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Патент USA US3037341

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June 5, 1962
J. c. DIPPREY l-rrAL
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3,037,331 *
LENS GRINDING DEVICE
Filed NOV. 23', 1959
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2 Sheets-Sheet 1
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June 5, 1962
3,037,331
J.' C. DIPPREY EI'AL
LENS GRINDING DEVICE
Filed Nov. 25. 1959
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2 Sheets-Sheet 2
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James C". ?qoprey
Jane M Ja/m/n‘er
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ATTORNEY
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United States Patent
3,037,331
Patented June 5, 1962
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such a manner as to rotate said pulleys in alternating
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3,037,331
LENS GRINDING DEVICE
James C. Dipprey and Jesse J. Sandifer, both of
149 Herman Professional Bldg, Houston, Tex.
Filed Nov. 23, 1959, Ser. No. 854,750
8 Claims. (Cl. 51—123)
directions when the motor 21 rotates the pulley 19. An
idler pulley 23 is mounted on the support 24 and is pro
vided to maintain the proper tension on the belt 20.
To provide means for oscillating the shaft 3, a gear
25 is mounted on one of the shafts 18 and a bearing 26
supports the drive shaft 27 on which the gear 28 is
mounted. On the opposite end of the shaft 27 is a wheel
28 having a transverse slot 29 formed in the outer face
This invention relates to new and useful improvements
in a lens grinding machine.
It is an object of this invention to provide a device 10 thereof in which the guide 30 is adjustably mounted. Piv
otally secured to the guide 30, as by the nut 31, is the shaft
for grinding lens, such as optical lens, in the manufac
32 which is pivotally secured at its opposite end to the
ture of contact lens, providing means for single or mul
shaft 3. The degree of oscillation of the shaft 3 is de
termined by the position of the guide 30 in slot 29.
It is another object of the invention to provide a lens
In operation, the lens to be ground is placed in the
grinding device having novel means for rotating the 15
cap 34 and the cap 34 is mounted on the end of the
grinding spindles in opposing directions to effect a bal
tiple grinding having novel pivotal lens holding arms.
anced operation of the machine.
It is still a further object of the invention to provide
member 9 and placed in contact with the end of the
grinder 14 and the motor started, rotating the pulley 19
a lens grinding device having novel means for oscillating
and shaft 18 and spindle 113, the amount of pressure neces
tact with the grinding wheels.
With the above and other objects in view, the inven
rotate in one direction and the second, fourth and sixth
the shaft on which the lens holding arms are mounted to 20 sary for each particular lens grinding being applied
through the Weight 11. The pulleys 19‘ are rotated in
impart a rolling action on the lens as they ‘are in con
opposing directions, that is, the ?rst, third and ?fth pulley
pulley rotate in the opposing direction, thus balancing
tion has relation to certain novel features of construc
tion, operation and arrangement of parts more particu 25 the machine as the spindles 13 are rotated. Any one or
more of the arms may be employed, so that one or more
larly de?ned in the following speci?cation and illus—
lens may be simultaneously ground. When the work re
trated in the accompanying drawings, wherein:
quires oscillation of the shaft 3, the wheel 28 is employed,
FIGURE 1 is a front elevational view of the device,
causing the shaft 3 to oscillate across the face of the
showing one lens holding arm in lens grinding position.
FIGURE 2 is a side elevational View of the device, 30 panel 2, and the lens in the caps 34 will be moved across
the end face of the grinders 1-4, rolling with the contour
partially in cross section taken on the line 2—2 of FiG—
of the grinder end, the gear 28 being rotated by the gear
URE 1.
25, and the guide 30 being positioned in the slot 29 ac.
FIGURE 3 is an enlarged fragmentary view of the
cording to the length of each stroke desired. The gear
juncture of one of the lens holding arms and the shaft
35 28 is much larger than the gear 25 so that the oscillating
on which they are mounted.
action will be relatively slow compared to the speed of
FIGURE 4 is a rear elevational view of the device,
rotation of the spindles ‘13.
partially in cross section.
While the ‘foregoing is considered a preferred form of
FIGURE 5 is an enlarged fragmentary view, illustrat
the invention, it is by way of illustration only, the broad
ing the oscillating means employed.
FIGURE 6 is a fragmentary cross sectional rear ele
vational view, illustrating the gear connection for oscil
lation of the lens holding arms, and
FIGURE 7 is an end elevational view, in cross section,
taken on the line 7--7 of FIGURE 6.
Referring now more particularly to the drawings, the
numeral 1 designates a housing of any suitable material,
the front panel 2 of which is inclined upwardly and
rearwardly from a point adjacent the bottom of the
housing. A lens holding shaft 3 is mounted on the
panel 2 and a plurality of lens holding arms as 4, 4 are
pivotally mounted on the shaft 3. Suitable supporting
means as 5, 5 maintain the shaft 3 spaced outwardly
from the panel 2.
principle of the invention being de?ned by the appended
claims.
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What we claim is:
1. In a lens grinding device, a housing having a lens
holding arm shaft mounted thereon, a plurality of lens
holding arms pivotally mounted on said shaft, spindles
rotatably mounted in said housing and grinders mounted
on said spindles, one end of said arms extending over
said grinders, lens holding means in which lens to be
ground are mounted, said lens holding means being main
tained in grinding position on said grinders by said lens
holding arms and means on the other ends of said lens
holding arms for applying pressure on said lens during
grinding operations.
2. In a lens grinding device, a housing having a lens
Each arm 4 extends outwardly from the bearing 6 and
is maintained at the desired position on the shaft 3 by 55 holding arm shaft mounted thereon, a plurality of lens
holding arms pivotally mounted on said shaft, spindles
means of the collars 7, 7. Suitable locking means, such
rotatably mounted in said housing and grinders mounted
as the Allen screws 8, 8 maintain the collars 7, 7 in posi
on said spindles, lens holding means in which lens to be
tion. The extended ends of the arms 4 are inwardly turned
ground are mounted, said means being maintained in
forming the cap receiving members 9, 9. Suitable count
erbalance means, such as the members 10‘, 10 extend out 60 grinding position on said grinders by one end of said lens
holding arms, said lens holding arms being mounted in
wardly from the bearings 6, 6 and counterbalancing
bearings on said shaft, and said bearings also having ad
weights as 11, 11 are mounted on the members 10, 10, the
justable weights extending outwardly therefrom for ap
weights 11 being movable longitudinally on the members
plying pressure to said lens while being ground.
10‘, 10 to the desired position.
3. ‘In a lens grinding device, a housing having a lens
The panel 2 is provided with a series of ports as 12 65
holding arm shaft mounted thereon, a plurality of lens
through which the grinding spindles 13, 13 extend.
holding arms pivotally mounted on said shaft, spindles
Grinders 14 are mounted on the spindles 13. Suitable
rotatably mounted in said housing and grinders mounted
retaining means, as the washer and nut 15, 16, maintain
on said spindles, lens holding means in which lens to be
the spindles 13, :13 on the housing. Pulleys 19 are
mounted on the opposite ends of the shafts 18 and a 70 ground are mounted, said means being maintained in
grinding position on said grinders by one end of said lens
motor 21 is provided with a pulley 22 and a belt as 20 is
holding arms, said lens holding arms having means secured
mounted on the pulley 22 and each of the pulleys 19, in
3,037,331
4
to the other ends thereof for applying a variable pressure
against said lens when said lens is in contact with said
grinders.
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4. ‘In a lens grinding device, a housing having a lens
holding arm shaft mounted thereon, a plurality of lens
holding arms pivotally mounted on said shaft, spindles
rotatably mounted in said housing and grinders mounted
lens retaining means mountable on said inwardly turned
ends of said arms, variable means for maintaining said
arms in one position under pressure, a series of spindles
in said housing, grinders on said spindles, means for ro
tating said spindles in said series in alternately opposing
directions, said arms being independently selectively mov
able into lens grinding position, a wheel mounted in said
on said spindles, lens holding means in which lens to be
housing having a transversely adjustable guide mounted
ground are mounted, said means being maintained in
in the outer face thereof, a shaft connected at one end
grinding position on said grinders by one end of said 10 to said guide and at the other end to said lens holding
lens holding arms, adjustable 1Weights on the other ends of
arm shaft and means for rotating said wheel.
said arms positioned to apply pressure on said lens when
8. In a lens grinding device, a housing having vertical
in lens holding position, and means for oscillating said
Walls, a lens holding arm shaft on one vertical wall of
lens holding arm shaft when said lens holding arms are
said housing, freely rotatable bearings mounted on said
in position for maintaining said lens in contact with said
shaft, each of said bearings having a laterally extended
grinders.
lens holding arm, a laterally extended adjustable weight
5. In a lens grinding device, a housing having a lens
mounted in each of said bearings, said arm and weight
holding arm shaft mounted thereon, a plurality of bearings
forming substantially a ninety degree angle, the extended
loosely mounted on said shaft, lens holding arms extend
ends of said arms being inwardly turned, lens holding
ing laterally from said bearings, spindles rotatably mount 20 means on said inwardly turned ends, rotatable spindles in
ed in said housing and grinders mounted on said spindles,
said housing and extending through said vertical wall in
lens holding means in which lens to be ground are main
vertical alignment and beneath said shaft, grinders
tained, said means being maintained in grinding position
mounted on one end of said spindles, said grinders posi
on said grinders by one end of said lens holding arms,
tioned in said housing to be contacted by said lens holders
adjustable weights extending laterally from said bearings
when said arms are in one position, said Weights main—
at a position to apply pressure to the free ends of said
arms when in position on said lens holding means and
variable means for oscillating said lens holding arm shaft
when said lens holding arms are in position for maintain
when the arms are in one position and maintaining said
arms and lens holders in raised position out of contact
ing said lens in contact with said grinders.
6. In a lens grinding device, a housing, a lens holding
arm shaft mounted on said housing, a plurality of lens
holding arms having one end pivotally mounted on said
taining pressure on said lens holders against said grinders
with said grinders when in another position.
References Cited in the ?le of this patent
UNITED STATES PATENTS
shaft, the other end of said arms being inwardly turned,
970,674
justable weights for maintaining said arms in one posi~
tion under pressure, a series of spindles in said housing,
means for rotating said spindles in said series in alternately
2,715,803
2,754,638
2,822,647
2,880,556
2,916,857
lens retaining means mountable on said inwardly turned 35 2,247,706
2,383,501
ends of said arms, the other ends of said arms having ad
opposing directions.
7. In a lens grinding device, a housing, a lens holding
arm shaft mounted on said housing, a plurality of lens
holding arms having one end pivotally mounted on said
shaft, the other end of said arms being inwardly turned,
Williams _____________ __ Sept. 20,
Goddu ________________ _- July 1,
Powell ______________ __ Aug. 28,
Bronson _____________ __ Aug. 23,
Duffens et al. _________ .._ July 17,
Ripps et al ____________ __ Feb. 11,
Schelling _____________ __ Apr. 7,
Dargie _______________ __ Dec. 15,
1910
1941
1945
1955
1956
1958
1959
1959
FOREIGN PATENTS
454,231
Italy ________________ __ Jan. 14, 1950
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