baber/WOPTO huggingface dataset:
Patent GB-1511319-A (GB)
Title: 2,6-methane-3-benzazocine derivatives and their preparation
IPC: C07D211/70
Filed: 1975-09-15
Abstract: 1511319 2,6 - Methano - 3 - benzazocine derivatives STERLING DRUG Inc 15 Sept 1975 [20 Sept 1974 (2)] 37887/75 Heading C2C The invention comprises compounds of the general formulµ wherein X is -H, -CH 3  or -C 2 H 5 ; Y is -H, -CH 3 , -C 2 H 5 , -C 3 H 7 , allyl or phenyl; Z is -H, -CH 3 , -C 2 H 5  or -OH; Z<SP>1</SP> is -H, -CH 3  or -C 2 H 5 ; R is -H or -CH 3 ; R<SP>1</SP> is -H, -CH 3 , -C 2 H 5 , -C 3 H 7 , iso - C 3 H 7 , -C 4 H 9 , iso-C 4 H 9 , sec-C 4 H 9 , benzyl, cyclopropylmethyl, formyl, acetyl, propionyl, butyryl, iso-butyryl, benzoyl or cyclopropanecarbonyl; Q<SP>1</SP> is -H (but not in Formula II), benzyl, propyl, iso-butyl, neopentyl, allyl, 2-methyl- or 2 - chloro - 2 - propenyl, cis - 3 - chloro- 2 - propenyl, cis- or trans - 3 - chloro - 2 - butenyl, propargyl, cyclopropylmethyl or (2,2- dichlorocyclopropyl)methyl and, for compounds of Formula II only, may also be one of the radicals given below for Q; and Q may be a radical Q<SP>1</SP> (but not -H) or may be formyl, acetyl, propionyl, isobutyryl, piraloyl, acryloyl, 2-methyl-, 2-chloro- or cis-3-chloro-acryloyl, cis- or trans-3-chlorocrotonoyl, propiolyl, cyclopropanecarbonyl or 2,2-dichlorocyclopropanecarbonyl; and acid addition salts thereof, particularly with HCl. The compounds of Formula I wherein R<SP>1</SP> is H, alkyl, benzyl or cyclopropylmethyl are prepared by conventional methods including reduction of Formula II compounds with Fe/HCl, reaction of the 8-acylamine compounds with HCl and reaction of Formula IV compounds with (CH 3 CO) 2 O/HCl; compounds wherein Q is -CH 2 -alkyl &c. may be prepared by reduction with LiAlH 4 /THF of the corresponding Q-CO-alkyl compounds. Formula I compounds where R<SP>1</SP> is acyl, benzoyl, &c. are prepared by reaction of 8-amino compounds with H . COOH, (R<SP>1</SP>CO) 2 O or R<SP>1</SP>COCl. The 8-nitro compounds of Formula II are prepared by ring nitration with HNO 3 ; compounds with Q=H may be converted to other Q-substituted compounds by reaction with an appropriate halide. The compounds of Formula III are prepared by treatment of the 8-methoxy analogues with HCl and are themselves converted to compounds of Formula IV by reaction with HONH 2  . HCl/pyridine. The compounds of Formulµ I-IV have pharmaceutical properties. 1,2,3,4,5,6,7,10 - Octahydro - 8 - methoxy- 6(eq), 11(ax) - dimethyl - 2,6 - methano - 3 - benzazocine is prepared from its 1,2,3,4,5,6- hexahydro analogue by reaction with sodium in liquid ammonia. 1,2 - Dibenzyl - 3,4 - diethyl - 1,2,5,6 - tetrahydropyridine is prepared from its 1,2-dihydro analogue by reaction with NaBH 4 ; it is reacted with (1) HBr/acetic acid and (2) NaOH to provide cis - 6,11 - diethyl - 1,2,3,4,5,6 - hexahydro - 3 - benzyl - 2,6 - methano - 3 - benrazocine (hydrochloride) which in turn is hydrogenated over palladium-on-carbon to yield the 3-unsubstituted 3-benzazocine (hydrochloride).
Patent GB-344539-A (GB)
Title: Improvements in or relating to directional aerial systems
IPC: G01S3/06
Filed: 1929-12-12
Abstract: 344,539. Directive wireless signalling. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. and WOODS, F., Marconi House, Strand, London. Dec. 12, 1929, No. 38160. [Class 40 (v).] The frame windings are enclosed in two metal weatherproof tubes, 5, 6, connected together at the top 7, but insulated from each other at the bottom 9. In order to determine the " sense " as well as the direction of the incoming signals, a metal rod 8, forming with the tubes 5, 6 an " open " aerial extends from the connections 7 through the insulation box 9, and down through the supporting pedestal 1 to a terminal plate 10, to which the frame windings 11 .. 14 are also led. To remove the 180‹ ambiguity the signal " pick-up " from the rod 8, and the screening tubes 5, 6 are fed to the receiver through a suitable switch. For purely directive readings the rod 8 and its associated parts are cut out from the receiver circuit. In a modified arrangement the leads are taken from the pedestal 1 through a metal tube to a screened amplifier, so that the whole equipment is enclosed by metal screening which serves to prevent interference from inductions and other electrical " noise."
Patent GB-327141-A (GB)
Title: Improvements in the manufacture and production of vat dyestuffs containing nitrogen
IPC: C09B3/30
Filed: 1928-12-27
Abstract: 327,141. Johnson, J. Y., (I. G. Farbenindustrie Akt.-Ges.). Dec. 27, 1928. Isodibenzanthrone dyes.-Vat dyes of the isodibenzanthrone series are made by subjecting isodibenzanthrone or its derivatives to the action of hydroxylamine or its salts. The reaction may be effected in the presence of inorganic dissolving or suspending media capable of splitting off water, such as sulphuric, phosphoric or chlorsulphonic acid, and condensing catalysts, for example metals or their compounds, such as iron, copper, and mercury may also be present. Alkylating agents, such as dimethylsulphate and p-toluenesulphonic esters or acylating agents, or halogens or agents which split off halogens may be brought into the reaction either simultaneously or subsequently, if desired. When the action of the hydroxylamine on the initial material is effected in concentrated sulphuric acid, the addition of an alcohol is usually sufficient to effect alkylation. The products may be purified by boiling them with organic solvents, or by way of their oxonium salts, or by treating their pastes with oxidizing agents, such as alkali metal hypochlorites. The products differ from the aminoisodibenzanthrones described in Specification 23052/10 in that they yield dyeings which are unaffected by treatment with hypochlorites. In examples, (1) isodibenzanthrone is treated with hydroxylamine sulphate in concentrated sulphuric acid, preferably with addition of ferrous sulphate; the product dyes cotton in dark blue shades, a product dyeing in more reddish shades being obtained if the condensation is carried out with addition of dimethylsulphate, (2) dibromisodibenzanthrone (made by brominating in nitrobenzene in presence of iodine) is similarly treated to yield a product which dyes cotton in reddish blue shades; a similar dyestuff may be obtained by brominating the product of example 1, (3) dichlorisodibenzanthrone (made by chlorinating in nitrobenzene by means of sulphuryl chloride) is similarly treated; the product dyes in blue shades, and (4) the product of example 1 is heated with benzoyl chloride; the resulting dyestuff dyes in navy blue shades.
Patent GB-363137-A (GB)
Title: Improvements in and relating to hydraulic operating mechanism
IPC: F16D49/16
Filed: 1930-12-19
Abstract: 363,137. Fluid - pressure brakes. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.-(Assignees of Lum, W. 0. ; Schermerhorn Road, Schenectady, New York, U.S.A.) Dec. 19, 1930, No. 38342. Convention date, Dec. 19, 1929. [Class 103 (i).] Hydraulic apparatus for operating brakes, comprises a piston 6 carrying an impeller 5, which is rotated by an electric motor 3 to transfer liquid from above the piston to below the piston. The cylinder may be pivotally mounted at 2a, and the piston is connected to a crosshead 15 having a work' engaging element or eye 16. The piston-rods 13<1> slide in bearings 14 and pass through apertures in the cylinder head 2. On de-energizing the motor, the piston returns with a dashpot effect.
Patent GB-920049-A (GB)
Title: Improvements in or relating to magnetic cores for inductive elements
IPC: B65B9/20
Filed: 1961-10-26
Abstract: 920,049. Inductors. PHILIPS ELECTRICAL INDUSTRIES Ltd. Oct. 26, 1961 [Oct. 29, 1960], No. 38367/61. Class 38 (2). To ensure uniform abutment of two stacks of E- shaped laminations, cut from magnetic strip, and forming the magnetic core of a choke, notches 15, 16 are provided in the unworked edges 13, 14 such that the deepest points 17, 18 are at the same distance from the worked ends of the limbs, which touch in plane 10. The two stacks of laminations are urged together by pressure at the points 17, 18.
Patent GB-1475071-A (GB)
Title: Bumper assemblies for power operated doors
IPC: E05F15/00
Filed: 1974-09-12
Abstract: 1475071 Retractive switches P C HENDERSONLtd 12 Sept 1974 [14 Aug 1973] 38383/73 Heading H1N A bumper-bar safety switch device for controlling the operation of a power-operated door such as a sliding door 10, comprises a switch 19 and actuator 20 mounted by means 15 on the said door 10, and an actuator member 24 for moving the switch actuator 20 being mounted on said means 15 by resilient connecting means 22 and carrying a bumper strip 28, which is substantially rigid and is capable of resilient movement both rearwardly and sideways to cause operation of switch 19. As shown switch 19 is mounted on one limb 18 of an L-shaped bracket 15 whose other limb 16 is fixed to a door 10. Switch 19 is actuated to stop or reverse the drive to door 10 by tilting of a flexibly-mounted actuator 20 which passes through a rubber grommet 26 in actuator member 24. Member 24 is carried on bracket 15 by means of a rubber ring 22 clamped to an extension 21 of limb 18 and to an arm 23 depending from member 24. A part 25 of member 24 carries a tubular bar 28 to actuate switch 19 when its passage to the right is impeded. Another dependent arm 27 prevents actuation of switch 19 if the door is closed by pulling bar 28 to the right. The bar 28 may be mounted by a plurality of switch assemblies 14 (Fig. 1 not shown) depending upon the height of the door, but there are at least two.
Patent GB-384232-A (GB)
Abstract: 384,232. Franking-machines &c. MÍLLER, J. G. C., 5, Fredrik Stangsgate, Oslo, Norway. July 7, 1932, No. 19263. Convention date, July 9, 1931. [Class 100 (ii).] In a machine for printing postal franks or the like, in which the adjustment of the printing-elements according to the value of the frank to be printed sets also a series of teeth for actuating proportionately a counting-device, the mechanism for adjusting the printing- elements is directly connected to that for setting the teeth. The printing-elements 25, 26 are slidable in radial slots in discs 23, 24 secured to nested tubes 5, 6 rotatable on the main driving-shaft 3. The elements 25, 26 are provided with pins 28 projecting into cam slots in discs 30, 31, the shape of the slots being such that the desired element is projected into printing position through apertures in a stereotype plate 34 secured to discs 32, 33, the former of which is secured to the shaft 3. The discs 30, 31 are formed with projections engaging opposite edges of the stereotype 34 so that they are held against rotation relatively to the shaft 3. The opposite ends of the sleeves 5, 6 carry setting-discs 7, 8 provided with handles 19, 20 extending outside the casing of the machine. The discs are formed with cam slots in which engage pins 14 secured to teeth 11, 12 displaceable in radial slots in discs 9, 10. The discs 9, 10 are held against rotation on the shaft 3 by members 18 secured thereto and to discs 16, 17, the former of which is fixed to the shaft. Adjustment of either of the discs 7, 8 results in the setting of the corresponding number of teeth 11, 12 and the corresponding printing-elements 25, 26. The discs 7, 8 and discs 9, 10 are held in their relative adjusted positions by spring-pressed balls engaging one of a series of depressions. The shaft 3 also carries a drum 49 carrying stereotypes 50 for printing advertising matter or the like, the drum being mounted in eccentrically arranged grooves in the discs 17, 33 and being adjustable from outside the casing to enable any of the plates to be brought to printing position. Starting and stopping arrangements.-On rotation of the shaft 3, the teeth 11, 12 actuate counters 40, one of which may be connected to a control device 41. The matter to be printed is fed into an aperture 42 at one side of the casing, over a resiliently-mounted platform 44 and under a pivotally-mounted arm 47 which releases a lock to permit a single rotation of the shaft 3, to rollers 45, 46 which pass it between the printing-elements and an impreseion roller 38 to a discharge aperture 48.
Patent GB-343240-A (GB)
Title: Improvements in or relating to relay apparatus for use in electric supply systems
IPC: H02H3/033
Filed: 1929-12-16
Abstract: 343,240. Switching systems for consuming devices. GRASEBY, R. C., 45, Horseferry Road, London. Dec. 16, 1929, No. 38474. [Class 38 (iv).] Relates to apparatus for controlling the connection of apparatus to a supply in response to variations of current flowing in a separate supply. An arm 7 pivoted at 8 is normally biased by a spring 9 so that a contact 3 on the arm 7 engages a contact 2 to close the circuit of a heating apparatus. At the approach of peak load, an electromagnet behind the panel 1 and in a separate supply such as the street lighting, attracts its armature so that a pin 29 thereon pulls on a bell crank 31 pivoted to the arm 7 at 32 and opens the circuit at 2, 3. At the same time a pinion 33 on the arm 7 is brought into engagement with a gear wheel 26 forming the end of a gear train driven by an induction disc 10 which is energized by the same electromagnet. After a lapse of time sufficient for the peak load to subside, a pin 34 on the pinion 33 moves the lever 31 clear of the pin 29, the heating circuit being this remade at 2, 3. 'The wheel 33, being thereby freed from the train, returns under spring or gravity action to its starting point against a stop 37 on an adjustable setting disc 36. When the street lights are put out, the electromagnet is de-energized and the armature is released so that the pin 29 again engages the lever 31 ready for a further actuation. The spindle 21 forming part of the train is longitudinally movable so as to allow the wheels 26, 33 to mesh properly. An adjustable permanent magnet 16 controls the speed of the disc 10. The electromagnet may, alternatively, operate to close the contacts 2, 3.
Patent GB-1363434-A (GB)
Title: Continous casting machines
IPC: B22D11/20
Filed: 1971-08-17
Abstract: 1363434 Hydrostatic transmission control PENNSYLVANIA ENG CORP 17 Aug 1971 [3 Sept 1970] 38538/71 Heading F2D [Also in Division B3] A hydrostatic transmission for maintaining a predetermined relation between the speed of withdrawal of a continuously cast strand from an oscillated mould 11 and the speed of the mould oscillation comprises fixed displacement motors 45a-48a driving the withdrawal rolls and a similar motor 30 driving the mould 11, the motors being supplied with pressure liquid, from variable displacement pumps 89, 90 whose delivery in each case is determined by the position of an adjustment stem 140 moved axially by one of the rods 132, 133. The rods 132, 133 are moved simultaneously by levers 120, 121 (with fulcra 123, 124) pivoted together on a pin 130 on a rod 94 of a piston 93 and cylinder 87. The engagement of the pumpadjustment rods 132, 133 with the spaced ends of the levers 120, 121 is by way of nuts 134 which are adjusted so that, when the piston 93 is central of its cylinder, the withdrawal speed of the strand should be such as to maintain an optimum melt level in the mould 11 and the speed of the oscillation motor 30 is 10% faster than that of the withdrawal motors 45a-48a. When the operator observes a change in the melt level in the mould 11, he moves a switch 107 to move valve spool 97 in the valve 86 to one side or the other to connect a supply pump 103 to one or other end of the cylinder 87 to raise or lower the piston 93 to depress or lift the pump stems 140 and increase or decrease the supply to the motors, to increase or decrease their speed, still in the relationship determined by the nuts 134 and levers 120, 121. A valve 145 reverses the supply to the roll motors 45a-48a by way of a valve 146 which is operated to direct the input to the pair of motors 45a, 46a or to those 47a, 48a or to both pairs of motors.
Patent GB-819852-A (GB)
Title: Improvements in or relating to new phenthiazine derivatives and processes for their preparation
IPC: C07D279/24
Filed: 1957-12-13
Abstract: The invention comprises compounds of the general formula <FORM:0819852/IV (b)/1> and their acid addition and quaternary ammonium salts (wherein R is a hydrogen atom or an acyl group containing not more than four carbon atoms, R1 is a hydrogen atom or a methyl group, n is 2 or 3 and m is 1, 2 or 3, the individual groups (CnH2nO) being the same or different when m is 2 or 3), and the preparation thereof by: (1) reacting a phenthiazine compound of the general formula <FORM:0819852/IV (b)/2> (wherein X is the acid residue of a reactive ester, e.g. a halogen atom or a sulphuric or sulphonic ester residue) with a piperazine derivative of the general formula <FORM:0819852/IV (b)/3> (2) reacting a phenthiazine compound of the general formula <FORM:0819852/IV (b)/4> with a reactive ester of the general formula X-(CnH2nO)m-R; (3) when R is an acyl group, acylating the corresponding phenthiazine compound in which R is a hydrogen atom.  Acid addition salts which may be prepared are the hydrohalides, nitrates, phosphates, sulphates, citrates, fumarates, maleates, oxalates, tartrates, methanesulphonates and ethane disulphonates.  Quaternary ammonium salts may be prepared from organic halides (e.g. methyl or ethyl bromide, chloride or iodide, or allyl or benzyl bromide or chloride) or other reactive esters.  The compounds of the invention have therapeutic properties.  In Example (1), 3-(3-cyano-10-phenthiazinyl) propyl toluene-p-sulphonate is reacted with 1-(2-hydroxyethyl) piperazine to give 3 - cyano - 10 - [3 - (4 - b  - hydroxyethyl - 1 - piperazinyl) propyl] phenthiazine, isolated as the di-methanesulphonate.  Similarly prepared are 3 - cyano - 10 - [3 - (4 - hydroxyethoxyethyl-1-piperazinyl) propyl] phenthiazine and its dimaleate, 3 - cyano - 10 - [3 - (4 - hydroxy - ethoxyethoxyethyl - 1 - piperazinyl) propyl] phenthiazine and its dimaleate.  In Example (2), the base of (1) is reacted with acetic anhydride to give 3 - cyano - 10 - [3 - (4 - b  - acetoxyethyl-1-piperazinyl propyl] phenthiazine, isolated as the dimaleate.  Similarly prepared is 3-cyano-10 - [3 - (4 - b  - acetoxyethyl - 1 - piperazinyl) - 2-methyl propyl] phenthiazine and its dimaleate.  In Example (3), 3-cyano-10-[3-(4-g -hydroxypropyl-1-piperazinyl) propyl] phenthiazine is made from 3-cyano-10-[3-(1-piperazinyl) propyl] phenthiazine and 3-chloropropanol.  Similarly prepared are 3-cyano-10-[3-(4-b -hydroxyethyl-1 - piperazinyl) - 2 - methylpropyl] phenthiazine and its dimaleate, and 3-cyano-10-[3-(4-hydroxyethoxyethyl - 1 - piperazinyl) - 2 - methyl propyl] phenthiazine. 3-(3-Cyano-10-phenthiazinyl) propyl toluene-p-sulphonate is made by reacting toluene-p-sulphonyl chloride with 3 - cyano - 10 - (3 - hydroxypropyl) phenthiazine, which is made by acid hydrolysis of 3-cyano-10-(3-tetrahydropyranyloxypropyl)phenthiazine, itself made by condensing 3-cyanophenthiazine with 1-tetrahydropyranyloxy-3-chloropropane.
Patent GB-1210896-A (GB)
Title: Control lever assembly for civil engineering machinery
Inventor: FINCH STANLEY GEORGE
IPC: E02F9/20
Filed: 1968-08-16
Abstract: 1,210,896. Machinery guards. PRIESTMAN BROS. Ltd. 6 Aug., 1969 [16 Aug., 1968], No. 39292/68. Heading F2J. A civil engineering machine has an operator's cab in which there is a control lever 10 enclosed within a shroud 11 having an opening through which the operator can move the lever with his hand. The shroud 11 may be of transparent plastics material or may be of sheet metal provided with plastics trimming 12. A console 9 carrying a joystick 10 may be mounted on each side of the operator's seat 5. Preferably each console 9 incorporates a flat padded portion 13 on which the operator may rest his forearm during manipulation of the joysticks 10.
Patent GB-843696-A (GB)
Title: Improvements in or relating to typewriters
IPC: B41J19/02
Filed: 1956-12-27
Abstract: 843,696. Typewriters &c. INTERNATIONAL BUSINESS MACHINES CORPORATION. Dec. 27, 1956 [Dec. 29, 1955], No. 39309/56. Class 100(4) An escapement mechanism for a typewriter carriage has a pawl 36, Fig. 2a, mounted for pivotal movement only about a pin 38 and spring-held in engagement with the rack 30 and a lever 32 which co-operates with trip mechanism 24 to disengage pawls 34, 36 from the rack 30, pawl 34 subsequently disengaging the lever 32 from the pawl 36 to allow the latter, after carriage movement, to re-engage the rack. As a type lever 2, Fig. 1, moves to the printing position, lever 24 is rocked about 26 through linkages 22, 18. The lever 24, Fig. 2a, rocks the lever 32 which lifts the pawl 34 out of engagement with the rack 30. The pawl 36 is also lifted but the pawl 34 disengages first. On disengaging, pawl 34 is spring urged to the right and down into engagement with the next tooth, the end remote from the rack aligning with a lug 33 of the lever 32. The rack now pushes the pawl 34 and the lever 32 to the left as the pawl 36 has also been disengaged from the rack. In moving to the left lever 32 releases pawl 36 to re-engage the rack 30. Back-spacing mechanism. A back-space pawl 60, Fig. 3, moved by linkages 54, 56, 78, 76, Fig. 1, and driven by a well-known roller and cam assembly, moves the rack to the right in Fig. 3. Specification 751,170 is referred to.
Patent GB-1097256-A (GB)
Title: Pipe clamps
Inventor: COLLINS ROY STANLEY
IPC: F16L3/123
Filed: 1964-09-28
Abstract: 1,097,256. Clamps. AMBERHOLT Ltd. Dec. 20, 1965 [Sept. 28, 1964; Oct. 29, 1964], Nos. 39371/64 and 44114/64. Heading E2B. A pipe clamp comprises two parts with interengaging formations and a screw engageable with one part and passing through an opening in the other-part, tightening the screw moves the pipe gripping surfaces towards one another to. grip the pipe and prevents disengagement of the interengaging formations. The two parts comprise a pedestal 14 and a U-shaped member 10. The pedestal has a flanged base 12 with openings for securing to a structure and a depression 15 which together with part of the U-shaped member embraces the pipe. The pedestal and U-shaped member have inclined interengaging surfaces 19, 20. The screw 17 screws into one of the aligned holes in the limbs of the U-shaped member 10 and passes through a hole in the pedestal. In an alternative embodiment, both the U-shaped member and the pedestal have one flange with aligned holes for the screw, the hole in the pedestal being screw threaded. An additional hole in the pedestal flange is provided for securing the clamp to a structure. The interengaging formations are formed on one limb of the U-shaped member and on the pedestal. The pedestal or U-shaped member may be extended in a direction away from the flanges and may be secured to a structure. The clamp parts are made of resilient material which may be nylon. The screw may also be made of nylon.
Patent GB-986349-A (GB)
Title: Cyclic olefine copolymers
IPC: C08F8/00
Filed: 1962-10-18
Abstract: Copolymers claimed in the parent Specification are made by copolymerizing 99 to 50% by weight of ethylene with 1 to 50% by weight of at least one conjugated diene of the formula CH2=CH-CR=CH2 where R is a methyl, ethyl, propyl, n-hexyl, phenyl, alkoxy, or cyclohexyl radical, in the presence of a catalytic amount of a catalyst formed by the reaction of at least one compound of a polyvalent metallic element of atomic number 23 to 29 inclusive, which contains at least one halogen, oxygen, hydrocarbon, or -O- hydrocarbon substituent directly attached to the metal, and a mixture of aluminium compounds of the empirical formula R1aAlXb wherein R1\h is an alkyl or aryl radical, X is a halogen atom, a has a value of 2.5 to 0.5, b has a value of 0.5 to 2.5.  The copolymerization is effected in a liquid organic solvent in which the catalyst is substantially insoluble at a temperature of -30 DEG  to 125 DEG  C. Specified dienes are isoprene 2-ethyl-, 2-propyl-2-n-hexyl, 2-phenyl-, 2-cyclohexyl-, 2-methoxy-, and 2-ethoxy-1,3-butadiene. The polyvalent metal compound may be VoCl3, VCl4, Cu2,Cl2, FeBr3, CrCl3, MnBr2, CoCl3, NiCl2, or VCl2. The solvent may be a hydrocarbon or halogen-substituted hydrocarbon. The exemplified aluminium compounds are methyl aluminium sesqui-chloride, and sesqui-bromide.  Examples are given of the copolymerization of ethylene and isoprene.