Improvement in Vices.
Year: 1889

page_text: COMPLETE SPECIFICATION.
Improvement in Vices.
I, CLARENCE AUSTIN CHANDLER, of East Bridgewater, in the County of Plymouth
and State of Massachusetts, United States of America, gentleman, do hereby declare
the nature of my invention for IMPROVEMENT IN 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 relates to a vice, the sliding jaw of which is rapidly adjustable
-that is to say, capable of being released so that it can be freely moved toward
and from the fixed jaw independently of the usual means whereby clamping
pressure is applied to and removed from said jaw.
The invention has for its object to provide improved means whereby the sliding
jaw of a vice of this class may be readily made inoperative so that it may be
quickly adjusted, and as readily made operative after adjustment, and to this end
it consists in the improvements which I will now proceed to describe and claim.
Of the accompanying drawings forming a part of this specification, Figure 1
represents a side elevation of a vice embodying my invention. Fig. 2 represents
a longitudinal section of a portion of the same. Fig. 3 represents a section on
line xx, Fig. 2. Fig. 4 represents a perspective view of the gib shown in
Figures and 2. Fig. 5 represents a side view of the nut. Fig. 6 represents a
side elevation, and Fig. 7 a longitudinal section, showing certain differences in
detail hereinafter described. Fig. 8 represents a section on line y y, Fig. 7.
The same letters of reference indicate the same parts in all of the figures.
In the drawings
a represents the fixed jaw and 6 the sliding jaw, the latter being formed on a
hollow shank or slide e which is fitted to move freely in a socket formed in the
fixed jaw.
d represents a screw-threaded rod which is journaled at its ends in
bearings in the shank or slide c, so that it is capable of rotating in said shank
but has no screw connection therewith, and therefore is not moved longitudinally
independently of the shank when rotated. The screw-threaded rod or screw d is
operatively engaged with a nut e within the shank c, said nut being moved longi-
tudinally of the shank by the rotation of the screw d.
represents a rod or arm rigidly attached to an ear or lug g affixed to the
base of the fixed jaw, said lug projecting into the hollow interior of the sliding
shank c. The fixed rod or arm is substantially parallel with the screw d and
passes through a cavity h formed in the nut e at one side of the screw. Said
cavity has an inclined side 2 (Fig. 2), between which and the rod f is interposed
a gib i, the outer or lower side of which is inclined like the side 2 of the said
cavity, while its opposite or inner side fits the under side of the fixed rod or arm f
and is preferably milled or roughened, so that when the gib is pressed against
said rod as hereinafter described, the nut will be locked by the gib to the fixed
rod or arm, and will therefore become fixed so that the rotation of the screw d
in the nut will move the sliding jaw as in ordinary vices; but when the gib is
loosened the nut will be free to slide loosely with the sliding jaw and the screw d,
a rapid adjustment of the sliding jaw being thus permitted.
The gibi is normally held in locking contact with the rod f by a spring j
which, as shown in Figures 1 and 2, is interposed between the nut e and an
arm k on the gib, and is shown in Figures 6 and 7 as supported by the rod f
and bears at one end against an arm k which may be formed on the gib, but is

page_text: shown as hung loosely on the screw d at its upper end and inserted at its lower
end in a slot m in said gib.
When the spring is free to press the arm k in the direction indicated by the
arrow in Fig. 2, it so moves the gib on the inclined side 2 of the cavity in the
nut e as to cause the milled surface of the gib to bear against the fixed rod or
arm and thereby lock the nut e to said rod.
When it is desired to make the nut free to move outwardly on the rod or arm f,
the sliding jaw is moved outwardly by the rotation of the screw in the locked
nut until a stop o, moving with the sliding jaw, comes in contact with the arm k
and through the latter pushes the gib back so as to release it from the fixed
rod f, as shown in dotted lines in Fig. 7. The nut is thus released and the
sliding jaw, screw, and nut are free to slide.
The separation of the gib from the fixed rod is facilitated in the construction shown
in Figures 6 and 7, by springs r interposed between the gib and the upper side of the
cavity in the nut e, said springs acting to press the gib away from the fixed rod.
The stop o may be an arm or cross bar attached to, or formed with, the sliding
shank c, as shown in Figures 1 and 2, or it may be a collar rigidly attached to said
screw, as shown in Figures 6 and 7. In the latter case it is preferable to connect the
arm k loosely with the gib and permit it to tip or be inclined by the pressure of the
spring against its lower end, as shown. I prefer however to make the arm k as a
fixed part of the gib, and to attach the stop o rigidly to the sliding shank c, as shown
in Figures 1 and 2.
Although I have shown the vice jaws formed as in machinists' vices, it is obvious
that they may be of any other desired form.
I prefer to provide the nut e with a projection or snout e', which extends far enough
to the rear of the nut to bear against a flange e² on the rear end of the sliding shank c
when said shank is moved outwardly as is far as desirable, said extension therefore acts
as a stop when the nut is held by the gib, to limit the outward movement of the sliding
jaw.
In the construction shown in Fig. 6 the shank c is provided with projections s to
prevent the shank from being pulled out of the fixed jaw. Said projections may be
the ends of a pin driven through the shank and arranged to abut against the fixed
jaw.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:
1. The combination of the fixed jaw, the sliding jaw having a shank fitted to slide
in the fixed jaw, a screw journaled in the shank of the sliding jaw, a nut within said
shank engaged with said screw, a fixed rod or arm arranged substantially parallel with
the screw, a gib interposed between said rod or arm and a part of the nut, and pro-
vided with a spring supporting arm, a spring interposed between the nut and said arm
whereby the gib is normally engaged with the rod and nut, and a stop which moves
with the sliding jaw whereby the gib may be displaced to release the nut from the
fixed rod, as set forth.
.
2. The combination of the fixed jaw, the sliding jaw and its shank, the screw
journaled in said shank, the loose nut engaged with the screw and provided with a
cavity at one side thereof, the rod or arm affixed to the fixed jaw and passing through
said cavity, the gib located in said cavity at one side of the rod or arin and provided
with an arm k, the spring; interposed between the nut and said arm k whereby the
gib is normally held in engagement with the fixed rod, the stop o moving with the
sliding jaw, and a spring or springs whereby the gib is separated from the fixed
rod when displaced from its normal position, as set forth.
3. The combination of the fixed jaw, the sliding jaw and its shank, the screw

page_text: journaled in the shank, the nut e engaged with the screw and provided with the
extension e¹, and means for locking the nut to the shank and unlocking it there-
from.
בד
11"
تيمم
1
A n 1000
CLARENCE AUSTIN CHANDLER.
Haseltine, Lake & Co.,
45, Southampton Buildings, London, Agents for the Applicant.