US316798A - Hour-hand movement for time-pieces - Google Patents

Description

(No Model.)

J. H. LUFKIN. HHHHHHHHHHHHHHH T POR TIME PIBGB'S.

No.316,798. I Patented Apr. 28, 1885.

TI 1M "y um i UNITED STATES PATENT OEEICEo JOHN HOWARD LUFKIN, OF SPRINGPORT, MICHIGAN.

HOUR-HAND MOVEMENT FOR TIME-PIECES.

SPECIFICATION forming part of Letters Patent No. 316,798, dated April 28, 1885.

Application `tiled November 10, 18S-i.

To all whom, t may concern:

Be it known that I, JOHN HOWARD LUE- KIN, a citizen of the United States, residing at Springport, in the county of Jackson and State of Michigan, have invented a new and useful Improvement in Hour -Hand Movements for Time-Pieces, of which the following is a specification.

My invention is applicable to both clocks and watches, and relates to the movement of the hour-hand. Its object is to have the hourhand point directly to the hour instead of being between the spaces, as is usually the case. The new appliance takes the place of the combination of cog-wheels usually in front and outside of the frame of the inner works, known as hour and minute77 wheels, and is illustrated by the accompanying drawings.

Figure l is a clock-front with the dial out away, showing the parts combined as if in operation; Fig. 2, a curved spring, to one end of whichis fastened asocket, B, which goes onto the center arbor firmly, so that it turns with the minute-hand, and to the other end a short pin, A, extending forward at right angles over the hourwheel and so adjusted as to just clear the outside in passing round; Fig. 3, the hourwheel, which has twelve notches instead of cogs, and is otherwise the same as the common hour-wheel; Fig. 4, a straight spring fastened to the inner frame by a post, O, and bearing on a notch ofthe hour-wheel D.

H, Fig. 2, represents a curved spring. The

position of the spring H is such that the pin A is opposite the minute-hand. As it moves onward it will come against the spring O D,

(No model.)

by means of which it will be pressed downward and into the notch F, carrying with it the hour-wheel, also the hand, so long as the pin remains beneath the spring, or one-twelfth of a revolution. The hour wheel and hand will begin to move when the minute-hand has reached twenty-seven and one-half minutes past, so that when the minute-hand is at halfpast the hour-hand will be midway between the hours7 and when the minute-hand is at twenty -seven and one-'halt' minutes of the hour-hand will stop on the next hour and remain there until the process is repeated.

It may be claimed by some that by the old way the hour-hand, by its position between the hours, helps also to indicate the minutes; but such is not the case. The hour-hand has no more to do with minutes than the minutehand with hours. XVe see by the minute-hand in Fig. l` that it is twenty-five minutes past some hour, then looking at the hour-hand we see that the hour indicated is two.

I claim- A ratchet-wheel secured to the hour-hand arbor of atime-piece, and the spring-arm H, secured to the minute-hand arbor, and having a pin on its free end at an angle thereto, in combination with the spring D, secured to the frame of the time-piece, the said spring and wheel being arranged to move the hourhand at the required intervals, substantially as described.

JOHN HOVAR-D LUFKIN.

Vitnesses:

LAFAYETTE SEAVEY, ABETE A. SEAvEY.

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