Improvements in Machinery for Stop Chamfering or similarly Ornamenting Timber and the like.
Year: 1893

page_text: COMPLETE SPECIFICATION.
Improvements in Machinery for Stop Chamfering or similarly
Ornamenting Timber and the like.
We JOSEPH JONES of Cambrian Steam Saw Mills, Timber Merchant, and
ANDREW LEACH of Oakfield Terrace Llanidloes Road, Machine Joiner, both of
Newtown in the County of Montgomery, do hereby declare the nature of this inven-
tion 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 a machine for "stop chamfering" or making similarly
ornamental cuts on the corners of timber and the like; the principal object of the
invention being to make long or short cuts or chamfers on the corners with bevilled
"
ogee or other ornamental ends not hitherto produced by such or similar
machines..
$6
The nature of our said invention and the manner in which the same is to be
performed or carried into practical effect will be readily understood on reference
to the two sheets of drawings hereunto annexed and the following explanation
thereof.
:
Fig. 1 on the drawings is a plan view, Fig. 2 a front elevation, and Fig. 3 a side
elevation of a wood working machine with our improvements shown as applied
thereto.
The remaining figs. are detached views of the improved portions of the machine
hereinafter more particularly referred to and drawn to a larger scale.
The principal novel feature of our invention is a cutter block or tool holder A
shown detached in face view at Fig. 4 and edge view at Fig. 5 which is made of
various sizes suitable for the work required. It is provided with four six or other
convenient number of faces B and is mounted on the rising and falling spindle 6 of
the wood working machine (see Figs. 1, 2, 3).
To each face B of the holder a cutter or tool C or C' is adjustably secured by a
screw bolt D passing through a slot in the cutter, and tapped into the holder, or by
any other suitable meaus of fastening.
The faces or planes B on the periphery of the holder A have their breadths
bevilled or inclined to an angle (preferably of about 45°) to the sides theroof as
seen on the edge view Fig. 5, each alternate plane being inclined towards one side,
and the intermediate planes inclined towards the opposite side thereof.
The holder A is also so constructed that the faces B overhang the sides of the
body of the holder in such a way that the planes inclined to one side thereof
revolve in a different path to the planes inclined to the other side thereof as shown
on Figs. 4 and 5 which enables the cutters C and C¹ to be so adjusted as to cut the
chamfer and both stops (see Fig. 10) at one operation.
It will be observed that this chamfer is made with bevilled ends or stops, whereas
in chamfering machines as hitherto constructed it was only possible to cut concave
curved ends. This, we are enabled to do by mounting the cutter spindle 6 on the
machine with its axis parallel to the length of the timber to be cut, instead of
transversely or at right angles thereto as hitherto invariably practised. This forms
an important feature of our invention as by this means we can, by shaping the
contour of the cutting tools accordingly, make the ends or stops of the chamfer of
various ornamental moulded forms as shown at Fig. 11 or we can ornament the
corners of the timber by short stop chamfers or cats as shown at Fig. 12.
In combination with this arrangement, of cutter holder we employ adjustable
ences or guides E (see detached views Figs. 6 and 7) bolted to the table of the
nachine (see Fig. 1) by screw bolts F.

page_text: There is one fence or guide on each side of the cutter or tool holder A placed at
right angles to the path of the revolving cutters and parallel to the axis of the
shaft b which carries the tool holder.
The timber to be chamfered is put into the fences E at one stop, and then moved
from right to left, or vice versa, against the fences until the desired length of chamfer
is completed.
The fences E being adjustable to and from the rising and falling spindle b which
carries the cutters C and C, the size and angle of the chamfer can be varied to
suit requirements.
•
In combination with these fences we also employ spring stops G (see detached
views Figs. 8 and 9) which consist of a catch a working in the end of, and held at
right angles to the slotted piece G by the spiral spring c which may be adjusted to
the proper tension by a screw d.
The spring stops & are bolted down by screw bolts e tapped into the fences E as
shown at Fig. 1.
If the timber to be chamfered is mortised (as for framing for example) the
spring stops G are adjusted one on each fence E and near the tool holder so as to
fly out into the mortise and stop the chamfering at the place required; and if the
timber should be tenoned on the ends, the catches a can be reversed so as to catch
the shoulders or ends of the timber.
To suit the different facings of timber to be chamfered the spring stops G can be
packed up to the required height to engage with the mortises and shoulders of the
pieces of timber operated upon by inserting small strips of hard wood beneath
them. The principal use of these spring stops is to save the time and trouble of
marking or setting out the timber.
We would here observe that although, for the purposes of illustration, we have
shown our improvements as applied to a particular well known form of wood
working machine we wish it to be understood that our said improvements_arc
equally applicable to other forms of chamfering or wood working machines and to
saw benches and the like when used for stop chamfering.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
.
First. In stop chamfering or other machines for ornamenting the corners or
angles of timber and the like, a revolving cutter block or tool holder having four,
six, or other number of planes around its periphery, and having their breadths
inclined alternately towards the two sides of the holder; the planes inclined to one
side revolving in a different path from those inclined to the opposite side, in the
manner and for the purpose substantially as hereinbefore described and illustrated
by the drawings annexed.
Secondly. In combination with a revolving tool holder the placing of the fences
or guides of stop chamfering machines at right angles to the line of revolving
cutters and parallel to the axis of the shaft which carries the holder, in the manner
and for the purpose substantially as hereinbefore described and illustrated by the
drawings annexed.
Thirdly. In combination with the above described (or other) fences or guides of
stop chamfering machines the use of spring stops to engage with the mortises,
shoulders, or ends of the pieces of timber operated upon in the manner and for the
purpose substantially as hereinbefore described and illustrated by the drawings
annexed.
GEO. DAVIES & SON,
4, St. Aun's Square, Manchester, Agents for the Applicants.