Improvements in or relating to Machinery for Bevelling Glass and the like.
Year: 1899

page_text: Date of Application, 30th Aug., 1899
Complete Specification Left, 17th Apr., 1900-Accepted, 16th June, 1900
application, on Aug., 7899
Complete Specification Left, 17th Apr., 1900-Accepted, 16th June, 1900
PROVISIONAL SPECIFICATION.
Improvements in or relating to Machinery for Bevelling Glass and
the like.
A communication from the Firm of J. MIESSE & COMPANY, of 34, Rue des
Goujons, Brussels, Belgium, Constructing Engineers.
I, ALFRED JULIUS BOULT, of 111, Hatton Garden, in the County of Middlesex,
Chartered Patent Agent, do hereby declare the nature of this invention to be
as follows:-
This invention relates to improvements in machinery for bevelling glass and
the like its object being the provision of machinery whereby such operations
are performed much more simply and quickly owing chiefly to the fact that
the trouble of holding, transferring and mounting the glass during the process
of bevelling is reduced to a minimum the glass remaining fixed on one single
carriage during all the different stages of the operation.
Glass-bevelling machines according to this invention have only one glass-
holding carriage, the glass being operated upon in both the rough bevelling and
the finishing processes by the one worker and without changing the carriage.
The improved machines are double bevelling machines, the two bevelling discs
being mounted on the ends of the same shaft, and so arranged that they can
be brought successively to attack the glass by means of a rotation of the frame
work supporting the shaft, through angle of 180°. The frame work-
which forms a carriage-in a direction perpendicular to that in which
the carriage supporting the glass is displacable, and it can move forward
and backward as may be required in bevelling the glass. In order to be able
to obtain the rotation of the frame work carrying the grinding discs, without
having to displace the driving belt we have provided with machine with a device
which while keeping the belt in a condition of tension allows for differences
in the length of the belt such as occur for instance when it is sometimes straight
and sometime crossed, and this device forms an integral part of this invention.
The contrivance which is employed for this purpose works automatically and
by means of counter-weight levers raises the bearings of the transinission shaft,
this being done more or less according to whether the belt is straight or crossed.
The following is a description by way of example only of one form of bevelling
machine according to this invention.
Upon a cast socket of convenient height and shape is mounted, on slides, a
carriage which can be displaced by means of a screw, or rather a shaft with
screw action, actuated by a fly wheel provided with a handle and working a
conical gear. This screw shaft moves in a nut which it traverses, the said nut
forming the lower extension of the carriage, by which means the carriage is
moved forward or backward according to the direction in which the shaft is
turned. In the centre of the carriage is arranged a support mounted on a pivot
and provided with two arms having bearings in which revolves a shaft which

page_text: the trouble of holding, transferring and mounting the glass during the process
of bevelling is reduced to a minimum the glass remaining fixed on one single
carriage during all the different stages of the operation.
Glass-bevelling machine according to this invention have only one glass-
holding carriage, the glass being operated upon in both the rough bevelling and
the finishing processes by the one worker and without changing the carriage.
The improved machines are double bevelling machines, the two bevelling discs
being mounted on the ends of the sanie shaft, and so arranged that they can
be brought successively to attack the glass by means of a rotation of the frame
work supporting the shaft through an angle of 180°. The frame-work-which
forms a carriage can also be displaced in a direction perpendicular to that in
which the carriage supporting the glass is displaceable, and it can move forward
and backward as may be required in bevelling the glass. In order to be able
to obtain the rotation of the frame work carrving the grinding discs without
having to displace the driving belt, the machine is provided with a device
which while keeping the belt in a condition of tension allows for differences
in the length of the belt such as occur for instance, when it is sometimes straight
and sometimes crossed, and this device forms an integral part of this invention.
The contrivance which is employed for this purpose works automatically and
by means of counter-weight levers raises the bearings of the transmission shaft,
this being done more or less according to whether the belt is straight or crossed.
The following is a description by way of example only of one form of bevell-
ing machine according to this invention.
Figure 1 is a longitudinal elevation of the whole machine.
Figure 2 is a lateral elevation of the same.
Figures 3 and 4 represent a lateral elevation and a front elevation of the
bearing carriage forming the tension device of the driving belt.
Upon a cast socket or base S of convenient height and shape is mounted,
on slides, a carriage C which can be displaced by means of a screw, or rather
a shaft with screw action actuated by a hand wheel provided with a handle and
working a conical gear K. This screw shaft 1 moves in a nut or block E which
it traverses, the said block forming the lower extension of the carriage C, by
which means the carriage is moved forward or backward according to the direc-
tion in which the shaft is turned. In the centre of the carriage is arranged a
support mounted on a pivot and provided with two arms F having bearings P
in which revolves a shaft A which carries the grinding discs N. In the centre of
this shaft is keyed a driving pulley R. The grinder carrying frame can turn
on the carriage but is rendered stationary when desired by means of a screw
provided with a hand wheel L. The shaft A of the grinding discs is provided
at each end with a plate O on the outside of which are concentrically mounted
the grinding discs N of which one is of cast metal while the other is of stone,
one serving for the rought cutting of the bevel, and the other for the finishing
operation. It will be easily understood that when one phase of the operation
is terminated, having made use of one of the grinding discs, it will be sufficient
to unscrew the clamping screw and to turn the pivotting frame support through
an angle of 180° to bring the second disc into position to continue the bevelling
of the glass, without any necessity for displacing the glass under operation,
the same remaining fixed in the transport carriage used for that purpose. The
glass is attacked at the side by the bevelling discs the operation being made
possible by inclining the carriage on which the glass is mounted, a correspond-
ing displacement of the carriage carrying the grinding discs being made.
Of course it is quite possible that instead of having the grinding discs mounted
on the same shaft, they may be mounted on two separate shafts arranged in
line with each other, and each provided with a separate driving pulley. This
modification may be made without departing from the spirit of this invention.
In a similar way the plates O may be provided with any other suitable devices