The fourth and last water closet relate patent application (1885/7065) was submitted on 19th June, 1885 and entitled “Improvements in Apparatus for Regulating the Supply of Water to Waterclosets and other Situation, and for Preventing Waste therefrom”.
Whilst this new invention was capable of being used in combination with his previous patent (1884/7601), it was more specifically designed for use with siphon principle water closets. Its purpose was again to prevent waste by stopping the flow of water, by the use of a valve or equivalent connected to the discharge pipe of the cistern as explained in the extract:
My Invention relates to apparatus used for the purpose of preventing waste by stopping the flow of water (so frequently occurring through partial syphonic action) in Flushing Cisterns and others made on the symphonic principle and which are used especially for Water Closets and other Sanitary purposes.-Though capable of being used in combination with the apparatus set forth in my patent No. 7601, wherein there is provided a valve or its equivalent or admitting air into the syphon when the flow of water is required to cease, my Invention is especially intended to be used in Syphonic Cistern which are not provided with such valve or its equivalent. Its object is to keep the Syphon full of air at all times except when in use so that partial symphonic action or continuous leakage from any cause whatsoever cannot take place.
To accomplish the above object I provide a valve, tap, pipe or equivalent and connect it to the discharge pipe of cistern in such a way that, when desired, it will admit air into the syphon at any point in the long leg of same but preferably below the bottom of the short leg.
The application was successful and the patent was sealed.