FIELD OF INVENTION
The present invention relates to an improved device with adjusting means for
supporting a dial test indicator during measurement, inspection and setting a job for
machining. More particularly, the invention relates to a special purpose dial stand or
device to ensure the surface of larger diameter parallel to the bed of the machine to set
the job for machining.
BACKGROUND OF THE INVENTION
In various contexts of science, technology, and manufacturing (such as machining,
fabricating and additive manufacturing), an indicator is one of the various instruments
used to accurately measure small distances and angles, and amplify them to make them
more obvious. The name comes from the concept of indicating to the user that which their
naked eye cannot discern; such as the presence, or exact quantity, of some small distance
(for example, a small height difference between two flat surfaces, a slight lack of
concentricity between two cylinders, or other small physical deviations).
Many indicators have a dial display, in which a needle points to graduations in a
circular array around the dial. Such indicators, of which there are several types, therefore
are often called dial indicators.

Non-dial types of indicators include mechanical devices with cantilevered pointers
and electronic devices with digital displays.
Indicators may be used to check the variation in tolerance during the inspection
process of a machined part, measure the deflection of a beam or ring under laboratory
conditions, as well as many other situations where a small measurement needs to be
registered or indicated. Dial indicators typically measure ranges from 0.25mm to 300mm
(0.015in to 12.0in), with graduations of 0.001mm to 0.01mm (metric) or 0.00005in to
0.001 in (imperial/customary).
Various names are used for indicators of different types and purposes, including
dial gauge, clock, probe indicator, pointer, test indicator, dial test indicator, drop indicator,
plunger indicator, and others.
A dial test indicator, also known as a lever arm test indicator or finger indicator, has
a smaller measuring range than a standard dial indicator. A test indicator measures the
deflection of the arm, the probe does not retract but swings in an arc around its hinge
point. The lever may be interchanged for length or ball diameter, and permits

measurements to be taken in narrow grooves and small bores where the body of a probe
type may not reach.
Dial test indicators are used particularly in machine shops for testing and
ascertaining alignment, size, surface, deflections and other variations in the dimension of
stock or material to be used in machining.
The dial test indicator is a very sensitive and delicate instrument which includes a
feeler for sensing needle adapted to be held in contact with the work being tested, and a
gage with a rotating indicator pointer responsive to the sensing action of the feeler, to
indicate the surface condition of the work being tested. The indicator is capable of sensing
and indicating exceedingly slight variations of the work material from standard variations
which may be measured in thousandths of an inch.
It is obvious that such an instrument must be delicately handled to avoid damage
to it, and also to permit it to record accurate readings. Accordingly, the indicator must be
held firmly and in a steady position relative to the work, to avoid false deflections of the
dial pointer. Its initial setting relative to the work must be made gently, in order to avoid
any forceful or sharp engagement with the feeler of the work. A forceful or sharp
engagement may result in damage to the indicator and subsequent inaccurate readings. A

further requirement is that the initial setting of the indicator should be effected efficiently
and quickly, albeit delicately, so that valuable work time is not wasted.
It is also pertinent that an indicator holder should be capable of deploying the
indicator feeler in a large variety of positions, so that work of all various types and
locations can be tested quickly and accurately, and therefore, it is important that a holder
be adapted to be installed to various important locations.
Previously known indicator holders do not have the versatility that is needed to
accomplish the above described requirements.
The modern day coal fired steam turbine essentially consists of outer casing serving
as the pressure containment element, inner casing with guide blades which along with
bladed rotor provides the steam flow path to name a few. The geometrical feature of the
job varies in dimensions according to rating of Turbine Generator (TG) sets. The accuracy
of the machined job lies in the accuracy of setting the job either parallel or perpendicular
to the machine bed. To ensure the same, the surface to be machined is dialed using dial
indicator clamped in stand which is hydraulically affixed on spindle or ram of the machine.

The smaller length of dial stand constrains the reach of dial on the extreme end of the
jobs.
The current practice to carry the same involves the multi setting of jobs which adds
to cumulative inaccuracies of the dimension to be achieved. The overall process being
unreliable necessitates the development of attachment or fixture to clamp the dial to
check the surface in single setting.
This invention relates to dial test indicator holders, with the general purpose of this
invention to provide an improved holder of this type, which will be more efficient, and
provide more functions than previously known indicator holders.
OBJECTS OF THE INVENTION
Therefore, it is an object of the invention to propose an improved device with
adjusting means for supporting a dial test indicator during measurement, inspection and
setting a job for machining which is capable of providing adequate support to achieve
accurate setting of the job for machining.

Another object of the invention is to propose an improved device with adjusting
means for supporting a dial test indicator during measurement, inspection and setting a
job for machining which is able to hydraulically securing the device on the spindle of the
machine to increase the maneuverability of the device as per reach of the spindle.
A still another object of the invention is to propose an improved device with
adjusting means for supporting a dial test indicator during measurement, inspection and
setting a job for machining which is capable of checking the complete surface of the job in
single setting.
A further object of the invention is to propose an improved device with adjusting
means for supporting a dial test indicator during measurement, inspection and setting a
job for machining which is capable of eliminating cumulative dimensional variation in
machined feature of the job due to error in setting the job.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
Fig. 1: Shows a perspective view of an indicator holding device with adjusting
means with arms C (21), A (6), B (8) and D (24) fixed to each other and a
taper spindle (1) according to the invention.

Fig. 2: Shows the main arm (2) with rectangular slot (30) and thread (28) for being
assembled with the taper spindle (1) according to the invention.
Fig. 3: Shows assembly of arm A (6) with arm B (8).
Fig. 4: Shows assembly of arm C (21) with arm A (6).
Fig. 5: Shows a dial indicator to be fixed in arm D (24).
Fig. 6: Shows assembly of arm B (8) with arm D (24).
Fig. 7: Shows extension arm assembly.
Fig. 8: Shows arms A and 8,
Fig. 9: Shows arm D.
Fig. 10: Shows arm D comprising a plate (10) and a support plate (11) joined
together by bolts and nuts.
DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT OF THE INVENTION
The dial stand is a device (d) to mount the dial at the intended positions during
measurements and setting referencing for and during machining. It consists of a sleeve
taper (1) to which main arm (2) is joined by the means of thread. The extension stud (4)

is bolted to the main arm by using lock nut (3). The jointer (5) is attached to extension
stud to which movable arm C (21) is fixed with bolt assembly so as to maintain the arm in
180 degree position. Another movable arm A (6) is attached to arm C with bolt (7).
Movable Arm B (9) is attached to arm 'A' through bolt (9) so as to maintain it in 270
degree position. The dial gauge with stand is bolted to movable arm to serve the purpose.
Referring now to the Fig. 1 in detail, it will be seen that the device (d) of the
invention comprises of
Item 1: Taper Sleeve Item 2: Main arm
Item 3: Lock nut Item 4: Extension stud
Item 5: Jointer Item 6: Movable arm "A"
Item 7: Bolt M10 Item 8: Movable arm "B"
Item 9: Bolt M10 Item 10: Plate
Item 11: Support Plate Item 12: Bolt M10
Item 13: Bolt M10 Item 14: Nut
Item 15: Bolt M10 Item 16: Nut
Item 17: Nut Item 18: Nut
Item 19: Lock Nut Item 20: Dial gauge
Item 21: Arm"C" Item 22: Nut

Item 23: BoltMlO Item 24: ArrrTD"
Item 25: Thread Item 26: Collar
Item 27: Extension Item 28: Threaded connection
Item 29: Threaded hole Item 30: Rectangular slot
Item 31: Through hole Item 32: Extension
A taper sleeve (1) that moves inside the machine spindle and is hydraulically
clamped to the machine giving a firm base to the whole indicator stand. The integrated
collar (26) on taper sleeve (1) provides uniform support by distributing the clamping
forces over the surface of the machine. Other end of the taper sleeve (1) have a hollow
cylindrical extension (27) with inside diameter having threads(25); the taper sleeve (1)
that gets inserted in the machine spindle provides the device (d) a 360° rotation about
longitudinal axis of taper sleeve (1).
Main arm (2) have a cylindrical extension (28) with outside diameter having
threads. The main arm (2) assembles with the taper sleeve (1) through a threaded
connection (28) as the threads (25) of taper sleeve (1) and Main arm (2) matches;
Lock nuts (3) is assembled by a threaded connection with main arm (2) so as to
prevent vibration from loosening a bolted joint or in other words to lock main arm (2) in
the taper sleeve (1);

The other end of the main arm (2) have a rectangular slot (30) along its transverse
axis;
The main purpose having a separate main arm (2) and not making it an integral
part of the taper sleeve (1) is that if there is a measurement requirement that calls for a
longer arm length, an extension stud (4) as shown in Fig. 7 of a meter or two meter (as
required) can be attached as an extension such that one end of the extension stud (4)
makes threaded connection with taper sleeve (1) and other end of the extension stud (4),
through a jointer (5) that provides internal diameter, makes threaded connection with
main arm (2);
Lock nuts (19) is assembled by a threaded connection with extension stud (4) so as
to prevent vibration from loosening a bolted joint or in other words to lock extension stud
(4) in the taper sleeve (1).
The rectangular slot (30) in the main arm (2) is having a threaded hole (29) along
its longitudinal axis and perpendicular to the rectangular slot axis;
As shown in Rg.l Arm 'C (21) makes a kinetic pair of prismatic type with main arm
(2) such that it can slide in the rectangular slot (30) in the main arm (2) so as to have a
varying length as per the measurement requirement;

After the length of Arm X' (21) in main arm (2) is fixed, it is withheld at its position
using a M10 bolt (7) that makes threaded connection with main arm (2) through the
threaded hole (29) at the longitudinal axis end and perpendicular to the rectangular slot
axis of the main arm (2);
As shown in Fig.l, Arm 'C (21) is mechanically coupled with movable arm 'A' (6)
through a hinge arrangement using a M10 bolt (23) and corresponding nut (22) separately
shown in (Rg. 4) such that the arm A is free to rotate 180° in the plane of paper;
As shown in Fig.l, Arm W (6) is mechanically coupled with movable arm 'B' (8)
through a hinge arrangement using a M10 bolt (9) and corresponding nut (17) separately
shown in (Rg. 3) such that the arm 'B' is free to rotate 180° in the plane of paper;
As shown in Fig. 1, Arm *B' (8) is mechanically coupled with arm *D' (24) through a
hinge arrangement using a M10 bolt (15) and corresponding nut (18) separately shown in
(fig.6) such that the arm *D' is free to rotate 180° in the plane of paper;
As shown in Fig. 10, Arm 'D' (24) constitutes in itself a plate (10) and a support
plate (11) joined to each other through multiple threaded joints through M10 bolts (12,
13) and corresponding nut (14, 16);

Plate (10) and support plate (11) constitutes in themselves a semicircular hole
located in such a way that it converts into a through hole after the assembly of Arm 'D'
(24) is completed;
Dial gauge (20) is held firmly in the through hole (31) in arm 'D' (24).
The rotary action provided by the hinged arrangement will permit 180° rotation of
the device arm A (6) and arm B (8) to be deployed to a great variety of positions of the
dial indicator for example, and then the final accurate adjustment is made by means of
the hinged arrangement of Arm V (24) that permits 270° rotation of Arm V (24), and the
angular displacement of complete 360° of the complete dial indicator holder about the
longitudinal axis of taper sleeve (1) through the taper sleeve (1) which is inserted in the
spindle of a machine and the length adjustment provision by using an extension stud (4),
as herein desaibed. Further adjustment in the size of the dial indicator and any other
measuring instrument can be accommodated by tightening or loosening of threaded joints
that use M10 bolt, (12, 13) and corresponding nut (14, 16). Thus, an infinite variety of
positions can be obtained with this invention, and which positions can be firmly
maintained to provide accurate sensing or testing means to accuracies up to microns.

It is further important to note that in addition to providing and maintaining these
various adjustable positions, the holder is adapted to receive an indicator in only one
position by the provision of a threaded joint which completely rules out multiple setting of
the instrument and the device, providing an even further versatile arrangement.
Since, it is now apparent that the embodiment of the invention, as described
hereinabove, will provide an extremely adjustable and Arm holder for a sensitive dial
indicator.
The foregoing is considered as illustrative only of the principles of the invention.
Further, since numerous modifications and changes will readily occur to those skilled in
the art, * is not desired to limit the invention to the exact construct and operation
snown and described, and accordingly all suitable modifications and equivalents may be
resorted to, falling within the scope of the invention as claimed.

WE CLAIM
1. An improved device (d) with adjusting means for supporting a dial test indicator
during measurement, inspection and setting a job for machining, the said device
comprising;
a taper sleeve (1) having an integrated collar (26) for inserting into the machine
spindle for providing the said device a 360° rotation about longitudinal axis of the said
taper sleeve (1) and the said sleeve (1) having cylindrical extension (27) with inside
diameter having threads (25);
a main arm (2) having a cylindrical extension (32) with outside diameter having
threads (28) assembled to the said taper sleeve (1) and locked by a lock nut (3) for
preventing vibration, the said arm having a rectangular slot (30) along its transverse axis,
the said slot (30) in the main arm (2) having a threaded hole along its longitudinal axis
and perpendicular to the slot axis for allowing a bolt (7) to pass through;
an Arm 'C' (21) assembled to the main arm (2) slidably in the said rectangular slot
(30) for having a varying length according to measurement requirement and withheld at
its position by the bolt (7);
an Arm A (6) mechanically coupled with arm 'C' (21) through a hinge arrangement
by bolt (23) and nut (22) allowing arm A (6) free rotation of 180° in the plane of paper;

a moveable arm B (8) mechanically coupled with arm A (6) through hinge
arrangement with bolt (9) and nut (17) making arm B (8) to rotate 180° freely in plane of
paper;
an Arm D (24) mechanically coupled with arm B (8) through hinge arrangement
with bolt (15) and nut (18) making D (24) to rotate 180° freely in the plane of paper;
wherein
arm 'D' (24) is constituted with a plate (10) and a support plate (11) joined to each
other through multiple threaded joints through bolts (12, 13) and nuts (14, 16) when said
plate (10) and said support plate (11) constitutes in themselves a semicircular hole located
in such a way that it converts into a through hole after the assembly of arm D (24) is
complete wherein a dial gauge (20) is held firmly in a through hole (31) of arm D (24).