Improvements in Cutters for Bolts and the like.
Year: 1895

page_text: Date of Application, 23rd Aug., 1895-Accepted, 28th Sept., 1895
COMPLETE SPECIFICATION.
Improvements in Cutters for Bolts and the like.
I, CYRUS SUMNER HILL, of Rochester, in the County of Strafford, and State
of New Hampshire, United States of America, Gentleman, 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 bolt-clippers, and it has for its object to provide a tool
of this character that shall possess simple and efficient means for exerting a
powerful cut on the bolt or rod operated upon, while at the same time being
comparatively simple in construction and operation.
With these and other objects in view which will readily appear as the nature
of the invention is better understood, the same consists in the novel construction
combination and arrangement of parts hereinafter more fully described, illustrated
and claimed.
In the accompanying drawings,
Figure 1 is a side elevation of a pair of bolt-clippers constructed in accordance
with this invention.
Fig. 2 is a central longitudinal sectional view thereof showing the cutter jaws
open.
Fig. 3 is a detail in perspective of the sliding cutter-jaw.
Fig. 4 is a similar view of the stationary or fixed cutter-jaw.
Referring to the accompanying drawings, 1 designates a bifurcated tool-head
essentially comprising the parallel head-plates 2, connected at one edge by the
intermediate bridge-piece 3. The said bifurcated tool-head 1, has removably
clamped therein between the plates 2 the stationary or fixed cutter-jaw 4.
said stationary or fixed cutter-jaw 4 is made of a suitable length of cast-steel and
is provided with the bolt openings or holes 5 to receive the bolts 6 that removably
secure the jaw within the head.
The
The stationary or fixed cutter-jaw 4 is formed at one end into the beveled
blade 7 that is projected beyond one end of the tool-head and is provided with a
sharpened cutting edge 8 that is disposed at an angle or inclination to the longi-
tudinal center of the tool-head and mounted to slide on the stationary or fixed
of the tool-
cutter-jaw 4 between the same and the intermediate bridge-piece
head is the sliding cutter-jaw 9. The sliding cutter-jaw 9 is also made of cast
steel and is provided at that end which works in opposition to the blade 7 of the
jaw 4 with the beveled cutter-blade 10 that is reversely beveled to the blade 7 and
is provided with an inclined cutting edge 11 that is formed parallel with the
cutting edge 8 of the stationary or fixed jaw so that as the jaw 9 is slid back and
forth it will be obvious that the relation of the cutting edges 8 and 11 will produce
a "draw cut" which provide for the severance of a bolt or rod much more quickly
and with less injury to the tool than & "direct" cut. The sliding cutter-jaw 9 is
maintained close against the stationary or fixed cutter-jaw and the wear thereof
also compensated for by means of the steel washer-plate 12 that is interposed
between one side of the sliding jaw and the intermediate bridge-piece 3 of the
tool-head, and a set screw 13 is mounted in a threaded opening 14 in said bridge-
piece and impinges on the washer-plate 12 to hold the same against the said sliding
jaw to take up the wear and also to hold the same steady, and a jam-nut 15
working on the screw 13 locks the same in its adjusted position.

page_text: The sliding cutter-jaw 9 has projected from the inner end thereof the double
rack-bar 16 with the teeth on both sides of which mesh the pinion segments 17
formed on the inner ends of the operating levers 18.
The said operating levers 18 are removably and pivotally mounted within the
tool-head 1 at their inner ends on the pivot-bolts 19 and in their pivoted ends the
said levers are provided with the oil-holes 20 which lead to the bolts 19 so that
the bearings of said levers may be lubricated from time to time.
The operating levers 18 are of any desired length and at a point intermediate
of their ends are provided with the threaded sockets or openings 21 that receive
the adjustable set-screws 22 which are directly opposed to each other and when the
levers are closed are adapted to contact to limit the inward motion of the levers and
therefore the outward movement of the sliding cutter-jaw which may be regulated
by adjusting the said screws.
From the above the operation and advantages of the herein-described bolt-
clippers will be readily apparent to those skilled in the art, and it will be under-
stood that changes in the form, proportion and the minor details of construction
may be resorted to without departing from the principle or sacrificing any of the
advantages of this invention.
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. In a bolt-clipper, a bifurcated tool-head consisting of parallel head plates
and an integral bridge-piece connecting said parallel plates at one edge, a stationary
cutter jaw fitted between the parallel plates of the tool head and provided at one
end with a beveled blade having an inclined cutting edge, bolts removably fastening
the stationary cutter jaw within the tool head, a sliding cutter jaw mounted to slide
on the stationary cutter jaw between the latter and the bridge piece of the tool head,
said sliding jaw being provided at one end with an integral blade beveled reversely
to the blade of the stationary jaw and having an inclined cutting edge opposed to
and parallel with the cutting edge of said stationary jaw, means for taking up the
wear of the sliding cutter jaw, and means for sliding said sliding cutter jaw within
the tool head, substantially as set forth.
2. In a bolt clipper, a bifurcated tool head a stationary cutter jaw removably
held within said head and provided at one end with a cutting blade, a sliding
cutter jaw working within said head and provided at one end with a blade opposed
to that of the stationary jaw, a washer plate interposed between the sliding jaw
and one side of the tool head, a set screw mounted in the tool head and working
against said washer plate and operating levers pivotally mounted at one end in
said tool head and connected with said sliding jaw, substantially as set forth.
Dated this 23rd day of A wrust 1805
BOULT & WADE,
Agents for the Applicant.