IMPROVEMENTS IN THE MEANS OR APPARATUS EMPLOYED FOR TEMPERING HACKLE, GILL, COMB, AND CARD PINS OR TEETH, SUCH INTION
Year: 1882

page_text: LETTERS PATENT to Thomas Crabtree, of Leeds, in the county of York,
for an invention of " IMPROVEMENTS IN THE MEANS OR APPARATUS EMPLOYED
FOR TEMPERING HACKLE, GILL, COMB, AND CARD PINS OR TEETH, SUCH INVENTION
PROVISIONAL SPECIFICATION left by the said Thomas Crabtree at the
Office of the Commissioners of Patents on the 25th February 1882.
THOMAS CRABTREE of Leeds in the County of York "IMPROVEMENTS IN THE
MEANS OR APPARATUS EMPLOYED FOR TEMPERING HACKLE, GILL, COMB, AND CARD
PINS OR TEETH, SUCH INVENTION BEING ALSO APPLICABLE FOR TEMPERING SPRINGS
AND OTHER ARTICLES FORMED OF STEEL.'
"
I construct a furnace by preference of an oven shapo and lined with fire brick,
and provide a cylinder or barrel either of a corrugated form or having projecting
pieces in its interior. This barrel is for the reception of the articles to be treated,
and is suspended in the oven over the fire; the bearing at one end consists of a
metal cup attached to the extremity of a sliding shaft and projecting within the
furnace. The bearing of the other end consists of an air open bush which is fitted
into the side so as to revolve freely when required.
Through this bush the operator has direct access to the interior of the barrel or
cylinder whilst the tempering is proceeding. This opening may be closed at
pleasure by a suitable cover. In order to retain the barrel in its position and to
provide means whereby such barrel may be readily relieved from its bearings and
withdrawn from the oven. I arrange the shaft so that by the action of a lever it
may be caused to move inwards or outwards; the former for the purpose of
supporting the barrel in its cupped end and the latter for liberating it so that it
may be free to be withdrawn by the attendant. I also during the tempering
process impart a rotary motion to the shaft for the purpose of agitating the pins
teeth or other articles, such agitation being assisted by the corrugated form or
projecting pieces in the interior of barrel. In connection with this apparatus I
employ a pyrometer or heat tester.

page_text: In order to retain the cylinder or barrel g in position and to provide means
whereby the same may readily be relieved from its bearings and drawn from the
oven. I arrange the shaft or spindle k in its bearings so that by the action of the
spiral spring e it is moved inwards and by the action of the lever or treadle o
through the medium of the link p and levers r, it may be moved inwards or
outwards, the former for the purpose of supporting the barrel or cylinder g in the
metal cup i and the latter for liberating it so that it may be freely withdrawn by
the attendant. The object of rotating the cylinder or barrel g during the operation
of tempering is for the purpose of agitating the pins, teeth or other articles, such
agitation being greatly assisted by the corrugated form or projecting pieces in the
interior.
In connection with this apparatus I employ the pyrometer 8 for testing the
heat of the furnace.
And I further employ an apparatus for regulating the time with accuracy
required for exposing the articles to the boat. For this purpose I provided a dial t
on which is fitted a moveable or adjustable stop u in connection with an electric
bell arrangement. In front of the dial plate is provided a pointer v mounted on
an insulated spindle w which is connected with a wire from the battery in
connection with an electric bell. As the operation of rotating the cylinder or
barrel g is proceeding. I cause the pointer to revolve slowly by means of the
worm and worm wheel y actuated from the shaft or spindle k through the
friction pullies and 2 or their equivalents. The hand or pointer v continues its
course round the dial until it comes in contact with the adjustable stop u closing
the circuit for the electric current and ringing the bell, which gives warning to
the attendant. That part of the stop to which the battery wire is connected and
which comes in contact with the pointer is insulated from the rest of the stop.
The required heat may be obtained from coke or other suitable fuel or means.
Having now described the nature of my said Invention and particularized the
same by details which answer well in practice. I would have it understood that
I do not confine myself to the exact details setforth; what I do claim are:-
The general arrangement and combination of the various parts forming the
apparatus for tempering hacklo-gill-comb-and card pins, also other articles formed
of steel substantially as herein set forth.
The means employed for ascertaining and registering the heat in combination
with the apparatus for tempering and timing the operation substantially as herein
set forth.
In Witness whereof I the said Thomas Crabtree have hereunto set my
hand and seal this eighteenth day of August in the year of Our Lord one
thouse eight hundred and eightytwo.