IMPROVEMENTS IN PARALLEL VICE
Year: 1885

page_text: I, JOSEPH PARKINSON of 14 Chester Street, Bradford in the County of York,
Machine Maker, do hereby declare the nature of my invention for IMPROVEMENTS
IN PARALLEL VICE to be as follows:-
The object of this invention is to arrange parallel vice in such a manner that
I am enabled to disconnect the nut from the vice screw and slide the loose jaw of
the vice by hand independent of the screw to or from the fast jaw, any distance
within the range of the vice slide: and when, the nut is in contact with the screw
to travel the loose jaw and grip the material between the same which I accomplish
in the following manner :-
The invention consists in arranging the vice nut so that it will engage or dis-
engage with the screw and may be attached to a lever or placed between two
upright projections forming part of the vice bed plate. The nut may be formed
with the upper portion cut away, or in two parts suitably placed, and when the.
nut is in contact with the screw passing through the sliding or loose jaw of the
vice, it is moved as in an ordinary vice: but when the operator desires to move the
sliding jaw quicker than can be done by the action of the screw, the nut is dis-
engaged from the screw by means of a lever, cam, or screw, thereby liberating the
sliding jaw which can then be moved to or from the fast jaw.
In case the vice is fitted with a divided nut, I actuate them, bringing them in
contact with or clear of the screw by a levered cam, to which are fitted rods con-
necting the same with the two portions of the nut. By moving the levered cam in
one direction, the two portions of the nut separate, thereby leaving the sliding jaw
free, or when moved in the opposite direction, they are brought in contact with
the screw, which when turned will cause the loose jaw to travel to or from the
fixed jaw as in the ordinary screw vice. Or the two portions of the nut may be
operated upon by springs and levers worked in combination with each other.
Dated this 16th day of April 1885.
WAUGH & CHAPMAN,
Agents for the Applicant.

page_text: I, JOSEPH PARKINSON, of 14 Chester Street Bradford in the County of York,
Machine Maker do hereby declare the nature of this invention for IMPROVEMENTS
IN PARALLEL VICE and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement:-
The object of this invention is to arrange parallel vice in such a manner, that
I am enabled to disconnect. the nut from the, vice screw, and, slide the loose jaw of
the vice by hand independant of the screw to or from the fast jaw, any distance
within the range of the vice slide: and when the nut is in contact with the screw,.
to travel the loose jaw any distance in or out from the fast jaw and grip the
material between the same and consists in forming the nut with a portion cut
away, or it may be in two parts which when in contact with the screw, the, loose
jaw is moved as in an ordinary vice; but by the actuation of a lever, cam or screw,
the half nut, or divided nut with which the vice is fitted is disengaged from the
Bcrew, thereby liberating the sliding or loose jaw which can then be moved to or
from the fast jaw by hand independant of the screw.
In the accompanying drawing Fig. 1 represents a side elevation of a parallel vice
with a portion cut away in order to more clearly shew the interior. According to
this arrangement a screw, (by preference a "buttress" thread slightly undercut on
its vertical face) is used to grip or cramp the material to be worked: the front jaw
and screw travel together. The vice is fitted with a nut N having the upper
portion cut away, and is placed between two vertical lugs A, forming part of bed
plate B. On the underside of the said bed plate is jointed a short lever D that is
in connection with the nut shank N¹, and when the end of the said lever is raised,
the opposite end causes the segment of nut N to lower and disengage from the
screw S, thereby liberating the loose or sliding jaw J, which is then free and can
be moved by hand to or from the fast jaw J¹ so long as the nut N is kept clear of
the screw: but as soon as the lever D is liberated, the spiral spring E raises the
nut into contact with the screw S: the front jaw can then be operated by the vice
lever and screw just the same as in an ordinary vice.
By Figure 2, an arrangement is shewn for operating the nut N which may also
be fitted to the class of vice shewn by Fig. 1, as well as to joiners' vice illustrated
by Fig. 2. By this arrangement a bar K is mounted to the loose jaw plate J, the
said bar extending the length of the screw S and passing through an opening
formed in the shank of nut as shewn by Fig. 3. When the lover L that is secured
to one end of the said bar is moved in one direction, the edge or side of bar K
moves in the direction of the curved arrow 1 thus causing the nut N to lower and
disengage from the screw S thereby liberating the said jaw and allowing it to be
slided as desired. As soon as the lever L is released, the spiral spring E raises the
nut again into contact with the screw: when the vice jaw may be operated by the
screw as before described. In place of the spiral spring E, a spring coiled round
the bar K. or a flat spring may be used, so placed, that it raises the nut into contact
with the screw,
when the lever L has been released as shewn by Figures 10 and 11.

page_text: By Fig. 4 the nut N is placed between two vertical lugs A as before described, and
is hinged to a lever M one end of which is carried by the bed plate B and the other
is operated by a cam P which when turned on its centre by the lever P' in one
direction, causes the nut N to disengage from the screw thereby liberating the loose
or sliding jaw J. When the cam P is turned to its normal position, the nut is
raised by spiral spring E: or the nut and lever may be formed in one piece, and
raised or lowered by a lever or cam. The nut N may also be operated by a screw
through the bed plate as shewn by detail Fig. 5; or by a cam as shewn by Fig. 6.
When a divided nut is used, the same may be actuated to engage with or disengage
from the screw by a cam as shewn by Fig. 7. The cam R is mounted on a pro-
jection on the bed plate B and attached to each side of the same are links L and L'
the former being connected to the bottom half of the nut N and the latter to the
top half N₁. By moving the cam lever R¹, the divided portions of the nut sliding
between the projections or lugs are brought into contact with or disengaged from
the screw S. Or the divided nut may be mounted and operated in a different
manner. Fig. 8 shew's the nut divided in vertical direction jointed or binged in
the centre at N³ the lower portion of each division is cut away and in the recess is
placed a tongue V raised and lowered by a bar K¹ mounted in a similar position
and actuated in the same manner as the bar K shewn by Figures 2 and 3. Or in
place of the tongue V a bar V' (see Figure 9) may be used for operating on the two
portions of the nut which are shewn in contact with the screw.
When the tongue V is raised or the bar V₁ in the position as shewn by the
respective Figs. 8 and 9, the two portions of the nut engage with the screw, but
when the tongue V is lowered or the bar V₁ turned until it is vertical, the flat
springs W at each side cause the nut to disengage from the screw thus liberating
the loose jaw.
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 arrangements of engaging and disengaging the half nuts or segment of a nut.
with the cramping screw of a vice, substantially in the manner and for the purpose
herein shewn and described.