IMPROVEMENTS IN GRINDING AND POLISHING MACHINES
Year: 1885

page_text: We ROBERT LUKE and MOUNTFORD SPENCER both of Lime Bank Works
Ardwick Manchester in the County of Lancaster, Engineers, do hereby declare
the nature of said invention for "IMPROVEMENTS IN GRINDING AND POLISHING
MACHINES" to be as follows:-
"
•
In a Grinding and Polishing Machine constructed in accordance with the present
Improvements, the grinding or polishing operation is performed by a rotating
grinding or polishing wheel, secured upon a horizontal spindle, which may have
an automatic reciprocating endwise movement imparted to it, (by one or other
suitable known method) for the purpose of constantly changing the situation of
the grinding or polishing wheel, and the work to be operated upon is secured upon
a horizontal table, which has an automatic reciprocating horizontal movement
imparted to it in a direction at right angles to the axis of the grinding or polishing
wheel. The reciprocating table works along guides upon a supporting slide, which,
together with the reciprocating table, which it carries, is adjustable vertically, for
the purpose of taking in different sizes of work and of controlling and adjusting
the
"feed ог cut," by means of a screw and nut suitably actuated. The
supporting slide, when in process of adjustment, moves along guides formed on the
body or standard of the machine. The reciprocating table is actuated through a
rack (on the underside of the table) and pinion, the pinion being secured upon a
horizontal shaft carried in bearings in the slide which supports the table; upon
one end of this horizontal shaft is secured a bevel wheel, which gears into another
bevel wheel mounted upon a vertical shaft through which it is driven, and along
which it is free to slide when the reciprocating table is being adjusted either
upwards or downwards. The vertical shaft may be driven from a horizontal shaft
either through a worm and worm wheel, or through a pair of bevel wheels, according
as one system or the other is best adapted for the speed at which it is desired to
actuate the reciprocating table; the horizontal shaft last mentioned, and, through
it, the other mecbanism described above for producing the reciprocations of the
table, is driven in alternative directions through two "fast" belt driving pulleys,
having a "loose" pulley between them (as is common in machines for planing
metals), and other suitable intermediate mechanism.-The driving belt shifter
is actuated automatically (for producing the reversals in the movement of the
horizontal table) through suitable mechanism, which is acted upon by adjustable
D033

page_text: stops secured to the table; and by suitably adjusting these stops the reciprocations
of the table can be regulated to suit the requirements of the work to be operated
upon, as in the case of the reciprocating tables of machines for planing metals.
In some cases the vertical shaft may be driven through a bevel wheel secured upon
it, and through two other bevel wheels gearing into it; one of these two bevel
wheels being secured upon a hollow shaft on which is also secured one of the fast
driving pulleys, and the other bevel wheel being secured upon another shaft which
passes through the hollow one, and has the other fast pulley secured upon it. The
interior shaft of these two may either be a solid one working in suitable end
bearings, or it may be a hollow one rotating upon a fixed shaft or stud situated
within it.
100K

page_text: We ROBERT LUKE, and MOUNTFORD SPENCER both of Lime Bank Works
Ardwick Manchester in the County of Lancaster, Engineers, do hereby declare
the nature of this invention for IMPROVEMENTS IN GRINDING AND POLISHING
MACHINES and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement, and the accompanying
sheet of Drawings :—
"
"
In a Grinding and Polishing Machine constructed in accordance with the present
improvements, the grinding or polishing operation is performed by a rotating
grinding or polishing wheel, secured upon a horizontal spindle, which may have an
automatic reciprocating endwise movement imparted to it (by one or other suitablo
known method) for the purpose of constantly changing the situation of the grinding
or polishing wheel; and the work to be operated upon is secured upon a horizontal
table, which has an automatic reciprocating horizontal traverse imparted to it, in a
direction at right angles to the axis of the grinding or polishing wheel. The
traversing table works along guides upon a supporting slide, which is adjustable
vertically in guides on the body of the machine, (for the purpose of setting the
work to the required height, and of applying the "feed" or 'cut") by means of a
screw and nut. The traversing table is actuated through a rack (on the underside
of the table) and pinion, the pinion being secured upon a horizontal shaft carried
in bearings in the slide which supports the table; upon one end of this horizontal
shaft is secured a bevel wheel, gearing into another bevel wheel mounted upon a
vertical shaft through which it is driven, and along which it is free to slide when
the supporting slide is being adjusted either upwards or downwards. The vertical
shaft may be driven from a horizontal one either through a worm and worm wheel,
or through a pair of bevel wheels, according as one system or the other is best
adapted for the speed at which it is desired to actuate the traversing table; the
horizontal shaft last mentioned, and, through it, the other mechanism described
above for producing the reciprocations of the table, is driven in alternate direc-
tions through two "fast" belt driving pulleys, having a "loose" pulley between
them (as is. common in machines for planing metals), and other intermediate
mechanism. The driving belt shifter is actuated automatically (for producing the
reversals in the movements of the traversing table) through mechanism which is
acted upon by adjustable stops secured to the table; and by adjusting these stops
the reciprocations of the table can be adapted to suit the requirements of the work,
as in the case of the reciprocating tables of machines for planing metals. In some
cases the vertical shaft may be driven through a bevel wheel secured upon it, and
through two other bevel wheels gearing into it; one of these two bevel wheels
being secured upon a hollow shaft on which is also keyed one of the fast driving
pulleys, and the other bevel wheel being secured upon another shaft passing through
the hollow one and having the other fast pulley keyed upon it. The interior shaft
may either be a solid one rotating in end bearings, or it may be a hollow one
rotating upon a fixed shaft or stud situated within it.
In the drawings Fig. A is a side elevation, Fig. B a side elevation partly in
section, and Fig. C a front elevation.-1 is the body of the machine,-2 the

page_text: secured thereupon.-The spindle is traversed to and fro endwise (for the purpose
of constantly changing the position of the wheel 3) by the bell crank 4, vibrated
by a crank pin on the worm wheel 5, which is driven by the worm 6, mounted on
the spindle 2, which is free to slide endwise through it.-The "throw" of the
crank pin is adjustable for the purpose of varying the extent of the end traverse
of the spindle as may be required; and of suspending this end traverse altogether
when desired.-7 is the horizontal traversing table on which the work is secured;
it is carried by the supporting slide 8 and reciprocated to and fro upon it, in a
direction at right angles to the axis of the wheel 3.-The supporting slide 8 is
adjustable vertically along guides on the body of the machine as shewn, by means
of the screw 9 (actuated by a hand wheel 10,-shaft 11 and worm and worm wheel)
and nut 12.-The traversing table 7 is provided underneath with a rack drivon by
'the pinion 13, on the horizontal shaft 14; which latter is carried in bearings in
the slide 8, and is actuated alternately in either direction through the bevel
wheels 15, 16, vertical shaft 17, worm wheel 18, worm 19 and horizontal shaft 20.-
The bevel wheel 16 is carried in a bearing in the slide 8 and is free to travel along
the shaft 17 when the slide is moved up or down. On shaft 20 is a spur wheel
gearing both with wheel 21 and wheel 22, the latter being cast in one with
wheel 28. Wheel 21 is formed with a long boss having on one end of it a fast
pulley 24, which thus drives the shaft 20 in one direction. This shaft is driven in
the other direction by another fast pulley 25 rotating on the boss of wheel 21, and
cast in one with a wheel 26, gearing into wheel 23.-27 is a loose pulley situated
between the two fast ones.-28 is the belt shifter actuated automatically (for
producing the reversals in the movements of the traversing table 7) through the
connecting bar 29 and lever 30, which is acted upon by the adjustable stops 31, 32,
secured to the traversing table. A handle, as shewn, is provided on the connecting
bar 29 for operating the belt shifter manually when required. The combined
reciprocating movements of the spindle 2 and traversing table 7 enable plain
surfaces to be ground or polished automatically with precision and economy.-
When it is desired to traverse the table at a greater speed than is afforded by the
worm 19 and worm wheel 18, a pair of bevel wheels may be employed in place of
these, for transmitting motion froin shaft 20 to shaft 17.-In some cases there may
be two bevel wheels both gearing into one on the lower end of shaft 17; one of
these two bevels being secured upon a hollow shaft, on which is also keyed one of
the fast driving pulleys, and the other bevel being secured upon another shaft,
passing through the hollow one, and having the other fast pulley keyed upon it.―
The interior shaft may either be a solid one rotating in end bearings, or it may be
a hollow one, rotating upon a fixed shaft or stud situated within it.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is:-
1. In a Grinding and Polishing Machine the combination of a rotating grinding
and polishing wheel having a self acting reciprocating movement along its axis,
with a self acting reciprocating table (for holding the work) adjustable vertically,
substantially as shown and described.
2. The general arrangement of a Grinding and Polishing Machine substantially
as shown in Figs. A, B, C, and described.