Improvements in or relating to Pivoted Rules or Measures.
Year: 1892

page_text: Date of Application, 20th Sept., 1892-Accepted, 22nd Oct., 1892
COMPLETE SPECIFICATION.
Improvements in or relating to Pivoted Rules or Measures.
I, HERMANN LEISTNER of the firm of Gebrüder Leistner, 83 Südstrasse, Leipzig
in the Empire of Germany, Rule Manufacturer, 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 that class of measuring rules in which two or more
members are pivoted one on the end of another back pair by a pin passing through
the members the ends of which are laid one above the other. The object of the
present invention is to improve the method of, or means for so pivoting the members
that on the one hand they may be more securely supported and connected, and on
the other hand the scale marks may not be interrupted but may allow the measure-
ment to be as easily read at or near the ends of the members as it is towards the
middle of each member.
In the annexed drawing
Fig. 1 is a plan of part of two members connected according to this invention and
shown extended in position for measuring.
Fig. 2 is a central longitudinal section thereof.
Fig. 3 shows the connecting piece alone in the position it would occupy if the
two members were at right angles the one to the other.
Fig. 4 is a section on line CD.
Fig. 5 is a view on a larger scale of another construction of connecting piece in a
similar position and
Fig. 6 is a section thereof on line A B.
In place of passing the pivotal pin direct through the members, a pair of plates a b.
is used, these plates being connected together by a rivet c so as to move circularly
the one on the other. These plates have turned up edges along their longitudinal
sides and on their faces punched up spikes or inserted pins adapted to enter the
material of the member and, with the said upturned edges, hold it securely on the
plate. The members, secured in this manner and with due regard to the spacing of
the scale divisions for the accuracy of the measure when extended, cover the rivet.
which cannot therefore fall out. The plates give strength to the rule and are
rounded at the ends to guard the ends of the members which being usually of wood
easily split in the ordinary measures of this kind.
Since the plates do not cover the surface of the members nor does any part of the
connector project above or through to the face of member, the scale divisions.
which were previously provided on the members are all equally visible and legible.
Figs. 5 and 6 show a further improvement in that the one plate is punched up
with an elongated raised portion and the other plate is provided with a similar and
equivalent depressed portion. The rivet is longer and under its head lies a spring
which draws the plates together. When the measure is either fully closed or
extended as regards each pair of members the raised part on the one plate lies
within the depressed pari of the other plate and affords a certain resistance against
altering the position of the members, sufficient that is to say to retain the measure
closed or open until it is desired to be opened or closed respectively.
Having now particularly described and ascertained the nature of this said inven-
tion and in what manner the same is to be perforined I declare that what I
claim is ;-
The hereindescribed method of connecting the members of a pivoted measure or
rule by plates, consisting in arranging the plates under the respective members

page_text: connected thereon so that the scale marks on the face of each member are fully
visible throughout.
2. In the aforesaid method of connecting the members, plates having respectively
raised and depressed portions in combination with a spring and elongated rivet
substantially as and for the purpose described.
Dated this 20th day of September 1892.
HERBERT & Co.,
18, Buckingham Street, Strand, London, W.C., Agents to Applicant.