This invention relates to a liquid level reduction alarm device for a liquid reservoir vessel kept in liquid communication with a braking master cylinder, preferably in automotive use and adapted for delivery of alarm signal to the vehicle driver, if the liquid level in the reservoir vessel should reduce to an excessive degree, so as to warn him to replenish the brake oil.
It is a main object of the present invention to provide a substantially shock-proof electric and built-in alarm system highly effective in the aforementioned field of engineering.
A further object is to provide an effective alarm system of the above kind which is operable magnetically and automatically responsive to the liquid level contained in the reservoir vessel.
A still further object is to provide an alarm system of the above kind which is highly effective to avoid misoperation caused by outside vehicle shocks.
These and further objects, features and advantages of the present invention will become more apparent from the following detailed description of the invention by reference to the accompanying drawing illustrative of a preferred embodiment of the present invention.