US284788A - Half to hastings h - Google Patents

Description

(No Model.)

0. 0. WHITE.

PENDULUM ESUAPEMENT. V

No. 284,788. Patented Sepmll, 1883.

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CLARENCE OTIS lVI-HTE, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR OF ONE- HALF TO HASTINGS H. JOHNSON, OF SAME PLACE.

PENDULUM-ESCAPEMENT.

SPECIFICATION forming part of Letters Patent No. 284,788, dated September 11, 1883.

(No model.)

To all whom it may concern Be it known that I, CLARENCE OTIS \VHITE, a citizen of the United States, and a resident of Minneapolis, in the county of Hennepin, in the State of Minnesota, have invented certain new and useful Improvements in Pendulum- Escapements, of which the following specification is a full, clear, and exact description, reference being also had to the accompanying drawings.

This invention relates to the escapements of the pendulunis of clocks, motors, clock-pumps, and similar mechanical apparatus and instruments; and it consists in the construction and arrangement of parts hereinafter shown and described, and then sought to be specifically defined by the claims.

The improvement may be applied to almost any kind of mechanism in which a vibrating pendulum is used; but for the purpose of illustration I have shown it attached to the mechanism for regulating the-stroke of a clockpump in the drawings, in which-* Figure l is a front elevation, and Fig. 2 is a plan View, of the regulating mechanism. .Figs. 3 and 4 are front views of the escapementwheel and a portion of the pendulum, showing the relative positions of the parts at the extreme right and left points of the stroke of the pendulum. Fig. 5 is a perspective view of the pendulum-head detached. Fig. 6 are enlarged detail views of one of the escapement-wheel pins detached.

- A is a frame mounted upon any suitable base in an elevated position, having a horizontal shaft, B, running in suitable bearings in its upper part. 0 is a gear-wheel fast upon this shaft B, and adapted to engage with a train of gears and pinions, G" O C C 0, upon shafts B B 13*. The shaft B has a drum, D, fast upon it, on which a cord, m, is wound, the cord having-a heavy weight (not shown in the drawings) attached to its lower end, and E is a crank upon the outer end of the shaft 13*, connected by a rod, F, to the plunger of a pump, the weight on the cord thus acting as a power to revolve the crank a longer or shorter time, according to the length of the cordm. The gear-wheel O is loose upon the 5o shaft B and is provided with a clutch, G, so that while the wheel is adapted to be revolved by the shaft when moved in one direction it revolves aroundthe shaft loosely when revolved backward, so that the cord m may be wound upon the drum D by a key-wrench 5 placed upon the square head I) of the shaft B H is an escapement-wheel secured to the shaft B, and provided with a series of pins, (1.. a a a a a a a projecting from its outer face near the rim, at equal distances apart and 6( equidistant from the shaft 13".-

K is a pendulum, pivoted at cl to the frame A, and having an enlarged head, K on its upper end above its pivot, and an adjustable weight, K on its lower end.

c is a pallet secured to or formed in one piece with the head K and projecting from the upper edge of the face of the head toward andnearly to the face-of the escapement-wheel H, as shown, and is a little more than one- 7( half as long as the head K is wide, as shown in Figs. '3 and 4. The upper surface, of this pallet is convexly curved concentric with the pivot d, on which the pendulum oscillates. e is another pallet, pivoted at c to the face of the head K leaving a small open space, 0, a little, wider than the width of one of the pins on the escapement-wheel H, between its inner edge and the inner end of the pallet e. The upper surface of the pallet e is somewhat inclined, and is preferably concave, as shown. The lower end of this pallet e is provided with a small slot, 0", through which a 'setscrew is screwed into the head K so that the lower endof this pallet may be adjusted nearer to or farther away from the center of the head K, as hereinafter shown.

A spring may be used in place ofthe weighted cord and drum, or any other suitable power to revolve the wheels, if preferred; or the mech- 9c anism may be applied in any other suitable manner than that shown.

In Fig. 1 the pendulum is shown in a perpendicular position, with the pin a on the escapement-wheel H resting upon the pallet e. The pins will retain this position as long as the pendulum remains stationary, and the escapement-wheel H will also remain stationary when the pendulum is swung to the left, as shown in Fig.. 3, the upper edge of the pallet 1c c merely riding beneath the pin a, and not altering the position of the escapement-wheel H; but as the pendulum returns, when the open space 6* passes beneath the pin a, the weight on the cord m, constantly pulling down, will cause the escapement-wheel H to revolve and cause the pin a to travel down along the inner curved edge of the pallet 6. This will cause the pin a to come around to the upper edge of the head K but before it reaches the head the pin a, acting on the pallet e will swing the head K of the pendulum and more the open space e* over toward the shaft B, so that the pin a will be caught and held by the pallet Then at the next stroke the pin a will fall into the open space 6*, and so on, each stroke of the pendulum permitting the escapement-wheel H to revolve the distance of one of its pins. By this construction only one pin escapes at each double oscillation of the pendulum, and this whatever may be the distance between the pins. By adjusting the pallet e" at its lower end the time of contact of the pins on the escapement-wheel Hwith the face of the pallet will be increased or decreased to i11- crease or decrease the throw of the pendulum, orby adjusting the weight K higher or lower the strokes per minute may be increased or decreased to adapt the device to diiferent uses or kinds of work. As many of the pins may be used upon the escapement-wheel H as desired. The pins of the escapement-wheel H are formed isshown in Fig. 6, which represents an end 1nd side view of the pin detached and enlarged. They are formed with curved surfaces parallel with the escapementwheel, so ;hat they will be in contact with the whole sur- "ace of the pallet 6- while in contact with it to ecure uniformity of wear, and the pins will he made square or polygonal where they pass :hrough the escapement-wheel H, so that they zannot turn therein, and will be secured by a screw and nut, so as to be easily taken out for repairs or to permit the removal of every alternate pin to increase the speed of the escape ment-Wheel H, if desired.

I claim as the principal advantage of this construction of the escapement the superior ability to regulate and govern the speed of gearing operated by Very heavy weights or springs, as the pins on the escapement-wheel ,H bear directly downward upon the pallets,

and the arrangement of the latter is such that any decrease of motion or stoppage will at once throw the pallet 6 over beneath one of the pins 011 the escapement-wheel and stop the machine, and hold it stationary until again set in motion by the operator.

I have found by experiment that a twentyi'our-inch pendulum, K, with a three-pound weight, K, is sufiicient to control a weight of one thousand pounds on the cord m.

Having described my invention and set forth its merits, what I claim is- 1. In a pendulum-escapement, the combination of the pendulum K, having apallet, c, the whole bearingsurface ofwhich is concentric with the pivot of the pendulum, and apallet, e", the whole bearing-surface of which is inclined or eccentric to the pendulum-pivot, with the escapement-wheel H, the pins of which are adapted to be stopped by the concentric pallet and to throw the pendulum by the eccentric pallet, for the purpose herein specified.

2. The combination of a pallet, c, fixed upon the pendulum, and an inclined pallet, 6 adjustable to different inclinations on the pendulum, substantially as and for the purpose herein specified.

In testimony whereof I havehereunto set my hand in presence of two subscribing witnesses.

CLARENCE OTIS \VHITE.

\Vi tn esses I (3. N. VVOODWARD, LoUIs Fnnsnn, Jr.

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