Wireless level switch

• US 6,028,525 A
• Filed: 03/03/1998
• Issued: 02/22/2000
• Est. Priority Date: 03/03/1998
• Status: Expired due to Term

• Current Assignee: Harvard Apparatus, Inc. (Harvard Bioscience, Inc.)
• Original Assignee: Harvard Apparatus, Inc. (Harvard Bioscience, Inc.)
• Inventors: Shukla, Ashok K, Shukla, Mukta M
• Primary Examiner(s): TONG, NINA C
• Application Number:
  US09/033,692
• Time in Patent Office: 721 Days
• Field of Search: 340/689, 340/686.1, 340/691.1, 340/692, 340/693.1, 340/571, 340/539
• US Class Current: 340/689
• CPC Class Codes: G01N 2030/8804 automated systems
• CPC Class Codes: G01N 30/88 Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86

Abstract

This invention relates to a tilt switch, which when activated sends signals to a wireless remote receiver. The receiver will alert the human operator and/or execute a process or any programmed action.

Claims

1. A system for automatically starting a recorder or a control device in a liquid chromatography injection valve system to get the data recorded simultaneously or control the system simultaneously, which comprises:

a levelness sensing means is attached to a liquid chromatography injection valve which comprises a handle;

wherein said sensing means comprises a housing for housing a tilt switch, a wireless transmitter system, and a battery;

wherein said injection valve is filled with sample of the liquid;

wherein said sample is injected into a separation column by moving said handle;

wherein said tilt switch is coupled to the transmitter system and the battery such that the transmitter system is activated when said tilt switch reaches a desired angle upon the movement of the handle, and said transmitter system sends a unique coded signals to a wireless remote receiver as soon as the sample is injected and said handle is moved;

wherein said receiver is attached to the recorder or the control device;

wherein said recorder or the control device is activated after receiving said signals from the transmitter system for starting to record the data simultaneously or controlling the system simultaneously.

2. The system as in claim 1 wherein said tilt switch is an inclinometer switch.

3. The system as in claim 1 wherein said transmitter and system is a transreceiver.

4. The system as in claim 1 wherein said transmitter system is a transponder.

5. The system as in claim 1 wherein said signals are selected from at least one of a group consisting of light, infrared light, frequency, radio frequency, ultra sound, sound and 900 mega hertz.

6. The system as in claim 1 wherein said receiver has a delay switch.

7. The device in claim 1 can have other sensors like smoke detector, wetness sensor, gas sensors, and temperature sensors.