Improvements in Appliances connected with Bakers' Ovens.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in Appliances connected with Bakers' Ovens.
We, JOHN VICARS, the elder, THOMAS VICARS, and JOIN VICARS, the younger,
all of 56, Seel Street, Liverpool, in the County of Lancaster, Engineers, do hereby
declare the nature of this invention to be as follows:-
This invention relates to bakers ovens in which endless chains are used to carry
trays through the oven and has for its object to prevent damage to the chains or
parts connected therewith, which at present often occurs through variation in the
length of the chains caused by a change of temperature in the oven.
For the above purpose we interpose at any convenient point between the chain
carrying wheels and the wall at either or both ends of the oven a resilient or yield-
ing connection or connections such as springs, weighted levers, pulleys and weights
or equivalent devices, whereby any variation in the length of the chains is taken
up and damage to the chains, or end plates of the oven thereby prevented. Suitable
means are provided for adjusting the tension of the springs or equivalent. devices.
100%
We, JOHN VICARS, the elder, THOMAS VICARS, and JOHN VICARS, the younger,
all of 56, 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 per-
formed, to be particularly described and ascertained in and by the following state-
ment:-
-
This invention relates to bakers ovens in which endless chains are used to carry
trays through the oven and has for its object to prevent damage to the chains or
parts connected therewith, which at present often occurs through variation in the
length of the chains caused by a change of temperature in the oven.
For the above purpose we interpose at any convenient point between the chain
carrying wheels and the wall at either or both ends of the oven a resilient or yield-
ing connection or connections such as springs, weighted levers, pulleys and weights
or equivalent devices, whereby any variation in the length of the chains is taken
up and damage to the chains or end plates of the oven thereby prevented. Suitable
means are provided for adjusting the tension of the springs or equivalent. devices.
Fig. 1. on the accompanying drawings is a longitudinal section partly in eleva-
tion, and Fig. 2 is a plan of one modification of appliances under our invention.

page_text: a is one of the usual idle chain carrying wheels carried in bearings in a frame b,
free to slide on supports c. l is a spring abutting at one end against the frame b
and at the other against the head e of the rod e¹. The rod e¹ is screwed and carries
a nut bearing against the usual end plate of the oven g whereby the tension on
the frame b and chain wheel can be adjusted, at the same time the spring d will
take up any expansion of the chain or allow of the chain contracting without
damage to such chain or end plate of the oven. The other idle chain wheels of the
oven are similarly fitted and if desirable the springs may be fitted in connection
with the driving chain wheels at the other end of the oven in a similar way.
Instead of the springs being in compression they may be arranged to be in tension
if desired.
Fig. 3 is a longitudinal section of another modification. In this case the rod e¹
is attached directly to the frame band the nut f bears against one end of the
spring which is enclosed by a casing d to prevent the spring flying off if it
should break, the other end of the spring abuts against the bottom of the casing d¹
which casing is formed with or attached to the end plate g. The action is the same
as in the preceding modification.
Fig. 4 is a side elevation of a further modification. Here the taking up or
yielding action is obtained by means of weighted levers e¹ pivotted at h to brackets
attached to the support c and connected at to the sliding frame b, d is the weight
on the levers for giving the tension on the chain wheel. If desired the chain
wheels might be carried in bearings attached directly to the. levers e¹ at i.
Fig. 5 is a side elevation of another modification operated by weights. Here the
weights d are connected to the ends of chains e¹ passing over pulleys ; carried on
brackets attached to the end plate g the other ends of the chains being con-
nected to the sliding frame b at i.
The action on the oven chains of the modifications with weights is similar
to that of the modifications with springs. Such weights or weighted levers may
be arranged outside the oven if desired instead of inside as shown.
Like letters indicate like parts in all the views.
We do not confine ourselves to the particular modifications described as it will
be obvious that many arrangements may be made to effect the same result without
departing from the nature of our invention.
Having now particularly described and ascertained the nature of our said
Invention, and in what manner the same is to be performed we declare that what
we claim is:-
First. In bakers ovens having endless travelling chains, interposing between the
chain carrying wheels and the walls of such ovens resilient or yielding connections
substantially as described for the purpose set forth.
Second. In bakers ovens the combinations with the chain carrying wheels of
spring connections arranged within the oven or in casings substantially as described
for the purpose set forth.
Third. In bakers ovens the combination with the chain carrying wheels of
weights and chains or weighted levers forming yielding or taking up connections
substantially as described for the purpose set forth.
Dated this Twenty-eighth day of December 1897.
W. B. JOHNSON,
4, Clayton Square, Liverpool.
Agent.