Improvements in Spiral Creepers or Conveyors.
Year: 1892

page_text: Date of Application, 29th Dec., 1892
Complete Specification Left, 29th Sept., 1893-Accepted, 4th Nov., 1893
PROVISIONAL SPECIFICATION.
Improvements in Spiral Creepers or Conveyors.
I, THOMAS CASSIÉNET PALMER, of 98, Commercial Road, in the County of
London, Engineer, do hereby declare the nature of this invention to be as
follows:-
:-
This invention relates to improvements in spiral creepers or conveyors for
conveying materials which are liable to clog such as white lead.
Creepers or conveyors for white lead have not been successfully employed owing
to the great difficulty which has been experienced in obtaining a continuous and
regular feed of the lead when in a wet state owing to the clogging of the screw
or worm by the lead forming a coating round the screw or worm which con-
sequently revolves without propelling the lead. I have discovered that by heating
the spiral screw or creeper the adhesion of the lead to the worm or screw is
prevented and I can obtain by this means a continuous and regular feed and travel
of the lead.
The creeper or conveyor can be heated in any suitable manner such for example
as by forming the shaft of the worm or screw, or the worm or screw itself hollow
and admitting steam thereto.
Dated this 29th day of December 1899
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Spiral Creepers or Conveyors.
I, THOMAS CASSIENET PALMER, of 98, Commercial Road, in the County of
London, 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 :-
This invention relates to improvements in spiral creepers or conveyors for
conveying materials which are liable to clog such as white lead.
Creepers or conveyors for white lead have not heretofore been successfully
employed by reason of the great difficulty which has been experienced in obtaining
a continuous and regular feed of the lead when in a wet state owing to the lead
forming a coating around the screw or worm and clogging the same so that it
revolves without propelling the lead. I have discovered that by heating the spiral
screw or creeper the adhesion of the lead to the worm or screw is prevented, and
I can obtain by this means a continuous and regular feed and travel of the lead.
The creeper or conveyor can be beated in any suitable manner such, for example,
as by forming the shaft of the worm or screw, or the worm or screw itself, hollow
and admitting steam thereto.
To enable my invention to be fully understood I will describe the same by
reference to the accompanying drawing, in which :-
Figure 1 is an elevation of a screw-conveyor having the spiral portion made
tubular; and,
Figure 2 is an elevation of a conveyor in which the spiral portion is made
solid.
Similar letters of reference indicate corresponding parts in both figures.
a is the conveyor shaft, and b the spiral portion. In Figure 1 the spiral
portion b is made of a tube and is connected at its ends with the shaft 6 (which

page_text: is also tubular) in such a manner that steam introduced into the said shaft will
flow through the spiral tube b and thence again enter the shaft and pass to a
suitable outlet.
In the arrangement shewn in Figure 2, wherein the spiral portion 6 which is
solid is formed or fixed upon the tubular shaft a, the steam is passed directly
through the shaft a, the spiral portion 6 becoming heated owing to its contact with
the said shaft a.
Instead of using steam it is obvious that the conveyor may be heated by water
or other suitable medium.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. A spiral conveyor for soft or damp materials such as white lead adapted to be
heated by means of steam, hot water or the like for the purpose set forth.
2. A spiral conveyor having its spiral portion made tubular and connected with
a hollow shaft so that steam or other heating medium may be passed through such
spiral portion, substantially as described by reference to Figure 1 of the accom-
panying drawing.
3. A spiral conveyor having a hollow or tubular shaft upon which the spiral
portion of the conveyor is formed or fixed so that it can be heated by steam or
other heating medium passed through the said hollow shaft, substantially as
described by reference to Figure 2 of the accompanying drawing.
Dated this 29th day of September 1893.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.