Grace's Guide

British Industrial History

Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,095 pages of information and 233,633 images on early companies, their products and the people who designed and built them.

Lahmeyer Electrical Co

From Graces Guide

Revision as of 13:50, 20 February 2021 by JohnD (talk | contribs)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to: navigation, search
Lanhmeyer flywheel alternators and Sulzer steam engines at Ferndale Collieries. Photo from 'The South Wales Coal Annual' for 1908, via
This photograph, found between the pages of a book, is unidentified, but clearly shows one of the Lahmeyer alternators at Ferndale Colliery . Ironically, the book was about steam turbines, which would spell the end of large reciprocating steam engines and their flywheel alternators

109/111 New Oxford Street, London

Presumably the UK agents for Lahmeyer & Co. of Germany (established 1890).

Later taken over by AEG.

Electric railway and tramway bonds, both solid and flexible.

Electric motors and generators of all sizes.

Methods of measuring current, voltage, and energy in high tension installations.

Supplied electrical equipment to David Davies and Sons (sic) Ltd for their Ferndale Collieries. This included three Sulzer Bros cross-compound 2500 HP engines driving Lahmeyer flywheel generators working at 2200 volts, 25 Hz, 3-phase. See photographs. The identy on the alternators was presumably intended to give the impression that they were made in the UK. Lahmeyer also supplied, for the No. 9 Pit, the first electric winding machinery to be operated in the South Wales Coalfield. It worked on the Ilgner System, with a 16-feet parallel drum coupled to two direct current motors mounted on either side, each giving a maximum output of 1,250 HP. The DC current for driving the winder motors came from a large Ilgner Motor Generator, consisting of a three-phase 2,200 volt motor (750 HP) driven direct from the power station supply. A DC generator supplied the winding motors, and there was a large cast steel flywheel, weighing approximately 30 tons, coupled on the same shaft, to supply the necessary power to the DC Generator in excess of that supplied by the three-phase motor in order to generate sufficient power for the winder-motors during the early part of the wind, when the load was very heavy. The flywheel had a maximum speed of 500 rpm, and had the effect of equalizing the load taken from the power station. The flywheel was 13 feet diameter, and 3 feet wide on the rim.[1]

See Also


Sources of Information

  1. [1] The South Wales Coal Annual for 1908, via