Improvements in Elastic Cords.
Year: 1897

page_text: Date of Application, 14th Sept., 1897-Accepted, 16th Oct., 1897
COMPLETE SPECIFICATION.
Improvements in Elastic Cords.
I ALFRED MAY ZIEGLER of 20 Cedar Park, Roxbury District, Boston in the
County of Suffolk, and State of Massachusetts, United States of America, Manu-
facturer, 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:-
Prior to this invention an elastic core has been covered with a tubular covering,
formed on it, the threads of the covering during its formation having their angle
of presentation to the core so changed as to bind some portions of the elastic
core more tightly than other portions; the portions wound more tightly yielding
to a less degree than the looser covered portions.
This invention presents a novel elastic cord composed of a core made up of one
or a plurality of india rubber or elastic strands, which when stretched are both
wound tightly and spirally and also covered with a braided or woven covering.
The manner in which the core is preferably produced is to first stretch the
core, and while stretched wrap it closely and spirally at intervals with a suitable
thread or threads, and to thereafter braid or weave about the stretched and wound
core a continuous tubular covering, the covering in each instance enclosing and
hiding the spiral winding.
When finished and released from tension the unwound part of the core assumes
its normal condition.
This cord when distended will stretch especially at the spaces where it is not
wound.
Fig. 1, in elevation, shows a plurality of stretched strands of india rubber;
Fig. 1, a section thereof;
Fig. 2 shows the said strands wound spirally at intervals;
Fig. 2, a section thereof; ·
Fig. 3 shows the stretched and wound core covered;
Fig. 3, a section thereof;
Fig. 4 shows the covered cord of Fig. 3 released from tension;
A suitable india rubber core, as a, is first taken, it being composed preferably
of a plurality of india rubber strands, and the same is stretched.
Then with a suitable winding apparatus, a thread b is wound spirally about the
core at suitable distances apart, as shown in Fig. 2, the extent of the windings
and their distance apart varying according to the degree of elasticity required for
the finished cord.
And while yet in this stretched condition a braided or woven tubular cover c
is applied at intervals to the core so wound.
When this cord is released from tension, the portions of the core which are
surrounded only by the cover will contract freely, while the wound and covered
portions will contract but slightly and when this cord is subjected to strain it
will stretch freely at its portions surrounded only by the cover, and its wound
and covered portions will stretch to a much less degree, that depending upon the
Pain Q11

page_text: fact whether or not the strain the cord is subjected to in use is in excess of the
strain to which the core was subjected when it was being wound.
When this cord is put into use in suspenders, it will be cut transversely through
the portions where it is spirally wound, and that part of the cord will have applied
to it a suitable clamp.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what I
clain is:
1. An elastic cord composed of an elastic core, portions of which are wound
at intervals and covered with a tubular covering, substantially as described.
2. The herein described elastic cord having portions tightly wound thereon at
intervals to limit the elasticity of the cord, substantially as described.
Dated the 13th day of September 1897.
WM. BROOKES & SON,
55 and 56 Chancery Lane, London, Agents for the Applicant.