Improvements in Taps and Rimers for Tapping and Riming Nuts.
Year: 1886

page_text: Date of Application, 14th Apr., 1886.
Complete Left, 14th Jan., 1887
Complete Accepted, 14th May, 1887.
Nurnberg, Germany, Foreman.
Improvements in Taps and Rimers for Tapping and Riming Nuts.
IWALTER BRIERLEY, Town Hall Buildings Halifax in the County of York Patent
Agent do hereby declare the nature of this invention to be as follows:-
This invention relates to improved combined taps and rimers designed for tapping
and riming various size of holes by aid of one instrument.
These improvements refer to taps which produce the screw threads in cuts from one
end to the other of samo and in one cut.
These improvements consist in the application of one or several taps at various
distances having obtuse cones with their conical part very prominent, or of a form
similar to such cones, at the lower end of the cylindrical part of the taps and rimers,
the cylindrical guide part thereof, or stud facilitating the commencement of the tapping
process.
The cone and also the succeeding cylindrical parts are provided with an undeveloped
thread.
When the tap has several succeeding short cones the guide stud is not absolutely
necessary although it is always useful. The short cone at the working end of the tap
must not exceed three threads, this cone is of great importance with regard to ordinary
taps in the form of a slender cone, the width of the cut being greatly diminished but
the thickness of same increased.
By this change in the sectional dimensions of the cut, a saving of labour in tapping
a nut is effected, and the production is consequently increased, because such a tap
being very short a nut is by means of only a few turns readily tapped.
The further result of the application of a short cone at the working end of the tap
is that by tapping nuts of different thickness or width, it prevents the increase of the
width of the cut as soon as the cone bas entered as far as its greatest diameter.

page_text: These taps with only one short cone are used for tapping nuts of soft metal such as
brass, cast iron, soft wrought iron etc.
For tapping nuts made of hard metals such as ordinery wrought Iron, Steel etc.
taps with two or more short cones, placed at various distances from each other are
applied.
By applying several cones with following cylindrical fillet-parts any changes in the
thickness and width of the cut can be made so that a corresponding distribution of the
cut in accordance with the strength of the metal of which the nuts are made is pro-
duced by means of utilizing the differences in the diameters of the cylindrical fillet-
parts and the slight differences in the more or less conical formation of the cones.
Likewise with such a tap and for purpose of a better distribution of the cut, at the
front or incompletely tapped end, a second thread of any section can be cut.
By the use of the rimers which at their lower part are formed like the taps, an
undeveloped thread is cut first in the hole which has to be rimed out, this undeveloped
thread is removed again by the further advance of the rimer. The process of cutting
this thread is exactly the same as by the application of the tap.
The use of these rimers also produces a diminution in the width of the cut and
an increase in thickness of same at the same time a more favourable formation in
the sectional dimensions of the cut is obtained with the result of very considerable
less labour than by the use of other rimers, moreover the rimer is forced at each turn
to advance the distance of a thread so that the troublesome pressing in of the rimer
is obviated. The riming of the hole is accomplished in one cut by means of a con-
tinuious turning of the rimer in one direction. Any difference in the depth of the
hole the same as by the process of tapping does not increase the size of the cut.
The application in succession of several fillet parts and rimers takes place when the
hole is very short and when it has to be greatly enlarged.

page_text: Improvements in Taps and Rimers for Tapping and Riming Nuts.
I, WALTER BRIERLEY of Town Hall Buildings, Halifax in the County of York
Patent Agent, do hereby declare the nature of the said invention for "IMPROVEMENTS
IN TAPS AND RIMERS FOR TAPPING AND RIMING NUTS" communicated to me from
abroad by Johann Berg of the Royal Industrial School, Nurnberg, Germany,
Foreman 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 improved combined taps and rimers designed for tapping
and riming various size of holes by aid of one instrument.
These improvements refer to taps which produce the screw threads in cuts from one
end to the other of same and in one cut.
These improvements consist in the application of one or several taps at various
distances having obtuse cones with their conical part very prominent, or of a form
similar to such cones at the lower end of the cylindrical part of the taps and rimers,
and in the simultaneous application of one, the lower cone preceding or cylindrical
guide part thereof or stud for facilitating the commencement of the tapping process.
The cone and also the succeeding cylindrical parts are provided with an
undeveloped thread. When the tap has several succeeding short cones, the guido
stud is not absolutely necessary although it is always useful. Tho short cone at the
working end of the tap must not exceed three threads, this cone is of great importance
with regard to ordinary taps in the form of a slender cone, the width of the cut being
greatly diminished but the thickness of same increased.
By this change in the sectional dimensions of the cut, a saving of labour in tapping
a nut is effected, and the production is consequently increased, because such a tap
being very short a nut is by means of only a few turns readily tapped.
The further result of the application of a short cone at the working end of the tap is-
that by tapping nuts of different thickness or high width it prevents the increase of
the width of the cut as soon as the cone has entered as far as its greatest diameter.
These taps with only one short cone are used for tapping nuts of soft metal, such as
brass, cast iron, soft wrought iron, and so on.
For tapping nuts made of hard metal such as ordinary wrought iron, steel, taps
with two or more short cones placed at various distances from each other are applied.
By applying several cones with following cylindrical fillet-parts any changes in the
thickness and width of the cut can be made so that a corresponding distribution of
the cut in accordance with the strength of the metal of which the nuts are made is
produced by means of utilizing the differences in the diameters of the cylindrical
fillet-parts and the slight differences in the more or less conical formation of
the cones.
Likewise with such a tap and for purpose of a better distribution of the cut at the
point or incompletely tapped end, a second thread of any section can be cut.

page_text: By the use of the rimers also which at their lower part are formed like the taps, an
undeveloped thread is cut first in the hole which has to be rimed out, this undeveloped
thread is removed again by the further advance of the rimer. The process of cutting
this thread is exactly the same as by the application of the tap.
The use of these rimers also produces a diminution in the width of the cut and an increase
in the thickness of same; at the same time a more favorable formation in the sectional
dimensions of the cut is obtained with the result of very considerable less labour than
by the use of other rimers. Moreover the rimer is forced at each turn to advance
the distance of a thread so that the troublesome pressing in of the rimer is obviated.
The riming of the hole is accomplished in one cut by means of a continuous turning
of the rimer in one direction any difference in the depth of the hole the same as by
the process of tapping does not increase the size of the cut.
The application in succession of several fillet parts and rimers takes place when the
hole is very short and when it has to be greatly enlarged.
Such being the nature and object of my said Invention, the following is a complete
description of same, reference being had to the accompanying drawings forming a
part of this Specification in which
Figs. 1. and 1ª are elevation and sectional plan of fap suitable for soft metal.
Figs. 2, 2ª, 3, 3, 4, 4ª 5, 5ª 6, 6ª 7, 7" 8, 8ª 10, 10ª 11, 11, 12, 12ª are elevation
and sectional plans of taps having two or more short cones and designed for tapping
hard metals.
Figs. 9, 10, 11 and 12 being also rimers.
The application of one or several taps at various distances having obtuse cones with
their conical part very prominent or of a form similar to such cones at the lower end
of the cylindrical part of the taps and rimers, and in the simultaneous application of
one, the lower cone preceding a cylindrical guide part thereof or stud for facilitating
the commencement of the tapping process.
The cones and also the succeeding cylindrical parts are provided with an undeveloped
thread.
When the tap has several succeeding short cones the guide stud is not absolutely
necessary, Fig. 2 and 12 altho it is always useful.
The short cone at the working end of the tap must not exceed three threads this
cone is of great importance with regard to ordinary taps in the form of a slender
cone, the width of the cut being greatly diminished, but the thickness of same
increased.
By this change in the sectional dimensions of the cut a saving of labour in tapping
a nut is effected and the production is consequently increased, because such a tap
being very short, a nut is by means of only a few turns roady tapped.
The further result of the application of a short cone at the working end of the tap
is, that by tapping nuts of different thickness or hight it prevents the increase of the
width of the cut as soon as the cone has entered as far as its greatest diameter.
These taps with only one short cone (see Fig. 1.) are used for tapping nuts of soft
metal, such as brass, cast iron, soft wrought iron, and so on.
For tapping nuts made of hard metal such as ordinary wrought iron, steel, and so
on, taps with two or more short cones placed at various distances from each other are
applied b, 1, 263. 2, 3, 4, 5, 67, 8, 10, 11, 12.
By applying several cones with following cylindrical fillet parts a, a', any change
in the thickness and width of the cut can be made so that a corresponding distribution
of the cut in accordance with the strength of the metal of which the nuts are made is
produced by means of utilizing the differences in the diameters of the cylindrical fillet
parts and the slight differences in the more or less conical formation of the cones.
Likewise with such a tap and for the purpose of a better distribution of the cut at
the point or incompletely tapped end, a second thread of any section can be cut
Figs. 6 and 7.
By the use of the rimers, see Figs. 9, 10 11-12 which at their lower part are
formed like the taps an undeveloped thread is cut first in the hole which has to be
rimed out, this undeveloped thread is removed again by the further advance of the

page_text: rimer. The process of cutting this thread is exactly the same as by the application of
the tap.
The use of these rimers also produces a diminution in the width of the cut, and an
increase in the thickness of same, at the same timo a more favorable formation in the
sectional dimensions of the cut is obtained with the result of very considerable loss
labour than by the use of other rimers.
Moreover the rimer is forced at each turn to advance the distance of a thread so
that the troublesome pressing in of the rimer is obviated. The riming of the hole is
accomplished in one cut by means of a continuous turning of the rimer in one
direction. Any difference in the depth of the hole the same as by the process of
tapping does not increase the size of the cut.
The application in succession of the several fillet parts and rimers in Fig. 12. takes
place when the hole is very short, and when it has to be greatly enlarged.
Having thus fully described and ascertained the nature of my said Invention, and
in what manner the same is to be performed I declare that what I claim is
Firstly. The combination in a tap of guide stud d cone or cones, and thread or
threads as described, and substantially as illustrated by the annexed drawings.
Secondly. The construction of taps wherein is combined the conical parts and
cylindrical threaded parts as illustrated by the annexed drawings.
Thirdly. The combined taps and rimers as illustrated by Figs. 9, 10, 11. and 12.