What is claimed is:
1. An ink jet head, comprising:
partition walls made of an piezoelectric material and for dividing ink chambers; and
driving electrodes provided on the partition walls, wherein lead conductors each of which is provided at a bottom portion of each ink chamber and is connected with a driving circuit, each lead conductor connected with the driving electrode so that a voltage is applied from the driving circuit through the lead conductor to the driving electrodes for each ink chamber, whereby the partition walls are deformed by shearing forces and an ink is jetted from each ink chamber.
2. The ink jet head of claim 1, further comprising:
a printed circuit board electrically connected with the driving circuit, wherein the partition walls are mounted on the printed circuit board so that the printed circuit board constitutes the bottom portions of the ink chambers, and wherein the lead conductors are provided on the printed circuit board at positions corresponding to the bottom portions of the ink chambers.
3. The ink jet head of claim 1, wherein the printed circuit board is provided with through-holes at the positions corresponding to the bottom portions of the ink chambers, each lead conductor provided at the bottom portion for each ink chamber is connected with a through-electrode provided in each through-hole, and the through-electrode is connected with the each driving electrode.
4. The ink jet head of claim 1, wherein the printed circuit board is made of a material having a Young’s modulus larger than that of the piezoelectric element.
5. The ink jet head of claim 1, wherein the printed circuit board is made of a non-piezoelectric ceramics material.
6. The ink jet head of claim 5, wherein the non-piezoelectric ceramics material is at least one of alumina, aluminum nitride, zirconia, silicon, silicon nitride, silicon carbide, and quartz.
7. The ink jet head of claim 1, wherein at least a surface of the printed circuit board constituting the bottom surface of the ink chamber is a smoothed surface.
8. The ink jet head of claim 2, further comprising:
a driving circuit board provided separately from the printed circuit board and electrically connected with the printed circuit board, wherein the driving circuit is provided on or in the driving circuit board.
9. The ink jet head of claim 2, wherein the driving circuit is provided on the printed circuit board and is connected with the driving electrodes through the lead conductors.
10. The ink jet head of claim 2, wherein an ink feeding passage communicating with the ink chambers is formed in the printed circuit board.
11. The ink jet head of claim 1, wherein each lead conductor is connected with each driving electrode at the bottom portion of each ink chamber.
12. The ink jet head of claim 1, wherein the partition walls are walls for partitioning ink chambers into each ink chamber.
13. The ink jet head of claim 2, wherein the lead conductors which are provided unwrappedly on the printed circuit board is electrically connected with the driving electrodes when the driving electrodes is provided on the partition walls.
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 method comprising:
configuring a spa controller at a user site to control operation of a plurality of spa components and to generate status data regarding the status of one or more of said components;
configuring a spa network adapter at the user site to communicate with said spa controller to receive data including status data from said spa controller and to transmit data and commands to said spa controller, the spa network adapter having a wireless transceiver;
sensing the current drawn by one or more selected spa components and determining the power being drawn by said one or more spa components to generate power data;
transmitting both the power data and status data from the first wireless transceiver of the spa network adapter over a wireless link to another component of a spa networking system;
employing an address unique to the user site in the course of transmitting a command received from a spa owner computer or a spa dealer computer to the wireless transceiver of the spa network adapter; and
further configuring the spa network adapter to transmit a received command to the spa controller for execution.
2. A method comprising:
configuring a spa controller at a user site to control operation of a plurality of spa components and to generate status data regarding the status of one or more of said components;
configuring a spa network adapter at the user site to communicate with said spa controller to receive data including status data from said spa controller and to transmit data and commands to said spa controller, the spa network adapter having a wireless transceiver;
sensing the current drawn by a selected spa component to generate current data;
transmitting both the current data and status data from the first wireless transceiver of the spa network adapter over a wireless link to another network component of a spa networking system;
employing an address unique to the user site in the course of transmitting a command received from a spa owner computer or a spa dealer computer to the wireless transceiver of the spa network adapter; and
further configuring the spa network adapter to transmit a received command to the spa controller for execution.
3. The method of claim 2 wherein the selected spa component is one of a spa heater or a spa jet pump.
4. The method of claim 2 wherein the spa owner computer comprises part of a handheld device.
5. The method of claim 2 wherein the spa dealer computer comprises part of a handheld device.
6. The method of claim 2 wherein said command is a first command to turn on a spa jet pump.
7. The method of claim 6 wherein said spa controller turns on a spa jet pump in response to said first command.
8. The method of claim 7 further comprising employing the spa controller to transmit data to the spa network adapter confirming that the spa jet pump has been turned on.
9. The method of claim 8 further comprising sending power data relating to the operation of the spa jet pump to the spa network adapter after the spa jet pump has been turned on.
10. The method of claim 9 further comprising updating a server web page with the latest status and power data regarding said spa jet pump.
11. The method of claim 2 wherein said unique address is a MAC (media access control) address.
12. The method of claim 11 further comprising the step of employing a secure socket direct data tunnel in the course of receiving a command to be transmitted to the spa controller.