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Sept. 24, 1946.
4 Sheets-Sheet 1
Filed 001;. 27, 1944
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‘Sept. 24, 1946.
Filed Oct. 27, 1944'
M fawnzqa EARLY
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4 Sheets~$heet 2v
Sépt. 24, 1946.
Filed Oct. 27,1944
4v>S‘heets-Sheet 3
Sept. 24, 19,46.
Fil’ed Oct. 27, 1944
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4 Sheets-Sheet 4
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Patented Sept. 24, I946
M. Edward Early, Rockford, Ill. ,
Application October 27, 1944; Serial No. 560,657
rll?laims. (Cl. 51—133) ‘,
The present invention relates to a machine
adapted for lapping or honing articles in quan
a gear rack II, a pinion l2 and a hand wheel l3,
thus to provide conventional means for moving
member D to and from the tool.
Member 0 is provided with an electric motor
providing a machine which is simple, easily oper
ated, accurate, can be manufactured at low cost 5 (not shown), having a driven shaft III to which
member D is operatively connected. Member C
and has high productivity.
tities andhas for its objects generally ‘stated,
has a suitable bearing I5 throughwhich shaft 14
The principal objects of the present inventio
are to provide a rotating head ‘with a number of
collets for holding the work, each collet being
rotated and oscillated radially, and to provide a
motor having abrasion discs secured to theends
of the motor shaft.
I have shown member C as slidably mounted
on member In for moving the work to and from
the discs on member B. It will be understood
that any other suitable means may be supplied
for moving member D, for example, the motor
and member C maybe held stationary and the
possibility of inaccuracy or defect as to the 15 shaft of member D may be spline connected to
the motor shaft or the motor maybe slidably
?nished surface.
An important object of the present invention is
to so hold and move the work whereby there is no
To these and other useful ends my. invention
consists of parts, combinations of parts or their
equivalents and mode of operation ashereinafter .
described and claimed and shown in the accom
panying drawings in which:
Fig. 1 is an elevational view of the preferred
form of my invention.
Fig. 2 is a top view of the disc carrying unit B.
Fig. 3 is a longitudinal sectional view of. the
work head.
Fig. 4 is a front view of the work head.
Fig. 5 is a sectional view of the work headtaken
mounted on member C or on member NJ, the de
sign of the mechanism for moving member D to
and from the discs being optional.
Member B is rotatably mounted on member A,
the mounting comprising a post l8 having a flange
I9 and having rotatably mounted on the post a
sleeveZ? with a ?ange 2|. A motor base 23 is turn
ablymounted on ?ange [9. The assembly being
held together by means of bolts 24, so either mem~
bers 20 or 23 may be turned on post l8, bolts 24
being preferably positioned sov members 20 or 23
may be turned 1/4 or 1A; turn in either direction.
I provide a ‘ring 29 which is _held to member
Fig. 6 is a top view illustrating the mounting 30 29 preferably by means of four spaced braces
39. I rotatably mount in ring 29 preferably four
of the collet controlling lever.
Fig. 7 is a front view of the device as shown in
shafts 3i having discs 32 mounted on their outer
Figure 6.
ends, each being arranged to carry a sheet of
Fig. 8 is a horizontal View of the device shown
abrasive material or be supplied with an abrasive
in Figures 6 and '7.
compound. The ends of the motor shaft are
on line 5-5 of Figure 3.
Fig. 9 is a view similar to Figure 7 with the lever ‘
Fig. 10 is a side view of the device as shown
splined and the inner ends of shafts 3|v also are
I provide a splined collar 33 so these
shafts maybe operatively connected by moving
in Figure 9.
this member over the spline of a‘ shaft 3! and
Fig. 11 illustrates fractionally a modi?cation 4-0 disconnect the shaft 3| bymoving member '33
of member D.
out of contact with’the spline of this shaft.
As thus illustrated the base of the machine is
In some installations, ring 29 and braces 30,
designatedby reference character A, the disc
including two of the discs and shafts may be dis
carrying member is designated in its entirety by
pensed with and two discs 32 mounted directly on
reference character B, the work carrying carriage '45 the ends of the motor shaft and that by turning
is designated in its entirety by reference char- '
the motor 1/2 turn either disc may be made to
acter C and the work head’ is designated in its
contact the work. In either event locking means
entirety by reference character D.
(not shown) is provided whereby members 2| and
23 may be closely adjusted to a desired position
Member A may be a frame somewhat similar
to a lathe frame. and having preferably four carry 50 and positively held, the desired position being
ing legs (not shown). Member A is provided with '
_ one in which the face of discs 32 will be held
an extension member [0 which is rigidly attached
exactly transverse to the shaft which carries
member D. For adjusting the work to exactly a
thereto. Member C is slidably mounted on mem
ber Ill having means for manuallymoving this
vertical position ‘to discs 32, shims (not shown)
member. In Figure 1 I illustrate this .means by 55 may be used between members Ill and C. , ,
Referring speci?cally to member D, an eccen
tric sleeve 40 is rotatably mounted on shaft 14
having gear teeth 4! and a bearing surface 42, and
is held from turning in any suitable manner. For
example shafts 48 are secured to member 49 and
slidably extend into member C for this purpose.
A ring 43 is rotatably mounted on surface 42 and
member 43 has rotatably mounted thereon shafts
viding four different operations may be used.
Generally two only are necessary.
It will be seen that eight different pieces of work
may be lapped, polished or rough surfaced at one
time and that the operator may without chang—
ing the work perform two or more operations on
the work; and that because of the oscillating and
44 by means of ball bearings 45. I provide pinion
sitely turning head and disc, the work will be
turning movement of the work and the oppo
teeth 46 on the ‘inner ends of shafts 44 which 1O quickly and efficiently trued, polished or bur~
nished, depending upon the requirements. It will
mesh teeth 4 I. Thus it will be seen that if member
also be seen that if there is a slight difference
45 is held from turning and member 43 is rotated, '- '
in the length of the work, by manipulating lever
pinions 46 will travel around the axis of teeth 4!
‘i2 and member C, the faces of the work may be
as they rotate,
On the forward end of shafts 44 I mount sleeves 15 evenly positioned by contact with the disc.
Referring now to Figure 11; this design oper
59. These sleeves are offset as at 5!, the rear end
ates exactly the same in principle as the design
being slidably and rotatably mounted on shaft
shown in Figure 3, the advantage over the other
44. Offset 5! is, as shown, a distance from the
design being that it is simpler and more compact
front end of shaft 44. In the spaces between
offsets 5| and the ends of the shafts I place springs 20 and better adapted for work requiring extreme
accuracy. An eccentric sleeve 85 is rotatably
48. Members 52 and 53 are keyed to shaft l4.
mounted on the driven shaft 8! and having gear
each being provided with slots 54 and 55. Slots
teeth 32 on its rear end and a bearing surface 83
54 are slightly larger than the diameter of the
on its forward end. This sleeve is prevented from
rear of members 56 and slots 55 are slightly larger
than the diameter of the front end of members 25 turning by means of shafts 43 as in the other
design. A ring 84 which corresponds to ring 43
513. Thus it will be seen that offset 5| will rest
in the other design, is rotatably mounted on hear
against the rear surface of member 53 and shaft
ing surface 83. A collar 85 is secured to shaft 5!
44 will therefore be urged rearwardly, thus to
having a driver 19. Apin 85 is secured to ring
cause collets 65 to engage the work as follows:
84 which extends in the path of member '59, thus
Collets or work holding element 60 are screw
member ‘is will drive ring 84.
threaded into shafts 44 and when the work is
I provide a number of collet equipped shafts 8?
placed in the collets which are supplied with out
having gear teeth 88 which mesh teeth 82. Mem
wardly extending ?anges 5|, springs 49 will urge
bers 81 are rotatably mounted in ring 84 by
members 6! into the sleeves, thus to cause the
means of ball bearings 33. A collet shaft 553 is
collets to grip the work. Shafts 44 are held in
slidably mounted in members B‘! as at 55 and 52
longitudinal working position by offsets 5i and
so as to form an opening for a spring 93. The
members 5 !. It will be understood that the design
forward ends of members 8‘! and 90 are shaped
shown in‘Figure 3 is for purposes of illustration
as shown, members 9i! having outwardly extend~~
only and that ball bearings 45 will be larger than
shown and that all of the parts in member D may 40 ing cone shaped ?anges 94. The entire front end
of members 96 are split, preferably in four places
be differently designed.
as at 95 so as to grip the work because of the ten
As illustrated ring 43 will be turned by mem
sion of spring 93. The rear ends of members
bers 52 and 53; however ring 52 may have a pin
99 are provided with projections ‘H so member
which extends into member 43 to act as a driver.
In this event slots 54 and 55 need not touch the 45
90 suitable
as in Figure
be the
or a stem
sides of ‘the sleeves.
I provide means for disengaging collets 60 en
masse as follows:
on the work.
An annular disc 18 is slidably mounted on shafts
48 and is normally held adjacent projections ‘H on
44- when the collets are engaged. I provide
a lever '52 having a shape as shown in Figure '7.
This lever at its forward end is pivoted to a shaft
48 as at l3 and the lever is also pivoted to disc
‘54 as at ‘34 and '55.‘ Thus it will be seen that by
pressing forward on the free end of lever 12 mem
Having thus shown and described my inven'
tion, I claim:
1. A lapping machine of the character de
scribed, comprising a motor driven disc adapted
ber "iii may be moved forward and contact mem
ber ‘I! so as to disengage the collets, thus releas
for use on its face of a lapping compound or an
driven shaft
and aawork
head element
means for manually moving the disc
head toward and from each other, said work head
comprising an eccentric gear and bearing mem
ber, and being rotatably mounted. on said shaft
ing the work, so the work can be removed and
new pieces inserted in the collets.
60 and held from turning by said carrying element,
a ring rotatably mounted on said bearing mem~
After the work is inserted in the collets and
ber, a number of spaced shafts rotatably mounted
before lever 12 is released, member C may be
on said ring having pinions secured thereon for
moved forward so plate 32 will hold the work in
engagement with the teeth of said gear, hubs
position until lever 12 is released.
It will be seen that when the collets are loaded 65 secured to the front end of said driven shaft hav
ing radially positioned slots one for each said
with work and plate 32 supplied with an abrasive
shafts, work holding collets secured. to each said
material and the motors started, the work will be
shafts, an offset sleeve slidably mounted on the
revolved and turned around in circles and moved
forward end of said shafts, the forward
back and forth across the face of plate 32. The
the sleeve being slidably mounted on the collets,
?rst such operation may be made with plate 32
a cone shaped projection on the forward end of
having a fast cutting abrasive material. After
said collets, springs positioned between the offset
the work is brought into contact for this ?rst
of the collets and the ‘front end of said shafts
operation member B may be turned to another
adapted to yieldingly hold said cone shaped sur
disc on which is applied a ?ner abrasive material.
With the design shown, four different discs pro
75 faces against the forward end of said sleeve. said
~ collets having openings for the reception of the
work and means whereby said springs will cause
the collets normally to grip the work, manually
operated means at the rear of said work head.
adapted to contact said shafts and cause the col
driven shaft operatively connected to said ring,
releasable means associated with said work hold
ing means, means adapted to hold said gear and
bearing elements from turning, whereby the work
will be revolved and , also turned. around said
prising a head havingla protruding driven shaft,'f
driving shaft and oscillated radially.
4. A device of the character described com
prising; a driver shaft, a hub rotatably mounted
on said driver shaft, the forward end of the driver
on said bearing member, a number of spaced col
a number of circumferentially spaced collet mem
lets to release the work simultaneously. ‘
2. A device of the character described, com—. .
an eccentric gear and ‘bearing member rotatably
shaft protruding, said hub having a gear on its
mounted on said shaft, a ring rotatably mounted 10 rear end, a ring rotatably mounted on said hub,
let equipped shafts rotatably mounted on said
bers rotatably mounted in said ring having at
ring having pinions adaptedthe
to end
of said
said gear,
their rear ends pinions adapted to mesh said
driving member ‘secured to
gear, means for holding said hub from turning, a
shaft having radially positioned slots through
driver secured to the protruding end of said driver
which the collets extend, means for holding said:
shaft having means for turning said ring to
gear and bearing member whereby when said
thereby cause the collet members to turn around '
driving and ring member is turned, the collets will
said driver shaft and revolve as they turn, collet
revolve and be turned around said driven shaft
shafts slidably mounted in said collet members
and also caused to oscillate radially.
“1 20 having springs’ and means whereby the collet
3. A device of the character described, com?
shafts will be moved rearwardly by the springs to
prising a head having a protruding driven shaft, .
an eccentric gear and bearing member rotatably '
cause the collets to engage the work, a longi
tudinally movable plate in rear of said collet shafts
mounted on said shaft, a ring rotatably mounted
having manually operated means to cause the
on said bearing member, a number of spaced 25 plate to engage the collet shafts simultaneously
work holder equipped shafts rotatably mounted on
to move them forward for disengaging the work.
said ring having pinions adapted to mesh said
gear, a driving member secured to the end of said
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