Improvements in Vices.
Year: 1891

page_text: Date of Application, 24th Aug, 1891
Complete Specification Left, 24th May, 1892-Accepted, 25th June, 1892
PROVISIONAL SPECIFICATION.
Improvements in Vices.
I, JAMES WATERHOUSE MIDGLEY of Park Lane Machine Works, Keighley
in the County of York, Machine Maker, do hereby declare the nature of this
invention to be as follows, that is to say :-
It relates to improvements in vices of the class known as "instantaneous grip
vices" and consists of arranging and constructing certain of the parts forming
these vices in such a manner that same may be produced cheaply and yet be
thoroughly efficient in their operations.
I attain this object by making use of the fixed and moveable jaws in the con-
struction of these vices as in the well known manner, however instead of forming
the nut or screwed sleeve or block, through and in connection with which the
screw operates, to entirely encircle said screw, I form it so that it only spans about
one half thereof in order to allow same to be freely removed from contact there-
with as is necessary to permit the advancing or receding movements of the jaw
when the screw is not to be used for effecting these movements.
This screwed segment or nut is fixed in an appropriate position to the vice's
stationary jaw and in order that the threads of the screw may be moved out of
contact therewith, in one case, I remove about half of the thread from said screw,
which has then a peripheral surface partly screwed and partly plain, so that when
the said screw is rotated sufficiently far to bring its plain part opposite the screwed
segment the vice's jaw is perfectly free to be moved as desired while when the
screw is further rotated its threaded part moves into contact with the segment and
so causes the jaw to grip.
Another method of forming the screw so that it may be moved by its rotary
motion out of contact with the screwed segment, consists of making a flattened
screw', and forming
part on the necks or bearing portions at each extremity of said
a correspondingly flattened part in the bearing of the moveable jaw so that when
the screw is rotated sufficiently far for its flattened necks to be opposite the
flattened part in the bearing, the said screw either falls by its own weight out of
gear with segment or, by having a catch or hook at or near one extremity operating
in connection with so as to lay hold of a projecting pin when in a certain position,
and the weight of the handle (which acts as a lever by operating on a supplementary
pin as its fulcrum) for causing a similar rising at the other extremity, it is raised
out of contact with said screwed segment, should same be respectively above or
below said screw as the case may be.
Again by mounting the screw with its flattened necks in sliding bearings that
may be raised by cams mounted on a rod partly rotated by being in connection
with recesses formed in the hub on said screw, instead of said flattened necks being
allowed to let the screw fall out of gear with its screwed segment supplementary
necks operating in the sliding bearing keep said screw in contact with its segment
so long as the user may desire thus the loose jaw may be moved its entire distance
of travel in or out by rotating the screw while if it is thought fit to liberate said
screw by a slight rotation of the cams it is allowed to fall as desired.
The method of constructing the parts of vices as hereinbefore described may be
followed in the making of either those known as parallel vices or those having
hinged jaws and known as "staple" vices.
Dated this 22nd day of August 1891.

page_text: COMPLETE SPECIFICATION.
Improvements in Vices.
I JAMES WATERHOUSE MIDGLEY of Park Lane Machine Works, Keighley
in the County of York, Machine Maker, 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 :-
"
It relates to improvements in vices of the class known as "instantaneous grip
vices
and consists of arranging and constructing certain of the parts forming
these vices, in such a manner that same may be produced cheaply and yet be
thoroughly efficient in their operations.
and
In the accompanying sheets of drawings
Fig. 1 is side elevation of a vice constructed in accordance with my invention,
Fig. 2 is a sectional side elevation of a portion of said vice.
Figs. 3 and 4 are sectional end views shewing the vice's screw in and out of gear
with its screw.
Figs. 5 and 6 are part sectional side and end views of a vice made in accordance
with my invention but with the nut or screwed sleeve arranged differently.
Figs. 7 and 8 are sectional front elevations shewing the screw in and out of
position with its nut, and Figs. 9 and 10 are sectional back views also shewing the
screws in the said positions respectively.
Figs. 11 and 12 are part sectional side and end elevations of another class of
vices constructed in accordance with my invention.
Figs. 13, 14, 15 and 16 are similar views to Figs. 7, 8, 9 and 10 but are illustrative
of the class of vices shewn by Figs. 11 and 12.
Figs. 17 and 18 are sectional side and top views of another method of arranging
the parts of a vice to attain the object hereinbefore described.
Figs. 19 and 20 are sectional end views shewing the screw in and out of gear
with its nut.
I attain the object of my invention by making use of the fixed and moveable
jaws a and b in the construction of these vices as in the well known manner, however
instead of forming the nut or screwed sleeve c, through and in connection with
which the screw d operates, to entirely encircle said screw d, I form it so that it
only spans about one half thereof in order to allow same to be freely removed from
contact therewith as is necessary to permit the advancing or receding movements
of the jaw b when the screw d is not to be used for effecting these movements.
This screwed segment or nut c is fixed in an appropriate position to the vices
stationary jaw a and in order that the threads of the screw d may be moved
out of contact therewith, in one case, I remove about half of the thread from said
screw d as shewn by Figs. 1, 2, 3 and 4, so that this screw has then a peripheral
surface partly screwed and partly plain, by which means when the said screw dis
rotated sufficiently far to bring its plain part d' opposite the screwed segment e the
vice's jaw b is perfectly free to be moved as desired while when the screw d is
further rotated its threaded part moves into contact with said segment c and so
causes the jaw to slightly advance towards the jaw a by which movement it
will grip anything placed between it and said jaw a.
Another method of forming the screw d so that it may be moved by its rotary
motion out of contact with the screwed segment c, consists of making a flattened
part d' on the necks or bearing portions at each extremity of said screw and forming
a correspondingly flattened part b' in the bearing of the moveable jaw b so that
when the screw d is rotated sufficiently far for its flattened necks d² to be opposite
the flattened part 6 in the bearing of the jaw b, the said screw d either falls by its
own weight out of gear with the segment c as is the case when said segment is
placed above said screw d and as shewn by Figs. 11, 12, 13 and 14, or by having a

page_text: catch or hook e at or near one extremity' (see Fig. 6) operating in connection with
so as to lay hold of a projecting pin f when in a certain position, and the
weight of the handle g (which acts as a lever by operating on a supplementary
pinas its fulcrum) for causing a similar rising at the other extremity, it (said
screw d) is raised out of contact with its said screwed segment c as is the case when
the segment c is below the screw d as shewn by Figs. 5 to 10 inclusive.
Again by mounting the screw d with its necks in sliding bearings k k₁ that may
be raised by cams 1, 1 mounted on a rod or shaft m partly rotated by its finger
piece being in conection with a recess formed in the hub 3 on said screw d,
instead of said flattened necks being used for allowing the screw to fall out of gear,
the turning or rotating of the cams and effect this object, and the rotating of
said finger piece n is arranged to be effected only when the screw d moves in the
direction for drawing the jaw b from gripping such direction being indicated by
the arrow in Fig. 21, thus the said jaw b when rotated for being moved towards
the jaw a may be made to move its entire distance in this direction when desired,
while when it is thought fit to liberate said screw by slightly rotating it in the
opposite direction. its cams land l' are moved to allow it to fall out of gear.
The method of constructing the parts of vices as hereinbefore described may be
followed in the making of either those known as parallel vices shewn by Figs. 1, 5
and 17 or those having hinged jaws and known as staple vices shewn by Figs. 11
and 12.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, declare that what I
claim is.
1. The combination of a half threaded screw with a segment nut arranged to be
fixed or fitted to the stationary jaw of a vice in the position shewn by Figs. 1 to 4
of the drawings substantially as specified.
2. The screw of a vice having its bearing necks flattened in a certain part, in
combination with the jaw of said vice having its bearing parts correspondingly
flattened substantially as herein described.
3. The screw of a vice having its bearing necks flattened and carrying a pro-
jecting pin on one end and a hooked piece on the other, in combination with the
jaw of a vice having correspondingly flattened parts in its bearings and projecting
pins arranged for operating contact with the projecting pin and hook attached to
the screw substantially as specified.
4. Supplementary cams arranged to be operated so as to throw the screw of
a vice into or allow it to fall out of gear substantially as herein set forth and
described.
5. The general arrangement and combination of parts forming a vice substan-
tially as herein described and for the purpose specified.
Dated this 23rd day of May 1892.
J. W. MIDGLEY,
Per Samuel Hey,
Agent.