US46652A

US46652A - Improvement in chronometer-escapements

Info

Publication number: US46652A
Authority: US
Publication date: 1865-03-07
Anticipated expiration: 1882-03-07

Description

C. FASOLDT.

Chronbmetr.

No. 46,652; Patented March 7, 1865.

' UNITED STATES PATENT OFFICE.

CHARLES FASOLDT, OF ALBANY, NEW YORK.

IMPROVEMENT IN CH RONOMETER-ESCAPEMENTS.

Specification forming part of Letters Patent No. 46,652, dated March 7, 1865.

To all whom, it may concern.-

Be it known that I, CHARLES FASOLDT, of Albany, in the county of Albany and State of New York, have invented a new and Improved Escapeinent for Ohronometers; and I do hereby declare that the following is a full. clear, and exact description thereof, whirh will enable those skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which Figure 1 represents a plan of this invention. Figs. 2, 3, and 4 show the escapement in various positions, the several parts being illustrated in a larger scale than the previous figure.

Similar letters of reference indicate corre- 1 spondin g parts.

This invention relates to an improvement on an escapement described in Letters latent granted to me February 1, 1859; and the 1 object of this invention is to produce a positive stop of the escape-wheel at either end l of the stroke of the balance, while at thel same time an impulse is given to the bal-l ance by the action of the teeth of the l escapewheel on the end of a lever during one-half the stroke of the balance, the other half of said stroke being completed by the momentum of the balance and by the action of the hair-spring. In order to effect this purpose I use a double escape wheel, a b, or,

or unequal diameter and mounted on the same shaft. In practice the diameter of the i two escapewheels are unequal, as shown in 1 the drawing and described in the Letters; Patent above referred to, and they connect with the main driving-wheel byatrain of; wheels in the usual manner. The teeth ofj the smallescape-wheel, to, act on the lever c l and impart to the balance an impulse during one half of ils stroke, the other half of the stroke being completed by the momentum of the balance and the power of the hair-spring. The teeth of the large cscapewheel I) are caught by the pallets d e, which 1 are broughtinto action at the opposite ends of the stroke of the balaneef. These pal-l lever c at the point when the balance in s completed its rotation, or nearly so, in the direction of the arrows marked on it in Figs. 3 and 4. Fig. 3 shows the lever and pallets in the position which they occupy at the beginning of the rotation of the balance in the direction of said arrows; and Fig. -.l shows them in the position which they oc cupy when the tooth of the small escapewheel is just on the point of clearing the lever c. It the balance returns and rotates in the direction of the arrow marked on it in Fig. 2, the pallet (6 remains in contact with the tooth of the large escape-wheel until the motion of the balance in this direction is nearly completed, and just before the balance begins to return the position of 1 the anchor changes and the pallet 0 drops in front of the tooth of the escape wheel I), thus allowing the escape wheels to turn only avery small distance during that half of the stroke of the balance. At that moment the position of the lever and of the pallets is that shown in Fig 3, and the balance begins to rotate in the direction of the arrow marked thereon in said figure, and as soon as this takes place the pallet e releases the tooth of the wheel I) and the lever c catches in front of the tooth of the wheel (1, thereby imparting an impulse to the balance sufficient f to make up for the loss of motion by friction fand resistance of the air. in other words, two escape-wheels of equal By this arrangement the pallets are siinp'y used as stops, and the friction between them and the teeth of the escape-wheels has no efiect on the motion of the balance or of the watch. If the teeth oftlie escape-wheels wear ott', the motion of the watch is not ali'ected.

No oil is required to make the escapement work smooth, and the injurious effects ot'sucn use are not felt. The watch keeps correct time as well after it has been in use for years as it does when new, .and it is not affected by counter motion or sudden jars.

I claim as new and desire to secure by Letters latent The pallet 0, arranged in combination with 1 the pallet (I, lever 0. wheels a b, and balance f,

in the manner and for the purpose substantially as herein shown and described.

CHARLES FASOLDT.

Witnesses H. P. NUGENT, THOMAS SILsBY.