US349878A

US349878A - Clock

Info

Publication number: US349878A
Authority: US
Publication date: 1886-09-28
Anticipated expiration: 1903-09-28

Description

{No Model.)

D. T. GARCIA.

CLOCK.

No. 349,878. Patented Sept. 28, 1886.

WITNESSES IN'VBNTOR M, Jmwb 4 J BY VUuM ATTORNEYS;

UNITED STATES PATENT OEEicE.

DOMINGO TORRES GARCIA, OF G'UADALAJARA, MEXICO.

CLOCK.

SPECIFICATION forming part of Letters Patent No. 349,878, dated September 28, 1886.

Application filed February 13, 1886. Serial No. 191,806. (No model.)

To all whom it may concern:

Be it known that I, DOMINGO ToRREs GAR- CIA, of Guadalajara, Mexico, have invented a new and Improved Differential Clock, of which the following is a full, clear, and eXact description.

The object of my invention is to provide a new and improved clock or time-keeping mechanism, which is constructed with very few parts, indicates the time very accurately, and is not apt to get out of order.

The invention consists in the construction and combination of parts and details, as will be fully described and set forth hereinafter, and pointed out particularly in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure l is a face View of the mechanism of my improved clock, the outer fixed dial or ring and the outer toothed wheel being removed. Fig. 2 is a cross-sectional view of the complete mechanism, and Fig. 3 is a face view of the same.

The construction of the clock is based upon the principle ofdifferential gearing, which has been applied in the manner to be described.

Theanchor escapement orpalletAis mounted on the shaft A, pivoted in the frame B of the clock in the usual manner, and provided with a downwardly-projecting arm, 0, forked at its lower end at O, to receive the pendulumrod D, which is provided at its lower end with an ordinary adjustable bob or weight, D. The pendulum-rod D, which may be of any preferred style, material, or construction, is suspended from a pivot mounted in a bearing, D attached to the frame of the clock; or it may be hung in any other suitable manner. On a spindle or arbor, E, journaled in a suitable hearing attached to the frame of the clock, is mounteda pinion, F, which engages with a cogwheel, G, journaled in suitable supports and carrying a drum or barrel, H, and on the drum a cord, wire, or cat-gut, J, is secured, having a weight, K, attached to its free end. All these parts are of ordinary construction, and it is evident that an ordinary cloclrspring may be used in lieu of the weight and cord.

On the spindle or arbor E the two toothed wheels L and M are mounted, the innerwheel, L, being mounted rigidly, and the outer wheel, M, being provided with a sleeve mounted ratherloosely on the spindle E, and both wheels L and M are engaged by the anchor or pallet A. The inner wheel, L, is provided with a few less teeth than the wheel M, as and for the purpose hereinafter described, and on the face of the inner wheel, L, is produced a circular scale divided into twelve equal parts, and each of said divisions is subdivided into twelve equal parts, so that the inner wheel, L, is dividedinto one hundred and forty-four parts,the twelve larger divisions representing the twelve hours, and each hour being divided into twelve parts, each of which represents five minutes. The outer wheel, M, is cut out and provided with spokes, so as to permit inspection of the face of the inner wheel, L, and is also provided with a pointer, T, which moves over the circular scale on the inner wheel, L. The outer wheel, M, is also provided on its periphery with a circular scale divided into five parts, each indicating a minute, and each in turn subdivided into sixty parts, making three hundred divisions in all.

WVith the division on the outer wheel, M, a pointer or index, R, is arranged to register, said pointer being formed or provided on the inner edge of the circular ring S, attached to the frame of the clock and surrounding the outer wheel, M, though placed slightly outward from the same.

The operation is as follows: The weight K, acting on the drum, causes the revolution of the cog-wheel G, whereby the pinion F and its spindle or arbor E are revolved, carrying with them the inner toothed wheel, L, the rotation of which is controlled by the anchorpallet A. The action of the toothed wheel L on the pallet A causes a swinging of the pendulum, and at each beat of the same a tooth of each toothed wheel L and M is released. Let us suppose that the inner wheel, L, has two hundred and eighty-eight teeth and the outer wheel, M, two hundred and ninety teeth. Then, by the time the wheel L has made a revolution M will have completed its revolution less twoteetluor four beats. Then, if, for example, the pendulum is adjusted to make two oscillations, or two beats of the pendulum, in

' thirty twenty-ninths of a second, the outer wheel will makea complete revolution in thirty twentyninths times two hundred and ninety, or three hundred seconds, or five minutes, as will be indicated by its change of position with respect to the fixed pointer R. The inner wheel, L, will complete a revolution in thirty twenty-ninths times two hundred and eightyeight seconds, or one hundred and forty-four twenty-ninths minutes. At the end" of one hour from twelve oclock the wheel M will have made twelve revolutions, while the wheel L will have made twelve one-twelfths revolutions, so that the pointer T on the wheel M will point to l on the wheel L, thus indicating one oclock, and so on. The five-minute fractions ofthe hour will also be indicated by the pointer T pointing to the small divisions on the wheel The minutes and seconds will be indicated 7 by the fixed pointer R pointing to the divisions on the scale on the outer wheel, M. Many other combinations of numbers may be used with equal advantage.

By the differential mechanism the long divisions of time are accurately indicated without the use of the usual multiplyingt-rain.

I herein shown and described.

2. The combination,with a clock mechanism, of two toothed wheels, of which one has one or more teeth more than the other, and of an escapement anchor lever or pallet engaging with the teeth of both wheels, the Wheel having the smaller number of teeth being mounted rigidly on a spindle or arbor, and the wheel having thelarger number of teeth being mounted loosely on said spindle or arbor, substan- 5o tially as herein shown and described.

3. The combination, with a cog-wheel, of a weight and cord or spring for revolving the same, a pinion engaging with said cog-wheel and mounted on a shaft, two toothed wheels, one of which is mounted rigidly and the other loosely on the pinion-shaft, the loose wheel having one or more teeth morein its rim than the fixed wheel, and of an escapement anchor lever or pallet engaging with the teeth of both wheels, substantially as herein shown and described. 4. The combination, with a clock work mechanism, of two toothed wheels mounted on the same shaft, one being fixed and the other loose, the fixed wheel having less teeth than the loose wheel, and an escapement anchor pallet or lever engaging with both wheels, the loose escapement'wheel having part of its face cut out and a circularscale formed around the opening, and the fixed wheel with the smaller number of teeth having a circular scale produced on its face, substantially as herein shown and described.

5. The combination, with a clock -.work mechanism, of two toothed wheels mounted on the same shaft, one being fixed and the other loose, the fixed wheel having fewer teeth than the loose wheel, an esoapement pallet anchor or lever engaging the teeth of both wheels, the front loose wheel provided with the larger number of teeth having part of its face cutout to form an opening through which the rear wheel having the smaller number of teeth shows, a pointer formed on the front loose wheel having the larger number of teeth and projecting over a scale on the face of the inner fixed wheel having the smaller number of teeth, and ofa casing or frame havingapointerprojecting over the scale formed on the face 90 of the front loose wheel with the larger number ofteeth, substantially as herein shown and described.

DOMINGO TORRES GARCIA.

WVitnesses:

N IOOLEIS PUGA, ANTONIO ARRONIZ.