Show ALARM AND detector delector mr nicholls of the U S pay department at aan N orleans has invented an alarm and thief detector of which the picayune gives the following account the former is so constructed construct ea as on being opened to produce a tremendous noise similar to the screeching of a gas escape of a locomotive co this is followed by the descent through a tube of a quantity of sonorous balls marble or brass as may be chosen which are at len ien length rth thrown successively from a hopper r to the floor rattling with terrific force rn in the midst of the confusion of sounds produced by the falling balls a bell begins to toll and so loud as positively to startle even a person who is prepared to 6 encounter the alarm the machinery which puts in operation tio the alarm occupies but a small space and can be put inside money safes armories or other pieces of furniture in which valuables are preserved the noise created by it extends to a great distance and would effectually scare a thief to a precipitate flight the thief detector is a simpler and more portable piece of machinery designed to be placed inside doors cr windows of stores and dwelling houses as a protection against dep predators reda tors it consists of a heavy grating which is suspended within a hollow bollow groove in the th upper part of the door or window frame and connected by liy a spring with the floor beneath nc ath immediately the foot of the robber presses on the floor inside the thresh hold bold the spring is put in action when wilen down falls the grating and the intruder is caught like a rat in in a trap |