IMPROVEMENTS IN WIRE FENCING WHEREBY A CONSTANT TENSION OF THE WIRES THEREOF IS PRODUCED to be as follows:-
Year: 1884

page_text: PROVISIONAL SPECIFICATION,
I, PETER STUART BROWN, of the Town and County of Inverness, North Britain,
Manufacturing Chemist do hereby declare the nature of the said invention for
"IMPROVEMENTS IN WIRE FENCING WHEREBY A CONSTANT TENSION OF THE WIRES
THEREOF IS PRODUCED to be as follows:-
"
This Invention which relates to improvements in wire fencing in order to
maintain a constant tension of the wires used therein.
For the purpose of making this object more distinct it is here explained that
over a long length of wire fencing on a hot day the wires become lengthened by
expansion through the influence of the sun's heat and on a cold day they are
analogously shortened.-By virtue of these influences the wires of a fence are
sometimes loosened and at others unduly strained and the purpose of this Invention
is to maintain a practically constant degree of tension therein.
The Invention consists in connecting each wire at intervals with a sufficient
length of spiral or equivalent spring, which, when the wire is lengthened by the
influence of the sun's heat, will by its reaction draw up the "slack" of the wire,
and which also, when the wires are shortened by the influence of cold, will yield
to that shortening.-The springs may be placed either in the winding or straining
posts or standards or longitudinally in the lines of the wires.

page_text: COMPLETE SPECIFICATION,
I, PETER STUART BROWN, of the Town and County of Inverness, North. Britain,
Manufacturing Chemist do hereby declare the nature of my said invention for
IMPROVEMENTS IN WIRE FENCING WHEREBY A CONSTANT TENSION OF THE WIRES
THEREOF_IS_PRODUCED and in what manner the same is to be performed, to be
particularly-described and ascertained in and by the following-statement:—.
My Invention relates to improvements in wire fencing in order to maintain a
constant tension of the wires used therein.
For the purpose of 'making this object more distinct, it is here explained that
over-a-long-length of wire fencing_on_a_hot day the wires become lengthened by
expansion through the influence of the sun's heat,-and-on-a-cold-day-they-are-
analogously shortened.-By virtue of these influences the wires of a fence are
sometimes loosened and at other times unduly strained and the purpose of my
present Invention-is-to-maintain a practically_constant degree of tension therein.
My Invention consists in connecting each wire at intervals, with a sufficient
length of spiral or equivalent spring, which, when the wire is lengthened by the
influence of the sun's heat, will, by its reaction draw up the "slack" of the wire,
and which also, when the wires are shortened, by the influence of cold, will yield
to that shortening. The springs may be placed either in winding or straining posts
or standards, or longitudinally in the lines of the wires.
In order that my said Invention may be properly understood and readily
carried into effect, I will now proceed to describe the drawings hereunto aunexed.
Figures 1, 2 and 3 are views partly in side elevation and partly in vertical
section of portions of wire fencing provided with springs in accordance with my
present Invention and all hereinafter clearly described.
With reference more particularly to Figure 1 of the annexed drawings, the fenco
wires a, pass through openings formed in the respectively opposite sides of the
post b. These wires a, pass at the interior of the said post b, over the pulleys c,
secured therein and their ends are made fast to the transverse head piece d, of the
vertical rod or bar e. The lower end of the bar e, has a screwed nut or other head
or plate f, upon it, and between the upper surface of this plate f, and the transverse
bolt g, the spiral spring h, is held in compression. It is obvious from the pressure
of the spring h, being in a downward direction upon the plate f, and by virtue of
the before mentioned connections with the wires a, that the pressure so created is
transmitted to the said wires a, exerting upon them, the longitudinal strain necessary
for maintaining them taut.
In the portion of fence represented at Figure 2 of the annexed drawings the
spiral spring h, as in the hereinbefore described arrangement, exerts a downward
pressure upon the plate f, and rod e, to which however the ends of the wires a, are
not secured as are the wires a, in the preceding example. The upper end of the
rod e, is secured to the vertical bar i, which carries the pulleys or rollers j. The
wires a, pass inwards and outwards through the sides of the post b, and are then

page_text: either passed under or as shewn at Figure 2, around the pulleys j, which, by reason
of the downward pressure upon them, tond to draw the wires a, into the position
represented upon the annexed drawing.
Figure 3, represents a portion of a fence wherein the longitudinal strain upon
the fence wires a, is created by means of spiral springs k, placed at any required
intervals apart along the said fence wires. These spiral springs k, may be secured
in position by any convenient means, and the fence wires a, aro supported at any
required positions by means of standards , and droppers m, which, forming no
part of my present Invention need not be herein further referrod to.
It is to be understood, in place of using spiral springs in the manner hereinbefore
described with reference to the annexed drawings, that I may, without departing
from the essential features of my present Invention, employ springs other than
spiral such for example as flat springs.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed, I declare that what
I claim is
First The improvements in wire fencing whereby a constant tension of the wires
thereof is produced, consisting of the combination of the pulleys c, (Figure 1) or j,
(Figure 2), vertical rod e, and spiral spring h, and their connections all substantially
as and for the purposes herein before set forth with reference to Figures 1 and 2 of
the annexed Drawings, or the mechanical equivalents of all or any of the said
parts.
Second-For the producing of constant longitudinal tension or strain in the wires
of wire fencing, the introduction therein of spiral springs k, or their mechanical
equivalents all substantially as and for the purposes herein before set forth with
reference to Figure 3 of the annexed Drawings.