IMPROVEMENTS IN THE METHOD OF AND APPARATUS FOR APPLYING PRESSURE TO PARALLEL VICE
Year: 1877

page_text: LETTERS PATENT to William Smith, David Marks, and William Alfred
Midgley, all of Keighley, in the County of York, Machine Makers, for the
Invention of "IMPROVEMENTS IN THE METHOD OF AND APPARATUS FOR
APPLYING PRESSURE TO PARALLEL VICE."
Sealed the 3rd May 1878, and dated the 6th November 1877.
PROVISIONAL SPECIFICATION left by the said William Smith, David Marks,
and William Alfred Midgley at the Office of the Commissioners of Patents on
the 6th November 1877.
WILLIAM SMITH, DAVID MARKS, and WILLIAM ALFRED MIDGLEY, all of Keighley,
in the County of York, Machine Makers."IMPROVEMENTS IN THE METHOD OF AND
APPARATUS FOR APPLYING PRESSURE TO PARALLEL VICE."
The object of our Invention is to arrange what are commonly known as parallel
vice in such a manner that the operator or workman can slide the loose jaw towards
or from the fast jaw, the distance required to take in between the jaws the material
that is to be operated upon, and to instantly apply the pressure to the jaws, and
secure the material therein quite firm, and thus save a large amount of time that is
lost by the workman having to travel the loose jaw of the vice by means of a screw,
as is the case in common practice.
We accomplish our object in the following manner-We form the fast jaw
casting with a long flange that is secured to the bench in the ordinary manner; at
one end of this flange is the fast jaw which is perpendicular to and at right angles
with the said flange, on the under side of the before-named long flange are two pro-
jections which form a groove or recess, into which we place the body part or slide;
to this slide the loose jaw is cast at right angles and perpendicular to the sliding
plain of the body part, and parallel to the fast jaw. At the top of the before-named
recess is secured to the under side of the long flange, a concave rack or section of
a screwed nut fixed longitudinally and parallel to the sides of the before-named
groove or recess.
In the body part of the loose jaw slide we place a rod or vice spindle, which is free,
and passes longitudinally through the same in line with the before-named concave
rack; at one end of this rod we secure a lever in front of the loose jaw;
the other end of the said rod we secure a segment of a screw, which gears into the
before-named concave rack or section of nut.
at or near

page_text: It will be easily understood that when the segment of the screw is out of gear with
the concave rack or section of nut, the body part of the loose jaw will slide in the
before-named recess; and when the jaws are brought into contact with the material
that is placed between them, and by actuating the before-named lever will cause the
rod to partly revolve, and the segment of the screw to gear into the before-named
concave rack or section of nut, and thus pressure is applied to the material between
the jaws, and made quite secure.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said William Smith, David Marks, and William Alfred Midgley in the
Great Seal Patent Office on the 4th May 1878.
WILLIAM SMITH, DAVID MARKS, and WILLIAM ALFRED MIDGLEY, all of Keighley,
in the County of York, Machine Makers. "IMPROVEMENTS IN THE METHOD OF AND
APPARATUS FOR APPLYING PRESSURE TO PARALLEL VICE."
The object of our Invention is to arrange what are commonly known as parallel
vice in such a manner that the operator or workman can slide the loose jaw towards
or from the fast jaw, the distance required to take in between the jaws the material
that is to be operated upon, and instantly apply the pressure to the jaws, and secure
the material therein quite firm, and thus save a large amount of time that is lost by
the workman having to travel the loose jaw of the vice by means of a screw, as is
the case in common practice.
We accomplish our object in the following manner-We form the fast jaw
casting with a long flange that is secured to the bench in the ordinary manner; at
one end of this flange is the fast jaw, which is perpendicular to and at right angles
with the said flange. On the under side of the before-named long flange are two
projections, which form a groove or recess, into which we place the body part or slide;
to this slide the loose jaw is cast at right angles, and perpendicular to the sliding
plain of the body part, and parallel to the fast jaw at the top of the before-named
recess, is secured to the under side of the long flange a concave rack or segment of a
screwed nut fixed longitudinally with and parallel to the sides of the before-named
groove or recess.
In the body part of the loose jaw slide we place a rod or vice spindle, which is
free, and mounted in journals formed in the body part, and passes longitudinally
through the same in line with the before-named concave rack. At one end of this
rod we secure a lever in front of the loose jaw, and at or near the other end of the
said rod we secure a segment of a screw, which gears into the before-named concave.
rack or segment of nut.
It will be easily understood that when the segment of the screw is out of gear
with the concave rack or segment of nut, the body part of the loose jaw will slide
in the before-named recess; and when the jaws are brought in contact with the
material that is placed between them, by actuating the before-named lever the rod.
will partly revolve, and the segment of the screw will gear into the before-named
concave rack or segment of nut, and draw the loose jaw towards the fast jaw,
and thus pressure is applied to the material between the jaws, and made quite
secure.

page_text: In order that this our Invention may be more fully understood, we will now
describe the same by reference to the accompanying Drawings.
Figure 1 represents the front elevation of our improved vice; Figure 2 is a plan of
the same.
Figure 3 is a front elevation of the fast jaw, and shews the recess in the long
flange.
Figure 4 is a plan of the bottom side of the long flange or fast jaw casting.
Figure 5 is a side elevation of the loose jaw casting.
Figure 6 is a transverse section of Figure 5 through line α, b.
Figure 7 is an enlarged view of the concave rack or segment of nut; Figure 8 is
a section of the same shewing the concavity.
Figure 9.is a section of the segment of a screw which gears into the concave
rack.
Figure 10 is an elevation of the segment of a screw.
In all the Figures similar letters represent similar parts.
The letter A indicates the loose jaw of an improved vice, which is cast to and
forms part of slide B; this slide is fitted into the recess C, formed by the pro-
jections D on the under side of long flange E, which is bolted to the under side of the
bench. At one end of this flange is cast the fast jaw F parallel to the front or loose
jaw. The rod or vice spindle G is carried by suitable journals formed at each'end
of the loose jaw casting; at one end of rod G is secured lever H, and to the other
end is secured the segment of screw J, shewn in Figures 9 and 10; a portion of the
circumference of this screw at K is cut away below the bottom of the threads;
L is a
concave rack or segment of nut, and is secured to the under side of long flange E
between the projections D.
When the lever H is lifted into such a position that the circumference of the
screw at K is opposite the concave rack L, the loose jaw is free to slide in the
recess C, and when material is put between the fast and loose jaws, and the lever H
actuated, the screwed portion J will gear into the teeth of concave rack L, and the
loose jaw will then travel towards the fast jaw, and secure the material therein quite
safe.
Having now described our said Invention, and the manner in which the same is
to be carried into effect, we have to state that we do not restrict ourselves to the
precise details herein described and delineated, but that we believe to be new and
original and claim as the Invention secured to us by the herein-before in part
recited Letters Patent, is the application of a concave rack or segment of a nut in
combination with the segment of a screw for securing materials between the jaws
of vice, substantially in the manner herein-before described, and illustrated upon the
accompanying Drawing.
In witness whereof, we, the said William Smith, David Marks, and William
Alfred Midgley, have hereunto set our hands and seals, this Third day of
May, in the year of our Lord One thousand eight hundred and seventy-
sicht
Signed and Sealed
in the presence of
JOHN WAUGH,
Engineer & Patent Agent,
29, Tyrrel Street,
Bradford.
WILLIAM SMITH.
DAVID MARKS.
(L.S.)
(L.S.)
WILLIAM ALFRED MIDGLEY. (L.S.)