Improvements in Harrows.
Year: 1895

page_text: PROVISIONAL SPECIFICATION.
Improvements in Harrows.
I THOMAS GRIFFIN, of Coolfancy, Rasnastraw, Tinahely, Co. Wicklow,
Ireland, Farmer, do hereby declare the nature of this invention to be as follows:
This invention relates to improvements in harrows and in accordance therewith
I produce a harrow of exceedingly simple and durable construction, capable of
convenient manipulation, and of being readily set and effectively used for properly
preparing and dressing the surface of lea or stubble land for green crops and the
like and thereby dispensing with the at present existing necessity of light
ploughing.
The harrow constructed in accordance with this invention consists of a
rectangular frame upon the front and rear cross-bars of which are mounted a.
convenient or suitable number of tines or teeth. The frame of the harrow carries
a longitudinal central bar or reach to the forward end of which is attached the
draft-link and upon which in a suitable position is mounted a single front wheel.
Journaled upon the frame I have an axle having end cranks upon which are
mounted the rear wheels. The drivers seat may conveniently be fitted upon one
side of the frame of the harrow.
The adjustment and regulation of the depth at which the tines or teeth are to
run can be quickly and accurately accomplished by means of a vertical lever
mounted upon the axle of the machine (controlled by means of a pawl and rack)
and connected by means of a connecting rod with the forward end of the reach.
By throwing the lever one way the frame is raised, and by reversing the lever the:
whole is lowered, thus easily and accurately effecting any desired adjustment.
D-11-
A 190K
HUGHES, SON & Co.,
38, Chancery Lane, W.C., Agents for the Applicant.
Improvements in Harrows.
I THOMAS GRIFFIN, of Coolfancy, Rasnastraw, Tinahely, Co. Wicklow,
Ireland, Farmer, 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 improvements in harrows, and in accordance therewith
I produce a harrow of exceedingly simple and durable construction, capable of
convenient manipulation, and of being readily set and effectually used for properly
preparing and dressing the surface of lea or stubble land for green crops and the
like, and thereby dispensing with the at present existing necessity of light
ploughing.
And in order that this my invention may be fully understood, I will describe
same with reference to the accompanying sheet of drawings upon which is
represented in Figs. 1 and 2 respectively a plan view and a side elevational view
•
11

page_text: of the harrow constructed in accordance therewith. Similar letter
indicate like parts in both figures.
Reference
The harrow consists of a rectangular frame a a¹ upon the front and rear
cross-bars a¹ of which are mounted a convenient or suitable number of tines or
teeth b b¹.
The frame of the harrow carries a longitudinal central bar or reach c, to the
forward end of which is attached the draft-link d, and upon which, in a suitable
position, is mounted a single front wheel e.
Journalled upon the frame I have an axle f having end-cranks f¹ upon which
are mounted the rear wheels 9.
A seat for the driver may conveniently be fitted upon one side of the frame of
the harrow.
The adjustment and regulation of the depth at which the tines or teeth are to
run can be quickly and accurately accomplished by means of a vertical lever h
fixed upon the axle f of the machine (controlled by means of a pawl i and rack i¹).
By throwing the lever h one way, the frame a a' is raised, and by reversing the
lever the whole is lowered; thus easily and accurately effecting any desired
adjustment. To move the lever h the pawl is withdrawn from the hole in rack
in which it may then be & as the lever is drawn over said pawl i may be inserted
in any required hole in the rack.
For instance, by throwing the lever-say to the rear-the axle f is partly
revolved and the cranks f¹ are dropped downwardly, thus lifting or raising the
rear end of the harrow.
By reversing the lever h the whole frame may be lowered.
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. The improvements in harrows, substantially as, and for the purposes, herein-
before described.
2. In harrows, the rectangular frame a a¹ having tines or teeth b 6 upon the
front and rear cross-bars a¹ of the frame; the longitudinal central bar or reach o
having draft link d and wheel e at its forward end; the axle fjournalled upon
frame and having end cranks f¹ upon which are mounted the rear wheels g; & the
vertical lever mounted upon the axle (controlled by pawli and rack); all
constructed, combined, and operating, substantially as hereinbefore described and
shewn.
Dated this 23rd day of January 1896.
HUGHES, SON & Co.,
38 Chancery Lane, London, W.C., Agents for the Applicant..