Improved Differential Motion for Driving the Bobbins of Slubbing, Roving, and the like Machines Used in the Spinning of Fibrous Materials.
Year: 1895

page_text: Date of Application, 15th May, 1895
Complete Specification Left, 5th Feb., 1896-Accepted, 7th Mar.,
1896
PROVISIONAL SPECIFICATION.
Improved Differential Motion for Driving the Bobbins of Slubbing,
Roving, and the like Machines Used in the Spinning of Fibrous
Materials.
I JOHN FREDERICK BRADBURY of Parel, Bombay, India, Mill Manager, do
hereby declare the nature of this invention to be as follows:-
My said invention consists of an improved construction of differential or "jack"
motion for varying the speed of the bobbins of machines used in spinning fibrous
materials so as to drive the bobbins more slowly as they fill.
In slubbing roving and intermediate frames there is a main driving shaft from
which all the motions are derived and also a pair of cone drums with a sliding
strap from one of which the differential motion is controlled there is also a spur
wheel loosely mounted on the driving shaft and driven or controlled independently
thereof by means of one of the said cone drums through the differential motion.
From the said independently driven spur wheel the bobbins are driven through
suitable gearing wheels.
The main driving shaft the cone pulleys or drums and the spur wheel for driving
the bobbins and intermediate differential gears of various kinds are well known
and I make no general claim to such mechanism.
A differential motion constructed in accordance with my said invention has as
its essential elements a loose bush or sleeve mounted on the driving shaft and
having ends or flanges formed as spur wheels one of which is connected by gearing
to the cone drum so as to receive motion therefrom. In proximity to the other
toothed flange is a boss secured to the main driving shaft carrying in suitable
bearings and parallel to the main driving shaft a short shaft carrying a worm and
also at its outer end a spur wheel or pinion in gear with the near toothed flange of
the above mentioned sleeve.
Another short shaft at right angles to the main driving shaft (and carried by
the aforesaid boss and a bracket or plate secured thereto) has at its inner end a
worm wheel in gear with the worm and at its outer end is a bevel pinion engaging
with a bevel wheel or plate wheel rotating freely on the main driving shaft.
The bobbin driving wheel is secured to the boss (or an extension thereof) of the
bevel or plate wheel and rotates therewith. The differential effect of such a
combination of gearing depends on the relative number of teeth in the various
gearing wheels which may be varied to suit the particular purpose or machine to
which it is intended to be applied.
16 1905
E. T. WHITELOW, A.M. Inst. C.E.,
70 Deansgate, Manchester, Agent for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improved Differential Motion for Driving the Bobbins of Slubbing,
Roving, and the like Machines Used in the Spinning of Fibrous
Materials.
I JOHN FREDERICK BRADBURY of Parel, Bombay, India, 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 :~
My said invention consists of an improved construction of differential or "jack"
motion for varying the speed of the bobbins of machines used in spinning fibrous
materials so as to drive the bobbins more slowly as they fill.
In order to more clearly set forth my said invention I will describe the same
with reference to the accompanying drawings in which
Fig. 1 is a side elevation partly in section.
Fig. 2 is an end elevation with the part 8 of Fig. 1 removed.
In slubbing roving and intermediate frames there is a main driving shaft 1 from
which all the motions are derived and also a pair of cone drums connected by a
sliding strap. From one of the said cone drums shown at 2 the differential motion
is controlled. There is also a spur wheel 3 loosely mounted on the driving shaft
and driven or controlled independently thereof by means of one of the said cone
drums through the differential motion. From the said independently driven spur
wheel 3 the bobbins are driven through suitable gearing wheels.
The main driving shaft 1 the cone pulleys or drums and the spur wheel 3 for
driving the bobbins and intermediate differential gears of various kinds are well
known and I make no general claim to such mechanism as a means for varying
the speed of the spur wheel 3 independently of the shaft 1.
A differential motion constructed in accordance with my said invention has as
its essential elements a loose bush or sleeve 4 mounted on the driving shaft and
having ends or flanges 4° 4° formed as spur wheels one of which 4* is connected by
suitable gearing to the cone drum so as to receive motion therefrom. In proximity
to the other toothed flange is a boss 5 secured to the main driving shaft. In
suitable bearings in or attached to the boss 5 and parallel to the main driving
shaft 1 is a short shaft 6 carrying a worm 6* and also at its outer end a spur wheel
or pinion 6b in gear with the near toothed flange 4 of the above mentioned
sleeve 4.
Another short shaft at right angles to the main driving shaft (and carried by
the aforesaid boss and by a bracket or plate 5" formed with or secured thereto)
has at its inner end a worm wheel 7 in gear with the worm 6ª. At its outer end
is a bevel pinion 7 engaging with a bevel wheel or plate wheel rotating freely on
the main driving shaft 1.
The bobbin driving wheel 3 is secured to the boss 8ª (or an extension thereof) of
the bevel or plate wheel 8 and rotates therewith. The differential effect of such a
combination of gearing depends on the relative number of teeth in the various
gearing wheels which may be varied to suit the particular purpose or machine to
which it is intended to be applied, as will be well understood by those conversant
with the machines in which such gears are used without giving any numerical
examples of particular cases.
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. The differential mechanism substantially as and for the purpose hereinbefore
set forth and shown in the accounans

page_text: 2. The combination of a loose driving bush 4 a fixed boss 5 carrying shafts 6
and 7 with their respective gearing parts and the loose plate or bevel wheel 8
secured to the bobbin wheel 3 substantially as and for the purpose set forth and
shown.
Dated this 3rd day of February 1896.
E. T. WHITELOW, A.M. Inst. C.E.,
70 Deansgate, Manchester, Agent for the Applicant.