US915573A - Alarm-clock. - Google Patents

Description

W. DUPEN, SE. a W. DUPEN, In.

ALARM CLOCK.

APPLIOATION FILED KAY 25, 1908.

Patented MLr.16,19O9

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APPLICATION FILED MAY 25, 1908.

Patented Mar. 16, 1909.

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UNITED STATES-EXTENT OFFICE.

WILLIAM DUPEN, SE, OF CHICO, AND WILLIAM DUPEN, JR, OF SACRAMENTO,

CALIFORNIA.

ALARM-CLOCK.

Specification of Letters Patent.

AppIication filed May 25, 1908.

Patented March 16, 1909.

Serial No. 434,860.

To all whom it may concern:

Be it known that we, WILLIAM DUPEN, Sr., a citizen of the United States, residing at Chico, Butte county, California, and WILLIAM DUPEN Jr., a citizen of the United States, residing at Sacramento, in the county of Sacramento and State of California, have invented certain new and useful Im rovements in Alarm-Clocks; and we do eclare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

Our invention relates to clock movements, and more especially to that ty e which require winding only once in eig 1t days, and which have provision for sounding an alarm at given periods. Heretofore, in devices of this character, although the chronometer was wound onl once during the eight days, the alarm mec anism had to be wound for each successive alarm striking twice during each day.

It is the object of our invention to avoid these difficulties and to provide a clock which will strike its alarm only once a day, although being completely operative for eight consecutive days without further winding.

Another object of the invention is to provide a clock of this character which will be efiicient in operation, practical for all puroses, and comparatively cheap to manuacture.

Further objects will appear as the following specific description is read in connection with the accompanying drawings forming part of this specification, and in which,

Figure 1 is a face view of the clock; Fig. 2 is a front elevation of the mechanism with the dial removed; Fig. 3 is a detail sectional view on the line 33 of Fig. 2, showing the twenty-four-hour vheel in one position; Fig. 4 is a similar view showing the twentyfour-hour wheel-in its other position; Fig. 5 is a side elevation of the mechanism removed from the case and with certain unnecessary parts removed; Fig. 6 is a fragmentary sectional view taken on the line rx of Fig. 5 Fig. 7 is an enlarged view of certain connected parts of the alarm mechanism; and Fig. 8 1s a similar view to Fig. 6, showing the locked position of the cam disk.

Referring more especially to the drawings,

1 represents the casing of the clock, which is provided with the usual glass front, 2, and an indicating dial, 3, secured to the front plate, 4, of the mechanism in any suitable manner. The front plate, 4, is spaced from the rear plate, 5, and an intermediate mounting plate, 6, by posts, 7. All the foregoing is found in any ordinary clock and needs no further specific description. The usual eight-day clock train is also carried by the frame, and only parts which cooperate with the alarm mechanism have been here illustrated, such as the main gear wheel, 8, the fly-wheel, 9, the minute arbor, 10, the hour gear, 11, and its associated gear, 12, which drives it.

Journaled in the plates 4 and 5 is a shaft, 13, upon which there is secured a ratchet wheel, 14, adapted to be engaged by the pawl, 15, carried upon the main alarm gear, 16, which is loosely carried by the shaft. A s ring, 17, having one end attached to the s aft, 13, and its other end secured to one of the spacing posts, 7, is wound in the usual manner by attaching a key to the threaded end, 18, of the shaft, 13. Loosely mounted upon the shaft, 13, is a sleeve, 19, carrying a disk, 20, which is provided with a pair of diametrically opposite cams, 21, inchned in opposite directions so as to present a cam face to the releasing lever, 22, at each half revolution of the disk. A slot, 23, is providedin the disk adj acent its periphery which is adapted to receive a pin, 24, carried by the gear wheel, 16, and this pin is normally kept in one end of the slot by a spring, 25, carried by the disk, 20, for a purpose which will hereinafter be described.

Keyed to the arbor 10 is a pinion, 26, which meshes with the gear 12 and thereby drives the hour gear, 11, in the usual manner. Meshing with this hour gear is a gear, 27, which we shall herein term the twentyfour-hour gear, as it is twice as large as the gear 11 and being in mesh therewith only makes a complete revolution once every twenty-four hours. This gear is mounted u on a shaft, 28, to which is attached the a arm indicating hand, 29, and the alarm setting nut, 30. Below the dial and adjacent the wheel, 27, we secure to the shaft 28 an annular ring, 31, having a projecting lug, 32, adapted to be engaged by a cam-shaped collar, 33, carried by the gear, 27. Underneath the gear 27 we secure to the shaft a conical sleeve, 34, against which bears a leaf spring, 35, which is adapted to normally force the cam collar, the conical collar and the gear upwardly. Projecting at right-angles to the releasing lever 22 on the shaft 36 is a stop lever, 37 which rojects into the path of the arm, 38 carried y the escapement pawl, 39.- The arm 37 has an upwardly projecting stud, 40, which is engaged. with a swinginglever, 41, pivoted to the frame plate 4, and provided with a projection, 42, adapted to en gage the conical sleeve, 34, so that the-swinging lever 41 is moved away and into engagement with the arm 37 so as to release the arm 22 from the cam, 21, with which it is in engagement. The arm 37 and the arm 22 are normally held in engagement with the swinging lever 41 and disk, 20, respectively, by a spring, 37 carried by the frame plate, 4.

Motion is conveyed to the escapement wheel, 43, by means of a pinion 44 in mesh with the gear, 16, and secured to an arbor 45 upon which there is mounted a gear, 46, adapted to engage the pinion, 47, carried upon the escapement wheel shaft, 48.

To set the device for a given time, the setting nut 30 is turned, which revolves the shaft 28 and thereby sets the hand, 29 to the proper position and also moves the collar 31 with its projecting lug, 32, over the cam, 33. i After an alarm has been set for a given time, and the spring, 17, wound up, the operation is as follows: The hour gear revolving continuously, moves the twenty-four-hour gear in the opposite direction, and the cam collar slides around underneath the lug 32 until the end of the cam is reached, when the spring 35 will force the wheel upwardly, thus releasing the swinging lever 41 and allowing the spring 37 a to force the arm, 37, with its connected stud, 40, out of the path of escapement lever, 38. At this time the arm 22 has dropped against the cam disk 20, ahead of one of the cams, 21, and the spring 17 has started the wheel 16 which causes the escapement mechanism to operate. "10 prevent the arm 22 from dropping again into engagement with the cam when released, we provide the spring, 25, which abuts against the pin, 24, and carries the cam which has been in engagement with the arm 22 out of alinement with its contact finger, and when the arm 22 is allowed to drop, it falls upon the smooth periphery of the disk, intermediate the cams.

fhen the opposite cam comes into engagement with the contact finger of the operating rod, 22, it is held stationary by this rod until the pin 24 reaches the opposite end of the slot 23, at which time the pressure of the spring, 17, will be exerted and the cam 21 will throw the arm 22 outwardly, thus moving its connected arm, 37, into engagement with the escapement arm, 38. The parts are held in this position until the swinging lever 41 days only, and only give an alarm once in every twenty-four hours.

From the foregoing description, taken in connection with the accompanying drawings, the constructlon and operation of the invention will be readily understood without requiring a more extended explanation.

Various changes in the form, proportion and the minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantages of the invention as defined in the appended claims.

Having thus described our invention, what we claim as new and desire to secure by Letters-Patent, is:

1. In a device of the class described, a chronometer mechanism comprising in part a gear connected to the hour arbor of said mechanism, an alarm escapement with means for driving the same, an arm thereon, means comprising in part a ear meshing with the hour gear for contro ling said escapement whereby it is operated only once in a day, a spring controlled cam wheel for determining the length of operation of said alarm escapement and means controlled by said cam wheel for contacting with said arm and holding the escapement inoperative.

2. In a device of the class described, a chronometer mechanism, means for driving the same, an alarm escapement with means for driving the same, an arm rigid thereon, means controlled by the chronometer mechanism for controlling said escapement, whereby it is operated once only in a day, a spring controlled cam wheel to determine the length of operation of the alarm escapement and a tripping device operated by the cam wheel to engage said arm to stop the escapement.

3. In a device of the class described, a chronometer mechanism, means for driving the same, an alarm mechanism including an escapement, means for driving the same intermittently for a plurality of days, an arm rigid. on the escapement of said alarm mechanism, a limiting arm connected to the escapement, means controlled by the chronometer for liberating said arm once every twenty-four hours, whereby an alarm is sounded, a spring started cam wheel to determine the length of operation of said alarm mechanism, and a tripping device operated by said cam wheel to engage said arm and hold the escapement.

4. In a device of the class described, the combination with a chronometer mechanism, an alarm escapement, an arm vibrating therewith, means for driving the same intersetting the alarm esca ement to determine mittently for a plurality of days, means for set our hands in the presence of subscribing Witnesses.

WILLIAM DUPEN, SR. WILLIAM DUPEN, JR.

WVitnesses as to the signature of William Dupen, S12:

CHESTER COLE, SAMUEL MELINE.

the time the alarm shal be given, means controlled by the chronometer mechanism and co-acting With the setting means to release the escapement at a predetermined time, said last-named means acting once a day, a spring started cam Wheel to determine the l length of operation of said alarm escapement, and a lever operated by the cam lVitnesses as to the signature of William Wheel for engaging said arm to stop the es- J Dupen, J11: capement. BERTHOLD M. NYE,

In testimony whereof we have hereunto l AUGUSTUS BISHOP.

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