improvements in Vehicle Brakes.
Year: 1899

page_text: Date of Application, 20th May, 1899
Complete Specification Left, 14th Feb., 1900-Accepted. 24th Mar
1600
5701
improvements in Vehicle Brakes.
I ARTHUR JAMES IVORY, of 4, Blythwood Road, Crouch Hill, London, N.,
Manufacturer, do hereby declare the nature of this invention to be as follows:
My invention relates to drag shoes used for vehicle wheel brakes.
My invention consists in a strong and simple drag shoe constructed with a
securely attached but readily replaceable sole, and in a method of attachment of
the sole to the shoe proper.
In carrying my invention into effect according to one modification I make
the drag shoe preferably of wrought iron, cast iron, malleable cast iron or steel
or any other suitable material.
On the bottom of the shoe at its side edges I provide dovetail fillets or strips
which approach each other at the rear end of the shoe. These strips form a
transverse and longitudinal dovetail into which I place a suitable sole or block
the top of which is correspondingly dovetailed. This sole or block forms a wear-
ing part which is easily detached from the slipper or shoe and cannot fall out
owing to the transverse dovetail. It becomes firmly fixed in the longitudinal
dovetail by the friction of the road on the sole or block when the drag shoe is
put into use, thus obviating the necessity of rivets, bolts or any other fastening.
The drag shoe is provided with the usual eye or hook for the attachment of
the chain, and is inclined at both back and front to enable the wheel to readily
reach its place on the top of the shoe. It has also vertically projecting side
ears to retain the shoe laterally under the wheel while in use.
The worn block is easily removed by driving it out of the dovetail when a new
block is required.
Data
000
.
I, ARTHUR JAMES IVORY, of 4, Blythwood Road, Crouch Hill, London, N.,
Manufacturer, do hereby declare the nature of this invention and in what
O manner the same is to be performed, to be particularly described and ascertained
in and by the following statement:-
My invention relates to drag shoes used for wheels of vehicles and has for its
object the production of a strong and simple drag shoe with a securely attached
but readily replaceable sole.

page_text: My invention consists in removably attaching the sole to the shoe proper by
means of a tapered dovetail joint, as hereinafter described.
Referring to the accompanying drawings which illustrate one modification of
my invention.
Figures 1 and 2 are respectively side and front elevations of the shoe with the
sole attached, and,
Figures 3 and 4 are respectively plans of the shoe and sole separated from
one another.
The shoe and sole b may be of any suitable material: but I prefer to make
the shoe of wrought iron and the sole of cast iron. The shoe has on its bottom
a dovetail projection or fin e, the sides of which diverge from front to rear:
and the sole is provided with a dovetail groove d also with divergent sides
adapted to fit the fin on the shoe. By this means the sole can be readily attached
to the shoe without skilled labour by simply sliding the fine into the groove d,
entering it at the rear end of the groove. The sole becomes firmly fixed to the
shoe by the friction of the road when the drag shoe is put into use, thus obviating
the necessity of rivets, bolts or other fastening.
The drag shoe is provided with an eye e for the attachment of the chain and
with vertical ears f to retain the shoe laterally under the wheel while in use.
Instead of having a fin on the shoe and a groove on the sole, I may form the
fin on the sole and provide the shoe with a groove. I may also use two or more
fins instead of only one.
The worn sole is easily removed by striking it off the shoe when a new sole
is required, without requiring to go to a skilled workman.
I may convert old brake shoes into my improved form by taking the shoe
plate, (to which the sole is in present construction rivetted), and rivetting on
a dovetailed fin which fits into my new form of dovetail sole.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed, I declare that what
I claim is
1. The combination with a shoe for vehicle wheels of a removable sole which
is attached to the shoe by means of a tapered dovetail joint, substantially as and
for the purpose described.
ebruary 1900.
MARKS & CLERK,
18, Southampton Buildings, London, W.C.,
13, Temple Street, Birmingham, and
25, Cross Street, Manchester, Agents.
ated this 14th day of l'ebruary 1900.
MARKS & CLERK,
18, Southampton Buildings, London, W.C.,
13, Temple Street, Birmingham, and
25, Cross Street, Manchester, Agents.