摘要:
In one embodiment, a method for implementing two-way communication between at least first and second devices comprises steps of: (a1) during finite time periods following transmission of respective first messages from the first device to the second device, using the first device to listen for second messages transmitted from the second device to first device; and (a2) after each of the finite time periods following the transmission of the respective first messages from the first device to the second device, ceasing to use the first device to listen for second messages transmitted from the second device to the first device until after the first device transmits another first message to the second device. In another embodiment, a method for implementing two-way communication between at least first and second devices comprises steps of: (a1) during finite time periods following reception by the second device of respective first messages from the first device, using the second device to transmit second messages to the first device; and (a2) after each of the finite time periods following reception by the second device of respective first messages from the first device, ceasing to use the second device to transmit second messages to the first device until after the second device receives another first message from the first device.
摘要:
A diaphragm type flush valve for use with toilet devices such as urinals and water closets includes a body having an inlet and an outlet, a valve seat between the inlet and outlet, and a valve movable to a closing position on the valve seat to stop the flow between the inlet and outlet. The valve member includes a diaphragm peripherally attached to the body and a disc positioned on top of the diaphragm. There is a guide extending downwardly from the diaphragm. The disc is attached to the guide and functions to secure the diaphragm, disc and guide into the valve member. The disc includes a rigid body and a seal member, with the seal member having a portion on an upper surface of the disc for sealing contact with a relief valve, and a portion on a lower surface of the disc for contact with the diaphragm. The disc is attached to the guide through a one-way clutch which permits relative rotation of the disc and guide in one direction during assembly, and prevents relative rotation in the opposite direction after assembly.
摘要:
In one embodiment, a method for implementing two-way communication between at least first and second devices comprises steps of: (a1) during finite time periods following transmission of respective first messages from the first device to the second device, using the first device to listen for second messages transmitted from the second device to first device; and (a2) after each of the finite time periods following the transmission of the respective first messages from the first device to the second device, ceasing to use the first device to listen for second messages transmitted from the second device to the first device until after the first device transmits another first message to the second device. In another embodiment, a method for implementing two-way communication between at least first and second devices comprises steps of: (a1) during finite time periods following reception by the second device of respective first messages from the first device, using the second device to transmit second messages to the first device; and (a2) after each of the finite time periods following reception by the second device of respective first messages from the first device, ceasing to use the second device to transmit second messages to the first device until after the second device receives another first message from the first device.
摘要:
A cap assembly for closing an access opening in a plumbing fitting includes a cap for rotatable attachment to the plumbing fitting, with the cap having an interior surface which faces the plumbing fitting. There is an elastomeric friction ring positioned between the cap interior surface and the plumbing fitting, which friction ring has a plurality of circumferentially spaced projections facing and in contact with the plumbing fitting. The projections are formed and adapted to require less torque when the cap is rotatably attached to the plumbing fitting than when said cap is rotatably removed from the plumbing fitting.
摘要:
In one embodiment, a method for implementing two-way communication between at least first and second devices comprises steps of: (a1) during finite time periods following transmission of respective first messages from the first device to the second device, using the first device to listen for second messages transmitted from the second device to first device; and (a2) after each of the finite time periods following the transmission of the respective first messages from the first device to the second device, ceasing to use the first device to listen for second messages transmitted from the second device to the first device until after the first device transmits another first message to the second device.
摘要:
An electronic faucet sensor assembly includes a base having a pair of openings facing in a generally downward direction when the assembly is mounted in an electronically operated faucet. There is an infrared transmitter positioned in one of the openings and an infrared receiver positioned in the other opening. There is a lens mounted to the base and covering the transmitter and a second lens mounted to the base and covering the receiver. Electrical lead wires are attached to the transmitter and to the receiver and the lead wires extend through a channel located in the base. There is a strain relief at one end of the channel and there is a rib to isolate the leads extending between the strain relief and the transmitter and receiver so as to prevent electrical contact therebetween. The channel is filled with a potting compound to provide a watertight environment for the electrical components.
摘要:
The time period that a foot is in contact with the ground during a stride taken by a user, and the period that the foot is not in contact with the ground between strides taken by the user are determined by processing and analyzing the output signal of an accelerometer. The accelerometer is mounted on the user such that its acceleration sensing axis senses acceleration in a direction substantially parallel to the bottom of the user's foot. The output of the accelerometer is high-pass filtered, amplified, and fed to the input of a micro-controller, which monitors the signal for positive and negative signal spikes that are indicative, respectively, of the moment that the foot of the user leaves the ground and the moment that the foot impacts with the ground. By measuring time intervals between these positive and negative spikes, average "foot contact times" and "foot loft times" of the user may be calculated. To derive the pace of the user, the average foot contact time is multiplied by a first constant if it is less than 400 milli-seconds (ms) and is multiplied by a second constant if it is greater than 400 ms. This pace value may, in turn, be used to calculate the distance traveled by the user.
摘要:
The time period that a foot is in contact with the ground during a stride taken by a user, and the period that the foot is not in contact with the ground between strides taken by the user are determined by processing and analyzing the output signal of an accelerometer. The accelerometer is mounted on the user such that its acceleration sensing axis senses acceleration in a direction substantially parallel to the bottom of the user's foot. The output of the accelerometer is high-pass filtered, amplified, and fed to the input of a micro-controller, which monitors the signal for positive and negative signal spikes that are indicative, respectively, of the moment that the foot of the user leaves the ground and the moment that the foot impacts with the ground. By measuring time intervals between these positive and negative spikes, average "foot contact times" and "foot loft times" of the user may be calculated. To derive the pace of the user, the average foot contact time is multiplied by a first constant if it is less than 400 milli-seconds (ms) and is multiplied by a second constant if it is greater than 400 ms. This pace value may, in turn, be used to calculate the distance traveled by the user.