An Apparatus for Determining the Vertical Position of Cranks and Crank-shafts of All Kinds, and for Measuring the Angle of Rotation of Axles, and the Angle of Lead of Eccentrics.
Year: 1895

page_text: Date of Application, 29th July, 1895
2000
Date of Application, 29th July, 1895
Complete Specification Left, 29th Apr., 1890–Accepted, 29th Aug., 1896
PROVISIONAL SPECIFICATION.
An Apparatus for Determining the Vertical Position of Cranks and
Crank-shafts of All Kinds, and for Measuring the Angle of
Rotation of Axles, and the Angle of Lead of Eccentrics.
I, JAKOB KUNTZ, of Montigny near Metz, in the Empire of Germany, do hereby
declare the nature of this invention to be as follows:-
The apparatus comprises a socket or bearing in which is loosely mounted a short
axle having pointed ends, a graduated disc, a double index hand and three plumb
lines. The index hand and the disc are loosely mounted on the socket or bearing,
but are capable of being fixed thereto. One of the plumb-lines is suspended from
the centre of the index hand, while the other two plumb-lines hang from studs or
their equivalents on the graduated disc near the periphery thereof at equal distances
from the centre thereof. The apparatus is carried by any suitable bracket adapted
to be fixed to the crank.
The apparatus in use is fixed with the centre of the socket or bearing coinciding
with the centre of the shaft, the exact position being verified by the introduction
of one of the ends of the pointed axle in the "centre
"
of the shaft.
To determine the vertical position of a crank, the two plumb-lines suspended
from the graduated disc are caused to touch simultaneously the periphery of the
shaft by rotating the disc. When the index hand is perpendicular (the initial
position) the other plumb-line suspended from the index hand passes through the
centre of the shaft.
For measuring the angle of rotation when the crank is in a vertical position, the
graduated disc is fixed in such a manner that the index hand indicates an angle
of 90° with the perpendicular. After the rotation of the shaft the index hand is
again placed perpendicular and in case of necessity locked in place. The angle of
rotation can then be calculated by the graduations on the disc. In the same
manner it is possible to determine the angle made by two cranks on one axle. To
this end when the crank is perpendicular it is sufficient to fix the apparatus to the
other crank and pull it round until the index hand corresponds with the previous
reading on the disc.
To measure the angle of rotation when the crank is in any other position than
vertical, when the index hand is perpendicular the graduated disc is rotated to the
division of 90° and it is fixed in place. After the rotation of the shaft proceed as
hereinbefore described.
The apparatus may also be employed for measuring the angle of lead of
eccentrics.

page_text: intermediate piece 9 has two lateral extensions t in opposite directions. The free
extremities of these extensions are bent at a right angle and provided with a
screw held by its point in the piece 9, in such a manner as to allow the rotation
of the screw without longitudinal displacement of the same.
On the screw are two nuts a sliding with their part a¹ in a longitudinal groove
made in the lateral extensions t.
The turning of the screws v by means of their buttons v¹ produces the bringing
together or the separation of the nuts a which causes the parts ¹ to press against
or to release the pivot C.
TO MEASURE THE ANGLES OF ROTATION:
(a) Starting from the vertical position of the crank, the graduated disk c is
fixed so that the needle d made vertical, indicates an angle of 90°. After the
rotation of the axis or of the shaft, the needle is again made vertical, and it may,
if necessary, be fastened in that position. The angle of rotation may then be read
on the disk, noticing the graduation. In a similar way, the angle, formed by two
cranks on the same axis, may be determined. For this purpose, when the crank is
vertical, it is sufficient to screw the apparatus to the other crank and to bring the
latter into the vertical position after putting the graduated disk at the right point.
(b) Starting from any position.
In the position of the shaft, the relation of which has to be determined, when the
needle d is vertical, the graduated disk c is placed on a division of 90° and fastened
there. After the revolution of the shaft, the proceeding is the same as described
under (a).
The use of the apparatus in connection with a second one for measuring the
angle of lead of eccentrics is represented by Figs. 9 and 10.
The ordinary apparatus is fastened to the eccentric gap pin which is represented
in the horizontal position.
The second apparatus is fixed by means of a bar h, a corner piece i and a screw j
near the periphery of the eccentric wheel in such a manner as to make the edge
line of the bar h correspond with the centre line z-z.
The second apparatus is composed of a graduated disk loosely mounted along
with a double needle m on the bar h, a plumb line w suspended at the periphery of
the disk at a point marked 90°, and a finger k secured at the free end of the bar h
in front of one end of the needle m.
The movement of the eccentric causes the bar h to remove from its horizontal
position while the disk and the needle m remain in the same relative position
regarding to the horizontal one. The finger k of the bar h indicates on the disk 1,
the angle of lead of the eccentric.
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 :-
1. An apparatus for determining the vertical position of cranks and crank-shafts
of all kinds and for measuring the angles of rotation of the axes, distinguished by
a socket a, a centre-punch b, moveable in this socket, a graduated disk c, a
double needle d, plumb-lines e, f, g, and an intermediate piece q, the whole as
described and shewn in the accompanying drawings.
2. An apparatus employed in connection with the above claimed one, for
measuring the angle of lead of eccentrics, distinguished by a bar h with corner
piece i and screw j, a disk / and a double needle m pivotably attached to the said
bar, a plumb-line n and a finger k, as described and represented.
Dated this 28th day of April 1896.
L. DUVINAGE,
Agent for Applicant.