November 17, 1916.

THE COLLIERY GUARDIAN.

947

WARNING

INFRINGEMENT

Magneto Type Safety Lamp Relighting Machines.

Not only is the maker of an article which infringes the Patent Rights
held by someone else liable to penalty, but the user of the article is
also similarly liable for infringement.

We are the pioneers of Safety Lamp Lighting Machines so arranged
that the lamp chamber must be closed before the electric current may
be turned through the lamp.

Amongst many other of Mr. Hailwood’s Patents owned by this
Company we may mention claims 15 and 16 of Mr. E. A. Hailwood’s
Patent No. 28,255 of 1907, which read: —

“ Claim 1 5.—In apparatus for electrically igniting miners’ safety lamps, a generator chamber having
a revolving or semi-revolving, or sliding door, said door carrying an operating handle or the like
for a dynamo or generator, arranged in such a manner that the admission openings or doors in
the generator chamber lamp chamber must be closed before the said handle can be put into
engagement with the generator.”

“Claim 16.—In apparatus for electrically igniting miners* safety lamps underground, a lamp chamber
having a revolving or semi-revolving or sliding door, said door carrying an operating handle or the
like for a dynamo or generator, arranged in such a manner that the admission opening or door in the
lamp chamber must be closed before the said handle can be put into engagement with the generator.”

This master claim is very broad and does effectually prevent others
from offering or using a safety lamp relighting machine of the magneto
type embodying such a definitely claimed principle.

We warn Colliery Owners not to be deceived by claims of people
holding patents for subsidiary details which cannot be put into complete
use other than by first infringing the master claims of the main patent.

Persons infringing our Patent Rights will be sued as the Law
directs.

Remember, damages for infringement may go back to the first day
of the infringement, even though years elapse.

Keep safe, and send your orders and enquiries to England’s Principal
Safety Lamp factory, the holders of all the valuable Patents for Safety
Lamps and apparatus:—

ACKROYD & BEST LTD.,

MORLEY, near LEEDS.

Telephone No.: 86 Morley, Leede.	Telegraphic Address: “LAMPS, MORLEY.”