IMPROVEMENTS IN THE MEANS EMPLOYED FOR SUPPLYING AIR TO THE FLAME OF A LAMP
Year: 1883

page_text: LETTERS PATENT to Herbert John Allison, of the firm of Allison Brothers,
Patent Agents, of Southampton Buildings, London, for an Invention of
"IMPROVEMENTS IN THE MEANS EMPLOYED FOR SUPPLYING AIR TO THE
FLAME OF A LAMP." Communicated to me from abroad by George Haseltine,
N° 247 Broadway, City and State of New York, United States of America,
Counsellor at Law
PROVISIONAL SPECIFICATION left by the said Herbert John Allison at the
Office of the Commissioners of Patents on the 24th October 1883.
HERBERT JOHN ALLISON, of the firm of Allison Brothers, Patent Agents, of
Southampton Buildings, London, "IMPROVEMENTS IN THE MEANS EMPLOYED
FOR SUPPLYING AIR TO THE FLAME OF A LAMP " a communication to me from
abroad by George Haseltine, N° 247 Broadway, City and State of New York,
United States of America, Counsellor at Law
The nature of my invention relates to clock work like mechanism for producing
a current of air through the means of an ordinary fan-wheel, or centrifugal form
of blower to the flanie of a lamp, and the essential portion of my invention consists
in the means I employ for communicating motion to the said fan-wheel or blower.
In order to avoid the noise produced by ordinary toothed wheel, spur, or worm
gearing, as hitherto used in mechanical lamps for the purpose of driving the
fan-wheel, and also to economize in construction, I employ traction or antifriction
gearing.:
This gearing used for communicating motion from the clock work portion of the
machinery to the fan-wheel or blower, may be of different forms. In one form a
disk made of any suitable material rotating upon a horizontal axis, carries a boss
or hub, having a horizontal under surface, said boss or hub being secured upon a
perpendicular spindle made long enough to support and carry with it a fan-wheel
or blower. Both the disk and boss or hub may have for the purpose of increasing
traction several circular surfaces stepping into each other.
When using g
blower in which the shafts of both the disk and hub or pinion that moves the
blower should be placed parallel to each other, a saw tooth shape surface of contact
may be formed on both disk and pinion.
The power may be obtained from either weight or spring. When a spring is
used I employ for the purpose of equalizing its force, a fusée and suitable cord or
chain, as used in clock or watch moveinents.
:
1

page_text: The traction or friction between the disk i and disk or hub m may be increased
by forming upon each, one or more corresponding ridges or grooves i¹, i³, which
mesh into each other as shown in the drawing. The frictional or contact surface of
the disks is thus increased and a constant motion of the fan-wheel secured without
the noise consequent on gearing heretofore used for this purpose.
The use of the fusee equalizes the force of the spring and a reliable and a
uniform speed is secured for the fan-wheel b which provides a steady and uniform
current of air to the flame which is essential to secure the best results in this class
of lamps.
Having thus fully described said improvements and shown how the same may be
advantageously carried into practice, I claim as my invention :-
First. The fusee e for equalizing the speed of rotation of the fan-wheel of a lamp
substantially as herein set forth.
Second. The traction disk in combination with the disk or hub m for tho
purpose and substantially as herein set forth.
Third. The construction and combination of operating parts of a lamp substan-
tially as berein set forth.
In witness whereof, I, the said Herbert John Allison, have hereunto set my
hand and seal, this twenty-third day of April, in the year of our Lord one
thousand eight hundred and eighty-four.
HERREDT T ALLISON
BEDDEDT I ATLISON