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1. WO1985001681 - PROCESS FOR MANUFACTURING A SPIRAL-SHAPED DRIVING SPRING

Publication Number WO/1985/001681
Publication Date 25.04.1985
International Application No. PCT/CH1984/000165
International Filing Date 05.10.1984
IPC
B21F 3/08 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
FWORKING OR PROCESSING OF METAL WIRE
3Coiling wire into particular forms
08to flat spiral
F03G 1/02 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
GSPRING, WEIGHT, INERTIA, OR LIKE MOTORS; MECHANICAL-POWER-PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
1Spring motors
02characterised by shape or material of spring, e.g. helical, spiral, coil
F16F 1/10 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
FSPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
1Springs
02made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
04Wound springs
10Spiral springs with turns lying substantially in plane surfaces
CPC
B21F 3/08
BPERFORMING OPERATIONS; TRANSPORTING
21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
FWORKING OR PROCESSING OF METAL WIRE
3Coiling wire into particular forms
08to flat spiral
F03G 1/02
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
GSPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
1Spring-motor
02characterised by shape or material of spring, e.g. helical, spiral, coil
F16F 1/10
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
FSPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
1Springs
02made of steel or other material having low internal friction
04Wound springs
10Spiral springs with turns lying substantially in plane surfaces
Applicants
  • BAUMANN & CIE AG [CH]/[CH] (AllExceptUS)
  • SIEBERS, Gunter [DE]/[CH] (UsOnly)
Inventors
  • SIEBERS, Gunter
Agents
  • SCHEIDEGGER, ZWICKY & CO.
Priority Data
5607/83-114.10.1983CH
Publication Language German (DE)
Filing Language German (DE)
Designated States
Title
(EN) PROCESS FOR MANUFACTURING A SPIRAL-SHAPED DRIVING SPRING
(FR) PROCEDE DE FABRICATION D'UN RESSORT-MOTEUR SPIRALE
Abstract
(EN)
From a spring band (6), a first winding (18) is formed which is comprised of turns which are arranged flat on top of each other. A straight terminal portion (6A) not yet wound of the spring band is folded in the direction opposite to the flexure direction of the winding turns (18), in an arc of a circle to form a terminal arc (6B) directly connected by a continuous and progressive junction to the outer turn of the winding (18). The curvature radius of the terminal arc (6B) coincides with the radius of a winding mandrel (19) on which is wound the spring band (6) after having been subjected to a heat treatment, and in the direction opposite to the flexure direction of the turns of the first winding (18). The thus formed second winding (20) is provided to be inserted as a driving spring into a spring casing, the end (7) of the spring band (6) situated outside on the second winding (20) being connected to the circumferential wall of the spring casing and the terminal arc (6B) now arranged inside being connected to a core rotating in the spring casing and of which the radius coincides also with the curvature radius of the terminal arc (6B). The spring core may be coupled to a winder drum, for example for a safety belt. The driving spring thus obtained is differentiated by a proportionally high initial torsion moment, as soon as a small member of revolutions of the spring core is reached.
(FR)
A partir d'un ruban de ressort (6), on forme un premier enroulement (18) composé de spires disposées à plat les unes sur les autres. Une partie terminale droite (6A) non encore enroulée du ruban de ressort est pliée, dans le sens opposé au sens de flexion des spires de l'enroulement (18), en arc de cercle pour former un arc terminal (6B) se raccordant directement et par une jonction continue et progressive à la spire extérieure de l'enroulement (18). Le rayon de courbure de l'arc terminal (6B) coïncide avec le rayon d'un mandrin de bobinage (19) sur lequel est enroulé le ruban de ressort (6) après un traitement thermique, et ce dans le sens opposé au sens de flexion des spires du premier enroulement (18). Le second enroulement ainsi formé (20) est conçu pour être introduit comme ressort-moteur dans un boîtier de ressort, l'extrémité (7) du ruban de ressort (6) située à l'extérieur sur le second enroulement (20) étant reliée à la paroi circonférentielle du boîtier de ressort et l'arc terminal (6B) disposé maintenant à l'intérieur étant relié à un noyau tournant dans le boîtier de ressort et dont le rayon coïncide également avec le rayon de courbure de l'arc terminal (6B). Le noyau de ressort peut être couplé à un tambour enrouleur, par exemple pour une ceinture de sécurité. Le ressort-moteur ainsi obtenu se distingue par un moment initial de torsion proportionnellement élevé, déjà dans le cas d'un petit nombre de révolutions du noyau de ressort.
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