US1041771A - Electric clock. - Google Patents

Description

H. 1?. GAY. ELECTRIC QLOGK.

AESELIGATIGH XILED Kill. 14, 1912.

Patented 0613.22, 1912.

[N VEN T OR Attorney;

W/TJYEiSES H. T. GAY.

ELECTRIC CLOCK.

APPLICATION FILED MAR 14, 1912' 1,041,771 Patented (M122, 1912.

4 SHEETS-BHEET 24 jy'z,

W1 TNESSES INVEZNTOR 4 'f/Mm m Attorney;

H T. GAY.

ELECTRIC CLOCK.

APPLICATION FILED MARJA. 1912.

1,01,77 1 Patented Oct. 22, 1912 WITNESSES 1 UINVENTIOR 3W 4,4

UNITED srnrgps PATENT OFFICE.

HERMAN ll. GAY, (3F BALTIMORE, MARYLAND, ASSIGNOR 0F ONE-HALF T0 JOSEF'H' G. I-IGCHREIN AND ONE-FOURTH '10 JGSFJPH F. CARRQLL, BOTH OF BALTIMORE,

MARYLAND.

m'ncrmc enocx.

Patented Oct. 22, 1912.

To all whom it may concern: I

Be it-known that I, HERMAN T. GAY, of

the city of Baltimore and State out-Maryland, have invented certain Improvements in Electric Clocks, of which the following is a, specification.

In'the description of the present invention which follows, reference is made to the accompanying drawings forming a part hereof and in which Figure 1 is a front View of such parts of the electric clock as are involved in the present invention; and Fig. 2 a sectional side or edge view of the same taken on the broken line '2; in Fig. 1. Fig. 3 is a section taken on the broken line w in Fig. 2. Fig. 4 is a section taken on the broken line to in Fig. 1. Fig. 5 is a section taken on the broken line g in Fig. 2; and Fig. 6 a section taken on the broken line 2 in Fig. 2.

Referring now to the drawings, 1 represents a part of the clock casing to the rear wall of which is fastened the cross bar 2 which carries and electrically unites the ico res of certain electromagnetshereinafter described.

3, 3 are studs which extend forward from the rear wall of the casing 1 and sustain the rear plate a of the clock movement.

5 is the front plate of the clock movement, supported by the posts 7 which extend from the rear plate 4.

9 is the minute arbor journaledin the end of a stud 6 riveted in the plate 4:, and also in the plate 5, as best shown in Fig. 2, and'to which the minute hand (not shown) is secured. The arbor 9 carries the tight main or first gear wheel 10.

112 is a second arbor having the pinion 18 which is in mesh with the gear wheel 10 and is driven by it. ()n the second arbor 12 is also the gear wheel 14 which is in mesh with the pinion 15 on the arbor 17 which carries the escapement wheel 1.9.

20 is the cscapeinent spindle to which the anchor 22 (shown only in Fig. 2) is secured. To the escapcment spindle is fastened the leading rod 24 which in the vibratory motion of the spindle 22, communicates movem ent to the pendulum bar 2-5.

The elements of the clock thus far described are in common use and therefore in themselves embody no invention.

27 1s a ratchet wheel which is loose on the stud 6, with its outer face in contact witha second and larger ratchet wheel 29 which is loose on the first or minute arbor 9.

Motion is communicated from the first to f the second ratchet Wheelb s ring-held pawls 31 (see Fig. 5), and from t'e second ratchet wheel 29 to the minute gear wheel 10 by 33 the ends of which are inserted in those parts, as shown in- Figs. 1, 2 and 6. The ob-,.

ject of the spring connection is to continue the running of the clock, during an interval of time that the motive devices hereinafter described are inoperative.- A backwardirotation of the ratchet wheel by the pawl 34. The employment of' a curved spring similar to the one 33 for the purpose described,.is old in clocks, and I claim no invention therein.

means of the 29 is prevented means of a curved spring 35, 35 are magnets with the center of their cores37 in horizontal alinement with the center of the minute arbor 9; and 39 is an armature in the form of a rocker which is placed loosely on the studfi, and made fast to the ratchet wheel 27 by means of screws, as shown in Figs. 3 and 5.

The tendency of the electromagnets when energized, is to retain the armature (rocker) in a horizontal position, or *with its ends practically in contact with their cores, as shown in Fig. 1; and when the electric circuit is broken therocker offers no resistance to vibration.

4.0 is a coiled spring one end of which? is attached to the plate 4 at 42, and the other end to the rocker at 43, as best shown in 3 of the drawings. The function of the coiled spring 40 is to draw the armature 3,

Il um the foregoing description it will be i the pin 5: striking the upper end of the slo.

understood that the operation of the clock .is produced primarily by the spring 40; and that'the function of the armature 39 is to reextend the spring after its contraction, and placeit in a condition that it will again "serve as a motor,

4:5 is' an insulated stud projecting from the plate 4, upon which is adapted to rotat'e freely the flan ed ratchet wheel 47; and at the rear sis of the said ratchet wheel, and loose upoii the sold stud, is an arm 50 formed of sonic insulating material such for instance as'hard rubber, having a curved slot 52 near its end, as best shown in Figs. 1 and 3.

Within the slot, and free to slide lcngitudinally thereof, is an insulating pin 54 projecting lsterally frorn a link 55 which is pivoted to the inner side of the rocker 39, and near one end thereof. Upon the pin 54 is a loose pawl 57 the point of which engeges the teeth of the ratchet wheel 47. Aspring 60 on the link-55 serves to keep the pawl 57 in engagement with the ratchet teeth of the ratchet wheel for a purpose hereinafter describ d. A portion a of the hard rubber arm 50 entends beyond and is concentric with the circumference of the flange Z) which as before stated, is a part of the ratchet wheel 47. 62 is a spring arm fastened by means of the insulated stud 63 to the rear plate l. the end of which is turned upward on bears with a slight pressure upon either the flange b of the ratchet wheel 48?, or the part coi the arm 50 which as before stated is of insulating material. In. Fig. 1 it is shown as bearing upon the latter.

Supposingthe various parts of the clock movement to he'in the positions indicated in Fig. 1, inwhich the end of the spring arm $2 is shownc as resting upon the part a of 'the hard ruhberarm 50, the electric circuit is open, end the'magnets not energized, the armature 39 is not held in the position shown, but instead, is free to vibrate. Upon the penduluni bein'g swung to one side to start the clock, the contraction of the coiled. spring 40 causes the armature to gradually reach the position shown in Fig, 3, end duo ing its'motion, the operation of the clock movement is continued through the medium of the gearing described.

Upon the armature reachingthe oblique position shown in Fig. 3, the pin 54 strikes the bottom of the slot 52, and the arm 58 is thereby thrown down, and causes the part a of the arm 50 to move around and from under the end of the, spring arm 62, whereupon the end of the spring arm will bear upon the metallic flange 5 of the ratchet wheel a l", and the electric circuit is thereby Closed: The armature is then returned to its orig" p i when. We electric circuit is again broken by 52, and the operation of the clock as above described is repeated.

It will be understood that each time the armature is brou ht to the horizontal position shown in Fig. l, the flange '6 of the ratchet wheel i7 is moved circumferentially a distance equal to the pitch of the ratchetteeth, and the flange thereby presents a dif ferent surface to be drawn across by the end of the spring arm 62, thus reducing to a large extent, oxidation of the points of contact due to sparking,

l have shown and described two spaced electromagnets, the cores of which are on the same horizontal plane as the, minute arbor, a vibratory armature which when in a horizontal position, is in alinement with the cores of the ssidmagnets, end a spring connected to the armature, whose function when the magnets are not energized, is to throw the armature into an inclined position, with one of its ends above, and the other end below a core; and in this operation, through the medium of suitable gearing, the running of the clock is efiected; but it is evident that while two magnets arranged es described are preferred. for the reason that endwise movement of the srmature toward the cores of the ma nets is then equalized, the magnet to the ler't in Fig. 3, could be dispensed with, and the one to the right onl v employed; and I therefore do not limit niyselii to the employment of two electrorriaguets, but use them. in the belief that better results will he attained thereby.

i claim my invention:

1. in combination with the vibratory armature of on electric clock, magnet, a. stud having o rotary disk with ratchet teeth thereon end also s loose vibratory arm of insulating met rial with a portion thereof practicably concentricwith the dish sndpro jecting beyond the circumference of the some, n spring held arm with its fire-e adapted to rest alternately on the and the projecting portion of the insulating ineterisl, the ssid arm, dish: and ma not being in electric circuit, and a link w ich communicotes motion the armature to the vibratory arm, and is provided with. a pawl in engagement with the ratchet teeth of the dish to edect the vibratory motion or the insulating arm from the armature, and thereby produce an intermittent rotary motion of the disk, the object of the devices described being to present a dif- .erentipoint of: contact to the end of the spring arm, at each vibration of the airmature, substantially as, for the purpose specified. 3

2-. in an electric clock, a stud, a metallic electrics lly connected with the stud and adopted to turn thereupon, an arm of insulating .o'iaierial adapted for vibration on '1.

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