IMPROVEMENTS IN SHEEP SHEARS
Year: 1884

page_text: We DAVID WARD, Manufacturer, and ALFRED DAVY, Engineer, both of Sheffield
in the County of York do hereby declare the nature of our said Invention for
IMPROVEMENTS IN SHEEP SHEARS to be as follows:-
Our improvement in Sheep Shears consists in the adaptation of one or more
auxilliary springs to the bow of the shear, with the means of adjusting the pressure
upon the bow to suit the requirements of the shearer, in the manner as hereinafter
described.
We
We are aware that springs have been applied to shears, and we therefore do not
claim such an adaptation absolutely.
In carrying our invention into practice, that is in the adaptation of an adjustable
auxilliary spring to a Sheep Shear of ordinary type, we use a light bow shaped
spring, the curved ends being arranged to rest against the inner surface of the
sides of the bow of the shear; and the centre of the spring being directly over the
centre of said bow. An adjusting screw is passed through the bow and the spring,
provided with a nut, by turning which, the spring may be compressed, or relaxed,
to meet the shearers fancy to the greatest nicety.
The ends of the spring may be prevented sliding laterally, by forming small lips
to engage on each side of the bow, or by a projecting stud on the bow working in
a slot in the spring, or other suitable device.
The spring may be plain, or it may be corrugated to give greater elasticity, and
it may be applied to shears with single or double bows.

page_text: COMPLETE SPECIFICATION,
We DAVID WARD, Manufacturer, and ALFRED DAVY, Engineer, both of
Sheffield in the County of York do hereby declare the nature of our invention
for IMPROVEMENTS IN SHEEP SHEARS and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement that is to say :-
Our improvements in Sheep Shears consist in the adaptation of one or more
auxiliary springs to the bows of sheep shears, with provision for adjusting the
pressure of the said spring or springs upon the bow of the shear, so as to suit the
requirements of the shearer, in the manner as hereinafter described; first premising
that we are aware that springs have been applied to shears, and therefore
we do not claim such an adaptation absolutely, but only substantially as herein
described.
And in order that our invention may be clearly and fully understood, we shall
in this our specification refer to the annexed sheet of drawings and to the letters
and figures marked thereon, the same letters of reference indicating the same parts
in any of the figures.
Fig 1. is a representation of a pair of Sheep Shears with an adjustable auxiliary
spring, according to our invention.
Fig 2, shows the adaptation of a waved or corrugated spring.
Fig 3, shows the adaptation of a spring to shears with a double bow.
In carrying our invention into effect, that is in the application of an auxiliary
spring to a Sheep Shear of the ordinary type, such as is represented in Fig. 1, we
preferably use a light bowshaped spring A, the curved ends B, B, being formed so
as to rest upon the inner surface of the sides of the bow C, the centre of the spring
being exactly over the centre of the said bow.
The ends of the springs may be formed with side lips to take upon each side of
the bow, and thus prevent any lateral or side movement; or a projection D in the
shape of a stud may be made upon the bow to work in a corresponding slot formed
in the end of the spring.
An adjusting screw E, is passed through the bow of the shear and the spring,
and is provided with a nut F, by turning which the spring may be either
compressed or relaxed, so as to adjust the expanding power of the shears.
The Spring may be corrugated or waved, to increase its flexibility, as is shown
in Fig 2, at G.
To adapt the auxiliary spring to shears made with what is known as a double
bow, whether such double bow is made of one continuous piece of material, or of
two pieces as represented in Fig. 3, a Clip H is secured upon the joint of the bow,
having an adjusting screw, which acts upon the spring as before described.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is:-
The adaptation and use of adjustable auxiliary springs applied to Sheep Shears
substantially in the manner herein before described, and as illustrated in Figures 1, 2,
and 3 in the annexed sheet of Drawings.
0011
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