From Graces Guide
Amalgamated Carburetters of Holford Works, Perry Barr were makers of carburetters, supplied under the trademark Amal and others. Amal were the major suppliers of carburettors to the British motorcycle industry for a long time; their products were used by large manufacturers such as BSA and AMC.
1927 Public company formed: Amalgamated Carburetters Ltd to bring together 3 manufacturers Brown and Barlow, Amac and C. Binks (1920) Ltd for better utilisation of their resources, headquartered at the Brown and Barlow factory.
1930 Application to amend patent granted to Brown and Barlow
1931 Name changed to Amal Ltd.
1937 Manufacturers of accessories. "Amal" Carburetters, Pumps etc. 
1939 See Aircraft Industry Suppliers
1940 Part of ICI Metals Division.
1943 Amal was moved into new premises due to fire in December 1943.
With the decline of the British motorcycle industry, the demand for AMAL carburetters fell.
1961 Authorised capital of £320,000 and employed 600 persons
1961 Light precision engineers specialising in carburettors and controls for motor cycle industry, bonnet fasteners, dashboard controls, petrol filters and fuel pumps for motor vehicles. Ball and roller joints, flame traps, bunsen burners, gas injectors, jets and non-returns valves for the gas world-wide. 
1968 Member of IMI Group.
1993 Sold to Grosvenor Works of North London - a supplier of fuel system components. Under Grosvenor some of the more popular obsolete ranges were re-manufactured.
The carburettors are still produced by their current owner Burlen Fuel Systems as spares for the classic motorcycle market. The AMAL and AMAC trademarks now cover a range of products including carburettors (principally but not exclusively for motorcycle engines), controls (brake and clutch levers, cables, etc.), fuel lift pumps, gas jets and burner devices as well as gas safety valves.
Sources of Information
- Amal 
- 1937 The Aeroplane Directory of the Aviation and Allied Industries
- The Times 10 April
- The Times 19 May 1956
- 1961 Dun and Bradstreet KBE
- 1961 Guide to Key British Enterprises: Motor, Motor-Cycle and Commercial Vehicle Manufacturers
- The Times 25 February 1963
- The Times 1st January 1964
- The Times 22 September 1965
- The Times 11 June 1965
- The Times 20 May 1968
-  Burlen Fuel Systems Web Site