IMPROVEMENTS IN ECCENTRICS
Year: 1885

page_text: We JOHN HEALD of Mansfield Holbeck Leeds Mechanic and EDGAR BRAY of
Meanwood Road Leeds Mechanic both in the county of York do hereby declare
the nature of our said invention for IMPROVEMENTS IN ECCENTRICS, to be as
follows:-
The object of our Improvements is so to construct eccentrics, that the wear and
tear is reduced to a minimum, the lubrication of the same is more efficiently
performed, repairs are but rarely required and are then easily effected, the size of
the eccentric for a given throw is much reduced, and lastly the durability is very
much increased.
The construction of our eccentric is as follows. On the shaft is keyed forged or
otherwise fixed a circular disc, the edge of which is bevelled off towards one side,
which will be called the inner side. The shaft preferably passes through a boss
forged or cast on the disc, the boss being eccentrically placed on the disc. A second
disc is passed over the shaft, the hole in this disc for the shaft to pass through,
being in a corresponding position (ie eccentrically placed) to the hole through the
boss of the first disc. The edge of this second disc is similarly bevelled off towards
the side facing or opposite the first disc.
Between these two discs fits the eccentric strap, hoop, or spectacle as it is
variously called, the sides or edges thereof being bevelled to correspond to the
bevelled edges of the discs. The two discs are connected together by means of a
nut and a bolt passing through the centre of the two discs. In order however to
prevent the discs being nipped too tight on the strap or hoop, a washer or collar is
fitted on the bolt between the discs. As the discs and the hoop wear on their
bevelled edges, this collar or washer is taken off, reduced in thickness, and replaced,
Bo that the wear may be taken up and a suitable pressure only put upon the hoop
and discs. This pressure may be regulated by placing an elastic washer upon the
centre bolt, but for most cases it will suffice to adjust the thickness of the washer
or collar placed between the discs, as above mentioned.
With this construction of eccentric an annular space is enclosed between the two
discs and the hoop, such space serving as a chamber for the oil or other lubricant.
Before pouring in the oil we prefer to pack this chamber loosely with cotton wool,
felt, or other suitable material for soaking up the oil. The oil is admitted to the
chamber in the usual manner from a large oil cup fixed on the hoop or strap.
With this our construction of eccentric, we find that it can be run for a great
length of time without requiring a renewed supply of lubricating material.
Dated this 18th day of October 1885

page_text: We JOHN HEALD of Mansfield, Holbeck, Leeds, Mechanic and EDGAR BRAY of
Meanwood Road Leeds, Mechanic, both in the County of York do hereby declare
the nature of our invention for IMPROVEMENTS IN ECCENTRICS and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement:-
The object of our Invention is so to construct eccentrics, that the wear and tear
is reduced to a minimum, the lubrication of the same is more efficiently performed,
repairs are but rarely required and are then easily effected, the size of the
eccentric for a given throw is much reduced, and lastly the durability is very
much increased.
The construction of our eccentric is as follows. On the shaft is keyed forged or
otherwise fixed a circular disc, the edge of which is bevelled off towards one side,
which will be called the inner side. The shaft preferably passes through a boss,
forged or cast on the disc, the boss being eccentrically placed on the disc. A second
disc is passed over the shaft, the hole in this disc for the shaft to pass through
being in a corresponding position (ie eccentrically placed) to the hole through the
boss of first disc. The edge of this second disc is similarly bevelled off towards
the side facing or opposite the first disc.
Between these two discs fits the eccentric strap, hoop, or spectacle as it is
variously called, the sides or edges thereof being bevelled to correspond to the
bevelled edges of the discs. The two discs are connected together by means of a
nut and bolt passing through the centre of the two discs. In order however to
prevent the discs being nipped too tight on the strap or hoop, a washer or collar is
fitted on the bolt between the discs. As the discs and the hoop wear on their
bevelled edges, this collar or washer is taken off, reduced in thickness, and replaced;
so that the wear may be taken up and a suitable pressure only put upon the hoop
and discs. This pressure may be regulated by placing an elastic washer upon the
centre bolt, but for most cases it will suffice to adjust the thickness of the washer
or collar placed between the discs as above mentioned.
{
With this construction of eccentric an annular space is enclosed between the
two discs and hoop, such space serving as a chamber for the oil or other lubricant.
Before pouring in the oil, we prefer to pack this chamber loosely with cotton wool,
felt, or other suitable material for soaking up the oil. The oil is admitted to the
chamber in the usual manner from a large oil cup fixed on the hoop or strap.

page_text: general construction of our improved eccentric; and Figs. 5–7 a modification
specially applicable for actuating the dabbing brushes of Nobel's Combing
Machines.
•
Fig. 1 is an axial or longitudinal section, Fig. 2 a front view with the cover or
front disc removed, Fig. 3 a side view, and Fig. 4 a front view of the general
construction of our eccentric.
On the shaft a is keyed, forged, or otherwise fixed a circular disc b, the edge of
which is bevelled off towards one side, which will be called the inner side. The
shaft a preferably passes through a boss, forged or cast on the disc b; the boss
being eccentrically placed on the disc. A second disc or cover c is passed over the
shaft, the hole in this disc c for the shaft a to pass through, being in a corre-
sponding position (ie eccentrically placed) to the hole through the boss of the first
disc b. The edge of this second disc o is similarly bevelled off towards the side
facing the opposite or first disc b.
Between these two discs b and c fits the strap, hoop or spectacle, d, the sides or
edges thereof being bevelled to correspond to the bevelled edges of the discs b and c
The two discs are connected together by means of a nut, and bolt e, passing through
the centre of the two discs. In order however to prevent the discs b and c being
nipped too tight on the strap or hoop d, a washer or collar g is fitted on the bolt e,
between the discs. As the discs and hoop wear on their bevelled edges, this collar
or washer g is taken off reduced in thickness and replaced.
With this construction of eccentric a chamber n is enclosed between the two
discs b and c and the hoop or strap d, which serves as a reservoir for the oil or
other lubricant. Before pouring in the oil or other lubricant, we prefer to pack
this chamber with cotton wool, felt, or other suitable material for soaking up the
oil. The oil is admitted to the oil reservoir n in the usual manner from an oil cup
fixed on the hoop or strap d.
Fig. 5 is an axial or longitudinal section, Fig. 6 a cross section on line A B
Fig. 5, and Fig. 7 a side view, of eccentric possessing our improvements, and
specially designed for actuating the dabbing brushes of Nobel's Combing Machines.
In this modification the disc b forms the face of the driving pulley h, the inclined
or bevelled side b¹ being cast as a projection on the face 6 of the pulley h. The
disc or cover c is cast or formed in one piece with the strap or hoop d. The
driving pulley h runs loose upon the conical or taper end of the stud a, such stud a
being bolted to the frame or pillar carrying the dabbing brush mechanism. Any
wear between the boss of the pulley h and the taper end of the stud a, can be
taken up by means of the nut ; and the set screw k. Similarly the fit of the strap
or hoop d on the conical or bevelled surface 61 can be adjusted by means of the
bolt e, which is screwed in the boss of the pulley h and locked by the set screw m.
The oil chamber or reservoir n is clearly shewn in Figs. 5 and 6. The oil or
other lubricant may be admitted thereto from an oil cup fixed to the front disc or
cover c.
The same letters are employed in the drawings and description of both designs
to represent similar or corresponding parts.
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 :-
1° The oil chamber or reservoir n formed in the body of the eccentric. sub-
stantially as herein set forth and shewn in Figs. 1, 2, 5 and 6 of the accompanying
drawings.
2° The eccentric strap or hoop & having internal bevelled sides (or side) fitting
and working on corresponding bevelled sides (or side) of the eccentric discs sub-
stantially as herein set forth and shewn in Figs. 1, 2, 5, and 6 of the accompanying
drawings

page_text: 3°. The bolt e for taking up the wear of the eccentric strap and discs substan-
tially as herein set forth and shewn in Figs. 1, 2, 5 and 6 of the accompanying
drawings.
4°. The eccentric disc b b¹ Fig. 5 (preferably cast or formed in one piece with
the driving pulley 'h), and the closed strap d c, the former running on the conical
end of the fixed stud a, substantially as herein set forth and shewn in Fig. 5 of the
accompanying drawings.