Bobbin assembly with backlash preventing structure
OwnerRonald Kronenbergerinventor
Life of this patent
Estimating the term…
Abstract
The combination of a bobbin assembly and a support for the bobbin assembly. The bobbin assembly has a core around which a supply of thread can be wrapped and having a rotational axis, a first flange having first and second oppositely facing surfaces with the first surface bounding a storage space for thread wrapped around the core, and a magnetic element. The support has a third surface with a first metal material facing the second surface with the bobbin assembly operatively connected to the support and sufficiently close to the magnetic element so that a magnetic field is generated between the magnetic element and first metal material that tends to resists movement of the bobbin assembly relative to the support around the rotational axis of the core.
Claims20
In combination:
- a) a bobbin assembly comprising:
- i) a core around which a supply of thread can be wrapped, the core having a rotational axis;
- ii) a first flange having first and second oppositely facing surfaces, the first surface bounding a storage space for thread wrapped around the core;
- and
- iii) a magnetic element;
- b) a support for the bobbin assembly, said support comprising:
- i) a third surface comprising a first metal material facing the second surface with the bobbin assembly operatively connected to the support and sufficiently close to the magnetic element so that a magnetic field is generated between the magnetic element and first metal material so as to generate a force that resists movement of the bobbin assembly relative to the support around the rotational axis of the core to a degree that the force does not significantly impede free relative rotation between the bobbin assembly and support but resists rotation to reduce the likelihood of thread backlash;
- and
- c) a loop taker for drawing thread off of the bobbin assembly by causing rotation of the bobbin assembly.
In combination:
- a) a bobbin assembly comprising:
- i) a core around which a supply of thread can be wrapped, the core having a rotational axis;
- ii) a first flange having first and second oppositely facing surfaces, the first surface bounding a storage space for thread wrapped around the core,
- wherein the first flange comprises a first metal material;
- b) a support for the bobbin assembly, said support comprising:
- i) a third surface facing and adjacent the second surface with the bobbin assembly operatively connected to the support;
- and
- ii) a magnetic element that is one of at or adjacent to the third surface so that a magnetic field is generated between the magnetic element and first metal material so as to generate a force that resists movement of the bobbin assembly relative to the support around the rotational axis of the core to a degree that the force does not significantly impede free relative rotation between the bobbin assembly and support but resists rotation to reduce the likelihood of thread backlash;
- and
- c) a loop taker for drawing thread off of the bobbin assembly by causing rotation of the bobbin assembly.
In combination:
- a) a bobbin assembly comprising:
- i) a core around which a supply of thread can be wrapped, the core having a rotational axis;
- ii) a first flange having first and second oppositely facing surfaces, the first surface bounding a storage space for thread wrapped around the core;
- and
- iii) a first magnetic element;
- b) a support for the bobbin assembly, said support comprising:
- i) a third surface facing the second surface with the bobbin assembly operatively connected to the support;
- and
- ii) a second magnetic element that is one of at or adjacent to the third surface,
- the first and second magnetic elements interacting to produce a force that resists movement of the bobbin assembly relative to the support around the rotational axis of the core to a degree that the force does not significantly impede free relative rotation between the bobbin assembly and support but resists rotation to reduce the likelihood of thread backlash;
- and
- c) a loop taker for drawing thread off of the bobbin assembly by causing rotation of the bobbin assembly.
Dependencies are inferred from the claim text.