Roller shutters

A shutter assembly having a portable power supply assembly, the shutter assembly including an electric motor, an electrical power receiving port electrically connected to the electric motor, and a flexible shutter able to open and close by being wound onto and off a rotating shaft, the portable power supply assembly including:

• (a) a portable supply of power;
• (b) a detachable body capable of electrically connecting the portable supply of power to the receiving port;
• and
• (c) a means for switching on and off the portable supply of power to operate the shutter assembly when the detachable body is connected to the receiving port.

A series of shutter assemblies and a single portable power supply assembly, each shutter assembly including an electric motor, an electrical power receiving port electrically connected to the electric motor, and a flexible shutter able to open and close by being wound onto and off a rotating shaft, the single portable power supply assembly including:

• (a) a portable supply of power;
• (b) a detachable body capable of electrically connecting the portable supply of power to any of the receiving ports;
• and
• (c) a means for switching on and off the portable supply of power to operate a shutter assembly when the detachable body is connected to the receiving port of that shutter assembly.

A torsion spring assembly capable of reducing load on the electric motor of a shutter assembly, the shutter assembly including a flexible shutter able to open and close by being wound onto and off a rotating shaft, wherein the torsion spring assembly includes:

• (a) a housing able to be mounted at or towards one end of the shaft;
• (b) a torsion spring mounted within the housing, one end of the torsion spring being held with respect to the housing;
• and
• (c) a shaft adapter rotatably mounted with respect to the housing, the other end of the torsion spring being held with respect to the shat adapter, the shaft adapter capable of being connected to the shaft so that the torsion spring is loaded as the shaft adapted is rotated by the shaft when the flexible shutter is wound off the shaft.

A shutter assembly having a torsion spring assembly, the shutter assembly including an electric motor and a flexible shutter able to open and close by being wound onto and off a rotating shaft, the torsion spring assembly including:

• (a) a housing able to be mounted at or towards one end of the shaft;
• (b) a torsion spring mounted within the housing, one end of the torsion spring being held with respect to the housing;
• and
• (c) a shaft adapter rotatably mounted with respect to the housing, the other end of the torsion spring being held with respect to the shaft adapter, the shaft adapter being connected to the shaft so that the torsion spring is loaded as the axle is rotated by the shaft when the flexible shutter is wound off the shaft.

A shutter assembly having a portable power supply assembly and a torsion spring assembly, the shutter assembly including an electric motor, an electric power receiving port electrically connected to the electric motor, and a flexible shutter able to open and close by being wound onto and off a rotating shaft, the portable power supply assembly being capable of providing electrical power to the electric motor, the portable power supply assembly including:

• (a) a portable supply of power;
• (b) a detachable body capable of electrically connecting the portable supply of power to the receiving port;
• and
• (c) a means for switching on and off the portable supply of power to operate the shutter assembly when the detachable body is connected to the receiving port;
• the torsion spring assembly being capable of reducing load on the electric motor, the torsion spring assembly including;
• (d) a housing able to be mounted at or towards one end of the shaft;
• (e) a torsion spring mounted with the housing, one end of the torsion spring being held with respect to the housing;
• and
• (f) a shaft adapter rotatably mounted with respect to the housing, the other end of the torsion spring being held with respect to the shaft adapter, the shaft adapter capable of being connected to the shaft so that the torsion spring is loaded as the shaft adapter is rotated by the shaft when the flexible shutter is wound off the shaft.