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NOV. 12, 1946.
_1_ |__ TORGERSQN
2,410,955
GRINDING MACHINE FOR SHAPING WORKPIECES
Filed Oct. 25, 1944
2 Sheets-Sheet l
INVENTOR
Josep/v l. Emsa#
BY
A-rToRN EYS .
Nov. 12, 1946.
VN"MîîîîmmsizRsoN
2,410,955
GRINDIÑG MACHINE FOR SHAPING WORKPIECES
Fiied Oct. 23, 1944
2 SheeÍlS-Shee'fl 2
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INVENTOR
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AT TORNE~Y5.
2,410,955
‘ Patented Nov. 12, 1946
UNITED STATES PATENT OFFICE] f ,
GRINDINGY‘MACHINE Fon SHARING
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WoaKPIEcEs
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Joseph L. Torgerson, Milwaukee,‘Wis.
Application October 23, 1944, Serial No. '553,876I
5 Claims. (C1. 51-92)
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grinding machines.
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of the subirame movement to raise vand lower
This invention relates to improvements in
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the work to and from the grinding wheel I5. '
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Mounted‘on the subframe ll is a tiltable table
25 provided Vwith ears at 26 supported on a rod
21 which extends transversely of the frame and
upon Whichtable 25» may be oscillated. It is ad
justably fixed in its oscillatory position by a lever
It has Aparticular referencev to a structure es
pecially adapted for they sharpening of the cru
ciform blade of a meat grinder, but many of `its
features are also adaptable to other grinding
problems.
28 extending from its forward margin Vand pro
vided With a clamp screw-:29 operating'in a seg
ious adjustments and movements of a blade with 10 ment 30. 'n It` is the function of table 25 to de»
1t is the object of the invention to povide a
novel, improved and simpliiied form for the var
‘termine with accuracy the angle at Which the
facesy of the respective blades of the work pieces
respect to a grinding wheel, and to make the
achievement of the requisite movements as easy
will be ground. `
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and simple for the operator as is possible.
The table 25 isvprovided, as best showninFigs.
The objects Will appear' in moredetail to those
skilled inthe art upon analysis of the 'following 16 4 and 5, withgibïmeans'32, constituting aguide
disclosure of the'invention.
In the drawings:
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way Vupon which the slide 133 is' reciprocable to
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and from the main frame. Reciprocation is
manually effected and controlled -by a hand lever
34 pivoted to the' slide at 35 and provided with
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Fig. 1 is a’side elevation of the machine em
bodying the invention. '
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a movable ‘gfulerum at >35 Yupon a link> 31 pivoted
at -3-8_'to`the table 25l (see Figs. 2 and 3'). "
The crossr slide 33 may be‘provid'ed with an
Fig, `2 is a plan View of the machine shown in
Fig. 1.
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Fig. 3 is an enlarged detail View in plan of
the Work in place upon its work support.
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Fig. ‘iis a side elevation of the structure shown
in Fig. 3.
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25
is a `function of this slide. toreciprocate beneath .
Fig. 5 isa detail view> taken in section on the
line 5-«5of Fig. 3.
adjustable stop at 39 engageable with the gib
means-3.2 to limit A"the movement of the slideto'
ward'the grinding -Wheelïand themain frame» It
the grinding Wheel l5 the blade to be ground and,
if desired, to bring the edge of another blade
into contact with the wheel.
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Fig. 6 is a plan View of a Work piece in oper
ative, relationtogthe grinding Wheel (illustrated
On the slide 3_3 a cup-shaped supportßllßis cn->
in broken lines) ..
gaged by the inverted cup-shaped Work carrier
Fig; ‘l is a view__iragmentarily illustrating the
4l, the coacting parts of these members being of
grinding wheel in side elevation and showing in
circular cross section to permit of the indexing of
section the blade operated on thereby, the rest
the work carrier 4| with respect to its support
oi the’knife assembly being indicated in broken
45. The nxtures 42~ and the square plug 53 on
lines in proper relation tothe blade upon which - v»the
face of the Work carrier are made to receive
the Wheel is acting.
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land. position the work piece 45 which, as shown,
Fig. 8 is a plan view‘of the sharpened work
is a cruciform article, having four blades 46 re
piece.
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Like parts are designated with the same ref
erence characters throughout the ¿several views.`
quiring grinding on the surfaces 4l and 48' (see
40
Figs. 7 and 8).
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The indexing work carrierY 4l has, on. its outer
The machine ccmprise's a main frame yat lllpro
periphery, a number of lugs at 49 corresponding
vided with bearings at »il and i lzlfor the’ Shaft
to a number of «bladesk requiring sharpening.
I3 upony which the grinding wheel l5 is sup'
`Surrounding theA cup-'shaped support 40 isa gage
ported. >Pivoted from vthe mainframe by means: 45 ring 53 provided with a handle 54 yandwitha
of a bar I6 is a subframe Il'which has oscilla
tion in a vertical plane limited by the nut I-8
adjustably threaded on a stop bolt I9 operating
clamp bolt 55 extending through the slot 56 into '
threaded connection with the slide 33. When the
clamp bolt 55 is loosened, the handle 54 may be
through a bracket 20 projecting from the main
used to adjust the position of ring 53 to that
frame.
50 point where its stop `5l will be engaged bythe
successive lugs »45 of the work carrier in position
The free forward end of the subframe, from
of the carrier in which the respective blades l46
which the stop boltl i9 depends, is raised by a'
of the work piece are accurately positioned for
foot pedal 2l in the ‘form of a lever having a
engagement by the grinding Wheel.
connection to the subframe through the turn
buckle 22, as shown in Fig. 1. It is the purpose 55 >The work piece being positioned on the fix
2,410,955
4
tures 42 of the carrier 4|, and the carrier 4| being
guideway, handle means for reciprocating the
manually indexed to engage one of its lugs 49
with the stop 51, it will be found that one of the
blades of the work piece Will bear properly pre
determined relation to the grinding Wheel |5.
slide, and a work carrier provided with an index
mounted upon the slide.
This relationship is predetermined, as above in
2. The structure of claim 1, in which said han
dle means comprises a lever centrally in pivotal
connection with the slide and having a fulcrum
dicated, by the indexing of the positioning ring
connection with a link, said link being pivoted
53; and by the tilting of the table 25.
to said table.
3. The structure of claim 1, in which said slide
The sub-frame |1 is now oscillated to move
the Work piece upwardly, this being done by pres 10 is provided with a support on which the Work
sure of the operator’s foot on the pedal 2|. The
carrier is rotatably mounted, and the work car
exact ultimate position may be predetermined
rier is provided With a stop, said slide having an
arcuately .extending stop member provided with
by the limit nut |8. With the subframe raised,
the operator now draws the handle 34 to the ' `stop means for coacting with the stop of the work
right, as viewed in Fig. 3, thereby advancing slide 15 carrier, said member being adjustably mounted
33 to draw one of the blades 46‘beneath the
on the slide and having clamping means for main
grinding wheel. The operator himself Will reg
taining its adjustment angularly about the work
ulate the extent to which the entire length of
carrier.
the blade may be passed beneath the wheel.
4. In a device of the character described, the
Ordinarily, more than one traverse will be made 20 combination with a main frame and a grinding
and, in the ñnal traverse, the slide 33 may be
given the extreme movement permitted by, stop
screw 39, thereby bringing the edge 48 of an
other blade into contact with the side face of the
wheel |5„as shown in Fig. 6.
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The surface 41 of the blade closest to the wheel
and the edge 48 of the next consecutive blade of
the work piece having now been ground, theop
erator will release pressure on the pedal 2| to
allow the subframe to be lowered to the position
wheel provided with means operatively support
ing it from said frame, of a subframe in pivotal
connection With’said frame atV a point remote
from’said wheel, said subframe having a portion
25 adjustable to and from the Wheel, means includ
ing a foot pedal and link for actuating said sub
frame portion toward the wheel, a stop bolt in
pivotal connection with the subframe 4and pro
vided with a stop nut, said frame having bracket
30 means with which said nut is engageable where
illustrated in Fig. 1, whereupon he will manually
lift the' indexing Work support 4| sufficiently to
enable its lug 49 to clear the stop 51. He will
thereupon index „the support V90"` to engage its
by adjustably to limit the approach of said sub
frame portion to said wheel, a table provided with
grinding of the blades. Moreover, the grinding
tion of said slide respecting the table, a circular
support upon the slide, a st‘op'ring disposed upon
a transverse pintle pivotally connecting the table ,
with the> subframe, a lever on the table,A a seg
next successive lug With the stopl 51, thereby posi 35 ment on the subframe With which said lever
tioning another blade to be operated on by the
coacts, clamping means for adjustably securing
wheel. The cycle of operations,'as above de
the lever to the segment whereby adjustably to
scribed, is then repeated.
ñx lthe ltilted position of the table respecting the
When the device has been properly set in the
subframe, means providing a transverse guide
manner aboveA set forth, it will be apparent that .49 Way on the table, a slide> reciprocable on said
guideway, stop means for limiting the reciproca
n0 skillwhateveris required to` achieve> perfect
may be effected very rapidly, the operator’s left
the slide about the support, means for adjustably
hand controlling the lever 34,*his foot controlling
the pedal 2|, and hisY right hand remaining avail 45 determining the angular position of the stop
ring respecting the slide, a work carrier rotat
able for indexing the work support and‘position
ing and removing the `Work pieces.
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claim:
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1. In a device of the character described, the
combination with a frame and a tool' operatively
supported therefrom, of a fulcrum bar project
ing laterally from the frame, a subframe pivoted
on said bar and having a portion pivotally mov
able to and from said tool, means for actuating
ably adjustable upon the support, said ring and
,carrier having means interengageable in select
ving indexing positions of the carrier, and ñxture
0 means on the carrier for supporting aserles of
blades to be successively indexed into operative
position beneath said vvvhe’el to be sharpened
thereby, the movement of said slide carrying a
selected blade longitudinally beneath 'the Wheel
said portion comprising a pedal and> motion 5,5 `at an angle determined by the tilt of the table
and a level determined by said stop nut and
transmitting connections from the pedal tosaid
subframe, stop means adjustable between _ the
bracket `when said subframe portion-> is elevated
by said pedal.
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subframe and the frame-for limitingthe pivotal
n 5. 'I‘he device of claim 4, in further combina
movement of the subframe, a table, pintle means
pivotally connecting the table to .the subframe 60 ltion with slide actuating means comprising a link
whereby-ï said table is tiltable res'pectingfísaid
Apivoted to the table, and a hand lever fulcrumed
tothe link and Aprovided with a pivotal connec
subframe, clamping meansior ñxingthe'posi
tion to the s1ide.` `
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tion of tilted adjustment of the table respecting
the subframe, means `providing.aguidevvay trans 65
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JOSEPH L. TORGERSON.
versely of the table, a slide reciprocableupon the .
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