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Патент USA US2411814

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Nov. 26, 1946.
‘
L. scusA GAUGE
2,411,814
FINISHING
'
Filed ‘Sept. 26, 1944
2 Sheets-Sheet 1
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INVENTOR.
BY
Lino Scusa.
Nov. 26, 1946.
2,411,814
L. SCUSA
‘
.GAUGE FINISHING
Filed Sept. 26;, 1944
2 Sheets-Sheet 2
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F|G.6
FIG. 7
INVENTOR.
uNo scusn
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A‘r-ronnEY
‘
2,411,814
Patented Nov. 26, 1946
UNITED STATES ‘PATENT OFFICE.
Application September 26, 1944, Serial No. 555,825
12 Claims. (01. 51--124)
2
1
The invention relates to improvements in gauge
?nishing, and. is particularly adapted for ?nish
ing to smooth, planar and parallel form the op
posed work contacting faces of the anvil por
tions or elements of snap and other gauges.
The general purpose of the invention is to pro
vide an efficient, economical and time-saving
method and apparatus whereby a gauge having
an un?nished work contacting or anvil surface
which desirably should be smooth and truly
planar, may be so treated as to ?nish said sur
face of the gauge to the ‘desired condition, and
whereby an un?nished snap or other gauge having
two opposed work contacting or anvil surfaces
Figure 6 is a top plan view of the apparatus;
Figure 7 is a detail view showing a portion
of the gauge supporting and manipulating means
in elevation with a part thereof broken away
for clarity of illustration of certain details of
constructions; and
- Figure 8 is a detail sectional view on line 8—-8
of Figure 7.
The apparatus shown has a hollow base frame
portion Ill provided with a horizontal top wall;
Three electric motors I l are mounted within the
base portion [0 with their drive shafts extending
vertically. Each motor is rigidly held to the base
portion by a suitable supporting means 12 with
may be so treated as to bring said two surfaces 15 the motors equally spaced around a common ver
tical axis passing centrally through the base por
into true parallelism and bring each of said sur
tion. The drive shafts of the motors extend '
faces to a smooth and truly planar condition.
vertically, are equidistant from said common axis,
A further purpose of the invention is to ac
and are connected at their upper ends by known
complish the aforesaid ends by grinding and
polishing the work contacting surfaces of an 20 ?exible driving couplings I4 with the lower ends
of different ones of three upstanding shafts l5.
otherwise structurally complete gauge.
Three upstanding shaft-supporting sleeves I6
A further purpose of the invention is to pro
are adjustably held to the base portion H) with
vide for e?icient, rapid and easy manipulation
said sleeves equally spaced around and from the
of the un?nished gauge for separately ?nishing
?rst one and then the other of the two opposed 25 aforesaid‘ axis around which the motors are
spaced. The shafts I5 extend through the sleeves
or oppositely facing ‘work contacting or anvil
l5, and each sleeve carries at its upper and lower
faces of the gauge in a series of stages to a
ends suitable ball bearing journaling means I‘!
very smooth and truly planar condition.
and I8 for the shaft which extends through the
A further purpose of the invention is to provide
sleeve.
an ef?cient apparatus for accomplishing the
The lower end portion of each sleeve extends
above ends in an easy and time saving manner,
loosely through a different one of three circular
which apparatus preferably includes means
apertures l9 ‘formed ‘in the top wall of the base
whereby it may be easily kept in condition for
e?icient operation.
‘
portion 10, the diameter of the apertures being
Other purposes and advantages of the inven 35 greater than that of the sleeve portion extending
through the aperture. Above the- said topwall
tion will appear from the following description in
each sleeve is formed with an annular external
detail of the construction and mode of operation
flange 20. Three stud bolts 2| extend through
of a preferred form of apparatus embodying the
the ?ange 28 of each sleeve, and each such bolt’
invention.
has a lower screw-threaded end portion screwed
In the accompanying drawings:
into a different one of three threaded holes pro- ,
Figure 1 is a view, partly in vertical section, on
vided in the top wall of the base portion at points
the line l--—! of Figure 6, showing a preferred
equally spaced around the sleeve. Three set
form of apparatus embodying the invention;
screws 22 are screwed through equally spaced
Figure 2 is a detail sectional view on the line
2—2 of Figure 1;
I 45 threaded apertures in the sleeve ?ange 29 with
their lower ends bearing against the upper sur
Figure 3 is a detail sectional view on the line
face of the top wall of the base portion 10, the
3—3 of Figure 1;
set screws and bolts alternating around the sleeve
Figure 4 is a detail view showing in elevation
‘as shown. By adjusting the bolts and set screws
one of thethree adjustably mounted bearing
sleeves hereinafter described for the three shafts 50 the several shafts l5 and their supporting sleeves
16 may all be brought into exact parallelism.
carrying the three ?nishing wheels of the ap
.The apparatus has three different gauge
paratus, and also showing the mounting of the
?nishing wheels 23, 24 and 25 each of which is
sleeve on the main framework;
removably clamped on the reduced upper end
Figure 5 is a'plan view of the parts shown in
portion of a dilierent one of the three shafts I5
Figure 41
'
2,411,814
3
for rotation of each wheel with its driving shaft
I5.
A washer W is provided at each face of each
wheel. The wheel 23 is a coarse grinding wheel,
the wheel 24 is a ?ne grinding wheel, and the
wheel 25 is a lapping or polishing wheel. The
three wheels are supported for rotation in one
and the same general horizontal plane, and each
wheel has its upper and lower faces annularly re
cessed between its axis and perimeter for a, sub
I
4
arranged for adjustment of the wheel grinding
elements and of the gauge supporting elements,
hereinafter described, both axially and trans
versely of the crank shaft axis.
A sleeve 38 embraces the rod or post 31 for
axial sliding adjustment of the sleeve along the
post. A vertical rack 39 is pendant from and
fixed to the arm 32, as by having the upper end
of the rack ?xedly secured in a notch in the
stantial portion of the radial dimension of the 10 arm by ‘a screw or bolt 40. The rack extends
downward alongside of, but spaced outwardly
wheel to provide an annular active face portion
from, the sleeve. A yoke 4| has its side arms.
at each face of the wheel, which active face por
?xed to the sleeve with its crossbar contacting
tions in the construction shown have their outer
the outer face of the rack to brace the rack.
edges at the periphery of the wheel. The twov
The teeth of the rack project toward the sleeve,
15
annular face portions F—F’ of each wheel are
or the path of movement of the sleeve, at the
flat and are in parallelism.
inner face of the rack. A pinion 52 is ?xed on
The following described means are provided
a shaft 43 which is journaled in the side arms of
for truing up the active face portions F—F' of
yoke Ill with the teeth of the pinion in mesh with
the Wheels initially, and also periodically as the
wheels become worn, and for supporting and ma 20 the teeth of the rack, said pinion being located
nipulating a gauge to ?nish its work-contacting
face portions.
between the rack and the sleeve.
The pinion
shaft 153 has a hand wheel 44 ?xed on one end
thereof for rotating the pinion to adjust the
A short vertical shaft 26 extends through the
sleeve 38 up and down on the post or rod 31.
center of the top wall of the base portion ID
of the framework and is journaled in suitable 25 The inter-engagement of the yoke, rack, pinion
and sleeve prevents rotation of the sleeve about
bearing means 27 carried by said wall. A large
the rod or post 31.
hand wheel 28 is ?xed on the upper end of this
For micrometric ?nal and exact adjustment of
shaft for oscillating or conversely rotating the
the
vertical position of the sleeve 38 relatively
shaft. The shaft and hand wheel are held
against axial movement, a hardened washer 29 30 to the rod 31 and the ?nishing wheels, a resil
ient split clamping collar 45 is slidably mount
being interposed between the hub of the hand
ed on the rod 31. A hand screw 46 connects
wheel and the upper end of bearing means 21,
the split ends of the collar for releasing the grip
and a hardened washer 39 being interposed be
of the collar on the rod 31 to permit the collar
tween the lower end of said bearing means and
a retaining nut 31 which is threaded on the lower 35 to slide with the sleeve 3.8 when the pinion 42
is rotated, and. also to clamp the collar immov
end of shaft 26.
ably to the rod for ?nal micrometric of the
A‘ short horizontal arm 32 has ?xed thereto
sleeve, as desired. A helical spring 4'! sur
a pivot pin 33 which is journaled in a bearing
rounds the rod and abuts the adjacent ends of
hole 34 formed in the inwardly extending upper
the
collar and sleeve. A micrometer screw 48
40
end portion of a bracket or standard 3.5. The
is threaded through the collar, and the lower
bracket 35 forms part of the ?xed framework
end of said screw abuts the outer arm of a two
of the apparatus, said bracket being of substan
armed lever it. This lever is fulcrumed at 5i!
tially inverted L-shape and having its lower end
on the collar with its inner arm engaged under
detachably ?xed to base portion It by bolts 36.
a lip or projection 5| formed on the upper end‘
Pivot pin 33 and shaft 26 are coaxial, and the
'of the sleeve. A ?nger wheel 52 is ?xed to the
common axis about which this pin and shaft
micrometer screw for turning the screw to effect
turn is the above mentioned common vertical
any desired ?nal adjustment of the sleeve along
axis about which the wheels 23, 2d and 25 and
the rod or post.
their drive shafts are spaced. The distance
A'vertical undercut groove or key-way 53 is
from the axis of each ?nishing wheel to this
formed in the sleeve 38 and extends longitu~
common axis of pivot 33 and shaft 2'5 is the
dinally of the sleeve and of the rod or post 37
same.
parallel to the axis of oscillation of the latter.
A vertical post or rod 3'5 has its upper end
Two superposed and horizontally extending arms
?xed to arm 32 and its lower end ?xed to the
fill and 55 are held at one end thereof to the sleeve
hub of the hand wheel 28 at points equidistant
38, each arm being formed adjacent one end
from the aforesaid common axis, the shaft 26,
thereof with a key, as 55, ?tting in key-way 53'.
hand wheel 28, post 3?, arm 32 and pivot pin 33
The lower arm 55 is preferably ?xed to the sleeve
forming, in effect, a manually oscillative crank
by a pin 5?, while the upper arm 5!? is adjustable
shaft journaled in the framework for oscilla
tion about a vertical axis. The rod or post 3.7, 60 Vertically on the sleeve and is clamped in ad
justed position by a thumb-screw E18 threaded
which forms the wrist of this hand operated
through the arm 54 and its key 56 into abutting
‘crank shaft, carries means for supporting or
engagement with the bottom wall of the key-way
holding a gauge for oscillation with the said
53. This arrangement permits relative adjust
rod or crank Wrist for ?nishing of the gauge by
the wheels 23, 24 and 25, and said rod also 65 ment of the arms 53 and 55 to Vary the extent to
which said arms are vertically spaced from each
carries grinding means for oscillation with the
rod or crank wrist to act on the wheels for so
other.
truing the active face portions of the wheels
that the uppermost active face portions of all
The arms 54 and 55 have, respectively, exten
sions 54a and 55a slidably held in known manner
three wheels will lie in a common plane normal 70
to the axis of said crank shaft and the lower—
most active face portions of all three wheels will
lie in a common plane normal to said axis. The
wheel surface truing means and the gauge sup
porting or holding means are constructed and 75
in undercut ways (such as 59) formed in the re
'
spective arms and extending horizontally longi
tudinally of the arms, so that each arm is in effect
a two-part extensible arm. The extensions 54a
and 5511 are locked in adjusted position by thumb
screws (such as 60) threaded through the arms to
abut-‘the extensions. The outervend of each‘of
so: that‘alllof‘these shafts areparallel to the
agrinding tool for truing' up the gauge-?nishing ‘
gauge is indexed from Wheel to wheel. - ‘ ='
vertical axis aboutlwhich the gauge is oscillated
said extensions carries a holding or mounting ele- I
ment for the gauge to be ?nished and also carries ' I ’ relatively to each wheel and about which the
wheels.
,
_
"The face portions F and. F’ of the?nishing
wheels are then trued up by the wheel dressing
tools vso'that the face portions F of the three
-
The two" grinding tools 6! pass vertically
through the'outer éndportions of the-respective
wheels .lie in a single plane normal to the axis
‘ about which the gauge is movable and the face
farther than the thickness of the grinding wheels. 10 portions F’ of'the three wheels lie in a single
arm extensions With their working or active grind-'
. ing" ends opposed to each other and spaced'apart
plane normal'to said axis and parallel to the
plane in which the face portions F lie. This tru
ing up of" the wheel face portions is effected by
adjusting the sleeve .3% on post 31 for grinding
Any suitable means may be provided for holding
each tool ‘rigidly, and preferably adjustably, to
the associated arm extension. Theitools are pref
erably' of the type having a grinding diamond
fixed at their working ends.
15 action of’ one of thefwheel dressing tools on the
surface '1?‘ or F’ of the wheels. The hand Wheel
‘
The_'gauge gripping elements 62 andE'i-i pass
28 ‘is then turnedito index" that tool for coaction
through and are held respectively to thearm ex
with one of the'gauge ?nishing wheels, and is
tensions 54a and 55a, the element 63 being'rigidly
then’ oscillated to traverse said one of the tools
held‘ to the'extension ‘55a’, and the element E52 be
ing held to extension 562a for upward yielding [20 back and forth over the selected wheel face in "an .
are which causes the tool to wipe over the selected
against spring resistance. Each gauge gripping
element extends vertically through the associ ‘ , annular wheel face For F’ twice on each stroke
of oscillation of the tool, the extensible tool-sup
ated arm extension with the adjacent ends-of
porting arms being so adjusted that the arcuate
the two elements directly opposed for gripping
path of movement of the opposed tools will cross
"a-P'ga'uge therebetween. Preferably the adjacent -
ends of the gripping elements with the two work
the annular ‘face 1'" or F’ of any selected one of
the wheels twice between the axis of tool oscilla
tion and a circle concentric with said axis and
passing through the‘ axes of rotation of the
engaging anvil faces of the snap or like gauge 1
wheels. After dressing the corresponding face
opposed ends of the ‘elements are frusto-conical
and the gauge to be ?nished is formed with 00
noidal recesses to frictionally receive the conoidal
extending horizontally, ‘i. ve. transversely of the
of each of the three wheels, the sleeve is adjusted
axis-of oscillation'of the supported gauge. The
for dressing of the otherface of each Wheel by ‘
the other-wheel dressing tool, and said other
wheel ‘faces are then dressed or trued up seriaturn
gauge grippers are spaced farther apart than
the tools-6|. The gauge gripping element 63 is
held line'extension 55a',"as‘by being threaded and 1
being screwed through a vertical threaded 'bore
faces, thus conditioning the apparatus for ?n
in said extension. The gauge gripping element 62
is preferably a spring-pressed plunger which is
vertically slidable through extension Sea, is urged
downward'by a spring 64, and has a ?nger knob
65'at its upper end which limits spring-urged
is'ning of the anvil‘ faces of the gauge by the
wheels with great exactitude to planar form with
the opposed ?nished planar faces parallel to each
other. The tools also maybe used tore-dress the
fwh'eels, as required -fwhen'they become worn or
in the sameimanner asthe ?rst mentioned Wheel
‘movement of said element. To prevent possible
surface-clogged in use.
-
,
accidental swinging of a frictionally gripped
The gauge to be ?nished, is- mounted in the
conditioned apparatus by clamping the body por- '
gauge about the gripping elements as pivots, suit
able means, such as .the spring clip 66, may be 45 tion of the gauge v.6‘! between the two opposed
gauge grippers with the un?nished work-con
?xed to the sleeve 38 to engage the main body part
tacting anvil faces 81a and 51b of the gauge sub
of the gauge,’as shown, to prevent any such acci
, stantially parallel to the planes of the face por
tions F and F" of the three gauge ?nishing Wheels.
dental’ swinging of the gripped gauge during ?n
ishi-ng of its work-contacting or anvil faces. v '
Preferablyv the body-portion of the un?nished
Thearrangement by which the ?nishing wheels
arespaced radially equal distancesfrorn an axis
gauges‘! is provided with two opposed conical
vaboutwhichthe wheel dressing tools and the
“ sockets to receive‘ tightly the'frusto-conical ends
of‘the gripping elements‘ 62 and ‘63, and, to fur- ]
ther prevent possible turning of 1the 'gripped
oscillated relatively to eachfwheeLis highly'ad
vantageous for simplicityand compactness of the 55 gauge, the hook-shaped spring clipy'li? held to
gauge are indexed from wheel to :Wheel and are»
sleeve 3g is engaged with the body portion of the
‘gauge as shown. _The gauge shown is of "the
apparatus and for accuracy of work performed.
The wheels may be, andpreferably are, of large
type haVingtWo pairs'of opposed anvil faces 61a
radius, as shown, thus reducing the extent of
ande'lb, but may have only a single pair of anvil
'wearj'of the wheels‘ per gauge ?nished by the ‘
apparatus‘
'
60
'
The wheel
is formed of any suitable material‘
faces 61a and ’61b.'
‘
,
'
>
'
I After thus mounting the gauge in the appa
adapting it for rough grinding, wheel 24 is formed
ratus, the sleeve 38 is, adjusted for ?nishingof the
. vof‘anylsuitable‘materialadapting it for ?ne grind- I
' work-‘contactingor anvilface or faces 61a of the '
ing, and wheeli25 is formed of any suitab1e.ma-;
, gauge by the face F of the rough grinding wheel,
terial adapting it for lapping or polishing. "Many
such materials are well known.
finally ‘by face _F* of the ‘polishing, or flapping
then by'face F‘of ‘the, ?ne grinding wheel, and .
The mode of operation o'f?the ‘above, described
{wheel} The sleevey'is then’adjusted for ?nish.“
preferred ‘form of giauge?nishing ‘apparatus will
ingthe other ‘work-contacting or anvil face or
now be. described, and ‘this description also will, 7
facesv 51b of the gauge by the other faceF' of
‘in conjunction with, the foregoing description‘ of 70 each wheelbeginning with the rough grinding
‘the apparatus, make clear in detail the improved ' wheel and ending with the'polishingor lapping
wheel. The hand wheel’ 28 is turned to index the.
gauge from wheel to ‘wheel and is oscillated'to
‘ The mountings for‘ the ‘three ‘shafts fjcarrying
sweep the gauge anvil faces back and fort-h-frela- '
‘the ‘three gauge '?nishing'wheels are ?rst ‘adjusted 75 'tively to each wheel to ?nish the ‘gauge races-‘in.
method of ?nishing gauges in accordance with the
invention.
'
w
v
.
..
'
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1_
2,411,814
the manner above described in connection, with
the wheel dressing operation of the wheel dress
ing tools.
-'
,
"
a ?xed upstanding axis and for holding the wheel
against axial movement, said wheel having op
posite and parallel grinding side faces spaced
1. An apparatus for grinding ?rst one and then
apart a lesser distance than the work-contact
faces of the gauge to be ground, means for rotat
the other of two opposed work-contact faces of
ing said wheel, a conversely turnable support,
I claim:
means mounting the support on the frame for
rotation about a, ?xed upstanding axis which is
allelism, comprising a frame, a grinding wheel
parallel to that of the wheel and for holding
mounted in the frame for rotation about a ?xed
axis and held against axial movement, said wheel 10 said support against axial movement, a handle
a snap or like gauge to bring said faces into par
having at opposite sides thereof two parallel
?xed to the support for manual turning of the
grinding faces lying in planes normal to the wheel
support at will in each directionv about its axis,
a slide mounted on the support to turn there
with and for up and down adjustment. thereon
axis and spaced apart a lesser distance than
the work-contact faces of a gauge to be ground,
means for rotating the grinding wheel, a con 15 parallel to said wheel and support axes, said slide
having extending laterally therefrom two super
versely turnable support held to the frame against
Posed arms carrying superposed gauge gripping
axial movement and for turning of the support
devices adapted to grip therebetween a gauge to
about a ?xed axis which is parallel to the wheel
be ground, means to hold said slide adjusted on
axis, and means to hold a gauge to‘ the support
for movement of the gauge past said wheel with 20 the support at different levels in each of which
said gripping devices are movable past the wheel
its work-contact faces straddling the wheel be
with one device passing below and the other above
tween the wheel and support axes, said means
the wheel, said devices being adapted to grip a
being mounted on the support to turn therewith
and for adjustment of said means axially of the
gauge therebetween to pass the wheel and the
support for grinding of only one of said gauge 25 wheel mounting means with the Work-contact
faces of the gauge disposed at opposite faces of
faces at a time, and said support being converse
ly turnable to carry a gauge held by said means
the wheel, and means on said slide between said
entirely clear of the wheel in both directions of
arms to prevent turning of a gauge between said
turning of the support.
2. An apparatus for grinding ?rst one and then 30
the other of two opposed work-contact faces of
gripping devices.
,
4. A grinding apparatus, as claimed in claim 3,
wherein each of said arms carries-a dressing ele
ment for the grinding wheel, said elements being
superposed and spaced apart a distance greater
mounting means journaling said wheel for rota
than the spacing between the grinding faces of
tion about a ?xed axis and holding said wheel 35 the wheel with their opposed wheel dressing ends
disposed at levels intermediate the levels of the
against axial movement, said wheel having two
adjacent ends of said gauge gripping devices.
parallel annular side grinding surfaces disposed
5. An apparatus for grinding ?rst one and then
in planes normal to the wheel axis and spaced
a snap or like gauge to bring said faces into par
allelism, comprising a grinding wheel, wheel
the other of two opposed work-contact faces of
apart a lesser distance than the work-contact
faces of a gauge to be ground, means for rotat 40 a snap or like gauge to produce on the gauge two
ing said wheel, a rotative support extending past
the periphery of the wheel, mounting means en
gaged with said support at opposite sides of the
' plane of the wheel to hold said support against
parallel and planar work-contact faces, com
prising a frame, a grinding ‘wheel mounted on the
frame for rotation about a ?xed upstanding axis
and having upwardly facing and downwardly fac
axial movement and to journal said support for 45 ing parallel and planar grinding side surfaces
spaced apart a lesser distance than the work
free rotation relatively to said wheel about a
contact faces of a gauge to be ground, means for
?xed axis which is parallel to the wheel axis,
rotating the grinding wheel, an upstanding and
a slide held to said support to turn therewith and
conversely turnable support held to the frame
also for adjustment relatively thereto in a ?xed
above and below the plane of said wheel against
path normal to the planes of the grinding sur
axial movement and for turning of the support
faces of the wheel and parallel to the axes of ro
about a ?xed axis parallel to ‘that of the wheel,
tation of the wheel and support, means carried
a gauge-holding device adjustable up and down
by said slide for ?xedly holding a gauge to the
on said support and mounted on the support to
slide to turn with said support and pass the
wheel with opposed work-contact faces of the 55 turn therewith for carrying a held gauge past the
wheel with the work-contact faces of the gauge
gauge positioned to pass at opposite faces of the
arranged to pass the wheel between the axis
wheel in a path extending between the slide and
and perimter of the wheel, and means carried by
the wheel mounting means, means to releasably
said support and connected with said gauge-hold
hold the slide at will in selectively adjusted posi
ing device for effecting both coarse and mi
tions on the support in each of which a different
crometric up and down adjustments of said de
grinding surface of the wheel is effective on a '
vice relatively to said support.
f
different work-contact face of a held gauge as
6. A grinding apparatus, as claimed in claim
- the gauge is carried past the wheel, and a handle
‘5, wherein the means for adjusting the gauge
?xed to said support for at will manually oscil
lating the support about its axis to traverse 9, 65 holding device up and down on the support com
prises a rack ?xedly held to and extending longi
held gauge back and forth past thewheel for
tudinally of the support, a pinion meshing with
grinding and for at will manually turning the
said rack and journaled on the gauge-holding
support to a position in which the gauge holding
device, a handle ?xedly connected with the pin
means and a gauge held thereby are clear of the
ion
for turning said pinion to effect coarse adjust
wheel.
.
7.0 ments
of the gauge-holding device, means slid
3. An apparatus for grinding ?rst one and then
able up and down on the support and releasably
the other of two opposed work-contact faces of
lockable thereto, and a micrometrically adjust
a gauge to bring said faces into parallelism, com
able connection between the. last-mentioned
prising a frame, a grinding wheel, means mount
ing said wheel on the frame for rotation about 75 means andsaid gauge-holding device for effect
> 2,411,81é
9
10
V
relatively to said means and support while said.
with the opposed work-contact faces of the held
gauge spaced longitudinally of said axis and the
means is locked to the support.
'7. A grinding apparatus, as claimed in claim
~ set of grinding wheels having different grinding
ing ?ne up and down adjustments of said device
5, wherein the support ‘comprises an upstanding
crank shaft journaledat its upper and lower ends
open side of the gauge farthest from said axis, a
gauge-holding. device has a sleeve portion em
characteristics and spaced around said ?xed axis
with the wheels lying in a common plane normal
to said axis, each wheel having two oppositely
directed grinding side faces disposed in parallel
planes normal to the wheel axis and spaced apart
bracing and slidably adjustable up and down on
the wrist‘ of said crank shaft, and wherein a han
dle is ?xed to said crank shaft adjacent one end
of the shaft for manual turning and oscillation
longitudinally of the wheel axis a distance less
than the work-contact faces ofa gauge to be
ground, means mounting said wheels in the frame
for rotation about ?xed axes parallel to the "axis
in the frame and having an elongate wrist ex
tending past the wheel periphery, wherein the
>
of the gauge carrying means with the peripheries
8. An apparatus for grinding ?rst one and the
of the wheels spaced from the axis of the gauge
carrying means for successive straddling of the
of said shaft at will.
the other of two opposed work-contact faces of a
snap or like gauge to provide parallel and planar
work-contacting gauge faces, comprising a frame,'
three grinding wheels mounted in the frame
against axial movement and for rotation about
parallel ?xed axes with the wheels lying in a com
mon plane and spaced around and radially equi
distant from a common center, each wheel having
two oppositely directed grinding side surfaces
disposed in parallel planes normal to the wheel =
axes and spaced apart a lesser distance than the
work-contact faces of a gauge to be ground, said
wheels respectively being coarse grinding, ?ne,
grinding and lapping wheels, means for rotating
the wheels, and gauge indexing and oscillating ‘
means mounted in said frame for manual turn
ing movements thereof at will about said common
center to index a held gauge from wheel to wheel
and to oscillate the gauge at each wheel with the
wheels by a carried gauge as the gauge is indexed
from wheel to wheel, and means for rotatively
driving said wheels, said gauge carrying means
including means for selectively adjusting a car
ried gauge relatively to and in a path normal to
the plane of the grinding wheels,
11. A grinding apparatus for acting upon ?rst
one and then the other of two opposed work-con
tact faces of a snap gauge to bring said gauge
faces to parallel and planar condition, compris
ing a frame, a grinding wheel, means mounting
the wheel in the frame against axial movement
and for rotation ‘of the wheel about a fixed axis,
means for rotatively driving the wheel, said wheel
having two oppositely facing annular grinding
side surfaces spaced apart a lesser distance than
V the work-contact faces of a gauge to be ground
and disposed in parallel planes normal to the
Wheel axis with the inner and outer edges of
said surfaces clear of the wheel mounting means,
wheels edgewise one at- a time between the work-.;
a snap gaugeholder mounted in the frame for
contact faces of the gauge, said gauge indexing
manual oscillation at will about a ?xed axis par
and oscillating means including provisions for
allel to the‘ wheel axis to carry the Work-contact
adjusting a held gauge relatively to said wheels
in a path normal to the planes of the grinding 40 faces of a held gauge twice entirely across the
grinding surfaces of the wheel at each stroke of
surfaces of the wheels and parallel to the wheel
oscillation of the holder, said holder being mount~
axes.
~
ed in the frame for selective adjustment thereof
9. A grinding apparatus, as claimed in clai
in a path normal to the planes of the grinding
8, wherein the gauge indexing and oscillating
surfaces of the wheel for grinding of one con
means comprises a support held to the frame
tact face of the gauge at a time and for action
against axial movement and journaled in the
gauge held to said means for protrusion of the ‘
frame at opposite sides of the plane of the grind
ing wheels for oscillation and rotation of said sup
port about said common center, a gauge-holding
device mounted on said support to rotate and os
cillate therewith and for adjustment of said
device axially of said support, and means car
' ried by the support and connected with said de
vice for selectively adjusting said device longi
tudinally of the axis of the support in a path
normal to the plane of said wheels.
10. An apparatus for grinding in succession
two opposed work-contact faces of a snap or
like gauge, comprising a frame, gauge carrying
means mounted in the frame for rotation and os
cillation of said means at will about a ?xed axis
of each said wheel surface on a different gauge
face, and means for so adjusting said holder.
12. A grinding apparatus, as claimed in claim
11, wherein three wheels of the speci?ed form
and mounting are provided with said wheels
spaced around and equidistant from the axis of
oscillation of the gauge holder and all lying in a
common plane, one of said wheels having coarse
grinding surfaces, another having ?ner grinding
surfaces, and the third having lapping surfaces,
wherein means are provided for rotating said
wheels, and wherein the gauge holder is manual
ly turnable'at will about its axis of oscillation
to index a held gauge from wheel to wheel and
also to oscillate a held gauge at each wheel.
to index to different grinding stations‘ and to os
cillate at each grinding station a carried gauge
i
LINO SCUSA.
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