IMPROVEMENTS IN ELECTRIC LAMPS
Year: 1883

page_text: PROVISIONAL SPECIFICATION left by Amos William Richardson at th
Office of the Commissioners of Patents on the 5th September 1883.
AMOS WILLIAM RICHARDSON of Chorlton on
Lancaster, Engineer,
£6
Medlock in the County of
IMPROVEMENTS IN ELECTRIC LAMPS."
My invention relates to electric lamps of the "are" class, and consists in
arrangements by which I am enabled to maintain the carbons or other equivalents
therefor used in such lamps in position for obtaining a light of greater steadiness
and uniformity than has hitherto been practicable.
For this purpose I employ an electro-magnet which by means of an armature
and lever or levers may at times act upon a frame so as to raise it. The frame above
referred to supports a train of wheels and pinions the axle of one of which is provided
with a grooved pulley or roller. Attached to the frame above mentioned is
another grooved pulley or roller between which and the grooved pulley or roller
previously mentioned passes the rod to which one of the carbons or other
equivalents therefor is attached, such rod aforesaid being capable of being
supported at times by the two grooved pulleys or rollers above referred to.
I also employ a second electro-magnet or other equivalent therefor provided
with an armature carried by a lever turning upon a centre attached to the
framework of the lamp, the said lever being provided with an arm which is held
in contact with one of the wheels of the previously mentioned train of wheels
or a wheel connected thereto by means of a spring or other equivalent therefore,
so as to constitute a brake.
The electric current by which the light is produced in the lamp above referred
to passes through the electro-magnet above mentioned, thereby causing such electro-
magnet to move the frame carrying the train of wheels, and the two friction
pulleys or rollers, thereby separating one of the carbons or other equivalents
therefore out of contact with the other. The second electro-magnet or other
equivalent therefore previously referred to is excited by a current of electricity
from the main supply of the lamp aforesaid in such manner that when the two
carbons or other equivalents therefor become separated beyond a certain distance.
an increased quantity of electricity will pass through the coil of the above named
electro-magnet or other equivalent therefor, which will then remove the brake

page_text: aforesaid out of contact with the train of wheels previously mentioned, and the
carbon or other equivalent therefor carried by the rod previously mentioned will
be caused by gravity or by means of a spring to approach the other carbon or
equivalent therefor until the correct distance is attained when the current of
electricity passing through the second electro magnet or other equivalent therefor
will become lessened and the brake previously mentioned will arrest the
movement of the carbon or other equivalent therefor above named. To the axle.
of one of the train of wheels above named I attach wings or vanes so as to
retard the revolution of the said wheels. The other carbon or other equivalent
therefor which is opposite to the one the motion of which is described above, is
supported from the framework of the lamp in any convenient manner.
By the above described arrangement I am enabled to produce an electric
lamp which comes into action immediately upon a current of electricity being
supplied thereto.
The rod referred to above as carrying the carbon or other equivalent therefor,
which rod is grasped by the grooved pulleys or rollers before mentioned I form
in some cases as a smooth rod of circular or other section; or 1 form teeth
thereon in which case I form one or both of the grooved pulleys or rollers above
referred to with teeth to correspond therewith.