Improvements in the Feed-changing Mechanism for Wood and like Planing Machines.
Year: 1896

page_text: A
Date of Application, 7th Oct., 1896
سلسل 2
1907
Accented 14th Aud
1897
Date of Application, 7th Oct., 1896
Complete Specification Left, 3rd July, 1807 Accepted, 14th Aug 1897
PR VISIONAL SPECIFICATION.
Improvements in the Feed-changing Mechanism for Wood and like
Planing Machines.
I, ANDERS AUGUST WESTMAN, of Gamla Kungsholmsbrogatan 21, Stockholm,
Sweden, Mechanical Engineer, do hereby declare the nature of this invention to
be as follows:-
This invention relates to an improvement in the feed-changing mechanism in
planing machines, provided with rollers for holding down and feeding forward
the board that is to be planed and the object of the invention is to provide an
arrangement by means of which the position of the said rollers may be ascertained
and changed to suit a certain thickness of board that is to be planed without any
experiment or trial, and when so adjusted to be held in that position in such a
way that the strain and weight is taken off the mechanism by means of which the
raising or lowering of the rollers is effected.
The invention consists in providing the lifting shaft (on which, in the usual
manner, the chains which carry the top-feeding rollers are wound) with a worm
gear in which meshes a worm. The shaft for said worm is in its turn provided
with a bevel gear wheel which meshes with another bevel gear wheel provided
with a crank and handle for the turning of the same. The end of the said lifting
shaft is provided with a dial which runs over and points at a scale provided with
marks corresponding to the different thicknesses of board that may be called
for in planing; and below the said scale in an opening, groove or the like, whose
radius is somewhat smaller than the length of the dial, is fixed a bolt, shoulder or
the like, which may be fastened anywhere in said opening so that the dial may
rest against the same in such manner that the strain of holding up the rollers is
taken off from the said worm and bevel gear.
The invention is illustrated by the accompanying drawing in which is shown a
side elevation of a portion of a planing machine provided with this invention.
Referring to the drawing a represents the frame of the planing-machine.
The lower feeding rollers b, b' are journaled in the said frame in the usual
manner and the upper feeding rollers e, e', are hinged above on the
The upper
stationary axle or shaft c by means of the arms d, d¹.
feeding rollers are held up by means of bars f, fl which, as well known,
are joined by their lower ends to a crosspiece g, which hangs in one end of chains /,
the other end of said chains being so fixed to the lifting axle i that the chains are
wound on to it when it is turned. The said lifting axle i is provided with a worm
gear wheel k with which meshes the worm the shaft of which is at the other end
provided with a bevel gear wheel m, which in its turn meshes with another bevel
gear wheel n fastened to a horizontal axle o which projects through the frame u
and on the outside of the same is provided with a crank handle p.
The before mentioned lifting axle i is horizontally journaled in and projects
through the frame on the same side as the axle o, and carries outside the frame

page_text: a dial which moves over an opening s concentric with the lifting axle i and the
radius of which is somewhat smaller than the length of the said dial r. On one
side of the said opening a scale is-provided in which marks are made in such
places that when the dial r points to a certain mark the upper feeding rollers are
lifted just enough to allow a board of the thickness indicated by said mark to be
fed forward. In the said openings is provided a bolt i shoulder or the
like which by means of a washer and nut or the like may be moved to and
locked in any given place in the said opening. The object of this bolt t is to
afford a support for the dial r by means of which it may be prevented from turning
backward, thereby preventing the lifting axle i from turning and the upper feeding
rollers from sinking down when not upheld by a -board. The strain caused by
the weight of the upper feeding rollers being suddenly laid on to the feed shifting
mechanism when the said rollers leave a board, will thus be taken up by the
bolt and dial r instead of having to be borne by the feed shifting mechanism.
The operation of the apparatus is obvious. When the feed requires to be
changed for different thicknesses of board, the bolt or shoulder is loosened and
the crank p is turned, the motion of the same being transmitted to the lifting
axle, turning the same so that the upper feeding rollers are lifted or lowered
as the case may be. When the dial r points to the mark corresponding to the
desired thickness of board, the bolt or shoulder t is fastened so that the end of the
dial may rest upon the same.
Dated this 6th day of October 1806
CRUIKSHANK & FAIRWEATHER,
Chartered Patent Agents, 62 Saint Vincent Street, Glasgow.
Agents for the Applicant.
Improvements in the Feed-changing Mechanism for Wood and like
Planing Machines.
I, ANDERS AUGUST WESTMAN, of Gamla Kungsholmsbrogatan 21, Stockholm,
Sweden, Mechanical 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 the feed-changing mechanism in
planing machines for wood or the like, provided with rollers for holding down and
feeding forward the board that is to be planed, and the object of the invention is
to provide an arrangement by means of which the position of the said rollers may
be ascertained and changed, to suit a certain thickness of board that is to be
planed, without any experiment or trial, and, when so adjusted, to be held in that
position in such a way that the strain and weight is taken off the mechanism by
means of which the raising or lowering of the rollers is effected.
The invention consists in providing the lifting shaft (on which, in the usual
manner, the chains which carry the top-feeding rollers are wound) with a worm
gear in which meshes a worm. The shaft for said worm is in its turn provided
with a bevel gear wheel which meshes with another bevel gear wheel provided
with a crank and handle for the turning of the same. The end of the said lifting
shaft is provided with a hand which runs over and points at a scale provided with
marks corresponding to the different thicknesses of the board that may be called
for in planing, and below the scale in an opening, groove or the like, whose radius
is somewhat smaller than the length of the dial, is fixed a stop bolt or shoulder

page_text: which may be fastened anywhere in said opening so that the dial may rest against
the same in such manner that the strain of holding up the rollers is taken off
the said worm and bevel gear.
The invention is illustrated by the drawing left with the Provisional Specifica-
tion, in which is shown a side elevation of a portion of a planing machine provided
with this invention.
Referring to the drawing filed with the provisional specification a represents
the frame of the planing-machine. The lower feeding rollers b, bare journaled
in the said frame in the usual manner and the upper feeding rollers e, el are
hinged above on the stationary axle or shaft c by means of the arms d, d¹. The
upper feeding rollers are held up by means of bars f, f¹ which, as well known,
aje joined by their lower ends to a crosspiece g, which hangs at one end of chains h,
the other end of said chains being so fixed to the lifting axle i that the chains are
wound on to it when it is turned. The said lifting axle i is provided with a worm
gear wheel with which meshes the worm the shaft of which is at the other end
provided with a bevel gear wheel m, which in its turn meshes with another bevel
gear wheel n fastened to a horizontal axle o which projects through the frame a
and on the outside of the same is provided with a crank handle p.
The before mentioned lifting axle i is horizontally journaled in and projects
through the frame on the same side as the axle o, and carries outside the frame
a dial r which moves over an opening s concentric with the lifting axle i and the
radius of which is somewhat smaller than the length of the said dial r. On one
side of the said opening a scale is provided in which marks are made in such
places that when the dial r points to a certain mark the upper feeding rollers are
lifted just enough to allow a board of the thickness indicated by said mark to be
fed forward. In the said openings is provided a stop t, such as a bolt, shoulder or
the like which by means of a washer and nut, or the like, may be moved to and
locked in any given place in the said opening. The object of this stop t is to
afford support for the dial by means of which it may be prevented from turning
backward, thereby preventing the lifting axle i from turning and the upper
feeding rollers from sinking when not upheld by a board. The strain caused by
the weight of the upper feeding rollers being suddenly laid on to the feed-shifting
mechanism, when the said rollers leave a board, will thus be taken up by the
bolt t and dial r instead of having to be borne by the feed shifting mechanism.
The operation of the apparatus is obvious. When the feed requires to be
changed for different thicknesses of board, the bolt or shoulder t is loosened and
the crank is turned, the motion of the same being transmitted to the lifting
axle i, turning the same so that the upper feeding rollers are lifted or lowered
as the case may be. When the dial points to the mark corresponding to the
desired thickness of board, the bolt or shoulder t is fastened so that the end of the
dial may rest upon the same.
Having now particularly described and ascertained the nature of this said in-
vention, and in what manner the same is to be performed, I declare that what 1
claim is:-
1. The improvement in feed-changing mechanism for planing machines con-
sisting of an axle or shaft on to which the chain, that carries the feeding rollers,
is wound said shaft being provided with a hand pointing at a graduated scale,
substantially as and for the purpose described.
2. The combination with the feed changing mechanism for planing machines,
of a hand or pointer placed on the axle on shaft, on to which the chain, that carries
the feeding rollers is wound, said hand or pointer moving over or pointing to a
graduated scale, and an adjustable stop in the frame of the machine, substantially
as and for the purpose specified.
3. In feed-changing mechanisms for planing machines, a hand or pointer on the
axle or shaft, that carries the feed-roller supporting chain, a scale and adjustable
stop for said hand, a worm-gear for turning said axle, a bevel-gear for turning

page_text: said worm-gear and a crank and handle for turning said bevel-gear, substantially
as and for the purpose specified.
Dated this 2nd day of July 1897.
CRUIKSHANK & FAIRWEATHER,
Chartered Patent Agents, 62 Saint Vincent Street, Glasgow.
Agents for the Applicant.