IMPROVEMENTS IN AUTOMATIC REGULATING BRAKE GEAR to be as follows:
Year: 1884

page_text: PROVISIONAL SPECIFICATION.
I WILLIAM GREIO of Dartford Creek Paper Mills in the county of Kent do
hereby declare the nature of the said invention for "IMPROVEMENTS IN AUTOMATIC
REGULATING BRAKE GEAR to be as follows:-
"
This invention is specially designed to regulato automatically the tension upon
rolls of paper when unwinding, as it is important to relax the brake pressure as
the diameter of the roll decreases; I do not however restrict it to that one
application as it is evident that it can be used for a variety of purposes, and can
where required be arranged to gradually increase the brake pressure instead of
relaxing it.
A suitable framing which may be of cast iron carries the mechanism, the chief
features of which are as follows.-
To the brake lever is connected a screwed rod upon which is a long nut journalled
in the framing and having a handwheel keyed or otherwise secured to it; free to
turn upon the nut between its bearings and the hand-wheel is a worm-whoel having
a V or equivalent groove in its face in which is the head of a bolt which passes
through a hole in the hand wheel and has a thumb-nut upon its screwed end.
As a direct joint between the brake lever and the screwed rod is apt to be too
rigid I find it well to place a shackle upon the brake lever with one or more
springs interposed, the portion of the shackle which bears upon the lever being
preferably rounded to give free play, the screwed rod is then jointed to the
shackle.
The device for connecting these two wheels may be varied but the one just
described is simple and effective.
A shaft journalled in the framing carries a worm which gears with the worm-
wheel, and upon the shaft is a pulley driven by a band from the shaft of the brake
pulley which drives the roll of paper, or the motion may be imparted in other
convenient manner. The operation is as follows:-
As the paper unwinds the worm shaft is revolved, turning the worm wheel
which being screwed up to the hand wheel by the thumb-nut drives round the
main nut and so cause the screwed rod to release the brake levor. This may be
done very gradually and the sizes of the pulleys and proportions of the gearing can
be arranged to give the requisite speed.
For primary adjustment or release the thumb-nut may be slackened and the
main nut revolved rapidly by the hand wheel.
DL: TOLL
1004

page_text: I WILLIAM GREIG, Dartford Creek Paper Mills, Kent do hereby declare the
nature of invention for "IMPROVEMENTS IN AUTOMATIC REGULATING BRAKE GEAR,"
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 specially designed to regulate automatically the tension upon
rolls of paper when unwinding, as it is important to relax the brake pressure as
the diameter of the roll decreases: I do not however restrict it to that one
application as it is evident that it can be used for a variety of purposes, and can
when required be arranged to gradually increase the brake pressure instead of
relaxing it.
A suitable framing which may be of cast iron carries the mechanism the chief
features of which are as follows:-
:
To the brake lever is connected a screwed rod upon which is a long nut journalled
in the framing and having a hand wheel keyed or otherwise secured to it; free to
turn upon the nut between its bearing and the hand-wheel is a worm wheel
having a V or equivalent groove in its face in which is the head of a bolt which
passes through a hole in the hand-wheel and has a thumb-nut upon its screwed end.
As a direct joint between the brake lever and the screwed rod is apt to be too
rigid, I find it well to place a shackle upon the brake-lever with one or moro
springs interposed, the portion of the shackle which bears upon the lever being
preferably rounded to give free play; the screwed rod is then jointed to the
schakle.
The device for connecting these two wheels may be varied but the one just
described is simple and effective.
A shaft journalled in the framing carries a worm which gears with the worm
wheol and upon the shaft is a pulley driven by a band from the shaft of the roll
of paper or the motion may be imparted in other convenient manner-The
operation is as follows:-
As the paper unwinds the worm shaft is revolved, turning the worm-wheel
which being screwed up to the hand wheel by the thumb-nut drives round the
main nut and so causes the screwed rod to release the brake lever this may bo
done very gradually and the sizes of the pulleys and proportions of the gearing can
be arranged to give the requisite speed.
For primary adjustment or release the thumb nut may be slackened and the
main nut revolved rapidly by the hand wheel.
In the accompanying drawings Fig I is a sectional elevation showing how this
invention may be carried into effect; Figure 2 is a plan and Figure 3 a view of
the spring attachment to the brake lever.
A is the brake lever B the screwed rod and C the nut journalled in the
framing D; E is the hand wheel keyed or otherwise secured to C and F the
worm wheel free to revolve upon the nut C A rigid connection may be made
between the wheels E and F when required in any suitable manner as by the
bolt G whose head is free to move in the groove F¹ but without coming out of it;
a thumb nut or equivalent G¹ serves to fasten the two together when screwed up
or leaves them independent of each other when unscrewed..
H is a worm gearing with wheel F and driven in any suitable manner from the
roll of paper (when the invention is used in connection therewith) or its spindle so
that the worm H shall revolve regularly with the roll, the proportionate speed
being adjusted as required to suit cach case,

page_text: In Figure 2 the worm H is shown as part of the spindle I which carries the
pulley K driven by a belt from the roll of paper on its spindle.
When the machine is running the thumb nut G₁ is screwed homo thus uniting
wheels E and F and nut C so that all move together.
The result is that as the worm H revolves it turns the worm wheel F hand
wheel E and nut C thus raising or lowering the screwed rod B and brake lever A
and in the case of the roll of paper relaxing the pressure as the diameter of the roll
decreases.
In starting the apparatus or where it is required to rapidly adjust the position
of the lever A the thumb nut G¹ is slackened and the hand wheel E can then be
rapidly revolved by its handle E¹, turning the nut C with it & till the required
adjustment is obtained when G¹ can be tightened again.
As I have found that a direct joint between A and B as shewn in Figure 1 is apt
to be too rigid and unaccomodating, I can where required employ a shackle L
Figure 3 through the opening in which pass the end of the brake lever A and the
spring M the joint A¹ being placed on the shackle as shown. The lower inside
edges of the shackle are preferably rounded off as shown at L¹ to facilitate the
working, and the joint A¹ could be dispensed with but I prefer to use it to make
the motion as smooth as possible.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I claim in an
automatic regulating brake-gear
1. The combination with brake lever A of screwed rod B and nut C the motion
of said nut being controlled by the roll of paper or other object to be braked
substantially in the manner and for the purpose specified.
2. The combination with brake lever A of the shackle L and spring M substan-
tially as and for the purpose specified.
Dated 10th dow of Desemba 1004