US885366A - Watchman's clock. - Google Patents

Description

No. 885,366. PATBNTED APP.. 21, 1908.

' A. A. NEWMAN.

WATGHMANS CLOCK. APPLICATION FILED DEU. 4, 1906.

UNITED SIAISESMu ABRAHAM A. NEWMAN,

OF CHICAGO, ILLINOIS.

WATCHMANS CLOCK.

Application filed December 4, 1906.

To all 'whom it may concern: e

Beit known that I, ABRAHAM A. NEWMAN, a citizen of the United States, residing at Ohicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Watchmens Clocks, of which the following is a speciiication.

My invention relates to certain new and useful improvements in watchmens clocks, and is fully described and explained in this specification and shown in the accompanying drawings, in which Figure 1 is a side elevation of my improved clock, a portion of the side walls of the case being broken away to show the interior construction, and certain of the parts being shown in the section indicated in the line 1 1 of Fig. 3; Fig. 2 is a similar view showing the parts in a different operative position; Fig. 3 is a top plan of the clock, a portion of the case being broken away in the section indicated by the line 3-3 in Fig. 1 and Fig. 4L is a perspective view of one of the keys which are used.

Referring to the drawings, A, is a suitable dial, preferably of paper or the like, which is adapted to be rotated by means of suitable clock mechanism, not here illustrated. Above this dial is a plate, B, having a slot, l), through which access may be had to the dial from above. The space above the plate, B, is divided into two parts by means of a vertically extending plate, C, the space to the right-hand side of this plate, as viewed in Fig. 3, being utilized as the key-space of the clock, and the space to the left-hand side of this plate being utilized as a container for the clock-mechanism.

D, indicates a movable plate which is provided with slots, d, running over screws, c, on the plate, O, so that said plate, D, can be moved longitudinally and said plate is normally held in the position shown in Fig. 1 by means of a spring, D1, connecting the movable plate with a stationary point upon the plate, O. yThe plate, C, is provided with an ear, D2, extending at right angles to its plane, said ear being of such size as to lie over and cover completely the slot, b, in the plate, B, and being so positioned that when the plate, D, is in its normal position it will cover said slot. One end of the plate, D, is provided with a cam-surface, D3, the extreme portion of which is formed into a point, D4. The wall of the clock case is provided with a suitable key-hole in line with which is placed a Specification of Letters Patent.

Patented April 21, 1908.

Serial No. 346,277.

key-guide, E, adapted to enter a hole, f, in the shank of a key, F. Each of the keys, F, comprises, in addition to its longitudinally extending shank and the handle thereon by which it may be rotated, a substantially 'liat web, f1, extending preferably tangentially yfrom the shank of the key, a short web, f2,

substantially at right angles to the web, f1, a web,j'3, forming an obtuse angle with reference to the web,f2, and a fourth web,f1, substantially at right angles to the web,f3, and forming an acute angle with reference to the web, f1. Each of the keys has along the edge of the web, f4, a projecting point or marker adapted to engage the paper-dial and make a perforation therein, and each key is also rovided with a projecting shoulder, f, which is adapted to engage with the camsurface, D3, upon the movable plate, D4.

In operation the key is inserted into the clock in the position shown in Fig. 1, the keyhole of the clock being so arranged that the key must enter in this angular position. It is then rotated through an angle of nearly one hundred and eighty degrees to the position shown in Fig. 2, and during this movement the shoulder, f, engages with the cam-surface upon the movable plate, D, and forces the same against the action of the spring, D1, into the position shown in Fig. 2, and in fact slightly beyond this position so as to expose the slot, b, in the plate, B, and permit the passage of theprojecting marker, f5, upon the key to the dial. During this movement and towards its end the shoulder rides over the projecting point, D4, upon the plate, D, so that during the final portion of the movement of the key its rotation is assisted by the spring, D1, instead of being resisted thereby as it is during the Yfirst portion of its movement.

My device is particularly advantageous for a number of reasons. In the first place, until a suitable key is placed in the clock, the slot is closed, so that no access can be had to the lent instrument. Furthermore, a clear impression is assured by reason of the fact that towards the end of its movement the key is assisted in rotation by the action of the cam, D3. Furthermore, by placing the key-hole in such a position that the key must rotate approximately one hundred and eighty degrees and make it extremely difficult to reach the slot in the plate, B, through which the key enters with any instrument but a propdial to make a perforation with a frauduerly constituted key, and I also make the key of such form as to render its fraudulent duplication extremely difficult.

l realize that considerable variation is possible in the details of this construction without departing from the spirit of my invention; therefore, I do not intend to limit myself to the specific form herein shown and described.

l claim as new and desire to secure by Letters Patent :d

1. The combination with a casing having an opening for the entrance of a key, of a septum within the case and between the normal position of the dial and the opening aforesaid, a perforation in the septum, and means normally closing the perforation in said septum and constructed and arranged to be actuated by a key in its movement to uncover the perforation in the septum for the passage of a key.

2. The combination with a case having an opening for the passage of a key, of a septum separating said opening from the normal position of the dial, said septum being provided with a perforation whereby a key may have access to a dial, a cover for said perforation normally closing the same, and means whereby a key may move said cover to expose said perforation for its passage.

3. The combination with a casing having a key-hole, of a septum within the casingbetween said key-hole and the normal position of the dial, said septum being provided with a suitable perforation, a cover adapted to close said perforation, means for holding said cover in position normally to close said perforation, and means whereby the movement of the key will move said cover against the action of said holding means to open the perforation for the passage of the key.

4. The combination with a casing having a key-hole, of a septum within the casing between the key-hole and the normal position of the dial, said septum being provided with a perforation, a cover adapted to close said perforation and a cam upon said cover adapt-` ed to be engaged by a suitable key to move said cover and open said perforation for the passage of the key.

5. The combination with a casing having a key-hole therein, of a septum lying between said key-hole and the normal position of the dial, said septum being provided with a perforation, a sliding plate having an ear adapted to close said perforation, and a cam-surface upon said plate adapted to be engaged by a suitable key to move said plate for the purpose of uncovering said perforation.

6. The combination with a casing having a key-hole therein, of a septum interposed between said key-hole and the normal position of the dial, said septum being rovided Witha suitable perforation, a movab e cover ada ted to close said perforation, means for ho ding said cover normally in position to close said perforation, and a cam-surface having a projecting point over which a key may ride whereby the rotation of a suitable key will ABRAHAM A. NEWMAN.

l/Vitnesses:

C. W. WASHBURNE, J. H. LANDES.

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