US954381A

US954381A - Engine-stop.

Info

Publication number: US954381A
Application number: US52223809A
Authority: US
Inventors: Charles Dewees
Original assignee: Individual
Current assignee: Individual
Priority date: 1909-10-12
Filing date: 1909-10-12
Publication date: 1910-04-05
Anticipated expiration: 1927-04-05

Description

G. DE'WEES.

ENGINE STOP.

APPLICATION FILED 00T.12, 1909.

Patented Apr. 5, 1910.

$5M emu MUM- wi/imaooeo UNITE STATES PATENT QFFICE.

CHARLES DEWEES, OF BAKERSFIELD, CALIFORNIA.

ENGINE-STOP.

To all whom it may concern:

Be it known that I, CHARLES DEWEns, a citizen of the United States, residing at Bakersfield, in the county of Kern and State of California, have invented certain new and useful Improvements in Engine-Stops, of which the following .is a specification, reference being had to the accompanying drawings.

My invention relates to improvements in mechanism for limiting the speed of engines and particularly pumping engines used in oil-well regions; and an object of my invention is to provide a mechanism of the character described which will be sim ple in construction, comparatively cheap in manufacture and most efficient and reliable in use.

Another object of my invention is to provide an apparatus of the character described which will require a small expenditure of money for its upkeep or maintenance in repair and of which the first cost of installation will be comparatively low.

In the drawings illustrating the principle of my invention and the best mode now known to me of applying that principle, Figure 1 is an elevation showing my new engine-stop mechanism in position upon a pumping engine, so much of the latter belng shown as is necessary to illust'ate my invention; and Figs. 2, 3 and 4: are sections on the lines AA, 'BB and CC of Fig. 1, respectively.

a is the bed, I) is the cylinder and 0 is the fly-wheel of a pumping engine to which my new engine-stop mechanism may be applied. The live steam flows through the steammain cl past the throttle-valve a into the steam-chest Upon the valve-stem g of the throttle-valve e is mounted a wheel it the outer portion of the rim of which is formed with ratchet-teeth 2' and the inner portion of the rim of which is formed with a circumferential groove 7'. In the latter lies a cord is, one end of which is fastened to the wheel h and the other end of which is attached to a weight m. Adapted and designed to engage with the ratchet-teeth z is a pawl or dog it pivoted at 0 upon a post p. The latter is formed with a longitudinal slot 9 and is fastened to the side of the steam-chest f by a screw-bolt 1' which passes through the slot 9, thereby permitting the post p to be so positioned that the dog a Specification of Letters Patent.

Application filed October 12, 1909.

Patented Apr. 5, 1910. Serial No. 522,238.

will operate most efliciently. To one of the spokes s of the fly-wheel c is fastened by bolts 5 a guide-sleeve a formed at its ends with flanges o. Through this guidesleeve u passes the shank or stem 10 of a plunger, the lower end of which is enlarged to form a weight w and the upper end of which is threaded to engage a nut 3 A coil-spring 2 surrounds the upper end of the plunger-stem w and its outer end bears against one of the flanges v, while its inner end bears against a washer 2. The tension of the coil-spring .2 tends to draw the eularged end a' of the plunger against the guide-sleeve a. To the engine-bed (z is suitably fastened a bracket 3 in which is mounted a pivot-pin 4. The latter lies in a plane oblique to the horizontal and upon it is mounted a bell-crank lever 5, one arm 6 of which is p'wotally fastened to the lower end of the sleeve-rod 7. One end of a rod 8 is bent and passes through a hole in the heel 9 of the dog it and is fastened by a cotter-pin 10. The other end of the rod 8 enters the upper end of the sleeve-rod or tubular connecting-rod 7 and is fastened therein by the set-screw 11.-

As the speed of rotation of the flywheel 0 increases, the enlarged end a: of the plung'er moves outwardly against the tension of the coil-spring 2, and when the speed of rotation of the fly-wheel c exceeds a predetermined allowable maximum, the enlarged end a: is moved so far outwardly that it strikes the free end 12 of the bell-crank lever 5, whereby the dog a is tripped and disengaged from the ratchet-teeth '1. The weight m is thereby allowed to fall and the valve-stem g is rotated, cutting off the supply of steam and stopping the engine.

My new engine-stop mechanism will opera te equally well no matter in which direction the fly-wheel 0 may happen to be rotating.

I claim:

1. An engine-stop mechanism consisting of a valve-controlling device; gravity-controlled means for actuating the same; a ratchet-wheel mounted on said device for locking the same; a dog which engages said ratchet-wheel; means for positioning said dog; means for tripping the latter to release said ratchet-wheel and permit said means to actuate said device; a fly-wheel;

and mechanism carried thereby for actuating said tripping means, when the speed of the fly-wheel exceeds a predetermined maximum.

2. An engine-stop mechanism consisting of a valve-controlling device; gravity-controlled means for actuating the same; mechanism for locking said means against operation; tripping mechanism for releasing said locking mechanism; and a two-part connecting device which connects said mechanisms and one part of which telescopes into the other.

3. An engine-stop mechanism consisting of a valve-controlling device; gravity-controlled means for actuating the same; mechanism for locking said means against operation; a fly-wheel spring-controlled plunger mechanism carried thereby; a bell-crank lever one end of which is arranged to be tripped by said plunger mechanism; and a device for connecting the other end of said bell-crank lever and said locking mechanism.

4. An engine-stop mechanism consisting of a valve-controlling mechanism; gravitycontrolled means for actuating thev same; pawl and-ratchet mechanism for locking said means against operation; tripping mechanism for releasing said pawlandratchet mechanism to permit said means to operate; and a two-part connecting device which connects said pawl-and-ratchet mechanism and one part of which telescopes into the other.

5. An engine-stop mechanism consisting of a spring-controlled plunger; a guide for the latter; a valve-stem; a ratchet-wheel mounted thereon; a Weight; a cord one end of which is fastened to said weight and the other end of which is fastened tosaid valvestem ;a dog which engages and thereby locks said ratchetrwheel and valve-stem; a bellcrank lever one endof which. is adapted to be tripped by said plunger; and a two-part connecting device which connects the other end ofsaid; bell-crank lever and dog and one part of which telescopes into the other.

In testimony whereof I hereunto set my hand at said. Bakersfield in the presence 01": the two undersigned witnesses this th day of August, 1909;

CHARLES DE WEES.

Witnesses:

H. S. MINOR; W. W. KAYE.