An Improved Slide for Measuring Rules, Gauges, and other Measuring Instruments.
Year: 1894

page_text: Date of Application, 16th Mar., 1894
Complete Specification Left, 15th Dec., 1894-4ccepted, 16th Mar.,
1895
TRUYIDIUAAL
An Improved Slide for Measuring Rules, Gauges, and other
Measuring Instruments.
We, WALTER JOHN AITKEN PARKER of Featherstone Road Kings Heath
in the County of Worcester Engineer and JOHN PARKER of Featherstone Road
Kings Heath in the county aforesaid, Sanitary Engineer, do hereby declare the
nature of this invention to be as follows:-
This invention relates to an improved slide for measuring rules, gauges, and
other measuring instruments and consists principally in combining with a flat steel
measuring rule a slide whereby the depth of a groove or cavity may be measured
with accuracy, the said slide and rule wheu marked with inches and logarithmic
scale will constitute a slide rule, which are usually made of of wood, ivory and
the like.
By our invention we are enable to apply a steel slide to a flat steel rule in a
cheap and expiditious manner, and at the same time make an efficient measuring
instrument by which constant accuracy of dimension can be ensured.
Our said invention can be applied with great advantage to various kinds of flat
steel gauges, and will enable the same being used for determining the depth of
grooves or cavities or the internal diameters of cylindrical work and for surfaces
between any two points.
'In carrying our said invention into practice we provide an ordinary flat steel
measuring rule, near one end we cut a short longitudinal slot into which we fit
accurately a length of cylindrical tube of small diameter tube in such a manner
that one-half or nearly one-half of its diameter will be exposed on one of the flat
sides of the said rule and the other on the opposite side of the rule forming a
D shaped guide. We furnish the guide on the upper side of the rule with a slide
of the same sectional shaped, made from a length of half round steel wire, one end
terminating into a bifurcated pointer, the surface of the said slide being marked
with a similar scale to that of the ordinary slide rule. On the under side of the
rule projects the remaining half of the tubular guide aforesaid into which we fit a
short length of D shaped wire slightly tapering longitudinally forming a D shaped
wedge the function of which is to fix the slide aforesaid in any desired position
which is effected by pressing the larger end forward. The D shaped wedge being
a little longer, the guide is provided at each end with a teat so as to prevent it
from slipping out of the guide.
It will thus be apparent that when the slide is adjusted to its desired position the
pressing forward of the wedge aforesaid will draw the cylindrical tube tightly on
the face of the slide, pressing the under surface thereof on the face of the rule and.
thus fixing it in position.
We
e may in some cases dispense with the D shaped wedge and use a suitable
clip for the purpose of fixing it in position.
Our said invention may, by slight modification be applied to any form of flat,
steel gauge or other measuring instruments, by extending the slide the same may.
be used for taking external diameters of cylindrical work.
Dated this 15th day of March 1894
WILLIAM HENRY BARACLOUGH,
36, Temple Street, Birmingham, Agent for the Applicants.

page_text: An Improved Slide for Measuring Rules, Gauges, and other
Measuring Instruments.
We, WALTER JOHN AITKEN PARKER of Featherstone Road, Kings Heath,
in the County of Worcester, Engineer, and JOHN PARKER of Featherstone Road,
Kings Heath, in the county aforesaid, Sanitary Engineer 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 :-
This invention relates to an improved slide for rules, gauges and other measuring
instruments and consists principally in combining with a flat steel measuring rule
a slide whereby the depth of a groove or cavity may be measured with accuracy,
the said slide and rule when marked with inches and logarithmic scale will
constitute a slide rule, which is usually made of wood, ivory and the like.
By our invention we are enabled to apply a steel slide to a flat steel rule in a
cheap and expeditious manner and at the same time make an efficient measuring
instrument by which constant accuracy of dimensions can be ensured.
Our said invention can be applied with great advantage to various kinds of flat
steel gauges and will enable the same to be used for determining the depth of
grooves or cavities or the internal diameters of cylindrical work or the distance
between
any two points.
In carrying our said invention into practice we provide an ordinary flat steel
measuring rule, near one end we cut a short longitudinal slot into which we fit
accurately a length of cylindrical tube of small diameter in such a manner that,
one half or nearly one half of its diameter will be exposed on one of the flat sides
of the said rule and the other on the opposite side of the rule forming a D shaped
guide. We furnish the guide on the upper side of the rule with a slide of the same
sectional shape made from a length of half round steel wire one end terminating in
a bifurcated pointer, the surface of the said slide being marked with a similar
scale to that of an ordinary slide rule.
On the under side of the rule projects the remaining half of the tubular guide
aforesaid into which we fit a short length of D shaped wire slightly tapering
longitudinally forming a D shaped wedge, the function of which is to fix the slide
aforesaid in any desired position which is effected by pressing the larger end
forward. The Ď shaped wedge being a little longer than the guide, is provided
at each end with a teat so as to prevent it from slipping out of the guide.
It will thus be apparent that when the slide is adjusted to its position the pressing
forward of the wedge aforesaid, will draw the cylindrical tube tightly on the face
of the slide, pressing the under surface thereof on the face of the rule and thus
fixing it in position.
We may in some cases dispense with the D shaped wedge and use a suitable clip
or a spring attachment for the purpose of fixing the slide in any position.
Our said invention may by slight modifycation be applied to any form of flat
steel gauge or other measuring instrument by extending the slide the same may be
used for taking external diameters of cylindrical work.
We will now proceed to describe our invention by reference to the accompanying
drawings, the letters of reference indicating similar parts throughout.
Figure 1 illustrates a front elevation; Figures 2 and 3 back elevation and
Figure 4 an end elevation and Figure 5 a section of our invention applied to an
ordinary four inch steel rule.
Figures 6 to 11 show detail parts and modifications of our invention.
Figure 12 shows our invention applied to another form of measuring instrument.

page_text: Figure 2 shows an ordinary rule having a longitudinally slot B, into which is
fitted accurately a short length of tube C, shewn separately at Figure 6.
D is a slide which may be plain or marked in a similar manner to the rule and
has a sliding movement in the upper half of the tube C, the upper end of the slide
terminates in a bifurcated pointer E E, into the under half of the tube C, on the
under side of the rule is fitted a wedge shaped slide F, provided with teats H, H,
to prevent it slipping out of the tube. When it is desired to determine the depth
of a hole as shown at J, Figure 1 the wedge shaped slide F is pressed downwards
to release the slide which is also pressed downwards into the hole until the depth
is obtained. The pointers E, E, indicate the depth, thus the distance between K,
and M, will give the depth of the hole J, the slide may be fixed in this position
by pressing the wedge shaped slide F upwards, the large end N, wedging the under
half of tube C and drawing the upper half of the tube thereof tightly on the
slide D and fixing it in the position indicated. Figure 8 shows the tube C made
of a different section to that illustrated in Figures 1, 3, 4 and 5 which may be
placed in the longitudinal slot B of the rule and a half round slide D used with a
Hat wedge shaped slide operating in the manner described in Figures 1, 3, 4 and 5
or we may invert the tube C and use a flat slide D and a half round wedge shaped
slide F.
Figure 9 shows the tube C rectangular in shape which may be placed in the
longitudinal slot B and a flat shaped slide D and a flat wedge shaped slide F.
In Figure 10 is illustrated a square shaped tube C furnished with a flat slide D
and a flat spring F2 in place of the wedge shaped slide F (previously described in
reference to Figures 1, 3, 4 and 5) the function of the spring F' is to keep the
slide D pressed on to the rule, the pressure being regulated by moving the spring
up or down in the tube C, the teat H and the turned up part of the spring H³
preventing it from slipping out of the tube C.
In Figure 11 is illustrated a D shaped tube C showu at Figure 8, furnished with
&D shaped slide D and a curved spring F in place of the one previously described,
for adjusting and fixing the slide D in any position, the turned up ends of the
springs H, H, prevent it slipping out of the tube C.
We may apply our invention to any desired form of flat steel gauge or other
measuring instrument such for example as shown at Fig. 12, which illustrates a
measuring instrument for taking external measurements.
The body of the instrument is furnished with a slot B, into which is fitted a
length of tube C, provided with a slide D, operating in the same manner as
hereinbefore described in reference to Figures 1, 2, 3, 4, and 5.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what we
claim is
An improved slide for rules, gauges, and other measuring instruments substan-
tially as and for the purpose hereinbefore described and illustrated in the
accompanying drawings.
Dated this 3rd day of December 1894.
WILLIAM HENRY BARACLOUGH,
36, Temple Street, Birmingham, Agent for the Applicants.