18-04-2019, 04:22 AM
(This post was last modified: 18-04-2019, 05:50 AM by Tony Press.)
From the book 'Skinners Union History' by Mike Harvey published by The SU Carburetter Co.-
1925 2M vertical dashpot carburetter in the 'moderm' style introduced with bronze body superseding the Sloper type.
1928 HV new series similar to the 2M but cast in Mazak with a bottom feed float chamber, in a range of sizes.
1930 The top feed float chamber is added.
1930 The OM Carburettor is introduced- a new 1" used in twin and triple installations on sportscars.
1931 The D series of downdraft introduced with a piston spring for the first time.
1937 The H series of carburettors introduced in a range of sizes.
1938 Hydraulic piston damper introduced (not fitted to the T type MG until 1947)
1939 Brass or weighted aluminium piston introduced to replace Mazak (still no spring).
1948 Aluminium suction pistons and piston springs introduced, weighted pistons phased out. Springs have a reduced diameter lower end until 1955. The hydraulic damper rod is increased in wire gauge with two lengths.
1950 Carburetter is given an air breather hole for the dashpot in the front air filter flange and in some the air hole is deleted from damper cap with a vent passage in an angled web on the dashpot. The still brass cap has a knurled edge up to 1955 and if unvented is fitted with a fibre washer.
1954 HD series introduced with diaphragm jet assembly.
1958 HS series introduced (H series phased out in 1960)
1925 2M vertical dashpot carburetter in the 'moderm' style introduced with bronze body superseding the Sloper type.
1928 HV new series similar to the 2M but cast in Mazak with a bottom feed float chamber, in a range of sizes.
1930 The top feed float chamber is added.
1930 The OM Carburettor is introduced- a new 1" used in twin and triple installations on sportscars.
1931 The D series of downdraft introduced with a piston spring for the first time.
1937 The H series of carburettors introduced in a range of sizes.
1938 Hydraulic piston damper introduced (not fitted to the T type MG until 1947)
1939 Brass or weighted aluminium piston introduced to replace Mazak (still no spring).
1948 Aluminium suction pistons and piston springs introduced, weighted pistons phased out. Springs have a reduced diameter lower end until 1955. The hydraulic damper rod is increased in wire gauge with two lengths.
1950 Carburetter is given an air breather hole for the dashpot in the front air filter flange and in some the air hole is deleted from damper cap with a vent passage in an angled web on the dashpot. The still brass cap has a knurled edge up to 1955 and if unvented is fitted with a fibre washer.
1954 HD series introduced with diaphragm jet assembly.
1958 HS series introduced (H series phased out in 1960)