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Q¢t-1,1946.
_W.OWENY-ETAL
"
APPARATUS FOR CUTTING PRISMS
Filed April-1.1, 1944 1
2,408,530
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Oct- 1, 1946...v
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2,408,530
APPARATUS FOR CUTTING PRISMS
> Filed April 11, 1944
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Oct'. 1,.1946'.
w. ovwEN ETAL
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APPARATUS FOR CUTTING PRISMS
Filed April 11, 1944
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APPARATUS FOR CUTTING PRI'SMS
Filed April 11, 1944
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Oct. 1, 1946.
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APPARATUS FOR CUTTING TRISMS
Filed‘ April 11, 1944
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W. OWEN EI'AL
APPARATUS FOR. CUTTING PRISMS'
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‘APPARATUS FOR CUTTING PRISMS
Filed April 11, 1944
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APPARATUS FOR CUTTING PRISMS
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2,408,530
Patented Oct. 1, 1946
UNITED . STATE
3 PATE NT‘ OFFICE
2,408,530 ‘
APPARATUS FOR CUTTING PRISMS '
. William Owen, Pittsburgh, and Ivan G. Peck, Ford
" " City, Pa., assignors to Pittsburgh Plate Glass
Company, a corporation of Pennsylvania
‘
Application April 11, 1944, Serial No. 530,576
12 Claims.
(Cl. 125—14)
2
1
Fig. 2 is a front elevation of the structure shown
in Fig.‘ 1; Fig. 3 is a combined horizontal section
This invention relates to cutting apparatus and
it has particular relation to apparatus designed
to cut or saw off pieces'rof glass from a slab or _
sheet.
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I
,
.
One" object of the invention is to provide an
improved apparatus for cutting off pieces of glass
of predetermined shape from a body of glass.
Another object of the invention is to provide
an improved apparatus for cutting prisms from
and plane of the apparatus, the section being
taken substantially along the‘line III-III of
Fig. 2 ;' Fig.‘ 4 is a‘rvertical section of a work
clamping and positioning chuck included in the
apparatus; Fig. 5 is a combined plan and cross
section of the chuck, the section being taken
substantially along the line V--V of Fig. 4; Fig.
6 is a cross-section of the chuck taken substan
10 tially
along the line VI-—VI of Fig. 4; Fig. 7 is
a slab or plate of glass.
Another object of the invention is to provide ‘ -
an improved mechanism for holding and direct
a fragmentary cross-section of a turret portion
of the chucktaken substantially along the line
VII—VII of Fig, 5; Fig. 8 is a plan of the chuck
an improved chuck structure for positioning .15 and associated elements with portions being
ing cutting elements to a plate of glass.
Another object of the invention is to provide
and repositioning a vglass plate for successively “ omitted to emphasize details; Fig. 9 is a frag
mentary plan of a glass positioning bu?er and
its'mounting; Fig. 1.0 is a fragmentary cross
section taken, substantially along the line X—X
an improved method of sawing a glass plate into
of Fig.- 9; Fig. 11 is a fragmentary perspective of
the form of prisms.
'
20 portions
‘of the chuck; Fig. 12 is a fragmentary
A conventional method'of cutting relatively
cutting off prisms of symmetrical form.
Another object of the, invention is to provide
thin or even very thick glass involves the use of
a diamond cutter, or scoring wheel, “which merely
scores or cuts the glass surface. The glass is
vertical section of a dash-pot arrangement em
ployed} in the apparatus, the section being taken
substantially along the line XII—XII of Fig. 2;
then cracked or snapped along the scored line. 25 Fig. 13 is a bottom plan of the piston employed
as a part of the dash-pot; Fig. 14 is a combined
This operation which is referred to as running
side elevation and vertical section of an alter
cuts is practical for ordinary plate or sheet glass,
nate form of chuck structure; ‘Fig. 15 is a plan
although the'snapped edges are not ‘entirely uni
of the chuck shown‘ in Fig. 14; Fig. 16 is a com
form. The snapped edges follow generally a
plane at right angles to the surface of the ‘glass. 30 bined'plan and longitudinalsection of the chuck
shown inFig. 14, the section being taken sub
However there is‘ no ‘definite control as to direc
stantially along the line XVI-XVI of Fig. 15;
tion of breaking and the edges may be ragged.
Fig. 17 is a cross-section taken substantially
When it is desired to cut glass at vangles to the
along the line XVII-XVII of Fig. 16; and Fig.
plate surface,‘ scoring the glass and running cuts
18 is'a; perspective of a prism produced by the
in the manner mentioned above do not apply.
For example, "in making prisms, a plate or slab
apparatus; .
of glass must bei‘cut entirely "through its body
in order to provide the‘proper' ‘shape. A prac
tical structure embodying our invention for this
’
‘
_‘
'
In practicing theinvention a stationary frame
[0 is provided with upright front and rear sides
I2 in which two swinging cutter frames M are
purpose includes an apparatus which cuts a slab 40 supported, and wherein each cutter frame is
of glass in predetermined planes by employing
‘rotatable disk cutters which are so designed as
to saw the glass effectively without marring the
mounted upon horizontal bearings I5 carried by
‘the sides l2. The, bearing axes of the two out
ter frames are parallel and disposed in the same
Each cutter frame includes a.
chuck is included in the apparatus‘ for; alter 45 lower relatively heavy or weighted cradle section
It upon which an electric motor 20 is mounted in
nately presenting the glass to the cutter in such
such manner, that the ‘weight of each-motor is
manner that the plane of one cutting operation
carried below the; axesof- the bearings l5 and
is disposed at right angles, or at any other angle
the centeroi gravity of the entire swinging frame
desired, to the plane of the successive cutting op
eration. The‘ glass to be cut'yis'prepared in the 50 vis below such bearings. > A horizontal driven shaft
prism sides formed thereby. A specially designed
. form of slabs of rectangular cross-section-and
' horizontal plane.
2| of ,each motor is axially aligned with respect
the cutters are applied to the edges or narrower
to the bearings 15 of the cutter frame upon which
sides of the slab.
the motor is mounted.
'
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"Transmission pulleys Hand 25 which are rig
Fig. 1 is a side elevation of a cutting apparatus; 56 idly secured upon each motor shaft "2i and upon
In the drawings:
I
»
25,468,536
1
4
3
an upper horizontal shaft 26, respectively, of each
cutter frame, are connected by means of ?exible
the rod. These weights, through their connec
tions to the upper portion of the swinging cutter
Each cutter shaft 26 is rotatably mounted in
frames, are sufficiently heavy to overcome the
weight of the motors and the lower weighted por
tions of the swinging frames l4 and thus force
the cutter disks toward each other. The relative
horizontal bearing supports 29 formed in the
movementlof the cutters toward each other is
upper portion of the swinging frame l4, and is
regulated by the amount of fluid permitted to
flow through each bleeder valve '10 and the re
transmission members 27, trained thereabout.
The latter can be in the form of V-belts, chains,
or the like.
disposed parallel to the ‘motor shaft 2|. The end
of each cutter shaft 26 opposite the transmission '10 sistance of the ?uid to such movement.
pul‘ey 25 rigidly supports a metal disk cutter 3!!
having an outer cutting section 3! (Fig. 8) inv
A chuck 160 for supporting a glass slab or plate
ting portion of each disk 30 is infused primarily
with diamond particles. Arcuate casings or
housings 34 are rigidly mounted upon the bearing
supports 29 and partially surround the disk cut-‘
wt to be cut by the disk cutters 39 is mounted
upon a vertical bearing disk £32 partially cut
away, as indicated at vHi3, and rotatable about a
horizontal axis in a segmental internal bearing
58!: formed in a vertical plate 105 that is rigid
with the apparatus frame If]. Radial ?anges Hi6
‘forming parts of the segmental bearing disk de
ters in such manner that they cover side por
?ne a bearing channel I07 between which mar
which very hard abrasive material capable of
cutting or sawing glass is incorporated. The cut- '
tions thereof while opposed cutting edges project 20 ginal edges of the upright frame plate 185 de
?ning the bearing I64 are disposed.
therefrom. These casings include cover'plates 35
secured to the casing body by means of bolts 35. i
It is to be noted that the disk cutters 39 are
disposed in the same vertical plane at the same
distance from the respective axes off‘the bearing
supports l5 and they are therefore movable in
The bearing disk 102 includes a radial shelf
569 which is wider than the thickness of the disk
and supports side plates I Hi rigidly bolted thereto
along their lower edges, as indicated at H2.
Upper and lower plates H4 and H5 are secured
between the side plates and are welded thereto
to de?ne a rigid box-like structure. ‘The lower
these bearing supports.
“ '
plate H5 (Fig. 11) is ?tted in notched portions
A pair of cables 48 are connected to brackets ,
M (Fig. 3) mounted rigidly upon the upper por 30 H6 adjacent the rear ends of the side plates HE!
and ?ts at its front or lower edge against an edge
tions of the swinging frames [4 and these cables
of the shelf I99. The inner or upper surface of
are trained over pulleys 45, which are mounted
the plate H5 constitutes in effect a continuation
rotatably on stud shafts 46, each rigidly carried
upon a plate 41. Stationary portions of the
of the upper surface of the shelf [89, and these
surfaces are the same plane. The opposite inner
frame It support these plates which are bolted
surfaces of the plates l|4—ll5 converge sym
thereon. Each cable 48 runs horizontally from
arcs toward and away from each other about
a pulley d5 at one side of the upper‘frarne to an
upper portion of the swinging frame M disposed
metricaily toward the center line, indicated at
dash-pot 58. (Figs. 12 and 13) which includes a
‘vertical rod 5! having a piston 52 rigidly secured
Hi’ (Fig. 4), of the chuck. Thus this center line
includes the axis of ‘rotation of the bearing disk
Hi2. Opposed wedges I29 having their outer sides
flush with the inner surfaces ‘of the plates
lid-H5 at substantially their clamped or closed
thereon and operableein avvertical cylinder 53
position are so designed that ‘their inner surfaces
adjacent the opposite side of the eg'iparatus.v
Each cablev at vits lower end is connected to a
are disposed in substantially parallel planes
tened to the upper'e'n'dlof the rod 5!. ,The c'yl-' ‘r “equally spaced fromthe center line of the chuck
when clamped on opposite sides of the glass slab
inder 53 is covered by a cap '55 having an open
lei. Relatively ‘thin liners l2] in the form of
ing 51 to slidablyreceive‘the rod 5| and this cap
containing a suitable fluid 54. The cable is fas
is screw-threaded on‘ the upper cylinder end.
metal plates lieflush against the inner parallel
The lower portion ofthe cylinderis in the form,
of a relatively large disk base ‘58"throug‘h which
bolts 5% are disposedto secure the cylinder'rigidly
surfaces of the’ wedges I29 and the outer liner
ends are bifurcated to form outwardly bent arms
upon a hour or other suitable support._
_
i213 which are further bent or hooked, as indi
cated at ‘H5, over the outer extremities of the
upper and lower plates H4 and H5; The outer
An irregular passage 68 communicates with
opposite sides of the piston 52 through the ‘body’ . end portions l2'6 of the wedges ‘are'reduced and
One-way flow of the fluid through
this‘ .' .eachyreduced portion lies between the arms i24
thereof.
_
passage is controlled by a ball valve '6] held
of one of the liners. The glass slab Hit fits be‘
against a valve seat 82 formed in the ‘piston
tween theseliners.
around the passage, A plate 64 which is secured
by screws 65 to the bottom of the piston traverses ,
‘
.
r
Centering strips I27 are disposed along the
inner sides of the plates 1 iii to engage opposite
the passage without closing it, and a coil spring (iii edges of the glass plate Ml. Set screws £29
61 is compressed between the plate 64 and the
threaded through the side plates iitl'pro'vide for
re?nements of adjustment in precisely centering
valve 6! normally to maintain the latter closed
the glass between the wedges. These Strips
against the seat 62.
'
A bleeder valve 10 is adjustably screw-threaded; which are loosely disposed between the Wedges
in a passage ‘H, also extending through the piston
body for communication from the upper to the
lower side thereof. This valve is in the form ‘of
a small tube having a lower. beveled wall 72
adapted tobe closed against a beveled seat "iii in _ .
the passage._ When the valve is seated it closes
openings‘lE formed through the beveledwalljof
are suf?ciently narrow to permit requisite move
ment of the wedges toward each other, and to
accommodate glass slabs of different widths. The
outer ‘ends of the strips ‘are bent over the outer
ends of the side plates Hi), as indicated at £30,
to prevent such strips from being accidentally
displaced.
The side plates Hi! and the upper and lower
plates !l4—ll5, which de?ne a rigid box-like
the vertical rods 5| upon which they are sup- . structure, support at their outer end portions
ported by a collar 80 that is rigidly mounted upon 75 segmental lugs l35 (Fig. 5) welded thereon to
the valve. Weights ‘Hi which are ‘notched, as in
dicated at ‘F9, are strung upon upper portions of
2,408.53!)
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laterally'ffrom'thebasin'. The trough and u -
provide a screw-threaded structure upon which
rightplatei are disposed substantially midway be
mounted. The axis of the turret is Coincident
with thecenter line II1. Handles I31 on the
tween the swinging cutter frames‘ I4. The trough
an internally ‘threaded turret I36 is rotatably
I6__2¢-extends ' to the "rear ‘side of the v‘apparatus
and‘ communicates witha rear tank I63 through
aspout I64 attached to, and leading downwardly
turret] facilitate its manual rotation upon the
chuck-which is rigidly mounted, as: indicated
above, on the bearing disk I02.
‘
from; the trough.’ Suitablebrackets I65 carry
'
theltank upon theframe. ‘The basin I6I also
circularplate-“or bearing disk I40 mounted
communicates with. theitank. I63 by means. of
uponthe. upper-side of the turret has a central
. q‘p‘emng I4I ‘therein through which the glass 10 conduits J61 attach'ed‘at‘their inner ends to the
lower'side of the basin .I6I. Their outer ends
‘extends and in whichioppositely disposed hinges
are disposed in the tank I63.‘
I42‘ are-mounted by welding one wing ‘I43 ‘of
eachihinge-to the upper side of the‘disk. The
andfare welded to the outer end portions of the
respective‘wedges‘1-EI20. It-is to benoted that
tliejotiter"~ sidesfofthe wedges I20 are sloped
'away“from_vthe;planes'of the opposite‘sides of
the g1ass’p1ate'IOI.
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is mounted upon the tank- I63-communicates with
the‘ interior thereof ‘and with fluid supply pipes
otherlwings I45 ofthehinges extend downwardly
' vVA, retaining ring ‘I46 which covers the outer
.
I A pump I69 of conventional construction which
I10; " Upper. 5endTportions of the pipes are mount- 1
ed upon'metal'nozzles I1I,~ which are attached to
the‘ housings 34 of the respective cutter disks 30.
A'brac'ket' I 12 supports each nozzle which is bolt
20 ed in place" in connection with a block I14 in
marginal portions of the " disk I40 is held in
‘properly spaced relation to the turret by means
of lugs I41 welded to thev‘ring and: bolted, as
indicated at‘ I49, to the outer walls ‘of the't'urret.
rThe ring I46, lugs I41; and upper side'vof the
which the nozzle and bolts {15 are mounted.
The
bolts-‘I15 extend through the block and bracket
to" provide a rigid mounting. 'The nozzles are
directed ‘downwardly immediately adjacentlthe
perimeter of the‘disk cutters 30 andto such po
sition that‘ continuous streams of water, or other
fluid, can bevdirected tothe points of contact be
tween the‘ disk‘cutters?i and the glass plate.
tively connected to the wedgesjin the manner
Stops I16. formed'uponthe plates 41 (Fig. 3)
speci?ed. "From. this "description it will be ap
parent that, in response to rotation of the tur 30 ‘which supports the vstud shafts .46 are disposed
in the pathlof’m'ovement‘ of the cutter frames I4
ret, the wedges I20‘ are moved‘ in substantially
against‘ which they rest
their openor out
axial directions along the inclined opposed sur
turret I36 thus provide a bearing which is
rotatable relative to the disk I40 which is posi_
wardly disposed positions." As these frames H4
approach such position latches I19, which are
hinges I42 so that they can be pivoted to spread 35 secured at their inner ends upon the respective
cutter housings by’ means of bolts I89, automati
their lower ends and to release the gripped glass _
cally l'atchlbehind the upper opposite edges of
‘plate. *Conversely these wedges can clamp the
the basin‘ I6I. The outer end portions of the
plate of glass disposed'between them‘ after such
latches
have beveled surfaces I81‘ which ride over
‘wedges are forced downwardly and at the same
the edges of the basins and then the end of the
time. their lower end portions are forced toward 40 latch
drops to catch latch shoulders I82 behind
faces of the upper and lower plates I I4-I I5, while.
at the same time they are pivotable upon the
each‘ other by the converging inner surfaces or
'walls of the plates II4-—I I5. Since the’wedges
are symmetrical, glass plates of different thick
nesses can be centered withrequal facility.
I- It. will be observed that the rigidstructure of ‘
‘theychuck (Figs. 1 and 4)‘ rests upon a stop I50
formed on the stationary upright bearing plate
I05. This stop is so positioned that the chuck
these edges. The latches can be released man;
vually'by manipulating handles i34 welded there
on.'-v Ea'clilatch I19 is normally maintained in a
substantially horizontal. position by means of one
of the housingzassembling bolts 33 against which
it normally rests.‘
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'PIn' ‘operating the apparatus so far described,
‘the turret I36 i'sadjusted so as to permit the glass
vand, in consequence its center line -I I1, is dis- ,.
eIilI’» to ‘be? inserted between the wedges I20. The
'posed'at an angle of 45°‘ to the vertical." By
glassmislrinserted to such position that its inner
bodily shifting the chuck by the handles I31, it
end rests against the buffer I52 and is centered
can be'thrown' to the positionshown inbroken
'by2 manipulating the set-screws I29. as well as
lines of Fig. 1 and through an angle of 90°. The
by rotatingmthe turret to tighten thevwedges.
‘upper plate II4 then rests‘upon a vstop I5'I which M fsincethe glass .so positioned is ready to be cut,
also'positions the chuck at‘anangle of 45° to
"the vertical. In‘ either’ position the handles of
the?operator'releasesgthe latches I'i9 to permit
‘the "disktcutte'rs 1.30 to approach each ‘other in
the same plane ‘and engage opposite edges of the
glass under the force exerted ‘by the Weights 16.
'therebetween.
"The’cutte‘rsare:
thus urged from opposite direc
Y ' Inorder to gage the glass plate, a buifer I52 ‘"
tions against the ‘glass as they ‘are rotatably
(Figs. 8-10) is'mounted upon an‘ inner portion of
driven-by‘the motors 20, The cutting or sawing
‘the bearing disk I02. This buffer includes a side
operation
thus initiated from opposite directions
plate I54 and a central ?ange I56, the latterof
licontinue'siuntil a pair of stops I90 bolted on the
‘which is disposed in a slot I51 formed in. the H cutter housingsmeet and arrest movement of the
Ljdisk. '_ By manipulating a bolt "I59 ‘ extending
the turret can be operated'to loosen or tighten.
‘the wedges I20 with respect-to the glass disposed
‘through the sidevplate and through the slot; the
buffer can be adjusted toward’and‘away from the
end of [the chuck. A padjI60 ‘of rubber, or like
'material, covers the face of the bufferand is ce
mented or otherwise ?rmly secured thereto;
‘ The upper portion of the: apparatus frame rig
vidly supports a basin _I6'I immediately below the
disk cutters 30 in such manner that the upright
- cutter frames .toward veach other. At the time of
contact of the :stops, the disk'cutter edges are
su?iciently "spaced'to ‘avoid ‘contact with each
"other: .The‘glassis ‘then almost entirely severed.
»By'man'ipulating vone ._ or both'ofthe handles I9i
>mounted'rigidly onvthe housing 34, the cutter
rassemblies can'be ‘moved in the same direction
3 until-onexof. 'the- cutters ‘while still rotating cuts
‘chuck supporting‘ plate I05'traverses it and ex-Jw. llthroughltheremaining‘portion of-the glass.‘ The
“tends centrally of a trough ‘portion I62 leading 751‘ operator‘then removes the severed piece of ‘glass.
2,408,530
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The disks to can be moved in either direction to
?nish the severing operation in this manner by
one or the other cutters. Alternately, the oper
ator can move one cutter frame to its open or
bearing disk is thus rotatably supported between
the ring and the turret and rotates about an axis
coincident with the axis of the turret.
The plates 204 and 205 de?ne a hollow body
upon the outer end of which an externally screw
inoperative position and secure it there by its
latch I19, while the other cutter automatically
completes the severing of the glass under the
threaded collar 224 is rigidly secured by welding,
pressure exerted by the weights ‘[6.
axially aligned with the center line of the chuck.
The rate
or otherwise, in such manner that the collar is
of cutting can be regulated by adjusting the
The turret H6 is screw-threaded upon the collar
bleeder valve ‘I0. It will be noted that in severing 10 for the purpose of moving the wedges 206 between
the glass in this manner the plane of cutting is
the plates 205, thus clamping the glass in the
disposed at an angle of 45° to the center line I I‘!
same manner‘as that previously described'with
reference "to the operation of the chuck I00.
of the chuck,
The turret I36 is then rotated to relieve the
The collar 224 extends a su?icient distance in
clamping action upon the sides of the glass to 15 wardly beyond the edge of the turret to provide
. such extent that the latter can be slid forwardly
until the extremity of the severed portion is posi
tioned against the buffer I352 The chuck and
for a cylindrical bearing ‘surface 225 formed
thereon, which is axially aligned with the turret.
A bearing shoulder 226 is formedrin connection
disk I02 are then shifted 90° in the bearing I04 to
with the formation of the bearing surface.
the position shown in broken lines of Fig. 1. In 20
An additional bearing collar 230, which is
this position of the chuck, the disk cutters are
welded to the inner or lower end portion of the‘
applied in the same manner as that described
above. In connection with the second cutting
action, as in the ?rst, the plane of cutting is
vertical, but since the chuck I00 has been shifted
through an angle of 90°. from its position resting
upon the stop I50 to a position in which it rests
upon the stop I5I, the plane of cutting for the
second operation will be at right angles to the
first plane of cutting. Likewise, since the axis
of rotation of the bearing disk I02 and the axis
of rotation of the turret intersect substantially
at the center of the area of cutting, as indicated
box structure of the plates 204 and 205, is pro
vided with a bearing shoulder 23I adjacent its
inner edge. The bearing portions of the collars
224 and 230 which are axially aligned are rotat
ably mounted in bearing rings 232 and 233 which
are, in turn, mounted rigidly by welding in a sub
stantialiy semi-cylindrical bearing support 234.
The latter constitutes a rigid portion of, or is
welded upon, the upright frame plate 20I. A
narrow bearing ?ange 235 is formed on the lower
inside edge of the lower ring 233 to cooperate
with the shoulders 226 and23I in maintaining
at “)2, the cutting of the glass in alternate posi
the chuck in its proper position in the bearing.
tions of the chuck produces prisms I93, such as
that shown in Fig. 18. Each prism comprises
equal faces I95 disposed at right angles to each
other and a third face I95 disposed at angles of
45° to the equal faces. After the prisms have
The chuck 200 is supported upon the plate 201
been cut in this manner they are ground and
polished to ?nish the product.
An alternate arrangement of glass positioning
chuck 200 is shown in Figs. 14-16 in which a rigid
plate 20I is mounted on the apparatus frame I0
in the same manner as the plate I05 and corre
sponds substantially thereto. The chuck 200 pre
sents a glass plate 202 to the disk cutters 30 at
substantially the same position as that shown
with reference to the construction already de
at an angle of 45° to the vertical.
A handle 236 which is rigidly secured by weld
ing or otherwise to one of the side plates 204 ex
tends laterally therefrom and can be manipu
lated to rotate the chuck about its axis through
an angle of 180°. The angle through which the
chuck is rotatable is gaged by the semi-cylindri
cal support 234, the opposite edges of which serve
as stops at the limits of the 180° movement.
45 After the disk cutters 30 sever the glass, as in
dicated in Fig. 14 and as previously described,,the
chuck is rotated through an angle of 180° about
its axis, and then the turret is operated to per
mit resetting of the glass. In this manner alter
scribed, and hence repetition of description of the 50 nate cuts through the glass will be at 90° to each
other, although opposite edges .of the glass are
cutters with their motors and control devices is
alternatelylpresented to one of the cutters.
not necessary.
'
The chuck 25.0 comprises side plates 204 and
A buffer 240 similar to the buffer I 52, is
mounted upon the frame plate 20l and comprises
upper and lower plates 265 rigidly secured to
gether by welding, or the like, to enclose opposed 55 a rubber facing_24I cemented to a flange 242
which constitutes a part of a side plate 243 dis
slidable wedges 256 that are faced with liners 201
posed at right anglesthereto' A ‘slot or guide
between which the glass plate is inserted. Metal
245 in the plate 20I receives a bolt 246 which ad
centering strips 209 are disposed loosely adjacent
justably clamps the side plate 243 to the frame
the side plates .of the chuck and are adjustable
against the edges of the glass by means of set 60 2%“. A central guide ?ange 241 integral with
the side plate 243 is guided in the slot to facilitate
.screws 2H), which are threaded through these
the adjustment of the buffer. This buffer op
plates. The liners 201 and centering strips 209
are bent or hooked over the outer ends of the
erates in the same manner as the buffer I52 in
plates 235 and 204, as indicated at 2“ and 2I2,
gaging the position of the glass plate.
65
In connection with the operation of the several
mechanisms described above, the glass plates can
respectively.
Outer ends :of the wedges are re
duced in width and are rigidly connected by weld
ing .to hinges 2 I4, which are, in turn, rigidly con
nected to a circular bearing disk 2I5 rotatable
be sawed or'cut at proper angles to produce the
types of prism required. After the cutting op
eration has been completed the prisms, which
70 are somewhat rough along their sawed surfaces,
are subjected to ?nishing operations, such as
grinding and polishing the surfaces until they
lation. Lugs 220, welded to the ring 2 I ‘I at spaced
exhibit the required re?ecting characteristics.
locations around its circumference, are secured
Although illustrative forms of the invention
to the turret by means of screws HI and serve
to space the ring properly from the turret. The 75 have been shown and described in detail, it will
axially of a turret 2I6 between an outer retain
ing ring 2 I7 and the turret. Handles 2I9 mount
ed on the turret provide for its manual manipu
2,408,530;
10
,
without departing from the spirit of theainven-f
opposite portionsof theg'lass plate. to “the cutters
at substantially equal angles, to said plane, means
connected to the cutters for urging the'mftoward
eachlother againstppposite portions :or saidpla'te;
tion orvfrom; the scope of the appended claims. ’
. and ‘power meanslconn'ected to the cutters for
be apparent to those skilled in the .art_:t_hat;the
invention is not speci?cally limitedto sucn'fornis,
butiithat various changes can be made therein
We claim:
7
-
driving them in 'cuttingrelation. ,,
-
' a pair ‘
1. Aglass sewing apparatus- comprising
_
,
v.
,
,
._
,, 6. Ina glasssawing' apparatus, a pair of cutters
disposedein 'substantiallythe same plane,,a frame
of disk cutters disposed in substantially the same
plane, means supporting said cutters for move
structure supporting said'cutters for movement
ment toward and away from each other in said 10 towardrand away from each other in said‘plane,
planepal-nsupportlfor positioning a glass slabbej
tween saidcutters, means connected to the cute,
ters and urging them toward‘each otheragainst
a chuck‘havingv ,a centerlline intersecting said
plane at an angle of,predetermineldjvalue, means
in 'said chuck for gaging the work therein‘alon'g
said center lineto a, position to,.bev severed by"
opposite portions of the glass slab, stopson the
cutter supporting means to limit movement of 15 said ‘cutters’, said chuck, and supporting vffra'me
including chuck 'shifting'?means‘for.alternately
the cutters toward each. other and permitting
presenting opposite portions oféthe work in ' said
concurrent movementzofthe cutters in the same
plane at angles equal ft'olsaid» angle of ,predeterj
direction after said stops engage each other, and
power means connected to the cutters for rotate
ably driving them“
'
H
i
»
I
~
mined value, means connected to'the cutters for
urging them toward eachlo-th'er against. opposite
. ,2. A glass sawing apparatus comprisinga pair ' ' portions of the work held by the‘ cutter, and'powe'r
of-abrasive disk cutters disposed in substantially
the same plane for movement toward and away
vmeans connecte'dtofthe cuttersfor drivingthemf
in',cutting';re_lation.
'
_
a
_
_
V
n ‘ 7.’ In a glass ‘sawing apparatus, a pair ofv cutters
from each other in said plane, a support forpo
sitioning a glass slab between said. cutters, 25
swingable frames supporting the respective cut-f ‘ i
ters and having weight members connected there:
disposed in substantially the sameplane, frame
structure supporting said cutters for movement
to to urge the cutters toward eachother in cut
a bearing in said frame structure having its bear
ing axis'disposed at an angle to: said’ plane, .a
ting relation against opposite portions of the
glass slab, bearing supports for the frames, re vso
tarding means operatively connected to the cut
ter supporting frames and yieldably disposed in
opposition to the force exerted by the weight
members during the cutting operation to deter
toward and away‘ from each other in said plane,
chuck unit’rot'a'table in said bearing and having
a centercline substantially'coaxially disposed with
respect to'said bearing axis, stop‘meanson'the
frame engageable with, the g’ chuck and limiting
rotative movement ‘thereof within an angle, of
mine speed of movement of the cutters toward 35 180° about'said bearing axis to present opposite
edges of the work in the chuck to the cutters and
each other, and power means connected to the
at equal angles to the plane of cutting, means
cutters for rotatably driving them.
associated with the chuck for gaging the work
3. A glass sawing apparatus comprising a pair
therein with respect to the plane of cutting and
of cutters disposed in substantially the same
plane, a pair of cutter supporting frames carry 40 along the center line of the chuck, means con
nected to the cutters for urging them toward each
ing the cutters toward and away from each other
other against-opposite sides of the work, and
in operative relation in said plane, means for
supporting a glass plate between said cutters,v power means connected to the cutters for driving
them in cutting relation.
actuating means normally urging the cutter sup- 7
8. Ina glass sawing apparatus, a pair of cutters
porting frames toward each other to present the 45
disposed in substantially the same plane, frame
cutters in cutting relation to the glass from op
structure supporting said cutters for movement
posite directions, retarding means connected to
toward and away from each other in said plane,
the cutter frames to regulate rate of feeding of
a bearing in said frame structure having its bear
the cutters against the glass, and power means
connected to the cutters for driving them in cut 50 ing axis disposed at an angle to said plane, a chuck
unit rotatable in said bearing and having a center
ting relation while they move toward each other.
line substantially coaxially disposed with respect
4. A glass sawing apparatus comprising a pair
of cutters disposed in substantially the same
to said bearing axis, stop means on the frame
engageable with the chuck and limiting rotative
plane, a pair of cutter supporting frames carry
ing the cutters toward and away from each other 55 movement thereof within an angle of 180° about
said bearing axis to present opposite edges of the
in operative relation in said plane, means‘ for
supporting a glass plate between 'said' cutters,
work in the chuck to the cutters and at eoual
actuating means normally urging the cutter sup
angles to the plane of cutting, means associated
porting frames toward each other to present the
with the chuck for gaging the work therein with
cutters in cutting relation to the glass plate from 60 respect to the plane of cutting and along the
opposite directions, dash-pot units connected to
center line of the chuck, a buffer adjustably
the cutter frames and normally urging them
mounted on said chuck unit in substantial align
toward each other in opposition to said actuating
ment with the center line of the chuck to gage
means to regulate the rate of feeding of the cut
the extent of advancement of the work to be out
ters against the glass plate, and power means 65 after each cutting operation, means connected
connected to the cutters for driving them in cut
to the cutters for urging them toward each other
against opposite sides of the work, and power
ting relation while they are moved toward each
other.
means connected to the cutters for driving them
.5. A glass sawing apparatus comprising a pair
_ in cutting relation.
of cutters disposed in substantially the same 70
9. In’ a glass sawing apparatus, a pair of
plane, means supporting said cutters for move
cutters'disposed in substantially the same plane,
ment toward and away from each other in said
a frame structure supporting said cutters for
plane, a chuck for supporting a glass plate be
movement toward and away from each other in
tween said cutters, reversible means operatively
said plane, a bearing in said frame having its
connected to said chuck for alternately presenting 75 bearing axis disposed in said plane, a chuck ro
2,40,13,530
-
11
,
tatable in said bearing and ‘having a center ‘line
intersecting said bearing axis, stop means on the
frame structure engageable with the chuck to
limit movement of the ‘latter about said bearing
axis to positions of equal angular relation to said
plane of cutting on opposite sides thereof, and
stop means associated with ‘the chuck for gaging
the work therein along said center line and with
respect to said plane of cutting, means connected
to the cutters for urging them toward each other 10
12
nected to the cutters for driving them in cutting
relation.
11. A chuck comprising an open ended, hollow
body having opposed interior surfaces converg
ing towards an open end of said body, opposed
wedges having surfaces slidably engaging respec
tively said converging surfaces for movement
toward and away from each other to grip and
release a piece of work ‘in response to sliding
movement of the wedges in the body, lining
sheets covering the inner surfaces of the wedges
and connected to said body to permit sliding
movement of the wedges with respect thereto,
in cutting relation.
.
’
and actuating means adjustably mounted upon
10. In a glass sawing apparatus, a pair of
cutters disposed in substantially the same plane, 15 said body and engaging the wedges to move them
along said converging surfaces.
a frame structure supporting said cutters for
12. A chuck comprising an open ended, hollow
movement toward and away from each other in
body ‘having opposed interior surfaces converg
said plane, a bearing in said frame having its
ing towards an open end of the body, opposed
bearing axis disposed in said plane, a bearing disk
wedges having surfaces slidably engaging respec
cut away centrally and mounted in said ‘bearing
tively said converging surfaces for movement to
in a second plane disposed substantially at right
ward and away from each other to grip and
angles to the plane of cutting, a chuck mounted
release a piece of work in response to sliding
upon ‘said disk for movement therewith in said
movement of the wedges in said body, center
bearing and having a center line in said second
ing strips disposed in the body adjacent oppo
plane intersecting said bearing axis, stop means
against, opposite sides of the work, and power
means connected to the cutters for driving them
site edges of the wedges, means in the body mov
ably engaging the strips to center the work in
said body, and actuating means adjustably
mounted upon said body and engaging ‘the
of cutting on opposite sides thereof, stop means
associated with the chuck for gaging the work 30 wedges to move them along said converging sur
faces.
therein along said center line and with respect to
WILLIAM OWEN.
the plane of cutting, means connected to the
IVAN G. PECK.
cutters for urging them toward each other against
opposite sides of the work, and power means con
on the frame engageable with the chuck to ‘limit
movement of the latter about said ‘bearing axis
to positions of equal angular relation to said plane
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