US735210A - Engine-stop. - Google Patents

Description

PATBNTED AUG. 4, 1903.

J. H. GARY.

ENGINE STOP.

APPLICATION FILED MAY 18. 1.903. N0 MODEL. 2 SHEETS-SHEET l.

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No. 785,210. PATENTED AUG. 4, 1903. J. H. GARY.

ENGINE STGP.

APPLICATION FILED MAY 18, 1903.

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UNITED STATES Patented August 4, 1903.

PATENT OFFICE.

JAMES H. CARY, OF PROVIDENCE, RHODE ISLAND, ASSIGNOR TO THE CONSOLIDATED ENGINE-STOP COMPANY, A CORPORATION OF CON- NECTICUT.

ENGINE-STO P.

SPECIFIGATIQN forming part of Letters Patent No. 785,210, dated August 4, 1903.

Application led May 18, 1903. Serial No. 157,570. (No model.)

T all whom t may concern.-

Be it known that I, JAMES H. CARY, a citizen of the United States, residing at Proviy dence, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Engine-Stops, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention relates to electrically-controlled devices for stopping engines and operation at points remote from the latter.

The primary objects sought are speed of action, a minimum expenditure of electrical energy, and security against accidental'operation of the mechanism.

The ends are attained by means of an electrical tripping device actuating through suitable connections an ordinary balanced valve in the main steam-supply pipe of an engine.

My invention consists inV the construction and arrangement of parts above outlined and hereinafter detailed in connection with the accompanying drawings, wherein- Figure 1 is a front elevation of my novel device connected with a steamsupply pipe, showing diagrammatically the electrical circuit; and Fig. 2, a detailin similar elevation of the tripping device.

Like reference-numerals indicate like parts throughout the views.

An embodiment of my invention is disclosed as applied to the delicately-balanced piston 4 of a supplementary throttle-valve 5, mounted in the steam-pipe 6 of an engine 7. Upon a suitable support 8 or upon a wall near the steam-pipe is mounted a backboard 9, upon which is slidably mounted in suitable guides 10 11 a bar 12, near the extremities of which are xed collars A13 14, provided with screws 15 16. An arm 1S projects from the valve-casing, to which is fulcrumed a lever 19. One end of the Vlatter is connected to link 20 upon the valve-piston 4 and its other end to a connecting-rod 21, pivoted to the inner end of the bar 12. V Chains 22 and 23 are respectively attached to the screws 15 and 16 and pass over pulleys 24 and 25, mounted on the backboard below the bar 12. The chain 22 traverses a bracket 26, which projects from the support 8 and terminates in a coiled spring 27, from which is suspended a weight 28. Depending from the cha-in 23 is a weight 29, lighter than weight 28 and which serves as a handle.

A rectangular iron box 30, traversed by the bar 12, is mounted upon the backboard 9 by screws and has pivoted to its upper portion the armature 31 of a magnet 32, the latter being fixed in the box below the armature upon a stud 6l, projecting from the back of the box. The circuit which includes this magnet consists of the wires 1 2 3, leading to any predetermined locality Where a' key 33 for closing the circuit may be inserted. The circuit is energized by a battery or generator 34.

Pivoted to a block 35 upon the box is a lever 36, whose free end 37 is enlarged and heavy and whose pivoted end is shaped as an eccentric 38. Pins 39 and 40 project from the sides of the shank and head, respectively, of the gravity-lever 36. The latter pin has a preferably fiat under surface to facilitate contact with the end of an upright rod 41, screwed to the top of armature 3l. This rod is laterally tensioned by a spiral spring 42, fixed to the bracket 43 upon the side of the box 30.

A vertical rod44, provided with a fixed sleeve 45 to limit its upward travel, traverses the box 30 and is sustained by a disk or flange 46 upon its upper endresting upon the box-top and in the line of travel of the pin 39 of the gravityflever.

A lever 47 is horizontally mounted upon a pivot 48 in the box 30 and has fixed in its inner end an upright pin 49, adapted to contact with the eccentric 3S when the lever 36 approaches horizontal position. The opposite end of the lever is downwardly tensioned by a spring 50, xed to the box. A chain or cord 58 is attached to the lever 47 at a point near the pin 49 and, passing through the floor of the box, depends near the rod 44.

A second lever 51 is vertically pivoted at 52 to a lug 53, projecting inwardly from the'box 30 and is provided at its lower extremity with a latch 54, adapted to engage a catch '55 upon the bar 12. The last-described lever has its upper end notched to receive the outer or IOO free end of lever 47 and is tensioned midway its length by a spring 56, fixed to the side of the box. A pin 57 also projects inwardly from the side of the box to a point near the upper end of the lever and limits the rearward travel of the latter.

The operation of my mechanism is as follows: Referring to Fig. 2, the parts are shown in set positionthat is, the electrical circuit is open and the steam allowed free passage to the engine. The gravity-lever 36 is suspended and the latch 54 is in engagement with the catch 55. A closing of the circuit by a key 33 eiects a closing of the valve, as follows: The coils 32, being energized, attract the pivoted armature 3l, thereby withdrawing the rod 41 from under the pin 40, which allows the gravity-lever 86 to fall into a horizontal position. This movement of the gravity-lever forcesthe eccentric 38 into contact with the pin 49 and raises the outer end of the horizontal lever 47 from its seat in lever 51. Thereupon the weight 28, through the chain 22 and collar 13, imparts longitudinal pressure upon the rod 12 sufficient to force the catch 55 out of engagement with the latch 54. The outward movement of the rod 12 imparts an inward thrust to the valvepiston'4 through connecting-rod 21, lever 19, and link 20, thereby cutting off the steam.

If desired, the mechanism may be tripped manually by depressing the cord or chain 58.

To reset the mechanism,the rod 44 is pushed upwardly to force the gravity-lever 36 into elevated position, and by pulling the handle 29 downwardly the bar l2 is forced inwardly and the catch 55 thereon is brought into'engagement with the latch 54, whereby the valve is placed in open position. In open position the rod 12 and certain of its connections assume the positions indicated in broken outline in Fig. 1, the weight 28 contacting with the bracket 26. In this position the spring 27 exerts a greater pressure upon the rod 12 than would the weight 28 alone, quickens the closing movement of the valve, and cushions the weight at the close of the latters descent, thus preventing hammering of the valve-seat, jars, or strains of parts.

Having described my invention, what I claim as new, and desire to secure by Letters Pat-ent, is-

l. In an apparatus of the class described, the combination with the throttle-valve, of a tripping mechanism for controlling said throttle-valve, an electrical circuit including a magnet, a pivoted armature in the eld of the magnet, a vertical rod fixed to the armature, a gravity-lever sustained in the elevation by the rod, and adapted to actuate the tripping mechanism in its descent.

2. In an apparatus of the class described, the combination with a valve-piston of a slidable bar mounted adjacent the valve,connect in g-levers between the piston and bar,aweight suspended from the bar adapted to slide the latter, and a latch engaging the bar to normally retain the latter against the tension of the Weight. l

3. In an apparatus of the class described, the combination with a valve-piston of a slidable bar mounted adjacent the piston, connecting-levers intermediate the piston and bar, a weight adapted to slide the bar, a catch upon the bar, a latch engaging the catch, and retaining the bar against the tension exerted thereon by the weight, and a tripping device for forcing the latch out of engagement with the catch.

4. In an apparatus of the class described, the combination with the valve-piston of a slidable bar mounted adjacent the piston, a series of levers connecting the bar and piston, a catch upon the bar, a latch engaging the catch, means for forcing the latch out of engagement, a pulley below the rod, a chain depending from the inner end ot' the rod and passing over the pulley, and a spring and weight supported by the chain for cushioning the thrust of the bar.

5. In an apparatus of the class described, the combination with the valve-piston, of a backboard, a slidable bar mounted to slide upon the board, a series of levers connecting the bar and piston, a latch mounted on the board and engaging the bar, a collar fixed to the bar near its inner end, a pulley mounted on the board below the bar, a chain attached to the collar, and running upon the pulley, and tensioning means upon the end of the chain.

6. In an apparatus of the class described, the combination with the valve -piston of a backboard adapted to carry the actuating mechanism, a slidable bar, guides upon the board for supporting said bar, levers connecting the bar with the valve-piston, a tripping mechanism carried by the board beneath the bar, a chain carried by the inner end of the rod and passing over one pulley, a chain carried by the other end of the rod and passing over the other pulley, a weight upon the end of the first chain, and a handle upon the end of the second chain.

7. In an apparatus of the class described, the combination with a valve-piston, ot' a slidable bar mounted adjacent the valve-piston, a chain of levers connecting the bar with the valve-piston, a tensioning-weight upon the slidable bar, and an electricallyactuated latch normally engaging the slidable bar.

In testimony whereof I have affixed my signature in presence of two witnesses.

JAMES H. CARY.

Witnesses:

HoRATIo E. BELLoWs, WILLIAM E. BROWN.

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