A New or Improved Mitre Cutting Tool and Clamp for Frames and the like.
Year: 1895

page_text: Date of Application, 28th Oct., 1895-Accepted, 14th Dec., 1895
[Communicated from abroad by SUMMERS BROWN, of Mossman, near Sydney,
in the Colony of New South Wales, Merchant.]
A New or Improved Mitre Cutting Tool and Clamp for Frames
and the like.
I, CECIL URQUHART FISHER, of 45 Holborn Viaduct, London, England,
Patent Agent, 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 has for its object the providing of apparatus in which the cutting
of frame bevels can be accomplished with facility and despatch, and the pieces
when cut, clamped securely together in place, so as to facilitate the trying and
setting of the angles, and expedite the nailing or securing together of the several
parts.
But to make the invention and the method of carrying the same into practice
better understood reference is had to the accompanying drawings in which
Fig. 1 is a side sectional elevation of the apparatus one of the arms being removed
so as to show the straining gear,
Fig. 2 plan of one of the arms,
Fig. 3 plan of the apparatus set to make a frame the sides of which are of equal
length,
Fig. 4 side elevation of one of the arms,
Fig. 5 enlarged detail side elevation of bevel box,
Fig. 6 plan of Fig. 5, Fig. 7 end elevation of same,
Fig. 8 section through line A B Fig. 5, and Fig. 9 similar view to Fig. 5, with
top piece slid up.
1 is an arm in which a central depression 2 is formed to provide accommodation
for the straining gear. In this arm an aperture 3 is formed through which the
other arm 4 is inserted. This arm is preferably made in two pieces to perinit
of its being readily fitted into place. It is joined together with fish plate 5.
6 is the pivot or king bolt securing the apparatus to a bench or table and about
which it can freely be swung. 7 is a hand wheel provided on underside with
bevel teeth, gearing into pinions 8, secured on the spindles or straining screws 9
and rotating in bearings 10. 11 are sliding beds capable of transverse movement
along the faces 12 of the arms 1 and 4, and to which the bevel boxes 14 are
secured. The straining screws 9 work into the tapped heads 13. By the rotation
of the hand wheel 7 acting through its train 8 the beds 11 are caused to advance
or retire from the centre. The bevel boxes 14 are secured to the beds 11 by
pivotal screws 15, about which they are capable of being swung for the purpose
of altering the angle of their axis in relation to the axis of the arms 1 and 4.
16 is a pinching screw for securing the bevel boxes at any required angle and 17 is
a radial slot in the bed thereof, to permit of such swing. 18, 18, 19, 19, are
stop or chock pieces on the face, held in place by dove tail guides 20, and are
capable of vertical movement, 21 are finger pieces. 22 are the metal sides, 23 wooden
guides for saw. 24 saw groove, 25 india rubber or wooden saw guard piece,
26 frame holding screws, 27 overhanging base, 28 angle setting stops, 29 radial
locking bar secured at 30 to arm 4, and locked by screw 31 on arm 1.

page_text: In carrying out the invention each bevel box is set in its approximate position
(relative to the size of the frame to be made) upon the movable bed il by screwing
its pivotal pin 15 into one of the series of holes provided for that purpose, each
bevel box being set at an equal distance from the centre.
The distance measured between the leading edges of each adjacent pair of boxes
determines the size of the frame. Should the correct size not be obtained at the
first setting the hand wheel 7 is rotated to either move the boxes further apart or
draw them nearer to the centre.
If a frame other than that of a square be required, the arms 1 and 4 are swung
round as indicated by the dotted lines till the required size is obtained; the arms
are then locked in their position by the screws 31 pinching the radial locking
bar 29 and the corresponding bevel boxes set at right angles to one another. The
wheel 7 is rotated if necessary to bring the latter to their exact position.
The radial bar 29 may be scribed or marked off at intervals, setting out
proportions, ratios, or angles, and so expedite the setting of the arms.
To cut the bevel on the moulding or such like, a piece of the material to be
worked is laid across the face of two of the adjacent bevel boxes as indicated by
dotted lines on Fig. 3, the stop or chock pieces 18 and 19 being slid up out of the
way to allow the material to bear flat against the face, and if necessary, to further
insure accurate cutting, the moulding is secured in place by forcing the points of
the screws 26 into it.
A saw is inserted in one of the grooves 24 and the bevel is cut with accuracy.
At the end of the cut the teeth of the saw come in contact with the soft bed 25
and are not injured thereby. The saw is next inserted in the groove of the other
bevel box and the second angle cut. Corresponding sides of the frame are cut
preferably from the same bevels. The other sides of the frame are formed in a
similar way.
To secure the pieces of the frame to one another, the stop pieces 18, 18, 19, 19,
are slipped down into place, the sides of the frame are arranged between their
respective bevel boxes, the hand wheel 7 is rotated to advance them towards the
centre and so force the angles tightly together. The corners of the frame are
thus held firmly in place and they are accurately and expeditiously secured
together.
Although I have described and illustrated apparatus for the purpose set out, it
is to be understood that I do not restrict myself specifically to the details of
construction as these may be modified without departing from the principle of the
invention.
Ilaving now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is,―
1. A mitre cutting tool and clamp consisting essentially of arms or limbs provided
with bevel boxes capable of lateral movement along said arms and mechanism for
advancing or retiring the said bevel boxes to or from the centre of the apparatus
sul.stantially as described.
2. A mitre cutting tool and clamp consisting essentially of a pair of arms or
limbs pivoted together at the centre and provided with bevel boxes set on movable
beds and mechanism for advancing or retiring the bevel boxes.in unison with one
another substantially as described.
3. A mitre cutting tool and clamp as set out in the two previous claiming clauses
consisting of arms capable of being swung about a centre to permit of the alteration
of their relative angles so as to permit of the varying of the size of the frame to
be made and provided with locking device to secure the arms in position substan-
tially as described and explained.
4. The construction and arrangement of parts in a mitre cutting tool and clamp
as described and illustrated in Figures 1 to 4 of the accompanying drawings.
5. In a mitre cutting tool and clamping device a bevel box capable of swinging

page_text: upon its own axis to permit of the adjustment of position relative to one or other
of the bevel boxes substantially as described and explained.
6. In a bevel box the combination and arrangement of parts marked as shown
in Figs. 5 to 9 of the drawings.
Dated this 28th day of October 1895.
J. E. EVANS-JACKSON & Co.,
Agents for the Applicant.