AN IMPROVED CUTTER BAR FOR MOWING MACHINES
Year: 1884

page_text: PROVISIONAL SPECIFICATION.
I, ALEXANDER MELVILLE CLARK, of the firm of A. M. and Wm. Clark, of
53, Chancery Lane, in the County of Middlesex, Fellow of the Institute of Patent
Agents, do hereby declare the nature of the said Invention for AN IMPROVED
CUTTER BAR FOR MOWING MACHINES, a communication to me from abroad by
Lawrence Persius Roys of Nicholville, Saint Lawrence County State of New York
United States of America, Clerk, to be as follows:-
The object of this invention is to provide a new and improved cutter bar for
mowing machines in which the knives only shall be liable to wear off and in
which the knives shall not be apt to become clogged.
The finger bar is provided with the usual guards which are tapered towards
their outer ends and have their bottoms curved slightly upward and outward from
the inner ends to the points and are provided with the usual transverse horizontal
slots.
On the finger bar a bar is held to which a series of triangular teeth or blades of
the usual construction are secured the teeth projecting into the slots in the fingers
and being held centrally thereunder. The edges of these teeth are bevelled
outward from the bottom surface to the top so that the upper parts of the
edges cut.
On this bar a second bar slides longitudinally in guides and from the latter bar
project teeth or blades which are of the same shape and size as the first set but
have their edges bevelled out from the top to the bottom surfaces.
The bottom surfaces of the second set of teeth rest against and slide on the upper
surfaces of the first set and do not come in contact with the fingers or with other
parts of the cutter bar. The grass etc: is cut between the two sets of blades, the
fingers and the guides holding the two knife bars and the knives on the same in
their proper relative positions.

page_text: ">
I, ALEXANDER MELVILLE CLARK, of the firm of A. M. and Wm. Clark, of
53, Chancery Lane, in the County of Middlesex, Fellow of the Instituto of Patent
Agents, do hereby declare the nature of tho said Invention for "AN IMPROVED
CUTTER BAR FOR MOWING MACHINES (a communication to me from abroad by
Lawrence Persius Roys of Nicholville, St. Lawrence County New York, United
_ States of America, Clerk), and in what manner the same is to be performed, to be
particularly described and ascertained-in-and by the following statement :-
The object of this invention is to provide a new and improved cutter bar for
mowing machines in which the knives only shall be liable to wear off and in which
the knives shall not be apt to become clogged.
Reference is to be had to the accompanying drawings forming part of this
specification in which similar-letters of reference indicate corresponding parts in
both the figures.
Figure 1 is a plan view of the improved cutter bar.
Figure-2-is-an-end view of the same.
From the finger bar A, a series of guards or fingers-B,-project about horizontally,
which fingers are tapered toward their outer ends and have their bottoms curved-
slightly upward and outward from the inner ends to the points.
The said fingers are provided with the usual transverse horizontal slots C, through
which the knives can pass.
On the bar A, a bar D is held to which a series of triangular teeth or blades E,
of the usual construction are secured, the teeth projecting into the slots in the
fingers and being held centrally thereunder. The edges of the teeth are beveled
outward from the bottom surface to the top so that the upper parts of the
edges cut.
On the bar D a bar F is held to slide longitudinally by guides G and from the
bar F, teeth or blades H project which are of the same shape and size as the teeth
or blades E but have their edges beveled out from the top to the bottom surfaces.
The bottom surfaces of the teeth H, rest against and slide on the upper surfaces
of the teeth E, and do not come in contact with the fingers or with other parts of
the cutter bar. The grass etc. is cut between the two blades E and H, the fingers B,
and the guides G, holding the two knife bars and the knives on the same in their
proper relative positions.
The cutter cannot be clogged by grass etc. and the parts do not wear off as
rapidly as in ordinary cutter bars and need not be sharpened as often.
As the teeth or knives E and H are secured to the bars D and F they can easily
be removed from the bar A, for grinding and sharpening.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what
I claim is
1 A cutter bar for mowing machines provided with two sets of knives or teeth,
substantially as herein shown and described,

page_text: 2nd A cutter bar for mowing machines provided with a fixed set of knives or
teeth and a reciprocating set of knives or teeth, substantially as herein shown
and described.
3rd A cutter bar for mowing machines provided with a fixed set of teeth or
knives, and a movable set of teeth or knives, the movable knives or teeth resting
on the fixed teeth, substantially as herein shown and described.
4th In a cutter bar for mowing machines the combination with the bar A, of the
bar D, held rigidly on the same, the teeth or knives E, on the same, the sliding
bar F on the bar D, and the teeth or knives H on the bar F, substantially as herein
shown and described.
5th In a cutter bar for mowing machines, the combination with the bar D, A of
the two sets of teeth or knives E, H, and of the guards or fingers B, substantially
as herein shown and described.
6th In a cutter bar for mowing machines, the combination with the bar A, and
guards or fingers B, of the bottom knives or teeth E having their edges beveled
outward and upward and the knives or teeth H having their edges beveled
downward and outward, substantially as herein shown and described.

page_text: I, ALEXANDER MELVILLE CLARK, of the Firm of A. M and Wm Clark, of
53 Chancery Lane in the County of Middlesex, Fellow of the Institute of Patent
Agents, seek leave to amend the specification of my application for Letters Patent,
No. 11,546 of 1884, as shown in red ink in the copy of the original complete
specification hereunto annexed by striking out the word "mowing" and inserting
the words "for cutting grass and other crops" after the word "machines" in the
title, and wherever that word occurs in the Specification and claims viz at page 1
lines 4 and 8, page 2 lines 4, 9, and 41, pago 3 lines 1, 4, 7, 11 and 14, of the Queen's
Printer's copy.
My reasons for making this amendment are as follows:-that the cutter bar
described shown and claimed appertains to a machine for cutting grass and corn
crops and the specification refers to other crops as well as grass but the word
"mowing" alone might by conventional usage lead to the supposition that grass is
the only crop that can be cut by it.

page_text: In the matter of the application made by Alexander Melville Clark for leave to
amend the Specification filed in pursuance of the application for Letters Patent
N° 11,546 of 1884.

page_text: I, ALEXANDER MELVILLE CLARK, of the firm of A. M. and Wm. Clark, of
53, Chancery Lane, in the County of Middlesex, Fellow of the Institute of Patent
Agents, do hereby declare the nature of the said Invention for AN IMPROVED
CUTTER BAR FOR MOWING MACHINES, a communication to me from abroad by
Lawrence Persius Roys of Nicholville, Saint Lawrence County State of New York,
United States of America, Clerk, to be as follows:―
The object of this invention is to provide a new and improved cutter bar for
mowing machines in which the knives only shall be liable to wear off and in
which the knives shall not be apt to become clogged.
The finger bar is provided with the usual guards which are tapered towards
their outer ends and have their bottoms curved slightly upward and outward from
the inner ends to the points and are provided with the usual transverse horizontal
slots.
On the finger bar a bar is held to which a series of triangular teeth or blades of
the usual construction are secured the teeth projecting into the slots in the fingers
and being held centrally thereunder. The edges of these teeth are bevelled
outward from the bottom. surface to the top so that the upper parts of the
edges cut.
On this bar a second bar slides longitudinally in guides and from the latter bar
project teeth or blades which are of the same shape and size as the first set but
have their edges bevelled out from the top to the bottom surfaces.
The bottom surfaces of the second set of teeth rest against and slide on the upper
surfaces of the first set and do not come in contact with the fingers or with other
parts of the cutter bar. The grass etc: is cut between the two sets of blades, the
fingers and the guides holding the two knife bars and the knives on the same in
their proper relative positions.
30

page_text: 2nd A cutter bar for mowing machines for cutting grass and other crops provided
with a fixed set of knives or teeth and a reciprocating set of knives or teeth,
substantially as herein shown and described.
3rd A cutter bar for mowing machines for cutting grass and other crops provided
with a fixed set of teeth or knives, and a movable set of teeth or knives, the
movable knives or teeth resting on the fixed teeth, substantially as herein shown
and described..
4th In a cutter bar for mewing machines for cutting grass and other crops the
combination with the bar A, of the bar D, held rigidly on the same, the teeth or
knives E, on the same, the sliding bar F on the bar D, and the teeth or knives H
on the bar F, substantially as herein shown and described.
5th In a cutter bar for mowing machines for cutting grass and other crops the
combination with the bar D, A of the two sets of teeth or knives E, H, and of the
guards or fingers B, substantially as herein shown and described.
6th In a cutter bar for mowing machines for cutting grass and other crops the
combination with the bar A, and guards or fingers B, of the bottom knives or
teeth E having their edges beveled outward and upward and the knives or teeth H
having their edges beveled downward and outward, substantially as herein shown
and described.
.