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Steam and Electric Crane Works of Rodley, Leeds.
1840 The output of the firm consisted mainly of guy and derrick cranes, hand operated
1841 Balmforth, Smith and Booth, millwrights of Calverley, Pudsey (near Rodley)
1847 Partnership change. '...the Copartnership subsisting and carried on by us the undersigned, Jeremiah Balmforth, David Smith, and Jeremiah Booth, as Brass and Iron Founders, Engineers, Millwrights, and Crane Manufacturers, at Rodley, in the township of Bramley, in the parish of Leeds, in the county of York, under the firm of Balmforth, Smith, and Co. is this day dissolved, by mutual consent, so far as relates to the said Jeremiah Booth. All debts due to and owing from the said copartnership will be received and paid by the said Jeremiah Balmforth and David Smith, who will continue to carry on the business of the said copartnership as heretofore, the said Jeremiah Booth intending to commence the said business on his own separate account...' Jeremiah Booth started on his own account in adjacent works at Rodley as Joseph Booth and Brothers.
1858 Jeremiah Balmforth died, his share in the business falling to his son William Balmforth, with the consent of David Smith.
1859 January. David Smith died intestate, and his son, Thomas Smith, then 21 years of age, took over the direction of the firm. Documents describe the partners as Brass and Iron Founders.
1860 The sole draughtsman was John Brook and he designed the 3-ton and 5-ton Steam Guy and Derrick Cranes. They were of single cylinder type. Later, Brook evolved a drive for the travelling motion of locomotive cranes, operated by means of a shaft through the centre pillar.
1861 April. Thomas Smith assumed full control of the company.
1860s Smith's widened their range by the inclusion of overhead travelling cranes
1877 Travelling steam Crane. 
1881 employing 70 men and 20 boys.
1887 Fitted a shovel attachment to a 3-ton steam crane to produce the first Smith excavator.
1888 Combined excavator and steam crane. Illustration and details. 
c1900 Sponsored the invention of a Manchester engineer named Jubb who patented a design for a trencher attachment. This was fitted to a 3-ton Smith steam crane, and several of these machines were produced.
1902/1903 The three remaining sons of Thomas Smith entered into partnership, all having been brought up in the business — Frederick Hardcastle Smith, Walter Tom Smith and George Edward Smith 
1914 Manufacturers of electric, steam and hand cranes of all types and powers, cantilever cranes and special cranes for quays, capstans, Goliaths, permanent way cranes, transporters, overhead travellers, single rail cranes, harbour and dock cranes, breakdown cranes, locomotive cranes (electric and steam). Employees 400. 
1918 Private company.
1927 See Aberconway for information on the company and its history
1939 March 28th. Frederick Hardcastle Smith, Walter Tom Smith and George Edward Smith, described in the articles as the "First Directors" and "Life Directors", and who held all the Ordinary Share Capital in the Company, transferred three-fourths of their respective holdings to Thomas W. Ward Albion Works. Sheffield. As a result of this transfer, Thos. W. Ward, Limited, assumed financial control and appointed the following gentlemen as Directors: Joseph Ward, J.P. (Chairman), Frank Rutland Stagg, James Bussey, and Charles Albert Lee..
1947 Employing 860 persons on a 15-acre site
1960 Advert for shovels and draglines for strip-mining. 
1961 Crane and excavator makers. 
Booklets See Thomas Smith and Sons: Booklets.
Notes Mobile crane. Exhibit at Bradford Industrial Museum.