Improvements in Reversing Driving Gear for Mangling, Calendering, and like Machines.
Year: 1893

page_text: Date of Application, 24th Oct., 1893
Complete Specification Left, 21st July, 1894-Accepted, 25th Aug., 1894
PROVISIONAL SPECIFICATION.
Improvements in Reversing Driving Gear for Mangling, Calendering,
and like Machines.
We, WILLIAM ROBERTSON, and JAMES GUTHRIE ORCHAR, of Wallace
Foundry, Dundee, in the County of Forfar, North Britain, Engineers, and
WILLIAM ADIE, of the same place, Draughtsman, do hereby declare the nature
of this invention to be as follows, that is to say :-
Our said invention has for its object to improve the construction and operation
of reversing driving gearing for mangling, calendering, and like machines.
In the improved machinery the driving gear comprises a first-motion shaft which
communicates rotation to the rollers of the mangling or other machine through
pinion-and-spur-wheel gearing of a usual kind. The first-motion shaft has loose on
it, two pulleys which are driven in opposite directions from a power shaft by means
of open and crossed belts or ropes, or by a single belt or rope, according to a new
arrangement. In this arrangement the contact or closeness of the crossing parts of
the rope or belt, as in ordinary arrangements, is avoided by using a single endless
rope or belt of sufficient length to pass round both pairs of pulleys, and by
arranging the crossed loop to run from one driving pulley and after going round
one driven pulley to return to the other side of the other driving pulley, the open
loop also running from one driving pulley and returning to the other. The driven
pulleys are formed with internally coned rims with which externally coned frictional
clutch drums can be engaged, the clutch drums being made with bosses engaging
with the shaft by grooves and keys, and movable along the shaft by forked levers
acting in grooves in the bosses. The clutch drums being movable by separate
levers, stops in connection with each lever are separately adjustable. For moving
the clutch levers, a single-acting hydraulic cylinder is connected to each, whilst one
slide valve controls the passage of water into and from both cylinders. The valve
rod is moved by a cam on a disk or bevil wheel driven by a bevil pinion on a short
shaft having on it stepped pulleys to receive a driving belt from reversely stepped
pulleys on the second-motion shaft of the gear. This apparatus brings about
automatic reversal of the motion transmitted by the driving gear as employed in
mangling operations, the period between the reversals being alterable by changing
the position of the belt on the stepped pulleys. Or the starting, reversing, and
stopping of the motion may be effected by hand by means of a handle on the
pulleys on the bevil-pinion shaft, the belt for driving that shaft being then
removed.
Each clutch lever when moving out of gear is arrested by a rigid, adjustable
screw stop pin; and when moving into gear it also encounters an opposite
adjustable screw stop pin, but this stop pin is held by a spring which prevents the
gripping contact between the clutch drum and pulley from being completed too
abruptly and diminishes the concussive strains on the machinery.
Dated this Twenty-third day of October 1893.
EDMUND HUNT,
Applicants' Agent.

page_text: COME MELE DEVIFICATION,
Improvements in Reversing Driving Gear for Mangling, Calendering,
and like Machines.
We, WILLIAM ROBERTSON, and JAMES GUTHRIE ORCHAR, of Wallace
Foundry, Dundee, in the County of Forfar, North Britain, Engineers, and
WILLIAM ADIE, of the same place, Draughtsman, 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, that is
to say:-
•
Our said invention has for its object to improve the construction and operation
of reversing driving gearing for mangling, calendering, and like machines.
Machinery as made according to our invention is delineated on three accom-
panying sheets of explanatory drawings
Figure, 1, on Sheet, 1, thereof, being a sectional plan, and Figures, 2, and, 3,
transverse vertical sections of details hereinafter described.
Figure, 4, on Sheet, 2, is a diagrammic elevation of parts of the machine; and
Figure, 5, on Sheet, 3, is a sectional plan, and Figure, 6, is a sectional elevation
of other parts of the machine.
In these drawings the same reference letters and numerals are used to mark the
same or like parts where-ever they are repeated.
In the improved machinery the driving gear comprises a first-motion shaft, A,
which communicates rotation to the rollers, B, of the mangling (or other) machine
through pinion-and-spurwheel gearing, C, of a usual kind. The first-motion
shaft, A, has loose on it two pulleys, D, and, E, which are driven in opposite
directions from a power shaft, F, by means of open and crossed belts or ropes or
by a single belt or rope, G, according to a new arrangement. In this arrangement
the contact or closeness of the crossing parts of the rope or belt which occurs in
ordinary arrangements is avoided by using a single endless rope or belt of sufficient
length to pass round both pairs of pulleys, D, E, H, and, J, and arranged in two
loops an open and a crossed one the crossed loop running from one driving pulley, H,
for example, and after crossing, going round one driven pulley, D, and returning to
the other side of the other driving pulley, J, whilst the open loop runs from the
driving pulley, J, and after going round the driven pulley, E, returns to the other
side of the other driving pulley, H. The driven pulleys, D, and, E, are formed
with internally coned rims, K, with which externally coned frictional clutch
drums, L, can be engaged the clutch drums being made with bosses, M, engaging
with the shaft, A, by grooves and keys (not shown) and movable along the shaft
by forked levers, N, acting on rings, P, which are loose in grooves in the bosses.
The clutch drums, L, are movable by separate levers, N, and in connection with
each lever, stops are provided which are separately adjustable. For moving the
clutch levers, N, a single-acting hydraulic cylinder, R, is connected to each whilst
one slide valve, S, controls the passage of water into and from both cylinders. The
valve rod, T, is connected to a bar, T1, which works in guides and is fitted with
antifriction rollers between which acts a cam, U, on a shaft, V, having on it a bevil
wheel, V 1, driven by a bevil pinion, V 2, on a short shaft, V 3, having on it
stepped pulleys, V 4, to receive a driving belt from reversely stepped pulleys, V 5,
on the second-motion shaft, V 6, of the gear. This apparatus brings about
automatic reversal of the motion transmitted by the driving gear as employed in
mangling operations, the period between the reversals being alterable by changing
the position of the belt on the stepped pulleys, V 4, and, V 5. Or the starting,
reversing, and stopping of the motion may be effected by hand by means of a
handle, V 7, on the pulleys, V 4, on the bevil-pinion shaft, 3, the belt for driving
that shaft being then removed.

page_text: Each clutch lever, N, when moved to withdraw its clutch drum, L, out of gear
is arrested by a rigid adjustable screw stop pin, W; (Figures, 2, and 3); and
when moving into gear it also encounters an opposite adjustable screw stop pin, X,
but this stop pin is held by a spring, Y, which prevents the gripping contact
between the clutch drum, L, and pulley, D, or, E, from being completed too
abruptly and diminishes the concussive strains on the machinery. A rod, Z,
provided with a handwheel, Z 1, and having reversely screwed parts is arranged to
act on the outer ends of the levers, N, for the purpose of withdrawing both
friction cones, K, out of contact altogether from the pulleys, D, and, E.
To reduce the friction between the washers, A. i, and parts bearing on them
anti-friction balls (not shown) may be arranged to intervene with, it is believed,
beneficial results.
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 that what
we claim is:
1. The combination and arrangement of parts constituting the improved
reversing driving gear for mangling, calendering, and like machines, substantially
as hereinbefore described.
2. The transmitting of motion in opposite directions to two pulleys from pulleys
on a driving shaft by means of one endless rope or belt arranged with open and
crossed loops substantially as hereinbefore described.
3. The improved combination of parts comprising the clutches of the driven
pulleys, the levers which move the clutches with their adjustable and spring stops,
and the apparatus for moving the levers substantially as hereinbefore described.
Dated this Twentieth day of July 1894.
EDMUND HUNT,
Applicants' Agent.