An Improved Combination Safety Steam Cock and Door Latch.
Year: 1898

page_text: Date of Application, 21st Oct., 1898
Complete Specification Left, 21st July, 1899-Aecepted, 7th Oct., 1899
PROVISIONAL SPECIFICATION.
An Improved Combination Safety Steam Cock and Door Latch.
GEORGE EDWARD KILLICK and GEORGE WALKER COCHRAN, of 51
and 53,
Seel Street, Liverpool, in the County of Lancaster, Ironfounders and Engineers,
do hereby declare the nature of this invention to be as follows:-
.
This invention relates to a combination door latch and steam cock for use in
connection with food steamers or cookers and is so contrived that it is impossible
to open the door of the chamber without having first shut off the steam."
The spindle of the cock controlling the steam inlet is prolonged and brought
out through the front of the steamer in close proximity to the top edge of the
door or other suitable position. To this prolonged spindle we secure a latch to
engage the rim of the door and a suitable handle preferably in line with the said
latch and both forming an integral part with the cock spindle.
When the door of the steamer is closed and steam turned on by means of
rotating the handle the latch is simultaneously brought in front of the door,
thus effectually keeping the compartment closed while the cock is in the open
position.
Similarly, to allow the opening of the door the cock spindle carrying the latch
must first be partially rotated thus shutting off the steam, the latch at the same
time being swung clear of the door allowing it to open freely.
Dated this Thicktoonth
1000
GEO. E. KILLICK.
GEO. W. COCHRAN.
COMPLETE SPECIFICATION.
An Improved Combination Safety Steam Cock and Door Latch.
-
We, GEORGE EDWARD KILLICK and GEORGE WALKER COCHRAN, of 51 and 53,
Seel Street, Liverpool, in the County of Lancaster, Engineers, 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 has for its object a combination door latch and steam cock for
use in connection with food steamers or cookers, and is so constructed that it is
impossible to open the door of the chamber without having first shut off the
steam.
The invention will be best understood by reference to the accompanying draw-
ings in which the same reference letters are used to denote like parts of the
annaratus.

page_text: Figure 1, shews a perspective view of a steamer with the safety catch attached
thereto, the door of the steamer being closed.
Figure 2, shews a similar view with the catch swung clear and the door
opened.
Figure 3, is an enlarged detail perspective view of the catch.
Figure 4 shews our invention applied to a steaming pan, and Figure 5 is a
plan view of Figure 4...
In these figures E is the outside casing of an ordinary food steamer. D the
door of same, which is closed when food is about to be cooked in the chamber
and screwed up by means of the hand wheel F or otherwise rendered steam tight.
A is the lengthened spindle of an ordinary steam stop cock which admits steam
to the interior of the compartment. This lengthened spindle A is brought out
through the front of the casing E preferably near the head of the door D, as
shewn and has attached to it the handle C by rotating which the said steam
inlet cock is controlled and steam turned on or off.
The door D having been closed and screwed up, steam is then turned on by
rotating the handle C from the position shewn in Figure 2 to the downward
position shewn in Figure 1. The lip B which is held securely clamped to the
spindle A and handle C by the bolt G has likewise been rotated into a position
in front of the top rim d of the door, which latter is thus held closed so long as
the handle C remains in the downward position or while live steam is in the
compartment. It will thus be impossible to open the door without having first
swung the lip B clear or cut off steam.
The catch is preferably made in the manner shewn in Figure 3, the lip B
being provided with a distance collar 6 to ensure the lip engaging the-door rim
accurately. The position of the latch may be at the side or bottom of the com-
partment, or the lip B may take into a groove or slot in the door instead of
engaging the front of the door rim as shewn in the drawings. The invention
may also be applied to locking the lids of steaming pans as shewn in Figures 4
and 5, or any similar apparatus where it may be desirable or necessary that steam
should be cut off before the apparatus can be opened. Serious accidents arising
from the negligence or forgetfulness of an attendant are thus prevented.
Having now particularly described and ascertained the nature of our
invention and in what manner the same is to be performed, we declare that what
we claim is: -
1.) A safety latch for the door of a steaming chamber formed by attaching to
the spindle controlling the steam inlet to the said chamber, a lip or latch, which
lip or latch simultaneously locks or releases the said door as steam is turned on
or off.
2.) The improved door latch consisting of the door engaging lip B and dis-
tance collar and controlling handle C all mounted on the spindle A substan-
tially as described and shewn with reference to the accompanying drawings.
3.) A revoluble latch for the door of a food steamer consisting of a lip arranged
and mounted on the steam inlet cock spindle so as to lock or release the said door
synchronously with the turning on or off of steam substantially as described.
Dated this 20th day of July 1899
GEO. E. KILLICK.
GEO. W. COCHRAN.