An Appliance for Steadying the Index Finger of Registering Dials of Weighing Machines, Steam Pressure Gauges, Vacuum Gauges, and the like.
Year: 1890

page_text: Date of Application, 27th Feb., 1890
Complete Specification Left, 19th Nov., 1890-Accepted, 17th Jan., 1891
PROVISIONAL SPECIFICATION.
An Appliance for Steadying the Index Finger of Registering Dials
of Weighing Machines, Steam Pressure Gauges, Vacuum Gauges,
and the like.
ALEXANDER WOOD, 10 Stockwell Street, Glasgow, and THOMAS DAVIES, 297 Main
Street, Bridgeton, Glasgow, Weighing Machine Makers, do hereby declare the nature
of this invention to be as follows:-
The object of our invention is to prevent excess of motion or vibration of index
finger of all self-registering dial indicators whether used in connection with a lever
weighing machine, or in the case of a spring balance where used separately or
independently, and more especially when used for weighing live weight, such as
cattle, sheep, or other creatures, and upon other dials, such as steam pressure gauges,
vacuum gauges, and any others where the clear and distinct registration of the index
finger is necessary. To overcome the vibration we add a wheel with floats or some
other arrangement to act as a brake and to control the motion of the index finger;
This wheel is partly or wholly immersed in water or other liquid or combination of
liquids, and is carried upon the same spindle as the index finger, or is connected
therewith in some convenient way.
Dated this 27th day of February 1890.
A. G. PRITCHARD,
Agent for Applicants.
COMPLETE SPECIFICATION.
An Appliance for Steadying the Index Finger of Registering Dials
of Weighing Machines, Steam Pressure Gauges, Vacuum Gauges,
and the like.
We, ALEXANDER WOOD, 10 Stockwell Street, Glasgow, and THOMAS DAVIES
297 Main Street, Bridgeton, Glasgow, Weighing Machine Makers, 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:-
The object of our invention is, to prevent excess of motion or vibration of index
finger of all self-registering dial indicators whether used in connection with a lever
weighing machine, or in the case of a spring balance where used separately or
independently, and more especially when used for weighing live weight, such as
cattle, sheep, or other creatures, and upon other dials such as steam pressure gauges,
vacuum gauges, and any others where the clear, and distinct registration of the index
finger is necessary. To overcome the vibration we add a wheel with floats or some
other arrangement to act as a brake and to control the motion of the index finger;
This wheel is partly or wholly immersed in water or other liquid or combination of
liquids, and is preferably carried upon the same spindle as the index finger, or is
connected therewith in some convenient way.
And in order that our said invention may be properly understood we have here-
nnto appended an explanatory sheet of drawings whereon
Fig. 1. is a front view, partly in section, of a dial indicator for weighing
machiues.
Fig. 2. is a vertical section on the line X-Y Fig. 1.
2 a vertical cortion of a tank

page_text: Fig. 6. a side elevation of a paddle or float wheel.
b
As will be seen from Figs. 1. 2. & 3. of the annexed drawings the invention
consists in fitting a paddle wheel a upon the spindle carrying the index finger c of
the dial indicator. d is the dial plate shown broken away at Fig. 1. The paddle
wheel a is or may be made of light metal such as brass, tin, or copper or other suitable
material or substance. It is, as shown, cut away at e for lightness. The paddles or
floats may be, as shown, arranged at intervals around the body a of the paddle
wheel. They are or may be soldered or otherwise secured in place. The paddle
wheel a is enclosed in a cylindrical or other suitable tank g. which is loose on the
spindle b and may be made with the upper part gl removable so as to fill in liquid s
or for other purposes. The parts 9, 9' may be bolted together as shown. To prevent
the liquid, s, taking the motion of the wheel a when the latter is revolving, a number
of blades or stops may be fitted to the inner circumference of the tank.
In Figure 3, the spindle is shown as passing through short projecting sleeves or
collars on the tank g, which are provided for the purpose of preventing the liquid
escaping when the tank is, at any time, laid on its side as shown at Fig. 4. The
sleeves are of a length just sufficient to prevent the liquid passing over their inner
edges when the tank is laid down.
In Fig. 5. a tank g is shown which is fitted to the spindle of the indicator. The
tank has inwardly projecting floats or boards f¹. In this case the tank g revolves
with the spindle the liquid, in finding its own level, offering sufficient resistance to
absorb or counteract the vibration of the index finger. Instead of having a tank
made as shown in Fig. 5. the tank g, and the paddle wheel a Fig. 1. may be used, the
wheel and tank being both rigidly secured to the spindle b; or the tank g. may
alone be rigidly secured to the spindle 6 the paddle wheel a being loose on the
spindle.
In Fig. 6. a paddle wheel is shown with floats (dotted) between the two sides g²
as in the case of an ordinary water wheel. This form of wheel or any other well-
known or suitable construction of paddle or float wheel may be used in lieu of those
shown at Figs. 1. 2. 3. & 4.
The tank Fig. 1. may be held in position by brackets j and it may also be
provided with an overflow pipe k and a chain pipe ĭ.
It is to be understood that although we have shown by way of illustration, different
constructions of paddle wheel, we do not confine myself thereto as any other suitable
construction of paddle wheel or equivalent may be used.
The wheel with tank may be made to work horizontally. In this case the paddles
or floats would be bent or turned down so as to dip into the liquid as indicated in
dotted lines at Fig. 4.
The spindle carrying the float wheel and tank may be operated from any suitable
part of the machine, gauge or the like apparatus or appliance to which the invention
is applied. The liquid used is preferably water although any other liquid or com-
bination of liquids may be used if desired.
If desired the paddle or float wheel may be fitted or connected to any other
suitable part of the machine or gauge than the spindle carrying the index finger.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is
1. A paddle or float wheel substantially as and for the purpose set forth.
2. The combination with a paddle or float wheel of a tank containing a liquid or
combination of liquids, substantially as and for the purpose set forth.
D11
1711 1
T
1000
H. D. FITZPATRICK,
70, Wellington Street, Glasgow, Agent.