An Improvement in Machines for Facing or Planing Wood and other Materials.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
An Improvement in Machines for Facing or Planing Wood and other
Materials.
;
:
We, ARTHUR SALISBURY CAINS, of Salisbury House, High Road, Leytonstone,
in the County of Essex, Pattern Maker, and WILLIAM HARDWICK GRANT-MORRIS,*
of Kincora, Higher Warberry Road, Torquay, in the County of Devon, Engineer-
ing Apprentice, do hereby declare the nature of this invention to be as follows:
-
The invention has for its object an improvement in machines for facing or.
planing wood and other materials with a view to obtain an automatically acting
guard to the cutters which on a piece of timber or other material being pushed.
along the table of the machine are pushed out of the way thereby permitting the,
cutters or plane irons to act on the material but which shall automatically return:
to their guarding position over the cutters directly they are freed from the pres-.
sure of the timber or other material.
'
For this purpose we mount on an axle below the machine table and preferably
below the axis of the plane or cutter a series of curved arms acted upon by springs:
to keep their upper ends normally over the plane cutters, a suitable stop being.
provided to regulate their position. Each of these curved guard arms is capable
of independent action so that any number or all of them can be pushed out of
the way according to the width of the timber or other material being acted on.
The opening in the machine table is made somewhat larger than usual to;
permit of the passage therethrough of the guard arms..
nd this 92nd day of Santember 1898
HARRIS & MILLS,
23, Southampton Buildings, London, W.C.,
Agents.
An Improvement in Machines for Facing or Planing Wood and other
Materials.
We, ARTHUR SALISBURY CAINS, of Salisbury House, High Road, Leytonstone,"
in the County of Essex, Pattern Maker, and WILLIAM HARDWICK GRANT-MORRIS,
of Kincora, Higher Warberry Road, Torquay, in the County of Devon, Engineer-
077

page_text: ing Apprentice, 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: --
The invention has for its object an improvement in machines for facing on
planing wood and other materials with a view to obtain an automatically acting
guard to the cutters which on a piece of timber or other material being pushed
along the table of the machine are pushed out of the way thereby permitting the
cutters or plane irons to act on the material but which shall automatically
return to their guarding position over the cutters directly they are freed from the
pressure of the timber or other material.
We will describe our invention by the aid of the accompanying drawings in
which Figures 1, 2, 3, 4 are sectional side elevations Fig. 5 is a vertical cross
section and Fig. 6 a sectional plan of parts showing our invention applied to a
planing machine having a horizontal cutter shaft. Figures 7 and 8 are detail
views of parts.
According to our invention we mount loosely on an axle 61 below the machine
table and preferably below the axle a¹ of tlie plane or cutter a a series of
curved arms б which may be acted upon by springs to keep their upper or guard
ends 62 normally over the plane cutters a but which as represented in the drawings
are acted upon by weights 63, one of which is fixed rigidly to each curved arm b
In order to regulate the position of these curved guard arms when over the cutters
a stop rod c is provided which is carried by arms c¹, one of which is fixed rigidly
to the shaft b¹, near each end thereof; and in order that such stop rod c may
also be used to press the curved guard arms back and secure them in such
position while the cutters a are being sharpened we fix rigidly on one end of
the shaft b¹ a quadrant lever c² one end of which is provided with a hole through
which a pin can be passed into one or other of two holes cc formed in the
framing of the machine or in a fixing attached thereto; the hole c being used
when the rod c is merely acting as a stop to regulate the, position to which the
curved arms b rise as in Figures 1 and 2 and when the rod c is assisting to lock
the curved guard arms in their guarding position over the rotary cutter, and the
hole when said rod c is acting to retain the curved guard arms b in their
retracted position.
We also preferably employ in connection with the said curved guard arms b
means by which one or more of them can be held firmly in position over the
cutters whilst the others are free to oscillate on their shaft b'.
arm.
For this purpose we mount on the stop rod ca number of catch levers d fixed
rigidly on such stop rod, a separate catch lever acting with each curved guard
These catch levers d can be simultaneously operated by the following means
to place them in the raised position shown by Fig. 1 and thereby enable all the
curved guard arms 6 to work free thereof or in any position between such raised
position and their lowest position and inclusive of the latter according to the
number of curved guard arms it is desired to secure against oscillation, that is to
say, to the outer end of the catch lever d next to one side frame is pin jointed
one end of a link the other end of which is pin jointed to a lever d² fixed
rigidly inside of the side frame to the sleeve of a lever outside of the side
frame, said sleeve carrying the levers dad being mounted loosely on the
shaft b. The quadrant lever is formed with a concentric slot ce and the lever
has a screw threaded stud de fixed thereto which passes through said slot and
has a nut mounted thereon so that the lever d can be clamped to the quadrant
lever in any position within the limits of the slot c. Or the lever d can be
adjustably fixed to the quadrant lever in any other suitable manner. The
curved guard arms bare each provided with a stud or projection 64 to act in com-
bination with the locking surface d of its catch lever d and such locking sur-
faces are successively of increased length from one side of the machine to the
other, Figures 7 and showing the two extreme catch levers d.

page_text: The opening in the machine table is made somewhat larger than usual to
permit of the passage therethrough of the curved guard arms.
By the means hereinbefore described when the catch levers d are all raised as
shown at Fig. 1, with their bearing surfaces d' above the studs or projections b
of the curved guard arms d each of the latter is capable of independent action so
that any number or all of them can be pushed out of the way according to the
width of the timber or other material for the time being acted on.
When the parts are in the position shown at Fig. 2, that is to say with zonie
of their bearing surfaces d' above and some below the line of studs or projec-
tions 6, some of the curved guard arms b are held firmly in position over the
rotary cutter by some of the catch levers d whilst the remainder are free to
oscillate over the cutters and to be pushed aside by the wood or other material
under operation.
The curved guard arms are shown at Fig. 3 in their locked retracted position
to enable the cutters to be sharpened, removed and replaced and at Fig. 4 the
curved guard arms are shown locked in position over the cutters when the machine
is not in use.
To place the stop rod c and catch levers d in the position shown in Fig. 1 the
lever d is clamped to the lower end of the slot of the quadrant lever cand
the latter has its pin c³ placed in the hole c. To place the stop rod c and catch
levers d in the position shown in Fig. 2 the lever d is clamped centrally of the
slot and the pin c³ is in the hole c. To place the stop rod c and catch levers d
in the positions shown in Figures 3 and 4 the lever is clamped to the upper
end of the slot c; but in Fig. 3 the pin is placed in the hole whilst in Fig. 4
the pin is placed in the hole c*.
It will be evident that a single curved guard arm b having its part 2 of suffi-
cient width can be used without departing from the peculiar character of our
invention; and it will be also evident that instead of employing a number of catch
levers fixed rigidly together as above described we may employ a single bar
having a number of locking surfaces d formed thereon of similar character and
arrangement to those before described.
We would also remark that our invention is equally applicable-to machines for
facing or planing wood and other materials in which the cutter shaft is mounted
in a vertical position in which case the position of the parts forming our improve-
ments will be suitably modified as will be readily understood and the curved
guard arms will be acted upon by springs in lieu of by weights.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is:
1. In a machine for facing or planing wood and other materials the combination
with the cutter of one or more curved guard arms mounted on an axis of motion
and normally covering the cutter but which can be pushed back by the material
being treated and automatically return to their guarding position, substantially
as herein set forth.
2. In a machine for facing or planing wood and other material the combination
with the cutter of curved guard arms mounted on an axis of motion and normally
covering the cutter, a stop rod to limit the forward position of said guard arms,
lever arms carrying said stop rod and means for moving said stop rod so as to
enable the curved guard arms to be retracted from their guarding position and
there held when sharpening or otherwise attending to the cutter, substantially as
herein set forth.
3. In a machine for facing or planing wood and other material the combination
with the cutter of curved guard arms mounted on an axis of motion and normally
covering the cutter, a stop rod to limit the forward position of said guard arms
and means for locking some or all of said guard arms in their guarding position,
substantially as herein set forth.

page_text: 4. In a machine for facing or planing wood and other material the combination
with the cutter of curved guard arms mounted on an axis of motion and normally-
covering the cutter, a stop rod to limit the forward position of said guard arms,
means for locking some or all of said guard arms in their guarding position and
means for retracting said guard arms and for securing the same in their retracted.
position whilst sharpening or otherwise attending to the cutter, substantially as
herein set forth.
1
Ր
1900
HARRIS & MILLS,
23, Southampton Buildings, London, W.C.,
Agents.