*Improvements in Scarifiers or Apparatus for Breaking Up Roads and the like.
Year: 1899

page_text: L
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Date of Application, 19th Jan., 1899-Accepted, 11th Mar., 1399
COMPLETE SPECIFICATION.
*Improvements in Scarifiers or Apparatus for Breaking Up Roads
and the like.
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:-
My invention relates to scarifiers or apparatus for breaking up roads and the
like which scarifiers are constructed with a tool holder capable of swinging for
adjustment upon a saddle piece or bracket which can be attached to, and trans-
versely adjusted and fixed at the rear of a traction engine, road roller, or equivalent
motor. The object of my present invention is to provide an improved simple, and
efficient arrangement whereby the swinging tool holder can be adjusted and fixed
in position whilst the engine is in operation. I will describe my invention with
reference to the accompanying drawing which shews in views at right angles to
each other in Figures 1 and 2 and in sections (respectively on the lines 1, 2 and 3, 4
of Figure 1) in Figures 3 and 4 an apparatus constructed in accordance with my
present invention.
The bed plate B attached to the motor (part of which is indicated at A) and the
saddle piece C, the swing frame or tool holder F, and the screw D, and guides
for lateral adjustment, are similar to those described in the Specification of my
Application for Letters Patent No. 8907 of the 16th April 1898, but the arrange-
ment for adjusting and fixing the swinging frame and tool holder is different.
The trunnions of the boss carrying the tools extend beyond their bearings in the
side pieces of the frame F which are centered to the saddle piece at E. The saddle
piece has centered to it at E2 bracket pieces E3 in which at each side is mounted
a screw nut H' having a toothed wheel formed on it and capable of revolving in
bearings in the said bracket piece E³. A screw H2 passes at each side through the
said screw nuts H₁ and the end of each screw is formed with an eye at H³ taking
over the projecting end of the trunnion at each side of the swinging frame or
holder F. In bearings in the brackets E3 is carried a shaft h provided with
handles gl and with worms H one for engaging with each of the worm wheels H¹
so that by rotating either of the hand wheels g¹ and shaft h the worms H turn
the worm wheels H¹ and consequently the nuts formed therewith move the
screws H2 in one, or the other, direction and raise or lower the tools by turning
the frame F upon its centres E.
Having now particularly described and ascertained the nature of my
invention and in what manner the same is to be performed I declare that what
I claim is:―
1. In a scarifier of the character described the combination of screws and means

page_text: for actuating them for adjusting the tool holders substantially as hereinbefore
described and illustrated in the accompanying drawings.
2. A scarifier consisting of the arrangement and combination of parts sub-
stantially as herein before described and illustrated in the accompanying drawings.
Dated this 19th day of January 1899.
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, London, W.C., Agents.