Improvements in Reaping Machines.
Year: 1889

page_text: Date of Application, 1st Nov., 1889
Complete Specification Left, 1st Aug., 1890-Accepted, 13th Sept., 1890
PROVISIONAL SPECIFICATION.
Improvements in Reaping Machines.
We, JOHN FAIRBAIRN, Blacksmith of Maxton, St. Boswells, Roxburghshire and
JOHN FAIRBAIRN, Brass Founder of 272 Scotland Street, Glasgow, Lanarkshire, do
hereby declare the nature of this invention to be as follows:-
This invention which relates to reaping machines, has for its object to simplify and
improve the construction of such machines and whilst rendering them more rapid in
action to reduce liability of the parts becoming deranged or being broken.
To that end instead of employing a stationary cutter bar and a single set of movable
knives we provide such machines with two reciprocating knife bars and sets of knives
the said bars being placed the one over the other and so that the upper and lower
knives when operated act in the manner of shears and we effect the reciprocation of
the knife bars by means of links connected to them and to the opposite ends of a beam
lever fixed on a rocking shaft which is actuated from a cam wheel or disc fitted on
the carrying wheel axle of the machine. The cam wheel is formed with a sinuous
groove or ridge around its periphery into or upon which bear friction rollers on the
ends of arms fitted or formed on the shaft which actuates the knife bars and as the
cam rotates the arms are oscillated and impart a rocking motion to the shaft.
Dated this Thirty-first day of October 1889.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.
COMPLETE SPECIFICATION.
Improvements in Reaping Machines.
We, JOHN FAIRBAIRN, Blacksmith, of Maxton, St. Boswells, Roxburghshire and
JOHN FAIRBAIRN, Brassfounder of 272 Scotland Street, Glasgow, Lanarkshire,
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 which relates to reaping machines, has for its object to simplify and
improve the construction of such machines and whilst rendering them more rapid in
action to reduce liability of the parts becoming deranged or being broken.
To that end instead of employing a stationary cutter bar and a single set of movable
knives we construct and provide such machines, as represented in the accompanying
drawings in plan at Figure 1 and in end and front elevations at Figures 2 and 3,
with two reciprocating knife bars and sets of knives A, B, the said bars being placed
the one A, over the other B, and so that the upper and lower knives when operated
act in the manner of shears and we effect the reciprocation of the knife bars A, B, by
means of links C, D, connected at c, d, to them and to the opposite ends e, e¹, of a
beam lever E, fixed on a rocking shaft F, carried in a bracket piece G, on the machine
frame H, and which is actuated from a cam wheel or disc I, fitted on the carrying
wheel axle J of the machine.
The cam wheel 1 is formed with a sinuous groove i, or with a ridge of like
form, around its periphery into or upon which bear friction rollers k, on the ends of
arms K, K, fitted or formed on the shaft F which actuates the knife bars and as the
cam wheel I rotates the arms K K are oscillated and impart a rocking motion to the
shaft F, whereby through the lever E, and links C, D, the knife bars A, B, are
reciprocated.

page_text: Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is :-
1. A reaping machine having its operative parts and cutting mechanism constructed
substantially as herein before described.
2. In a reaping machine the use of two reciprocating knife bars and knives
operating substantially as described.
3. In a reaping machine the cam wheel having a sinuous groove or ridge arranged
to actuate levers connected to operate the reciprocating knife bars substantially as
described.
Dated this Think fund das
T11000
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.