US901737A - Alarm-clock. - Google Patents

Description

W. E. PORTER.

ALARM CLOCK. APPLICATION FILED JUNE 8, 1908.

Patented Oct. 20, 1908.

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ALARM CLOCK.

APPLIOATIONYFILBD JUNE 8, 1908.

901,737. I Patented 0011.20, 1908.

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WILSON E. PORTER,

OF NEW HAVEN, CONNECTICUT, ASSIGNOR TO NEW HAVEN CLOCK 00.,

OF NEW HAVEN, CONNECTICUT, A CORPORATION.

ALARM-CLOCK.

$pecification of Letters Patent.

Patented Oct. 20, 1908.

Application filed June 8, 1908. Serial No. 437,342.

To all whom it may concern:

Be it known that I, WILSON E. PORTER, a citizen of the United States, residing at New Haven, in the county of New Haven and State of Connecticut, have invented a new and useful Improvement in Alarm-Clocks; and I do hereby declare the following, when taken in connection with the accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specification, and represent, iii-- 7 Figure 1 a view in front elevation of the time-dial of an alarm-clock constructed in accordance with my invention, and showing the concentric arrangement therewith of the alarm hand or pointer. Fig. 2 a view of the clock in front elevation with the dial removed, but showing its three concentric pointers. Fig. 3 a view thereof in vertical section with the pointers arranged in line. Fig. 4 a view in vertical transverse section looking forward toward the rear face of the front movement-plate. Fig. 5 a detached plan view of the alarm spring and the combined lifting-cam and warning pin carried by it, a lifting-lever coacting with the said cam, and the warning-finger coacting with the said pin being also shown in this figure in section. Fig. 6 a detached perspective view of the locking-lever. Fig. 7 a detached view of the alarm-sustaining cam and oscillating shutter. Fig. 8 a detached view of the alarm-sustaining cam. Fig. 9 a detached view of the alarm-sustaining shutter.

This invention relates to an improvement in alarm clocks of that class which, although providing for setting the alarm on a twelve hour dial, are constructed so that the alarm is sounded only once in twenty-four hours, the object of my present invention being to provide a simple, convenient and reliable alarm clock having an alarm hand or pointer arranged concentrically with the time-dial which is used in setting the alarm in place of the special alarm dial commonly used.

With these ends in view my invention consists in an alarm clock having certain details of construction and combinations of parts as will be hereinafter described and pointed out in the claims.

In carrying out my invention as herein shown, I employ an alarm hand or pointer 2 arranged concentrically with the time-dial 3 upon the 0f the clock and frictionally mounted upon an alarm-setting pinion 4 turning loosely hour hand socket 5 upon which an hour hand 6 is frictionally mounted, the minute hand 7 being applied to the projecting outer end of the center shaft 8 the projecting rear end of which is furnished with a knurled finger-button 9. The pinion 4 aforesaid is meshed into and turned by an alarmsetting wheel 10 fixed upon the projecting forward end of an alarm-setting shaft 11 furnished at its projecting rear end with a knurled finger-button 12 and at its forward end with a collet 13 formed with a cog-like let-0H tooth 14 coacting'with an alarm cam 15 mounted upon the forward face of an alarm-wheel 16 turning upon the alarm shaft 11 on which it has longitudinal movement and meshing into an alarm pinion 17 rigid with the hour hand socket 5 and therefore making a revolution once in twelve hours. As there are twice as many teeth in the alarm wheel 16 as in the alarm pinion 17, the alarm cam 15 completes a revolution only once in twenty-four hours.

The action of the cam 15 which is driven by the time-train of the movement, upon the tooth 14 of the alarm collet 13, causes the alarm wheel 16 to be moved from front to rear upon the shaft 11 against thetension of an alarm spring 18 secured to the front face of the front movement plate 19, the said spring carrying a plate 20 having a perforation 21 through which the alarm shaft 11 passes. The said plate 20 carries a conical lifting-cam 22 terminating in a concentric warning-pin 23. The said cam 22 operates a lifting-lever 24 hung at its -upper end from a stud 25 in the front movement plate 19 and engaging at its lower end with a lug 26 upon the lifting arm 27 of a locking-lever 28 having a hub 29 by means of which it is mounted upon a stud 30 in the front movementplate. A spring 31 engaging with the arm 27 exerts a constant effort to keep the said lug 26 in engagement with the adjacent edge of the lifting lever 24. The said lever 28 also has an upwardly extending stop-arm 32 having an inwardly turned stop-finger 33 co-acting with a stop-h0ok 34 mounted upon the forward end of the oscillating verge-arbor 35 carrying the verge 36, the bell-hammer 37 and the shut-off wire 38 and forming a part of the alarm-train which is of ordinary con. struction and need not therefore be pariicularly described. The verge-arbor 35 also carries a warning-arm 39 extending downward into position to coact with the warning pin 23 before mentioned. The said lockinglever 28 is further provided with an alarmsustaining arm 40 having a finger 41 riding upon the edge of an alarm-sustaining disk 42 rigidly connected by small posts 43 to the main or first wheel 44 of the alarm train, and formed with a stop-notch 45 normally closed by means of an oscillating shutter 46 interposed. between the said disk 42 and a collet 47 secured thereto. A spring 48 exerting a constant effort tohold the shutter in the position in which it closes the stop-notch 45, is attached at one end: to a screw 49 carried by the shutter, and at its opposite end to a flat stop-finger 50 set radially into the disk 42 and entering a stop notch 51 therein, the opposite walls of thesaid notch engaging with the opposite faces of the finger 50 to limit the oscillation of the shutter which projects just enough beyond the edge of the disk 42 for engagement by the finger 41 of the alarmsustaining arm 40.

The operation of my improved clock is as follows:-The alarm is set to go off as desired by means of the finger-button 9 which is turned to swee the alarm hand 2 clockwise over the dial The alarm having been set, the operation of the tin1e-train will effect the rotation and consequent rearward movement of the alarm-wheel 16, whereby the conical lifting-cam 22 will be slowly pushed rearward with the effect of slowly operating the lifting-lever 24 which will in turn slowly turn the lockingdever 28 upon its stud 30. As the lever 28 is swung upon its stud 30, the stop-finger of its stop-arm 32 will be moved out from under the stop hook 34 car-v ried by the verge-arbor the hook 34' to drop, but the alarm-train is not let-off because as the hook 34 drops, the warning-fin er 39 is brought into engagement with the warning pin 23 at the end of the cam 22. The continued action of the cam 22 against the lever 24 now lifts the finger 41 of the alarm-sustaining arm 40 out of the stop notch 45 in the disk 42 and permits the spring 48 to act to oscillate the shutter 46 so as to close the stop notch 45. Now when the drop of the alarm-cam 15 is brought into re istration with the tooth 14 of the let-off coIlet 13, the spring 18 acts to ush the alarmwheel 16 forward 011 the a arm-shaft 11, whereby the warning-pin 23 is moved forward and disengaged from the lower end of the warning finger 39. This permits the alarm-train to start. Although at this moment the finger 41 of the alarm-sustaining arm 40 is located directly over the stopnotch 45 in the disk 42, it is prevented from entering the said notch by the shutter 48. The arm 41 therefore rides,so to speak, upon the projecting end of the shutter and upon 35. This permits the edge of the disk until the disk has made one complete revolution. Just before that the arm will engage with the adjacent edge of the projecting end of the shutter whereby the shutter wil l he held against rotation with the disk, but the disk continuing to revolve, will gradually bring its stop-notch 45 into regis tration with the edge of the finger 41 which will drop into the notch 45 just as the disk completes its revolution. It will now be understood that the disk 42 sustains the sounding of the alarm during one revolution of the disk, and hence one revolution. of the main wheel 44 of the alarm-train.

I claim 1. In an alarm clock, the combination with a twelve-hour time-dial which is utilized for setting the alarm, of an alarm-hand arranged concentrically with the said twelve -hour time-dial, means located. at one side of the center of the said dial and operated by the time mechanism of the clock for releasing the alarm-mechimism of the clock once in twentyfour hours, and an alarm-setting mechanism also located at one side of the center of the dial and geared to the said alarm-hand.

2. In an alarm clock, the combination with a twelve-hour time-dial whichis utilized for setting the alarm, of an alarmehand arranged concentrically with the said twelve-hour time-dial, a center shaft, an alarm-setting shaft located at one side of the said center shaft and geared to the said alarm-hand for sweeping the same over the dial, and a twentyfour hour alarm-wheel turning upon the said alarm-setting shaft and rotated once in twenty-four hours by the tii'ne-mechanism of the clock.

3. In an alarm clock, the combination with a twelve-hour time-dial which is utilized for, setting the alarm, of a center shaft, an hourhand socket located tl'iereupon, an alarmsetting pinion turning loosely upon the said socket, an alarn1-hand carried by the said pinion for sweeping the time dial, an alarmsetting shaft located at one side of the said center shaft, an alarm-setting wheel mounted upon the said alarm-setting shaft and meshing into the said alarm-setting pinion, an alarm-wheel turning loosely upon the alarmsetting shaft and rotated once in twenty-four hours by the time-mechanism of the clock, and means coacting with the said alarmwheel for letting off the alarm train once in twenty-four hours.

4. In an alarm clock, the combination with the time-dial and center shaft thereof, of an. alarm-setting pinion axially mounted with respect to the center shaft, an alarm hand carried by thesaid alarm-setting pinion, an alarm-setting shaft, an alarm-settingwheel carried thereby and meshing into the said alarm-setting pinion, an alarm-wheel turning upon the alarm-setting shaft, and rotated once in twenty-four hours by the time-train,

an alarm-cam rotating with the said alarm- I an alarm sustaining mechanism coacting wheel, an alarm spring ooacting with the said alarm-wheel for moving the same longitudinally upon the alarm-setting shaft, a combined lifting-cam and warning pin carried by the said spring, a lifting lever coacting with the said cam, a locking lever oper ated by the lifting lever, a stop hook coacting with the locking lever, a warning finger co- 10 acting with the warning-pin aforesaid, and

with the said locking-lever for sustaining the sounding of the alarm.

In testimony whereof, I have signed this specification in the presence of two sub- 15 scribing witnesses.

, WILSON E. PORTER. Witnesses:

CLARA L. WEED, v FREDERIO O. EARLE.

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