US113988A - Improvement in watchman s time-detecters - Google Patents

Description

J. 11111111111@i WATGHMAN'S TIME DETEGTGR;

No. 113,988. PatentedApr. 25, 1871.

4hand the false dial a,

UNITED STATES PATENT OEEIcE.

JAMES DUNNING, OF BANGOR, MAINE.

IMPROVEMENT IN WATCHMANS TIME-DETECTERS.

Specification forming part of Letters Patent N o.- 113,988, dated April 25, 1871.

'proved \Vatchmans Time-Detecter; and I hereby declare the following to bea full, clear, and exact description of the-same, which will enable others to make reference being had to theaccompanyin g drawing, formihgua part oithis specification, in, 'Which- Figure 1 is a. front view with the door open; Fig. 2, a section yof the slidin g panels and marking device. Fig. 3 shows the spring of the lever.

Same letters show like parts.

I am aware that there are several devices for checking the time of watchmen and telling when they visit the several points upon their beats; but these are all expensive and of complicated construction.

The object of my invention is to produce a detecter that will perform its work with accuracy, and Aat the same time be simple, durable, and comparatively cheap.

By reference to the drawing I will now explain my device.

I .inclose in a secure box, A, a clock of any desired construction, capable of running eight days, il' desired. The hands of the clock being removed, Iplace upon the arbor of the hourin such a way that at 12 oclock the figure 12 on the false dial will correspond with the same g'ure on the dial ot' the clock, and so that it will revolve as the hour-hand would have done. This dial a is numbered backward, as will be seen, so thatas the clock is set in motion, when an hour passes, the figure 1 of the false dial will point to the ligure 12 on the dial of the clock, showing 1 oclock, and so with the other hours. This false dial is also divided by concentric circles into seven rings or portions, which are marked with the days of the week, the outer circle being Monday, second Tues day, Ste. 1

The door B (shown open in the drawing) has a space, I), (seen in dotted lines,) cut from its center. Gn each side of Athe door are the slides c c?, (see scction,) which are connected by fast-.- anni gs which pass through the hole I. These and use my invention,

slides move together. in a vertical plane between the guides f. Through the slides c d, at e, passes;l the marking device, and at g they are attached by the pivot y, passing through the slot in the lever 'It to said lever, the ful crum of which is at j, at one side of the slides.

The other end of the lever has a cavity for the pins Lk, Ste., which are arranged upon the opposite side of the slide c, and also lettered to correspond with the days of the week. They are at such a distance from each other that when the lever is moved order the center of the lever, where it is attached to the slides, moves a distance just equal to the space between the centers ofthe concentric circles of the false dial a, and of course carries the slides and marker attached to them with it. y

The marking 'device is shown. at Fig. 2 in section, and is very simple in construction and not liable to get out of order. To the outer slide, d, is attached the knob l, and through the knob and both slides o and d passes the tube m. Vithin this tube is fitted the rod n, having itsend o fitted for the key p, .and in its other extremity a cavity for the reception of a pencil, q. It has also a rim, r, and the spiral spring s, pressing against this shoulder, keeps the rod in place. tached to the inner which the pencil passes, and serves as a guide for it, and also a bearing for the spring s.

The operation of my invention is as follows: The marker of pencil g, as shown in the drawing, Fig. 1, is just opposite the center of the circular ring marked Monday,7 and the dial shows 12 oclock. Suppose the watchman to come in at half-past 12. The line numbered 12 on the dial will then be pointing to or in that position, and the watchman, applying the key to the rod n, forces the pencil in against that part of the dial then opposite to the pencil-point, and would make a mark midway between the lines 12 and 1, at z, showing that he came in at 12.30, and so on through the night. pon his removing the key the spring s brings the rod n and pen* eil attached to it back to its place. The dial a may, ofcourse, be subdivided to show the portions of an hour.

When it becomes necessary to change the to the next one in The metallic strap t, atslide, has a hole, through day the door B is opened and the lever h lifted from the pin rnarked Monday and placed upon that marked 'Iluesday',77 next to it.

The spiral spring u, Fig. 3, allows the lever h to be raised enough to be taken from the pin, and keeps it on when desired. The lever being thus moved downward, the slides c and d, attached to it, and the marker or register also move 'with it, as before stated, the distance of the width of the circles on the dial, andthe pencitpoint is brought opposite the center ofthe rin g marked l.uesday,77 and the Watch makes the dots, as before, around this ring, using the key whenever lie visitstlie place, and registering the time on the false dial. i 0f course the box is to loe kept looked, that it may not be 'tampered with, end the only ,Way in wliieli tile marks een.i be made by the use et'tlie lrey. if by accident the ie ver should not be changed to the appropriate day, double roiv oi' marks would "ne shown around the dial-face, es it would be alinstan.

impossibility for tivo marks to be mede in tlie saine place.

By elianging the pencils each week, and using those oi' a different color, one dial. may be made to last a long time.

Of course a'one-day clock can be used; but this necessitates daily winding.

The peneil q oi' suoli a length es never te touch the diei except when pushed in by 'elle ley.

.l do ele-i271 revolving; dial. and is sliov/n. i 48,0418'.

broadly, lie use ci' a Nilis has been' used be Lne patent oi' J. if.. feiern-i,

l do not claim any partoi` the devices shown in the pti-tent of S. Fournier, No. 20,786.

My time-detecter has no wheels giving n1otion to a rack for a portion of the twenty-four hours like those shown in said patent, and

'which are claimed in combination with a clock; nor has it any analogous devices. Thel only mechanical devices employed to obtain motion are those o1" the ordinary eiglitday clock, which I do not claim. Neither laas it a carriage, in combination with a rack, through which ruoli tlie eloelr givesmotion to said carriage, as described in tile second claim of said patent. 'Elie clock in. my device ylies nothing whatever to do wit): tile marking device or its diurnal adjustment. Its oiiice is simply to revolve the dial7 end, as before stated, I do not claim this revolving dial, broadly.

adjusted bylland only, is not affected ny 'the ebelt-Works. My device is simpler, less liable to out of order, and can be aiorefied et amucli. price. than seid Four "iierlsfwliile at the saine time it is equally efctuel., Nor do elaim tlie devices shown in the patent o B'. l?. Bains, No. 215,918, they diiier- 'Frein 'niine in eonetruetieu and operation. l elaini as iny invention, and desire Letters Patent, is-

The combinetien and arrangement ofthe 'within-described dial ivi ille marker, opere as setfertli. the elia ser?, through which.

o the The marking device,

Images