Improvements in Pliers and Cutters.
Year: 1892

page_text: Date of Application, 19th July. 1892-Accepter, 20th Aug., 1892
COMPLETE SPECIFICATION.
Improvements in Pliers and Cutters.
1, WILLIAM ALEXANDER BERNARD, of Wooster, corner Wallace Street, City
of New Haven, County of New Haven, State of Connecticut, United States of
America, Manufacturer, do hereby declare the nature of my invention, and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
My invention consists in combining with an open throat and parallel jaw plier a
wire cutter so constructed that enormous compound leverage is brought to bear
with comparatively slight exercise of power, the tool being equally adapted for use
either as a
plier or cutter and the cost being but slightly increased.
With this end in view I have devised the simple and novel construction which I
will now describe, referring by numbers to the accompanying drawing forming part
of this Specification in which:
Fig. 1 is an edge view of my novel tool, the cutter being toward the front;
Fig. 2 a plan view;
Fig. 3 a section on the horizontal plane showing the plier jaws and cutting jaws
in the closed position; and
Fig. 4 is a similar view showing the jaws in the open position.
1 and 2 denote the plier jaws and 3 and 4 the handles. The bases of the jaws
are provided with slots 5. 6 and 6* denote pivots which pass through the opposite
sides of the handles and through these slots. 7 and 8 denote the pivots on opposite
side of the throat which form the main fulcrums of the tool, and 9 and 10 the pivots
which pass through the front ends or operative portions of the handles and through
the jaws. It will be apparent that the object in having separate pivots on opposite
sides of the throat is to leave the throat open. So far as the general operativeness
of the tool is concerned, a single pivot extending from side to side may be used
instead of separate pivots. This being an obvious change, and within the province
of any mechanic, is not deemed to require illustration. 11 and 12 denote the
cutting jaws. Jaw 11 is formed upon the outer face of plier jaw 1, said cutting jaw
lying at an angle to the operative face of the plier jaw. The inuer portion of
cutting jaw 12 is recessed into plier jaw 1, said cutting jaw being provided with a
boss 13 lying in the recess through which pivot 10 passes. The shank 14 of
cutting jaw 12 extends inward, and pivot 8 which connects the handles on that side
passes through it.
A recess 15 is provided in jaw 2 which receives the inner end of
the shank in the closed position as clearly shown in Fig. 3.
The operation of the tool as a cutter will be readily apparent. It will be seen
that power is applied to cutting jaw 12, through its rear fulcrum i.e. pivot 8, and
also to cutting jaw 11 through its rear fulcrum i.e. pivot 6, and that as the cut
proceeds the rear fulcrums of the two cutting jaws move toward each other, that is
approach nearer to an imaginary line extending backward from pivot 10, and lying
midway between the rear fulcrums of the cutting jaws in the open position. The
effect of this movement is to cause the cutting jaws to act with an accelerated or
increased power, so that in use the power is greatest where it is most needed.
It is
obvious that as the cutters go deeper into a wire, the cut is longer and more power
is required to move the jaws. The desired result is perfectly accomplished by the
compound leverage applied through the moving of the rear fulcrums as described.
As a matter of fact heavy wire can he cut with this tool with an even pressure and
with great. case. Much larger wire in fact can be cut with this tool than with any
tool of even size known to the trade.

page_text: 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 with the jaws, handles and pivots 6, 6, 7, 8, 9 and 10 of a
parallel jaw plier, of a cutting jaw 11 formed upon the back of one of the plier
jaws and a cutting jaw 12 pivoted on 10 and having a shank pivoted on 8.
2--The combination with the handles, jaw 2, jaw 1 having a cutter 11 and
pivots 6, 6, 7, 8, 9, and 10, of cutting jaw 12 recessed into jaw 1 and pivoted on 10
and having a shank pivoted on 8.
3 The combination with the handles and jaws 1 and 2 having slots 5, said jaw I
having a cutting edge 11, and jaw 2 having a recess 15, and pivots 6, 6, 7, 8, 9
and 10, of cutting jaw 12 recessed into jaw 1 and having a boss through which
pivot 10 passes and a shank through which pivot passes, the end of said shank in
the closed position lying in recess 15.
Dated this 19th day of July 1892
HERBERT J. ALLISON,
Agent for the Applicant.