appar
Year: 1887

page_text: Date of Application, 7th Apr., 1887
Complete Left, 31st Dec., 1887
Complete Accepted, 3rd Feb., 1888
I, FRANCIS BUTTERFIELD, of the Midland Works, Keighley, in the County of York
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in machinery or apparatus for cutting or
shaping stone, (having two series of rotating cutters,) of the kind in respect of which
Patents were granted to James Holgate, No. 3888, dated 20th October 1877, and
No. 4752, dated 18th November 1880, and consists, Firstly, in dispensing with the
differential motion described and shewn in the last mentioned Patent, and substituting
therefor a suitable train of reducing gear by which a slow feeding movement of the
table carrying the material to be treated is obtained, as well as a quick return motion
thereof after such treatment.
Secondly. The table being arranged to move upon anti-friction rollers, those rollers
situated immediately beneath the axes of the revolving cutters are subject to greater
wear and tear than the rollers further away therefrom, and in order to meet this
inequality in wear and tear I mount such rollers in independent carriages so
arranged as to admit of vertical adjustment by which means a right line can be
maintained, and
Thirdly In order that those parts of the travelling table that bear upon and are
guided by the abovementioned anti-friction rollers, may the better withstand the
wear and tear to which, in this class of machinery they are subject, I attach to such
parts steel plates or other suitable hard material to enable them to do so.
Fourthly. In the rotating cutter holders in which the cutters are fixed by setscrews,
the breaking of such screws often cause considerable delay and inconvenience by the
difficulty experienced in removing them. To obviate this I cause supplementary and
interchangeable nuts for such set-screws to be inserted in the cutter holders so that in
the event of a set screw breaking the supplementary nut in which remains a portion
of the broken screw, can be readily removed and replaced by a duplicate and its set
screw and thus prevent much loss of time.
Lin 7th day of Anil 1987
THOS. EDWIN CRAVEN,
For the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in Machinery or Apparatus for Cutting or
Shaping Stone.
I, FRANCIS BUTTERFIELD, of the Midland Works, Keighley, in the County of
York, Engineer, 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 machinery or apparatus for cutting or
shaping stone, (having two series of rotating cutters,) of the kind in respect of which
patents were granted to James Holgate, No. 3888, dated 20th October 1877, and
No. 4752 dated 18th November 1880, and consists, Firstly--In dispensing with the
differential motion described and shewn in the last mentioned Patent, and substituting
therefor a train of reducing gear by which a slow feeding movement of the table
carrying the material to be treated is obtained, as well as a quick return motion
thereof after such treatment, but as there is no novelty in gearing of this description.
I lay no claim to it.
:-
Secondly The table being arranged to move upon anti-friction rollers, those
rollers situated immediately beneath the axes of the revolving cutters or thereabout,
are subject to greater wear and tear than the rollers further away therefrom.
In order to compensate for this inequality in wear and tear, I mount such rollers in
independent carriages so arranged as to admit of vertical adjustment in the alignment
thereof, by which means an accurate movement of the table can be maintained, and
Thirdly In order that those parts of the travelling table that bear upon and are
guided by the abovementioned anti-friction rollers may the better withstand the
wear and tear to which in this class of machinery they are subject, I attach to
such bearing parts hardened steel plates or other suitable hard material to enable
them to do so.
Fourthly In the rotating cutter holders in which the cutters are fixed by setscrews,
the breaking of such screws (though strong enough for holding the cutters,) through
excessive pinching often cause considerable delay and inconvenience by the difficulty
experienced in removing them for replacement. To obviate this I cause supplementary
and interchangeable nuts for the reception of such set-screws, to be inserted into the
entter head or stock so that in the event of a setscrew breaking, the supplementary
nut in which remains a portion of the broken screw, can be readily removed and
replaced by a duplicate and its setscrew and thus prevent much loss of time, and the
machine be kept working, while the broken screw can be removed from its nut
at leisure and a new one supplied thereto and kept in readiness as a replacer as
required.
In the annexed drawings similar letters refer to like parts wherever they occur.
Fig. 1. Sheet 1. is a front elevation showing a part of a stone cutting or shaping

page_text: Fig. 2, shews a portion of a plan of the bed or gauntry.-Fig. 3, is a side view
of the driving gear.-Fig. 4, Sheet 2, is a side elevation of the machine in part.
Fig. 5. is a side view of the rotating cutter blocks, and Fig. 6, an edge view of the
same. a, is the bed or gauntry, b, the anti-friction rollers mounted in carriages c,
adjustable in a vertical sense by setscrews d, or their equivalent, at one end thereof,
the other end resting in a suitable bearing c¹, in the gauntry a. e, is the travelling
table upon which the stone to be operated upon is mounted,-f, f, are plates of
hardened steel or other suitable hard material fixed to the underside of the table and
form the surfaces in contact with the anti-friction bearing rollers b, the said plates main-
taining a more correct and durable line for the travel of the table, thereby causing better
work to be produced by the machine, g, is one of the rotating cutter blocks; these
when in use are mounted upon one of the axes h,-i, are the setscrews for holding the
cutters, j, the supplementary nuts for the same, removable and replaceable in the
event of the breakage of any of the setscrews i. A supplementary nut and setscrew
are shewn to an enlarged scale in Figs. 7, and 8.
The driving gear not forming part of this invention is not described. It is similar
in construction to such gear already in use.
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 :-
1. In machinery or apparatus for cutting and shaping stone, mounting the anti-
friction rollers situated in the vicinity of or beneath the revolving cutters, in carriages
adjustable vertically, so that the wear and tear to which the rollers and their axles so
located are subject, may be compensated, substantially as hereinabove described and
shewn in the drawings.
2. In machinery or apparatus for cutting and shaping stone, the use of hardened
plates or surfaces attached to the travelling table where it bears upon the anti-friction
rollers, substantially as and for the purpose hereinabove described.
3. In a stone cutting and shaping machine having rotating cutters, the use in the
cutter heads or blocks, of supplementary interchangeable nuts such as j, for the set-
screws of the cutters substantially as and for the purpose hereinabove set forth and
shewn in the drawings.
5 Witness,
THOS. E. CRAVEN, C.E.,
Fel. Inst. Patent Agents,
24, Victoria Chambers, Leeds.
FRANCIS BUTTERFIELD.