P. M, Statzell. anil J. L. Kucker, of Philadelphia, have taken measures to secure a patent for several improvements in the Watchmen's Register Attachment lor clocks. This is a contrivance to render more efficient an apparatus which is used in many large establishments where a night watchman is employed. The system generally adopted is to huve a clock so arranged that the watchman. by pushing a pin or by some other similar operation, acts upon a dial, which, upon examination next morning, exhibits a record of his vigilance. The instruments in general use are open to many objections, of which the chief is their liability to be tampered with by an unfaithful officer. To supply a more efficient register, which cannot be altered, is the intention of this patent, -and for this purpose several improvements have been introduced. The first is the registering apparatus, which cansists of a dial divided into 24 equal parts, corresponding to the half hours, which are aU marked by a numeral, one 01 which will al ways be visible through an aperture in the clock dial. The motion o1 the registering dial is regulated by a ratchet wheel and spring pawl, which are acted upon by a contrivance connected with the clock- work, and 30 adjusted that. at the end of each half hoiir it assumes a vertical position and on a lever being mo ved by the watchman, it i m parts motion to the ratchet-gear and registering dial, which is thus made to rotate and exhibit another numeral through the aperture already mentioned. Should the watchman have neglected to visit the clock at any of the half- hours, it is possible that, to avoid detection, he might seek to turn the register more than one division at his next visit, this fraud is prevented by an arrangement, which holds the ratchet click in its place (after it has passed over one tooth of the ratchet wheel) until the watchman's lever can 110 longer affect it. Another improvement 18 i 11 the manner by which it is rendered impo ible to shift the hands of the clock except by tha authorized p j.AJ1.