An Exhauster for Taking away the Dust and Shavings from Wood-planing and other Machines.
Year: 1886

page_text: Date of Application, 23rd July, 1886.
Complete Left, 14th Apr., 1887.
Complete Accepted, 20th May, 1887.
RESERV
An Exhauster for Taking away the Dust and Shavings from
Wood-planing and other Machines.
JOHN RAWLINGS of 78 Hackney Road London E. Specialist in Machinery and
Saw Mill Matters do hereby declare the nature of this invention to be as follows:-
I make a conical Trunk cover formed of sheet rolled metal or light casting which
drops completely over the cutter of the machine and is temporarily fixed by means of
flanges made to fit over the pressure bars of the machine or other convenient parts.
The conical Trunk cover and the pressure bars to which it is attached form a dust
tight chamber which is open only at the ends the smaller end for the inlet of air and
the larger end for the outlet of shavings and dust.
When the machine is set in
A current of air is admitted
The action of the Exhauster is secured as follow.
motion the blades of the cutter become a powerful fan.
through the smaller end of the cone which is caught by the fan or cutter and driven
with force to the upper and larger part of the cone and from thence carrying all
shavings and dust into another chamber of larger size which larger chamber stands
vertically and immediately over a corresponding hole cut in the floor through which
the shavings and dust fall into the chamber below. The vertical chamber is made
tapering larger downwards to prevent choking by the shavings.
T1 22 1 1000
JOHN RAWLINGS.

page_text: An Exhauster for Taking away the Dust and Shavings from
Wood-planing and other Machines.
JOHN RAWLINGS of 78 Hackney Road London, E. Specialist in Machinery and
Saw Mill Matters 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:-
I make a taper trunk cover formed of sheet rolled metal or light casting or other
convenient material which I drop completely over the cutter of the machine and
temporarily fix the same to the pressure bars by means of flanges formed in the cover.
The trunk cover, the pressure bars, and the wood under operation together form a
dust tight chamber which is open only at the ends. The smaller end for the inlet of
air, and the larger end for the outlet of dust and shavings.
I insert at the outlet of the Exhauster or cover a partition the lower part of which
is placed against the bearing of the machine to conduct the shavings over the same and
towards the mouth thereby preventing the shavings from beating against any
obstruction.
When the exhauster is required for a machine in which there are no pressure bars
I use as a substitute any adjacent and convenient part of the machine whereby to fix
the cover in its required position.
Figure 1 of the accompanying drawing shows a front view of my Exhauster and
Figure 2 is a side view of the same.
A. A represent the pressure bars of the planing machine to which the cover B
is fixed by the flanges C. C. bent in the same. E represents the wood being planed.
A A, B, and E form the dust tight chamber open only at the ends G and B. Dis
the cutter the four blades of which are represented throwing the shavings upward in
the direction of the arrow and are caught by the current of air which is going in the
direction of the arrows G and B and are then driven into the chamber H. F shown
by the dotted line represents the partition which directs the shavings over the bearing
of the machine to the outlet B.
The action of the Exhauster is secured in the following manner. When the machine
is set in motion the blades of the cutter become a fan. A current of air is admitted
through the small end of the cover which is caught by the fan or blades and is driven
with the shavings with force towards the upper part and larger end of the cover and
from thence into the other and larger chamber which is also formed of sheet metal
or other convenient material. The larger chamber stands vertically or obliquely over
a corresponding hole in the floor as may be required.
To prevent the shavings from choking the vertical or oblique chamber I make it
increasingly larger downward to the lower end.

page_text: If there be no convenience for a chamber under the floor for the reception of
shavings I construct the larger chamber on legs so that the shavings may be removed
from underneath as may be required or if the machine should stand near a wall or
partition of the mill the shavings may be driven through a hole in the same thus
dispensing with the vertical chamber.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed I declare that what I claim is
First The construction of a Trunk cover with a partition in same to form a free
outlet and so constructed as to be used as the casing of a fan or Exhauster for driving
away the shavings clear from planing and other similar machines substantially as set
forth and shown in the drawings.
Second: The construction of a vertical or oblique chamber in continuation of the
cover increasing in size downwards with or without legs substantially as set forth and
shown in the drawings.