1. A power cord protecting fitting applied to a power cord that has a connecting member connected to an electrical appliance at one end thereof, and an insertion plug to be plugged in a wall outlet at another end thereof,
the power cord protecting fitting, while being fixed to the electrical appliance and disposed between the connecting member and the insertion plug of the power cord, comprising a force lightening unit that lightens a force transferred to the connecting member when a force is applied to the power cord between a position where the power cord protecting fitting is disposed and the insertion plug in a direction that moves away from the connecting member.
2. The power cord protecting fitting according to claim 1, wherein the force lightening unit comprises a sandwiching member that can sandwich the power cord.
3. The power cord protecting fitting according to claim 2, further comprising a sandwiching-off preventing member that prevents the power cord sandwiched by the sandwiching member from being freed from being sandwiched.
4. The power cord protecting fitting according to claim 1, wherein the force lightening unit comprises a cord winding member that can wind the power cord.
5. The power cord protecting fitting according to claim 4, further comprising a disengagement preventing member that prevents the power cord wound around the cord winding member from being disengaged from the cord winding member.
6. The power cord protecting fitting according to claim 1, wherein the power cord protecting fitting is integrated with a housing of the electrical appliance.
7. A power cord protecting fitting applied to a power cord that has a connecting member connected to an electrical appliance at one end thereof, and an insertion plug plugged in a wall outlet at another end thereof, the power cord protecting fitting comprising:
a fixing part fixed to the electrical appliance; and
a projection part projected beyond the connecting member connected to the electrical appliance in a direction opposite to the connecting direction of the connecting member.
8. The power cord protecting fitting according to claim 7,
wherein the electrical appliance has a caster and is movable.
9. The power cord protecting fitting according to claim 7,
wherein the power cord protecting fitting is disposed between the connecting member and the insertion plug of the power cord, and comprises a force lightening unit that lightens a force transferred to the connecting member when a force is applied to the power cord between a position where the power cord protecting fitting is disposed and the insertion plug in a direction that moves away from the connecting member.
10. The power cord protecting fitting according to claim 9, wherein the force lightening unit comprises a sandwiching member that can sandwich the power cord.
11. The power cord protecting fitting according to claim 10, further comprising a sandwiching-off preventing member that prevents the power cord sandwiched by the sandwiching member from being freed from being sandwiched.
12. The power cord protecting fitting according to claim 9, wherein the force lightening unit comprises a cord winding member that can wind the power cord.
13. The power cord protecting fitting according to claim 12, further comprising a disengagement preventing member that prevents the power cord wound around the cord winding member from being disengaged from the cord winding member.
14. The power cord protecting fitting according to claim 7, wherein the power cord protecting fitting is integrated with a housing of the electrical appliance.
15. An electrical appliance comprising:
a power cord protecting fitting applied to a power cord that has a connecting member connected to the electrical appliance at one end thereof, and an insertion plug to be plugged in a wall outlet at another end thereof,
wherein the power cord protecting fitting, while being fixed to the electrical appliance and disposed between the connecting member and the insertion plug of the power cord, comprises a force lightening unit that lightens a force transferred to the connecting member when a force is applied to the power cord between a position where the power cord protecting fitting is disposed and the insertion plug in a direction that moves away from the connecting member.
16. An electrical appliance comprising a power cord protecting fitting comprising a fixing part fixed to the electrical appliance and a projection part projected beyond the connecting member connected to the electrical appliance in a direction opposite to the connecting direction of the connecting member.
17. The electrical appliance according to claim 16, wherein the electrical appliance is movable.
18. The electrical appliance according to claim 15, wherein a distance between a connection part to which the power cord is connected, and the power cord protecting fitting is 200 mm or less.
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. A system comprising:
(a) a switch including:
(i) a first state for allowing passage of a signal therethrough; and
(ii) a second state for preventing passage of the signal therethrough; and
(b) a detection circuit in communication with the switch, the detection circuit configured to:
(i) detect whether the signal includes an amplitude of at least a predetermined level;
(ii) operate the switch to the first state if the amplitude of the signal is at least the predetermined level; and
(iii) operate the switch to the second state if the amplitude of the signal is less than the predetermined level, wherein operation of the switch to the second state is delayed by a predetermined period of time,
wherein the system is a noise reduction system positionable between a cable television services provider and a cable television services recipient,
wherein the switch is configured to attenuate noise transmitted from the cable television services recipient to the cable television services provider,
wherein the detection circuit is in communication with the switch to selectively operate the switch between the first and second states,
wherein said detect includes demodulate and amplify a return signal from the cable television services recipient to the cable television services provider,
wherein the predetermined period is a second predetermined period and said detect includes transmit the demodulated and amplified return signal into a timer circuit to delay operation of the switch to the second state by the second predetermined period or to delay operation of the switch to the first state by a first predetermined period,
wherein the first predetermined period is shorter than the second predetermined period.
2. The system of claim 1, wherein the detection circuit comprises a radio frequency detector for detecting the amplitude of the signal.
3. The system of claim 2, wherein the detection circuit further comprises an amplifier in communication with the radio frequency detector, the amplifier for amplifying the signal.
4. The system of claim 1, wherein the second predetermined period of time is selected to avoid a loss of data due to a premature operation of the switch to the second state.
5. The system of claim 1, wherein the switch includes one or more of:
a radio frequency gate;
a radio frequency switch;
a voltage-controlled variable attenuator; and
combinations thereof.
6. The system of claim 1, wherein the signal is a return signal, the system further comprising:
(a) a first interface for receiving a forward signal and providing the return signal; and
(b) a second interface for providing the forward signal and receiving the return signal.
7. The system of claim 6, further comprising a first diplex filter coupled to the first interface, the first diplex filter including:
(a) a forward signal port; and
(b) a return signal port in communication with the switch.
8. The system of claim 7, further comprising a second diplex filter coupled to the second interface, the second diplex filter including:
(a) a forward signal port; and
(b) a return signal port in communication with the switch.
9. The system of claim 8, further comprising a forward signal amplifier coupled to the forward signal port of the first diplex filter and the forward signal port of the second diplex filter.
10. The system of claim 8, further comprising a return signal amplifier coupled to the return signal port of the first diplex filter and the switch.
11. The system of claim 8, further comprising:
(a) a plurality of second interfaces;
(b) a radio frequency splitter coupled to the second diplex filter, the radio frequency splitter including a port coupled to a respective one of each of the plurality of second interfaces.
12. The system of claim 11, further comprising:
(a) a second radio frequency splitter coupled to the first interface, the second radio frequency splitter including:
(i) a first port coupled to the first diplex filter; and
(ii) a second port coupled to one or more of the second interfaces.