William Ladd (inventor)

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William Ladd (* 1815 in Deal ; † April 16, 1885 ) was an instrument maker in London.

He came to London at the age of 14 and became an instrument maker on Beak Street, London, on the corner of Regent St. He was a member of the Royal Astronomical Society and the Royal Microscopical Society .

He made a trip through Germany (1863) and bought a telephone from Philipp Reis from Johann Valentin Albert in Frankfurt , with whom he corresponded. In the period 1872–1882 he built his own telephone transmitter.

In 1867 he brought out a dynamo-electric machine, with some improvements over the previous one from Siemens, Samuel Alfred Varley and Henry Wilde . In the same year he was elected a Fellow of the Society.

In 1869 he applied as "Scientific Instrument Maker by Appointment to the Royal Institution of Great Britain" and resided at 11 & 12 Beak Street, Regent Street W., London. He had several stores in London: 11 & 12 Beak St (1873-83), 199 Brompton Rd. (1873-75), 1 Plow Rd., Shoreditch (1879).

In 1878 he led the Wallace - Farmer a system in England.

He was director of the Anglo-American Brush Electric Light Corporation since it was founded (1879), as well as the Electrical Power Storage Company .

His company changes its name to W. Ladd & Co. , which was taken over by Harvey & Peak around 1882 . Ladd died after a long and serious illness.

supporting documents

  1. ↑ http://adsabs.harvard.edu/full/1886MNRAS..46..191 . (WP suppresses the point after ..191)
  2. ↑ harvard.edu ( Memento from March 23, 2014 in the Internet Archive )
  3. ↑ harvard.edu ( Memento from March 23, 2014 in the Internet Archive )

Web links


personal data
SURNAME Ladd, William
BRIEF DESCRIPTION Instrument maker in London
DATE OF BIRTH 1815
PLACE OF BIRTH Deal (kent)
DATE OF DEATH April 16, 1885