An Improved Automatic Tension Regulator for Power Looms.
Year: 1895

page_text: Date of Application, 11th May, 1895
Complete Specification Left, 6th Feb., 1896-Accepted, 7th Mar., 1898
An Improved Automatic Tension Regulator for Power Looms.
A communication from abrond by HENRY HARWOOD, Manager of the Delhi
Cloth and General Mills Company, Limited, Delhi, Punjab, India.
I EDWARD HARWOOD of Delhi House, Moss Lane, Accrington, in the County
of Lancaster, Mill Manager, do hereby declate the nature of this invention to be
as follows..
-
This invention is applicable to looms for weaving cotton, wool, Jute and othe
fibrous materials and relates to the construction of an automatic tension regulator
to be applied to the yain beams of such looms for the purpose of reducing the
weight or fiction on such yarn beams in the same ratio as the diameter thereof
decreases by the gradual unwinding of the yarn in the process of weaving
For the purposes of my invention I employ a polished pipe or hollow roller of
wrought iron or other suitable material which presses against the under surface of
the yarn on the beam being supported by two grooved bowls which are carried
at the outer ends of the horizontal arins of two bell crank levers both mounted on
the same central pivot which is carried by the back tail of the loom frame
To the lower ends of the other arins of the said bell crank levers two chains are
connected (one to each) which cross each other and pass over two pullies fixed one
to each loom side, a weight of say about ten pounds being attached to the end of
each chain so that these weights have a tendency to draw the lower arms of the
two bell crank levers together and thus press the polished pipe or roller above
named constantly upwards against the lower surface of the yarn beam
The ordinary weighting levers at the back of the loom are raised into a horizontal
position and are coupled by rods or links to two smaller wrought iron levers beneath
them which are pivoted to two brackets bolted to the back rail of the loom frame.
On these lower levers nie two sliding weights which are connected by rods to the
euds of the lower arms of the bell ciank levers.
As the yarn beam decreases in diameter the lower aims of the bell crank levels
are drawn together by the weighted chains and move the sliding weights along the
lower levels nearer to the fulcium and thus diminish the pressure of the polished
tube on hollow roller against the surface of the yarn beam so as to regulate and
keep the tension of the yain always constant.
Dated thus 10th day of May 1895.
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicant.

page_text: A communication to me by LIENRY HARWOOD, Manager of the Delhi Cloth and
General Mills Company, Limited, Delhi, India
1 EDWARD HARWOOD of Delhi House Moss Lane, Accrington, in the County
of Lancaster, Mill Manager, 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 is applicable to looms for weaving cotton, wool, jute and other
fibrous materials, and relates to the constinction of an automatic tension regulator
to be applied to the yain beams of such looms for the purpose of reducing the
weight or fuction on such yarn beams in the same ratio as the diameter thereof
decreases by the gradual unwinding of the yatu in the process of weaving.
The invention will be readily understood on reference to the accompanying
diawing which represents so much of the back of a loom as 18 necessary to illustrate
the invention
I employ a polished pipe or hollow roller a of wrought on or other suitable
material which pre-ses against the under surface of the yarn bon the bean b+
being supported by two grooved bowls cc' which are carried at the outer onds of
the horizontal aims of two bell crauk levers ad', both mounted on the same
central pivot e which is carried by the back rail of the loom fiame
To the lower ends of the other arms of the said bell clank levers dd two
chains og are connected (one to each) which cross each other and pass over two
pullies fixed ono to each loom side, a weight of say about ten pounds boing
attached to the end of each chain so that these weights have a tendency to
draw the lower aims of the two bell erauk levers dd' together, as indicated by the
arrows, and thus press the polished pipe or roller a above named constantly upwards
against the lower su face of the yarn b on the beam b+.
The ordinary weighting levers at the back of the loom are inised into a
horizontal position and are coupled by rods or links to two smaller wrought iron
leveis mm beneath them, which are pivoted to two brackets nn' bolted to the back
ail of the loom frame. On these lower levers m m³ are two sliding weights oo'
which are connected by rods ppl to the ends of the lower aims of the bell
crank levers.
As the yaru on the beam decreases in diameter the lower arms of the bell crank
levers d d are drawn together by the weighted chains 9g and move the sliding
weights oo' along the lower levers m m³ nearer to the fulcrum, and thus diminish
the weight put upon the beam by the weighting levers AA by the pressure of the
polished tube or hollow roller a against the surface of the yarn bou the beam b+
so as to regulate and keep the tension of the yarn always constant.
Having now particularly described and ascertamed the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim 18-
The improved automatic tension regulator for power looms constructed and
operating substantially as bei erubefore described and illustrated by the annexed
drawings.
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicant