IMPROVEMENTS IN HARROWS
Year: 1867

page_text: PROVISIONAL SPECIFICATION left by William Russell Grace at the
Office of the Commissioners of Patents, with his Petition, on the 3rd
August 1867. A communication from abroad by Halsey Haley Monroe,
of Rockland, Maine, United States of America.
I, WILLIAM RUSSELL GRACE, of Brooklyn, New York, United States of
America, now of. Rathdowney, Ireland, do hereby declare the nature of the
said Invention for "IMPROVEMENTS IN HARROWS," a communication, to be as
follows:-
The object of the said improvements, which relate to rotary harrows, is the
construction of an implement. that will not clog or otherwise easily get out
of order, its cost being little, if any, more than an ordinary harrow, while
the amount of work performed thereby in a given time is increased nearly
fourfold:
The said improvements consist chiefly in the employment of a weighted
roller in combination with the draught beam and frame in which the harrow
teeth are secured. The said roller is carried by an arm hinged to the draught
beam, and the harrow frame is arranged to turn upon a central pin or stud
projecting from the said beam which is provided with an antifriction roller
arranged to run upon the top of the frame and keep the barrow level while in
motion. The weighted roller bearing upon the frame causes the teeth of the
harrow to enter the-ground-more deeply on-one-side-of-the-centre of the frame
-than-on-the-other side, and as the harrow is drawn forward-a-rotary or circular
motion is imparted to the said frame around its centre. The frame of the

page_text: said barrow is circular and is composed of an exterior ring of iron, or other
suitable material; the said ring is attached to the extremity of a number of
radial arms, which extend from a common centre concentric with the exterior
ring; these arms may be formed of wood or metal but must be strong enough
to afford a firm support or back for the teeth which are secured to the said
arms. The centre wherefrom the latter radiate is provided with a metal
boss or socket, and this socket is bored to fit a pin or stud projecting at right
angles from the under side of the draught beam which extends across the top
of the frame, the said pin being fixed in the beam and fitted to the socket in
such a manner as to turn freely therein. The horse is attached to one end of
the draught beam whose other end is provided with an antifriction roller or
wheel arranged to run upon the upper surface of the frame. Upon the top
of the draught beam just above the central pin or stud, an arm or rod is
hinged; the outer extremity of this arm is formed with a journal to carry a
roller which is arranged to run upon the upper surface of the outer ring or
other convenient portion of the harrow frame. The joint or hinge whereby
the roller arm is attached to the draught bar or beam allows the said arm to be
adjusted either at a right angle or in any other desired lateral position' with
regard to the said beam, and also allows it to be turned over from one side to
the other of the same. The connection between the arm and beam is also
so arranged that the entire weight of the roller is supported by the surface,
upon which the latter runs and the weight of the roller is properly adjusted
to suit the quality of ground and the work to be performed by the harrow.