IMPROVEMENTS IN THE CONSTRUCTION OF PARALLEL VICES as follows:
Year: 1885

page_text: I JAMES WATERHOUSE MIDGLEY of Park Lane Machine Works, Keighley in
the county of York, Machine Maker, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN THE CONSTRUCTION OF PARALLEL VICES
as follows:-
"
to be
The object of my invention is to construct parallel vices, so that the relax of the
jaws is instantaneous Upon or near the screw spindle, I place a spring preferably
spiral, in such a position, (between the nut and the loose jaw), so that on releasing
the vice, the spring causes the jaws to instantly release their hold the nut for the
screw is placed about midway the length of the sleeve and in the sleeve of the
loose jaw, the sleeve is open at the end and has longitudinal slots at the side,
a hinged support fitting into the ends of the slots (strengthens it and renders it
more firm and solid) which when the screw is screwed out, can be taken out, and on
putting the screw back a peg on the nut, acts on the support and returns it into
its position in the slots, a spring keeps it in, place, this may be applied to the
ordinary, existing parallel vices.
:
>
JOHNE WALSH,
Agent for the Applicant.
Improvements in the Construction of Parallel Vices.
I, JAMES WATERHOUSE MIDGLEY of Park Lane Iron Works Keighley in the
County of York Machine Maker do hereby declare the nature of my invention
for IMPROVEMENTS IN THE CONSTRUCTION OF PARALLEL VICES, and in what manner
the same is to be performed, to be particularly described and ascertained in and by
the following statement:-
This invention consists of an improvement in the construction of parallel vices
whereby their durability and strength is greatly enhanced, and in order that the

page_text: same may be clearly understood and readily carried into effect I have hereunto
attached a sheet of drawings illustrative thereof, the same bearing figures and
letters of reference used in the following description.
Fig. 1 is a side elevation and fig. 2 a sectional side elevation of a vice. Fig. 3 is
an end elevation of part of same while fig. 4 is a sectional side elevation of a
sufficient part of a vice to shew further modifications.
Like letters of reference indicate like parts in all the drawings.
Heretofore the gripping power of the jaw a has been obtained through the
screw b working in a nut rigidly fixed to the bottom part c, thus allowing the
article held within the grip of the said jaw a to have a great amount of leverage
over it as well as over the screw b and the nut in which it worked. To lessen this
leverage and consequently to strengthen these parts and so avoid breakages, I make
the bearings g g of the nut e in, or nearly in, the same plane as a straight line
through its centre and I attach them to the lower part of the stationary jaw f.
In order to allow the jaw a to work backward and forward I make a slot in
each side of the sleve d for the bearings g g¹ to pass through.
To give strength to the upper part of the aleve d I place a moveable
strengthening bith to fit into slot on each side thereof, the same being held in
position with small springs h¹ in a manner so that they may be easily removed
. whenever desired.
To give return movement to the jaw a I employ a spiral spring / which is placed
within the sleve d and may be arranged to press against a projecting piece fixed to
the nut e as shewn by fig. 2 or may be placed upon the screw b to press directly
upon the nut e as shewn by fig. 4 and against the front part or end of the sleve d
with the desired result.
I form the nut e with a part to pass over and above the sleve d so as to cover
and prevent the accumulation of dust, dirt etc, in or near the bearings of the said
.nut e.
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:-
1. The use and employment of a nut e with its bearings at or near its centre
part, in combination with a sleve & having a slot on each side substantially as
herein set forth and described.
2. The use and employment of the moveable piece h and spring in com-
bination with a sleve having slots in the manner and for the purposes as herein
described and as illustrated by the accompanying drawings.
Dated this 27th day of March 1886.
JAMES WATERHOUSE MIDGLEY.