Improvements in the Construction of Eccentrics and their Straps or Mountings.
Year: 1898

page_text: Date of Application, 28th Oct., 1898
Complete Specification Left, 27th July, 1899-Accepted, 2nd Sept., 1899
PROVISIONAL SPECIFICATION.
Improvements in the Construction of Eccentrics and their Straps
or Mountings.
I, JOHN THOMAS MILSON HIRCOCK, of 128, Edwards Street, Ballsall Heath,
Birmingham, in the County of Warwick, Engineer, do hereby declare the nature
of my said invention to be as follows:-
My invention has for its object improvements in the construction of eccentrics
and their straps or mountings by which I am enabled to reduce the wear and
tear and friction in the working of such eccentrics and also to facilitate the
driving power.
According to my invention I form the eccentric block with a groove around
its periphery and the strap or straps which embrace it with an internal groove
to receive a continuous ring of balls so that the eccentric block would in any case
run either upon balls or rollers and not metal to metal as is now the custom in
engine and machine work. The strap may be split at one or more parts of its
circumference and may have lugs formed at the junction or junctions for adjust-
ment or tightening the parts together or the strap or eccentric block may be
split centrally through its plane one or both and fastened together with rivets
or bolts or screws which may be tightened to take up the wear when necessary
and for convenience in mounting the balls. Such eccentrics may be made from
any desired metal or metals and to suit various requirements for which eccentrics
are used.
1 1.
OMAL 1
11000
Improvements in the Construction of Eccentrics and their Straps
or Mountings.
I, JOHN THOMAS MILSON HIRCOCK, of 34, Priestley Road, Sparkbrook, Birming-
ham, in the County of Warwick, Engineer, formerly of 128, Edwards Street,
Ballsall Heath, do hereby declare the nature of my said invention and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement:-
My invention has for its object improvements in the construction of eccentrics
and their straps or mountings for the purpose of reducing wear and tear and
friction in the working of the same.

page_text: According to my invention I form the eccentric block with a groove
around its periphery and the strap or straps which embrace it with
an internal groove to receive a continuous ring of balls so that the eccentric block
would run upon balls and not metal to metal as is now the custom in engine and
machine work. The strap is formed in two parts or split at the centre and
fastened together with bolts or screws or the like which may be tightened to
take up the wear when necessary and for convenience in mounting the balls such
eccentrics may be made from any desired metal or metals and to suit the various
requirements for which eccentrics are used.
In order that my invention may be clearly understood and more easily carried
into practical effect I have appended hereunto two sheets of drawings upon which
I have illustrated examples of my eccentrics.
Figure 1 is a front view of my eccentric complete.
Figure 2 is a cross sectional view of Figure 1.
According to my invention I form the eccentric block A with the groove a
around its periphery, and the strap B which embraces it is formed with the
groove b corresponding to the groove a¹ to receive a continuous row of balls D)
Or rollers or wheels may be used instead of balls, This strap B is formed in two
parts and 2 or split at its centre and these parts are fastened together by the
bolts bor by screws and in order to allow for adjustment in case of wear I fit
between the flanges 65 and 66 through which the bolts pass the strip of soft metal b
or wood or other suitable material which will give when the eccentric requires
adjustment.
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 :-
CLAIM.
The improvements in the construction of eccentrics and their straps or mount-
ings consisting essentially in forming a groove around the periphery of the
eccentric block with a corresponding groove around the inner circumference of
the eccentric strap or mounting for the reception of balls wheels or rollers the
said strap or mounting being split or divided into two parts around its periphery
and united together by fastenings and with or without a strip of soft metal or
other material interposed between the two parts to allow for adjustment in the
manner and for the purpose substantially as herein set forth and as shewn.
Dated this 26th day of July 1899.
JOHN THOMAS MILSON HIRCOCK.
By George Barker,
Fellow of The Chartered Institute of Patent Agents.
Agent for Applicant, 77, Colmore Row, Birmingham.