Year: 1886

page_text: Date of Application, 7th Dec., 1886
Complete Left, 7th Sept., 1887
Complete Accepted, 4th Nov., 1887
I, WILLIAM WILSON HULSE of the Ordsal Tool Works, Salford, in the County
of Lancaster, Engineer do hereby declare the nature of this invention to be as
follows:-
In a Lathe constructed in accordance with the present improvements, the bed is
strengthened by the addition of a longitudinal trough-shaped beam situated within
the bed to the top of which it is connected by its upper edges. There are cross ribs
connecting with the outside of the trough, and the bottom of the trough has openings
in it for convenience in moulding and through which the cuttings may pass. The
front edge of the bed may be of the usual V section, and the back edge (which in a
"duplex" lathe has to withstand an upward strain) of rectangular section or with the
V pointing downwards. When a single guide screw is employed it is by preference
situated within the bed, and instead of the adjusting and locking nuts being as is
usual placed at or near its extreme right band end they are arranged at the left hand
of the screwed part of the guide screw, so that both the fixed collar and the nuts
stand comparatively near together. This arrangement enables any end play in a long
guide screw to be effectually taken up without risk of either jamming or great friction
being produced by contraction of the guide screw. The adjusting and locking nuts
on the Lathe spindle may be applied against the inside of the front bearing instead of
(as usual) against the outside of the outer bearing; this arrangement being for the
purpose of giving steadiness to the spindle in working and of diminishing the overhang
of the parts beyond the outer bearing of the lathe spindle. The overhang already
referred to may be still further diminished by placing the spur wheel (on the spindle),
through which the change wheels are driven. between the two bearings of the spindle,
instead of outside the outer bearing as usual. A further addition to the steadiness of
the spindle in working is attained by forming the front bearing with several collars
on the spindle working in corresponding recesses in the steps. When this bearing is
thus formed the tail pin may be omitted. In order to ensure the lubrication of the
surfaces of the tail pin and of the spindle exposed to end pressure, a trough is provided
to contain oil for the purpose.

page_text: When only a single guide screw is employed, the lathe may be fitted with a back
shaft, having two sets of three bevel wheels each, in connection with the sliding
carriage or with each sliding carriage, if more than one is employed. Each set of
bevel wheels is combined with a clutch (on the back shaft), by means of which the
wheels may be made to rotate in either direction or have their rotation suspended at
will. One set of these bevel wheels drives mechanism for traversing the slide rest
(or slide rests, if two are employed on the carriage) transversely for surfacing; and
the other set drives mechanism for traversing the sliding carriage longitudinally by
rack and pinion. The mechanism for traversing the sliding carriage may also be
actuated by hand. In some cases twin guide screws (one at each side of the bed)
may be employed. This arrangement is very suitable for a gap lathe as the two
screws may be so situated as to act upon the sliding carriage or carriages without
causing them to crosswind on the bed, and at the same time to allow objects of large
diameter to be operated upon over the gap. Each carriage connects with the two
guide screws by means of two respective simultaneously disengageable nuts, and
mechanism is provided by means of which one or both of the screws, are made to
impart a self-acting surfacing motion to the slide rest or slide rests when the nuts are
disengaged. The two guide screws are connected together by suitable mechanism
and are driven from the spindle through the change wheels.
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page_text: Improvements in Lathes.
I, WILLIAM WILSON HULSE of the Ordsal Works, Salford, in the County of
Lancaster, Engineer, 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 the accompanying Drawings:-
"
In a Lathe constructed in accordance with the present improvements, the bed is
strengthened by the addition of a longitudinal trough shaped beam situated within the
bed to the top of which it is connected by its upper edges. There are cross ribs,
connecting with the outside of the trough, and the bottom of the trough has openings
in it for convenience in moulding and through which the cuttings may pass. The
front edge of the bed may be of the usual ✓ section, and the back edge (which in a
duplex" Lathe has to withstand an upward strain) of rectangular section or with
the V pointing downwards. When a single guide screw is employed it is by preference
situated within the bed, and instead of the adjusting and locking nuts being as is usual
placed at or near its extreme right hand end they are arranged at the left hand of the
screwed part of the guide screw, so that both the fixed collar and the nuts stand
comparatively near together. -This arrangement enables any end play in a long
guide screw to be effectually taken up without risk of either jamming or great friction
being produced by contraction of the guide screw. The adjusting and locking nuts
on the lathe spindle may be applied against the inside of the front bearing instead of
(as usual) against the outside of the outer bearing; this arrangement being for the
purpose of giving steadiness to the spindle in working and of diminishing the overhang
of the parts beyond the outer bearing of the lathe spindle. The overhang already
referred to may be still further diminished by placing the spur wheel (on the spindle),
through which the change wheels are driven, between the two bearings of the spindle
instead of outside the outer bearing as usual. A further addition to the steadiness
of the spindle in working is attained by forming the front bearing with several collars
on the spindle working in corresponding recesses in the steps. When this bearing is
thus formed the tail pin may be omitted. In order to ensure the lubrication of the
surfaces of the tail pin and of the spindle exposed to end pressure, a trough is provided
to contain oil for the purpose.
When only a single guide screw is employed, the lathe may be fitted with a back
shaft, having two sets of three bevel wheels each, in connection with the sliding
carriage, or with each sliding carriage, if more than one is employed-Each set of
bevel wheels is combined with a clutch (on the back shaft) by means of which the
wheels may be made to rotate in either direction or have their rotation suspended at
will. One set of these bevel wheels drives mechanism for traversing the slide rest
(or slide rests, if two are employed on the carriage) transversely for surfacing; and
the other set drives mechanism for traversing the sliding carriage longitudinally by
rack and pinion. The mechanism for traversing the sliding carriage may also be
actuated by hand. In some cases twin guide screws (one at each side of the bed)

page_text: may be employed. This arrangement is very suitable for a gap Lathe as the two
screws may be so situated as to act upon the sliding carriage or carriages without
causing them to crosswind on the bed, and at the same time to allow objects of large
diameter to be operated upon over the gap.-Each carriage connects with the two
guide screws by means of two respective simultaneously disengageable nuts, and
mechanism is provided, by means of which one or both of the screws are made to
impart a self acting surfacing motion to the slide rest or slide rests when the nuts
are disengaged. The two guide screws are connected together by suitable mechanism
and are driven from the spindle through the change wheels.
In the accompanying Drawings Fig. A is an end elevation,-Fig. B a front elevation
and Fig. C a transverse section of a Lathe constructed in accordance with the present
improvements:-1 is the bed of the Lathe strengthened by the longitudinal trough
shaped beam 2 shown in transverse section in Fig. C-This beam is connected at its
upper edges with the top of the bed 1 as shown, and has cross ribs 3 on the outside
connecting it with the sides of the bed. In the bottom of the trough are openings 4
(Fig. C.) which occur at suitable intervals for convenience in moulding the bed and
for allowing the cuttings to pass through. The slide at the front edge of the bed is
of section and that at the back of the bed of rectangular section as shown. The
lathe is fitted with a single guide screw 5 situated within the trough and having
adjusting and locking nuts 6 arranged to the left hand of its screwed part. 7 is the
collar of the guide screw and it will be seen that the distance between this and the
nuts 6 is so small that even with a very long guide screw its end play may be taken
up without the risk of either jamming or great friction being produced at the collar
and nuts by contraction of the guide screw, which is free to lengthen or shorten under
varying temperature., 8 is the lathe spindle having adjusting and locking nuts 9
applied against the inside of the front bearing 10 of the spindle instead of (as usual)
against the outside of the outer bearing 11, for the purpose of giving steadiness to
the spindle in working, and of diminishing the overhang of the parts beyond the
outer bearing 11 of the spindle-This overhang is still further diminished by placing
the spur wheel 12 (on the spindle) through which the change wheels are driven-A
tail pin as shown receives the end thrust of the spindle and in order to insure the
efficient lubrication between the tail pin and the end of the spindle an oil trough 13
is provided into which they dip. 14 is a back shaft driven from the spur wheel 12
as shown in Fig. A and carrying two sets of bevel wheels in connection with sliding
carriage 15 (having two slide rests) as shown in Figs. B and C. Each set of these
wheels consists of two bevel wheels turned face to face and both gearing into a third
bevel wheel mounted on a cross shaft-One of the cross shafts also has keyed upon it
a spur wheel 16, and the other a spur wheel 17. There is a clutch on the back shaft
to each of the two sets of bevel wheels by means of which the action of the bevel
wheels can be started or stopped or reversed at will. The spur wheel 16. drives a spur
wheel 18 mounted on the transverse traversing screw 19 of one of the slide rests,
and the spur wheel 18 drives a spur wheel 20 mounted upon the transverse traversing
screw of the other slide rest. Each of the wheels 18, 20 is provided with a clutch
for enabling it to be engaged with or disengaged from the screw on which it is carried.
spur
wheel 17 drives a spur wheel 22 through two spur wheels both mounted on
one shaft.
22 is keyed on a transverse shaft 23 from which motion is communicated
to a spur wheel 24 (Fig. C) and thence, through the shaft which carries it, to a
pinion 25 gearing into a rack 26. Thus the spur wheel 16 transmits motion for the
surfacing actions, and the spur, wheel 17 for sliding by rack and pinion. The wheel 22
is provided with a clutch by means of which this sliding action can be started or
stopped.
The
Fig. D is an end elevation, Fig. E a front elevation and Figs. F and G are cross
sections of a gap lathe constructed in accordance with the present improvements. The
parts which correspond to those in Figs. A, B, C, are correspondingly numbered-In
this lathe the tail pin is omitted and the end thrust of the lathe spindle is taken by a
series of collars on the spindle which work in corresponding recesses in the steps of
the front bearing as shown in Fig. E. Twin rotating guide screws 27, 28 are employed

page_text: in this lathe connected together by the cross shaft 29 and bevel wheels as shown.
This cross shaft is driven from the lathe spindle through change wheels as shewn, and
through a short longitudinal shaft 30 which connects to it by a pair of bevel wheels--
It will be seen from the positions of the twin guide screws that they will act upon
the sliding carriage 15 without causing it to crosswind on the bed of the lathe, and
that they will allow large objects to be operated upon over the gap, 31, 32 are two
nuts carried by the sliding carriage and which can be simultaneously engaged with or
disengaged from the two guide screws 27, 28 respectively being connected together
(see Fig. F) through worm sectors and worms (as shown) transverse shafts 33, 34,
spur wheels 35, 36 and 37, 38 and a cross shaft on which both the wheels 36, 38 are
keyed. When the nuts 31, 32 are disengaged from the guide screws, the guide
screw 28 (see Fig. G) may be employed for traversing the slide rests on the
carriage 15 for surfacing through the worm wheel 39 shaft 40, spur wheels 41, 42
and through spur wheels as shown on the transverse screws of the two slide rests
which are coupled together similarly to those in Fig. B the carriage being at the
time locked in position. The worm wheel 39 and screw 28 may also be employed as
a pinion and rack for traversing the carriage by hand when the nuts 31, 32 are out
of gear.
The worm wheel 39 is provided with a clutch as shewn by means of which the
surfacing actions may be either started or stopped. In this lathe both the spur
wheel 12 and the locking and adjusting nuts 9 are placed to the outside of the outer
bearing of the lathe spindle.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. In a Lathe the employment of twin rotating guide screws driven from the Lathe
spindle through change wheels & coupled together so as to be rotated simultaneously,
substantially as shewn in Figs. D, E, F, G, and described.
2. The general arrangement of a Lathe substantially as shown in Figs. A, B, C,
and described.
3. The general arrangement of a Lathe substantially as shown in Figs. D, E, F, G,
and described.
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