Year: 1895

page_text: Date of Application, 9th Dec., 1895
Complete Specification Left, 31st Mar., 1896-Accepted, 2nd May, 1896
I, WILLIAM SAMUEL MAVOR M.R.C.S., L.R.C.P., of The Cottage, Waltham
Cross, in the County of Herts, do hereby declare the nature of this invention to
be as follows:-
This invention relates to wheel-tyres and has for its main object to provide
improved means for reducing vibration.
The essential feature of the invention consists in arranging a series of springs
around the rim of the wheel the said springs being enclosed in a covering of
caoutchouc or other suitable material.
According to one arrangement of my invention the springs are made from strips
of steel of suitable width and thickness which are bent into a more or less elliptical
form. The ends of these strips are bent outwardly and terminate in hook-like
extremities which are so shaped as to enable the springs to be connected together
when they are applied to the rim or felloe of a wheel. The said rim or felloe is
provided with a suitable circumferential groove for the reception of the springs.
Instead of forming the springs with hook-like extremities for enabling them to
be coupled together as above explained any other suitable means may be employed
for the purpose.
In some cases I construct the springs in spiral form and of any appropriate
length for insertion into an india-rubber or other covering constructed with
compartments. These compartments serve, in conjunction with the rim or felloe
of the wheel, to maintain the springs in position. The springs are provided at
each end with discs of vulcanite india-rubber or other suitable material held in
place in any convenient manner. The springs may be inserted into the covering
through longitudinal slits or apertures. If desired I may employ metal strips of
suitable form interposed between the springs and the outer covering to prevent
abrasion of the covering by the springs.
I do not confine myself to the elliptical or spiral form of springs above stated
as they may be of undulatory or other suitable form.
It will be obvious that the aforesaid springs may be constructed of wire instead
of ribbon.
For the purpose of enabling the ends of the springs to be readily connected
together I may employ a metal socket or ferrule for receiving the adjacent ends
of the springs which are in this case left plain, that is to say, unprovided with the
book-like extremities. These sockets or ferrules also serve as means for readily
connecting together the ends of the springs in the event of the hook-like extremities
becoming broken.
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.

page_text: Improvements in Wheel-tyres.
I, WILLIAM SAMUEL MAVOR, M.R.C.S., L.R.C.P., of The Cottage, Waltham
Cross, in the County of Herts, 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 wheel-tyres and consists in the employment of a
number of independent springs preferably of spiral form, which are capable of
insertion into or removal from an indiarubber or other flexible casing or tubular
tyre which is provided with internal compartments for the reception of the
aforesaid springs.
In order that my invention may be clearly understood and readily carried into
effect I will proceed to describe the same more fully with reference to the
accompanying drawings in which
Figure 1 is a sectional elevation of a portion of a tyre constructed in accordance
with my invention.
Figure 2 is an underside view of the same.
Figure 3 is a transverse section of the tyre and its rim and
Figure 4 is a sectional elevation of one of the springs detached.
A is the tyre; B the rim; and C the springs.
The tyre consists of a tubular ring composed of india-rubber or other appro-
priate material that possesses sufficient elasticity to enable the tyre to be readily
connected to or disconnected from the rim of the wheel. This tubular ring is
formed with internal partitions a which divide the tyre into a number of separate
compartments. Each of these compartments is provided with a longitudinal slot
or aperture a¹ which is situated at a point about midway between the partitions
or at a point in proximity to the partitions as shewn by the dotted lines in
Figure 2.
C
The springs C are preferably composed of thin steel ribbon wound into spiral
form, with the ends attached to blocks that abut against discs c¹ situated at the
extremities of a resilient rod or wire c². This resilient rod or wire extends
longitudinally through the spring and is bent or curved so as to impart a
curvature to the said springs. The radius of curvature of the springs is less than
that of the tyre so that when the springs are in place they become somewhat
straightened (as will be seen on a comparison of Figures 1 and 4), with the result
that their length is increased. Their end discs c therefore press with a certain
amount of force against the opposite sides of the partitions a (see Figure 1) and
mutually assist each other in producing a strong but flexible tyre.
I prefer to make the rim B of the wheel in such a manner that there will
normally be a slight space at 6b between the tyre and the inner surface of the
rim, so that the tyre can dilate slightly when the springs expand under the weight
they support.
In the event of one or other of the springs breaking, it can be readily removed
from its compartment, and replaced by a new one, through the aperture a¹, the
tyre being previously raised from the rim at this point. This replacement of a
broken spring can be effected without in the least interfering with the other
springs.
If desired thin metal strips or shields of curved form may be interposed between
the outer circumference of the aforesaid springs and the inner surface of the
tubular tyre for preventing abrasion thereof by the springs.

page_text: 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 :-
1. A wheel-tyre consisting of a tubular ring or casing divided into.
compartments and enclosing a number of independent spiral springs arranged
end to end substantially as described and for the purpose specified.
2. A flexible tubular ring or casing divided into compartments and having
lateral apertures therein, for the purpose specified.
3. A spiral spring having a resilient rod or wire terminating in discs for the
purpose specified.
4. The improved tyre adapted for use with a wheel rim of semicircular
cross-section substantially as described with reference to the accompanying
drawing.
Dated this 30th day of March 1896.
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.