Improvements relating to Boiler Furnace Doors and the like.
Year: 1897

page_text: Date of Application, 13th Dec., 1897-Accepted, 15th Jan., 1898
COMPLETE SPECIFICATION.
Improvements relating to Boiler Furnace Doors and the like.
I, ROBERT WILLIAM STOKOE, of 5, Dunwoodie Terrace, Hexham, in the County
of Northumberland, Engine Fitter, 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 relates to an improved means of fastening marine and other boiler
furnace doors, and can be applied to existing doors by making very slight altera-
tions to them.
«
The improvement consists in a sneck," latch, bar lever, or fastener which
normally lies approximately in a horizontal position across the door. It is longer
than the width of the door, and pivoted on the door at a point preferably inter-
mediate between the middle and the hinge of the door. In one piece with or fixed
to the hinge bracket and concentric with the hinge pin which passes through it
is a boss or quadrant provided with a number of notches or slots into which the
end of the sneck falls when the door is opened or closed. When the door is closed
the sneck at one end fits into a notch and at the other end into an ordinary catch
piece fixed to furnace front. By arranging the number and position of the notches
in the quadrant the door may be kept open in any required position, the sneck
being so balanced or weighted that it automatically tends to lift its shorter arm
into a notch unless the opposite end is held or lifted up. The shape of the sneck
may be varied to suit particular cases and may work between the furnace door
front and the baffle plate, or outside the door front.
In the annexed drawings:-Fig. 1 shows the general arrangement of such a
door and furnace front. Fig. 2 and 3 enlarged elevations and plan of sneck and
hinge bracket. A is the sneck, B the pivot or fulcrum on the door, C a catch
piece fixed on the furnace front, D the hinge Bracket E the quadrant or boss, F
notches therein, H a handle on the sneck, Ġ a hinge pin, J the door, and K the
furnace front.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed I declare that what I claim is;-
1. The combination with a boiler furnace door of a latch extending across said
door and pivoted between its ends thereon, a catch for one end of said latch and a
quadrant or projecting flange near the pintle of the door having recesses to receive
the other end of said latch which latch is so weighted or balanced as to tend to
engage said recesses and catch.
2. The combination with a furnace front of a catch thereon, a lug or lugs to
receive the door pintle and a projecting flange concentric with the pintle having
in its lower face a series of recesses, of a door and pintle therefor and a latch

page_text: pivoted on said door nearer the hinge thereof and extending across the latter to
engage with its longer arm in the catch and its shorter arm in one of the recesses
in the flange substantially as and for the purpose herein described.
Dated this 13th day of December 1897
HERBERT HADDAN & Co.,
Agents to Applicant, 18, Buckingham Street, Strand, London.