Communications: electrical – Audible indication
Reexamination Certificate
2000-09-25
2001-07-17
Wu, Daniel J. (Department: 2632)
Communications: electrical
Audible indication
C340S384600, C340S384700, C324S542000, C324S539000, C324S556000
Reexamination Certificate
active
06262654
ABSTRACT:
BACKGROUND
1. Field of Invention
This invention relates to electronic tool devices, more specifically a device used to identify multiple two-conductor alarm wires that originate from a common location and terminate at individual remote locations.
2. Description of Prior Art
Two-conductor alarm wire is used in the installation of hard-wired alarms systems. The two-conductor alarm wire connects the remotely placed sensors to a main control panel. In residential and commercial applications the sensors could monitor windows, doors, phone service panels or other items that need to be monitored by an alarm system. During installation of such an alarm system identification of conductor pairs necessary for the sensors can be a time consuming task on applications that require the monitoring of many windows and doors, especially if they are located at distant remote locations.
An extensive search was done for prior art in this field of invention but nothing revealed itself to be close to my invention except U.S. Pat. No. 4,471,293 by inventor Otto Schnack issued on Sep. 11, 1984. U.S. Pat. No. 4,471,293 is a multi-conductor cable test unit for testing multi-conductor cables for shorts, broken wires and crossed wires. U.S. Pat. No. 4,471,293 uses light-emitting diodes to indicate status of tests it is performing on cables. It does not provide a way to immediately alert the user of its status while user is at a remote location. Nor does the invention provide a way to locate buried wires within wall of a structure. Nothing is currently available with the ability to perform these two tasks simultaneously.
SUMMARY INCLUDING OBJECTS AND ADVANTAGES
An audible alarm-wire identification tool, comprises a plurality of test leads conductors and common lead conductors. The conductors connect to an electronic circuit which comprises a micro-controller programmed to monitor the conductors and control activation of a piezo-electric transducer. The micro-controller also imposes frequency pulses onto the test lead conductors during monitoring of the test leads in a way unlike any other device available. This feature allows an inductance amplifier probe to pick up the frequency pulses along the lengths any alarm wires connected to the test lead conductors. Any alarm wires that are connected to the test lead conductors could be located by an inductance amplifier probe should the alarm wires happen to be buried behind walls. The electronic circuitry will sound an appropriate number of beeps from a piezo-electric transducer if any of the connected alarm wires being monitored creates a complete circuit between any of the test lead conductors and any of the common lead conductors. This triggering action could be the result of a cutting tool used at the remote opposite end of the connected alarm wire due to the metallic blades momentarily shorting the two conductors of the alarm wire, one lead is connected to a test lead conductor of the invention while the other lead is connected to a common lead conductor of the invention. The electronic circuitry simultaneously imposes an appropriate number of frequency pulses to the test leads. The frequency pulses correspond to the number of beeps emitted by the piezo-electric transducer. This feature will allow a user of the invention to pick up the frequency pulses with an inductance amplifier probe should he or she be at such a great distance away from the invention that a piezo-electric transducer could not be heard. The design of the circuitry causes the frequency pulses to be imposed on every test lead conductor. Since it is impossible for the user to be at every remote location a connected alarm wire terminates this is a very acceptable design.
OBJECTS AND ADVANTAGES
Accordingly, several objects and advantages of this invention are portability, quantity and quality of unique functions and, ease of use resulting in increased user efficiency during identification of, and quality control of alarm system installations.
Still further objects and advantages will become apparent from a consideration of the ensuing description and accompanying drawings.
REFERENCES:
patent: 4282479 (1981-08-01), Deboo et al.
patent: 4814693 (1989-03-01), Coben
patent: 4837488 (1989-06-01), Donahue
Nguyen Tai T.
Wu Daniel J.
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