Improvements in Washers or Washering Material for making Joints.
Year: 1898

page_text: Date of Application, 28th Feb., 1898-Accepted, 2nd Apr., 1898
COMPLETE SPECIFICATION.
Improvements in Washers or Washering Material for making Joints.
I, FRIEDRICH CARL KULLAK, of 79, Gruner Weg, Berlin, in the Empire of
Germany, Merchant, 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 :-
In joints which are formed by means of inserted discs, rings and the like of solid
indiarubber, caoutchouc, mixtures of graphite and rubber or other similar yielding or
flexible substances, the drawback exists that the same have insufficient durability.
They are also forced out of the joints or flattened and so forth.
This invention has for its object a washering material in which sufficient resistance
is given to the mass by means of a metallic insertion provided with zigzags, teeth
or the like, the jointing or washering capability of the mass being increased.
The invention is shown in the accompanying drawings in which as may be seen the
washering material is formed of a metallic insertion a and a washering coating b and c
on each side of the same. The metallic insertion is shown in Figure 1 corrugated in
Figure 2 straight. In both cases the insertions are provided with perforations whereby
(in a similar manner to friction plates or graters) projections, points, or teeth a' are
formed. These serve for holding the washering covering or coating b and c and for
combining the same into a whole.
The connection or combination of the parts a, b and c takes place as a rule by the
plates b and c being simply pressed against the insertion a. The points or the like
penetrate the mass and hold it fast. The manufacture may also take place in such a
way that as shown in Figure 3 the mass d is cast in a liquid condition round the
insertions a or the plates a may be coated with the washering substance whilst in a
pasty condition. The points may also be arranged in various ways; their form or
position does not form an essential part of the invention. In certain cases it may be
desirable that the metallic disc or insertion shall only carry washering substance on
one side, in which case of course the teeth or points will only be made to project on
one side of the insertion. The corrugated form (Figure 1) or like forms of construc-
tion have the advantage of affording a certain elasticity between the substances to be
washered, thus assisting the object. sought for, as the substance b and c pressed into
the corrugations or recesses is prevented from being forced sideways out of the
joints.
If the teeth or joints are made by perforating the plate a, a further advantage is
afforded in that the substance also penetrates through the holes and thus a thorough
connection of the parts a, b, c as a whole is further ensured.
The washering material hereinbefore described may be made in the most varied forms,
as shown for instance in Figures 4 and 5 and 6 and 7, which show respectively a
flanged or pipe joint and a rectangular piston joint or washer. Discs, slide joints and
the like may also be made by this method.
Having now particularly 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:-
Washers or washering material having an intermediate piece or insertion of sheet

page_text: metal provided with points or teeth to hold discs, strips or masses of a yielding
washering substance, said teeth penetrating into the washering substance for the
purpose of enabling a tight joint to be made, substantially as herein before set
forth.
Datod thin wrth dem
1000