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Патент USA US3055248

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Sept, 25, 1962
H. l. HAZZARD
3,055,238
FILE GUIDE FOR SHARPENING SAWS
Filed June 24, 1960
2‘
>
‘
Harry I Hazzaraf
INVENTOR.
35’
WHA/WV a McMAN/GAL
Af/omeys Icbr A/JfZ/ram‘
United States Patent G " ice
3,055,238
Patented Sept. 25, 1962
2
1
a similar group and likewise followed by such a group.
3,055,238
FELE GUIDE F653 SHARPENHQG SAWS
Harry I. Hazzard, Los Angeies, Qaii?, assignor to McCul
loc‘n (Iorporation, Los Angeles, Calif., a corporation of
Wisconsin
Filed dune 24, 196i), Ser. No. 38,629
13 Claims. (til. 76-36)
Extending downwardly from each of the center links 11
are sprocket engaging projections 17 by which the chain
is driven 'by a sprocket.
The cutters 13 and 14 are comprised of a web or shank
18, 18' extending vertically outwardly from the selected
side links. Extending inwardly from the outer portions
of the respective shanks are transverse toe portions 19,
19'. The shanks have curved portions from which the
The present invention relates generally to gauge de
toes extend and have beveled surfaces which form a con
vices and relates more particularly to a depth gauge and 10 tinuous bevel cutting edge which provide a side wall
?le guide device for use in sharpening the teeth of chain
cutting portion 2%, a curved intermediate cutting por
saws.
tions 21 and bottom cutting portion 22.
‘It is an object of the present invention to provide a
Spaced forwardly of each cutter are depth gauges 23
gauge and guide device of this character for use in check 15 and 23' extending outwardly from the selected side links
ing saw teeth and guiding the ?le while ?ling the teeth.
It is another object of the invention to provide a de
vice of this character wherein wear on the ?le is at a
minimum so that ?le life is prolonged.
Still another object of the invention is to provide a
’ device of this character with which all of the teeth of
the saw chain can be ?led from one side of the chain.
a shorter distance than the corresponding toe cutting
edge. The difference between the distances of the depth
gauges and the toe cutting edges from the horizontal
plane of the chain, extending through the pintles is pre
20 determined according to the depth of the cut desired for
each cutter, the individual out being determined by the
amount of the aforesaid diiference.
In other words, the work of ?ling the various teeth of
As chain saws are used, the cutting edges become dull
the chain saw may be performed from one side, thereby
and they are sharpened with a ?le. As can be observed
saving substantial time in the sharpening of said teeth as
25 in FIG. 3, the top toe surfaces slope downwardly toward
the operator therefore does not have to move from one
the rear and as the toe cutting edges are sharpened, they
side of the saw to the other during the sharpening op
are lowered in relation to the horizontal plane of the
eration.
chain and to the depth gauges. Thus, in order to main
It is an object of the invention to provide a combina
tain the same desired relationship between the length of
tion ?le guide and depth gauge indicator for use in 30 the depth gauges and the length of the toe cutting edges
sharpening the teeth of chain saws and which can be
from the horizontal plane of the chain when the cutting
used to indicate the proper depth of a depth gauge im
edge of a toe is ?led, thereby lowering it, the correspond
mediately ahead of a tooth that has been sharpened
ing depth gauge must be ?led to have the same relative
without removing the device from the chain.
amount of material removed from its outer surface so
It is a further object of the invention to provide a
35 that the depth gauge will be the predetermined distance
device of this character that is compact.
shorter than the toe cutting edge according to their de
It is a still further object of the invention to provide
sign to maintain the proper thickness of cut.
a device of this character that may be readily carried in
According to the present invention, the proper rela
the operator’s pocket when not in use.
tionship between the depth gauges and the ‘cutters which
Another object of the invention is to provide a device
follow them can be ‘maintained with the ?le guide ‘and
of this character that is relatively inexpensive to manu
:depth gauge or indicator, generally ‘designated in the draw
facture.
ings as 25. The guide is comprised of an elongated, sub
Still another object of the invention is to provide a
stantially ?at main frame having depending sides on its
device of this character that is durable.
central portion added to impart rigidity and ease of
A further object of the invention is to provide a de
handling. Longitudinally inwardly of its forward end
vice of this character that is simple in construction.
is a recessed portion generally designated as 29, formed
A still further object of the invention is to provide a
having two transversely spaced base surfaces 30. The
device of this character that is accurate and easy to use.
The characteristics and advantages of the invention
space between the base surfaces 30 is formed by a gen
erally rectangular cut-away portion 31 provided to per
are further suf?ciently referred to in connection with the
mit the placing of the ?le guide over a cutter to be sharp
following detailed description of the accompanying draw 50 ened
as indicated in FIG. 3. Extending upwardly from
ings, which represent one embodiment. After consider
the base surfaces 30 are transversely directed walls 32,
ing this example, skilled persons will understand that
3'2’ and 33, ‘33’, each two of which, according to the
many variations may be made without departing from the
corresponding
are in a transverse vertical plane
principles disclosed, and I contemplate the employment of 55 which intersectsnumbers,
the transverse vertical plane of the other
any structure, arrangements, or modes of operation that
centrally within the cut-away portion 311. These walls
are properly within the scope of the appended claims.
such ‘as 33, 33’, along with the base surfaces '30 ‘form the
Referring to the drawings, which are for illustrative
purposes only:
.
FIG. 1 is a side view of a gauge and device embody
ing the present invention;
glides according to which a ?le 35, as indicated in phan
tom lines in FIG. 2, may be moved to and fro to sharpen
60 the cutting edge on ‘one of the ‘cutters. The angle made
by the transverse intersecting planes of the upwardly di
FIG. 2 is a top plan view of the same;
rected guide walls is determined by the bevel angle de
FIG. 3 is a side view of a saw chain with the present
sired to be maintained on the teeth.
device shown in longitudinal section and disposed on said
Forwardly of the cut-away portion 31 and in longitudi
saw chain; and
65 nal alignment with its center, is a depth gauge receiving
‘FIG. 4 is a perspective view of the device.
slot 36 extending vertically through the forward surface
Referring again to the drawings, there is illustrated
37 of the main frame member. Slot 36 is adapted to be
in FIG. 3 is a saw chain including side links 10 and
placed in position on the saw chain around the depth
center links 11 connected consecutively by pintles 12.
gauge such as ‘23, immediately ahead of the tooth being
On selected side links 10a and 1012 are left and right
sharpened.
70
hand allochiral side cutters 13 and 14- respectively on
The upper surface 37 surrounding the slot 36 indicates
opposite sides of the chain. The two cutters form a
a proper height of the depth gauge when the guide 25 is
cutter group in the chain and each group is preceded by
3,055,238
properly placed upon the chain.
From the rearward
upper edge of the cut-away portion 31, extends a for
wardly directed positioning member 33, slanted upwardly
at the same angle as the upper toe surfaces of the cutters
on which it is to be used. As shown in FIG. 3, the posi—
tioner 38 is placed on top of the toe surface 19 when the
recessed portion is placed over and around the cutter and
the slot "36 is placed over the depth gauge 23. As may
be best seen in FIG. 2, the forward indicating point 39 on
4
In FIG. 3, the cutting edge on the forward cutter 13
has been sharpened and the top of the depth gauge 23
is extending upwardly through the slot 36. Then to com
plete the ?ling operation, the part of the depth gauge
extending above the surface 37 is removed.
After the cutting edges and its corresponding depth
gauge have been restored to their proper relationship, the
guide 25 is moved to the next cutter, such as 14, in the
approximate center of the chain in FiG. 3. To sharpen
positioner 38 is in longitudinal alignment with slot 36.
Spaced reaiwa-rdly of the recessed portion 29, a ‘longi 10 the continuous cutting edge on the cutter 14, it is only
necessary to move the ?le 35 in directions parallel with
tudinal distance to be determined according to the saw
the walls 32, 32’ and the sharpening operation can be
chain design on which the guide 25 is to be used, is a sec
performed from the same side of the chain as the sharp
ond longitudinally directed and centrally located slot 41
ening of cutter 13. This provides the obvious advantage
in longitudinal alignment with point 39 and slot 36. Slot
of not having to sharpen from both sides of the chain and
41 is cut vertically through a recesssed portion of the
saves a considerable amount of time in the sharpening
main frame so as to be surrounded by upper surface 42.
operation.
As may be best seen in FIG. 3, when the forward end
if it is desired that a deeper out be made by each indi
of the guide 25 is placed upon a saw chain, as discussed
vidual cutter, each depth gauge is shortened a greater
above, the rearward slot 41 is in position to be ?tted over
amount; that is, the relationship between the toe and the
a predetermined depth gauge on the chain. For the pur
depth gauge chain is changed. Provision is made for
pose of holding the guide in better alignment on the rear
this type of operation in the present invention whereby,
depth gauge, a slotted plate 43 is secured to the under
?rst, if necessary, all of the cutting edges are sharpened,
side of the main frame so that the slot 44 in the plate 43
as described above, and the distances from the outer sur
is in alignment with slot 41. In other words, the added
faces of the toes to the horizontal plane of the chain
wall surface forming the slot 44 makes it possible to hold
are shortened. Then, for example, if the bite is to be
the guide frame in more accurate alignment on the saw
chain.
increased from 0.030 inches to 0.035 inch in a particular
saw chain, the positioner 38 is successively placed with its
_ In order to use the guide 25 to sharpen the cutting edges
point 3‘) on the edges of each toe and the rear slot 41 is
on a saw chain, it is placed upon a chain, as shown in
placed on a corresponding rear depth gauge 23. As indi
FIG. 3, with the positioner 38 in contact with the toe of
cated by the numbers “.035” on the particular guide when
the cutter to be sharpened, with the slot ‘36 over the
the top of the depth gauge in slot 41 is ?ush with surface
depth gauge 23 immediately forward of the cutting edge
42, the bite distance is nominally 0.035 inch. In other
to be sharpened and the rearward slot 41 is placed over
a depth gauge, the slot 41 being positioned to be ?ttted 35 Words, when each depth gauge placed in slot 41 is ?led
down to be ?ush with surface 42, the bite for each indi
over a speci?c depth gauge on the chain for which the
vidual cutter has been increased to 0.035 inch.
guide is made. During the ?ling operation, the Walls 3-3,
A ?le guide, according to the present invention, may
33', for example, and the point 39 on the positioner 38
be speci?cally designed for any particular design of chain
are moved slightly rearwardly of the beveled surface form—
according to its cutter size and depth of cut and may have
ing the cutting edge so that the ?le does not abrade the
a plurality of slots surrounded by surfaces of different
walls. ‘In other words, the walls are a sight guide for
heights to increase or decrease the bite of the individual
sharpening the cutting edge rather than a contact sur
cutters by ?ling the corresponding depth gauges to the
face on which the ?le moves ‘to and fro during the sharp
respective surfaces. It is clear that the ?le guide and
ening operation. As maybe seen in FIG. 3, the unhard
depth gauge indicator may be made in various other forms
ened metal surface 30 is positioned to support the ?le
during the sharpening. This type of sharpening is highly
successful in that the ?le is given proper guidance Without
any unnecessary wear on it aswould occur if the ?le were
used in contact with the Walls or on a hardened base sur
face. When a proper shaped ?le is used, that is, ‘accord
ing to the continuous surface of the cutting edge, both the
toe and shank portions may be sharpened at the same
. time.
When the cutting edges have been sharpened, the guide
Without departing from the inventive principles disclosed
herein.
I claim:
1. The combination ?ling guide for use in the sharpen
ing of saw chain teeth and for use in the ?ling of depth
gauges to correspond to the teeth, said saw chain being of
the type having right and left-hand longitudinally ar
ranged cutters on selected links of the chain, each cutter
having a toe edge extending transversely from a shank and
having a cutting edge formed on each toe and shank, and
is moved forwardly on the chain so that the point 39 is
directly above a point on the toe cutting edge. When the
guide is in the said position, the continuous beveled sur
a depth gauge spaced forwardly of the cutting edge on
selected links, said guide comprising: an elongated mem
face may be checked for proper alignment by sighting
along the walls and the base of the recessed portion 29.
Generally, an experienced operator will keep the beveled
pose its cutting edge and to provide a guide for a ?le to
ber; means on said member for ?tting on a cutter to ex
sharpen said last mentioned cutting edge; and means for—
surface in the proper alignment with the guide as he flies 60 wardly on said member to ‘measure the depth of, and to
guide for ?ling a depth gauge spaced forwardly of said
and the operation will be completed in one step on each
cutter.
Adjacent the forward end 26 are the numbers “.030”
which indicate that when the bite thickness is to be about
0.030 inch for a particular saw chain, or stated differently,
when the depth gauge is to be 0.030 inch shorter than the
last mentioned cutting edge.
2. The combination filing guide for use in the sharpen
ing of saw chain teeth and for use in the ?ling of depth
gauges to correspond to the teeth, said saw chain being
of the type having right and left-hand longitudinally ar
cutting edge of the toe, the top of the depth gauge is to
ranged cutters on selected links of the chain, each cutter
be ?led down to, be flush with the surface 37. Thus,
having a toe edge extending transversely from a shank and
when the sharpening of a cutter is completed and the
having a continuous cutting edge formed on each toe and
70
point 39 is on the toe cutting edge, the part of the depth
shank, and a depth gauge spaced forwardly of the cutting
gauge 23 extending upwardly above the surface 37 on the
edge on each selected link, said guide comprising: an
guide is ?led down to the surface to recreate the proper
relationship between the toe cutting edge and the depth
gauge so that the cutter will make the designed bite or
cut
elongated member; means on said member for ?tting on a
cutter to expose its cutting edge and to provide a guide
‘for a ?le to sharpen said last mentioned cutting edge from
either transverse side thereof; and means forwardly on
3,055,238
5
said member to measure the depth of, to expose and to
guide for ?ling the depth gauge spaced forwardly of said
last mentioned cutting edge.
3. The combination ?ling guide for use in the sharpen
ing of saw chain teeth and for use in the ?ling of depth
gauges to correspond to the teeth, said saw chain being
of the type having right and left-hand longitudinally ar
ranged cutters on selected links of the chain, each cutter
having a toe edge extending transversely from a shank
‘and having a continuous cutting edge formed on each toe
and shank, and a depth gauge spaced forwardly of the
continuous cutting edge on selected links, said guide com
prising: an elongated substantially ?at member; means
the amount to be ?led off the end of said depth gauge
engageable in said ?rst slot means vwhen said indicator is
placed on said last mentioned toe cutting edge after it is
sharpened; second slot means on said member to engage
another depth gauge on said chain for supporting said
member; and means on said second slot means for indi
cating the amount to be ?led o?f the end of said another
depth gauge engageable in said second slot means when
said indicator is placed on said last mentioned toe cutting
edge after it is sharpened and after the continuous cutting
edge on the selected link of said another depth gauge is
sharpened.
6. The combination ?ling guide for use in the sharpen
ing of saw chain teeth and for use in the ?ling of depth
gauges to correspond to the teeth after they have been
its continuous cutting edge and to provide a guide to 15 sharpened, said saw chain being of the type having right
sharpen said last mentioned cutting edge from either trans
and left-hand longitudinally arranged cutters on selected
verse side thereof; a positioner pointer in said means on
links of the chain, each cutter having a toe edge extending
said member to be placed on the toe cutting edge of said
transversely from a shank and having a continuous cut
last mentioned edge; slot means forwardly on said mem
ting edge formed on each toe and shank, and a depth
ber to engage and to expose for ?ling a depth gauge
gauge spaced forwardly of the continuous cutting edge on
on said member for slidably ?tting on a cutter to expose
spaced forwardly of said continuous cutting edge; means
on said slot means for indicating the amount to be ?led
selected links, said guide comprising: an elongated sub
stantially ?at member; a depressed portion on said mem
oif the end of said depth gauge engageable in said slot
ber; downwardly directed walls forming guide surfaces on
means when said pointer is placed on said last mentioned
said depressed portions; an opening in said depressed
25
toe cutting edge; and means on said member to engage
portion for ?tting on a cutter to expose its continuous
another depth gauge on said chain for supporting said
cutting edge and for aligning su?icient of said guide sur
member.
faces with said last mentioned edge to provide a guide
4. The combination ?ling guide for use in the sharpen
for ?ling it; a longitudinally directed slot through said
ing of saw chain teeth and for use in the ?ling of depth
member for slidable engagement with the depth gauge
gauges to correspond to the teeth after they have been 30 immediately forwardly of said last mentioned cutting
sharpened, said saw chain being of the type having right
edge; and a positioning indicator extending from said
and left-hand longitudinally arranged cutters on selected
member over said opening toward said slot and adapted
links of the chain, each cutter having a toe edge extend
to extend on the toe of said cutter, said indicator being
ing transversely from a shank and having a continuous
adapted to have its end over said opening to be placed
35
cutting edge formed on each toe and shank, and a depth
on the toe cutting edge of said last mentioned continuous
gauge spaced forwardly of the continuous cutting edge
edge after it has been sharpened to thereby move said
on each selected link, said guide comprising: an elon
slot on said last mentioned depth gauge to indicate the
gated substantially ?at member; means adjacent one end
amount to be ?led from said last mentioned depth gauge.
of said member for slidably ?tting on a cutter to expose
7. The combination ?ling guide for use in the sharp
40
its continuous cutting edge and to provide a guide for a
ening of saw chain teeth and for use in the ?ling of
?le to sharpen said last mentioned continuous cutting edge
depth gauges to correspond to the teeth after they have
from either transverse side thereof; a positioner pointer
been sharpened, said saw chain being of the type having
in said means adjacent said one end to be placed on the
right and left-hand longitudinally arranged cutters on
cutting edge of said last mentioned cutting edge after it is
selected links of the chain, each cutter having a toe edge
45
sharpened; means forwardly on said member to engage
extending transversely from a shank and having a con
and to expose for ?ling the depth gauge spaced forwardly
tinuous cutting edge formed on each toe and shank, and
of said last mentioned continuous cutting edge; slot means
a depth gauge spaced forwardly of the continuous cutting
in said member to engage another depth gauge on said
edge on each selected link, said guide comprising: an
chain for supporting said member; and means on said
elongated substantially ?at member; a depressed portion
slot means for indicating the amount to be ?led off the 50 adjacent one end of said member; downwardly directed
end of said another depth gauge engageable in said slot
walls forming guide surfaces on said depressed portions;
means when said pointer is placed on said last mentioned
an opening in said depressed portion for ?tting on a
toe cutting edge after it is sharpened and after the con
cutter to expose its continuous cutting edge and for align
tinuous edge on its selected link is sharpened.
ing sui?cient of said guide surfaces with said last men
5. The combination ?ling guide for use in the sharp— 55 tioned edge to provide a guide for ?ling it; a longitudinally
ening of saw chain teeth and for use in the ?ling of depth
directed slot through said member between said one end
gauges to correspond to the teeth after they have been
and said depressed portion for slidable engagement with
sharpened, said saw chain being of the type having right
and left-hand longitudinally arranged cutters on selected
the depth gauge immediately forwardly of said last men
tioned cutting edge; a positioning indicator extending from
links of the chain, each cutter having a toe edge extend 60 said member over said opening toward said slot and adapt
ing transversely from a shank and having a continuous
cutting edge formed on each toe and shank, and a depth
gauge spaced forwardly of the continuous cutting edge on
each selected link, said guide comprising: an elongated
ed to extend on the toe of said cutter, said indicator being
adapted to have its end over said opening to be placed
on the toe cutting edge of said last mentioned continuous
edge after it has been sharpened to thereby move said
substantially flat member; means adjacent one end of said 65 slot on said last mentioned depth gauge to indicate the
member for slidably ?tting on a cutter to expose its con
amount to be ?led from said last mentioned depth gauge;
tinuous cutting edge and to provide a guide for a file to
and a second longitudinally directed slot through said
sharpen said last mentioned continuous cutting edge from
member spaced from said ?rst mentioned slot, said slots
and said indicator being in longitudinal alignment, said
said means adjacent said one end to be placed on the toe 70 second slot being positioned to engage another depth
cutting edge of said ‘last mentioned continuous cutting
gauge on said chain for aligning and supporting said
edge after it is sharpened; ?rst slot means forwardly on
member thereon.
said member to engage and to expose for ?ling the depth
8. The combination ?ling guide for use in the sharpen
gauge spaced forwardly of said last mentioned continuous
ing of saw chain teeth and for use in the ?ling of depth
either transverse side thereof; a positioning indicator in
cutting edge; means on said first slot means for indicating 75
3,055,238
gauges to correspond to the teeth, said guide comprising:
an elongated substantially flat member; a depressed p0r~
tion adjacent one end of said member; downwardly di
rected walls forming'two sets of side ‘guide surfaces on
said depressed portion, said walls being in intersecting
transverse planes; a base surface of said depressed por
tion joining said walls and forming a bottom guide sur
face; an opening in said depressed portion for ?tting over
a cutter to expose its cutting edge and for aligning at
least one set of said guide surfaces with said last men
8
comprising: an elongated member; means on said mem
ber for ?tting on a cutter to’ expose its cutting edge and to
provide a guide to sharpen said last mentioned cutting
edge; and means on said member to measure the depth
of and to guide for ?ling a depth gauge on said chain.
11. The combination ?ling guide for use in the sharp
ening of saw chain teeth and for use in the ?ling of depth
gauges to correspond to the teeth, said chain being of the
type having right and left-hand longitudinally arranged
tioned edge to provide a guide for ?ling it; a longitudi 10 cutters on selected links of the chain, each cutter having
a toe edge extending transversely from a shank and hav
nally directed slot through said member between said
ing a continuous cutting edge formed on each toe and
one end and said depressed portion for slidable engage
shank, and a depth gauge spaced forwardly of the con
ment with a depth gauge immediately forwardly of said
last mentioned cutting edge; and a positioning indicator 15 tinuous cutting edge on said selected links, said guide
comprising: an elongated member; means on said mem
extending from said member over said opening toward
her for ?tting on a cutter to expose its cutting edge and
said slot, said indicator being adapted to have its end over
to provide a guide for a ?le to sharpen said last men
said opening to be placed on the cutting edge after it has
tioned cutting edge; and means rearwardly on said mem
been sharpened to thereby move said slot on said last
ber to measure the depth of and to guide for ?ling a depth
mentioned depth gauge to indicate the amount to be ?led
gauge spaced rearwardly of said last mentioned cutting
from said last mentioned gauge.
edge.
9. The combination ?ling guide for use in the sharpen
12. The combination ?ling guide for use in the sharp
ing of saw chain teeth and for use in the ?ling of depth
ening
of saw chain teeth and for use in the ?ling of depth
gauges to correspond to the teeth after they have been
gauges to correspond to the teeth, said chain being of
sharpened, said saw chain being of the type having right
the type having right and left-hand longitudinally ar
and left-hand longitudinally arranged cutters on selected
ranged cutters on selected links of the chain, each cutter:
links of the chain, each cutter having a toe edge extend
having a toe edge extending transversely from a’ shank
ing transversely from a shank and having a continuous
and having a continuous cutting edge formed on each toe
cutting edge formed on each toe and shank, and a depth
and shank, and a depth gauge spaced forwardly of the
gauge spaced forwardly of the continuous cutting edge on
continuous cutting edge on said selected links, said guide
each selected link, said Xguide comprising: an elongated
comprising: an elongated member; means on said mem
ber for ?tting on a cutter to expose its cutting edge and
to provide a guide for a ?le to sharpen said last men
tioned cutting edge; a positioner pointer in said means on
said member to be placed on the toe of and adjacent the
substantially ?at member; a depressed portion adjacent
one end of said member; downwardly directed Walls
forming two sets of side guide surfaces on said depressed
portion, said walls being in intersecting transverse planes;
a base surface of said depressed portion joining said walls
cutting edge of said last mentioned edge to indicate when
and forming a bottom guide surface; an opening in said
the cutting edge is in a correct position for ?ling relative
depressed portion for ?tting over a cutter to expose its
to said last means; and means on said member to expose
continuous cutting edge and for aligning at least one set
a depth gauge on said chain for ?ling.
of said guide surfaces with said last mentioned edge to 40
13. The combination ?ling guide for use in the sharp
provide a guide for ?ling it; a longitudinally directed slot
ening of saw chain teeth and for use in the ?ling of depth
through said member between said one end and said de
gauges to correspond to the teeth, said chain ‘being of the
pressed portion for slidable engagement with the depth
gauge immediately forward of said last mentioned cutting
edge; a positioning indicator extending from said member
over said opening toward said slot and adapted to extend
on the toe of said cutter, said indicator being adapted to
have its end over said opening to be placed on the toe
type having right and left-hand longitudinally arranged
cutters on selected links of the chain, each cutter having
45 a toe edge extending transversely from a shank and hav
ing a continuous cutting edge formed on each toe and
shank, and a depth gauge spaced forwardly of the con—
tinuous cutting edge on said selected links, said guide
cutting edge of said last mentioned continuous edge after
comprising: an elongated member; means on said mem
it has been sharpened to thereby move said slot on said
last mentioned depth gauge to indicate the amount to be
?led from said last mentioned gauge; and a second longia
ber for ?tting on a cutter to expose its cutting edge and
to provide a guide for a ?le to sharpen said last men
tioned cutting edge; a positioner pointer in said means
on said member to be placed on the toe of the cutting
tudinally directed slot through said member spaced from
said ?rst mentioned slot, said slots and said indicator
being in longitudinal alignment, said second slot being
positioned to engage another depth gauge on said chain
edge of said last mentioned edge to indicate when the
cutting edge is in a correct position for ?ling relative to
for aligning and supporting said member thereon, the
pose for ?ling a depth gauge spaced forwardly of said
surface of said member surrounding said second slot
‘being on a different level from the surface surrounding
the ?rst slot.
10. The combination ?ling ‘guide for use in the sharpen
said last means; means forwardly on said member to ex
continuous cutting edge; and means on said last means
for indicating the amount to be ?led off the end of said
60 depth gauge when said pointer is placed on said last men
ing of saw chain teeth and for use in the ?ling of depth
gauges to correspond to the teeth, said chain being of
the type having right and left-hand longitudinally ar
ranged cutters on selected links of the chain, each cutter
having a toe edge extending transversely from a shank C) 01
and having a continuous cutting edge formed on each toe
end shank, and a depth gauge spaced forwardly of the
continuous cutting edge on said selected links, said guide
tioned toe cutting edge.
References Cited in the ?le of this patent
UNITED STATES PATENTS
2,727,830
2,762,241
2,822,707
2,871,728
Siverson ___________ __ Mar. 13,
Nielson _____________ __ Sept. 11,
Gommel ____________ __ Feb. 11,
Tremblay ____________ .._ Feb. 3,
1956
1956
1958
1959
2,898,782
Consoletti __________ __ Aug. 11, 1959
UNITED STATES PATENT OFFICE
CERTIFICATE OF CORRECTION
Patent No. 3,955,238
September 2235Y I962
Harry I. Hazzare‘
It is hereby certified that error appears in the above numbered pat
ent requiring correction and that the said Letters Patent should read as
corrected below.
Column 8, line 65; for "2,72%830" read --— 29731830 =--;
same column 8, list of references cited‘7 ado? the following:
FOREIGN PATENTS
587.303‘ - Canada ----- 4- ------ —-Nov.
17,
1959
Signed and sealed this 12th day of February 1963‘,
(SEAL)
Attest:
ERNEST w. SWIDER
DAVID L- LADD
Attesting Officer
Commissioner of Patents
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