IMPROVEMENTS IN FINISHING AND DRESSING HINGES, AND IN APPARATUS OR MACHINERY TO BE EMPLOYED THEREIN
Year: 1878

page_text: LETTERS PATENT to Charles Louis Boyce, of Birmingham, in the County of
Warwick, Manufacturer, for the Invention of "IMPROVEMENTS IN FINISHING
AND DRESSING HINGES, AND IN APPARATUS OR MACHINERY TO BE EMPLOYED
THEREIN."
Sealed the 16th July 1878, and dated the 25th January 1878.
PROVISIONAL SPECIFICATION left by the said Charles Louis Boyce at the
Office of the Commissioners of Patents on the 25th January 1878.
"
CHARLES LOUIS BOYCE, of Birmingham, in the County of Warwick, Manufacturer..
IMPROVEMENTS IN FINISHING AND DRESSING HINGES, AND IN APPARATUS OR
MACHINERY TO BE EMPLOYED THEREIN."
This Invention has for its object the finishing and dressing of hinges by machinery.
instead of hand labour; one form of machine which I employ is constructed on the
principle of a milling machine, but with rotary cutters specially adapted to my.
purpose; these are formed and arranged so that any suitable number of them being
hung upon one spindle, certain of them are adapted to the flap of the hinge, and
others to the joint.
The castings of the two parts of the hinge are laid back to back, the edges up-
wards in a groove, or holding clip in the sliding bed of the machine; the clip is
then advanced until it is brought under the operation of one of the cutters, which,
revolving rapidly, trims the edges of both halves; one half is then taken separately
and similarly held in a clip in such position that it can be advanced under cutters,
arranged to clear the gaps, and at the same time to trim the ends. The joint is
then drilled and pinned, and the two parts are closed, and in that state placed again
in a clip in the slide in such position, that when brought under the cutter grooved
for the purpose, the back of the joint is operated upon. I then open the hinge and
lay it on its back in the slide, and bring the front under the cutters which dress the
flaps and the front of the joint. A similar arrangement of lapsrevolving upon a
spindle is then employed to polish the hinge.
;

page_text: The rotary cutters I have named may be close cut as files, or with open saw teeth,
and the castings of the hinge may be either in the requisite lengths for each part, or
in continuous strips; the length of several hinges and these strips may be operated
upon by the cutters, and then cut up into lengths required for each.
I can also employ in place of a milling machine, a planing machine, the cutting
tools being of course adapted to the section of the hinge.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Charles Louis Boyce in the Great Seal Patent Office on the 24th
July 1878.
CHARLES LOUIS BOYCE, of Birmingham, in the County of Warwick, Manufacturer.
'IMPROVEMENTS IN FINISHING AND DRESSING HINGES, AND IN APPARATUS OR
MACHINERY TO BE EMPLOYED THEREIN."
This Invention has for its object the finishing and dressing of hinges by
machinery, instead of hand labour.
The form of machine which I prefer to employ is constructed on the principle of
a milling machine, but with rotary cutters specially adapted to my purpose; these
are formed and arranged so that any suitable number of them being hung upon
one spindle, certain of them are adapted to the flap of the hinge, and others to the
joint.
The castings of the two parts of the hinge are laid back to back, the edges up-
wards in a groove or holding clip in the sliding bed of the machine; the clip is then
advanced until it is brought under the operation of one of the cutters, which re-
volving rapidly, trims the edges of both halves; one half is then taken separately,
and similarly held in a clip in such position, that it. can be advanced under cutters
arranged to clear the gaps, and at the same time to trim the ends. The joint is then
drilled and pinned, and the two parts are closed, and in that state placed again in a
clip in the slide in such position, that when brought under the cutter grooved for
the purpose, the back of the joint is operated upon. I then open the hinge and lay
it on its back in the slide, and bring the front under the cutters which dress the
flaps and the front of the joint. A similar arrangement of laps revolving upon a
spindle is then employed to polish the hinge.
The rotary cutters I have named may be close cut as files or with open saw teeth,
and the castings of the hinge may be either in the requisite lengths for each part, or
in continuous strips the length of several hinges, and these strips may be operated
upon by the cutters, and then cut up into the lengths required for each.
DESCRIPTION OF THE DRAWINGS.
Figure 1 represents the machine in front elevation, and Figure 2, in side eleva-
tion.

page_text: Figures 5 and 6, the tools for completing the dressing of the joints when the flaps
are closed.
Figures 7 and 8, the tools used for gapping one part of the hinge, and Figure 9,
those for gapping the counterpart.
a is the frame of the machine carrying the spindle (b) and driving pulleys (c),
(d), the spindle (b) carrying the tools or revolving cutters (e); (f) is a second
spindle driven by a band from the pulley (d), over the pulley (g), and thus driving
through bevil wheels (h) and worm-gearing; the shaft (i).and spindle (j) which is
in connection with the sliding bed (k), which the action thus caused to traverse
across the machine beneath the revolving cutters (e); (C) is a screwed shaft beneath
the sliding bed (k), and by which its proximity to the cutters is regulated. The
return motion of the sliding bed is effected by the winch handle (m).
The action of the machine with all the tools being the same, it will suffice for me
to explain its action with one set. Taking then those cutters shewn in Figures 3
and 4, I employ a clip or holder (o), in which are placed the castings for the hinges
(p), when the holder is placed in the sliding bed (k) by the dovetailed grooves (r);
the revolving cutter (e) is then hung on the spindle (b), and the sliding bed with
the hinge upon it is advanced towards the cutter by working the screwed shaft (1),
by which its vertical position is governed, and the machine being set in motion, the
sliding bed traverses the machine beneath the revolving cutters, and the surfaces of
the hinge exposed to the cutters are reduced and dressed, which being done, the
cutters are changed, and the position of the parts of the hinge, and another part is
dressed and so on, until the parts are ready for drilling and pinning.
Instead of employing one machine, I can use separate machines, each fitted with
different tools if desired, thus avoiding delay in changing the tools.
In the operation of drilling, I have found that instead of employing one drill
which is obliged to have a reversing motion in order to clear itself, and which is
liable to frequent breakage by reason of its length, it is preferable to use two drills
of shorter length, and mounted so as to be advanced towards a common centre, by
which no reversing motion is required and breakage is avoided. The hinge is then
subjected again to the action of the cutters in manner already described, by which
the backs and fronts of the hinges are dressed. Revolving laps instead of cutters
may then be employed for polishing. the hinge.
Having thus described the nature of my said Invention, and in what manner the
same is to be performed, I claim;-
.
Firstly. The several improvements in finishing and dressing hinges by means of
apparatus designed to work rotating cutters over the surfaces of the hinges or parts
of hinges, brought under their action by a traversing or sliding bed, as herein
described.
And, Secondly. I claim the drilling of hinges by means of a double acting drill,
the drills working in one direction towards one common centre, substantially as
herein more fully set forth and specified.
In witness whereof, I, the said Charles Louis Boyce, have hereunto set my
hand and seal, this Twenty-second day of July, in the year of our Lord
One thousand eight hundred and seventy-eight.
CHARLES LOUIS BOYCE. (L.S.)