IMPROVEMENTS IN SHAFT LEVEL AND ALIGNERS
Year: 1885

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I, HERBERT JOHN ALLISON, of the firm of Allison Brothers, of 52 Chancery
Lane, London, in the County of Middlesex, Patent Agents, do hereby declare the
nature of said invention for "IMPROVEMENTS IN SHAFT LEVEL AND ALIGNERS
and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement, reference being had to the
accompanying drawings by the letters of reference marked thereon
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The invention relates to improvements in mechanism adapted to ascertain the
departure of shafting from level or alignment, its object being to provide means
whereby such departure can be quickly and readily discovered and it consists in
the construction and combination of two or more similar shaft clamping devices
hereinafter described and pointed out in the appended claims
In the drawings
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Figure 1, is a side elevation of my aligning device
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Figure 2, is a plan view showing the same applied to a shaft for aligning and
levelling the same
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Figure 3, is a side elevation of the same showing it applied differently
Figure 4, is a side elevation of a modification of the device
Figure 5, is a view showing the same in position for use
Figure 6, is a side elevation of the same in a different position.
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A, represents a clamping device composed of the body plate B, hinged or pivoted
clamping bar C, and clamping screw D as shown
The body plate B is provided with the rectilinear edges B1 and B2 at right
angles to each other and respectively provided with the levels b¹ and 6*.
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The edge of the device opposite the edge B³ is cut away to form the arms E, E³,
parallel to the edge B¹ and to each other and the rectilinear edges F, F, which run
at opposite angles of forty-five degrees with the edge B¹ and form with each other
the re-entering right angle fapproximating the edge B' The said arms E, E¹, and
edges F, F, form between them the recess Z
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Gis a centreing-mark on the body plate which mark runs from the edge B² at
right angles thereto to the angle fin the line bisecting said angle,

page_text: The clamping bar C 18 hinged or pivoted at one end c on the end of the arm E¹
or in a recess therein and has its other end passing into a recess in the end of the
arm E, where it is retained, when necessary, by the pin c¹ which passes through
proper openings in the ends of the bar and arm
c³ is a transverse threaded opening in the bar C which opening engages the
clamping screw D which is provided at its outer end with a proper handle d and
on its inner end with a clamping foot d to bear against the shaft Y when the
device is attached thereto.
His a graduated glass tube secured to the body plate perpendicularly to the
edge B The said tube is open above and below and has coupled to its lower end
a rubber tube h.
The edge of the body plate is parallel to the edge B¹, and the screw D,
opening c, angle f, and centreing mark G are midway between said edges, while
this is not essentially necessary it is better in practice.
The rubber tubes h, h, from the devices communicate with a pressure bulb I and
have valves 2 upon them to open and close communication between the glass
tubes H, and said bulb When the valves are open and this pressure bulb is
squeezed, the water will rise to the same level in all the graduated glasses and the
shaft can be levelled in accordance therewith
To level a shaft, one of the described devices is clamped thereon near each of its
bearings and the edges B¹, B¹, of all brought horizontal by the levels 6', 6' The
said edges are all equidistant from the centre of the shaft and the necessary
levelling, if any is required, can be done by using a straight edge with liquid level
attached, and levelling from the edge B¹, of one device to that of the adjacent one
If obstructions intervene the graduated glasses H, H, and tubes h, h, all running
to the same source of liquid supply, can be used In aligning the devices are
clamped on the shaft and the edges B³, brought horizontal by the levels 6* The
centreing marks G, G, will then be vertically over the axis of the shaft and the
aligning can be done from a cord stretched between said marks or between points
equally above or to one side of the same when obstructions intervene
Figure 4 represents a modification of the invention, which consists mainly of
the main frame K, composed of the longitudinal bars L, L¹, and transverse
bars M, M, and the travelling jaws N, N₁, O is a centreing block secured
transversely upon the bar L, midway between the bars M, M¹
The jaws N, N¹, are recessed upon the inner surfaces to fit snugly upon the
bar L, and stand at right angles to the same P is a longitudinal screw having
bearings in the bars M, M, and provided with the right and left threads p, p,
which engage with transverse internally threaded openings in the Jaws N, N³,
respectively.
The jaws and screw are so arranged in relation to each other that the former
will be at all times equally distant from the block O, and will simultaneously
impinge upon its opposite sides when screwed home.
The screw P 18 rotated by means of the lever handle o, in the usual manner
The graduated glass H, has its ends fitted into openings in the end bars M, M³,
and stands partially in front of the bar L³
The jaw N has upon it the level n, which has the same function as the level 6¹,
in the first modification, and n¹ is a level fixed to the bar L, and having the same
function as the level 6*, in the same
Both devices are used in levelling and aligning the shaft in the same manner
The difference in construction does not make a difference in their mode of
operation
Having now particularly described and ascertained the nature of the said
Invention, and in what manner the same is to be performed, I declare that what
I claim is
1. In mechanism to discover the departure from level or alignment of shafting,
the combination of two or more similar devices, adapted to be clamped upon the

page_text: shaft near its bearings and each having a straight edge with an attached level to
bring the said edge horizontal so that the difference in height of the devices, can
be readily ascertained, substantially as specified -
2 In mechanism to discover the departure from level of shafting, a clamping
device provided with a rectilinear edge having a level attached to bring it
horizontal, a recess Z having a right angle the bisecting line of which is parallel
to the rectilinear edge of the clamping device and a clamping screw adapted to
bind the shaft against the edges F, F, of the recess Z with its axis in the same
horizontal plane as the bisecting line of the angle f. substantially as specified
3 In mechanism to discover the departure from alignment of shafting, a
clamping device provided with a rectilinear edge having a level attached to bring
it horizontal, a recess Z having a right angle f, the bisecting line of which 18
perpendicular to the rectilinear edge of the device, a centreing mark made on
the extension of the said bisecting line, and a clamping screw adapted to bind
the shaft against the edges F, F, of the recess Z with its axis passing through the
vertical plane in which the centreing mark lies, substantially as specified
4 In mechanism to ascertain the departure from level of shafting, the
combination of two or more clamping devices A each composed of the body
plate B, clamping bar C, and clamping screw D and each provided with a recess Z,
rectilinear edge B' and level b¹, substantially as specified
5 In mechanism to ascertain the departure from level and alignment of shafting,
the combination of two or more clamping devices A, each composed of a body
plate B, clamping bar C and clamping screw D, and each provided with the
rectilinear edges B¹, B³, levels b¹, b², centreing marks G, and recess Z, substantially
as specified
6 The combination of two or more clamping devices A, each provided with a
graduated glass H connected by a tube h, to a source of liquid supply common to
all the devices, substantially as specified
7 The combination with the bulb I and tubes h, provided with the valves 2, of
the devices A and graduated glasses H, substantially as specified