Improvements in Drags for Lorries and other Vehicles.
Year: 1889

page_text: Date of Application, 20th Aug., 1889
Complete Specification Left, 17th May, 1890-Accepted, 21st June, 1850
PROVISIONAL SPECIFICATION.
Improvements in Drags for Lorries and other Vehicles.
1, THOMAS MILLER of 42 Dundas Street, Glasgow, in the County of Lanark, North
Britain, Coalmaster, do hereby declare the nature of this invention to be as follows:-
My Invention which relates to drags for lorries and other vehicles, consists of a
piece of metal-preferably crucible steel---having a sole or plate for dragging on the
roads or other surfaces, and two side or edge pieces extending above the level of the
sole plate to keep the wheels on the drag when in operation. The one end of the sole
plate which first comes in contact with the wheel has its edge turned over towards
the ground sufficient to give the plate a better grip of the ground or surface and thus
more effectually retard the rotation of the wheel. The other end of the drag or plate
has one of the side or edge pieces longer than the other and with a slight curve, and
with two eyes both of which are used for fastening a chain to, to secure the drag to a
catch on the lorry, the outer eye being first used, the other or lower eye afterwards,
At that part
to permit of the drag or plate being as near as possible equally worn.
of the drag where the wheel or wheels first enter upon and covering a distance of
3 or more inches are cross lines or grooves which give the wheels a better grip and into
or upon which sand may be placed.
This drag is put into operation on the fore-side of the wheel and by instantly
undoing a catch to which the chain is attached on the lorry it leaves the back side of
the wheel and thus obviates the necessity of stopping the lorry and consequently
saves time.
The drag I prefer to make of crucible steel, as it is tougher and more durable
and answers the purpose better, but it may be made of other metal if desired.
JOHNSONS,
By D. Drysdale Austin,
115, St. Vincent Street, Glasgow, Petitioner's Agents.
COMPLETE SPECIFICATION.
Improvements in Drags for Lorries and other Vehicles.
1, THOMAS MILLER of 42 Dundas Street, Glasgow, in the County of Lanark, North
Britain, Coal-master, 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 which relates to improvements in drags for lorries, and other
vehicles, has for its object to provide a drag which owing to its shape is very easily
manipulated, as on it being put into operation on the foreside of the wheel, and by
instantly undoing a catch to which the chain is attached on the lorry or other vehicle
it readily leaves the back side of the wheel and thus obviates the necessity of stopping
the lorry or other vehicle, and consequently saves time.
In order that my said Invention may be more readily understood and easily carried
into effect, I will describe it with reference to the accompanying drawings. Figure 1
is an elevation, Figure 2 a plan, Figures 3 and 4 end elevations of my improved
drag; and Figures 5 and 6, are part elevation, and part end elevation of a modifi-
cation of same.
My said improved drag consists of a piece of metal A, Figures 1 to 4, preferably a
crucible steel casting, having a sole or plate B for dragging on the roads or other
surfaces and two side or edge pieces C, C, extending above the level of the said sole
plate B, preferably shaped as shewn, so as to keep the wheels on the drag when in

page_text: operation. The end of the sole plate B, which first comes in contact with the ground
is tapered as shewn at b, and is provided with a downward projecting edge b', so as
to give the plate a better grip of the ground or surface, and thus more effectually
retard the rotation of the wheel. The other end 2, of the said sole plate being
preferably rounded off so as to enable it to be easily freed from the wheel, and the
end of the side C', is here prolongated, curved, and made thicker as at D, and pro-
vided with one or more eyes d, d, but preferably two, (so as to enable the said drag
to be more readily adjusted to its proper bearing relative to the position of the wheel)
both of which are used for fastening a chain to, so as to secure the drag to the lorry
or other vehicle, this chain being provided with any well known catch. To enable
the drag to be worn as near as possibly equal, I preferably use the outer eye d, first,
and the lower eye d¹, afterwards. At that part of the drag where the wheel first
enters upon, and covering a distance of three or more inches are cross lines or
grooves E, which tend to give the wheel a better grip, and into or upon which sand
may be placed to aid the gripping power.
As a modification I may if desired form the downward projecting edge b', Figure 1,
with a number of grooves in it as shewn in Figures 5 and 6, at 63.
The said drags I preferably make of crucible cast steel, as it is tougher and more
durable, and answers the purpose better, but if desired I may make them of any
other suitable metal.
Having now particularly described and ascertained the nature of my said invention,
and in what matter the same is to be performed declare that what I claim is.
The construction of a drag for lorries and other vehicles, substantially as described
and shewn in the accompanying drawings.
Dated this 16th day of Mov 1800
JOHNSONS,
115, St. Vincent Street, Glasgow, Applicant's Agents.