Improvements in Shears for Cutting Metal.
Year: 1897

page_text: Improvements in Shears for Cutting Metal.
-
I, WILLIAM KIMBERLEY, of Highgate Tool Works, Emily Street, Birmingham,
Manufacturer, do hereby declare the nature of this invention to be as follows:-
This invention relates to shears such as are screwed to a bench or block or are
held in a vice or otherwise fixed conveniently for the work. These improved
shears are designed for cutting plate and bar, or rod metal and are made of different
sizes. They consist of a pair of blades or jaws of the usual kind pivoted together
and actuated by a lever handle to which they are connected by a series of short
levers and links arranged to increase the power of the lever handle over the cutting
jaws and cutters. One end of the lever handle is fulcrummed by a pivot joint to
a metal block suitable for being held in a vice. This block has a screwed tail
adapted for fixing in a bench. On the other side of the block is a pivot joint
connecting it to the back end of the lower jaw. The upper jaw is pivoted to one
end of a triangular rocking lever the fulcrum of which is a pivot joint on the block
aforesaid.
The end of this rocking lever is connected by a nearly vertical link or links to
the lever handle at a short distance from its fulcrum. The handle being depressed
pulls down the vertical links which draw with them the outer end of the rocking
lever, thus tilting the inner end which being pivoted to the back end of the upper
jaw causes the fore end of it to be depressed and to close on the lower jaw thus
effecting the cut.
At the same time the lower jaw is also caused to approach the
upper jaw by the same action which raises the pivot joint connecting it to the
upper jaw.
The cutters for cutting rod and bar metal are placed behind the fulcrum of the
rocking lever, one of them being attached to the underside of the back arm of this
lever and the other placed on the upper surface of the block. Stop pins prevent
any overstraining of the parts when the cut is effected.
n1 141.
Ontation 1907
Improvements in Shears for Cutting Metal.
I, WILLIAM KIMBERLEY, of Highgate Tool Works, Emily Street, Birmingham,
Manufacturer, do hereby declare the nature of this invention and in what manner.
[Price 8d.1

page_text: the same is to be performed, to be particularly described and ascertained in and
by the following statement:-
This invention relates to shears such as are screwed to a bench or block, or are
held in a vice or otherwise fixed conveniently for the work. These improved
shears are designed for cutting plate and bar, or rod metal and are made of different
sizes. They consist of a pair of blades or jaws of the usual kind pivoted together
and actuated by a lever handle to which they are connected by a series of short
levers and links arranged to increase the power of the lever handle over the cutting
jaws and cutters. One end of the lever handle is fulcrummed by a pivot joint to
a metal block or base suitable for being held in a vice or fixed to a bench.
This block may have the usual slightly tapering square shank and this shank
may terminate in a screwed tail adapted for fixing in a bench. On the other side
of the block is a pivot joint connecting it to the back end of the lower jaw. The
upper jaw is pivoted to the far end of a triangular shaped rocking lever the ful-
crum of which is a pivot joint on the aforesaid base; the near end of this rocking
lever is connected by a nearly vertical link or links to the lever handle at a short
distance from its fulcrum. The handle being depressed pulls down the vertical
links which draw with them the near end of the rocking lever thus tilting the
far end which being pivoted to the back end of the upper jaw causes the fore end
of it to be depressed and to close on the lower jaw, thus effecting the cut.
At the same time the lower jaw is also caused to approach the upper jaw by the
same action which raises the pivot joint connecting it to the upper jaw.
The cutters for cutting rod and bar metal are placed behind the fulcrum of the
rocking lever, one of them being attached to the underside of the back arm of this
lever and the other placed on the upper surface of the block. Stop pins prevent
any overstraining of the parts when the cut is effected.
I will now describe the invention with reference to the accompanying drawings,
in which:-
Fig. 1 shows a perspective elevation of a pair of bench shears constructed on
my improved system. A is a foundation which is fixed to a workshop bench by
the screwed tail A¹, or can be held in a vice, B is the lever handle, fulcrummed to
the foundation at C, D, D, are link plates pivoted to the lever handle B, and the
rocking lever F. The rocking lever F is fulcrummed to the foundation A, at E,
J, are the cutting blades which are pivotted together at K, and one being also
pivoted at L to the rocking lever F, and the other to the foundation A, at M.
By pressing down the lever handle B, the link plates 1), D, draw down the near
end of the rocking lever F, and this movement raises the far end of same and
causes the upper cutting blade J, which is pivoted at L, to be depressed at its point.
The upward action of the far end of the rocking lever F draws the pivot joint K
upwards and makes the lower cutting blade J, turn on its pivot M, thus causing
it to rise and meet the upper blade, thereby effecting the required shearing action.
H, H', are a pair of auxiliary cutting jaws mounted one in the under side of
the rocking lever F, and the other attached to the upper end of the foundation A.
To prevent them from coming together and injuring the cutting edges they are
each provided with a stop G, which projects slightly beyond the jaws and thus pre-
vent their touching when the shears are operated.
Having now particularly described and ascertained the nature of my said in-
vention, and in what manner the same is to be performed, I declare that what I
claim is:-
1. In a shears for cutting metal and like purposes the arrangement of links
and levers for operating the jaws, as herein described and set forth.
2. In a shears for cutting metal and like purposes, the combination of a base,
a rocking lever fulcrummed thereon, operating front jaws, and with or without
a rod cutter behind its fulcrum, with the necessary links and lever handle, as herein
described and set forth.

page_text: 3. In a shears for metal and the like, the base A, rocking lever F, jaws J, J¹,
and H, H', handle lever B, and links, D, D, as herein described and set forth.
Dated this 27th day of November 1897.
S. S. BROMHEAD,
Patent Agent, 171, Queen Victoria Street, London, E.C.