Improvements in Machines for Planing, Turning, and Boring.
Year: 1888

page_text: Date of Application, 29th Nov., 1888
Complete Specification Left. 29th Aug., 1889-Accepted, 12th Oct., 1889
PROVISIONAL SPECIFICATION..
Improvements in Machines for Planing, Turning, and Boring.
I, JOHN CROW of 5 Afton Crescent, Paisley Road West, Glasgow, Engineer, do
hereby declare the nature of this Invention to be as follows:-
This Invention relates to machines for planing, turning and boring, the improved
machine being designed more especially for operating on built cranks whose centres
and crank pin holes are hored, faces planed and ends and sides turned in a single
machine of the improved construction.
The combined planing, turning and boring machine is composed of a fixed bed and
side standards carrying a bridge or cross slide similar to that of an ordinary planing
machine hut having in lieu of a traversing table a central vertical fixed stud over the
bed and whereon is fitted an ordinary horizontal chuck with a toothed wheel carrying
an adjustable tool holder or holders. This wheel is preferably toothed internally and
is driven by a pinion on a shaft having on it a worm wheel actuated by a worm on a
shaft provided with fast and loose pulleys driven by open and cross belts or other
reversing gear. On the bridge or cross slide one two or more adjustable tool holders
are fitted and provided with tools adapted for boring holes in the cranks and planing
or turning their faces. In the operation of the machine for planing the cranks are
secured preferably a pair at a time over the chuck or wheel carried by the central
fixed stud and the said wheel is rotated like the chuck of a lathe whilst the planing
tools are brought down to plane or turn the faces of the cranks.
After one face is
planed the cranks are inverted and the opposite faces similarly acted on. In boring
the centres and crank pin holes the part to be bored is brought directly over the axis
of the rotating toothed wheel and a suitable cutting tool carried by one of the tool
holders on the bridge is brought down to bore or cut out the piece to form the orifice
whilst the crank is rotated by the wheel on the axis of said orifice as a centre.
turning the sides of the cranks which are concave and are usually arcs of circles two
cranks are secured side by side over the rotating wheel and at such a distance apart
that the adjoining sides when finished constitute arcs of the same circle. A turning
or boring tool is then fed down to bore out the opening between the cranks and
thereby turn and finish the adjoining sides of the two cranks. The cranks are there-
after inverted and the opposite sides turned in like manner. In turning the ends the
cranks are fixed with the centre or hole directly over the central stud and held
stationary whilst the wheel underneath carrying the turning tool is rotated only
through such part of a revolution as is necessary to carry the tool round the end of
the crank and is then reversed the reversing movement being effected automatically
by the belt gear before referred to and the tool being also reversed so as to cut both
ways. When one end bas been turned the opposite end is placed in position for
turning. The several tool holders are or may be fitted in slides and provided with
means of adjustment such as are well known as applied to ordinary planing turning
and boring machines.
Dated this Twenty-eighth day of November 1888.
In
CRUIKSHANK & FAIRWEATHER,
62, Saint Vincent Street, Glasgow, Agents.
COMPLETE SPECIFICATION.
Improvements in Machines for Planing, Turning, and Boring.
I, JOHN CROW of 5 Afton Crescent, Paisley Road West, Glasgow, 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 machines for planing turning and boring, the improved

page_text: machine being designed more especially for operating on built cranks whose centres
and crank pin holes are bored, faces planed and ends and sides turned in a single
machine of the improved construction.
As represented in the accompanying drawings in sectional front elevation at
figure 1, in plan at figure 2 and in end elevation at figure 3 the combined planing,
turning and boring machine is composed of a fixed bed A and side standards B B
carrying a bridge or cross slide (having planing turning or boring tools similar to
that of an ordinary planing machine but having in lieu of a traversing table a central
vertical fixed stud D over the bed and whereon is fitted an ordinary horizontal chuck E
with a toothed wheel F carrying an adjustable tool holder or holders G. The wheel F
is preferably toothed internally and is driven by a pinion H on a shaft I having on it
a worm wheel J actuated by a worm K on a shaft L provided with fast and loose
pulleys M driven by open and cross belts N or other reversing gear. On the bridge
or cross slide C one two or more adjustable tool holders O, O, are fitted and provided
with tools adapted for boring holes in the cranks and planing or turning their faces.
In the operation of the machine for planing, the crank or cranks X is or are secured
singly, or a pair at a time, over the chuck or wheel carried by the central fixed stud D
and the wheel F is rotated like the chuck of a lathe whilst the planing tools, are
brought down to plane or turn the faces of the cranks. After one face is planed the
crank or cranks X is or are inverted and the opposite faces similarly acted on. In
boring the centres and crank pin holes the part to be bored is brought directly over
the axis of the rotating toothed wheel F and a suitable cutting tool carried by one of
the tool holders O on the bridge C is brought down to bore or cut out the piece to
form the orifice whilst the crank is rotated by the wheel F on the axis of said orifice
as a centre. In turning the sides of the cranks, which, as indicated at a are concave
and are usually arcs of circles two cranks are secured side by side over the rotating
wheel F and at such a distance apart that the adjoining sides when finished constitute
arcs of the same circle. A turning or boring tool is then fed down to bore out the
opening between the cranks and thereby turn and finish the adjoining sides of the
two cranks. The cranks are thereafter inverted and the opposite sides turned in like
manner. In turning the ends the cranks are fixed with the centre or hole directly
over the central stud D and held stationary whilst the wheel Funderneath carrying
the turning tool G is rotated only through such part of a revolution as is necessary
to carry the tool round the end of the crank and is then reversed, the reversing
movement being effected automatically in any well known way by the belt gear before
referred to and the tool being also reversed so as to cut both ways.
When one end
has been turned the opposite end is placed in position for turning. The several tool
holders are or may be fitted in slides and provided with means of adjustment such as
are well known as applied to ordinary planing turning and boring machines.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is
1. The combination of parts constituting the improved machine for planing, turning
and boring built cranks and other articles substantially as herein before described.
2. In a machine for planing turning or boring the combination of a wheel carrying
a tool holder or holders and adapted to be rotated on a central stud and chuck and
an overhead bridge carrying planing or boring tools substantially as described.
3. In a machine for planing, turning or boring the combination of a central fixed
stud and chuck (D, E) and a rotating wheel (F) on said stud carrying a tool holder
or holders for operating on the work substantially as described.
Dated this Twenty eighth day of August 1889.
CRUIKSHANK & FAIRWEATHER,
62, Saint Vincent Street, Glasgow, Agents.