Improvements in and relating to Machines for Grinding and Polishing the Surfaces of Plate Glass, Marble, Stone Slabs, and the like.
Year: 1897

page_text: Date of Application, 16th Mar., 1897-Accepted, 17th Apr., 1897
COMPLETE SPECIFICATION.
Improvements in and relating to Machines for Grinding and
Polishing the Surfaces of Plate Glass, Marble, Stone Slabs, and
the like.
I, PHILLIP SEMMER, of 43 Sixth Avenue, Pittsburgh, Alleghany County,
State of Pennsylvania, United States of America, do hereby declare the nature of
this invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:-
My invention has relation to machines for grinding and polishing the surfaces
of plate glass, marble, stone slabs, etc., and it consists in the novel construction and
arrangement of its parts as hereinafter described.
In the accompanying drawings ;-
Figure 1, is a side view of the machine partly in section.
Figure 2 is a side view partly in section of the device for varying the motion of
the cylinders of the machine.
Figure 3 is a longitudinal sectional view of one of the cylinders.
Figure 4 is a longitudinal sectional view of one of the cylinders showing the
grinding disks in position.
Figure 5 is a transverse sectional view of one of the cylinders showing the
grinding disks in position between the plates, and also showing an edge view of
the disks 6, 6.
Figure 6 is an elevation partly in section of a modified form of the cylinder.
Figure 7 is a longitudinal sectional view of a modified form of the cushion used
in the cylinder.
Figure 8 is an end elevation partly in section of a modified form of the
invention.
The invention consists of the cylinders 1, 1, which are substantially the counter-
part of each other. Said cylinders are perpendicularly attached to the shaft 2;
said shaft is journaled in the frame 3, said shaft being provided with a pulley
wheel around which the belt 4 passes. Each cylinder is provided with a
perpendicular permanent side 5, to the inner face of which is fixed the disk 6, as
shown in Fig. 1. The inner face of the disk 6 is provided around its periphery
with a flange 7, which retains a plate 8, or a grinding disk.
In the form of the invention as shown in Fig. 1, the opposite end of the cylinder
is provided with a removable side 9, said side being secured in place by suitable
turnscrews 10. The packing 11, being interposed between the end of the cylinder
and the side 9. The side 9, is provided in its center with a collar 12, said collar
having an internal thread in its central perforation. A horizontal support 13,
passes through said collar. The outer surface of said support is provided with a
thread, which engages the thread in the collar. The inner end of said support is
provided with a disk and plate similar to the disk 6, and plate 8. The outer end
of said support is provided with a swiveled joint 14, to which is connected the pipe
or hose 15. A wheel 16, is also located on the outer part of said support; said
wheel in its center is provided with an internal thread adapted to engage the
thread on the support; the inner side of the said wheel is adapted to bear against
the outer side of the collar 12 and thereby hold the support 13, firmly in its proper
position. The passage in the support 13, connects with the radially extending

page_text: outlets 17, 17. Through the said hollow and the said outlets 17, 17, a jet of water
may be introduced into the cylinder 1, while the same is closed and in motion.
The cylinder is provided with a suitable draw-off cock 21, through which the
water may be withdrawn at pleasure. The ends of the shaft 2, may be connected
to the cylinder in any suitable manner. However, in order to give the cylinders
an irregular or throwing motion I connect them as follows:
The ends of the shaft are provided with a disk 22, each of said disks is located in
a receptacle 23, which in turn is secured to the side 5, of the cylinder. The said
receptacle 23, is circular in shape, and is provided around its inner periphery with
a rubber cushion 24 (see Fig. 2).
The oppositely arranged shoes 25, 25, are located in the sides of the receptacle 24 ;
said shoes are provided with the rubber cushions 26, 26, which are adapted to come
in contact with the periphery of the disk 22. To the back of each shoe 25, is
swiveled a threaded rod 27, said rod passes through threaded bearings 28, and the
outer ends of said rods are provided with suitable handles. As the shoes 25, 25, are
moved back or forth by means of the screw-rods, the cylinder 5, is shifted to one
side or the other, and if the center of the cylinder is shifted to one side of the
center of the shaft 2, as the said shaft is revolved, the cylinder will have a throwing
or eccentric motion, which will cause the contents of the cylinder to vigorously pass
around the inner periphery.
I do not wish to confine myself to this specific construction for giving the
cylinder the eccentric motion, as any suitable means accomplishing this result may
be applied. Such a motion in a measure may be imparted to the cylinder by
withdrawing the shoes 25, 25, until their inner sides, together with the inner sides
of the receptacle 23, form a circle. Then the disk 22, will engage and bear against
the cushion 24, and the cushions 26, 26, and as the shaft 2, is revolved the weight
of the cylinder and its contents will create sufficient friction between the disk and
the said cushion to make the cylinder have an irregular revolving motion.
In the modified form as shown in Figs. 6 and 8, the device for giving the
cylinders the irregular revolving motion is dispensed with, and the cylinders 1, 1,
are attached directly to the shaft 2; said cylinders being shrunk in position on the
shaft. The inner faces of the cylinders are provided with the radially extending
braces 30 and the cylinders rest on the revolving pulleys 31 and 32, the said pulleys
carrying the entire weight of the cylinders and their contents. The disk 33, is
attached directly to the inner end of shaft 2, while the disk 34, is attached directly
to the inner end of the arm 35; said arm at its outer end is provided with a
tbread 36, and said arm passes through the bearing or support 37. A collar 38, is
fixed on said arm, and the spring 39, is interposed between said collar and the end
of the bearing 37. The wheel 40 is provided in its center with an internally
threaded perforation, which engages the thread 36, on the said shaft 35. The
inner side of said wheel is adapted to engage the end of the bearing 37, and by
revolving said wheel the position of the disk 34, may be varied. The bearing 37,
is provided with a set screw 41, the lower end of which is adapted to engage the
shaft 35, and hold the said shaft in any desired position.
In the form of the invention as shown in Figs. 6 and 8, the side 42 is made
permanent with the remainder. The cylinder and said side is provided with a
central perforation 43, said perforation being of sufficient size to permit the ingress
and egress of the disk 34.
In the form of the invention as shown in Figs. 1, 3, 4, and 5, the inner periphery
of the cylinder is provided with a continuous cushion 18, said cushion is made of
rubber or any other suitable material; said cushion is connected preferably by
cement to the cylinder at intervals, and between these intervals the cushion extends
toward the center of the cylinder. Thus making a complete cushion and adding
greatly to the elasticity of the material.
The plates 19, 19, are arranged in perpendicular positions between the disks 6, 6,
and between the said plates. The grinding disks 20 may be placed as shown in
Figs. 4 and 5, or the said plates may be arranged against each other as shown in

page_text: Fig. 1. Said grinding disks are provided with rough surfaces as indicated
in Fig. 4.
In the form of the invention as shown in Figs. 6 and 8, the cushion or rubber
belt 18, is not connected directly to the inner periphery of the cylinder, but the
short cylindrical sections 44, made preferably of rubber pipe or hose are interposed
between the said cushion or belt 18, and the inner periphery of the cylinder. Thus
a continuous pathway is formed around the inner periphery of the cylinder, as
indicated in Fig. 6. Fig. 7 being a detailed enlarged view of a short section of
the cushion as used in Fig. 6.
In the form of the invention as shown in Figs. 6 and 8, the cylinders are provided
in their interior and on each side of the cushion 18, with a series of buckets, 45, 45,
the object of which will be hereinafter explained. As the cylinders are revolved
the plates 19, 19, rub against each other and a suitable abrasive material is placed
in the cylinders.
With the invention as shown in Fig. 1, a jet of water is let into the cylinders
through the hollow support 13.
With the invention as shown in Figs. 6 and 8, the water is passed into the
cylinders at the same time that the plates 19, are; the water assuming about the
height as indicated by the dotted line 46, in Fig. 6. This liquid takes up
the abrasive and carries it between the plates. Thus a surface is put on the
plates.
In the invention as shown in Fig. 1, the water may be withdrawn from the
cylinder through the cock 21, and also any débris that is removed from the surface
of the plates may be withdrawn through the said cock.
If it is desirable to use the grinding disks 20, they may be interposed between
the plates as shown in Fig. 5. The peculiar arrangement of the elastic cushion 18,
prevents the plates 19, 19, from breaking or chipping at the edges.
The object of the buckets 45, 45, as shown in Figs. 6, and 8, is to elevate the
water and abrasive in the lower part of the cylinder, and to deposit the same on
the upper edges of the plates 19, 19, as indicated by the arrows in the said figures.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:
1. A machine for grinding and polishing plane sheets of glass and other plane
surfaces, consisting of a horizontal cylinder adapted to receive the glass, the glass
resting on edge in the cylinder, and a cushion located in said cylinder, said cylinder
having a revolving motion.
2. A machine for grinding and polishing plane sheets of glass and other plane
surfaces, consisting of a cylinder adapted to receive the glass and a cushion located
in said cylinder, said cushion being secured to the cylinder at intervals and between
the intervals extending toward the center of the cylinder.
3. A machine for grinding and polishing plane sheets of glass and other plane
surfaces, consisting of a horizontal cylinder adapted to receive the glass and
perpendicularly arranged grinding disks located in said cylinder, said cylinder
having a revolving motion.
4. A machine for grinding and polishing plane sheets of glass and other plane
surfaces, consisting of a horizontal cylinder adapted to receive the glass, the glass
being adapted to rest on edge in the cylinder, and a removable side closing one end
of the cylinder, and perpendicularly arranged grinding disks located in said cylinder,
said cylinder having a revolving motion.
5. A machine for grinding and polishing plane sheets of glass and other plane
surfaces, consisting of a horizontal cylinder adapted to receive the glass, the glass
resting on edge in the cylinder, a perpendicular grinding disk permanently secured
to one end of the cylinder and a grinding disk perpendicularly arranged and
adjustably secured to the opposite end of the cylinder, said cylinder having a
revolving motion.

page_text: 6. A machine for grinding and polishing plane sheets of glass and other plane
surfaces, consisting of a cylinder adapted to receive the glass, and a laterally
adjustable grinding disk secured to one side of the cylinder, said cylinder having a
revolving motion.
7. A machine for grinding and polishing plane sheets of glass and other plane
surfaces, consisting of a cylinder adapted to receive the glass and a laterally
adjustable grinding disk secured to one side of the cylinder, and a device for
retaining said disk in any desired position, said cylinder having a revolving motion.
8. A machine for grinding and polishing plane sheets of glass and other plane
surfaces, consisting of a horizontal cylinder adapted to receive the glass, the glass
resting on edge in the cylinder and a cushion in said cylinder, said cushion consisting
of an elastic belt, elastic sections transversely arranged and interposed between
said belt and the cylinder, said cylinder having a revolving motion.
9. A machine for grinding and polishing plane sheets of glass and other plane
surfaces, consisting of a horizontal cylinder adapted to receive the glass, the glass
resting on edge in the cylinder, said cylinder adapted to receive a suitable liquid
and abrasive, buckets located within said cylinder and adapted to elevate the liquid
and abrasive, and deposit the same on the upper edge of the glass, said cylinder
having a revolving motion.
10. A machine for grinding and polishing plane sheets of glass and other plane
surfaces, consisting of a horizontal cylinder adapted to receive the glass, the glass
resting on edge in the cylinder, a cushion located within the cylinder, buckets
located within the cylinder on each side of said cushion, said cylinder adapted to
hold a liquid and an abrasive, said buckets adapted to elevate the liquid and an
abrasive, and deposit the same on the upper edge of the glass, said cylinder having
a revolving motion.
11. A machine for grinding and polishing plane sheets of glass and other plane
surfaces, consisting of a horizontal cylinder adapted to receive the glass, the glass
resting on edge in the cylinder, said cylinder having an opening in one end, an armı
protruding through said opening and a disk secured to the inner end of said arm,
said cylinder having a revolving motion.
12. A machine for grinding and polishing plane sheets of glass and other plane
surfaces, consisting of a horizontal cylinder adapted to receive the glass, the glass
resting on edge in the cylinder, said cylinder having at one end an opening, a
shifting arm protruding through said opening, a suitable device adapted to shift
said arm and retain it in a desired position, a disk secured to the inner end of said
arm, said cylinder having a revolving motion.
13. A machine for grinding and polishing plane sheets of glass and other plane
surfaces, consisting of a horizontal cylinder adapted to receive the glass, the glass
resting on edge in the cylinder, pulleys arranged under said cylinder, said cylinder,
resting on said pulleys, said cylinder having a revolving motion.
Dated this 16th day of March 1897.
CHARLES JUNGE,
Agent for Applicant.