
Abstract: 1430006 Extracting lactams from acidic reaction mixtures SNIA VISCOSA SOC NAZIONALE INDUSTRIA APPLICAZIONI VISCOSA SpA 27 June 1973 [28 June 1972] 30457/73 Heading C2C Lactams, e.g. caprolactam, are extracted from acidic solutions containing the lactam by contacting the acidic solution with a phenol containing at least one alkyl substituent which contains 3 or more carbon atoms, and has a solubility in water of less than 0À5 g. per 100 g. of water at 25 C., and in sulphuric acid solution containing 508 of sulphuric acid per 50 g. of water has a solubility of less than 0À2 g. per 100 g. of acid solution, at 25 C., the substituent groups of the phenol not hindering the activity of the hydroxy group of the phenol. Exemplified phenols are o-, m- and p-isopropylphenol, osec-butylphenol, o-tert-butylphenol, o-tertamylphenol, o-sec-amylphenol, p-sec-amylphenol, di-sec-amylphenol, di-tert-amylphenol and mixtures thereof.
Patent GB-1181326-A (GB)
Title: Improvements in or relating to Polychloroprene
Inventor: HARGREAVES CHESTER ARTHUR II
IPC: C08F36/16
Filed: 1968-06-26
Abstract: 1,181,326. Trans-1,4-polychloroprene. E. I. DU PONT DE NEMOURS & CO. 26 June, 1968 [27 June, 1967], No. 30529/68. Heading C3P. Head-to-tail trans- 1,4-polychloroprene having a melting-point of at least 80 C. is prepared by irradiating crystalline chloroprene monomer with high energy radiation to a dosage not exceeding 10<SP>7</SP> rads. The polymer formed is fibrous in form and will form strong films and adhesives.
Patent GB-533755-A (GB)
Title: Improvements in and relating to surface condensers
IPC: F28B1/02
Filed: 1939-11-22
Abstract: 533,755. Surface condensers. BRITISH THOMSON-HOUSTON CO. Ltd. Nov 22, 1939, No. 30558. Convention date, Nov. 23, 1938. [Class 64 (iii)] In a water-cooled surface condenser, the water tube banks 13, 14 are arranged within the drum 10 to form a wedge-shaped passage 17 extending between the steam inlet and non-condensable vapour outlets 16 which are located near the water inlet header 11. Baffle-plates 18, 19, 21 are arranged transversely of the tubes, and sloping baffles 24 are arranged beneath the tubes to drain condensate therefrom into the collecting chamber 25. The weight of the tubes is carried mainly by supports 23. ,
Patent GB-1389698-A (GB)
Title: Process for the production of sodium carbonate monohydrate from a sodium hydroxide solution formed in the diaphragm process
IPC: C01D7/07
Filed: 1972-06-30
Abstract: 1389698 Sodium carbonate monohydrate CHEMIEBAU DR A ZIEREN GmbH & CO KG 30 June 1972 [2 July 1971] 30671/72 Addition to 1371404 Heading C1A Na 2 CO 3 .H 2 O is prepared from a NaOH soln., formed in the diaphragm process for the electrolysis of NaCl, by (a) evaporating the soln. down to a NaOH concn. of 45-55% by wt., (b) separating the NaCl ppt., (c) carbonating the cone. NaOH soln. with CO 2 , (d) separating the Na 2 CO 3 , H 2 O ppt. from the mother liquor, (e) recycling part of the mother liquor to the carbonation stage (c) and (f) washing the Na 2 CO 3 .H 2 O ppt. with water. The NaCl cone. in the carbonation stage is preferably 13-20% by wt. 5-8% by wt. of the mother liquor, based on the NaOH soln. charged to the carbonation stage, is not recycled and used for brine preparation. The carbonation may be carried out at 70-110 C. The Na 2 CO 3 .H 2 O may be washed with 5-15% by wt. water, which may also contain soda. The soln. from the washing stage may be recycled to the carbonation stage.
Patent GB-808933-A (GB)
Title: Improvements in or relating to vitreous-to-metal pinch seals
Inventor: POWER ERNEST BENJAMIN
IPC: H01J61/36
Filed: 1956-10-09
Abstract: 808,933. Vitreous to metal seals. GENERAL ELECTRIC CO. Ltd. Sept. 5, 1957 [Oct. 9, 1956], No. 30789/56. Class 36. To form a pinch seal, of the type in which a metal foil is asymmetrically attached to the end of a metal rod and the rod is supported only by the foil before sealing, one of the pinch-forming jaws 6 and 7 is provided with a projection 12 which applies pressure against a portion of the rod away from the foil to restrain the rod from tilting out of the median plane, due to its asymmetrical attachment, when the jaws are closed on to the pinch. The projection 12 may be wedge-shaped, and is provided on the jaw on that side of the rod to which the foil is attached; a recess 10 may be provided in the opposing jaw to accommodate the thickness of the rod. The glass may be quartz or borosilicate, the rod tungsten and the foil molybdenum and a nickel lead wire may be welded to the other end of the foil.
Patent GB-399994-A (GB)
Title: Improvements in or relating to machines for testing wires and the like by bending
IPC: G01N3/32
Filed: 1932-11-01
Abstract: 399,994. Testing physical qualities of materials. BRUNTONS (MUSSELBURGH), Ltd., Wire Mills, and ELVIDGE, G., 12, Craighall Terrace, both in Musselburgh, Midlothian. Nov. 1, 1932, No. 30801. [Class 106 (ii).] Relates to wire-testing machines in which the specimen is gripped between clamping members and extendsthrough a guide which is oscillated in an arcuate path to bend the wire in alternate directions, and consists in providing the guide with a plurality of pivoted supports between which the specimen of wire is disposed. A spindle 13 formed with right and left handed screw threads 14, 15 is journalled in a base 10 and prevented from endwise movement by lock nuts 16 and a nut 17. A sleeve 18 attached to the spindle has dog teeth 23 adapted to be engaged by dog teeth 22 on the boss of a handle 21 loose on the sleeve and adapted to be slid into and out of driving engagement. A pair of blocks 24 slide in the base and are moved to and from the centre of the machine by the screw threads 14, 15. Each block has detachably fixed to it a clamping jaw 27 the centre parts of which are cut away, the block being drilled laterally to receive guides or rollers 31 around which the wires under test are bent. The space between the jaws is normally bridged by locating pegs 32 for the wires. A U-shaped frame 34 is pivotally mounted by screws 35 in lugs 33 upstanding from the base, one of the limbs of the frame 34 being extended to form a crank handle 36 adapted to oscillate through 180‹ determined by abutments 37. An auxiliary crank arm 38 carries a projection 39 which operates a counter 41 through a lever 40. The centre part of the U-shaped frame 34 is drilled to receive a pair of collets 42, 43 secured by a screw 44, the lower part of each being drilled to accommodate closely the wire under test. In use the wires are passed through the collets and between the locating pegs, the handle 21 being moved so that the jaws 27 grip the wires. The handle 36 is then oscillated until the wire breaks, the number of strokes being registered on the counter. In a modified form, the collets are screw-threaded into the frame 34 to permit vertical adjustment, the pivots are vertically adjustable and also the abutments which are engaged by a squared extension of the frame. For use with wires of small diameter a collet is used, Fig. 7, by means of which a predetermined tension may be given to the wire. The latter is inserted into the flanged sleeve 58 and passed through the collet. The spring 61 is then compressed by moving the screw cap 57 until the required tension is indicated on the scale 56. The wire is now clamped by the L-shaped clamp 60 and the cap 57 slacked to allow the tension to come on to the wire.
Patent GB-1065119-A (GB)
Title: Electronically heat sealed foot covering
IPC: A43B1/10
Filed: 1964-08-04
Abstract: 1,065,119. Boots &c. M. WINSON and J. WINSON. Aug. 4, 1964 [July 26, 1963], No. 30870/64. Heading A3B. A foot covering made from thermoplastic sheet material comprises upper and lower portions 2, 3, joined together by a heat seal 11 using a flat die electrode, the lower portion forming at least a part of the side wall of the finished foot covering. In a first embodiment the upper portion 2 is formed from two pieces of thermoplastic sheeting joined along an instep seam 7 and a counter seam (14). A pair of these foot coverings are made together as follows: first two sole blanks 4 are heat sealed to a sheet (20) (Fig. 13, not shown). A double upper assembly is then formed from blanks (30, 31, 32) heat sealed together along the two instep seams 7. This double blank is then heat sealed along seams 11 to the double sole blank and the waste material (41a) is torn away leaving the two assemblies separate. Each assembly is then flattened and the counter seam (14) is heat sealed. The assembly is then returned to its normal shape and a heat seal (9) around the heel is formed and the excess material removed. The foot covering is then turned inside out and is ready for use. If desired the foot covering may be placed on a last and heated to a temperature of about 100F. In a second embodiment (Fig. 3, not shown) a ballerina type slipper is made by a similar method without an instep seam by using a single blank (15) to form the upper. In a third embodiment (Fig. 23, not shown) single upper blank is closed by an instep seam (107) and is heat sealed to a sole blank along a seam (111).
Patent GB-1268909-A (GB)
Title: 3(-4)-aroylpiperidines
Inventor: DUNCAN JR R L
IPC: C07D317/20
Filed: 1969-06-18
Abstract: 1,268,909. Aroyl-piperidines. A. H. ROBINS CO. Inc. 18 June, 1969 [20 June, 1968], No. 30871/69. Heading C2C. Novel compounds of the formula where R denotes acetyl, aryl, carbamoyl, NC 1-8  alkylcarbamoyloxy, carbamoyloxy, aryloxy, aroyl, ethoxy, 4-phenyl-1-piperazinylacetyl, NC 1-8 -alkylcarbamoyl, N,N-di(C 1-8  alkyl)carbamoyl, N-arylthiocarbamoyl, N-arylcarbamoyl, carbethoxy or 2,3-dihydroxypropyl; R<SP>1</SP> denotes H, F, Cl, Br, C 1-8  alkyl, C 1-8  alkoxy or CF 3 ; Y denotes -CH 2 - and n is 0, or 1-4, and acid addition salts thereof, may be obtained by the steps of (1) reacting nipecotic acid or isonipecotic acid with a lower acyl anhydride to form a 1- lower acyl nipecotic or isonipecotic acid, (2) reacting the latter with thionyl halide to form the corresponding acid halide, (3) reacting the product with an aryl compound in the presence of an aluminium trihalide to give a 1-lower acyl- 3- or 4-aroylpiperidine, (4) hydrolysing to form a 3- or 4-aroyl piperidine, (5) reacting the product with an arylalkyl halide, aryloxyalkyl halide, aroylalkyl halide, #-hydroxyalkyl halide, 4- phenyl-1-piperazinyl acetyl chloride, C 1-8  alkyl isocyanate, N,N-di(C 1-8  alkyl) carbamoyl halide, arylisothiocyanate, arylisocyanate, ethyl chloroformate, 2,3-dihydroxypropyl halide, nitrourea, sodium cyanate or 2-bromoethyl ethyl ether; and where an #-hydroxyalkyl halide is used, (6) reacting the 1-(#-hydroxyalkyl)-4-aroylpiperidine with a C 1-8  alkyl isocyanate. 4-Aroylpiperidines may also be obtained by the steps: (1) dehydrating 1-acetyl-4-carbamoylpiperidine to 1-acetyl-4-cyanopiperidine, (2) reacting the product with an arylmagnesium halide to give a 1-acetyl-4-aroylpiperidine, (3) hydrolysing in an acidic medium to give a 4-aroyl-piperidine and reacting the latter as in (5) above. A further preparation of 4-aroyl-piperidines comprises reacting under cyclizing conditions using NaH a γ-[N-(2-haloethyl)-N-substituted]-amino butyrophenone of Formula X Intermediates are prepared by reacting ethanolamine with 2-(p-fluorophenyl)-2-(3-chloropropyl)-1,3-dioxolane to yield 2-(p-fluorophenyl)- 2 - [3 - N - (2 - hydroxyethyl)aminopropyl]- 1,3- dioxolane, reacting this with 2-(o-methoxyphenoxy) ethyl bromide to give p-fluoro-γ[N-2- hydroxyethyl - N - 2 - (o - methoxyphenoxy)- ethyl]-aminobutyrophenone which is acidified with HCl and then reacted with SOCl 2  to form pfluoro - γ - [N - (2 - chloroethyl) - N - (2 - omethoxyphenoxyethyl)amino]butyrophenone hydrochloride. Pharmaceutical compositions useful as tranquillizing agents comprise compounds of Formula I above and a pharmaceutically acceptable carrier, preferably in the form of tablets or soft gelatine capsules.
Patent GB-286766-A (GB)
Title: Improvements in apparatus for heating water and the like
IPC: F22B7/06
Filed: 1926-12-06
Abstract: 286,766. Halliday, T. E. Dec. 6, 1926. Vertical boilers.-A casing a adapted to contain a relatively large body of water is fitted with one or more flues b with spirally-arranged tapered cross water-tubes b<1> as described in Specification 239,040, [Class 64 (i), Heating liquids &c.]. A flue may be surrounded by a spaced-out circulating-jacket having apertures at top and bottom. In the example shown, steam may be generated and drawn off through a coil tube e arranged in one section d of a divided smoke box, a feed-heating coil 9 being mounted in the other section h.
Patent GB-747479-A (GB)
Title: Improvements in or relating to lubricant compositions
Filed: 1952-12-09
Abstract: Lubricating compositions comprise predominantly a polyalkylene glycol oil and (A) a diarylamine or a hydroxyaromatic compound having at least 2 free hydroxyl groups in at least one ring or aromatic nucleus, and (B) a condensation product of a b -hydroxyalkylamine and/or an alkylenediamine, which may be N-alkyl, aryl, alkaryl or aralkyl substituted.  The amines may be of formula <FORM:0747479/III/1> where R is a substituted or unsubstituted phenyl, naphthyl, anthryl or phenanthryl radical; specific compounds mentioned are phenyla - naphthylamine, p - hydroxydiphenylamine, p, p1-di-hydroxy - di-phenylamine, diphenyl - p - phenylenediamine, diphenylamine, phenothiazine, di-b -naphthylamine, p-isopropoxydiphenylamine, di (p-isopropylphenyl) - p - phenylenediamine, di-b -naphthyl - p - phenylenediamine, p, p1-diisooctyldiphenylamine, phenyl - a - anthrylamine and phenyl - a - phenanthrylamine.  Phenols referred to are unsubstituted or nuclear-substituted polyhydric phenols, naphthols and anthrols; specific examples are hydroquinone, t-butylhydroquinone, di-t-butylresorcinol, t-butylcatechol, 1, 2-dihydroxynaphthalene, 1, 4, - dihydroxynaphthalene, 1, 2 - dihydroxy - 4 - phenylbenzene, 5-octyl-1, 4-dihydroxynaphthalene, 1, 3 - dihydroxy - 5 - cetoxybenzene, 1, 2 - dihydroxy - thianthrene, 1, 2 - dihydroxy - 4 - aminonaphthalene and 1, 2-dihydroxy - 4 - isooctylaminobenzene.  The condensation product may be triethanolamine, morpholine, aminoethylmorpholine, triethylenetetramine, triisopropanolamine, aminoethyl - ethanolamine, dipropylenetriamine, tetraethylenepentamine, polyethylenediamines, N1, N5-dioleyltetraethylenepentamine, hydroxy - ethyldiethylenetriamine, N, N-di (aminoethyl)-aniline, N-phenyl - diethanolamine and N1, N5-di (2-ethylhexyl) - tetraethylene - pentamine.  Polyalkylene glycol oils specified are copolymers of 1, 2-propylene oxide and ethylene oxide, polypropylene glycol or 2-ethylhexyl monoether, trimethylene glycol polymer and secondary butyl methyl polypropylene glycol diether; the monoethers of polyalkylene esters are also referred to.  The compositions are compared with those consisting of polypropylene glycol 2-ethylhexyl monoether aminoethyl-morpholine and one of a-naphthol, pentadecyl phenol, 3 - pentadecyl - 4 - aminophenol, 2, 6 - dit - butyl - p - cresol, m - cetoxyphenol, ortho-aminophenol, dodecylaniline and a-naphthylamine.
Patent GB-898892-A (GB)
Title: Fluid-operated valves
Inventor: PRIESE WERNER KLAUS
IPC: F16K31/163
Filed: 1960-09-12
Abstract: 898,892. Valves. HILLS-McCANNA CO. Sept. 12, 1960, No. 31371/60. Class 135. A fluid-operated valve comprises a valve housing 12 defining passages 14, 16 therein, a valve element 20 mounted in the housing for movement between open and closed positions for connecting and disconnecting the passages, a cylinder 46 mounted on the housing, a valve control shaft 32 drivingly connected to the valve member and extending into the cylinder, a pinion 74 mounted on the shaft within the cylinder, a pair of opposed pistons 62 within the cylinder, each of the pistons including a head portion 54 and a skirt portion 66, the skirt portions each having a rack 72 engaging opposite sides of the pinion. The shaft 32, is coupled to the valve element 20, in the form of a spherical closure member, by a tongue 38 engaging in a slot 36 formed in the latter member; the closure member is freely mounted in seats 22, 24 urged by a spring 40 into contact with the inclined surfaces such as 28 of the housing. In operation, pressurised fluid is fed to either of passages 78 or 80 in order to effect opening or closing of the valve member 20, the fluid being controlled by a piston valve actuated by a solenoid. In order that the valve may fail " safe " in the event of a loss of pressurised fluid, compression springs may be arranged to act on the pistons. The valve may also be actuated mechanically via a tang 100.
Patent GB-737805-A (GB)
Title: Improvements in electrical resistance thermometers
Inventor: BOOTH ALEXANDER
IPC: G01K7/34
Filed: 1952-12-11
Abstract: 737,805. Indicators for dynamo-electric machines. METROPOLITAN - VICKERS ELECTRICAL CO., Ltd. Dec. 4, 1953 [Dec. 11, 1952], No. 31423/52. Class 35. [Also in Group XXXVIII] A resistance thermometer element 4 (see Group XXXVIII) is arranged within an insulator strip in a conductor slot of a dynamoelectric machine. The insulator strip 30 is slotted longitudinally at 31, to accommodate the cable 4 and the enlarged cable portion 10 on which the thermometer_element is formed. The cable is covered by further insulating strips 32, 33 secured to strip 30.
Patent GB-1508858-A (GB)
Title: Hardware assembly with attaching means
IPC: E05B65/20
Filed: 1975-07-28
Abstract: 1508858 Clamping articles to panels ATWOOD VACUUM MACHINE CO 28 July 1975 [2 Aug 1974] 31435/75 Heading E2B An article e.g. a latch operating handle assembly 10 is attached to a panel 11 e.g. of a car door by a wedge assembly 40, the article including a rectangular projection 15 inserted through a hole 16 in the panel and having lugs 45 on the projection 15, and a flange 14 for engaging the periphery of the hole; and the wedge assembly including legs 41 joined by a bridge 43, each leg including a flange 46 for engaging the panel and an inclined cam surface 44 for engaging a respective lug 45. The wedge may be fastened by passing a bolt 47 rigidly attached to the projection 15 through a hole 49 of the bridge and securing it with a nut 50. Operation of the handle mechanism: when an outer door handle 13 is pivoted on arm 23 of the handle 13 pulls down an arm 24, which causes an abutment 29 of a lever 26 pivoted to a link 37 to pivot a lever 30 anticlockwise and release a door latch (not shown) via a link 31. A link 33 operated by an inner door handle may likewise pivot the lever 30. To prevent operation of the outer handle 13 releasing the latch, a link 36 is operated by means within the car to pivot an arm 34 clockwise and hence cause link 37 to move the lever 26 and hence remove the abutment 29 from engagement with the lever 30.