IMPROVEMENTS IN GOVERNING OR REGULATING THE SPEED OF MACHINERY DRIVEN BY ANIMAL OR HAND POWER, AND IN THE APPARATUS OR MEANS TO BE EMPLOYED THEREIN."
Year: 1877

page_text: PROVISIONAL SPECIFICATION left by Edwin Powley Alexander at the Office
of the Commissioners of Patents on the 31st July 1877. A communication
from abroad by Ernst Gottlob Klemm, of the Firin of Klemm Brothers,
Eckernförde, in the Empire of Germany, Agricultural Engineers.
EDWIN POWLEY ALEXANDER, of 14, Southampton Buildings, in the County of
Middlesex, Consulting Engineer and Patent Agent. IMPROVEMENTS IN GOVERNING
OR REGULATING THE SPEED OF MACHINERY DRIVEN BY ANIMAL OR HAND POWER,
AND IN THE APPARATUS OR MEANS TO BE EMPLOYED THEREIN." A communication
from abroad by Ernst Gottlob Klemm, of the Firm of Klemm Brothers, Eckernförde,
in the Empire of Germany, Agricultural Engineers.
This Invention has for its object the governing or regulating the speed of
machinery of all kinds driven by animal or hand power, but is more especially
applicable to agricultural machines, and consists of a peculiar construction and
arrangement of governor or speed regulator through which the power is transmitted
to the machine to be driven, and by which the speed and power are rendered more
uniform and regular.
The improved governor consists essentially of a shaft driven either directly or
through the intervention of a strap or gearing from a first motion shaft worked by
a "horse power
or other like contrivance, or by hand.
"
On a central boss fixed on the governor shaft there is pivotted a fly wheel, the
rim of which in its normal position is inclined to the axis of the said shaft in lieu of
being at right angles thereto.
A second boss is also mounted on the governor shaft, and is free to be adjusted or
turned thereon, and to be moved longitudinally by such adjustment by having the
contact faces of the fixed and adjustable bosses made inclined.
A set screw in the adjustable buss serves to fix it in any required position when
adjusted.
In a recess made in the outer face of the adjustable boss there is fitted one end of
a helical spring which surrounds the shaft, the opposite end of such spring pressing
against a sliding boss or collar which is grooved circumferentially to receive the
forked end of a lever for actuating a pair of strap guides herein-after referred to.
The rim of the fly wheel is connected by a rod or link with the last-mentioned
sliding boss or collar, and the helical spring tends constantly to press such boss or

page_text: .
collar outwards, and to keep the rim of the fly wheel at an inclination to the
governor shaft. On imparting a rotary motion to this shaft the rim of the fly wheel,
by the action of centrifugal force, is caused to approach nearer to a righ angle to the
shaft, thereby drawing inwards the sliding boss or collar, and compressing more or less
the helical spring. As the speed diminishes the spring expands and forces outwards
the sliding boss or collar, thus imparting motion to the lever which actuates the
strap guides.
By adjusting the moveable boss so as to vary the power of the spring, the
governor may be made more or less sensitive, as required.
The strap guides, of which I prefer to employ two, serve to guide a strap along
two reversed cone pullies, one of which is mounted on the governor shaft itself,
whilst the other is mounted on the shaft to be driven, the tension of such strap
being regulated by mounting the bearings of the driven shaft in slots, and adjusting
the position of the said shaft by levers worked by rack-and-pinion motion from a
hand wheel.
The regulated or equalised driving motion may either be transmitted direct from
the last-mentioned shaft to the machine to be driven, or from a second shaft driven
therefrom by gearing, or otherwise.
The strap guides consist of two forked lever arms crossing each other and
working on fixed centres at opposite ends; these arms are coupled together by a
link so as to guide the strap along each cone pulley simultaneously and in concert,
and one of them is further connected by another link to the free end of the forked
lever herein-before referred to, from which they both derive their movements.