Improvements in Shackles and Trace Hooks of Vehicles.
Year: 1892

page_text: Date of Application, 15th Dec., 1892
Complete Specification Left, 15th Sept., 1893-Accepted, 15th Dec., 1893
PROVISIONAL SPECIFICATION.
Improvements in Shackles and Trace Hooks of Vehicles.
I WILLIAM BOYES of Albion Coach Spring Works 118 Barford Street
Birmingham in the County of Warwick Coach Spring Maker do hereby declare
the nature of this invention to be as follows:-
My invention has for its object improvements in shackles and trace hooks by
which I add considerably to the amount of spring in the supporting arrangement of
vehicles and by which I prevent a considerable amount of the vibration, my
shackles coming into operation when only one person is in a vehicle constructed
with springs sufficiently strong to contain four thus leaving the main spring to come
into operation when the vehicle is fully loaded and I so construct my shackles that
they answer either for cross or parallel shackles.
In carrying my invention into effect I form iny shackle with the two forked ends
and pins for attachment to the main spring or vehicle as the case may be and
between the two I form a stem which is divided into two parts the one part having
a tapped hole through its length the other part being cast hollow with a shoulder
at the reverse end to the fork the two parts are then joined together by a pin
having a head which fits the hollow stem of the one part and the end of which is
screwed into the tapped hole in the other part to which it is securely fixed an inter-
mediate coiled spring being placed between the head of the pin & the shoulder at
the end of the hollow part so that when the strain is brought to bear on the shackle
the spring is compressed more or less by reason of the amount of strain. It will
readily be seen that the one end of the shackle can be turned on the pin to right
angles with the other end thus forming either a parallel or cross shackle. In the
case of a trace hook the the arrangement would be the same except that the one
end would be formed as a trace hook while the other end would have a plate for
attachment to the vehicle I may make my shackle in mallable iron brass white metal
or I may have it plated if I so desire. In place of the coiled spring I may
substitute a rubber cushion or suitable cushion or spring.
1000
WILLIAM BOYES.
COMPLETE SPECIFICATION.
Improvements in Shackles and Trace Hooks of Vehicles.
I WILLIAM BOYES of Birmingham, in the County of Warwick Manufacturer
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 has for its object improvements in shackles and trace hooks of
vehicles by which the strain and jar on the main spring is obviated by the shackles
while in the case of the trace hooks the sudden pull or jerk is in the same way
prevented.
In order that my invention may be clearly understood and more easily carried
into practice I have appended hereunto a sheet of drawings upon which I have
fully illustrated the nature of my said improvements.
Figure 1, is an elevation of the trace hook.
Figure 2, is an end elevation of Figure 1.
Figure 3, is a longitudinal section through Figure 1.
Figure 4, is an elevation of the spring.

page_text: Figure 5, is an elevation of the internal screw bolt.
Figure 6, is an elevation of the shackle.
Figure 7, is a section through Figure 6.
In carrying my invention into effect I form the tube or socket A which is attached
to any convenient part of the cart by the bolts al and within this socket I mount
the screw bolt B to which is attached the trace hook D. Around the bolt B
within the socket A the spring E is mounted so as to receive the full force of any
jerk or pull upon the trace hook D.
In the case of the shackles F the main springs H of the vehicle are attached
at the other end of the shackle f' being attached to the body of the vehicle
itself, the internal spring E in this case easing the jar or jerk upon the main
spring F. Of course the shapes of the ends of the shackles or trace hooks may be
varied to suit the particular requirements of the case, as for instance in the case of
cart horses the trace hook shown in Figure 1 may be so modified as to be readily
fixed to the hames of such horses.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is
The improvements in shackles and trace hooks of vehicles in which the spring E
is arranged to obviate the jerk or vibration, substantially as herein set forth and
shown upon the accompanying drawings.
Dated this 14th day of September 1893.
WILLIAM BOYES.