Improvements in Machinery for Bevelling Glass.
Year: 1890

page_text: Date of Application, 2nd Apr., 1890
Complete Specification Left, 2nd Jan., 1891-Accepted, 7th Mar.. 1891
PROVISIONAL SPECIFICATION.
Improvements in Machinery for Bevelling Glass.
I, HYPPOLITE BESSON, of 46, Bonner Road, Bethnal Green, in the County of
Middlesex, Mechanical Engineer, do hereby declare the nature of my said invention
to be as follows:-
My invention has for its object, improvements in machinery for bevelling glass
and it relates to that class of machinery for which Letters Patent have been granted
to myself and others, namely No. 7461 of the 9th day of May 1884, No. 8310 of the
9th day of June 1885 and No. 12,148 of the 24th day of September 1886 and it
more fully developes parts of these Patents, besides introducing new modes by
which I am able to bevil large glass more readily and quickly.
By these improvements I am able to rough, smooth & polish the bevil of the four
sides of large plates without taking the plate from its chuck or holder and I can
secure the glass or plate on its chuck or holder with certainty. I am also able to
control the parallelism or regularity of the bevel to be cut on the edges of the glass.
I also obviate the jerk or vibration of the return stroke of the carriage in its
alternating motion and also obviate the torsional strain which might occur when a
large glass is fixed on a chuck having an axis of rotation & I am further able to
arrange my machine so that one workman can attend to several machines.
According to my invention I construct a machine consisting of a carriage mounted
nearly vertically upon two parallel rails fixed at the same angle as the carriage
upon two standards, legs or brackets. Upon this carriage is hinged a pivoting
frame which carries a rocking head having a chuck mounted thereon & it is upon
this chuck that the plate of glass is secured. The rocking head which carries the
chuck may be composed of two upright screwed pillars and a base plate in or upon
which the two pillars are fixed.
This base plate is made to pivot or hinge upon the carriage by studs and bearings.
Each screwed pillar has a bracket bearing upon which the rocking head is carried
and the bracket bearings are fixed upon the screwed part of the pillars by means of
interior nuts.
.
Both brackets are raised or lowered at the same time either by level gear or a
worm & worn wheel or the pillars may turn & raise the bracket by means of bevel
or worm gear, or the brackets carrying the rocking frame and chuck may be raised
by hand & in that case the axis of the rocking frame may be made to deposses their
bearings & form handles & the nuts working the brackets & screwed pillars may
have equal corresponding parts of threads cut away so as to allow the nuts of
brackets to slide up and down the pillars.
Instead of the above plan I may construct the pillars hollow & fit inside each a
plunger or hollow or other piston in each which would be worked by hydraulic
pressure from an accumulator or pump having suitable pipes and joints connected
therewith or by any such suitable means. A small two way cock or valve having
one passage communicating with the accumulator or other supply head of water &
the other passage by a stop valve through an outlet. These two valves or cocks
are fitted upon the bottom plate, & lead to the two tube pillars. The attendant
will thus be able at any movement to connect the accumulator or other head of
pressure by the valve or cock and thus raise the chuck the required height & he
can likewise lower the chuck by opening the stop valve and these movements he
can accomplish quickly and without noise.
The pivotting of the hinged frame or the angular oscillations of the frame which
letermines the angle of the bevel to be formed on the edge of the glass by the
rougher may be effected by means of two screws worked simultaneously by either
vorm or bevel gear. The screws may be fitted in nut bearings which are fixed on
1177

page_text: the carriage. The spindle or centre upon which the chuck is mounted is fitted in
a journal or bearing formed, centrally upon the rocking head & is secured by a
circular bolt in a groove formed in the end of the spindle. The chuck upon which
the glass is fixed is generally a metal plate made perfectly flat & having formed in the
face small chambers or recesses each one of which communicates with a central hole
or passage in the spindle itself. Upon the flat face of the divisions or partitions
forming the recesses 1 fix, thin india-rubber cushions. The glass is fixed to the
plate by suction and also by a central clampbar as follows:-An exhaust chamber
of considerable capacity is fitted at the back of the carriage between the two
brackets and communicates with the back of the glass by means of india rubber or
other pipes or passages that is through the spindle and with the recesses. The
exhaust chamber has at least a partial vacuum always maintained therein which
may be accomplished in any convenient manner such for instance as by an air pump,
fan or other exhauster.
To secure the glass upon the chuck still more safely I may sometimes mount a
slotted arm on each pivot of the rocking frame & pass a light bar, having a central
screw, through the said arm. This bar can be adjusted so as to present the central
screw to the centre of the chuck.
Between the glass & the screw I fit a clamp plate or washer which is dished out
& has round its periphery a thin cushion of india-rubber, leather, flannel or other
soft material to press the glass.
The
The alternating or to & fro movement of the carriage is obtained by a rack or
screw nut fixed at the back of the carriage & is worked by a pinion or screw.
alternating motion may be produced by the changing of sliding of two belts, the
one being straight & the other being crossed & there may be three or four pullies
as convenient. The rack or screw nut may be mounted upon two sliding bearings
cach being fixed at the back of the carriage and also through round bearings formed
upon two brackets. Between the U brackets & the body of the rack or screw
nut is fitted helical or spiral springs which allow the rack or screw nut a certain
freedom to move backwards & forwards until one of the two springs is so compressed
as to carry the carriage and their action is as follows:-When the pinion or screw
is acting upon the rack or screw nut the said rack or screw nut is first moved &
slides on its bearing until it has compressed one of the springs on the side which
the alternative movement is to be made & depresses the spring on the other side.
When the compression of the spring has nearly destroyed the weight & momentum
of the carriage the carriage will change its direction of movement and travel in the
opposite direction until it receives another change of direction through the driving
belts and the compression of the spring.
Instead of the spring I may fit to the end of the rack a piston and cylinder to
work by compressed air which will produce the same effect. The turning or
manipulating the sides of the glass to be presented to the grinder or the alteration
of the parallelism of the bevel is obtained by worm screws fitted to the vibrating
frame upon bearings and engaging with parts of the worm wheel on the chuck. In
other cases the manipulation of the edge of the glass to alter the parallelism of the
bevel is obtained by a bar or arm fitted on the screw pillars at each end & connecting
the chuck by slot or pin or fitting in contact with one side of chuck. The bar on
the pillar may be altered at each or either end quite independantly of the other end
thus producing a similar effect upon the chuck.
The grinder stone or wood is vertical & fitted upon horizontal shafts centrally to
the machine which is supported upon two standards or brackets formed from the
machine or they may be fixed independant of the machines. The grinder is made
to press upon the glass until the desired bevel or effect is produced and this is
regulated by set screws-and-pressure weight or spring, or air pressure acting at one
end of the shaft through piston, cylinder, and valve.
Dated this 1
Ր
וי
1000
GEORGE BARKER,
77, Colmore Row, Birmingham, Agent for Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in Machinery for Bevelling Glass.
I, HYPPOLITE BESSON, of 46, Bonner Road, Bethnal Green, in the County of
Middlesex, Mechanical Engineer, do hereby declare the nature of my said invention,
and in what manner the saine is to be performed, to be particularly described and
ascertained in and by the following statement :-
My invention has for its object improvements in machinery for bevilling glass
and it relates to that class of machinery for which Letters Patents have been
granted to myself & others namely No. 7461 of the 9th day of May 1884
No. 8310 of the 9th day of June 1885 and No. 12148 of the 24th day of
September 1886, and it more fully developes parts of these Patents besides
introducing new modes by which I am able to bevil large glass more readily and
quickly.
By these improvements I am able to rough, smooth and polish the bevil of the
four sides of large plates without taking the plate from its chuck or holder, and I
can secure the glass or plate on its chuck or holder, with certainty. I am also able
to control the parallelism or regularity of the bevil to be cut on the edges of the
glass I also obviate the jerk or vibration of the return stroke of the carriage in
its alternating and also obviate the torsional strain which might occur when a glass
is fixed on a chuck having an axis of rotation and I am further able to arrange my
machine so that one workman can attend several machines.
The range of sizes of glass which may be operated upon my machine ranges
from small sheets such as 9 feet super. to large sheets of 56 feet super. and more
without taking the sheet of glass from its chuck.
According to my invention I construct a machine consisting of a carriage
mounted nearly vertically upon two vertical rails fixed vertically upon two
standards, legs or brackets, the contact between rail and carriage being made by
four wheels or rollers which are fitted to be vertical with the rails upon the
carriage. Upon this carriage is hinged a pivotting frame which carries a rocking
head having a chuck mounted thereon and it is upon this chuck, that the plate of
glass is secured. The rocking head which carries the chuck may be composed of
two upright screwed pillars and a base plate in or upon which the two pillars are
fixed. The base plate is made to pivot or hinge upon the carriage by studs and
bearings. Each screwed pillar has a bracket bearing upon which the rocking head
is carried and the bracket bearings are fixed upon the screwed part of the pillars
by means of interior nuts. Both brackets are raised or lowered at the same time
either by bevil gear or a worm and worm wheel or the pillars may turn and raise the
bracket by means of bevil or worm gear, or the brackets carrying the rocking
frame and chuck may be raised by hand and in that case the axis of the rocking
frame may be passed through their bearings and form handles and the nuts
working the brackets & screwed pillars may have equal corresponding parts of
threads cut away so as to allow the nuts of brackets to slide up and down the
pillars.
Instead of the above plan I may construct the pillars hollow and fit inside each
a plunger or hollow or other piston in each which would be worked by hydraulic
pressure from an accumulator or pump having suitable pipes and joints connected
therewith or by any such suitable means. A small two way cock or valve having
one passage communicating with the accumulator or other supply head of water
and the other passage by a stop valve through an outlet. These two valves or
cocks are fitted upon the bottom plate and lead to the two tube pillars. The
attendant will thus be able at any moment to connect the accumulator or other
head of pressure by the valve or cock and thus raise the chuck the required height
and he can likewise lower the chuck by opening the stop valve and these move-
ments he can accomplish quickly and without noise.

page_text: The pivotting of the hinged frame or the angular oscillations of the frame
which determines the angle of the bevil to be formed on the edge of the glass by
the rougher may be effected by means of two screws worked simultaneously by
either worm or bevil gear. The screws may be fitted in nut bearings which are
fixed on the carriage. The spindle or centre upon which the chuck is mounted is
fitted in a journal or bearing formed centrally upon the rocking head and is
screwed by a circular bolt in a groove formed in the end of the spindle. The
chuck end upon which the glass is fixed is generally a metal plate made perfectly
flat and having formed in the face small chambers or recesses each one of which
communicates with a central hole or passage in the spindle itself.
Upon the flat
face of the divisions or partitions forming the recesses I fix thin india rubber
cushions.
:-
The glass fixed to the plate by suction and also by a central clamp bar as
follows An exhaust chamber of considerable capacity is fitted at the back of
the carriage between the two brackets and communicates with the back of the
glass by means of india rubber or other pipes or passages that is through the
spindle and with the recess. The exhaust chamber has at least a partial vacuum
always maintained therein which may be accomplished in any convenient manner
such for instance as by an air pump, fan, or other exhauster. To secure the glass
upon the chuck still more safely I may sometimes mount a slotted arm on each
pivot of the rocking frame and pass a light bar having a central screw through
the said arm.
This bar can be adjusted so as to present the central screw to the
centre of the chuck. Between the glass and the screw I fit a clamp plate or
washer which is dished out and has round it periphery a, thin cushion of india rubber
leather Hannel or other soft material to press the glass.
The alternating or two and fro movement of the carriage is obtained by a rack
or screw nut fixed at the back of the carriage and is worked by a pinion or screw.
The alternating motion may be produced by the changing of sliding two belts the
one being straight and the other being crossed and there may be three or four
pullies as convenient. The rack or screw nut may be mounted upon two sliding
bearings each being fixed at the back of the carriage and also through round
bearings formed upon U brackets. Between the brackets and the body of the
rack or screw nut is fitted helical or spiral springs which allow the rack or screw
nut a certain freedom to move backwards and forwards until one of the two springs
is so compressed as to carry the carriage and their action is as follows:-When the
pinion or screw is acting upon the rack or screw nut, the said rack or screw nut is
first moved and slides on its bearings until it has compressed one of the springs
on the side which the alternative movement is to be made and depresses the spring
on the other side. When the compression of the spring has nearly destroyed the
weight and momentum of the carriage, the carriage will change its direction of
movement and travel in the opposite direction until it receives another change of
direction through the driving belts and the compression of the spring.
Instead of the spring I may fit to the end of the rack a piston and cylinder to
work by compressed air which will produce the same effect.
The turning or manipulating of the sides of the glass to be presented to the
grinder or the alteration of the parallelism of the bevil is obtained by worm screws,
fitted to the vibrating frame upon bearing and engaging with parts of the worm
wheel on the chuck. In other cases the manipulating of the edge of the glass to
alter the parallelism of the bevil is obtained by a bar or arm fitted on the screw
pillars at each end and connecting the chuck by slot or pin or fitting in contact
with one side of the chuck. The bar ou the pillar may be altered at each or either
end quite independantly of the other end this producing a similar effect upon the
-chuck.

page_text: 15
to press upon the glass until the desired bevil or erect is produced and this
regulated by set screws and pressure weight or spring or air pressure acting at one
end of the shaft through a piston, cylinder, valve.
In order that my invention may be clearly understood and more easily carried
into practice I have appended hereunto three double sized sheets of drawings upon
which I fully illustrate the nature of my said improvements.
Figure 1 is a front elevation of my machine with the clamp plate and the grinder
removed so as to more clearly shew the general arrangement of the various parts.
Figure 2 is a side elevation of same with grinder and clamp plate complete.
Figure 3 is a side elevation of a part of the machine shewing another mode of
operating the rocking head to form the angle of the bevil on the glass.
Figure 4 is a vertical section through the one of the pillars E when made hollow
with a piston for being worked by hydraulic pressure.
Figure 4 is a horizontal section through Figure 4 shewing the bracket a for
supporting the rocking head B.
Figure 5 is a plan of the arrangement of the disengaging gear.
Figure 6 is a plan of the rocking gear.
Figure 7 is a front elevation of a part of the machine shewing another arrange-
ment for raising the rocking frame.
According to my invention I construct a machine_consisting of a carriage Z
mounted nearly vertical upon two parallel rails L L fixed vertical upon two
standards, brackets or their equivalent K, K. The contact between rails L L and
the carriage Z is made by four wheels or rollers H, H fitted at the back of the
carriage so as to be vertical with the rails and serve as the centre to the weight of
the carriage and rocking frame i.e. the angle of the carriage upon the rails L, L, is
made to balance the weight of the rocking frame with chuck C and glass
frame E, E, E', E¹ which carries a rocking head B, B, b, b, Figure 6 having a
chuck C mounted thereon and it is upon this chuck C that the plate of glass A is
secured. The rocking head B, B, b, b, which carries the chuck C may be composed
of the upright screwed pillars E E, fitted to a base plate E', E. This base plate
is made to pivot or hinge upon the carriage Z by studs 7, in bearings q'. Each
screwed pillar E has a bracket bearing e upon which the rocking head B B Fig. 1, 2
is carried & the bracket bearing e, e, are fixed upon the screwed part of the
pillars E, E by means of interior thread. Both brackets e, e, with the rocking
head B, B are raised or lowered at the same time by means of the worm F and
worm wheel, which rotates the screw pillar E, E at the same time or by other
similar convenient means.
Instead of placing the gear to rise or lower at the top of the carriage, I may
place it at the bottom of the carriage as follows:-I provide a shaft O Fig. 7 a little
longer than the rails L L in two bearings upon a rigid frame 1, 1. At one end of
the shaft is mounted three pulleys. Upon the shaft is fitted two bevil wheels W', W¹,
to gear with wheels W, W which wheels are fixed at the bottom end of the upright
screw pillars E, E, the wheels W', W', are fitted upon the shaft O by feathers in a
groove which is cut the whole length of the shaft thus allowing the wheels W', W',
to slide upon the shaft O while receiving the alternative movement of the carriage
while they can rotate the screw E E Figure 7 and rise or lower the rocking
frame B, B.
Z
Instead of the above means for raising the rocking head B I may construct the
pillars E, E hollow and fit inside each a plunger or hollow piston D which would
be worked by hydraulic pressure and from an accumulator or pump having suitable
pipes and connections there with or by any similar means. A small two way
cock or valves d, dhaving one passage communicating with the accumulator
or other head of water and the other passage by a stop valve d' through an
outlet. These two valves d, d' or cocks are fitted upon the plate E', and lead
to the two tube pillars E, E. The attendant is thus able at any moment to
connect the accumulator or other heads of pressure by the valve or cock and
raise the chuck the required height and he can likewise lower the rocking head

page_text: with the chuck and glass, by opening the stop valve. The movement can be
accomplished quickly and without jerk or noise.
The pivotting of the hinged frame E, E, E', E', or the angular oscillations of
the said frame which determine the angle of the bevil to be formed on the
edge of the glass by the rougher, smoother, or polisher is done by means of
two screws worked simultaneously through worms V and worm wheels V' or
by any similar means. The screws are fitted between collars or carriages Z and
upon pillars by the collar sleeve V³ and pin.
Sometimes I may do away with this last means and make the rocking head
oscillate or pivot to form the angle of bevil on the edge of the glass so that I
obtain the oscillating angle by fixing on each of the pivots or axis P of the
rocking frame a lever P¹ controlled by set screws P' and spring p³ and at the
same time setting the distance of the advance of the grinder G to the glass A by
set screws g or by set collar g' 9' which would produce the same effect as oscillating
the frame E E E E. The spindle S Figure 6 or centre upon which the chuck C
is mounted, is fitted in a journal or bearing S' formed centrally upon the rocking
head B B, and is secured by a lever bolt J in a groove formed in the end of the
spindle S.
The chuck C upon which the glass A is fixed is generally a thin metal plate of
say or of an inch thick and perfectly flat and having formed in the face small
grooves, chambers, or recesses each one of which communicates with a central hole
or passage in the spindle itself, upon the flat face, or the divisions or partitions
forming the groove of recess, thin india rubber cushions are fixed.
The glass A is fixed to the chuck by suction and also by a clamp bar T as follows.
An exhaust chamber X of considerable size is fitted at the back of the carriage Z
between the two brackets K K and communicates with the back of the glass A by
means of india rubber pipe or other pipes which connect with the passage made
in the spindle and also with the recesses or grooves in the face of the chuck.
The exhaust chambers may be made rigid between the two brackets K K or may
be made to travel with the carriage as found convenient to suit the size of the
machine. The exhaust chamber has at least a partial vacuum always maintained
therein which may be accomplished in any convenient manner such for instance as
by an air pump fan or other exhauster. To secure the glass upon the chuck still
more safely I may sometimes mount slotted balanced arms t on each pivot P of the
rocking frame B B a light bar T having a central screw T¹ passing through the
said arms t, t. This bar T can be adjusted through the arms t t so as to present
the central screw T¹ to the centre of the chuck C which is essential when turning
the glass. Between the glass A and the screw T¹ I fit a thin clamp plate or
washer which is dished out and has round is periphery a thin cushion of india
rubber leather flannel or other soft material to press the glass without injuring the
surface.
The alternating or to and fro movement of the carriage is obtained by the rack R
fitted at the back of the carriage E E and is worked by a pinion R¹. This
alternating motion is produced by the sliding of two bolts, 1, 2, the one hung
straight and the other one crossed, and there may be three or four pullies as
convenient. The drawing shows three. The rack R is mounted upon two sliding
bearings r,, each being fixed at the back of the carriage Z and also through round
bearing formed upon two brackets R*. Between the brackets and the body
of the rack R is fitted a helical or spiral spring which allows the rack R
certain freedom to move backwards and forwards until one of the two
springs is so compressed as to carry the carriage. When the pinion R¹
is acting upon the rack R the said rack is first moved by the pinion and slides
on its bearing until-it-has-compressed one of the springs on the side which the
alternative movement is to be made and depresses-the-spring_on_the_other
side. When the compression of the spring has nearly destroyed the energy of the
stroke of the carriage gained by its velocity the carriage will change its direction of
movement and travel in the opposite direction until it receives another change of

page_text: direction through the driving belts and the compression of the spring. Instead
of the spring I may fit to the end of the rack R' a piston and cylinder to work by
compressed air passing through a small outlet which will produce the same effect.
When bevilling large pieces of glass it is necessary to have all parts of the
machine made heavy and strong in which case the pinion R would require to be
operated from the pulleys 1, 2 and 3 by means of intermediate multiplying gear
which would be fitted upon one side of the brackets K so as to enable the alternating
movement to be made smoothly.
The disengaging gear Figure 5 is fitted at the back of the carriage and consists
of a sliding bar M fitted on bearing brackets M₁ fixed on brackets. Upon this
slide bar is fitted by set screws two long collars m, m, with projecting rim having
mounted upon each a sliding collar m', m³ acting upon a small spiral spring m² m²,
placed between the rims and the fixed collars m² m². These collars can be adjusted
to any part upon the bar M according to the stroke desired, or size of glass to be
bevilled. At a convenient place upon the carriage at the back are fixed two forks
to engage to and fro with the spring collars m' m' which will first compress the
spiral spring till the spring is so compressed as to slide the bar M carrying with its
movements the link n which will rock the bent lever O and slide the sliding bar n
and belts through the link n' changing the course of the pinion R' and producing a
return stroke and so on.
The turning or manipulating of the sides of the glass A to be presented to the
grinder or the alteration of the parallelism of the bevil and also the locking of the
chuck when the position of the glass is determined so as to avoid any twisting or
torsional strain is obtained by the means of a worm screw h fitted between bearing
fitted on rocking head B and engaging with parts of a worm wheel ' formed at the
back of the chuck C. The worm screw is locked by set screw h³ Fig. 2. The
worm screw is worked by hand through wheel ³ fitted on the worm screw so as to
project beyond the carriage Fig. 1.
The grinders G whether stone or wood is mounted vertical and fitted upon a
horizontal shaft centrally to the machine which is supported upon two standards or
brackets K, K. The grinder G is made to press upon the glass until the desired
bevil or effect is produced by a pressure weight N and lever N¹ which press the
shaft and grinder G towards the glass A and is controlled by set screws fitted at
the other end of the shaft and adjusted so as to allow the forward movement of the
grinder to be just what is necessary. Set collars g', g' will accomplish the same
result.
The machine is worked as follows:-
A glass A is fitted on the chuck C by suction by opening a twoway cock
connecting the exhauster and groove upon the face of the chuck and is placed
on the connecting pipe x. The dished washer is fixed by clamp screw T₁ the
angle of the bevil is adjusted either by oscillating, either way, the oscillating
frame E, E, E E¹ by turning worm V' and worm wheel V' which advances the
way required, the screws V, V, according to the angle required upon the edge of
the glass; when the machine has no oscillating frame, I obtain the same effect
by adjusting the levers P1, P¹ which are fixed on pivots P, P, of the rocking
arm and the depth of the bevil adjusted by set screw P. The spring P' keeps
the glass constant against grinder at the same time gives to the rocking frame
a great sensitiveness which is very essential to bevel brittle material like glass.
When this is done the attendant sets the pressure weight n and set screws g
and adjusts the sliding collars m m on shifting bar M to suit the stroke, then
he starts the machine by pulling the belt bar n' Fig. 5 which moves the belts
from their loose pulleys and the carriage begins to move in one direction until
one of the forks placed on one side of the carriage meet, the spring collar m
which will move the belts through the links n, n', and bell levers and bar n'
to move in opposite direction but in the time of the shifting of the belts the
carriage will by its own acquired velocity continue slowly to move in the same
direction until the rack which has gained a certain freedom has been so far

page_text: advanced in the opposite direction to compress the spiral spring at opposite end
until its compression is strong enough to carry the carriage in the opposite
direction, this action is repeated at every change of direction of movement. At
the same time the attendant looks if the bevil is ground parallel if not he turns
the chuck by the means of the worm screw and worm wheel h¹ to the side
of the smallest side of bevil giving more surface glass to the mill on this side.
This is very essential as glass is very irregular in thickness and also nearly
impossible to fit the glass absolutely square on the chuck. When this is obtained
the maching is left bevilling one side of the glass until the grinder G has advanced
the distance allowed by set screw g or by the other way until the lever P¹ has met
the set screw P' then the glass is turned to the next side by the worm screw h and
worm wheel and the same operation is repeated for every side of the glass.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is --
1st. In glass bevilling machines the carriage Z mounted with the vertical
wheels H, H, H, H, running upon horizontal rails LL. The rack R with spring,
oscillating frame E, E E' E' with pillar screws EE and pivotting at 9 carrying
bearing brackets ee worked by worm f, f' substantially as herein set forth.
2nd. In glass bevilling machines the carriage Z with rising screw pillars E, E
and bracket bearings e e carrying rocking head B, B, between the pivots PP,
substantially as herein set forth.
3rd. In glass bevilling machines the screw pillars E, E, brackets e, e, and
rocking head B, B, with chuck C, clamp bar T, arm t screw T' dished washer t
locking lever J pipe and exhauster X substantially as herein set forth.
I
4th. In glass bevilling machines the method of rising the rocking head B, B,
by means of water pressure plungers D carrying brackets bearing e through hollow
pillars E E and valves d d' substantially as herein set forth.
5th. In glass bevilling machines the method of adjusting the glass A to the
grinder G to produce a true bevil on the edge of glass by means of turning the
chuck C through the worm parts of worm and set screw substantially as set
forth.
6th. In glass bevilling machines the method of obtaining the angle of the bevil
on the edge of the glass by means of a rocking frame or head B B, lever P' set
screw P spring ps in combination with grinder G controlled by pressure weights N
and set screw g substantially as set forth.
7th. In glass bevilling machines the method of roughing, or smoothing or
polishing the four sides of glass from small sheets say such as 9 ft. super. to large
sheets such as 56 ft. super. and more without taking the sheet of glass from its
chuck C while doing one of these operations substantially as herein set forth and
shewn upon the drawings.
Dated this 1st day of January 1891
GEORGE BARKER,
77, Colmore Row, Birmingham, Agent for Applicant.