Improvements in Spinning Frames.
Year: 1892

page_text: Date of Application, 17th Sept., 1892
Complete Specification Left, 16th June, 1893-Accepted, 22nd July, 1893
PROVISIONAL SPECIFICATION.
Improvements in Spinning Frames.
I, WILLIAM BRUCE THOMPSON, of Ellangowan, Dundee, in the County of
Forfar, N.B. Engineer, do hereby declare the nature of this invention to be as
follows:-
My said invention has for its object to improve the construction, application,
and action of the driving or list cylinder, in order to reduce the cost of upkeep,
and the variation in the amount of power required in actuating spinning frames.
For example, it is a matter of common knowledge that these machines absorb more
power in the morning when starting, or during damp weather if driven at their
normal speed, than at any other time; this being chiefly due to the lists or belts
contracting while the machine is at rest, and so increasing the pressure on the
bearings.
In carrying out my invention, I support the driving cylinders in bearings, so
adjusted as to be able to move, to a slight extent, about a fixed axis, that is to say
the bearings are carried by levers of any suitable type, which by means of racks,
pinions, and counterweights or their equivalent, keep a fairly uniform tension on
the lists or belts.
According to one modification, the levers may be placed vertically with the
cylinder bearings at their lower extremities, the fulcra between, and the radial
racks at the other extremities, the said racks being controlled by spur pinions on a
shaft on which are pulleys with chains and weights, the combination being such
that the weights acting through the pulleys and other appurtenances, tend to
separate the centre of the driving cylinder and the spindles of the spinning
frame.
Dated this 16th day of September 1892.
GEO. C. DOUGLAS & Co.,
41, Reform Street, Dundee, Agents for Applicant.
COMPLETE SPECIFICATION.
Improvements in Spinning Frames.
I, WILLIAM BRUCE THOMPSON, of Ellangowan, Dundee, in the County of
Forfar, N.B. Engineer, 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 has for its object to improve the construction, application, and
action of the driving or list cylinder, in order to reduce the cost of upkeep, and the
variation in the amount of power required in actuating spinning frames. For
example, it is a matter of common knowledge that these machines absorb more
power in the morning when starting, or during damp weather if driven at their
normal speed, than at any other time; this being chiefly due to the lists or belts
contracting while the machine is at rest, and so increasing the pressure on the
bearings.
The accompanying sheet of explanatory drawings illustrates the method of
carrying out my invention, according to one modification.
The figure represents a part end elevation of the frame of a spinning machine as
fitted with my improvements.
In carrying out my invention, I support the driving cylinders 1. in bearings 2,
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page_text: :
so adjusted as to be able to move, to a slight extent, about a fixed axis 3, that
is to say the bearings are carried by levers of any suitable type, which by means
of racks, pinions, and counterweights or their equivalent, keep a fairly uniform
tension on the lists or belts 4.
According to one modification, the levers 5. may be placed vertically with the
cylinder bearings 2. at their lower extremities, the fulcra 3. between, and the radial
racks 6. at the other extremities, the said racks 6. being controlled by spur pinions 7.
on a shaft 8. on which are pulleys 9. with chains 10. and weights 11, the com-
bination being such that the weights acting through the pulleys and other
appurtenances, tend to separate the centre of the driving cylinder and the
spindles 12. of the spinning frame. In a spinning frame, each driving cylinder 1,
that is to say the cylinder employed to drive one set of spindles 12, may be
supported by two or more sets of levers 5. and the belt tension induced by one or
more sets of weights, pulleys and racks, or their equivalent.
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 :-
In spinning frames:—
(1) The general construction, combination and arrangement of parts, sub-
stantially as and for the purposes herein set forth and illustrated.
(2) The mode of applying tension to the lists or belts by means of adjustable
bearings moving about a fixed axis, as herein before described.
(3) The combination of a radial rack, piuion and counterweight for inducing
tension, as described.
Dated this 15th day of June 1893.
GEO. C. DOUGLAS & Co.,
41, Reform Street, Dundee, Agents for Applicant.