IMPROVEMENTS IN VICES.
Year: 1879

page_text: LETTERS PATENT to Herbert John Haddan, of the Firm of Herbert and Com-
pany, Solicitors of Patents, of 67, Strand, in the City of Westminster, Civil
Engineer, for the Invention of "IMPROVEMENTS IN VICES.". A communication
from abroad by Thomas Greenman Hall, of the City of New York, United
States of America.
COMPLETE SPECIFICATION filed by the said Herbert John Haddan at the
Office of the Commissioners of Patents on the 25th September 1879.
HERBERT JOHN HADDAN, of the Firm of Herbert and Company, Solicitors of
Patents, of 67, Strand, in the City of Westminster, Civil Engineer. " IMPROVE-
MENTS IN VICES." A communication from abroad by Thomas Greenman Hall, of
the City of New York, United States of America.
This Invention relates to that class of vices provided with adjustable faces; it has
for its object to render said faces capable of ready attachment to the jaws, easy in
their movements of adjustment, and strong in their bearings; and with these ends
in view the Invention consists in forming the jaws of the vice with longitudinal
semi-cylindrical ribs, and securing to said jaws by end ears self adjusting face plates
having semi-cylindrical grooves in their upper sides adapted to lie over the ribs on
the vice jaws, as will be hereinafter more fully set forth. In the Drawing Fig. 1
is an elevation and partial section of a vice embodying the present Invention; and
Fig. 2 is a sectional portion on the line x, x, of Fig. 1. Similar letters indicate like
parts of both, Figure A is the vice, of the ordinary hand order; b, b, are the jaws,
pointed at c in the usual manner. The jaws are operated through the medium of
an ordinary screw d and butterfly-nut e, a spring g being interposed between the
jaws for an obvious purpose. The inside faces of the upper termini of the jaws b, b,
are formed with longitudinal semi-cylindrical ribs k, the metal each side of the
ribs k being cut at an angle to a line drawn from the axis of motion of the jaws
through the centre of the pivot screws i in order that the face plates may vibrate
to adjust themselves to the work confined between them; and the ends of the jaws
are bored and screw tapped a suitable depth at a point which is the true centre of
the arc of the rib k to receive the threaded ends of screws i which pass through end
ears h formed on self-adjusting face-plates f. These face-plates ƒ are formed with

page_text: "
semi cylindrical grooves in their rear sides adapted to surround the ribs k on the
jaws; and the end ears h are bored so as to permit the passage of the screws i.
The holes in the ears h are sufficiently large to permit the heads of the securing
screws to pass into the same and serve as the pivot upon which said face plates
vibrate, and so that the said ears will not be bound against the ends of the jaws.
A spring may be applied as shown to keep the upper edges of the face plates
pressed backwardly at their upper edges. It will be observed that while the
screws i serve as the pivots upon which the plates f vibrate, the ribs k and corre-
sponding grooves in the plates serve as auxiliary pivots, and at the same time
support and stiffen the face-plates through their whole length: One is aware that
it is not new broadly to provide a vice with adjustable jaws or face plates, and
does not wish to be understood as making any such claim, but what is claimed and
desired to secure by Letters Patent is,-
A vice having the upper ends of its jaws formed with longitudinal ribs k, the
metal above and below said ribs being cut on an angle and with their ears tapped,
as described, in combination with the face plates f provided with semi-cylindrical
grooves and end ears; the face plates and jaws being secured in operative relation
by screws in the manner and for the purpose set forth.
In witness whereof, I, the said Herbert John Haddan, have hereunto set my
hand and seal, this Twenty fifth day of September, A.D. 1879.