Improvements in the Manufacture of Leather Belting.
Year: 1891

page_text: Date of Application, 13th Nov., 1891
Complete Specification Left, 13th Aug., 1892-Accepted, 17th Sept., 1892
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Leather Belting.
I, WILLIAM MATHWIN ANGUS of St. John's Leather Works, Newcastle-on-
Tyne, Manufacturer, do hereby declare the nature of this invention to be as
follows:-
This invention has reference to the manufacture of leather belting of the kind
known as leather link or chain belting, and is intended to overcome the difficulty
experienced owing to the pins which run through and connect the links being rigid
so that they will not accommodate themselves to crowned or bevelled pulleys, that
is to say pulleys the periphery of which is of convex section, and consequently
only the middle of the belt grips the pulleys. Various contrivances have been
employed to obviate this; one is the use of a leather hinge in the middle of the
belt; another is to employ thicker links at the side of the belt than in the middle,
but this method of construction is defective inasmuch as the middle of the belt
having thinner links is of much less strength than the sides.
"
Now according to my invention I make link or chain belting in the usual way,
that is with links of the same size throughout and with transverse rigid pins
connecting them. The pins, however, are of flat, oval or other than circular
section and the holes in the links are of the same shape so that the pins are
prevented turning round when the belt is in work; I then " crown or give a
transverse curve to the belting to any given radius by passing it between two
rollers, one concave and the other convex. For extra deep crowning," that is
where the pulleys have an extreme bevel, part of the links on the underside of the
belt can be made slightly wedge-shaped to allow for difference of outer and inner
radius.
Among the advantages obtained by means of my invention I may mention
simplicity of manufacture, capability of adapting the belting to any radius within
the half circle; reduction of oscillation of the belting to a minimum thereby
removing the necessity of flanges for high speeds and thus saving side friction and
wear of belting; no weakening of the belting in the process of crowning as it
retains the same substance throughout; the belting can be made to drive on more
than one crown on the same sheave and can thus take the place of rope drives;
the belting can be brought back to the flat form if at any time so required.
Dated this 13th day of November 1891.
J. C. MEWBURN,
55 and 56, Chancery Lane, London, Chartered Patent Agent.
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Leather Belting.
1, WILLIAM MATHWIN ANGUS of St. John's Leather Works, Newcastle-on-
Tyne, Manufacturer, 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 has reference to the manufacture of leather belting of the kind
known as leather link or chain belting, and is intended to overcome the difficulty
experienced owing to the pins which run through and connect the links, being
rigid so that they will not accommodate themselves to crowned or bevelled pulleys,
that is to say pulleys the periphery of which is of convex section and consequently

page_text: only the middle of the belt grips the pulleys. Various contrivances have been
employed to obviate this; one is the use of a leather hinge in the middle of
the belt another is to employ thicker links at the side of the belt than in the
middle, but this method of construction is defective inasmuch as the middle of
the belt having thinner links is of much less strength than the sides
"
Now according to my invention I make link or chain belting in the usual way,
that is with links of the same size throughout, and with transverse rigid pins
connecting them. The pins, however, are of flat, oval, or other than circular
section, and the holes in the links are of the same shape so that the pins are
prevented turning round when the belt is in work, I then "crown or give a
transverse curve to the belting to any given radius by passing it between two
rollers; one concave and the other convex. For extra deep "crowning" that is
where the pulleys have an extreme hevel, part of the link on the underside of the
belt can be made slightly wedge shaped to allow for difference of outer and inner
radius.
The accompanying drawings will serve to illustrate my invention.
Figure 1 represents one of the pins such as we employ ; they may be either of
flat section as shown or of oval or other than circular section.
Figure 2 represents one of the links the holes in which are of the same shape as
the
pins so that the pins will not turn round in them.
Figure 3 is a perspective view of a piece of the finished belting. In making it
the parts can be first put together to form flat belting in the manner usually
followed in making link belting and then the belting including the pins is given the
required transverse curve by passing it between suitably shaped rollers.
Among the advantages obtained by means of my invention I may mention
simplicity of manufacture, capability of adapting the belting to any radius within
the half circle, reduction of oscillation of the belting to a minimum thereby
removing the necessity of flanges for high speeds and thus saving side friction and
wear of belting: no weakening of the belting in the process of crowning as it
retains the same substance throughout; the belting can be made to drive on more
than one crown on the same sheave and can thus take the place of rope drives, the
belting can be brought back to the flat form if at any time so required.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, 1 declare that what I
claim is :-
The improved leather belting hereinbefore described.
J. C. MEWBURN,
55 and 56, Chancery Lane, London, Chartered Patent Agent.