Improvements in Apparatus for Breaking Up or Scarifying the Surfaces of Roads and other Ground Surfaces.
Year: 1898

page_text: Improvements in Apparatus for Breaking Up or Scarifying the
Surfaces of Roads and other Ground Surfaces.
I, JAMES MARSHALL, of Britannia Iron Works, Gainsborough, in the County
of Lincoln, Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to improvements in apparatus for breaking up or
scarifying the surfaces of roads and in particular macadamized roads, and other
ground surfaces, and has for its object to provide apparatus which can be readily
adapted to traction engines, road rollers and other motors and which can be
very readily adjusted, transversely to scarify the surface of the ground for the
full width of the engine or motor which is an important feature of my invention.
To attain this I provide a bedplate or support which can be attached to the
traction engine, road roller or other motor to which the apparatus is to be applied.
Guides are formed in the said bedplate in which a saddle piece or bracket can be
moved in a horizontal plane by means of a screw, ratchet or other equivalent device
for obtaining the transverse adjustment of the apparatus. A projection forming
a deep boss on the said saddle-piece or bracket is bored out to receive a shaft,
the projecting ends of which serve as bearings or pivots for a swinging frame.
The position of the said swinging frame relatively to the surface to be scarified or
broken can be adjusted by means of a worm and toothed quadrant and the said
swinging frame can be locked in any desired position by means of a suitable
clamping device as for example a bolt working through a slot in the aforesaid
swinging frame taking into the saddle piece or bracket.
A rotating tool holder, working against fixed or adjustable stops, is mounted
on the end of the swinging frame, being carried for example on trunnions between
the projecting ends of the said frame. The tool holder is arranged to carry one
or more tools; the said tool or tools is or are preferably double-ended and by
rotating the tool holder through a portion of a circle either end of the tool or
tools can be brought into contact with the road or other ground surface to be
scarified or broken according to the direction in which the traction engine or other
motor is to be moved.
The tools may be secured to the tool holder by means of wedges, cotters screws
or the like.

page_text: Improvements in Apparatus for Breaking Up or Scarifying the
Surfaces of Roads and other Ground Surfaces.
I, JAMES MARSHALL, of Britannia Iron Works, Gainsborough, in the County
of Lincoln, Engineer, 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 apparatus for breaking up, or scarifying roads, and
is particularly intended for use on macadamized roads, although it may be used
for breaking up roads or the surface of the ground generally and the said inven-
tion has for its object to provide apparatus which can be readily applied to
traction engines, road rollers, and other motors, an important feature being that
the scarifier can be very readily adjusted transversely to scarify the surface of the
road or ground for approximately the full width of the engine or motor with
which it is used so as to act upon a road the full width thereof up to the gutters
without turning the engine.
I will describe my invention with reference to the accompanying drawings.
Figures 1 and 2 are elevations at right angles to one another of one arrangement
and Figures 3 and 4 are like views of another arrangement.
A represents part of the engine to which the apparatus is applied, such as a
traction engine, road roller or other motor. B is a bed plate bolted to the said
motor and having guides formed therein in which a saddle piece or bracket C, can be
moved in a horizontal plane by means of a screw, ratchet or equivalent device
for obtaining the transverse adjustment of the apparatus.
In the drawing the device is shewn as consisting of a screw I mounted to
turn in bearings d at the ends of the bed plate and engaging with a screw box
or nut in the saddle piece C, so that when the screw D is rotated by means of
the hand wheel the saddle piece is caused to travel in one or the other direction
upon the said screw. A projection forming a deep boss C2 on the said saddle-
piece C is bored out to receive a shaft E to the projecting ends of which is secured
the swinging frame constituted by the side pieces and the boss or tool holder G
carrying the scarifiers g. The position of the said swinging frame relatively to
the surface to be scarified, or broken, can be adjusted by means of a worm H on
a shaft provided with a handle g and mounted in a bracket c extending from
the saddle piece C. The said worm engages with a toothed quadrant I on one
side F of the swinging frame and the said swinging frame can, after adjustment,
be locked in the adjusted position by means of a suitable clamping device such
for example as the bolt J working through slots fl in each side of the swinging
frame and passing through the saddle piece C and provided with a hand wheel j
and nuts for clamping the frame to the saddle piece C.
The tool holder or boss G can be partially rotated on its axis, being carried
for example on trunnions between the projecting ends of the sides F of the
swinging frame, and having flattened parts at g, which engage with projections
or stops formed on the sides F, thus limiting the rotation of the tool holder
between fixed positions at which it rests with the tools held at the correct angle
with the surface to be scarified for either the forward or backward traverse of
the engine. The tool holder or boss G carries any convenient number of tools
(preferably double ended) which are secured in the tool holder by cotter bolts and
wedges or other suitable device, so that the tools can be readily removed and
adjusted endwise.
In the arrangement shewn in Figures 3 and 4 the parts which correspond with
those in Figures 1 and 2 are marked with the same letters of reference. The

page_text: principal differences between this arrangement and that of Figures 1 and 2 is
that the worm H engages with a worm wheel H¹ keyed to a shaft He which turns
in bearings at the top of the saddle piece C and has also keyed to it toothed
wheels or quadrants h which engage with the quadrants I at the top of the side
pieces of the swinging frame. The boss or tool holder G is here shewn fitted
with a lever handle for partially rotating the said tool holder between the
stops on the sides F, the handle being clamped in position, for either the forward
or backward traverse of the engine or in mid-position for travelling, by the screw
nut and handwheel and screw J passing through it, and a slot in the arm K
fixed to one of the side pieces F. In Figures 3 and 4 the tools are shewn arranged
in two sets, one set for the forward, and the other for the backward, traverse
of the engine. The above or similar arrangement of tools and locking device
may also be applied to the arrangement shewn in Figures 1 and 2.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is-
1. A scarifier, for breaking up roads, and for similar purposes, consisting of
a tool-carrying frame carried by, and transversely adjustable in, a bed plate, or
guides, attached to a road engine, roller or other motor; substantially as herein-
before described.
2. A scarifier, for breaking up roads, and for similar purposes, consisting of a
radial swinging tool-carrying frame adjustable for the depth of cut, the said
frame being carried by a bed plate, or guides, attached to a road engine, roller,
or other motor, and provided with a horizontal traversing arrangement to admit
of scarifying the full width of road up to the gutters without turning the engine,
or motor; substantially as herein before described.
3. In scarifiers, the combination with a radial swinging tool-carrying frame,
having a horizontal traversing motion, of a reversible trunnioned tool holder,
carrying double ended tools; the said tool holder turning between stops on the
swinging frame so that the tools are adjustable to, and are held at a proper angle
with, the surface to be scarified for the forward and backward motion of the
motor; substantially as herein before described.
4. A scarifier constructed as hereinbefore described and illustrated in Figures 1
and 2 of the accompanying drawings.
5. A scarifier constructed as hereinbefore described and illustrated in Figures 3
and 4 of the accompanying drawings.
3
1000
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, London, W.C., Agents.