Improvements in Machinery or Apparatus for Grinding and Polishing Tubes, Bars, or other articles.
Year: 1891

page_text: Date of Application, 7th Nov., 1891
Complete Specification Left, 7th Sept., 1892--Accepted, 15th Oct., 1892
PROVISIONAL SPECIFICATION.
Improvements in Machinery or Apparatus for Grinding and Polishing
Tubes, Bars, or other articles.
We, RICHARD JOHN EDWARDS, and ARCHER EDWARDS, both of Charles
Street, Curtain Road, in the City of London, Manufacturers, do hereby declare
the nature of this invention to be as follows:-
Our present invention relates more especially to machinery for grinding off the
rough edge or projection left longitudinally upon the surface of what are known as
brass cased iron tubes, and for grinding and polishing such tubes or other tubes, or
bars of circular, square, or other section, or for grinding and polishing flat or other
surfaces generally.
Supposing that our invention is to be used for the purpose of grinding off the
rough edge or projection left longitudinally upon the surface of brass-cased tubes
of any diameter, we take two tables or supports arranged at a sufficient distance
apart (according to the length of the tubes to be treated), and upon one of these
supports we arrange a bearing or bearings in which revolves a transverse shaft
provided with fast and loose pullies or equivalent devices by which it can be set in
rapid revolution by steam or other power. Upon this shaft we fix a suitable pulley
round which an endless driving cord or band can be passed, such cord or band also
passing round a corresponding pulley revolving in the bearings in the support at
the other end of the apparatus. This last named support is made moveable for a
sufficient distance toward, or from the first named one, for the purpose of keeping
the cord or band sufficiently stretched. This we effect preferably by arranging
the bearings at one end of a vertical lever or frame the other end of which
turns upon a fixed axis, and its loose end carrying the bearings having attached
to it a cord or chain passing over a pulley and provided with a sufficiently
heavy weight. Any other equivalent means of keeping the cord or belt stretched
may however be used.
In a convenient position and extending for the whole or part of the distance
between the fixed and moveable supports, we arrange and fix a cylindrical tube or
bar upon which can turn freely and can also move freely longitudinally a socket
connected to a horizontal table or frame provided with bearings in which revolves
a transverse shaft carrying a pulley round which the endless cord or band already
described passes, the frame being also provided with a guide pulley at each side of
the pulley just described, so that the cord or band passes round a sufficient part of
the circumference of the former.
It is evident, therefore, that if the cord or band is set in rapid revolution the
transverse shaft upon the table is also made to revolve rapidly, whilst the table
carrying it can be moved longitudinally along the fixed tube or bar and can also be
turned upon the latter for a short distance without interfering with the revolution
of the shaft.
Upon the front end of the shaft is fixed a grinding device, consisting preferably
of a disc of sufficient thickness round the circumference of which is stretched and
fixed by any suitable means a strip of emery or glass cloth or paper or other
abrasive material of a fineness which may be varied as desired.
Between the circumference of the disc and the strip, of abrasive material we
provide a thickness of soft and yielding material, such as felt, so that the abrasive
material is allowed to yield or bend slightly in any direction.
In the front of the machine, below the edge of the grinding disc, we arrange a
longitudinal table or plate which carries the tubes to be ground. This table is
preferably hinged or pivotted at its inner edge to fixed supports so that -its outer
edge can be raised or lowered for the purpose of adjusting the tube or bar which is

page_text: to be ground to the exact height required, and under its outer edge we arrange one
or more adjustable supports upon which it rests when so adjusted. Upon its upper
surface we form or attach grooved or other supports on which the tubes or bars
themselves rest. A handle or lever is attached to the sliding carriage by which it
together with the grinding disc, can be moved longitudinally or lowered or raised
to and from the tube, and underneath the front edge of the carriage as near as
possible to the grinding disc we fix a stud or bar adjusted so that its lower end,
which is provided with a piece of soft material such as india rubber, rests upon
the tube and prevents the grinding, dise from pressing too heavily upon the
latter. The moveable table carries a weight or balance by which the grinding
disc is kept from falling upon the tube when the handle is released. This weight
may be pivotted or made to slide so as to ensure the table retaining the desired
position.
The action of the apparatus is as follows:-
A tube being arranged upon the supporting table, with the part which is to be
ground uppermost, and the grinding disc being set in rapid revolution by the
endless cord or belt, an attendant takes the handle and brings the disc gently
down upon the tube, at the same time moving the carriage and disc longitudinally
backward and forward, and turning the tube round in both directions if necessary.
The moveable table need not have a longitudinal movement of any great extent,
a part of the tube being first treated and it being then moved forward to bring
another part into position to be treated.
We preferably make the transverse shaft first described upon the moveable
table, capable of moving backward and forward longitudinally in its bearings for
a short distance, and we cause it when in action to move automatically slowly
backward and forward, by means of a cam or screw thread or equivalent device
actuated by toothed wheels driven by the shaft itself as it revolves, in the well
known way.
Where square tubes or bars or other flat surfaces are to be ground and polished, in
which it is desirable that longitudinal grinding marks should not be visible we make
the inner end of the horizontal shaft which carries the grinding or polishing disc,
moveable round a vertical pivot upon the moveable table, and we fix upon it a toothed
bevilled wheel which is driven by a corresponding toothed bevilled wheel turning upon
a vertical stud or pin fixed upon the top of the moveable table. The last named toothed
bevilled wheel is attached to and driven by a pulley round which the endless cord
or band passes, the guiding pullies from the latter being horizontal instead of
vertical as in the arrangement first described. The outer part of the horizontal
shaft is supported upon or in a guide, so that it can be turned round horizontally
for a sufficient distance, or can be fixed in any position. By this arrangement the
grinding marks upon the bar or other surface pass diagonally across the latter
instead of longitudinally along it.
In the first described apparatus the edge of the grinding disc may be cylindrical
or it may be of any other desired shape or contour, and metal tubes or bars,
regular in section or moulded to any desired shape, or wood or other materials of
different section may be treated, and india rubber or other sufficiently soft
polishing balls or blocks, instead of discs, may be used upon the revolving shaft,
which may be vertical, horizontal, or inclined as may be desired. The moveable
carriage may be made to travel automatically backward and forward instead of
being moved by hand as described. For this purpose we prefer to arrange one or
more endless chains passing round suitable wheels or pullies at the ends of the
machine, and made to travel uniformly at a slow speed by suitable gear driven by
the driving pulley of the machine.
The wheels round which the chain or chains pass may be arranged either
horizontally or vertically, and a moveable lever is strongly pivotted to the carriage
so that it can be made to engage either with the part of the chain which is moving
in one direction or with the part which is moving in the opposite direction, and the
carriage is accordingly made also to travel slowly in one or other direction. The

page_text: lever may be disengaged and reversed at the ends of the travel by hand, or it may
be operated automatically by a cam and a tumbling weight in the usual well known
way.
In order to withdraw the dust and particles set free in grinding and polishing,
we prefer to arrange a longitudinal box or pipe in the neighbourhood of the tube or
bar which is being ground, this box or pipe being connected with an exhausting
fan. We box in or enclose the grinding disc, except at the part which is iu
operation and we arrange close to such part the end of a tube or pipe of suitable
section which is carried by the carriage and enters a longitudinal slit in the air box
or pipe, the edges of the slit having one or more soft longitudinal strips between
which the tube passes, the remaining parts of the strips closing and keeping the
air box sufficiently air tight.
'
Or instead of this arrangement a flexible tube of sufficient length may be used
one end of which is connected with the short tube upon the carriage and the other
end with the exhausting fan, the length and flexibility of the tube allowing the
movement of the carriage backward and forward.
Instead of discs the edges of which are used for grinding, other suitable discs
may be used of which the flat surfaces may be used, or, instead of a disc upon the
grinding shaft, a pulley of suitable diameter, width, and shape, may be used, a
similar pulley being also arranged in bearings carried by an arm or bracket fixed
upon the moveable carriage, and an endless abrasive band or belt being passed
round both pullies and kept in rapid movement. The pulley last described may be
provided with means for adjusting its position so as to keep the band properly
stretched, and an adjustable wooden or other shaped block or guide of proper shape
and section may be arranged above that part of the endless abrasive band which
operates upon the wood or other material. below, which is being treated, the block
or guide being attached to and carried by the moveable carriage.
The details of our improved machine or apparatus may be varied more or less
according to the circumstance in which it is to be used and the purpose to which it
is to be applied, and by its use very great economy and efficiency are attained in
grinding and polishing tubes and bars, round, square, or of other sections, or other
surfaces of metal, wood or other material.
Dated his 1
Lo 1001
EDWARDS & Co.,
35, Southampton Buildings, London, Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Machinery or Apparatus for Grinding and Polishing
Tubes, Bars, or other articles.
We, RICHARD JOHN EDWARDS, and ARCHER EDWARDS, both of Charles
Street, Curtain Road, in the City of London, Manufacturers, 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 and
accompanying drawings, that is to say :-
Our present invention relates more especially to machinery for grinding off the
rough edge or projection left longitudinally upon the surface of what are known as
brass-cased iron tubes, and for grinding and polishing such tubes or other tubes, or
bars, of circular, square, or other section, or for grinding and polishing flat or other
surfaces generally.
Supposing that our invention is to be used for the purpose of grinding off the
rough edge or projection left longitudinally upon the surface of brass cased tubes
of any diameter, we use novel apparatus of the kind illustrated in the accom-
panying drawings in which :-
Figure 1 is a front view and Figure 2 a plan shewing the general arrangement of
the apparatus.

page_text: Figures 3 and 4 are cross sections.
Figures 5 and 6 detailed views of the tumbling lever.
Figure 7 a transverse section upon a larger scale of part of the machine.
Figure 8 a transverse section shewing the sliding retaining bolt.
Figures 9 and 10 a view upon a larger scale of the adjustable table.
Figure 11 an end view of the machine.
Figure 12 a front view of the grinding disc and case.
Figures 13 and 14 views upon a larger scale of the tumbling lever.
Figures 15 and 16, front view and plan of the adjustable spring cam.
'Figure 17 a front view shewing a modified form of the grinding apparatus.
Figure 18 a front, view of the entire machine upon a smaller scale.
Figures 19, 20, 21, 22, 23, views illustrating different modified forms of the
grinding devices.
In the figures a, a', are two tables or supports arranged at a sufficient distance
apart (according to the greatest length of tubes which are intended to be operated:
upon) and upon one of these supports a we arrange a bracket or bearing or
bearings b carrying a transverse shaft c upon which revolves a driving pulley e, or
fast and loose pullies or equivalent devices which can be set in rapid revolution by
steam or other power. Upon this shaft and attached to the driving pulley e we
arrange a suitable pulley round which an endless driving cord or band g can be
passed, such cord or band also passing round a corresponding pulley revolving
in or upon a bearing or bearings in the support or lever i at the other end of the
apparatus. This last named pulley is made moveable for a sufficient distance
toward or from the first named one f, for the purpose of keeping the cord or band
sufficiently stretched. This we effect preferably by arranging the pulley at one
end of a vertical lever or frame i the other end of which turns upon a fixed axis,
and the lever having attached to it a cord or chain passing over a pulley and
provided with a sufficiently heavy weight k. Any other equivalent means of
keeping the cord or belt stretched may however be used.
In a convenient position and extending for the whole or part of the distance
between the fixed and moveable supports, we arrange and fix a cylindrical tube or
bar upon which can turn freely and can also move freely longitudinally one or
more sockets m, m, connected to a horizontal table or frame n provided with
bearings o, o, in which revolves a transverse shaft p carrying a pulley ? round
which the enless cord or band g already described passes, the frame being also
provided with guide pullies,, at each side of the pulley r, so that the cord or
band
g passes round a sufficient part of the circumference of the former.
It is evident therefore that if the cord or band g is set in rapid revolution the
transverse shaft p is also made to revolve rapidly, whilst the table or frame n
carrying it can be moved longitudinally along the fixed tube or bar 1 and can also
be turned upon the latter for a short distance without interfering with the revolution
of the shaft.
Upon the front end of the shaft is fixed a grinding device, consisting preferably
of a discs of sufficient thickness round the circumference of which is stretched and
fixed by any suitable means a strip of emery or glass cloth or paper or other
abrasive material of a fineness which may be varied as desired.
Between the circumference of the disc and the strip of abrasive material we
sometimes provide a thickness of soft and yielding material, such as felt, so that the
abrasive material is allowed to yield or bend slightly in any direction. In the
front of the machine, below the edge of the grinding disc, we arrange a longitudinal
table or plate t (Figures 3, 4, 7, 9, 11, and 18) which carries the tubes to be
ground. This table is preferably carried upon brackets u hinged or pivotted to
"fixed supports so that the outer edge of the table t can be raised or lowered for the
purpose of adjusting the tube or bar which is to be ground to the exact height
required, and under its outer edge we arrange one or more adjustable supports upon
which it rests when so adjusted.

page_text: These
The method which we prefer for the purpose is shewn in Figures 8, 9, 10,
and 18. t is the longitudinal table or plate fixed upon hinged brackets u.
brackets can move for a sufficient distance endways upon the pin v on which they
turn and they are provided with inclined projections which rest upon corre-
sponding inclined fixed supports a carried by the frames of the machine. y Figure 10
is an adjustable screw carried by one end of the tablet and screwing through a
fixed nut z.
By turning the screw y the tablet can be moved in either direction longitudinally,
and as the projections w move along the support the table t is raised or lowered
upon its hinges v. In this way if a square bar or flat surface is being ground or
polished, its surface can be brought to a position exactly parallel with the grinding
disc. When the screw y is turned back, the table is brought back by a spring.
Upon the upper surface of the table t we form or attach grooved or other
supports on which the tubes or bars themselves rest. A handle or lever may be
attached to the sliding carriage n by which it together with the grinding disc s
can be moved longitudinally or lowered or raised to and from the tube, and
underneath the front edge of the carriage n as near as possible to the grinding
disc at one or both sides of the latter we fix a stud or bar (Figure 12) adjustable
so that its lower end which is provided with a roller 2, or a piece of soft material
such as india rubber, rests upon the tube and prevents the grinding discs from
pressing too heavily upon the latter. The moveable table n carries a weight or
balance of the kind hereinafter described (Figures 3 and 4) by which the grinding
disc is kept from falling upon the tube when the handle is released.
The action of the apparatus is as follows:-
A tube being arranged upon the supporting table with the part which is to be
ground uppermost, and the grinding discs being set in rapid revolution by the
endless cord or belt g, an attendant brings the discs gently down upon the tube, at
the same time moving the carriage n and discs longitudinally backward and
forward upon the bar, and turning the tube which is being ground round in both
directions if necessary by hand or automatically. If desired the moveable table or
carriage n need not have a longitudinal movement of any great extent, part of the
tube being first treated and it being then moved forward to bring another part into
position to be treated.
The moveable carriage may be made to travel automatically backward and
forward instead of being moved by hand as described. For this purpose we prefer
to arrange one or more endless chains passing round suitable wheels or pullies at
the ends of the machine, and made to travel uniformly at a slow speed by suitable
gear driven by the driving pulley of the machine.
This arrangement is illustrated in Figures 1, 2, 3, 4, 5, 6, 7, 8, 11, 13, 14, 15, 16,
and 18.
3, 4, 5, 6, are chain wheels round which the endless chains A, B, pass, the
wheels 3, 4, being driven at the proper speed by bevilled toothed wheels 7, 8,
driven in opposite directions by the corresponding toothed wheel 9 driven by a
vertical shaft 10, and a wheel and endless screw, driven by a band 12, from the
pulley 13.
A moveable lever 14 is strongly pivotted at 15 by an adjustable bracket 15* to
the carriage n so that it can be made to engage either with the chain A which is
moving in one direction or with the chain B which is moving in the opposite
direction (as illustrated in Figures 5 and 6) and the carriage n is accordingly made
also to travel slowly in one or the other direction.
The adjustable bracket 15* is made to slide in a guide on the table n, so that its
height can be adjusted. It is fixed in the desired position by a bolt 14*.
The lever 14 may be disengaged and reversed at the ends of the travel by hand, or
it may be operated automatically by a cam and a tumbling weight in the usual well
known way, as illustrated in Figures 13, 14, 15, and 16.
Instead of two endless chains A, and B, a single endless chain may be used
passing round two chain wheels upon vertical axes. The tumbling lever 14 may

page_text: be made to engage as desired with the part of the chain which is moving in one
direction or with that which is moving in the other direction.
16 is a flat central plate extending along the top of the machine, and having a
central slot 17. Longitudinal bars 18 extend from end to end and are fixed to the
plate 16, so that they form channels in which the chains 7 and 8 move along. The
point of the lower horizontal arms of the lever 14 engage with the links of one or
other of the chains, and in the central position of the lever in which it may be held
by a catch are free from both chains. 19 (Figure 13) is a horizontal tube fixed to
the upper end of the lever 14, and it contains a ball or other weight 20 which when
the lever is inclined to one side or the other passes to the corresponding end of the
tube and ensures the complete falling over of the lever to the proper position.
21 is a spring cam adjustable in any desired position in the slot 17, one such cam
being arranged at one end of the machine to engage with one horizontal arm of the
lever 14 and the other at the other end of the machine to engage with the other
horizontal arm of the lever. By this arrangement the movement backward and
forward of the table n and of the grinding discs is entirely automatic and the
length of travel can be varied to suit the length of the articles being ground.
In order to withdraw the dust and particles set free in grinding and polishing,
we prefer to arrange a longitudinal box or pipe 22 below or in the neighbourhood
of the tube or bar which is being ground, this box or pipe being connected with au
exhausting fan at 23 (Figure 18). We box in or enclose the grinding disc s, with
a case 24 (the upper part of which may be hinged) except at the part which is in
operation and we arrange close to such part the end of a tube or pipe 25 of suitable
section which is carried by the carriage n and enters a longitudinal slit 26, in the
air box or case 24 (as illustrated in Figures 3 and 4) the edges of the slit having
one or more soft longitudinal india rubber or other strips 27, 28, between which
the tube 25 passes, the remaining parts of the strips closing and keeping the air
box sufficiently air-tight.
Or instead of this arrangement a flexible tube of sufficient length may be used
one end of which is connected with the short tube 25 upon the carriage and the
other end with the exhausting fan, the length and flexibility of the tube allowing
the movement of the carriage backward and forward.
We preferably make the transverse shaft p first described upon the moveable
table, capable of moving backward and forward longitudinally in its bearings for a
short distance, and we cause it when in action to move automatically slowly
backward and forward, by means of a cam or screw thread or equivalent device
actuated by toothed wheels driven by the shaft itself as it revolves, in the well
known way. Or the outer end of the shaft p may have a concentric spindle 29
connected with but turning freely in it. This spindle is screwed and passes through
a fixed nut 30, and it has a handle 31 at its outer end by which the entire
carriage n and grinding device can be raised and lowered round the bar l, and at
the same time the latter can be traversed in and out to bring a fresh part of its
surface against the tube or bar which is being ground.
The outer or back end of the shaft p may be prolonged at p', and provided with
a ball or other weight p³ in which it turns freely, and p is a stop adjustable
upon p by the rod p and screw p. When the table n is raised, as shewn in
Figure 4, the weight p³ passes to the outer end of the shaft p', and prevents it
from falling down, but when the table is depressed whilst working the weight p³
moves forward against the stop p³.
ول
Where square tubes or bars or other flat surfaces are to be ground and polished,
in which it is desirable that longitudinal grinding marks should not be visible we
sometimes use the arrangement illustrated in Figure 19, in which the inner end of
the horizontal shaft p which carries the grinding or polishing disc is moveable
round a vertical pivot 32 upon the moveable table n, and we fix upon it a toothed
bevilled wheel 33 which is driven by a corresponding toothed bevilled wheel 34
turning upon the vertical stud or pin 32 fixed upon the top of the moveable table.
The last named bevilled toothed wheel is attached to and driven by a pulley r

page_text: round which the endless cord or band g passes, the guiding pullies from the
latter being horizontal instead of vertical as in the arrangement first described.
The outer part of the horizontal shaft is supported upon or in a guide 36, so that
it can be turned round horizontally for a sufficient distance, or can be fixed in any
position. By this arrangement the grinding marks upon the bar or other surface
pass diagonally across the latter instead of longitudinally along it.
The arrangement of the grinding devices may be further modified more or less.
For instance, as illustrated in Figure 21, instead of the driving cord, an endless
band g coated with emery or other abrasive material may be used, passing round
suitable pullies ², carried by the frame or table n, is a third pulley round
which the band also passes. The bar to be ground is indicated by dotted lines and
the moving abrasive belt is pressed against its surface between the pullies 1, 11²,
and the pulley³.
In Figure 22, a horizontal grinding discs is shewn substituted for the vertical
one already described, the disc being fixed upon a vertical spindle revolving in
bearings in a bracket carried by the table n and driven by a pulley ³ round which
the driving cord 9 passes.
I
In Figure 23 an abrasive band is indicated at 9 passing round the pullies,,
carried by the table and also round a pulley turning in horizontal bearings in
a bracket carried by the table n. The part of the abrasive band between the
pullies, and the pulley are pressed upon the work which is being operated
upon.
It is evident that other mere modifications of the arrangements described and
shewn may also be readily adopted, to suit different circumstances.
In the first described apparatus the edge of the grinding disc may be cylindrical
or it may be of any other desired shape or contour, and metal tubes or bars, regular
in section or moulded to any desired shape, or wood or other materials of different
section may be treated, and india rubber or other sufficiently soft polishing balls or
blocks, instead of discs, may be used upon the revolving shaft, which may be
vertical, horizontal, or inclined as may be desired.
Instead of discs the edges of which are used for grinding, other suitable discs
may be used of which the flat surfaces may be used, or, instead of a disc upon the
grinding shaft p a pulley 37 of suitable diameter, width, and shape may be used (as
illustrated in Figure 17) a similar pulley 38 being also arranged in bearings
carried by an arm or bracket 39 turning freely upon the shaft P, and an endless
The
band 40 being passed round both pullies and kept in rapid movement.
grinding discs is fixed upon the axle of the pulley 38, and can be raised or lowered
from the work which is being ground.
A balance weight may be fitted upon the other end of the arm or bracket 39,
which is shewn broken off.
Means may be provided for keeping the band 40 properly stretched. In another
modified form, illustrated in Figure 20, the shaft p carries a pulley 41, and the
carriage n has a bracket 42 which carries a stud or centre 43 upon which a similar
pulley 44 revolves, an endless abrasive band 45 passing round both pullies.
The stud or centre 43 is made adjustable so that the band 44 may be kept
properly stretched, and the lower moving surface of the latter operates upon the
bar or surface which is being ground.
An adjustable wooden or other block or guide 46 of proper shape and section may
be arranged above that part of the endless abrasive band 45 which operates upon
the metal, wood, or other material below, which is being operated upon, the block
or guide 46 being attached to and carried by the moveable carriage n.
In the different figures, 47 represents recesses in the frames, in which tubes or
bars can be conveniently placed before or after grinding. In Figure 8, 48 is a
bolt moveable in the slot 17 and passing through the carriage n, to prevent the
latter from rising too high when turned up on the bar l.
The details of our improved machine or apparatus may be varied more or less
according to the circumstances in which it is to be used and the purpose to which it

page_text: is to be applied, and by its use very great economy and efficiency are attained in
grinding and polishing tubes and bars, round, square, or of other sections, or other
surfaces of metal, wood, or other material.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare what that we
claim is :-
1. The general method of construction, and arrangement of apparatus, sub-
stantially as and for the purposes described and illustrated.
2. The combination of the frame, the fixed and moveable pullies f and h, the
endless cord or band 9, bar l, and moveable table or frame n carrying pullies r, r,,
axle p and grinding device 8, all arranged and operating substantially as described
and illustrated.
3. In combination with the apparatus described and claimed in Claim 2, the
chain wheels 3, 4, 5, 6, driven by gear such as 7, 8, 9, 10, 11, 12, and 13, endless
chains A, B, and devices for connecting the chains to the moveable table or frame n,
substantially as described and illustrated.
4. In substitution for the chain wheels and chains described in Claim 3, two
chain wheels carrying a single endless chain, and devices for connecting the
moveable frame or table n to either side of such endless chain, substantially as
described.
5. The device consisting of the tumbling lever 14, carried by the moveable table
or frame and engaging with the endless chain or chains, and the adjustable
reversing cams 21, substantially as and for the purpose described and illustrated.
6. In combination with the pivotted tumbling lever 14, the adjustable bracket
which carries it and is attached to the moveable table or frame n substantially as
described and illustrated.
.7. In combination with the spindle p which carries the grinding device, the
sliding weight and adjustable stop p³, substantially as and for the purpose
described and illustrated.
8. The adjustable and sliding bolt 48 for limiting the rise of the table or frame n,
substantially as described and illustrated in Figure 8.
9. In combination with the spindle p and grinding device s, the screwed spindle 29,
nut 30, and handle 31, substantially as and for the purposes described and
illustrated.
10. The combination with the grinding devices carried by the movable table or
frame n, of the box or pipe 22, tube 25, slit 26, flexible strips 27 and 28, case 24,
and air exhausting apparatus, substantially as and for the purpose described and
illustrated.
11. The method of and appliances for adjusting the position of the table t,
consisting of the brackets u, pins V, projections to, inclined supports a and adjustable
screw y, substantially as described and illustrated.
12. The device for supporting part of the weight of the grinding device,
consisting of the adjustable support 1, 2, carried by the moveable table or frame n
and resting upon the tube or bar which is being ground, substantially as described
and illustrated in Figure 12.
13. The modified arrangement of apparatus illustrated in Figure 17, consisting
of the pivotted arm or bracket 39, pullies 37 and 38, endless band 40, and grinding
device, substantially as described.
14. The modified arrangement of apparatus illustrated in Figure 19, consisting
of the horizontal spindle p carrying the grinding device s and moveable round the
pivot 32 upon the moveable table or frame n, the bevilled toothed wheels 33, 34,
pullies r, r,, round which the endless cord passes, and the guide 36, all arranged
and operating substantially in the manner and for the purpose described.
15. The modified arrangement of apparatus illustrated in Figure 20 consisting of
the pullies 41, 44, adjustable bracket 42, stud 43, and endless abrasive band 45 and
support 46, substantially as and for the purpose described.

page_text: 16. The modified arrangement of apparatus illustrated in Figure 21, consisting
of the endless abrasive band g instead of a cord, passing round pullies r,,,
carried by the moveable frame or table n, substantially as and for the purpose
described.
17. The modified arrangement of apparatus illustrated in Figure 22, consisting
of a horizontal grinding device s, vertical spindle e revolving in bearings carried by
the moveable table or frame n, pulley r³ and driving cord g, substantially as and for
the purpose described.
18. The modified arrangement of apparatus illustrated in Figure 23, consisting of
an abrasive band g, pullies 1, 2, and 78, carried by the moveable table or irame n,
substantially as and for the purpose described.
Dated this 7th day of August 1892.
EDWARDS & Co.,
35, Southampton Buildings, London, Agents for the Applicants.