Instantaneous Grip Paralel Vice.
Year: 1894

page_text: Instantaneous Grip Paralel Vice.
JOSEPH CASE, Vice Maker 42 Daniel Hill Sheffield EDWARD KAIN, Engineer
198 Chippinghouse Road Sheffield do hereby declare the nature of this invention to
be as follows:-
A parallel vice to which we have added a rack, lever, and loose nut thereby
providing for an instantaneous action.
Our improvements are, a rack with rising and falling action, working on a pivot
in fast jaw and engaging with teeth in top of nut, the rack being raised by means of
a sliding lever passing through both jaws into slot on back of rack.
A loose nut toothed on top to gear with aforesaid rack, traversed by vice screw
and sliding on parallel bar, attached to loose jaw.
Dated in oond day of May 1804
JOSEPH CASE late of 42 Daniel Hill, Sheffield, Vice Maker, and EDWARD KAIN
late of 198 Chippinghouse Road Sheffield, Engineer, London Works, 82 Bridge
Street, Sheffield, Vice Manufacturers, 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 :-
Our invention relates to vices constructed with a guide bar to ensure parallel
movement of one of the jaws, and has for its object to obtain a quick action
for engaging or releasing an ordinary screw and nut in such manner as to enable an
operator to slide the moving parts inward or outward to any desired extent, without
rotating the screw or other corresponding part, except in respect of the final
pressure necessary to hold the work between the jaws of the vice head.
In carrying our invention into practice for say an ordinary engineers bench vice,
we proceed as follows:-To such a vice we add a toothed rack, having one of its
ends pivotted or otherwise attached to the fast half of the vice head, in such manner :
as to be capable of a limited movement in a vertical direction on the back or at some
other suitable part of this rack, we attach or form, a slotted opening, through
which we pass a lever of sufficient length to pass through the moving half of the vice
head convenient to the user's hand while the opposite end always remains within the
slotted opening, to enable the lever, acting through the pivot of the rack as
a fulcrum to disengage the teeth of the rack from the corresponding teeth formed
upon a loose nut having an internal thread to fit the ordinary vice screw, in lieu of
the ordinary fixed vice box or nut. By means of the engagement of the teeth
formed in the rack with the teeth formed on the loose nut, said nut is held securely

page_text: in any required position, while the rack constitutes a firm abutment upon which
is received the pressure caused by the operation of the screw when applying the
final pressure upon the work.
The vice heads have openings suitably formed to receive all the extra parts as is
well understood. The whole process thus accomplishes what is technically known
as an "instantaneous grip," while the moving jaw may at all times, if desired, be
moved the entire travel by the screw alone as heretofore.
And in order that our invention may be clearly understood, we will now further
explain the same by reference to the accompanying drawings, wherein we illustrate
a convenient form of its application.
Fig. 1. shows face, edge and end views of a toothed rack A, with a slotted
opening K, on the top.
Fig 2. a top and front end view of disengaging lever B.
Fig. 3. is a side elevation of a complete vice partly in section to expose the novel
parts.
Fig. 4. a plan of same, with a portion of cover L removed.
The same letters indicate similar parts in all the figures.
The rack A, is inserted in a suitable opening formed in fixed half of vice jaw F,
and has a vertical motion at its toothed end by reason of being supported by a
pivot or fulcrum J, the disengaging lever B, may be a plain bar corresponding to
the slotted opening K, formed on the rack, the front end is preferably hollowed and
enlarged to correspond to contour of screw D, over which it projects sufficiently to
afford a bearing for a portion of the operators hand when it is desired to lift the
rack out of action or connection with the loose nut C, to enable the moveable half
of the vice head E, to be slipped for any considerable distance, the loose jaw E,
with its guide bar G, the screw D, the nut C, and the lever B, all move together to
the new position on the bed plate H; when on releasing the lever B, the teeth of
the rack A, will automatically engage in the teeth of the nut C, whereupon any
desired increase of gripping force can be applied by rotating the screw D, in the
ordinary way, the rack A, affording the nut C, a firm abutment against the fixed
half of the head F. To again release the grip it is only necessary to turn the
screw D, slightly in the opposite direction, when by pressing upon the lever B, the
rack is again disengaged to allow of vice being instantaneously adjusted to work of
different dimensions. A box cover L is fitted to bed plate to keep all clean.
Our improvement may be varied or modified to suit other styles of parallel vices
without in any way departing from the spirit of our said invention.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
...
1st. The addition to an ordinary parallel vice of a pivotted toothed rack or bar
forming a detent and abutment for a loose screw nut, the application of a loose
screw nut having teeth formed thereon to correspond to teeth in rack, also of
a lever extending through both halves of the vice head and acting upon the rack
for lifting its teeth out of contact with the teeth on the nut when required, all
substantially as described and illustrated.
2nd. The combination, with an ordinary parallel vice of a pivotted toothed rack
operating automatically to fix a screw nut, a lever to suspend the action of the rack
as a detent, and to permit of all the moving parts of the vice being freely slidden
longitudinally in either direction, and on said lever being released thereby securing
an instantaneous action, substantially as described and illustrated.
Dated this 02-1 d SLL
1005
ISAAC BECK,
Certified Patent Agent, and Agent for the Applicants.