US796701A - Electric clock. - Google Patents

Description

PATENTED AUG/8, 1905;

R. GARLS TEDT.

ELECTRIC CLOCK.

APPLICATION FILED SEPT. 1, 1904.

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No. 796,701. PATENTED AUG. 8, 1905. R. CARLSTBDT.

ELECTRIC CLOCK.

APPLICATION FILED snr'r. 1, 1904.

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PATENTED AUG. 8, 1905.

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UNITED STATES PATENT OFFICE.

Specification of Letters Patent.

Patented Aug. 8, 1905.

Application filed September 1, 1904. Serial No. 222,960.

To all whom it may concern:

Be it known that I, RAGNAR OARLsTEDT, a subject of the King of Sweden and Norway, residing in Jersey City, Hudson county, New Jersey, have invented certain new and useful Improvements in Electric Clocks, of which the following is a specification.

This invention relates to the class of electric clocks wherein an electromagnet, with an automatic make-and-break device, actuates the clock mechanism, and especially to that subclass of such clocks wherein the vibrating armature of the electromagnet acts, through a ratchet device, to wind up the spring or weight of the clock.

In accordance with this invention the two coils of the magnet are incased by or inclosed in hollow or tubular columns, and these columns carry the frame and mechanism of the clock. The columns are supported below upon a base which may contain the battery that supplies the magnet.

Other characteristics of the invention will be hereinafter described and the novel features of the invention carefully defined in the claims.

In the accompanying drawings, which illustrate the invention as embodied, Figure 1 is a rear elevation of an electric clock embodying the invention in its preferred form, and Fig.

2 isa vertical section taken substantially at line 00 in Fig. 1. Fig. 3 is an enlarged sectional detail view of one column of the magnet, the plane of the section being at right angles to that seen in Fig. 2. Fig. 4 is an enlarged detail view illustrating the makeand-break device. Figs. 5 and 6 are enlarged views of the clock-spring and winding mechanism.

In the drawings, 1 designates a hollow boxlike base which may be of wood and contain the cells 2, forming the battery for exciting the electromagnet. This magnet has two upright coils 3, wound on cores 4, which extend down into the clock-base and are connected On the core at the respective ends of the coil are iron disks or washers 6. On the upper end of the core is slipped a pole-piece 7 which is bored to receive the core rather snugly, and a screw 8, driven down into the end of the core, serves to draw up the latter. At its lower end the core is secured to the bar 5 by a similar screw 8*. Between 9 and capital 9 has a bearing on the top of the column 9, and the base 9 of the column rests on the clockbase 1, while a reduced portion or tenon 60 thereof occupies a bore or mortise in said base 1. The bar 5 bears'upon the under side of the table portion of the base 1 or on some part thereof. With this construction itwill be seen that when the screws 8 are driven in the magnetwill be drawn up or the pole-pieces driven down, as the case may be, in such a manner as to clamp the respective columns 9 firmly between the pole-pieces and the clockbase 1.

The frame 10, in which the clock mechan ism is mounted, is supported on the polepieces by screws 11. InFigs. 1 and 2, 12 is the dial of the clock, 13 the hands, and 14 the pendulum. These, as well as the clock-train, may be of the usual kind. The means for winding may be explained as far as desirable with especial reference to Figs. 4, 5, and 6.

15 designates thev armature of the magnet, which is pivotally mounted at 16 in the frame. It has a suitable make-and-break device comprising a contact-piece 17 forming one terminal of the magnet-circuit, (the armature forming the other,) and an insulating-piece 18 in the armature, which breaks the contact when the armature is'attracted and rocked by the polepieces. A weight 19 on the armature brings it to the contact position seen in Fig. 4. This make-and-break device forms no essential part of the present application.

The vibrations of the armature imparts a swinging movement to a pawl-arm 20, which carries a pawl 21, that engages the teeth of a ratchet-wheel 22, and thereby winds up at intervals a spring 23, which drives the clock mechanism. It may be stated here that this winding operation is efiected at each time the clock strikes say every hour-the striking devices serving to close the circuit through the magnet. The present invention does not relate to this feature, and it is not shown herein. A device for the purpose may be seen in the United States Patent No. 7 68,421, dated August 23, 1904. Obviously if the clock has no actual strike mechanism it may employ means of a similar character for completing the magnet-circuit at intervalssay every hour.

Although only one of the columns 9 is seen in section in the drawings, this will serve, as both columns, magnetic coils, cores, &c., are alike and both are drawn together firmly by the same means.

In Figs. 1 and 2 a glass inclosing bell 24 is designated somewhat diagrammatically as supported on the base 1; but this forms no part of the invention.

In the construction described the bar 5 and cores 4 may be considered as structurally one part and the columns 9 as clamped endwise between the respective pole-pieces and said bar, where the columns extend down through the table portion of the base and bear on the bar. As the said table portion is embraced between said bar and the base of the column, it is not material, however, whether the column is clamped endwise between the polepiece and the bar 5 or the pole-piece and said table portion of the base.

Having thus described my invention, I claim 1. An electric clock having a base, two hollow columns supported on said base, an electromagnet having its pole-pieces supported on the tops of said columns, the coils of the electromagnet, inclosed in the respective columns, and a frame for the clock mechanism supported on said pole-pieces.

2. An electric clock, having a hollow base, two hollow columns supported on said base, an electromagnet having its pole-pieces supported on the tops of the respective columns and its cores extending down through the columns and connected at their lower ends to the base, the coils of the magnets inclosed within the respective columns, means for securing the column, core and pole-piece firmly to the base, and a frame for the clock mechanism supported on said pole-pieces.

3. An electric clock, having an electromagnet consisting of cores, a bar connecting said cores, coils about the cores, pole-pieces mounted slidably on the ends of the cores, tubular columns inclosing the respective coils of the magnet, and embraced between the respective pole pieces and said connectingbar, and screws driven down into the respective cores through the pole pieces, for drawing the parts firmly together.

4. An electric clock, having an electromagnet comprising two cores, coils thereon, a bar connecting the cores, pole-pieces mounted slidably on the cores, tubular columns inclosing the respective magnet-coils and embraced endwise between the said bar and respective pole-pieces, and screws which clamp the respective columns between the pole-pieces and the bar, and said clock having its frame mounted on said pole-pieces.

In Witness whereof I have hereunto signed my name, this 29th day of August, 1904, in the presence of two subscribing witnesses.

RAGNAR OARLSTEDT.

Witnesses:

HENRY CoNNnTT, HENRY Gr. Hose.

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