IN ELECTRIC LAMPS,
Year: 1882

page_text: PROVISIONAL SPECIFICATION left by the said Frederick Mori at the Office
of the Commissioners of Patents on the 10th August 1882.
FREDERICK MORI of Leeds in the County of York Electrician
IN ELECTRIC LAMPS,
"IMPROVEMENTS
This Invention relates to "arc" lamps in which a series of pairs of carbons are
employed and my improvements have reference to the apparatus for commuting
the current from one pair of carbons to the next.
The "switch" for this purpose is actuated by a spring placed in a box under
the bed plate and travels in a circle from one pair to the next as it is released
by a series of cams and spindles which are put into operation by the consumption
of the carbons.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Frederick Mori in the Great Seal Patent Office on the 10th February
1883.
FREDERICK MORI of Leeds in the County of York Electrician,
IN ELECTRIC LAMPS"
"IMPROVEMENTS
This Invention relates to "are" Lamps in which a series of pairs of carbons are
employed, and my improvements have reference to the apparatus for commuting
the current from one pair of carbons to the next.
The "switch" for this purpose is actuated by a spring placed in a box under the
bed plate and travels in a circle from one pair to the next as it is released by a
series of cams and spindles which are put into operation by the consumption of the
carbons.
In order that my Invention may be more fully understood I herein give reference
to the accompanying Sheet of Drawing illustrative thereof. Fig 1 is a plan view
of the underside of the lamp, and Fig 2 is a sectional elevation thereof. A is the
"switch" or commutator which is mounted on a spindle on the underside of the
bed-plate B. The "switch" is actuated by the spring C in the box or barrel C'.
The current passes through the binding screws D and D¹ one of which is in com-
munication with the central pillar E and the inner series of carbons F, the other
one being in communication with the switch A and directing the current through
the electro magnets G and outer series of carbons H.
In the drawings hereto annexed the "switch" is shewn resting upon the stud F¹
and as soon as the pair of carbons are consumed below the pin K the spindle J will
revolve partially, being actuated by a spiral spring as usual and the cam L will also
revolve; thus permitting the switch to pass on and transmit the current through the
shed f. In former lamps of this description the commutator has been placed on the
upper surface of the bed plate and it has been found that the dust deposited by the
carbons has acted as a transmitter of electricity and interfered with the action of
the lamp. By my present Invention this is effectually obviated the commutator
being screened by the bed plate A
I claim the construction of lamps for consuming a series of pairs of Carbons in
which the commutator or "switch" is placed on the underside of the plate A and
operated substantially as herein shewn and described.
In witness whereof I the said Frederick Mori have hereunto set my hand
and seal this Eighth day of February in the year, One thousand eight
hundred and eighty three