COMPLETE SPECIFICATION
TITLE OF INVENTION:- 4-spindle Domestic Hank-To-Bobbin Winding Machine (DHTB Machine)
FIELD OF INVENTION: - The invention relates to development of a new machine applicable for the
handloom industry of India for preparation of suitable packages from hank yarn, which is subsequently
used for warp or weft preparation for manufacturing of a handloom fabric. Preparation of suitable
packages from hank yarn is the most laborious process in handloom industry. Presently available motor
driven 12 spindle or more capacity winding machines are suitable for mill or factory based industry but not
applicable for a cottage based handloom industry due to various reasons. Present invention is based on
pedal driven 4 spindle hank-to-bobbin winding machine.
BACKGROUND OF INVENTION WITH REGARD TO THE DRAWBACK ASSOCIATED WITH KNOWN ART:-
Normally, yarn in hank form is available from spinning mill to the handloom industry which is to be
converted to suitable packages like bobbin, pirn, natai etc, which are required for manufacturing of
handloom fabrics at cottage level. Handlooms are run in individual cottages and the winding work is done
in hand driven single spindle charkha, which is a time consuming and laborious process.
A man can run a charkha for 8 hours a day to wind only 100 to 120 hanks of 840 yards of cotton
yarn. The process in not only laborious but also time consuming for preparation of suitable packages & the
productivity is badly hampered. On the other hand, available motor driven 12 spindle or more capacity
winding machines are suitable for mill industry but not applicable for a cottage based handloom industry
due to various reasons. Prime reasons are a) want of space in the cottage b) Heavy weight & not movable c)
Want of electricity connection & lack of continuous supply in remote area d) High capacity motor
consuming more electricity e) High cost of the machine for a weaver f) The machine cannot run manually.
State handloom cluster development program was implemented in Nuapatna Handloom Cluster &
the issues were identified on diagnostic study and base line survey. To solve the problems, Cluster
Development Executive took initiative for invention of the new machine.
Present machine is designed to run 4 spindles for winding hanks to bobbins & the motion is given
either by a miniature motor of 30 watt capacity or by 02 pedals driven by legs of the winder where there is
no electricity. Care has been taken to make the machine for domestic use removing all the problems faced
to run a machine designed for the mill sector. The prime reasons for its cottage application are a) Size of
the machine is very small i.e. Length-3'.7", Width- 2'.2", Height- 5'.0". b) The weight of the machine is only
75 kgs & movable c) It can run without electricity d) it is driven by a miniature motor of 60 watt capacity
when run by electricity, e) the machine can be run by a chargeable battery of 12 volt f) The cost of the
machine is suitable for the weavers g) the machine can run comfortably by a winder with or without
electricity h) Gear, ball bearing and lever arrangement are applied where ever necessary for reducing the
frictional forces & smooth running of machine.
OBJECT OF INVENTION:- Invention of a suitable machine for domestic & cottage level use. To reduce the
time consumption & labor in winding operation through charkha. To increase the efficiency of a winder and
productivity of weaver. To increase the income of a domestic winder by more than 3 times over
conventional winding operation.
STATEMENT OF INVENTION:- 4-spindle Domestic Hank-To-Bobbin Winding Machine (DHTB Machine) is a
labor saving device than normal charkha winding machine, which can be run in every handloom cottage
with 3 times productivity and income over conventional charkha.

A SUMMERY OF INVENTION:- 4-spindle Domestic Hank-To-Bobbin Winding Machine (DHTB Machine) is a
very simple device can run by electric power or pedal driven by human legs with following salient features
a) Size of the machine is very small suitable for installation at cottage level near the
handloom.
b) The light weight of the machine makes it portable
c) No electric power is required to run the machine
d) It is driven by a miniature motor of 60 watt capacity when run by electricity.
e) it can be run by a chargeable battery of 12 volt

e) The cost of the machine is affordable for the weavers
f) The machine can be run comfortably by a winder with or without electricity.
g) Gear, ball bearing and lever arrangement are applied for reducing the frictional forces &
smooth running of machine.
The new device has overcome all the problems with a large size bobbin winder meant for factory or
mill & now it can be used at decentralized cottage level.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWING:-
The main 15 parts of the device is shown in the figure-1 are described below
Rectangular iron frame -1
Pedal -2
Lever & ball bearing arrangement -3
Cycle rim-free wheel arrangement -4
Main Crank shaft -5
Package shaft -6
Miniature motor -7
Package shaft Pulley arrangement -8
Package holder -9
Bobbin/Natai -10
To & fro thread Guide -11
Thread guide pulley arrangement -12
Upright stand for charkha -13
Charkha -14
Chargeable 12 Volt battery -15
DETAILED DESCRIPTION OF THE INVENTION WITH REFERENCE TO DRAWING/EXAMPLES:-
Rectangular iron frame is as shown at item No-1 in figure-1 bearing the total load of the machine.
Two iron pedals shown at item No-2 which are operated by human legs to run the machine. The pedals are
attached to lever & ball bearing arrangement as shown at item No-3. The motion from pedal is transferred
to free wheel through the main crank shaft (Item No-5) linked with cycle rim-free wheel arrangement
shown at item No-4 and again it is transferred to package shaft shown at item No-6 from the cycle rim
through the pulley arrangement as shown at item No-8. When 02 pedals are operated in one up one down
manner, the package shaft gets continuous motion and rotates the packages by frictional contact with
package holder as shown at item No-9 to wind round yarn thread from hanks placed on the charkha of the
upright stand shown at item No-13 & 14.
Thread guide-pulley arrangement as shown at item No-12 helps the thread to move to & fro across
the package for even distribution of the hank yarn.

The thread from chakha as shown at item No-14 passes through the to & fro moving guide shown at
item No-11 and then transferred to bobbin or natai (Shown at item No-10) which are rotated on frictional
contact with the package shaft to form the suitable package for further processing as warp or weft of a
handloom fabric.
An additional segment with a miniature motor as shown at item No-7 is attached to the machine to
drive the device with electricity as & when required. When there is no electric supply, the machine can be
run by a chargeable battery of 12 volt shown at item No-15 attached to the machine. Here the main shaft
of the motor is directly connected to the pulley of package shaft (item No-6) to rotate it & form the bobbin
or natai packages.
Figure-2 & 3 show the side view of the machine.


I/We claim
1. 4-spindle Domestic Hank-To-Bobbin Winding Machine (DHTB Machine) is designed to make it
suitable for a handloom cottage & it is capable of running by pedal movement by legs or by a
miniature motor of less than 60 watt capacity.
2. When there is electricity available, the machine is able to be operated by a chargeable battery of
12 volt for continuously 16 hrs.
3. Size of the machine is Length-3'.7", Width- 2'.2", Height- 5'.0" & the weight of the machine is 75
kgs & the device is portable from one place to another.
4. The machine can be run comfortably by a winder with or without electricity
5. Ball bearing and lever arrangement applied on the machine reduces the frictional forces &
enable for smooth running of machine.
6. The machine output is more than 3 times over the conventional charkha winding machine
4-spindle Domestic Hank-To-Bobbin Winding Machine (DHTB Machine) is substantially as herein
described and illustrated in the figures of the accompanying drawings.

4-spindle Domestic Hank-To-Bobbin Winding Machine (DHTB Machine) is useful for each handloom
cottage. The prime reasons for its cottage application are a) Size of the machine is very small i.e Length-
3'.7", Width- 2'.2", Height- 5'.0". b) The weight of the machine is only 75 kgs & movable c) It can run
without electricity d) It driven by a miniature motor of 60 watt capacity when run by electricity, e) When
there is electricity available, the machine is able to be operated by a chargeable battery of 12 volt for
continuously 16 hrs. f) The cost of the machine is suitable for the weavers g) the machine can run
comfortably by a winder with or without electricity h) ball bearing and lever arrangement are applied for
reducing the frictional forces & smooth running of machine.
The productivity & income is increased by 3 times over conventional charkha winder. The new
device has overcome all the problems with a large size bobbin winder & now it can be used at decentralized
cottage level.