USA As Represented by Secretary of the Navy

Helene B Anderson

Francis J O'Brien, Jr

Nathan Johnnie

Joseph W Robicheau

An electrolyte detector is provided that includes two micrometers which slide relative to each other along a frame to adjust the electrolyte detector to a size of the battery. A transmitter rod and a receiver rod support an acoustic transmitter and an acoustic receiver, respectively, and are slidably mounted with respect to the micrometers. The micrometers measure the position of the transmitter and receiver for placement on the side of the battery at a desired level of electrolyte. A transmitter director and receiver director concentrates the transmission and receipt of acoustic energy to locate the electrolyte level. An electronic circuit analyzes the received signal to determine whether the signal is transmitted through air or through an electrolyte.

Battery electrolyte level detector apparatus

A device for recovery of physical objects includes a chain having two ends and a retriever attached to one of the ends. The retriever is configured to locate the object to be recovered and to grasp and retrieve that object once located. The retriever includes transducers that detect acoustic frequencies propagating in a fluid medium. Independent transponders, which can be deployed from the retriever; are provided for deployment in an area to be searched. Each transponder emits a predetermined acoustic frequency that is detectable by the transducers. The transducers signal movement of the recovery device for retrieval of the object.

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West Greenwich, RI, United States of America

Helene B Anderson