AN IMPROVED FASTENING FOR FURNACE DOORS
Year: 1885

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J, CHARLES JOSEPH BATES of 13 Bowes Road, Frindsbury, Rochester Kent,
Engineer, do hereby declare the nature of my said invention for AN IMPROVED
FASTENING FOR FURNACE DOORS to be as follows:-
"
My Invention relates to an improved fastening for the doors of furnaces
particularly those of marine engines, whereby the doors will be automatically
locked in the closed or open or any intermediate position thereby avoiding liability
of accident in consequence of the doors being caused to swing by the rolling of the
vessel.
My invention consists in a cross bar pivoted to the front of the door and acting
in combination with a notched boss or ear forming part of the door hinge. The
bar may either act directly as a latch its end entering one of a set of notches made
in one of the fixed bosses or ears on which the door is hung, the notches being so
situated with regard to the latch bar as to hold the door securely in the required
positions. Or a boss or ear may be formed like a clutch and a corresponding
clutch be formed on the end of the pivoted bar, the two clutches engaging together
to hold the door in position or being separated by oscillating the pivoted bar for
the purpose of opening or closing the doors as the case may be.
.
COMPLETE SPECIFICATION.
.
An improved Fastening for Furnace Doors.
I, CHARLES JOSEPH BATES, of 13, Bowes Road, Frindsbury, Rochester Kent;
Engineer, 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:-
My Invention relates to an improved fastening for Marine Furnace doors,
whereby they will be locked when in the open position as well as when closed, the
An improved Fastening for Furnace Doors.
I, CHARLES JOSEPH BATES, of 13, Bowes Road, Frindsbury, Rochester Kent;
Engineer, 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:-
My Invention relates to an improved fastening for Marine Furnace doors,
whereby they will be locked when in the open position as well as when closed, the

page_text: object being to avoid accidents to the stoker by the doors, when opened for stoking,
being caused to swing by the rolling of the vessel.
My Invention consists in a cross bar, pivoted to the front of the furnace door
and engaging directly as a latch, or through the medium of a clutch, with one of
the fixed lugs or ears, on which the door is hinged, the parts entering into engage-
ment both when the door is closed, and when it is open, so as to hold the door
securely in either of those positions.
Reference is to be had to the accompanying drawings, forming part of this
specification ;—wherein, Figure 1. is a front elevation; Figure 2. a vertical section,
and Figure 3. a horizontal section, showing the furnace door closed; and Figures 5.
6. and 7 are similar views showing it open. Figure 4 is a detail, Figures 8. 9. 10.
and 11. are similar views of a modification.
The same letters of reference indicate similar parts in all the Figures.
a is the furnace door, hung by hinge straps and ears b, upon a hinge pin c,
passing through ears or lugs d fixed to the boiler front, all in the usual manner.
fis the pivoted cross bar, or latch of my Invention. It is pivoted at g to the front
of the door a, and projects beyond the edge of the door at each end. The
projecting end forms a handle to move it by and acts also as a counterweight to
throw its opposite end into engagement with the lug d. In Figures 1 to 7 this
engagement is effected by the end of the lever f entering directly one of two
notches cut in the underside of the ear dat opposite sides of the hinge pin c,
both notches being parallel to the boiler front, or otherwise suitably disposed for
the purpose of holding the door in the desired position, substantially as shown.
Referring to Figures 8 to 11. the cross bar f is provided with a clutch which
slides on the hinge pin c, and engages with a corresponding clutch, formed on the
under side of the lug for the purpose of holding the door in either of two
positions as before. The engagement of the lever may be made with the lower
lug e if preferred, the tail end of the lever being, in that case, made to preponderate,
and the lower strap b being, in that case, placed below the lug e.
Having now particularly described, and ascertained the nature of the said
Invention; and in what manner the same is to be performed; I declare that what
I claim is
1. A furnace door fastening, consisting of a lever pivoted to the front of the
door, and engaging with notches in one of the fixed lugs, or ears, upon which the
door is hinged, substantially as herein described, and illustrated in Figures 1. to 7.
of the drawings.
2. A furnace door fastening consisting of a lever pivoted to the front of the
door, provided with a clutch sliding on the hinge pin, and engaging with a
corresponding clutch on one of the fixed ears upon which the door is hinged
substantially as described, and illustrated in Figures 8 to 11 of the drawings.
Dated this 21st day of January 1886