Pyke and Harris

of 34 New Tothill-street, London

1892 Description of Pyke and Harris 'alternate current dynamo' for 100 lights. 'Mitis metal is used for the main casting, and is found to have a magnetic conductivity equal to 60 per cent, of steel and wrought iron.'

1893 'THE PRODUCTION OF OZONE FOR COMMERCE.
An interesting plant for the production of ozone on a commercial scale, the invention of M E Andreoli. is now in operation (says Engineering) at the works of Messrs Allen and Hanbury, Bethnal-green, E. The apparatus used is electrical, the ozonier consisting of number of serrated strips formed into girds, and separated from each other by plates of glass. On connecting these girds with opposite terminals of a high potential alternating current, a brush discharge takes place to the glass from the points the serrations, and the characteristic smell of ozone is quickly apparent. In practice, where large quantity of ozone required, a number of these plates are arranged together in a suitable case, and the discharge having been established, a current of air is sent through the case, whence it issues in a highly ozonized state. To insure the purity of the air used, it is filtered through a cotton filter, and cooled and dried before it is passed into the ozonizer. The electric current is supplied by a one-horse power alternator working at 100 volts, which has been supplied Messrs Pyke and Harris. The current obtained from this machine is then transformed to 10,000 volts means of Swinburne transformer, this being the potential used in the ozonizer. It is proposed, among other uses for the supply it for ageing wines, beers, and spirits. It is claimed that in a few hours by the use the ozonier raw spirits or new wines may have the same mellowness, flavour, and bouquet imparted to them if they had been kept in the cellar for years. Another suggested employment for the ozonier is the preparation of oils for painting, the same result as to drying properties being obtained as by boiling the oil, but combined with great improvement in its clearness and colour. The oils, in fact, are bleached in the process. A further claim made for the use of ozone is in bleaching paper pulp. In combination with chlorine it is asserted that paper pulp can bleached at from one-half to five-eighths its usual cost.'<ref>Cork Constitution - Friday 11 August 1893<ref>