IMPROVEMENTS IN APPARATUS FOR GRINDING, POLISHING OR FACETTING GLASS AND OTHER MATERIALS
Year: 1885

page_text: MARNE MENS W
I ALFRED JULIUS BOULT of 323 High Holborn, in the county of Middlesex
Engineer do hereby declare the nature of this invention for " IMPROVEMENTS IN
APPARATUS FOR GRINDING, POLISHING OR FACETTING GLASS AND OTHER MATERIALS"
(a communication from Julius Richard Bock of Markt Redwitz, Bavaria Engineer)
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :—
The machine shown in the annexed drawings unites several work tables D
mounted on slides or carriages B which connect the same, upon these tables are
placed the plates or articles to be operated upon, and, if required they are attached
by means of a suitable adhesive.
These plates or articles are operated upon by Cylinders W. W. which may as
required for be made of Metal stone, stone (covered with felt) or any suitable
substance; these rollers are horizontally mounted over the tables D in bearings L
capable of being raised or lowered in their standards or supports S by simple
helical gear, so as to be adaptable to different heights.
Upon the bearings L of each roller a trough shaped vessel N is supported by
means of two set screws E and this vessel serves to receive the requisite polishing
or grinding material such as water sand, rouge &c: in the bottom of said vessel
vertically above the axis of the roller there are a number of circular apertures, t.
closed by ball-valves u when the distance between the vessel N and the roller W
oxceeds certain limits.
If this distance is reduced the balls u touch the roller and rise more or less from
their seats, thus, allowing the grinding or polishing medium to flow down upon the
roller whilst the balls themselves are rotated by contact with the roller, whereby
all possibility of clogging is obviated and the balls are permanently maintained in
a suitable condition for closing the apertures.

page_text: As the glass or stone plates have in most cases to pass through operations of
various grades of fineness it will be convenient to give the machine a circular form
and to fit it with various rollers whereof one may serve as a rough or first grinding
roller, the second say as a medium roller the third as a finishing or polishing roller;
the rollers will of course have to be constructed accordingly and to be provided
with, say sand or polishing Powder as the case may be.
On the bed or framing A of the machine four carriages B may be conveniently
mounted and coupled at equal distances, whilst the three rollers W with their
troughs N will be so situated that three of the tables D carried by the slides may
be in position under the rollers whilst a fresh piece to be operated upon is placed
upon the fourth table, or a finished piece removed therefrom.
Figures 1 and 2 of the accompanying drawings shew such an arrangement in
these figures I. II III IV shew the tables and their connection with the carriages
in their position when at work IV being the table which is free at that time.
When the work has been brought into suitable position by mechanism such as
hereinafter more fully described it is operated upon by the rollers being caused to
rotate, the rollers may at the same time be reciprocated axially by a continuously
acting mechanism whilst the slides or carriages may be moved either in a slowly
& continuously in one direction or may be moved to and fro in a direction
perpendicular to the axis of the rollers suitable guides being provided for the
purpose so that the work may continually be operated upon in two directions
which are perpendicular to one another so that perfectly true surfaces may be
obtained,
The said different motions are obtained off a suitable shaft and transmitted by
belt gearing as follows.
The rotary motion of the shafts W is effected by cone pulleys M M keyed upon
the spindleheads H which are connected by the roller axes by a spring and feather
and for the purpose of maintaining the requisite tightness of the belts at whatever
height suitable devices say guide pulleys may be used.
To produce the axial reciprocating motion the roller spindles have a return tread
at one end which may be cut directly on the spindle as shewn on an enlarged scale
in figures 3 and 3ª and engages with the corresponding pin X which is by a set
screw attached to the bracket on the upright S.
The movement of the slides or carriages on the circular machine frame or lead it
is effected by transmitting the rotation of the cone pulleys f to toothed gearing
consisting of the toothed ring i movably provided on the bed a and the toothed
pinion / on the cone pulley together with the toothed ring o on the framing and
parts connected with the coupling c c and the leaver m.
The toothed ring i has for its object to transmit motion to the gearing last
referred to and is provided not only with the plane teeth as shewn in figures 1. 2. 4
and 5 but also a set of helical teeth at its periphery by means whereof it is
connected with the helical wheel K of the coupling cc the rotation whereof is
transmitted by the helical wheel mounted on lever m to a disc with helical
teeth (1) this disc when in the position shewn in figure 1 gears with the toothed
ring o in the bed and thus imparts a very slow motion to the slides B. united by
the couplings co.
If lever m is placed into the position shewn in figure 5 the slides are stopped
unless they are rigidly connected with the rotating ring i compare figure 5. In the
latter case the slides move with the same velocity as the toothed ring and this
movement serves for rapidly transferring the work say from one set of rollers to the
other.
Referring to what has already been said about the adjustability of the cylinders
or rollers W. and about the troughs or vessels N. supported on the bearings L L.
The following may be added, see figure 1 and figure 6.
The bearings L L are each supported on a screw spindle a screwed into a nut b
provided in the standard S and having a helical wheel. The rotation of these
moves the bearing.

page_text: The rotation of the nut band. of the helical wheel connected therewith is effected
by means of a screw shaft b' having a handle b² so that the two nuts belonging to
the same roller may be turned simultaneously and to the same extent and with the
roller also the vessel N.
The adjustability of the latter with regard to the roller needs no further
description and will be readily understood from figures 1 and 6.
The tables D mounted on the slides B will for the purpose of bringing the work
thereon into exactly the required position not only require to be adjustable but
will also require to be inclined to the horizontal to some extent. To this end the
tables have near to one edge a spindle p¹ carried on two vertical screw spindles
mounted in the slide (see figures 1 and 8) In consequence of this arrangement the
screwspindle having a handwheel u will by means of the helical wheels g
(firmly connected with the nuts of the screws 2) enable the table to be readily
raised or lowered. The tables have moreover transverse pieces g¹ which form outs
for the screw spindles g Helical wheels v keyed on the latter are worked by
means of a hand wheel Z engaging with screwspindle y this latter is mounted in
eyes" of the levers g mounted on an axle w having its bearings in the slide so
that when the screw spindle y is turned the position of the transverse piece g¹ is
changed and the friction between the transverse piece and the table will also alter
the leverage.
"
Having now particularly described and ascertained the nature of the said
Invention and in what manner the same is to be performed as .communicated to
me by my foreign Correspondent I declare that what I claim is
1. The method of grinding polishing or facetting plates of Glass or Stone and the
like by means of rollers W W of any suitable material (which may be supplied
with suitable polishing material such as Sand Emery, Rouge or with water or the
like by trough shaped vessels N having apertures which are closed by ball valves)
the articles to be polished being carried on moving slides or carriages -all
substantially as described and illustrated in the Drawings.
2. In apparatus for grinding polishing or cutting Glass, Stone or other materials.
(a) The arrangement shown in Figs. 1. 3 and 6 for supporting the journals of the
rollers enabling the latter to be readily adjusted as to height and also to be moved
axially giving their rotation, substantially as described.
(b) The vessel N fitted over the roller W in such a manner as to make their
distance adjustable and to allow the supply to the roller to be regulated.
(c) The combination of four tables D carrying the work with four slides B the
latter being coupled with one another and moving on suitable guides) the Tables
being so connected with the slides as to be adjustable substantially as specified.
(d) The gearing allowing the four coupled slides to be moved on the bed either
slowly for operating on the work or quickly for shifting the work from one roller
to the other all substantially as described & illustrated in the drawings.
(e) The combination with one another of the features indicated in the headings a
to d of this Claim.
L 1007