1. A system for transferring electric power and signals via a power line by time-division multiplexing, comprising:
a power line comprising a first transmission line and a second transmission line, wherein the first transmission line is connected in series with a first switch and is thus divided into a source end and a loading end;
at least two electronic-circuit units, each connected in series between the loading end and the second transmission line; and
at least a controller electrically connected with and configured for synchronously controlling the first switch and the electronic-circuit units, wherein when the first switch is closed, electric power is transferred from an electric power source to the loading end, and when the first switch is opened, the electronic-circuit units transfer signals through the loading end.
2. The system of claim 1, wherein the power line is a direct-current (DC) power line or an alternating-current (AC) power line.
3. The system of claim 1, wherein a said electronic-circuit unit is defined as a major electronic-circuit unit, and the major electronic-circuit unit has a power input end electrically connected with the source end.
4. The system of claim 1, wherein the at least a controller is provided in the electronic-circuit units in a one-to-one manner.
5. The system of claim 1, wherein at least one of the electronic-circuit units is connected in parallel with a second switch and an energy storage element, and the at least one second switch and the at least one energy storage element are sequentially connected in series between the loading end and the second transmission line, the at least a controller being electrically connected with and configured for synchronously controlling the at least one second switch, wherein when the at least one second switch is closed, the electric power source transfers electric power to the loading end and charges the at least one energy storage element, and when the at least one second switch is opened, the at least one energy storage element provides electric power required for operation of the at least one of the electronic-circuit units.
6. The system of claim 5, wherein a rectifier circuit is connected in series between each said second switch and a corresponding said energy storage element when the power line is an AC power line.
7. The system of claim 6, wherein each said energy storage element is one of a rechargeable battery, a capacitor, a plurality of series-connected capacitors, and a plurality of parallel-connected capacitors.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1-11. (canceled)
12. A shake shoe, comprising:
a shoe having a sole with a horizontal bore passing through said sole;
a first half-axle inserted into a first side of the horizontal bore with said first half-axle having an inner end and an outer end and with a first wheel attached to said outer end of said first half-axle, said inner end of said first half-axle being located within the horizontal bore and having a first flattened portion with a first half and a second half thereof with said second half of said first flattened portion being closer to said first wheel;
a second half-axle inserted into a second side of the horizontal bore with said second half-axle having an inner end and an outer end and with a second wheel attached to said outer end of said second half-axle, said second side of the horizontal bore being a side at an opposite end of the horizontal bore relative to said first side of the horizontal bore, said inner end of said second half-axle being located within the horizontal bore and having a second flattened portion with a first half and a second half thereof with said second half of said second flattened portion being closer to said second wheel, said first flattened portion and said second flattened portion overlapping within the horizontal bore;
a first recess is located in said second half of said first flattened portion of said first half-axle;
a second recess is located in said second half of said second flattened portion of said second half-axle;
a first detent lug located on said first half of said first flattened portion of said first half-axle, said first detent lug being complementary with said second recess of said second half-axle;
a second detent lug located on said first half of said second flattened portion of said second half-axle, said second detent lug being complementary with first recess of said first half-axle;
a first pivot for pivoting said second detent lug of said second half-axle into said first recess of said first half-axle; and,
a second pivot for pivoting said first detent lug of said first half-axle into said second recess of said second half-axle.
13. The skate shoe according to claim 12, wherein said first recess and said second recess have a first wall and second wall, respectively, oriented transversely to a longitudinal axis of a respective said half-axle, is a blind hole from which a detent element projects that is pressable into the blind hole against a biasing force and, into a surface of said detent lug that is complementary to a respective said wall, is an indentation that is complementary to a respective said detent element.
14. The skate shoe according to claim 12, wherein said first half-axle includes a first axial flange and said second half-axle includes a second axial flange, said first said axial flange and said second axial flange are each located adjacent the horizontal bore with a diameter of each of said first axial flange and said second axial flange being greater than a diameter of the horizontal bore.
15. The skate shoe according to claim 12, further comprising at least one flat key surface in close proximity to said outer end of each of said first half-axle and said second half-axle with said at least one flat key surface being formed in each of said first half-axle and said second half-axle.
16. The skate shoe according to claim 15, further comprising a ring grove contiguous with a respective said at least one flat key surface for each of said first half-axle and said second half-axle, said ring grove for each said half-axle surrounds each of said first half-axle and said second half-axle.
17. The skate shoe according to claim 15, further comprising a ring grove contiguous with a respective said at least one flat key surface for each of said first half-axle and said second half-axle, said ring grove for each said half-axle, and a first retaining washer contiguous with said first wheel and a second retaining washer contiguous with said second wheel, each respective said ring groove being interrupted at, at least, one point by a stop that blocks a securing element that contacts with said stop when a respective said retaining washer is pivoted relative to a respective said half-axle.
18. The skate shoe according to claim 12, further comprising a first retaining washer contiguous with said first wheel and a second retaining washer contiguous with said second wheel, said first retaining washer and said second retaining washer are, respectively, mounted onto said outer end of each of said first half-axle and said second half-axle.
19. The skate shoe according to claim 12, wherein said first half-axle and said second half-axle are of an identical construction.
20. A method for mounting two half-axles in a horizontal bore of a skate shoe, said skate shoe comprising:
a shoe having a sole with a horizontal bore passing through said sole;
a first half-axle inserted into a first side of the horizontal bore with said first half-axle having an inner end and an outer end and with a first wheel attached to said outer end of said first half-axle, said inner end of said first half-axle being located within the horizontal bore and having a first flattened portion with a first half and a second half thereof with said second half of said first flattened portion being closer to said first wheel;
a second half-axle inserted into a second side of the horizontal bore with said second half-axle having an inner end and an outer end and with a second wheel attached to said outer end of said second half-axle, said second side of the horizontal bore being a side at an opposite end of the horizontal bore relative to said first side of the horizontal bore, said inner
end of said second half-axle being located within the horizontal bore and having a second flattened portion with a first half and a second half thereof with said second half of said second flattened portion being closer to said second wheel, said first flattened portion and said second flattened portion overlapping within the horizontal bore;
a first recess is located in said second half of said first flattened portion of said first half-axle;
a second recess is located in said second half of said second flattened portion of said second half-axle;
a first detent lug located on said first half of said first flattened portion of said first half-axle, said first detent lug being complementary with said second recess of said second half-axle;
a second detent lug located on said first half of said second flattened portion of said second half-axle, said second detent lug being complementary with first recess of said first half-axle;
a first pivot for pivoting said second detent lug of said second half-axle into said first recess of said first half-axle; and,
a second pivot for pivoting said first detent lug of said first half-axle into said second recess of said second half-axle, said method comprising the steps of:
partially inserting said first half-axle into the first side of the horizontal bore;
partially inserting said second half-axle into the second side of the horizontal bore until said inner end of said second half-axle contacts said inner end of said first half-axle;
securing said first half-axle against rotation about its longitudinal axis;
pivoting said second half-axle about its longitudinal axis until said first flattened portion and said second flattened portion lie opposite one another relative to the longitudinal axis of each said first half-axle and said second half-axle;
completely inserting both said first half-axle and said second half-axle into the horizontal bore along their respective said longitudinal axis until said inner end of each of said first half-axle and said second half-axle abut an end of said flattened portion of said second half-axle and said first half-axle, respectively, and so that each of said first detent lug and said second detent lugs opposite said second recess and said first recess, respectively;
securing said first half-axle against rotation about its longitudinal axis; and,
pivoting said second half-axle about its longitudinal axis to the extent that each of said first detent lug and said second detent lug engages, respectively, said second recess of said second half-axle and said first recess of said first half-axle.