Year: 1886

page_text: Date of Application, 1st Dec., 1886.
Complete Left, 31st Aug., 1887.
Complete Accepted, 4th Oct., 1887
1 JOHN MELLOR HAMPSON of Birch Vale in the County of Derby Millwright do
hereby declare the nature of this invention to be as follows:-
My invention relates to the construction of that class of toothed gearing known as
"box-wheels" which are employed for driving the engraved rollers in calico printing
and in other machines wherein great nicety of adjustment is required.
A "box-wheel" as ordinarily constructed consists, principally of two parts, one of
which is in the form of a disc with a long sleeve which is fixed by a key or otherwise
to the axle or mandrel of the roller to be driven, and the other, which is in the form
of a toothed wheel, fits on this sleeve (and partly on the disc) and is adjustable
thereon to a limited extend by means of a set screw, so that when the inner part is
keyed or fixed permanently on the axle or mandrel in its approximate position the
outer part or toothed portion can be adjusted either backwards or forwards by means
of the screw until the engraved roller "registers" exactly with the pattern to
be printed.
3:
The limit of this adjustment is however very narrow not exceeding the "pitch
of the wheel (or the distance between the centres of two teeth) or thereabouts, and
if any more extended adjustment is required it has to be effected by removing the
whole arrangement and keying it on in a fresh position, and then finally adjusting
the outer portion by means of the screw.
The object of my invention is to afford an unlimited facility of adjustment without
disturbing the key or removing the wheel from the axle or mandrel.
I make the "box-wheel" in two main parts as before vizt. the inner part or disc
with a long sleeve fixed with a screw upon the axle and keyed thereto, and the outer
or toothed part with its boss fitted so as to turn on the said long sleeve.
On the part of the disc which projects beyond the wheel I fix a steel ring the
periphery of which is cut so as to form a worm wheel. Into this fixed worm wheel

page_text: works a worm carried by a box which encloses the worm wheel, and is bolted by
means of a flange to the outer portion or toothed wheel. One end of this worm
projects through the box and is provided (by preference) with a head through which
holes are made for the insertion of a peg or key for turning the worm round, but any
other suitable means may be employed for turning the same. The worm is made 5
with a collar or shoulder so that it cannot move endwise in its bearings, and hence
it will be evident that by turning the worin (by means of a key or otherwise) the
toothed portion of the box wheel may be adjusted to any required extent without
disturbing the keyed or fixed portion of the same.
Dated this 30th day of November 1986
GEORGE DAVIES,
4, St. Ann's Square, Manchester,
Agent for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in "Box-wheels" Used in Calico Printing and other
Machines.
I JOHN MELLOR HAMPSON of Birch Vale in the County of Derby Millwright 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 relates to the construction of that class of toothed gearing known as
<< box-wheels "which are employed for driving the engraved rollers in calico printing
and in other machines wherein great nicety of adjustment is required.
A "box-wheel" as ordinarily constructed consists principally of two parts, one of
which is in the form of a disc with a long sleeve which is fixed by a key or otherwise
to the axle or mandrel of the roller to be driven, and the other which is in the form
of a toothed wheel, fits on this sleeve (and partly on the disc) and is adjustable
thercon to a limited extent by means of a set screw, so that when the inner part is
keyed or fixed permanently on the axle or mandrel in its approximate position the
outer part or toothed portion can be adjusted either backwards or forwards by means
of the screw until the engraved roller "registers" exactly with the pattern to be
printed.
22
The limit of this adjustment is however very narrow not exceeding the "pitch
of the wheel (or the distance between the centres of two teeth) or thereabouts, and
if any more extended adjustment is required it has to be effected by removing the
whole arrangement and keying it on in a fresh position and then finally adjusting
the outer portion by means of the screw.
The object of my invention is to afford an unlimited facility of adjustment without
disturbing the key or removing the wheel from the axle or mandrel.
The nature of my invention will be readily understood on reference to the drawings
hereunto annexed and the following explanation thereof.
Fig. 1 is a face view or elevation of a "box-wheel" made and fitted according to
my invention and Fig. 2 is a partial section and edge view of the same.
I make the "box-wheel" in two main parts as before, vizt., the inner part or
disc a, a with a long sleeve b, b fixed with a screw c, c upon the axle d, d and
keyed thereto, and the outer or toothed part e, e with its boss f, fitted so as to turn
on the said long sleeve b, b.
On the part or boss a¹ of the disc a, a which projects beyond the wheel e, e I fix
a steel ring g, g the periphery of which is cut so as to form a worm wheel. Into this
fixed worm wheel g, g works a worm h, h carried by a box ix, x which encloses the
fixed worm wheel 9. 9 and is bolted by means of a flange i, i to the outer portion or
toothed wheel e, e. One end of this worm projects through the box, and is provided
(by preference) with a head k, k through which holes are made for the insertion of
a peg or key for turning the worm h, h round, but any other suitable means may
be employed for turning the same.

page_text: The worm h, h is made with a collar or shoulder so that it cannot move endwise in
its bearings, and hence it will be evident that by turning the worm h, (by means of
a key or otherwise) the toothed portion e, e of the box wheel may be adjusted to any
required extent without disturbing the key or fixed portion a, a of the same.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed I declare that what I claim is :-
The combination with the inner or fixed portion of a box wheel of a ring of worm
teeth in gear with a worm carried by a box bolted to the outer or adjustable and
toothed portion of the said wheel, in such a manner that by turning the said worm
by a key or otherwise the outer or toothed portion of the wheel may be adjusted
without disturbing the key by which the inner portion is fixed or removing the
wheel from the axle or mandrel.
GEORGE DAVIES,
4, St. Ann's Square, Manchester,
Agent for the Applicant.