New or Improved Appliances for Diminishing or Doing Away with the Clicking Noise in Treadle Sewing Machines.
Year: 1887

page_text: Date of Application, 30th Mar., 1887.
Specification Accepted, 10th May, 1887.
New or Improved Appliances for Diminishing or Doing Away with
the Clicking Noise in Treadle Sewing Machines.
I, CARL KAHN of Oschatz in the Kingdom of Saxony and German Empire do
hereby declare the nature of this invention and in what manner the same is to be per-
formed to be particularly described and ascertained in and by the following statement:-
This Invention relates to improvements in treadle sewing machines and has for its
object diminishing or entirely doing away with the unpleasant clicking noise which is
produced in sewing with treadle sewing machines and for this purpose the following
appliances which I will proceed to describe with reference to the accompanying draw-
ings are fitted to the said machine.
Figure 1 is a longitudinal view of the new arrangement.
Figure 2 is a plan of same.
Figure 3 is a cross section on line A. B. Figures 1 and 2.
Figure 4 is an end view of the arrangement.
Figure 5 is a longitudinal section of same on the line C. D. Figure 2.
The wooden table plate bis cut out so far that the frame d (made of cast iron
wrought iron or other suitable material and serving at the same time as oil catcher with
which the sewing machine rest u, is connected by hinges see Figure 3 on which latter
the actual sewing machine rests) has plenty of play on all sides in the cut out part of
the table. The frame d is either entirely or only partially encased in a non-resonant
metal, or such metal is fitted only to those parts of the frame d where it comes into
contact with other metal parts. These points of contact are indicated in the figure
by d. A soft elastic layer e, such as felt, india rubber or other analogous material
may also be laid in between the non resonant metal and the cast iron (or other metal)
surface.
In order to avoid the transmissions of the noise through the frame e, to the wooden
plate b, to the sewing machine table, intermediate layers of lead and felt may be
arranged between the frame and the wooden plate b. The frame d is also separated
from the frame c by lead and felt strips. Thus by the arrangement of non resonant
and sound deadening elastic layers, the contact of two resonant metals is avoided and
obviated at every point of connection of the machine with the frame, so that the

page_text: transmission and increase of noise is prevented and the clicking noise deadened or
done away with.
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 :-
1. An intermediate layer of lead or other non resonant metal between the frame
which carries the machine itself, on the one hand, and the frame or the framework on
the other hand, so as to prevent the transmission of sound substantially as herein
before set forth.
2. The intermediate layer of non-resonant metal claimed in the first claim in con-
junction or combined with an elastic and soft layer substantially as and for the purposes
herein before set forth.
3. The arrangement of intermediate layers of non-resonant material and soft elastic
material between the frame and the wooden plate, so as to diminish the resonance of
the table plate substantially in the manner and for the purposes herein before set forth.
4. The herein before described method of deadening or doing away with the
clicking noise in treadle sewing machines substantially in the manner set forth and
represented in the drawings hereunto annexed.
Dated this 30th day of March 1887