Improvements in and relating to Harrows.
Year: 1889

page_text: ute of Application, 27th Mar., 1889
Complete Specification Left, 17th Dec., 1889-Accepted. 25th Jan., 1890
PROVISIONAL SPECIFICATION.
Improvements in and relating to Harrows.
WILLIAM FRANCIS BRIGGS, fitter, 26 Cross Street, WILLIAM THOMAS WEST,
publican, 56 Portland Street; both of the city of Lincoln, in the county of the same
City, do hereby declare the nature of the aforesaid invention for IMPROVEMENTS'IN
AND RELATING TO HARROWs to be as follows:-
Of suitable castings, one for each tooth of the harrow, which have two square hori-
zontal holes, situated diagonally with regard to each other, for the reception of the
bars of the frame, and also another hole situated vertically, for the reception of the
tooth of the harrow, which hole runs at the sides of the other two holes, so that a
wedge driven in at the side of the tooth, clamps the bars of the frame and teeth
together. Of a parallel lifting arrangement, for drag harrows, which consists
essenially of a casting fastened to the front of the drag harrow; to which is fixed a.
toothed quadrant, which is in gear with a similar but moveable tootlied quadrant,
turning on a piu, in the casting at the front of the harrow. These quadrants are
connected together by links. The movement of the quadrant, which lifts the front of
the harrow, is controlled by the lever, which raises the back in the usual manner.
Dated this 95th day of March 1889
WILLIAM THOMAS WEST.
WILLIAM FRANCIS BRIGGS.
COMPLETE SPECIFICATION.
Improvements in and relating to Harrows.
We, WILLIAM FRANCIS BRIGGS, of No. 26, Cross Street, Fitter, and WILLIAM
THOMAS WEST, of No. 56, Portland Street, Publican, both in the City and County of
Lincoln, 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:
Our invention relates to suitable castings, one for each tooth of the harrow, which
castings have two square horizontal holes, situated diagonally with regard to each
other for the reception of the bars of the frame, and also another hole situated verti-
cally for the reception of the tooth of the harrow, which hole runs at the sides of the
other two holes, so that a wedge driven in at the side of the tooth, clamps the bars of
the frame and teeth together. Our invention also relates to a parallel lifting arrange-
ment for drag harrows, which consists essentially of a casting fastened to the front of
the drag harrow, to which is fixed a toothed segment or quadrant, which is in gear
with a similar, but moveable tootbed segment or quadrant, turning on a pin carried
by a casting at the front of the harrow or tine frame. These segments or quadrants
are connected together by links attached to the castings. The movement of the
segment or quadrant which lifts the front of the harrow is controlled by the lever
which raises the back in the usual manner.
And in order that the said invention may be more clearly understood and readily
carried into effect; I will proceed, aided by the accompanying drawings, more fully to
describe the same.
DESCRIPTION OF THE DRAWINGS.
-
Figure 1. is a side elevation of a drag harrow, embodying our improvements.
Figure 2. is a plan of part thereof, that is to say, the tine frame illustrating our
method of fixing the teeth or tines and bars in position."
.'
Figure 3. is an elevation of parts drawn to an enlarged scale of a single tooth or
tine and connected parts separately and
.+

page_text: Figure 4. is a plan thereof.
Figure 5. is a view similar to Figure 3., but illustrating our invention in connection
with a different form of tooth or tine, and
Figure 6. is a plan thereof.
In the several Figures, like parts are indicated by similar letters of reference.
Referring to Figures 1. to 4. a. represents the tine frame which is composed of a
number of parallel transverse bars a¹, and radially or diagonally disposed longitudinal
bars a³ which cross each others path and are solidly connected together at each crossing,
but with capability of being readily disconnected as hereinafter described.
The means of connection consist of a casting b. which also constitutes a holder for a
tine or tooth c., one of such castings being employed for each tooth of the harrow.
Each of these castings b. is formed with two horizontal holes therethrough of a
square section to receive the bars a' a² of the frame a. and with a single vertical hole b²
to receive the upper part of the time or tooth c.
The horizontal holes are disposed in different horizontal planes to enable the
bars a¹ a² to cross each others path, and they are arranged diagonally to each other at
angles to suit the different angles of the bars a whilst their inner walls are open to
the vertical hole 6² so that the bars a' a² at one side thereof, slightly enter into such
vertical hole b².
The vertical hole is formed in one angle thereof with a groove or channel ³ to
receive a wedge or key d. so that when the bars a¹ a² and time or tooth c. are placed
in position in their respective holes 1 and 2, the wedge or key d. is driven into the
groove thereby clamping the bars a' and a² of the frame a. and the tooth or tine c.
firmly together.
By these means a bar a¹ or a², or a tooth or tine c. may be more readily removed
and replaced than heretofore whilst when in position, the parts are solidly clamped
together, whilst the number of tines acting upon the land, may be varied by taking
some out of the vertical holes 62 and reinserting them from the upper side of the
casting, but in an inverted position, or a plain bar of like section might be inserted in
*lieu thereof.
The arrangement represented at Figures 5 and 6 is, in all essential particulars
similar to that hereinbefore described, but in this example, a straight or approxi-
mately straight tooth or tine c is substituted for the curved form represented in
the other figures of the drawings.
We will now proceed to describe our parallel lifting arrangement for drag harrows
and which is represented at Figure 1.
e. represents a bracket or casting which is firinly secured to the front of the tine
frame a. by means of bolts el and upon a stud or axis e carried by the bracket e. is
mounted with capability of partial revolution, a toothed segment or quadrant f. which
gears with a similar toothed segment g. fixed to a casting h. which forms the front of
the harrow and carries the spindle of the front or steering wheel i. in bearings h¹.
The bracket e. and the casting or front h. of the harrow are coupled by means of
connecting links j., which are, at one end, mounted upon studs or axes e² formed or
fixed upon the bracket e. and at the other end, upon studs or axes ³ ³ formed or fixed
upon the casting h.
The segment or quadrant f. is formed or provided with an arm or offset f¹ to the
extremity of which is connected by a pin joint one end of a connecting rod k., which
is, at its other end, pinjointed to a crank or offset from a shaft 1., upon which is
fixed the usual lever m. which, at its lower end, carries the axle n' of the rear wheels n.
and turns upon such axle n¹ which constitutes the fulcrum to raise the rear part of the
frame a. as is well understood.
By these means, as the lever m. is raised or moved around its axis together with the
shaft 7. in order to raise the rear part of the frame a. the movements of such lever m.
will, through the offset from the shaft ., the connecting rod k., the offset f1, be
communicated to the segment f. so that the front and rear parts of the harrow will be
raised equally and simultaneously

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. In a harrow, the means of clamping together the longitudinal and transverse bars
and the tines consisting of a casting formed with two horizontal holes therethrough
arranged in different horizontal planes, and a vertical hole communicating with the
horizontal holes, a groove in one of the walls of the vertical hole to receive a wedge
or key, and a wedge or key to jam the parts together, all in manner substantially
as herein shown and described.
2. As an integral part of a harrow, al casting formed with two horizontal holes
therethrough arranged in different horizontal planes, and a vertical hole communi-
cating with such horizontal holes, all in manner substantially as herein shown and
described.
3. In a harrow, the means of lifting the front part thereof, consisting of a bracket
or casting carried by the front end of the frame and connected by links with a casting
carrying the bearings for the spindle of the steering wheel, a fixed segment attached
to one of such castings, a moveable segment mounted upon the other of such castings,
an offset from the moveable segment and a link or connecting rod to couple such
segment with the ordinary lever for lifting the rear part of the machine, all in manner
substantially as herein shown and described.
Dated thin 17th day of Dacomber 1980
VAUGHAN & SON,
Agents for the Applicants.