1. A chain lateral travel limiter for a bicycle having a frame and a chain drive assembly connected to the frame, the chain lateral travel limiter comprising a body including a head, the head adapted for attachment to the frame, the body including a chain return finger attached to and extending from the head, the chain return finger including an arcuate face.
2. The chain lateral travel limiter of claim 1 further comprising a neck connected at first end to the head and at a second end to the chain return finger.
3. The chain lateral travel limiter of claim 1 wherein the arcuate face further comprises a continuously curving face.
4. The chain lateral travel limiter of claim 1 wherein the chain return finger further comprises a tapered leading edge.
5. The chain lateral travel limiter of claim 1 wherein the head further comprises a mounting aperture adapted for receiving a mounting screw for attachment to the frame.
6. The chain lateral travel limiter of claim 1 wherein the head further comprises an elongated mounting aperture, the elongated mounting aperture having a primary axis lying oblique to an axis of the body, the elongated mounting aperture adapted for receiving a mounting screw for attachment to the frame.
7. The chain lateral travel limiter of claim 1 further comprising a tube clamp connected to the head, the tube clamp adapted for attachment to the frame.
8. A chain lateral travel limiter for a bicycle having a frame and a chain drive assembly connected to the frame, the chain lateral travel limiter comprising:
a body including a head, the head adapted for attachment to the frame;
a neck connected at a first end to the head;
a chain return finger the body attached to and depending from the neck, the chain return finger including an arcuate face.
9. The chain lateral travel limiter of claim 8 wherein the arcuate face further comprises a continuously curving face.
10. The chain lateral travel limiter of claim 8 wherein the chain return finger further comprises a tapered leading edge.
11. The chain lateral travel limiter of claim 8 wherein the head further comprises a mounting aperture adapted for receiving a mounting screw for attachment to the frame.
12. The chain lateral travel limiter of claim 8 wherein the head further comprises an elongated mounting aperture, the elongated mounting aperture having a primary axis lying oblique to an axis of the body, the elongated mounting aperture adapted for receiving a mounting screw for attachment to the frame.
13. The chain lateral travel limiter of claim 8 further comprising a tube clamp connected to the head, the tube clamp adapted for attachment to the frame.
14. A chain drive assembly for a bicycle for a bicycle having a frame, the chain drive assembly comprising:
a rear sprocket mounted to the frame;
at least two front chain rings mounted to the frame;
a chain mounted for rotational movement with the rear sprocket and at least one of the at least two front chain rings;
a front d\xe9railleur assembly mounted to the frame the front d\xe9railleur adapted to selectively shift the chain laterally from an outer chain ring of the at least two front chain rings to an inner chain ring of the at least two front chain rings;
a chain lateral travel limiter including a body having a head, the head adapted for attachment to the frame, the body including a chain return finger attached to and extending from the head, the chain return finger including an arcuate face, the chain lateral travel limiter positioned proximate to the inner chain ring of the at least two front chain rings, so that during a shifting event wherein the front derailleur assembly operates to shift the chain laterally from the outer of the at least two front chain rings to the inner of the at least two front chain rings, and in the event that the front derailleur shifts the chain laterally from a first plane defined by the outer chain ring to second plane defined by the inner chain ring and the chain travels laterally beyond the second plane defined by the inner chain ring, the chain is caught against the chain lateral travel limiter and guided in a manner that redirects the chain to the second plane defined by the inner chain ring to engage the inner chain ring.
15. The chain lateral travel limiter of claim 14 further comprising a neck connected at first end to the head and at a second end to the chain return finger.
16. The chain lateral travel limiter of claim 14 wherein an outer chain ring of the at least two front chain rings includes a diameter and an inner chain ring of the at least two front chain rings includes a diameter smaller than the diameter of the outer chain ring.
17. The chain lateral travel limiter of claim 14 wherein the chain return finger further comprises a tapered leading edge.
18. The chain lateral travel limiter of claim 14 wherein the head further comprises a mounting aperture adapted for receiving a mounting screw for attachment to the frame.
19. The chain lateral travel limiter of claim 14 wherein the head further comprises a elongated mounting aperture, the elongated mounting aperture having a primary axis lying oblique to an axis of the body, the elongated mounting aperture adapted for receiving a mounting screw for attachment to the frame.
20. The chain lateral travel limiter of claim 14 further comprising a tube clamp connected to the head, the tube clamp adapted for attachment to the frame.
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 smart meter evaluation device that receives a signal according to a predetermined communication protocol in a wireless ad-hoc network including a plurality of smart meters that measure the amount of consumption and acquire meter value data, and evaluates a communication state of the plurality of smart meters, comprising:
a receiving unit for receiving a radio-frequency signal and converting the radio-frequency signal into a baseband signal;
a demodulating unit for converting the baseband signal into digital data and outputting the digital data as demodulated data;
a signal type specifying unit for specifying the signal type of the demodulated data on the basis of header information included in the demodulated data;
a communication information acquiring unit for acquiring communication information which is included in the demodulated data and includes at least the meter value data;
a signal waveform acquiring unit for acquiring the waveform of the baseband signal;
a display unit for displaying the signal type, the communication information, and the signal waveform;
a determining unit for detecting whether the signals from the plurality of smart meters collide with each other in one smart meter on the basis of a signal level of the baseband signal.
2. The smart meter evaluation device according to claim 1, further comprising:
a smart meter management unit for specifying the smart meter, which is a transmission source of the demodulated data; and
a signal level measuring unit for measuring the signal level of the baseband signal,
wherein the smart meter management unit specifies the smart meter, which is the transmission source of the demodulated data, on the basis of the signal level.
3. A smart meter evaluation method that receives a signal according to a predetermined communication protocol in a wireless ad-hoc network including a plurality of smart meters that measure the amount of consumption and acquire meter value data and evaluates a communication state of the plurality of smart meters, comprising:
a receiving step of receiving a radio-frequency signal and converting the radio-frequency signal into a baseband signal;
a demodulating step of converting the baseband signal into digital data and outputting the digital data as demodulated data;
a signal type specifying step of specifying the signal type of the demodulated data on the basis of header information included in the demodulated data;
a communication information acquiring step of acquiring communication information which is included in the demodulated data and includes at least the meter value data;
a signal waveform acquiring step of acquiring the waveform of the baseband signal; and
a display step of displaying the signal type, the communication information, and the signal waveform;
a signal collision detecting step of detecting whether the signals from the plurality of smart meters collide with each other in one smart meter on the basis of a signal level of the baseband signal.
4. The smart meter evaluation method according to claim 3, further comprising:
a smart meter specifying step of specifying the smart meter, which is a transmission source of the demodulated data; and
a signal level measuring step of measuring the signal level of the baseband signal,
wherein the smart meter specifying step specifies the smart meter, which is the transmission source of the demodulated data, on the basis of the signal level.