Improvements in Driving Belts.
Year: 1888

page_text: Date of Application, 29th Oct., 1888
Complete Specification Left, 29th July, 1889-Accepted, 14th Sept.,
1889
PROVISIONAL SPECIFICATION.
Improvements in Driving Belts.
I, JOHN JOHNSTONE Senr. of Gogo Mills, Largs, in the County of Ayr, North
Britain, Grain and Saw Miller, do hereby declare the nature of this invention to be as
follows:-
This Invention relates to improvements in Driving Belts and is as follows.
In accordance with one form of my Invention, I form the belt of wood links,
preferably willow, and I thread the said links together by cross pins after the manner
of making ordinary leather link belting.
In order to relieve the said wood links of strain, I may apply wire links, or links
stamped, or forged out of any suitable metal, at the edges of the belt, the said metal
links being each hinged upon the same pins as those hinging the body of the belt.
As a substitute for wood I may employ cork for the body of the belt, the strain
being taken by similar outside metal links.
The pulleys may if desired, be coated with Indiarubber, or like material, or in lieu
thereof I may coat the face of the wooden links with similar material, or every
alternate link may be coated.
The belt in accordance with iny said Invention, is much cheaper to manufacture
than any link belts at present in use, may be made as strong, and has a substantial
body which not affected by atmospheric changes.
The belt even on an uncoated pulley will not slip upon an even strain, but will slip,
with advantage, upon any sudden excessive strain.
As a modification of my Invention I employ three, or any number of stranded
wires, or their equivalent, and I thread wooden links, each of a length the width
of the belt, upon these in a position at right angles to the belt's length, that is to
say the length of the said wires; in this case the strain is entirely taken up by the
wires, the wood links forming a body for the belt.
Dated thin 97th dose of October 1888
JOHNSONS,
115, St. Vincent Street, Glasgow, Petitioner's Agents.
COMPLETE SPECIFICATION.
Improvements in Driving Belts.
I, JOHN JOHNSTONE, senior of Gogo Mills, Largs, in the County of Ayr, North
Britain, Grain and saw Miller do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
This Invention relates to improvements in driving belts or bands.
In accordance with one form of my said Invention I form the belt of wood links
preferably willow, and I thread the said links together by cross pins after the manner
of making ordinary leather link belting.
Figure 1, of the accompanying sheet of drawings represents a plan of one method
of carrying out my invention; I employ a series of wood links A, which are bound
together so as to form a continuous belt or band, by means of the pins or wires B;
the said pins have solid heads b, at the one edge of the belt, and at the other edge
rivetted heads b', are formed over washers 62, in order to keep the said heads of the
pins from contact with the shifting fork of the pulley, and for other obvious purposes
prefer to form a groove a, along the edges of the belt, within which the heads of the
pins are sunk, as shewn more particularly in the edge view, Figure 2.

page_text: Figure 3 shews a modification of my said Invention in which I may employ
of cork C, or of other similar wood or material, which are let into the body of the
belt for the purpose of allowing expansion and contraction through atmospheric
changes; the said pieces may be of any convenient shape, such as circular and square
as shewn at C, and C2, respectively of the edge view Figure 4, and they may be 5
arranged in the body of the belt as found most suitable.
I may adapt my improved belting to pulleys having grooves or corrugations by
shaping the underside of the links to correspond with the said grooves, such a develope-
ment of my said improvements is shown in sectional front elevation Figure 5, in
which D, is the pulley and E the V shapes given to the one side of alternate rows of L
the links, a side view of the said V formations is shown in the side view, Figure 4.
Figure 6 shows a modification in which the underside of the link is concaved to fit
the corrugations or convexities F, of a pulley of this formation.
Figure 7, sheet 2 is a plan of a portion of a modified form of my link belting.
Figure 8, being a side view of the same; in this modification I employ 3 rows of 1
links only.
In all my several modifications I may coat the face of the links with india rubber
or equivalent material or I may add a strip of leather or felt; such a strip of felt for
example I have shewn at G, Figure 8.
In plan Figure 9. and edge view Figure 10, I have shown a modification in which
a double pair of links may be employed to make up the centre of the band; in this
modification (but the arrangement is also applicable to other modifications) I may
employ a continuous chain of metal links H, to take up the strain; the said metal
links may be entirely hidden or covered by embedding them in recesses formed in
those sides of the links which are contiguous to each other as shown in the drawing;
I may however employ such metal linking at the outside of the band or belt, such
an arrangement I have shewn in Figures 11, 12 and 13, being a plan, side view and
end view respectively; in this modification however 1 have shown the band made
of a single line of wooden links in the formation of the body of the band, this
modification may take the place of the ordinary driving rope.
up
As a modification in the arrangement of the wooden body of my belt, I may
thread the links J, with their length at right angles to the belts length, upon
stranded wires K, the said wires taking up the strain of the belt in the same way
This belt is applicable as a twist or
as the metal links herein before described.
quarter twist belt.
In accordance with my said. invention I am enabled to produce a belt having a
maximum of strength at a minimum of cost to manufacture; and any degree o
strength may be obtained. Also the belt is not affected by atmospheric changes and
consequently keeps it shape and tension between the pulleys, and is not subject to
change, also the body of the belt always keeps flat or rigid transversely and therefor
, always keeps an even grip upon the pulley.
Having now particularly described and ascertained the nature of my said Inven
tion and in what manner the same is to be performed I declare that what
claim is-
First. In the construction of driving belts or bands the employment of wood block
or links substantially in the manner and for the purposes as herein before describe
with reference to the accompanying drawings.
Second. In the construction of driving belts or bands, the arrangement and co
struction of the wood blocks J, in combination with the wire strands K, substantial
as herein before described with reference to Figures 14 and 15 of the accompanyi
drawings.