Improvements in Parallel Vices.
Year: 1892

page_text: Date of Application, 24th Mar., 1892
Complete Specification Left, 28th Sept., 1892-Accepted, 12th Nov., 1892
Improvements in Parallel Vices.
I, WILLIAM WHITEHEAD, of 104, Moss Lane West, Moss Side, Manchester,
in the County of Lancaster, Electrical Engineer, do hereby declare the nature of
this invention to be as follows:-
:-
This invention relates to improvements in parallel vices and has for its object to
provide means whereby the grip of the jaws is rendered more rapid and secure and
the vice in itself less liable to get out of order being screw and spring less.
To this end I employ as usual a stationary and a inovable jaw. The stationary
or back jaw I form with a hollow body open at its base and ends, which I fix to a
plate having ratchet teeth projecting above the base of the said hollow body. Into
this hollow body I fit a hollow shank rendered adjustable therein on the outer end
of which is adapted to slide the front movable jaw, hitherto forming part of the
said hollow shank. In each end of this hollow shank I mount a spindle passing
through the same and adapted to be rotated and to carry a rack having two lugs
and fitted into the said hollow shank, which rack, in length about equal to the
aforesaid stationary rack, is adapted to be raised and lowered by the said spindle
and thus brought in and out of gear with the said stationary rack. For this
purpose I form the said spindle cam shaped, say, near each end and between
the said lugs, which cam shaped portions have an angular position of about
120 degrees.
The outer cams are respectively adapted to operate in a square hole formed in
the said rack lugs and thereby raise the latter out of gear whilst the inner cam
serves to press on the said rack and thus hold it firmly in gear with the stationary
rack, on the aforesaid spindle receiving a third of a turn.
The front of the said spindle is formed with a shoulder or disc and eye, which
latter receives the sliding pin as usual. The inner face of the said shoulder or disc
I form with a double incline adapted to operate against another similar double
incline formed in the front of the said sliding front jaw and thus displace and force
the latter home on its shank, on the aforesaid spindle being turned by its pin.
During the first part of the turn of the spindle the respective cams lower and
hold firmly the movable rack in gear with the stationary rack, thus locking the
hollow shank in position, whilst the sliding front jaw is forced home by the said
inclines. On the return movement of the aforesaid spindle its end cams lift the
movable rack out of gear with the stationary rack and thus permit the longitudinal
adjustment of the hollow shank aforesaid.
In order to prevent the loose jaw sticking on the return movement of the cam
spindle, the highest points of the aforesaid inclines are formed dovetail or nose
shaped, so as to engage each other and thus tie the sliding front jaw and hollow
shank together longitudinally.
Dated this 23rd day of March 1892.
F. BOSSHARDT & Co.,
Agents to Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in Parallel Vices.
I, WILLIAM Whitehead, of 104, Moss Lane West, Moss Side, Manchester,
in the County of Lancaster, Electrical 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 :-
This invention relates to improvements in parallel vices and has for its object to
provide means whereby the grip of the jaws is rendered more rapid and secure and
the vice in itself less liable to get out of order, being screw and spring less.
And in order that my invention may be more fully understood I have caused to
be appended hereunto one sheet of drawings marked with letters of reference
indicating like parts in the various figures.
Fig. 1 is a side view, Fig. 2 a front view and Fig. 3 a longitudinal section of a
parallel vice constructed in accordance with my invention.
Fig. 4 is a front view of the vice with spindle removed.
Figs. 5 & 6 are cross sections at lines A-B showing respectively, the rack out
of and in gear.
Figs. 7 & 8 are side views of the front portion of the vice, showing two modifica-
tions of my invention.
In carrying out my invention and referring to Figs. 1, 2, 3, 4, 5 & 6, I employ
as usual a stationary and a movable jaw a & b respectively. The stationary or
back jaw a I form with a hollow body a' open at its base and ends, which body a¹ I
fix to a plate c having ratchet teeth c¹ projecting above the base of the hollow
body a'. Into this hollow body a' I fit a hollow shank d having a partition d²,
closed ends d and rendered adjustable therein, on the outer end of which shank is
adapted to slide the front movable jaw b, hitherto forming part of the hollow
shank d. The hollow shank d, see Fig. 3, is furnished with a stud d³ projecting
into a groove b¹ formed in the hollow body a' of the stationary jaw a, which serves
to limit the outward movement of the hollow shank d. In each end of the hollow
shank d I mount a spindle e passing through the same and adapted to be partially
rotated and to carry and operate a rack f, having two lugs fi and fitted into the
hollow shank d. The spindle e is longitudinally kept in position by reducing and
furnishing its back end with a washer e' rendered fast thereon and a nut e². The
rack is in length about equal to the stationary rack c¹ and adapted to be raised
and lowered by the spindle e and thus brought in and out of gear with the stationary
rack c'. For this purpose I form the spindle e cam shaped, say near each end e³
and at the part e between the lugs f¹, which cam shaped portions e³ & et have an
angular position of about 120 degrees. By preference I form the portion e
between the lugs f¹ concentric with the spindle e and with a flat e see Figs. 5 & 6,
which allows the rack f to be raised out of gear by the cams e³ instantly. The
latter are respectively adapted to operate in a square hole or to ensure a very rapid
action, preferably in a round one f having a recess f³, as shown Figs. 5 & 6, formed
in the rack lugs f¹ and thereby raise the latter out of gear, see Fig. 5, whilst the
inner cam e¹ serves to press on the rack f and thus hold it firmly in gear with the
stationary rack c¹, on the spindle e receiving a partial turn, see Fig. 6.
The front of the spindle e is formed or furnished with a shoulder or disc g and
eye g', which latter receives the sliding pin as usual, or a handle h, solid therewith,
or screwed to it, as shown in Fig. 2. The inner face of the shoulder or disc g, I
form with a double incline g³, see Figs. 1 & 4, or with a single incline, as shown in
Fig. 8, adapted to operate against another disc g³ having a similar double or single
incline on the front of the sliding front jaw b and thus displace and force the latter
home on its shank d, on the spindle e being turned by its pin or handle h.
During the first part of the turn of the spindle e the cams e lower and the cam e
holds firmly the movable rack f in gear with the stationary rack c', thus locking the

page_text: hollow shank & in position, whilst the sliding front jaw b is forced home by the
inclines g. On the return movement of the spindle e its end cams e lift the movable
rack out of gear with the stationary rack c¹ and thus permit the longitudinal
adjustment of the hollow shank d.
In order to prevent the loose jaw b sticking on the return movement of the cam
spindle e, the highest points of the inclines are formed dovetail or nose shaped,
as shown in Fig. 7, so as to engage each other and thus tie the sliding front jaw b
and hollow shank d together longitudinally. For the purpose of protecting the
incline or inclines 92 from foreign matter I fix around the same a cover i, as shown
in dotted lines Fig. 1, having a stud or studs i adapted to engage a groove or
grooves in the disc g, which also serves to tie the two discs g g³ together in lieu
of the dovetail projection shown in Fig. 7.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim, is-
"In parallel vices."
1st. The general construction and combination of parts constituting my improve-
ments operating substantially as and for the purpose set forth.
2nd. The spindle e formed with cam shaped parts and carrying the rack f
adapted to lower and retain the rack fin gear with the stationary rack plate c and
raise it out of the same on the spindle e receiving a partial turn, substantially as
and for the purpose set forth.
3rd. The spindle e having at its front end a disc g, the inner face of which is
formed with a single or double incline g² in combination with another disc 9' secured
to or forming part of the loose jaw b and having a similar incline or inclines g
which in contact with each other force the loose jaw 6 home on the spindle e being
partially rotated, substantially as and for the purpose set forth.
Dated this 27th day of September 1892
F. BOSSHARDT & Co.,
4, Corporation Street, Manchester, Agents to Applicant.