Improvements in or connected with Cee or Bowed Springs..
Year: 1898

page_text: Date of Application, 21st Nov., 1898-Accepted, 8th Apr., 1899
COMPLETE SPECIFICATION.
Improvements in or connected with Cee or Bowed Springs..
I, CARL HECHTLE, of Hanau-on-the-Main, in the German Empire, Jewellery
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 a metallic spring working either by expansion or by
compression the middle part of which bent in the form of a bow is of uniform
thickness, and the ends of which are thickened and of dovetail or wedge shaped
form tapering towards the middle part. These ends are either bent outwards or
inwards, as the case may be, and engage either on their inner or outer sides with
lateral abutments by means of pins which when the device is pulled out or pushed
in the middle part or bow acting as a spring-engage adjustably in grooves on
the dovetail shaped ends.
In the accompanying drawings various modifications of the subject matter in
question, serving different purposes, are shewn. Figures 123 and 4 represent a
spring applied to a stud for cuffs, collars, or in place of shirt buttons, the spring
bow working by expansion. Figures 5 and 6 represent a spring stud working by
compression for purposes similar to those specified in respect of Figures 1 to 4.
Figures 7 and 8 shew a modification of the improved tension spring as applied
for fastening purses and the like. Figures 9 and 9*, shew a modification of the
spring specially suitable for clamping appliances or electric circuit closers and
the like. Figure 10 represents the same modification as shewn in Figures 7
and 8 but serving for locking the handle bars of cycles. Figures 11 to 14 shew
the device adapted to be used as a pressure spring in mattresses and the like, the
thickened ends being bent outward in Figures 11 and 12 and inwards in Figures 13
and 14. Figures 15 to 19 are other modifications of the spring to be used as
clamping devices for paper files and the like.
As shewn in the drawings the improved spring, whether acting by expansion
or compression, consists of a thin bow-shaped middle part a acting as a spring,
each of its ends b. being thickened like dovetails or wedges. These ends are
bent in an oblique direction either outwards or inwards according as the spring
works by expansion of compression, these thickened ends either pressing from
within outwards against lateral abutments c, as shewn in Figures 1 to 4, 7 to 12,
and 15 to 19, or they press and engage, as represented in Figures 5 and 6, or in
Figures 13 and 14, from without inwards against the surfaces of a central abut-
ment or support e, the abutments core being formed on, or carried by, a base
plate d. say the back plate of a stud, the clasp of a purse, or the like. "In both
cases the thickened ends are compulsorily guided by pins projecting from the
surfaces of the abutments and fitting into longitudinal grooves in the thickened
spring ends which being thus guided upon the surfaces of the abutments may be
slid over these surfaces and engage therewith either by the tendency to expansion
or compression of the spring ends, as the case may be.
With the modification shewn in Figures 1 to 4, after inserting the stud in
its button hole the elastic bow a is drawn outwards and may be pivotally folded

page_text: down into the position shewn in Figures 3 and 4 so as to retain it in the button
hole.
With the modification shewn in Figures 5 and 6 it is necessary to press the
spring loop a inwards in order that it may be folded into the position shewn in
Figure 6.
+
.
÷
With the modification shewn in Figures 7 and 8 the spring loop a, on the con-
trary, requires to be drawn outwards before it can be brought into the folded
position shewn in Figure S.
With the modification represented in Figures 9 and 94, it is necessary to exert
pressure in the direction of the arrow (Figure 9*,) upon the spring in order to
raise the spring ends b from the base plate d (upon which in their normal position
they press) this being effected by compressing the loop a and bringing it into
the position shewn by dotted lines in Figure 9. This modification of the spring
is adapted to serve as a clip or clamping device for cravats, papers, etc.
The modification Figure 10 indicates an example where the spring a works by
tension. Its thickened ends b are supposed to be inserted into a suitable recess f
of the stem of the front fork and the steering head tube of a cycle the spring being
in this case used for locking the handle bar. The position represented by full
lines shews the spring when fastening the front fork. After withdrawing the
spring into the position shewn in dotted lines it can be folded down and the front
fork of the cycle is then free to turn within the steering head tube.
In the modification shewn in Figures 11 to 14, a is supposed to serve as the
spring of a mattress or couch and the like, the thickened ends b pressing outwards
in the case shewn in Figures 11 and 12 and being inserted in a slot g. of the
base plate are engaged with the under surface of the plate d. Figure 11 shews
the spring in its normal position and Figure 12 in that which it takes when pressed
down. According to Figures 13 and 14 the thickened ends 6 of the spring are
given an inwardly oblique direction and press inwardly against a central pillar
or abutment e which extends from the plate d. Figure 13 shews the spring in
its normal position and Figure 14 in the position it assumes when pressed down.
With the modifications shewn in Figures 15 to 18 the wedge-like ends 6 of the
bow-shaped middle part a are longitudinally divided or forked and, as shewn in
the drawings, they are first bent asunder and then inwards or outwards, as the
case may be, so that the ends looped or bent inwards are either as shewn in side
view in Figure 15 and in top view in Figure 16-engaged directly in the looped
ends of the other parts or they are as shewn in side view in Figure 17 and in
top view in Figure 18-placed outside the looped ends of the other parts and
coupled therewith by a pin. The bow-like middle part a is brought into such
position opposite the couplings of the ends that two halves are formed which act
as springs one against the other. They are moved apart, around their point of
junction as a pivot, by the exertion of a pulling force and may serve as a clip or
clamping device for cravats, papers, or other articles, placed between them.
The modification shewn in Figure 19 corresponds with that in Figure 18 inas-
much as the ends 6 of the bow-like middle part a are bent towards each other
in the same manner and also make spring-like contact against staples inserted in
a supporting plate a board d or the like, the device being adapted for use as a
letter file or the like.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I claim
is:
:
1. The combination with a bowed spring-member having inclined surfaces, of
inclined planes with which said surfaces co-act, whereby the pressure of the spring
is transmitted along a direction different from the normal direction of pressure of
the spring and means for holding the spring member in operative relation to the
inclined planes. -

page_text: 2. The combination with a bowed spring member having ends provided with
inclined surfaces, of an inclined plane with which said surfaces co-act, and means
for holding the spring member in operative relation to the inclined planes and per-
mitting bodily movement of the spring member.
.3. The combination with a bowed spring member having inclined surfaces, of
inclined planes arranged to co-act with the inclined surfaces and pivotal means
for holding the spring member in operative relation to the inclined planes.
4. The combination with a bowed spring member having slots and inclined
surfaces, of inclined planes arranged to co-act with the inclined surfaces and of
pins passing through the slots and holding the spring member in operative relation
to the inclined planes, whereby longitudinal and angular motion of the spring
member are permitted.
Dated this 21st dovr of Narambon 1900
A. M. & WM. CLARK,
Chartered Patent Agents,
53, Chancery Lane, London.