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Патент USA US2404844

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‘FY 3% Mme
29
W. JACKSON
MACHINE AND METHOD FOR EDGING ARTICLE-S
Filed May 10, 1945
31F?“
2 Sheets-sheet l
f‘” 3”’
J
INVENTQR
ATTORNEY
2,404,844
Patented July 30, 1946
UNITED ,STATES PATENT‘ OFFICE‘ V
MACHINE AND METHOD'FOR Enema
ARTICLES
George W. Jackson, Southbridge, Mass., assignor
to American Optical Company, Southbridge,
Mass, a voluntary association of Massachusetts
_
Application May 10, 1943, Serial No. 486,468
11 Claims. (Cl. 51-442)
1
Fig-2 is a fragmentary sectional View taken
This invention relates to devices for reducing ‘
as on line 2-2 of Fig.1 and ~looking‘in the di
articles to desired contour shape and size and
relates more particularly to lens edging ma
rection‘indicated by the arrows; and
.
the
[out of mesh with the main‘drive gear.
i
‘
i ‘
The idea of providing a pluralitylof work sup
porting heads to function cooperatively with uni
' is to provide a device for, reducing articles to'
controlled and relates particularly to the provi
- ‘
5 retaining the intermediate ‘drive connection gear
same. “
One of the principal objects of the invention
desired .contour shape and size whereby the re
sultant size and shape may be more positively
‘
‘Fig. 3 is a fragmentary VleW of the means ‘for
chines and novel means and methods of making
tary abrading means is not new in the art. In
10 the past, however, it was the usual practice to
sion of novel means and method of obtaining
said result in a relatively simple efficient and
economical manner.
Another object is to provide a machine of the
above character whereby a plurality of articles,
such as lenses, may be edged to desired size and
shape separately and independently of each
employ abrasive means in‘ theform of a‘ disc
shaped member or wheel supported for rotation
about a central spindle. A plurality of work
supporting heads were positioned at different lo
cations‘ throughout the periphery of the‘disc or
wheel. Abrading wheels or discs of this nature,
in the past, were, in most instances, iormedof
an abrasive composition which required. constant
‘other and with the use of the same abrading
dressing and truing of the‘peripheral surface of
means for removing the material of the article
20 the wheel. They were also of such a nature that
or lens from the contour thereof.
during the edging of an article, such'as a lens,
Another object is to provide a unitary device
a certain amount of the'material of the face of
of the above character with a plurality of oper
the wheel ‘would wear away. This introduced
ating heads for supporting an article or lens to
great difficulty in reducing the articles to a‘ de
be edged ‘to desired contour shape and size
whereby the function of said operating heads ' sired controlled size and shape and also required
may be separately and independently controlled.
the provision of relatively complicated adjustable
means, throughout the length and width thereof,
abradmg wheel of the prior art type was lim
means for compensating for'tne‘wear. Abrasive
Another object is to provide a device of the
means of the above character were relatively ex
above character so constructed that the abrad
pensive and most known prior art devices em
ing means may be quickly, easily and relatively
30 ploying such abrasive means were so constructed
inexpensively replaced when worn.
that it was extremely difficult to replace the said
Another object is to provide a device of the
abrading Wheel or disc when worn, Another
above nature with belt-like abrading means in
difficulty was that the amount of. work sup
combination with means for supporting the work
porting heads which could be used with any one
whereby different portions of said belt-like
ited and, in most instances, only a relatively
small section of the upper circumferential edge
of the abrading wheel could be used. As iaras
may be utilized simultaneously or separately
during the operation of the device.
Other objects and advantages of the inven
tion will become apparent from the following
description taken in connection with the ac
is known no more than one half of the circum
40 ferential edge of the abrading wheel was used.
It, therefore, is one of the primary objects of
the present invention to provide contour form
companying drawings. It is apparent that vari
ous changes may be made in vthe details of con
struction, arrangement of parts and methods
shown and described without departing from
the spirit of the invention as expressed in the
accompanying claims.
I, therefore, do not wish, to be limited to the
exact details of construction,’arrangement of
parts and steps of the methods shown and de
scribed as the preferred forms only have been
given by way of illustration.
Referring to the drawings:
‘ Fig. l is a side elevational view of the device
embodying the invention shown partially in cross
Section;
45
ing or lens edging means which is such thatany
desirable number of abrading heads may be em
ployed, with unitary abrading. means and be in
dependently controlled and operated whereby the .
resultant edged article or lens will be .more posi
tively and accurately controlled as to size and
‘shape, which ‘will obviate the use oi". truing or
0 honing devices and greatly reduce the cost" and
‘increase the e?lciency ‘and production of‘ such
edged articles or lenses.
‘
. ‘
Referring more particularly to the drawings
wherein‘ like characters of reference designate
55 like parts throughout the several views the device
2404,5344
3
.
4
embodying the invention comprises a base plate
3 supported by suitable legs 4. On the base plate
.
supported by a bracket arm 5! extending from
the upright 5. The gear 44 meshes with an idler
gear 52 which, in turn, meshes with a drive gear
3 there is provided a plurality of upright supports
5. Protruding from said upright supports is an
53. The idler gear 52 is carried by an arm 54
arm 6 to which a suitable roller 7 is pivotally at UK pivotally attached to the depending bracket 49
tached as indicated-at 8. A pair of such arms 6
and isladapted to permit the gear 52 to be swung
are supported adjacent the opposed ends of the
base plate 3 and are adapted to carry an end
less belt-like member 9 having a coating of abraa
sive means on the outer surface thereof. The
,
I19
belt-like member 9 passes over a» pair of rollers
H] adjacent the Opposed ends of the base plate
and located below the base plate, as illustrated in
Fig. 1. The rollers H) are pivotally supported by
brackets I l pivotally attached‘at l2 to the base
of the machine and held under tension against‘
the belt-like member}! by spring means 1-3. The.
spring means l3‘and pivoted brackets “to which
the rollers I3 are attached, are for the purpose of
maintaining the. belt~like member '9 taut. . :The 20
base plat'e3 vis ‘provided with 'amplurality of
transverse slideways if] having a slide plateul5
slidablymounted thereone. The saidv slideways
extend substantially perpendicular to the direc
slide plates .l5'are provided with a plurality of
uprights [6 each having upper bearing means If!
in which depending stems I8, carried by a pres
sure plate 19, extend. The plate 19 is provided, .
adjacent the opposed ends thereof, ‘with spaced ,
supports 23 and 2| to which suitable rollers 22
and 23 are pivotally attached. The rollers 22 and
23‘ extend transversely of the outer surface of the
belt-like member 3, and thewplatejlike member
belt-like member. The plate?lS, substantially
ed adjacent one end thereof with the pivoted arm
54 and adjacent its opposed end with a protrusion
been the- support 51 for the gear 53, is adapted
to’=constantly urge the gear member 52 into
meshed. relation with the respective gears 44 and
53.
'
.
‘
-
~
As shown in Fig. 3, the arm 54 is provided with
a latch tongue 58 adapted to be engaged by a
suitable'latch member 59 carried by the depend
ing'bracket 49 by means of which the gear 52
may be held out of engagement with the drive
gear 53. This facilitates the stopping or starting
of the respective‘work supporting means asJde
sired.
tion of movementrof the abrading'belt 9. The '
l3 engages the intermediate undersurface of the
upwardlyfout of meshed relation with the gear
53. A suitable coil spring or the like 55,' connect
’
-
i
,
The reduced depending portions 27 von the, po
sition control shafts 24 ‘are provided ‘adjacent the
lower extremities thereof with sidewise deflected
portions 63 having a thread-ed bore. A screw
member 3! having a hand engagement portion 62
adjacent one end thereof and a contact shoe 63
adjacent the opposed end is adjustably supported
in said member 63. The hand contact member 62
is provided with a graduated scale 64 adapted to
register with a suitable indicator 65 for deter
mining the position of adjustment of‘the contact
shoe 63. The contact shoe B3 is adapted to en
35 gage a former 36 carried bythe‘shaft 4t and is
adapted to control the resultant shape and size
to which the article or lens 35 is to be formed.
The shape is controlled by the‘ shape of the
former St and the size is controlled by thead~
centrally thereofZ isprovided with a position con
trol shaft 24 slidablyvsupported in a bearing 25
attached to the uprights [B by thetie members
26. _The position control shaft is provided with
justment of the contact shoe 63.» The shaft 46
a reduced, depending portion ‘21 [which extends
through ‘i an opening '28 ina closed end of the
also supports a barrel cam 61 having a cam groove
68 therein in which a suitable pin-6S carried by
tween the closed end thereof andthe base of the
the upright 73 is positioned. The function of
the barrel cam 61 is to cause the Slide plate £5
bearing‘ 25. Internallyof the bearing and be
position‘control shaft there is provided a coil
spring 29 normally “urging the position control
to be oscillated longitudinally of theslideways l4
shaft is an upward direction and, in turn, urging
the pressure“ plate I19“ in an upward direction.
/ groove 63 is so angled as to control the extent of
oscillation and is preferably controlled so as to
The extent of upward-movement of said‘ pressure
plate is limited by theenlarged heads 33 ‘formed
dur'ing'the rotation of said barrel cam.
The
cause the oscillation to be substantially equal‘ to
50
the distance between the pieces of work held by
on the depending stems i8}. The uprights 5 are
provided, adjacent the upper ends thereof,_with
bearing means 3! and 32 respectively for rotat
the respective assemblies. This distance is in.
dicated at ‘H in Fig.2. The abrasive belt 9r'is
ably supporting clamp shafts 33 and 34. The
clamp shaft 33 is adapted to remain stationary
is'connected directly with the rotor of the ‘motor
and has a bearing pad 35 thereon for engaging
the work 36. The clamp ‘shaft 34 is also provided
driven through belt and pulley connections 12‘, ‘53 > V
and 14, with a driving motor ‘15. The pulley l4
so as to obtain the relatively high speed of rota
tion desired of the abrasive belt 9. The motor is
with a clamp pad 31 for engaging the opposed
provided with a reduction gear drive 16 which is
side of the work 36 and is adapted to be rotated
connected by means of the belt Ti to a suitable
and moved longitudinally to permit thespacing 60 pulley 13 carried by the shaft 19 whichVsup-ports
of the respective pads 35 and 31 for the ‘insertion
the main drive gear 53. The above device may
and removal of the work or lens 36. i_ The shaft
comprise a plurality of units A, B, C, D and E,
34 is provided with a collar 38 internally ofa hol
etc. with each of said units being substantially
low bore 31 formed in the bearing 3Z__and is nor-v
identical in construction and each supperting
the respective pieces of work 355, as diagram
mally urged in a direction outwardly of saidbear
ing ‘by a coil spring or the like 40. A hand wheel
4| is provided on the end of the shaft34 for ma
matically illustrated in Fig. 2, with the ‘formers
nipulating the same. The shafts 33 and 34 ‘re
article is to be formed.
spectively ‘are provided with drive gears 42 and
43 which mesh With'an intermediate gear 44: ‘The
gear 44 is, in turn, in meshed relation with the
gear 45 carried by a shaft 46. The shaft 43 is
V rotatably supported in spaced bearings’?! and
48. The gear 44 is supported by a bracket '49 de
pending ‘from a‘ ‘bearing 50. [The bearing 50"is
66 being of the resultant shape to which. the
7
The abrasive belt 9 is adapted to descend into
a cleansing trough 83 con-taining'a' suitable cleans}
ing ?uid 8i and also having supported therein a
plurality of brush like members '32 for engaging
and cleansing the surface of the abrasive belt-,3.
The ‘gear ‘43 meshes with a train of gears 83
75 simulating the gears 44, 52 and 53 with the gear
2,404, 844
6
5
for supporting an article to be edge abraded for
simulating the gear 53 being mounted on the
shaft 19 and being driven by said gear 53. This
is to cause the clamp shafts 33 and 34 to rotate
at the same speed and in the same direction.
The operation of the ‘device is substantially
rotation about a. substantially ?xed center in
continuous engagement with said endless belt
type abrasive means, means for moving said abra
sive means in a direction opposite to the direc
tion of rotation of the article and means embody
as follows:
'
ing a former and contact shoe having a portion
The work or lens 36, which is to be reduced to
with a relatively flat surface engaging the endless
the desired contour shape and size, is ?rst clamped
belt
type abrasive means and movable with the
between the clamp pads 35 and 31'. In the case
of a lens the axial position of said lens is con 10 contact shoe for altering the horizontal plane of
the portion of the abrasive means engaging the
trolled with respect to the pads and may be
article during the rotation of said article and for
accomplished in a manner generally similar to
causing said portion to remain substantially ?at.
any’ prior art lens edging machine. The proper
'2. The method of reducing a plurality ofarti
former 66 is placed on the shaft 46, The contact
shoe as is then adjusted to control ‘the resultant 15 cles' to desired contour shape and size comprising
independently supporting said articles to rotate
size to which the work or lens 36 is to be formed.
about relatively ?xed centers with‘ the edges
"When the lens 36 is initially placed between the
thereof in engagement with a substantially end
bearing pads 35 and 31 and is of a larger diam
less belt-t'ype abrading member with said articles
eter than that to which it is to be reduced the
being disposed in spaced relation with each other
said lens will exert a pressure on the immediate 20
portion of the-belt 9 with which the lens 36
engages, causing the plate l9 to‘be displaced
longitudinally of said abrading member and in
staggered relation with each other in the direcm
tion of- the ‘width of said abrading member and
simultaneously varying the plane of movement of
against the action‘ of the resilient means 29 to
initially hold the former contact shoe 63 out of
each section of said endless belt type abrading
engagement with the former 66. The gear 52 is 25
member engaging the respective articles inde
then moved into meshed relation with the drive
pendently and by controlled amounts toward and
gear 53; It being assumed, of course, that the
away from the center of rotation of the articles
motor 15 has been energized to cause the belt 9
during the rotation of said respective articles.
to be rotated and the gear 53 to be rotated. This
3.‘ The method of reducing a plurality of arti
causes the lens and former to be rotated at
cles to desired contour shape and size comprising
similar speeds through the rotation of the gear
independently supporting said articles to rotate
44 and will cause the lens 36 to rotate in a direc
about relatively ?xed centers with the edges
tion opposite to the movement of the belt 9 where
thereof in engagement with a substantially end
upon the pressure plate l9 being urged upwardly
less belt type abrading member with said articles
by the spring means 29 will cause the material 35 being disposed in spaced relation with each other
‘of the contour of the lens to be removed. Re
longitudinally of said abrading member, simul
moval is continuous until the former 66 engages
taneously varying the plane of movement of each
the contact shoe 63 whereupon the pressure plate
section of said endless belt type abrading member
l3 will be raised and lowered under the control
engaging the respective articles independently
40
of the former 6t‘: and will carry ‘that particular
and by controlled amounts toward and away from
section of the abrasive belt upwardly and down
the center of rotation of the articles during the
wardly controlled amounts according to the shape
rotation of said respective articles and simultane
of the former {it with the result that the lens 3'6
ously moving said endless belt type abrading
will be reduced to the contour shape of the former n
‘and to the size desired as controlled by the =
initial set position of the contact shoe 63.
Simultaneous ‘to this function the barrel cam
61 engaging with the stationary pin 69 carried
by the upright ‘ill will cause the slide [5 to os
cillate' in a direction transversely of the direc
tion of rotation of the lens 36 thereby causing dif
ferent surface area portions of the belt 9 to be
brought to bear against the edge of the lens 36.
It is to be understood that the lenses 36 supported
by the respective units A, B, C, etc., as shown dia- ~
grammaticallyin ‘Fig. 2, are staggered in the di
rection of the width of the abrasive belt 9 so as
to use different surface area portions of said belt.
All of the units A and B oscillate in synchronism
means as a unit in a direction substantially
transversely of the direction of movement of the
respective articles.
.
4. The method of reducing a plurality of arti
cles to desired contour shape and size comprising
independently supporting said articles to rotate
about relatively ?xed centers with the edges
thereof in engagement with a substantially end
less belt-type abrading member with said articles
being disposed in spaced relation with each other
longitudinally of said abrading member and in
staggered relation with each‘ other in the direc
tion of the width of said abrading member, simul
taneously varying the plane ‘of movement of each
section of said endless belt type abrading mem
ber engaging the respective articles independently
so as to cause the abrasive belt to shift through 60 and by controlled amounts toward and away from
out its length with respect to the rotating lenses.
the center of rotation of the articles during the
The gear 45 is formed to such length as to permit
rotation of said respective articles and simul
different oscillating movement and the rollers 1
taneously moving said endless belt type abrading
and ID are of a suf?cient length to permit the
free oscillation of the abrasive belt.
-
When the effective abrading surface of the belt
9 becomes worn a new belt member is placed on
65 means as a unit in a direction substantially
transversely of the direction of movement of the
respective articles.
‘
,5. The method of reducing a plurality of arti
the respective pulleys 1 and Ill.
cles to desired contour shape and size compris
From the foregoing description it will be seen
ing independently supporting said articles to ro
that simple, efficient and economical means and 70 tate about relatively ?xed centers with the edges
methods have been provided for accomplishing
thereof in engagement with a substantially end
all of the objects and advantages of the invention.
less belt type abrading member with said articles
Having described my invention, I claim:
being disposed in spaced relation with. each other
1. In a device of the character described, abra
sive means in the form of an endless belt. means 76 longitudinally of said abrading member, simul
2,404,844
7
taneously varying the plane of movement of each
section of said endless belt type abrading member
engaging the respective articles independently
and by controlled amounts toward and away from
the center of rotation of the articles during the
rotation of said respective articles and simultane
ously cleansing the e?ective abrading surface of
said endless belt type abrading member.
8
ter and in continuous engagement withsaid abra
sive' means, said ‘article being rotated in a direc
tion opposite the direction of movement of said
abrasive means, means embodying a former and
a contact shoe having a portion with a relatively
?at surface engaging the endless belt type abra
sive means adjacent the article and movable with
the contact shoe for altering the plane of the
‘ 6. A device of the character described compris
relatively ?at surface portion and the portion
ing abrasive means, means for supporting and 10 of the abrasive means engaged thereby relative
rotating a lens in a relatively ?xed position and
to the center of rotation of the article during the
in continuous engagement with said abrasive
rotation thereof and for causing saidrportion of
means, said abrasive means being in the form of
the abrasive means to remain substantially ?at.
an endless belt, means for supporting and mov
10. A device of the character described com
ing said abrasive means in 1a direction opposite to
prising abrasive means of an endless belt type,
the rotation of the lens, means for retaining an
means for supporting and moving said abrasive
area portion of the abrasive means adjacent the
means in a given direction, means for supporting
lens in a. single flat plane and means for alter
and rotating an article to be edge abraded by said
ing the position of said area portion relative to
abrasive means about a substantially ?xed center
the center of rotation of the lens during said ro
tation while retaining said area, portion in said
single ?at plane.
7. A device of the character described compris
ing abrasive means in the form of an endless
and in continuous engagement with said abrasive
means, said article being rotated in a direction
opposite the direction of movement of said abra
sive means,_ means embodying a former’ and a,
belt, means for supporting and moving said abra- . .
sive means in a given direction, means for sup-'
porting and rotating an article to be edged by
said abrading means in continuous engagement
therewith and in a direction opposite to the move
contact shoe having a portion with a relatively
?at surface engaging the ‘endless belt type abra
sive means adjacent the article and movable'w'ith
the contact shoe for altering the'plane of therel
atively flat surface portion and the portion of
the abrasive means engaged thereby relative to
the center of rotation of the article during the
ment of said abrasive meansv and means for, re
taining the area portion of the abrasive means
adjacent the article in a single horizontal flat
plane and for moving said area portion adjacent
the article toward and away from the center of
rotation of said article and means for shifting
the abrasive means in a direction transversely of
the direction of rotation of the article.
rotation thereof and for causing said portion of
the abrasive means to remain substantially flat,
and means containing a cleansing and wetting
bath through which a portion of said endless'belt
type abrasivemeans is adapted to travel during a
the movement thereof.
’
11. A device of the character described com
prising an endless belt type abrasive~ means,
8. A device of the character described com
prising abrasive vmeans in the form of an. endless
means for supporting and moving said abrasive ' i
belt,rmea‘ns for supporting and moving said abra~
means in a ‘given direction, a plurality of work
sivemeans in- a given direction, means for: sup
supporting members disposed in spaced relation
with each other longitudinally of said abrasive
means; each of said‘ work supporting members‘
ticle. while held in said position in continuous en
embodying means‘ ‘for supporting said work in
gagement with said abrasive means and means
combination with drive means for rotating said
for retaining the area portion of the abrasive 45 work about a relatively ?xed center with the
means adjacent the article in a single ?at plane
work in continuous engagement with the abrad
and for shifting said area portion while, retained
ing
surface of said abrasive means, means for
in said flat plane toward and away from the cen
causing the area portion of the abrasive means
ter of rotation of the article during the rotation
adjacent the respective pieces of work to remain
porting an article tov be edge abraded substan
tially in a ?xedposition and for rotating said ar
thereof,
.
' 9. A device of the character described com
50
'in- a- relatively ?at plane and for moving said area 7
‘portions toward and away from the center of ro
tation of said- work pieces and means for selec
prising abrasive means of an endless belt type,
means for supporting and moving said abrasive
tively‘ rendering said- respective drive means o'p
means in a given direction, means for supporting
erative or inoperative as desired.’
,
55
and rotating an article to be edge abraded by said
abrasive means about a substantially ?xed" cen
GEORGE- w. JACKSON.=
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