US181519A - Improvement in watchmen s time detecters - Google Patents

Description

J. E. BUERK.

WATCHMENS TIME DETECTOR.

115.181,519. Patented Aug.z9,1e7e.

jlfrwe 1% om N. PETERS. PHOTO-LITHOGRAPMER. wASHlNGTON, D C.

UNITED STATES PATENT OFFICE..

JAcOB E. BUEBK,IOE BOSTON, MASSACHUSETTS.

IMPROVEMENT zIN WATCHMENS TIME DETECTERS.

Specication forming part of Letters Patent No. 1S 1,519, dated August 29, 1876; application filed July 22, 1ere.

To all whom it may concern Be it known that I, JACOB E. BUERK, of Boston, in the county of Suffolk and State of Massachusetts, have invented a new and useful Improvement in Watchmens Time Detecters, which improvement is fully set forth in the following specilication, reference being had to the accompanying drawing, in which- Figure l represents a horizontal section in v the plane :c w, Fig. 2. Fig. 2 is a vertical sec? tion in the plane y y, Fig. l. Fig. 3 is an inverted plan of the movement detached.

. Similar letters indicate corresponding parts. This invention relates to certain improve ments in that class of watchmens time-detecters which I have described in Letters Patent, No. 48,048, granted to me J une 6, 1865. My present improvement consists in the combination, with the partition-plate which separates the marking' devices in a watchmans time-detecter from the clock-movement, and with the front and back plates, between which said clockmovement is situated, of a protecting-case, which is rmly secured t0 the back plate, and one edge of which bears against the inner surface of the front plate, while its other edge bears aga-inst the partition-plate between the marking devices and the clock-movement, so that by the combined action of said case with the .front and the partition plate the clock-movement is effectually protected against impurities, which otherwise are liable to interfere with the correct operation of the clock.

My improvement consists also in the com'- bination, with the soft-metal stud that cooperates with the guide -pin for the keys which operate the marking devices, of a steel face, so that the operation of manufacturing said stud, and of securing it in position, re-

mains the same as before, while the steel face,

prevents the keyswfrom wearing said stud, and thereby the correct operation of themeehanism is insured.

In the drawing, the letter A designates the main case, which incloses the working parts' of my Watchmans time-detecter. The clockmovement B is situated between the front plate C and the back plate D, and with these two plates is combined a partition-plate, E, which separates the marking devices F from the clock-movement. With the front plate G, the back plate D, and the partition-plate E is combined a secondary case, G, which is firmly secured to the back plate, and the upper edge of which bears tight against the in- I 'fectually protected againstthe entrance of impurities, such, for instance, as loose particles of tobacco, which are usually found in the pockets of Watchmen, and which, when they find their way into the clock-movement, seriously interfere with the correct operation ofthe detecter.

From the outside of the partition-plate projects a pin, a, which forms the guide for the keys used for operating the marking devices F. With this pin is combined a stud, b, which is firmly secured to the inner surface of the front plate C in such a position that the bits of the keys, on being turned, are closely conned between the shoulder of the pin a and the inner surface ofthe stud b, such being necessary in order to cause the bit of each key to act on the particular marking de- Vice or devices for which the same is designed. rIhe stud b is made of brass or other soft metal, which can be easily worked; but I have found that the inner ends of the bits soon Wear out the brass face of the stud, and in a short time the keys have an end play on the pin a, whereby their correct action is interfered with. To obviate this difficulty I have combined with the soft-1netal stud b a steel facing, c, which effectually prevents the bits of the keys from Wearing into the stud, while at the same time the labor ofmanufacturing said stud, and of securing the same in its position, remains the same as before, and the cost ofthe stud is but slightly increased.

I disclaim in this present application everything shown and described in my Patent, No. 48,048, referred to.

What I claim as new, and desire to vsecure by Letters Patent, is

l. The combination, in a watchmans time-v detecter, of the secondary case G, front plate C, back plate'D, partition-plate E, marking device F, and clock-movement, constructed to operate substantially as described, said sec plate, substantially as and for the purpose specified. 'Y

In testimony that I claim the 'foregoingl have hereunto set my hand and seal this 1st day of July, 1876.

JACOB E; BUERK.

Witnesses:

JOHN O.A BUERK, E. F. KASTENHUBER.

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