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oct; Y22, 194s.
F. D. wuLFF
2,409,921 ~ '
Filed Nov. 25, 1944
j." ,3
Patented Oct. 22, 1946
PATE-NT Aorifice ’
`Framing Wulff, chieagem.
Application November 23, 1944. serial No. 564.336
(c1. ss-‘isn
. The present invention l.relates to devices for
intermediate part of the member-I is provided
setting or gauging the relation of cutting blades
of lawnmowersand the like.
. I
i i
an elongated slot B.
The member 2 has at its ‘lower end laterally
extending and reversely curved guide flanges 1
and 8 adapted to encompass the edge portions of
`Among the objects of the invention is to pro
vide a novel gauge-type setting device for even
ing the setting or relation of the rotary blade or
the member I and to slide along the same. Near
or at the lower end of the member 2 is provided
blades with respect to the stationary bladef or
the like of a lawn mower, and comprising rela
a laterally orrearwardly extending toe part or
projection ElV which may have a flange or leg IIJ
-tively adjustable parts of which one part may
be contacted with the stationary bladeand the
other part contacted with the shaft of the rotary
blade means whereby both ends of the blades
may be adjusted to be even and in accordance
suitably secured to _the member 2. At theup
per end ofthe member 2 is provided a laterally
extending ñnger‘or flange part I I which serves
asa linger coordinately with the flange 5. By
with the adjusted setting of the gauge.
i l
pressing the finger pieces 5 and II, between the
Another object of the invention is to provide 15 thumb and finger-of the user, the members are
a novel device of the character disclosed V_and
caused to relatively slide.
which may have also contacting means on one of
At an intermediate part the member :2 has `a
the members which may be set against- the edge
of the rotary blade to gauge the position of the
contacting member to contact the Vcutting edge
of the stationary‘blade and still have the other
contacting member in contact with theV shaft,
threaded element I2, which may be in the form
of a nut,` suitably» secured to the member 2 as
20 by way of solder I3 or the like. This element I2
' is located to have its threaded part opposite the
slot „5 and asuitable hole I4 provided in the
member `2. In threaded'enga‘gement with this
element I2 is _the threaded stem I5 `of a ñnger
the contacting surfaces of the two ñrst-mentioned
contacting elements being in a common plane.
OtherA objects, advantages, capabilities, features
and the like are-comprehended by the invention
25 clamp having' a linger piece I6 and a thrust col
lar or head I1 adapted to clamp on the member
as will later appear and as are inherentlypos
I, the stem I5 passingthro'ugh the slot 6 and
by thebriefly
to the drawing:
. .
the >opening'lll, as's’howmto hold the members I
and' 2 in adjusted relation.
Fig. 1 is a side View in elevation of the»` device; 80
constructed in accordance with the ?invention; ì
The device is particularly >adapted to be used
1» with the cutter means of a lawnV mower or vthe
Fig. 2 is a front view thereof;
like,l and, >as'shìmvr’i-in4 Fig. 1, such means com
Fig. 3 is a rear view thereof;
prises a relatively ‘stationary blade I8 carried by
Fig. 4 is a' part sectional view, on an enlarged
or fixed to a blade holder I 9 supported on a shaft
scale, taken in a plane represented by line 4-4 35 20 carried by the frame 2I of the mower. The
in Fig. 3 of the drawing;
frame 2| also carries a bar 22 which may be ñxed
Fig. 5 is a transverse sectional view taken in a
to the frame and in «this bar are adjusting screws
plane represented by line 5_5 in Fig. 3 of the
23 the ends of which are adapted to engage sad
dles or shoulders 24 provided on the holder I9,
Fig. 6 is a perspective view of a part of the 40 as shown in Fig. 1. By adjusting the screws 23,
device; and
the angular relation of the holder I9 and the
Fig. 7 is a perspective view of another part of
blade I8 relative to the axis of the shaft 20 may
the device.
be had as desired so that the blade I8 will be
Referring more in detail to the drawing, the
in proper shearing position for the cutting blades.
device is shown as comprising a pair of relatively 45 On the frame 2| is also mounted a shaft 25 for
slidable elongated members I and 2 of which the
rotatably carrying a rotary blade holder 26 to
member I. has at its lower end a heel part 3,
which is secured one or more blades 21, the cut
adapted to contact the edge of the stationary
ting edge 28 of which travels in a circular path
blade when in use as later explained, and a lat
represented byv the arrows 29 to have shearing
erally extending toe part 4 adapted to contact 50 function with the cutting edge 30 of the station
the upper face of the cutting edge of the sta
ary blade I8, as shown in Fig. 1.
tionary blade adjacent its cutting edge, and at
The device of the present invention is used to
its upper end with a laterally extending finger
gauge the relation of the cutting edge 30 in
or ñange part 5 to serve as a iinger piece when
proper shearing relation with the cutting edge
adjusting the device as later explained. At an 55 28. 'I‘his is eifected by ñrst adjusting the position
tion for longitudinal sliding movement with
of an end of the blade I8, by way of adjusting
the screws 23 at each end of the blade I8, so that
the corresponding end of the blade 21 will have
the desired position or shearing relation of the
cutting edges 28 and 3i). Then the device of this
invention is applied in place by resting the toe 4
on the cutting edge 30 and then by moving the
member 2 with the guide '1_-8 upward along the
respect to each other, one of said members hav
ing a laterally-extending toe adjacent the lower
end thereof with a flat lower surface adapted to
be placed on the upper surface of the stationary
blade of the mower and having a laterally-ex
tending finger piece at the upper end thereof; the
otherof said members being of lesser length than
said first _mentioned member and1 having a
memberll; to bring .the> toe 9 into contact `_with
the shaft 25, and then the screw I5-I-6 is 10 laterally extending toe adjacent the llower end
thereof disposed at that side of the assembled
tightened to hold the members I and 2 clamped
together. This device is then moved to the other t f = members opposite that from which the toe on the
first-mentioned member extends, said toe of the
end of the blade |18 to place the toe 4 `on xther
second-mentioned member having a flat' upper
edge Se at such end of the blade and then toe 9
isswung to position under the shaft-„25. 'Ifthe y15 surface adapted to be placed beneath the shaft
of the rotary blade of the mower, and said
toe 9 contacts the underside .of the >shaft 25., the
cutting edge 3l) is in correct position.- If thetoe
second-„mentioned member having a laterally
25 the screwsl3 areE A extending finger piece at the upper end thereof
9 is spaced below the shaft
and disposed at the same side of said member as
adjusted to raise the blade I8 until the toe 9
contacts the underside. 0f the Shaft 25,; and if the
toe 9 is too high to come under the _shaft 25 .the
screws ¿23 are >soY adjusted as to lower the blade
I8 îuntil the toe can V.come just under the shaft 25.
The device also may have fixed to the lower
end portion or heel ilV another toe 3l having its
upper surface 32 inthe same plane as the lower
surface of the toe ¿,¿and this toe 3l may Yhave a
flange 33 suitably securedto the lower end part
of the heel 3'. This toe 3l is ¿used by bringing the
upper face 32 thereof lagainst the cutting edge _2B
of the rotary blade 21 and then adjusting the toe
9 to contact with the underside of the shaft 25,
whence the lower face of the toe 4, being in the
same plane as the face 32,l will be at the correct
position to coincide with or contact the edge 30
of the blade I8.- If the edge 30 does not so _con
tact, then the screws 23y will be so adjusted as to
effect such contact. Therefore, .adjustment may
be effected in this manner at both ends `Gaf the
blade 28 and the blade 21.
While I have herein described and upon the
drawing shown an illustrative embodiment ofthe
invention it is to be understood that the inven
tion may comprehend other _constructionsy details,
arrangements of parts, features and the like with.
out departing from the spirit of the invention.
Having thus disclosed the invention, I> claim;
20 the laterally Vextending .toe thereof; one of said
members having relatively short laterally-.ex
tending, reversely curved .guide flanges .along the
side edges thereof engaging the side edges of the
other member to maintain the members in as
sembled relation and to permit longitudinal
sliding movementof said members with respect
to each other; and clamping means connected to
said members for holding them in adjusted rela~
tion, said clamping means comprising a threaded
30 part fixed to one of said members, a clamping
element threaded into said part and extending
through an elongated slot provided in the other
of ysaid members and also ‘having aclamping head
for clamping »engagement with said last-men
tioned member.
2. A gauging device as defined in claim 1 where
in the finger piece at the upper end of the first'
mentioned member is disposed at the same' side of->`
the assembled members as the finger piece at
40 the upper end of the second-mentioned mem.->
ber, whereby said finger pieces may be‘readily
engaged by the thumb and ñnger of an operator'
to effect relative sliding movement of the mem
’ bers when the clamping means is released.V
3'. A gauging device as> defined in claim «.1 where
in the first-mentioned member has a second»
laterally-extending toe adjacent >its -lower end and
LA gauging means for al lawn mower which
disposed on that side» _of said member opposite to
has a frame Carrying a relatively adjustable sta
the other toev there'onf-the upper surface of- said
tionary blade and a rotary blad-e ¿rotatable on 50 second toe being flat and ¿in the same plane as therf
a shaft _carried by said frame; `said gauging
lower flat surface of saidother toe.'
means comprising two relatively fiat and clon-.
gated members assembled in face-toeface rela?
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