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Патент USA US3068929

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Dec. 18, 1962
R. c. KALEY
3,068,919
SHAPER GUARD FOR RADIAL SAW MACHINE
Filed Sept. 22, 1959
4 Sheets-Sheet l
FIGJ
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IH'IH ‘
O
INVENTOR.
ROBERT C.KALEY
'ATTORN EY
‘ Dec. 18, 1962
R. c. KALEY
3,068,919
SHAPER GUARD FOR RADIAL SAW MACHINE
Filed Sept. 22, 1959
'
4 Sheets-Sheet 2 '
FIG.?)
39
INVENTOR.
ROBERT C. KALEY
V BYW
ATTORNEY
Dec. 18, 1962
_
R. c. KALEY
3,068,919
SHAPER GUARD FOR RADIAL SAW MACHINE
Filed Sept. 22, 1959
4 Sheets-Sheet 3
5 | ~
T1;
1h
“
“
FIG.6
_
22
INVENTOR.
ROBERT C.KALEY
ATTORN EY
Dec. 18, 1962
R. c. KALEY
3,068,919
SHAPER GUARD FOR RADIAL SAW MACHINE
Filed Sept. 22, 1959
4 Sheets-Sheet 4
INVENTOR
ROBERT C. KALEY
United States Patent‘ 0 f
3,068,919
Patented Dec. 18, 1962
1
2
3,068,919
con?guration of its parts. A top plate 10 has a thicker
center portion 11. from which there projects upward the
arcuate bracket 12. The thicker center portion 11 termi
SHAPER GUARD FOR RADIAL SAW MAQHINE
Robert C. Kaley, Landisville, Pa., assignor, by mesne as~
signrnents, to De Walt, Inc., a corporation of Delaware
Filed Sept. 22, 1959, Ser. No. 841,616
7 Claims. (Cl. 144-251)
nates in the accurately machined, semi-circular inner edge
13. An outer area 14 of the top plate 10 may be offset
downwardly and then terminate in the downward extend
ing, vertical ?anges 15 and 16. The front of the top‘ plate
This invention relates to safety guards for power tools,
10 has the thicker, rectangular lug 28 formed integrally
with it to extend between the inwardly disposed ends of
and more particularly to an adjustable safety guard for a
rotary cutting tool which is mounted on a rotating verti 10 the flanges 15 and 16.
A central slide 17 has a vertical channel 18 formed in
cal shaft which may be tilted from the vertical to perform
its back surface into which the front of the lug 28 ex~
a variety of operations.
~
tends. The central slide 17 is then slidably secured to the
When radial saws and the like are locked in a vertical
lug 28 by means of a threaded stud 21 which projects for
position for shaping operations, they may have ai?xed a
ward from the vertical. front face of the lug 23 to pass
suitable safety guard such as that shown in the US. Pat
through a vertical slot 22 in the slide 17. The stud 21
ent No. 2,785,716 to Joseph B. Lutton. This type of guard
may be used to lock the lug 17 to the vertical slide 28 by
is quite suitable for the protection of an operator perform
tightening the knurled thumb nut 2t? to clamp it. The ver~
ing a shaping operation, but when the tool shaft is tilted
tical recess 23:, which is formed in the back of the slide 17
from the vertical to perform rabbeting, rafter notching, or
like operations, a more versatile guard is needed to pro 20 and which may be seen in FIG. 5 and FIG. 8, serves no
functional purpose except to lighten the structure. As
tect the operator as the guard must be adjustable so that
shown in FiGS. 5, 6, and 8, a bolt 24 passes through
it can extend horizontally above the workpiece with a
the flanges of the end of channel 18 to pivotally se
uniform clearance. It is, therefore, an object of this in
cure the side protective members 30 and 31 by their in
vention to provide a safety guard which may be adjusted
wardly turned end flanges 32 and 33. As shown the bolt
vertically and also tilted in relation to a cutting tool to
24 is secured with a lock nut 25 so that it cannot work
effectively prevent inadvertent injury to an operator per
forming a wide variety of operations.
Another object of this invention is to provide a more
loose.
easily attached vertically adjustable safety guard which
and 31.
The side members 36 and 31 contain the vertical slots
34 and 35 through which the bolts 36 and 37 extend after
may be simply tilted and securely locked in a wide range 30
of positions.
Washers 29 ensure a smooth pivotal connection
between the ‘slide 17 and the side protective members 36
A ‘further object of this invention is to provide a verti
passing through the elongated horizontal slots 26 and‘ 27
cally adjustable tilting safety guard which is assembled
in the vertical flanges 15 and 16. The heads of the bolts
36 and 37 extend inwardly and have one flat side lying
against the underside of the outer area 14 of the top plate
1b. This prevents the bolts 36 and 37 from turning when
from a small number of parts that can be ruggedly fabri~
cated with less expense to withstand hard usage.
Yet another object of this invention is to provide an
the thumb nuts 38 and 39 are tightened about them to
adjustable, tilting safety guard which does not reduce the
lock the rear portion of the side protective members 30
space in which a cutter may rotate when the guard is tilted
and 31 to the top plate 1%} in a given position. The hori
in relation to the cutter.
40 zontal ?anges $5 and 56 project inward from the top of
Still another object of this invention is to provide a ver
tically adjustable, tilting safety guard which occupies a
minimum space and which is adjusted and then locked in
position by tightening three easily reached thumb nuts.
Additional objects, advantages, and features of inven
tion reside in the construction, arrangement and combina
tion of parts involved in the embodiment of the invention
as will be understood from the following description and
accompanying drawings wherein:
PEG. 1 is a perspective view of a radial saw equipped
with a safety guard and set with its shaft inclined from
the vertical to perform a rafter notching operation;
FIG. 2 is a top view of the safety guard shown re
moved from the radial saw;
FIG. 3 is a front View of the safety guard shown ?xed
to a fragment of a vertical radial saw motor with a small
piece of one of the side protective members broken away
to show the con?guration of the top plate;
FIG. 4 is a ‘side view of the safety guard shown ?xed
to a fragment of a radial saw motor which is positioned to
perform an angled rabbeting operation;
FIG. 5 is a rear elevational view of the safety guard;
FIG. 6 is a bottom view of the safety guard, as taken on
line 6-6 of FIG. 5;
.
'
FIG. 7 is a section of a fragment of the safety guard
taken on line 7—7 of FIG. 5; and
FIG. 8 is a section of a fragment of the safety guard
taken on line 8—-8 of FIG. 5.
‘
the side members 30 and 31 to add strength to the side
members and to improve the appearance of the safety
guard. In the lowermost position of the side members 30
and 31, as shown in FIG. 5, the flanges 55 and 56 rest on
Y the outer area 14 of the top plate iii.
Operation
The invention may be used as follows. As may be seen
in FIGURE 4, the motor (it? has a circumferential groove
41 at its end where the shaft 42‘ extends to rotate the
cutter Ai6. Above this groove 41, there projects the stud
43 about which there may be turned the wing nut 45.
The safety guard is installed by sliding the inner semi
circular edge '13 of the top plate 10 into the groove 41
of the motor 4% so that the stud 43 extends through the
slot Aid of the bracket; This mounting allows the safety
guard to be rotated about the motor 44} through the num
ber of degrees described by the slot 44 and then to be
locked to the motor at} in a desired position by tightening
the wing nut 45, thus enhancing the overall versatility of
the safety guard.
For an ordinary or normal shaping (or rabbeting)
operation, the motor
would be secured in a vertical
position as shown in PEG. 3. The thumb nuts 30, 38 and
39 would be loosened and the safety guard would be
moved upwards relative to the top plate 16 in a horizontal
position to allow a cutter attached to the motor 49 to
extend below the bottoms of the side members 3i} and
FIG. 9 is an exploded view of the components of the
70 31 and‘ the slide 1'7. When the guard would clear the
shaper guard in relationship to the motor of the tool.
workpiece to be subjected to the shaping operation with
Referring to the drawings in detail, FIGS. 2, 3, 5, 6, 7
a suitable working clearance, the thumb nuts 2%, 38 and
and 8 show the construction of the safety guard and the
ace-e919
39 are tightened to lock the safety guard in position.
When such a vertical adjustment of the safety guard is
made, the bolts 56 and 37 slide in the slots 34 and 35
(see FIGURES 5 and 7) as the stud 21 moves in the slot
32 of the slide ‘27. With the safety ‘guard in such a posi~
tion (as is usually desirable for a normal shaping opera
tion), it will be appreciated, of course, that the safety
guard will be so adjusted as to be substantially parallel
,to the top surface of the workpiece, it being noted (as
shown in FIGURE 3) that the side protective members
39 and 31 will be coplanar with respect to each other.
Moreover, in such a position for a normal shaping opera
tion, the slide 17 (when tightened by means of the thumb
nut 26 and stud 21) will usually be normal to the plane
4
faces of the side protective members 36 and 31. This
limiting of the rearward motion of the side members 3-3
and 31, relative to the top plate it}, limits the forward
pivoting action of the slide I7 so that the upper end of the
slide 17 does not project so far forward that it interferes
with the operator. Thereafter, the thumb nuts 33 and
39 may also be tightened to secure the safety guard in
position for a particular rabbeting operation as shown in
FIGURE 4.
When it is desired, on the other hand, to perform a
rafter notching operation, the motor 40 must be tilted
forwardly, as contradistinguished from the rearward tilt
ing of the motor 40 in the course of the aforesaid angled
rabbeting operation illustrated in FIGURE 4. Hence, as
of the top plate 10, it being further noted (as aforesaid) 15 shown more particularly in FIGURE 1, the workpieces
that the slide 17 has a vertical channel 18 which embraces
49 are placed under the radial arm 50 and at right angles
the integral lug 2%, as shown in FIGURE 2.
to it. The yoke 51, which is slidably mounted on the
Under certain circumstances, however, as when it is
arm 50, holds the motor 40 at the proper forward angle
desired to perform an operation resulting in an angled
so that a cutter will correctly notch the workpieces 49
rabbct strip, or perhaps a rafter notching operation, it 5'
as it is pushed back and forth over tiem. As may be
is then necessary to tilt the motor (and its associated
seen in FIGURE 1, the side members are adjusted to
cutting element) rearwardly or forwardly, respectively,
that is to say, the motor 4% is angularly pivoted with
respect to its supporting yoke; and it is in such situa
tions that the inherent features of the present invention '7
may ?nd more particular utility.
For example, and as shown more clearly in FIGURE 4,
in order to perform an angled rabbeting operation in the
work 47 (by means of a suitable cutting element denoted
by the numeral 46), it is necessary to tilt the motor rear~ :
wardly (or backwardiy); and it will be appreciated,
naturally, that the motor 40‘ will be so tilted (or pivoted)
and then lowered as to obtain (not only the proper
angular relationship) but the proper depth of cut as well.
During this time, when the motor 40 is being so positioned
by the operator, the adjustable members of the safety
guard (namely, the side members 3i) and
and slide 1'7 )
may be raised, that is to say, temporarily positioned or
secured out of the way; and thereafter, the side members
34} and 31 (as well as the slide 17) may be lowered and I‘
positioned such that the respective lower edges of the
side members 3%) and 31 sufficiently clear the top surface
of the work 47. It will be appreciated that in this manipu»
lation of the side members 3%) and 31 and slide 17, that is
to say, suitably lowering and positioning these elements
as aforesaid, that the side members 353 and 31 may be
pivoted (upwardly as in FIGURE 4) about the bolts 36
and 37, respectively, and that simultaneously, the slide 17
may be pivoted about bolt 24 so as to obtain, as an end
result, the proper location or positioning of the side '
members 30 and 31.
It will be further appreciated, of
course, that the aforesaid pivoting action, in combination
with the slotting arrangements, the latter comprising (for
example) slot 34.1 in side member 3% and slot 26 in ver~
tical flange 15, provides in effect an almost in?nite num
ber of adjustments so as to ultimately accommodate the
proper disposition of the elements (3%, 3!. and 17) with
respect to the motor 49, cutting element 46, and work 47.
Consequently, it will be appreciated that depending upon
a number of factors, such as the angle of tilt, depth of
cut, width and diameter of cutter, and which of the thumb
nuts are ?rst tightened (29 on the one hand, or 33 and
39 on the other hand), that the slide 17 (when secured by
the stud 21 and thumb out 2:’; to the lug 28) may be
substantially normal to the plane of the plate 10, or more
often than not, may be disposed at a slight acute angle
with respect to the normal of the plane of the plate it},
as shown more particularly in FIGURE 4.
Although the tightening of the thumb nut 20‘ tends to
draw the slide 17 flush against the front face of the
lug 28, nevertheless, in this position, either the slots 34'
and
move the bolts 36 and 37 to the rearmost position
within the slots 26 and 27 (respectively) until their mo
tion is arrested, or else the front surfaces of the ?anges
1S and 16 of the top plate 16 contact the front inner sur- '
pass over the workpieces with a slight clearance.
In this
rafter notching operation, as distinguished from the afore~
said angled rabbeting operation——~and again depending
upon a number of similar factors-the tightening of the
thumb nut 29 holds the slide 17 against the front surface
of the lug 28 such that the slide 17 will probably be
substantially normal to the plane of the plate 10v (as
shown in FIGURE 1) or perhaps may be disposed at a
slight acute angle with respect to the normal. This al
lows a large cutter to ‘be used, inasmuch as any adjust~
ment of the side protective members 30 and 31 will not
move their front portions inwards towards the cutter,
these members pivoting about the bolt 24 at the bottom
of the slide 17. When such an adjustment is made and
the side members 30 and 31 are pivoted upwards about
the bolt 24-, the ‘bolts 36 and 37 slide forwardly in the
slots 26 and 27, respectively.
Moreover, it will be further appreciated from a close
inspection of FIGURE 1, that the safety guard may be
so adjusted that the side protective member 39 (that is
to say, ‘the “leading” side protective member) is substan
tially parallel to the top surface of the workpiece 49;
while the other side protective member 31 (designated in
this case as the “trailing” side protective member) may
be so adjusted as to be parallel to the cutter and hence
to the notch being made in the workpiece 49. There
fore, it will be appreciated that the side protective mem
bers 39 and 31, while usually being coplanar, are not
necessarily so; and FIGURE 1 illustrates a particular in‘
stance Where it is possible (within limits) to so adjust the
safety guard that the side protective members 30 and 31
are slightly skewed with respect to each other. This
feature of the present invention enhances the inherent
safety of the guard, inasmuch as the maximum degree
of coverage, which is synonymous with maximum safety,
may ‘be provided. Besides, such an arrangement further
prevents chips from being thrown towards the operator.
In addition, the slot 44 allows the plate 10 and hence
the overall guard to be rotated (within limits) about the
motor 40, thus providing a desirable degree of versatility.
FIGURE 1 illustrates a “rafter notching” operation,
wherein (looking into the radial arm 59) the motor 4!} is
tilted to the right or “forwardly.” In FIGURE 4, an
“angled rabbeting” operation is illustrated.
Here, the
motor 40 (and its associated cutter 46) are tilted to the
left or “rearwardly.” In FIGURE 1, the slide member
17 will usually be normal to the top plate 10 and, of
course, to the front face or surface of the integral lug 28.
In FIGURE 4, however, the slide member 17 will usually
make a slight obtuse angle with respect to the top plate
10. The inherent utility of the present invention lies in
its extreme versatility and in its ability to provide a
maximum vdegree of protection or safety coverage in each
of the various positions to which the motor 40 may be
3,068,919
5
adjusted. Moreover, the maximum safety is provided
commensurate with overall compactness, so that the
guard does not interfere with the operator, nor with the
size of the cutter 46.
The side protective members 30 and 31 are ordinarily
“co-planar” with respect to each other, but not necessarily
so. In a “normal shaping” operation, such as is illus
trated in FIGURE 3, the axis of rotation of the cutter
46 (and the motor 40) will be vertical, that is, normal
cutter) may be traversed along the radial arm 50, it being
recalled that the motor 40 had previously been tilted for
wardly. 1On the other hand, in performing an angled r-ab
Ibeting operation as illustrated in FIGURE 4, the motor
40 is tilted rearwardly; and for relatively short pieces
of the work 47, the motor '40 may be traversed along the
radial arm 50 in the same manner as that for the rafter
notching operation. FIGURE 4, then, may represent the
view that is presented when looking directly ‘into the
to the workpiece; and in this position, the side protective 10 end of the radial arm 50 of FIGURE 1 (and into the end
members 30 and 31 are in a sense “aligned” with each
other, such that their bottom and top edges are substan
tially co-planar with respect to each other, with the bot
tom edges having a slight clearance with respect to the
workpiece. Now, suppose a different operation is to be
performed on the machine, say an operation which re
quires the axis of rotation of the cutter 46 to be tilted
either rearwardly or forwardly. In FIGURE 4, the
motor 40 is tilted “rearwardly,” or to the left as viewed
in FIGURE 4, with the machine positioned for an
“angled rabbeting” operation. The side protective mem
bers are aligned with each other, with the top and bottom
edges being coplanar, and with a slight clearance exist
ing between the bottom edges and the workpiece 47; and
the slide 17 is slightly skewed with respect to the top plate
10. If the machine is adjusted for a “rafter notching”
operation, as is shown in FIGURE 1, the motor 40 is
tilted “forwardly” or toy the right looking into the radial
of the work 47); but of course it should be understood
that for relatively long pieces of work (which is prob—
ably the general case), that the yoke 51 and motor 40
may be indexed or pivoted 90° with respect to the ra
dial arm 50 (in a manner well-known in the art) such
15 that the yoke 51 may be locked into place, while the
work 47 is itself pushed along the surface 48 by the
operator.
In summary, then, the safety guard of the present in
vention has the following main advantages: ?rst, means
are provided whereby the elements of the safety guard
may be adjusted so as to compensate for any required tilt
of the motor 40 with respect to the work, thus allow
ing the side protective members 30 and 31 to be ad
justed parallel to the top surface of the work with just a
slight working clearance therebetween; secondly, the side
protective members 30 and 31 may (if desired) be indi
vidually or independently adjusted so as to be slightly
skewed (‘Within certain limits) with respect to each other,
arm 50. In this position, the slide 17 will more than
likely be perpendicular to the top plate 10, and the top 30 that is to say, the leading side protective member may be
adjusted parallel to the top surface of the ,workpiece,
plate 10 will itself be skewed slightly with respect to
while the trailing side protective member may be ad
the horizontal plane, but nevertheless, still perpendicular
justed
parallel to the cutter, thus enhancing the degree
to the axis of rotation of the cutter 46. Moreover, the
of safety; thirdly, the entire safety guard may be rotated
“leading” side protective member 30 is parallel to the top
horizontal surface of the workpiece 49, while the “trail 35 (or-pivoted) about the motor 40 (by means of the slot
44), thus enhancing the overall versatility of the guard;
ing” side protective member 31 is tilted to correspond to
fourth,
the safety guard does not reduce the space in
the tilting of the motor 40 and its cutter 46. The side
which the cutter may rotate when the guard is tilted in
protective members 30 and 31, in this position,,Wlll not
be aligned, nor will their'top and‘ bottom edges be co
planar with respect to 'each other.,,'1'his is one of the
features of the invention. 'The side protective members
30 and 31 may be individually adjusted both with respect
v relation to the cutter; and ?fth, the safety guard is easily
adjustable, and when adjusted, does not protrude so far
as to interfere with the movements of the operator.
While I have disclosed my invention in the best form
known to me, it will nevertheless be understood that this
is purely exemplary and that modi?cations may be made
to each other and with 'respect'to' the top plate 10, as is
shown by the difference in the vertical shading between
departing from the spirit of the invention, except
the leading side protective member 30 and the trailing 45 without
as it may be more particularly limited in the appended
side protective member 31 in the position illustrated in
claims wherein I claim:
FIGURE 1. The top ‘and bottom edges of the leading
1. In combination with a rotary cutter having a ver
side protective member 30 are parallel to the top surface
tical axis of rotation, a safety guard comprising, in com
of the workpiece 49, that is, these edges lie inia hori
bination, an ordinarily-horizontal top plate secured
zontal plane, while the top and bottom edges of the trail 50 above said rotary cutter, a slide member adjustably
ing side protective member 31 are skewed with respect
clamped to said top plate and depending therefrom, said
to the horizontal plane, actually being parallel to the
slide member being disposed radially of the cutter and
skewed top plate 10 and thus perpendicular to the axis
having a substantially perpendicular adjustment with re
of rotation of the cutter 46. Consequently, a maximum
spect to said top plate and a pair of side protective mem
degree of coverage, which is herein synonymous with 55 bers including respective forwardly-disposed portions hav
safety, is provided in the rafter notching operation shown
in FIGURE 1.
Naturally, it will be appreciated that any adjustment
which necessitates a tilting of the side protective members
30 and 31 (forwardly or rearwardly relative to the plane
of the top plate'ltl) will not lessen the space in which
a cutter may revolve within the safety guard. For ex
ing said slide member pivotally secured therebetween and
further including respective rearWar-dly-disposed portions,
each having a vertical slot formed therein, and means in—
cluding a fastening member passing through each of said
slots to pivotably clamp said side protective members to
said top plate, whereby each of said side protective mem
bers may be individually adjusted with ‘respect to each
ample, for the rafter notching operation illustrated in
other and with respect to said top plate.
FIGURE 1, the slide 17 does not swing inwardly appreci
2. A safety guard for a woodworking machine of the
65
ably, with the result that the slide members 30 and 31
type including a vertically-disposed motor having a gen
are held away from the cutter; and by the same token,
erally cylindrical motor housing and further including a
for the angled rabbeting operation illustrated in FIG
rotary cutter driven by the motor and depending there
URE 4, the slide 17 does not have its top portion pro
from, said safety guard comprising, in combination, an
truding so far away from the safety guard as to otherwise 70 ordinarily-horizontal top plate, an arcuate bracket ex
tending upwardly from said top plate and including an
interfere with the operator.
arcuate slot parallel to said top plate, means extending
It will be further appreciated, of course, that in per
through said slot in said arcuate bracket to adjustably
forming a rafter notching operation as illustrated in
clamp said arcuate bracket to the motor housing, a lug
FIGURE 1, that the work 49 may remain stationary,
while the yoke 51 carrying motor 40 (and naturally the 75 projecting radially and downwardly from said top plate
3,068,919
and having a front surface substantially normal to said
top plate, a pair of vertical ?anges depending from said
top plate on either side of said lug, a slide including a
rearwardly-facing channel, said slide being slidably posi
tioned upon said lug and having a depending portion
intermediate said pair of vertical ?anges, manually
manipulatable means to adjustably clamp said slide to
said lug, each of said pair of vertical ?anges including a
rearwardly-disposed portion having a respective hori
zontal slot, a pair of side protective members including 10
respective forwardly-disposed portions having said de
pending portion of said slide pivotally secured there
between and further including respective rearwardly
disposed portions each having a vertical slot, and a pair
of manually-manipulatable fastening means, one each
passing through a respective one of said vertical slots
and a respective one of said horizontal slots to ad
justably clamp each of said pair of side protective mem
bers to said top plate, whereby each of said pair of side
protective members many be individually adjusted within
certain limits with respect to said top plate.
3. The combination according to claim 2 wherein said
motor has a circumferential groove formed in its lower
end and wherein said top plate has an inner semicircular
edge which extends into the circumferential groove in
said motor.
4. In combination with a rotary cutter having a nor
mally vertical axis of rotation and means to adjustably
tilt the axis of rotation in at least a single plane, a safety
guard surrounding at least a portion of the cutter, said
safety guard comprising a ?xed ?at substantially-hori
zontal member on and tilting in unison with the tilting
of the cutter, a slide member, means to adjustably mount
said slide member to said ?xed member radially of said
cutter for movement substantially perpendicular to said
?xed member, a pair of side protective members, one
on each side of said slide member and each surrounding a
portion of said ?xed member, means to pivotably‘ secure
said slide member intermediate said side protective mem
bers, and means to pivotably secure each of said side pro
tective members to said ?xed member, said slide member
and said side protective members having a pivot axis
therebetween, and each of said side protective members
having respective pivot axes with respect to said ?xed‘
member, said last-named pivot axes being parallel to each
8
other and to the pivot axis between said slide member
and said side protective members, and all of said pivot
axes being perpendicular with respect to the plane of tilt
ing of said cutter, whereby each of said side protective
members may be individually adjusted with respect to
each other and with respect to said ?xed member.
5. A safety guard as described in claim 4, wherein said
?at substantially-horizontal member has an integral radial
ly-projecting lug, said lug having a ?at face which is
perpendicular to said ?at member, a stud carried by said
lug and projecting radially of said ?at face, said slide
member having a rearward channel formed therein and‘
further having a longitudinal slot formed therein parallel
to said channel, said channel engaging said lug, and said
stud of said lug projecting through said slot in said slide
member, and a manually-manipulatable lock nut engaging
said stud, whereby said slide member may be adjusted sub
stantially perpendicularly of said ?at member.
6. A safety guard as described in claim 5, wherein each
of said side protective members depend downwardly of
said ?at substantially-horizontal member.
7. A safety guard as described in claim 6, wherein said
?at substantially-horizontal member has a pair of ?anges
depending downwardly therefrom, one on each side of
said lug, each of said ?anges having a rearward horizontal
slot formed therein away from said lug, each of said side
protective members having a rearward vertical slot
formed therein, and wherein respective fastening means
including manually-manipulatable lock nuts are provided,
said fastening means being operative through said vertical
slot in said respective side protective member and said
horizontal slot in said respective ?ange of said ?xed mem
ber, whereby said side protective members are pivotably
secured to said ?at member.
References Cited in the ?le of this patent
UNITED STATES PATENTS
694,835
720,039
‘907,734
2,258,828
2,785,716
2,841,194
Cook ________________ .._ Mar. 4,
Lemmon _____________ __ Feb. 10,
Butter?eld ___________ __ Dec. 29,
Trebert ______________ __ Oct. 14,
Lutton ______________ __ Mar. 19,
Koberle _______________ __ July 1,
1902
1903
1908
1941
1957
1958
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