Cigarettes case made by Frantisek Bibus, Mährisch Trübau / Moravská Trebová, CZ
Hello JoyousParkin
For curiosity I advise you to use a
magnet in the
area of hinge from your cigarettes case. Maybe you would be astonished?
Your cigarettes case made from non precious = magnetic material? Who could this?
In your case the
non precious material, but nearly invisible part for controls, is the
torsion bar spring in hinges tube, holding the cigarettes case two main flaps.
For to could
handle a cigarettes case,
by only one hand to be “free”, and for to could offer to others in a gesture of elegancy a cigarette, it was necessary to build in a spring mechanism, who opens already by “
one touch” only.
The main advantages of a
torsion bar spring is their durability; and their slim profile in the dimension of the hinge. She needs less of the item's interior or exterior volume, in comparisions to other springs systems, like e.g. coil springs. A torsion bar spring is like as a “normal” bar, who fits the two parts of a hinges area together to a functional hinge.
One end of the torsion bar spring is fixed on one end of the, let me say lower end of left hand flap; the other end is fixed on the upper end of the right hand flap.
In “
open” position, the torsion bar spring is in a “
relaxed” or “
0” position — when be closed, the torsion bar spring ends have moved their ends position to each other; and be laying in wait,
like a watching dog, on the opportunity to could serve again, to open again the flaps wide, and “bark” friendly: »
Please take as you like! «
Until yet I don’t know the primary inventor of the torsion spring principle — in the first halve of 20 century has start the application of that principle in the automotive industry. Look here:
http://www.autozine.org/technical_schoo ... tm#Torsion" onclick="window.open(this.href);return false;
http://en.wikipedia.org/wiki/Suspension_(vehicle" onclick="window.open(this.href);return false;)
http://en.wikipedia.org/wiki/Torsion_bar" onclick="window.open(this.href);return false;
Many claims were made, to be the inventor — maybe all were smokers? But in the Patent Registry Offices were smokers as well.
Kind regards silverport