Improvements connected with the Doors of Bakers' Ovens, and of other Ovens, Stoves and Furnaces.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Improvements connected with the Doors of Bakers' Ovens, and of
other Ovens, Stoves and Furnaces.
We, THOMAS PERRY and GEORGE PERRY, trading together in co-partnership
as T. and G. Perry, of 5, Gough Street, Wolverhampton, in the County of Stafford,
Builders and Contractors, do hereby declare the nature of this invention to be as
follows:-
This invention has for its main object improved means for use in operating
doors of bakers' ovens, and other ovens, stoves, and furnaces, and has for a further
object means for tightening the doors of bakers' ovens back against the faces
of the door frames, such latter means being applicable also, if required, to
tightening back against their frames the doors of other ovens, stoves, or furnaces.
The improved means for use in operating the door of a bakers' oven, or other
oven, stove, or furnace, comprise, according to this invention, chains passing up
from or near opposite ends of the door, a single pulley mounted in a manner
which enables it to turn around a fixed axis in a plane parallel with that of the
face of the door, a double pulley also mounted in a manner which enables it to
turn around a fixed axis in a plane parallel with that of the face of the door, and
a hanging or counterbalance weight at one side of the door which operates
through the chains and thereby balances, or approximately balances, the weight
of the door. One of the chains passes over the single pulley, thence across the face
of the oven, stove, or furnace, and over one of the divisions of the double pulley,
and thence down to a connection with the hanging weight; and the other chain is
connected with the other division of the double pulley. If the weight is moved
downwards or upwards the door is, of course, opened or closed; and the arrange-
ment of chains and pulleys with the single weight ensures that the door will always
remain horizontal, or substantially so, as it is being moved and into whatever
position it is moved. It is preferred to suspend the weight inside a shield or
casing which has a slot formed through the front, and to operate the weight
by means of a handle which projects therefrom through the slot.
The means, according to this invention, for tightening back the door of a baker's
oven, or other oven, stove, or furnace, against the frame, consist of a transverse
spindle having a handle at any convenient point therealong, preferably at the
middle, which is carried in bearings at the front face of the door, and is formed or
provided at its ends with excentrics or cams which pass behind the fronts of
grooves within which the door moves vertically, and which, as the spindle is
turned in one direction are pressed against the inner faces of the outer sides of
such grooves and thus tighten back the door against the frame, but which as the
spindle is turned in the opposite direction leave the door loose.
Dated this 7th day of December 1899.
STEPHEN WATKINS & GROVES,
Wolverhampton,
Agents for the Applicants.

page_text: Improvements connected with the Doors of Bakers' Ovens, and of
other Ovens, Stovesland Furnaces.
We, THOMAS PERRY and GEORGE PERRY, trading together in co-partnership
as T. and G. Perry, of 51, Gough Street, Wolverhampton, in the County of Stafford,
Builders and Contractors, 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 main object improved means for use in operating
doors of bakers' ovens, and other ovens stoves and furnaces, and has for a further
object means for tightening the doors of bakers' ovens back against the faces
of the door frames, such latter means being applicable also, if required, to
tightening back against their frames the doors of other ovens, stoves, or furnaces.
The improved means for use in operating the door of a baker's oven, or other
oven, stove, or furnace, comprise, according to this invention, chains passing up
from or near opposite ends of the door, a single pulley mounted in a manner
which enables it to turn around a fixed axis in a plane parallel, or nearly so, with
that of the face of the door, a double pulley also mounted in a manner which
enables it to turn around a fixed axis in a plane parallel, or nearly so, with that
of the face of the door, and a hanging or counterbalance weight at one side of the
door which operates through the chains and thereby balances, or approximately
balances, the weight of the door. One of the chains passes over the single pulley,
thence across the face of the oven, stove, or furnace, or across the plane in which
such face lies, and over one of the divisions of the double pulley, and thence down
to a connection with the hanging weight; and the other chain is connected with
the other division of the double pulley. If the weight is moved downwards or
upwards the door is, of course, opened or closed; and the arrangement of chains
and pulleys with the single weight ensures that the door will always remain
horizontal, or substantially 80, as it is being moved and into whatever position
it is moved. It is preferred to suspend the weight inside a casing, and the weight
(and consequently the door) may be operated by means of a handle which projects
therefrom through a slot formed through the front of the casing.
The means, according to this invention, for tightening back the door of a
baker's oven or other oven, stove, or furnace against the frame, consist of a trans-
verse spindle having a handle at any convenient point therealong, preferably at
or near the middle, which is carried in bearings at the front face of the door,
and is formed or provided at its ends with excentric or cams which pass behind
the fronts of grooves within which the door moves vertically or pass behind lugs
or portions of brackets, which project from the door frame, and which excentrics
or cams, as the spindle is turned in one direction, are pressed against the inner
faces of the outer sides of such grooves or against the inner faces of the lugs, or
the parts of brackets, behind which they pass, and thus tighten back the door
against the frame, but which, as the spindle is turned in the opposite direction,
leave the door loose.
In order that the invention may be clearly understood, we will now describe a
convenient practical application thereof by reference to the accompanying draw-
ings, of which, Figure 1 is a front elevation of a baker's oven front embodying our
improvements, Figure 2 is an end elevation of the front shewn by Figure 1.
Figure 3 is a vertical section taken on line of Figure 1; and Figure 4 is a
longitudinal section taken on line y y of Figure 1.

page_text: Trame B are of the usual or any convenient construction, and it
is preferred to form the face against which the door slides somewhat slanting, as
shewn, and as has been previously practised, to ensure that the door will always
lie snugly against the face.
upon a stud c projecting forwards from the upper part of one side of the frame,
A pulley C is mounted to be capable of turning
and a double pulley DD' is mounted to be capable of turning upon a stud d
which projects forwards from the upper portion of the other side of the frame.
A chain e, which is connected at one end with one side or end of the door A,
passes up over the pulley C, thence over the division D of the double pulley, and
0 thence down to a weight E (shewn in Figure 1 by broken lines only) with which
it is connected; and a chain f is connected at one end with the other side or end
of the door and is connected at its upper end with the periphery of the division D'
of the double pulley, the division D of the double pulley should be pitched to
correspond with the pitch of the chain links, as the double pulley must be
positively operated by the chain e as the weight is lowered and raised; and, it is
preferred that the division D¹ of the double pulley, and that the pulley C, also,
shall be pitched to suit the pitch of the chain. The weight E hangs inside a
casing F formed as a portion of the oven front, and for ready manipulation a
handle-bar g projects from the weight through a vertical slot h formed through
the front of the casing. By means of this handle-bar the weight may be lowered
and raised, and the oven door thus opened and closed. Obviously the chain e may
be connected at one end with the division D of the double pulley, and the chain f
pass over the division D' of such pulley and be connected with the weight if such
should be desired.
A horizontal spindle G is carried in bearings a at the front of the door, and the
ends of this spindle project somewhat beyond the ends of the door and are formed
as, or provided with, excentrics or cams b, which as the door is closing pass down
behind lugs i of brackets H which project forwards from the frame B.
spindle G has a handle J by means of which it may be turned about a half turn;
and the handle is in such position, in relation to the excentrics b, that when the
The
excentrics have passed down behind the lugs i the movement of the handle through
a half turn, or somewhat less, will cause the excentrics to press so tightly against
the lugs i as to ensure that the door will be pressed and held firmly against the
face of the frame.
The door is guided by means of sliders k fixed to the sides of the door, which
lide, as the door is moved, along the sides of the oven mouth and along the
pwardly extended portions m thereof.
Having now particularly described and ascertained the nature of our said
nvention, and in what manner the same is to be performed, we declare that what
e claim is;
1. The door of a baker's or other oven stove or furnace connected, at or near one
de or end, with a weight which hangs at one side of the door, by means of a
ain which passes up and over a pulley and thence in a sideway direction above
e top of the door and over one division of a double pulley which is situated
ove the other side or end of the door, and thence down to a connection with
e weight, and connected at its other end or side with the other division of the
uble pulley by means of a chain which is fastened to such division but does not
ss down to the weight, substantially as described, and also the alternative
rangement, substantially as described, in which the first-mentioned chain is
nnected to the double pulley and does not pass down to the weight.
2. The means whereby the weight of the door of a baker's oven or other oven
ve or furnace is counterbalanced or substantially so and the door is raised and
vered, substantially as described and shewn by the drawings herewith.
3. The use of excentries or cams for tightening the door of a baker's oven or of
er oven stove or furnace against its frame, substantially as described.

page_text: 4. The means for tightening the door of a baker's oven or other oven stove
or furnace against its frame, substantially as described and shewn by the drawings
herewith.
Dated this 5th day of September 1900.
STEPHEN WATKINS & GROVES,
Chartered Patent Agents,
Wolverhampton,
Agents for the Applicants.