IMPROVEMENTS IN MACHINERY OR APPARATUS FOR HEATING AND DELIVERING METAL BARS
Year: 1869

page_text: PROVISIONAL SPECIFICATION left by Albert Angell and Joseph
John Perry at the Office of the Commissioners of Patents, with
their Petition, on the 16th October 1869.-A communication from
abroad by Samuel A. Darrach, of Newburgh, Orange County, in
the State of New York, United States of America.
We, ALBERT ANGELL, of Rio de Janeiro, in the Empire of Brazil,
but at present of Banbury, in the County of Oxford, and JOSEPH JOHN
PERRY, of Red Lion Square, in the County of Middlesex, do hereby
declare the nature of the said Invention for "IMPROVEMENTS IN MACHINERY
OR APPARATUS FOR HEATING AND DELIVERING METAL BARS," a communication
to us from abroad by Samuel A. Darrach, of Newburgh, Orange County,
in the State of New York, United States of America, to be as follows:-
This Invention consists in the arrangement of a revolving furnace
provided with bell-mouthed holes in its sides, through which the bars
are introduced and covered with a bonnet in combination with a suitable
mechanism for introducing and removing the bars in such a manner
that while the furnace revolves the bars aro heated to a uniform

page_text: temperature and a tender is obtained capable of heating and delivering
metal bars automatically with great rapidity and regularity.
Further in the arrangement of a windlass passing through the interior
of the bonnet and connecting by chains with a ring which catches under
a flange cast solid with the top of the revolving portion of the furnace
in such a manner that said revolving portion can be readily lifted up
into the bonnet and free access to the fire obtained.
Also in the arrangement of a double ratchet on the exterior of the
revolving furnace in combination with a moving and a stop pawl con-
nected together by a pin and cam slot in such a manner that the stop
pawl is automatically raised and depressed by the action of the moving
pawl and the motion is always arrested at the proper moment.
Further in the arrangement of an additional perforated ring which
slides up and down on inclined planes attached to the outside of the
revolving furnace in combination with the holes in the sides of said
furnace in such a manner that when said additional ring is raised
the holes in it form a support for long metal bars, and if the additional
ring is lowered the tongs or spring jaws which serve to withdraw the
heated bars from the furnace can be brought close up to its side, and
the furnace is in condition for heating short bars.
Also in the arrangement of a cone under the feed pipe through which
fuel is introduced into the furnace, and covering the pivot on which the
fire pot revolves in such a manner that on dropping down on said conc
the fuel is evenly and uniformly spread over the grate surface, whilst
the pivot is protected against dust and dirt, and against the direct action
of the fire.
Further in the arrangement of sectional grates supported by eccentric
pivots between rings which can be turned round from the outside of
the furnace and resting upon stationary ribs in such a manner that by
imparting to said ribs a short reciprocating movement the fire is readily
cleaned, and by moving the rings far enough in one and the same
direction the grates are simultaneously set free and the fire is dumped.
Also in the arrangement of cams and cam grooves in combination
with the feed box containing the blanks in such a manner that an
automatic shaking motion is imparted to said feed box, and the blanks
are caused to drop without fail into the feed channel. The top of the
fire pot is perforated to provide for the escape of the products of com-

page_text: bustion, and said fire pot is supplied with fuel through a funnel which
is cast solid with or otherwise rigidly attached to the perforated top.
The bars or blanks to be heated are placed in a box, to which a trans-
verse shaking motion is imparted by means of a cam groove which acts
on a bell-crank lever, and by this motion the feed box is carried over
the feed channel in the platform which supports the box. In said feed
channel is fitted a pusher, to which a reciprocating motion is imparted
by a cam, and the rotary motion of the fire pot is so timed that one of
the holes in its sides comes opposite the feed channel whenever the
pusher begins to move forward, and the bar which has been deposited in
the feed channel is pushed into the hole of the fire-pot. As the motion
of the apparatus progresses one lole after the other receives its bar, and
each bar is carried round with the fire pot until it arrives opposite the
discharge mechanism; during this time the bar is heated. The dis-
charge mechanism consists of two spring jaws which are pivotted to a
slide to which a reciprocating motion is imparted by a cam. This cam
acts on a pivot which projects from a secondary slide situated on the
top of the main slide, and the inner end of which forms a wedge.
In moving away from the fire pot the two slides are connected together
by a spring latch which is secured to the main slide, and which catches
over a pin projecting from the secondary slide, and in moving up to the
fire pot the two slides are connected together by a second spring latch
which is attached to the main slide and catches over a second pin pro-
jecting from the secondary slide. When the main slide has reached the
rear end of its stroke the spring latch on the main slide strikes a stop
and the secondary slide is disengaged, so that it can move back far
enough to withdraw the wedge from between the shanks of the jaws,
and said jaws are thrown open by the action of their springs. At the
same time the second pin is thrown under the second latch and both
slides begin their inward stroke in conjunction, but when the jaws have
come close up to the periphery of the fire pot the second latch strikes
against a stop, whereby it is raised so as to disengage the secondary
slide from the main slide, and as the motion of the cam proceeds the
secondary slide continues its motion and the wedge is forced between
the shanks of the jaws, causing them to close upon the bar which
projects from the fire pot, and which at that moment has arrived in the
proper position to be grasped by said jaws. After the jaws have been
closed upon the bar the two slides recede, having been locked together
by the first-mentioned latch, and the heated bar is withdrawn from the

page_text: furnace. When the main slide has reached the rear end of its stroke
the secondary slide recedes still further, as previously described, the
wedge is withdrawn from between the shanks of the jaws, the jaws open,
and the bar drops down on to a conductor leading to a bolt heading or
rivet machine, or to any other mechanism by which said heated bars 5
are to be further operated upon.