US762249A - Safety stop device for stationary steam-engines. - Google Patents

Description

No. 762,249. PATENTED JUNE 7, 1904. I

C. A. OT'I'. SAFETY STOP DEVICE FOR STATIONARY STEAM ENGINES.

APPLICATION FILED 0UT.31. 1903- NO MODEL.

I'IIUNHINWII c m z"@/ I 7L I Z I h ITNESSEEI. /N\/ENTURI 11 ff, 1 I Chaflela A. O.

.1111: Ndla s Prrzns m moruumm. wAsHmu'wN. a. c

UNITED STATES Patented June 7, 1904.

PATENT OFFICE.

CHARLES A. OTT, OF LINCOLN, RHODE ISLAND.

SPECIFICATION forming part of Letters Patent No. 762,249, dated June '7, 1904.

Application filed October 31, 1903- To a. whom it may concern:

Lincoln, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Safety Stop Devices for Stationary Steam-Engines, of which the following is a specification.

This invention relates to an electrically-actuated valve mechanism adapted to control the steam in a stationary steam-engine; and the object of myinvention is to provide an effective device which can be operated upon'to instantly shut oif the steam from the engine in case of accident in any part of the works.

My invention consists in a spring-controlled valve properly mounted and interposed between the throttleevalvc and the steam-inlet pipe of the engine, electrically-actuated means for releasing said spring-controlled valve to close upon its seat, and means for relieving the steam-pressure upon said spring controlled valve that the same may be moved to its electrically-operated position, of the novel construction and combination of parts, as herein after described, and specifically set forth in the claim.

In the accompanying sheet of drawings, Figure 1 represents a side elevation of my electrically-actuated valve as applied to the throttle-valve and steam-inlet pipe of the engine. Fig. 2 is an enlarged central longitudinal sectional view showing the throttlevalve, spring-controlled valve, andsteam-inlet pipe, respectively, and said valves open as when the engine is in operation. Fig. 3 is a vertical cross-sectional view taken in line X X of Fig. 2, showing the electrically-actuated mechanism for holding the spring-controlled valve open, as when the engine is running. Fig. 4 is a similar sectional View showing the relative position of parts of the device as when the releasing mechanism has been tripped electrically and the spring has closed the Valve upon its seat and shutting off the steam from the engine. Fig. 5 is a top plan View of the casing for the spring-controlled valve and showing a by-pass adapted to relieve the pressure of steam against said valve Serial No. 179,398. (NO 1110681.

when the same is to be opened and held to its normal position.

Like letters of reference indicate corresponding parts in the different views of the drawings.

Referring to Fig. 2, A represents a tubular casing which is divided by a partition 7), so as to provide two steam-chambers c and c.

Said partition is provided with a circular beveled opening (Z, communicating with the chambers of the casing and forming a seat against which a valve-disk c rests in closing the said opening. The valve-disk c is rigidly secured upon a rod 0, that projects vertically from the casing, and the lower portion of said rod beneath the said valve-disk eisrnounted and movable in astep f, that is secured in the annular flange Z) integral of the casing. A push-spring f surrounds the rod 6' and isinterposed between the said valve-disk c and said step f. g is a packing-ring interposed between the step f and the annular flange b of the casing, and a suitable stuffing-box g surrounds the upper portion of the valve-rod a, said stuffing-box being secured upon a projecting annular flange of the casing. The casing A has an integral upward extension 5 at one side thereof, and the upper extremity of said extension is bifurcated to receive the end of a swinging arm 7b, which is connected to the bifurcated end of the said extension by a pin ll. The upper end of the valve-rod a is bifurcated to receive the arm A, and a pin 7L rigid in the bifurcated end of the valve-rod, loosely enters an elongated slot [2, formed in the said arm h, as shown in 3. At the opposite side of the casing A and integral therewith is another upward extension 6 whose upper extremity has a fixed stud bflupon which is loosely mounted a latch-lever 2'. Said lever has a tongue projection 71 at its upper end to engage upon the end of the arm [2 in holding the valve-disk 0 open or in its normal position, as seen in Fig. 3. b is an outer extension integral of the casing A and arranged to support the electromagnets 'j. k is a lever having an armature to contact with the amatures of the magnets j j, and this armature-lever It has a tongue is to engage a hook formed on the lower end of the latch-lever i. This valvecasing A, with the tripping mechanism for actuating its valve,-as described, -is adapted to be interposed between the casing Z of the ordinary throttle-valve of a stationary steamengine and the steam-inlet pipe 021, said valvecasing A being fixedly secured in position by bolts 71. 72 which enter through an outer annular flange integral at each end of the said valve-casing A and through the corresponding annular flange of the throttle-valve casing Z and steam-pipe m, respectively, in the manner as shown in Fig. 2.

Referring to Fig. 1, 0 represents an electric push-button fixedly secured in a wall of the factory or works, and this button has the usual armature from which a wire (1 leads to the positive pole of a storage battery q, and from the negative pole of the battery a Wireq leads to one of the electrically-connected magnetsj. From the other electromagnet a wire (1 leads back to the armature of the push-button 0. When the throttle-valve Z and valve 0 are open, as shown in Fig. 2, the steam passes through-from the inlet-pipe m in the arrow-direction to the steam-chest of the engine, and as the engine is running the parts which hold the valve 6 open are in'the position as shown in Fig. 3. Now if perchance an accident should happen in some part of the factory or works remote from the engine-roorn as should require the stoppage of the engine, by simply pressing on the push-button 0 causes the electromagnets jy' to attract the armature of the lever K:, which when carried down by the magnets disengages itself from the hook of the latchlever 2'. A pull-spring s, whoseends are connected to the casingAandlatch-leveri, draws back the latter from engagement with the arm 71, and at this moment the push-spring f instantly forces the valve 0 upon its seat 0 to the position of parts as indicated in Fig. 4, thus shutting off the steam from throttlevalve and causing the engine to cease running.

Any number of pushbuttons may be 10- cated at convenient intervals .in the factory and connected with the device, and by havmg a spring-pressed valve intermediate of the samemay be forced back and held in its normal position, as indicated in Fig. 3, I provide a by-pass t, which communicates with the chambers 0 and 0 of the casing, as seen in Figs. 2 and 5, and said by-pass has a valve a for the engineer to close after the valve 0 has been adjusted to its open position.

Having described my invention, what I claim, and desire to secure by Letters Patent,

In a safety-stop for stationary steam-engines having a steam-inlet pipe and athrottle-valve, the combination, of a device comprising a fixed tubular casingcommunicating with said inlet-pipe and said throttle-valve and divided by a partition having a port; a by-pass communicating with the said casing at each side of its partition; a movable rod projecting from said casing,andcarryinga valve-disk arranged to close the port in the same; a push-spring interposed between said valve-disk and the said casing; an arm pivoted on an extension of the casing, and connected to the valve-rod of the same; a latchlever pivoted on a support of the casing and having a hook at oneend and a lugatits-opposite end thereof to engage the free end of said arm; a pull-spring from .the hook portionof said latch-lever-to said casing; a lever pivoted on a support of the casing and provided with an armature arranged .at one end and-a tongue at its'opposite end thereof to engage the hook of said latch-lever; electromagnets arranged to attract the armature of said lever, and a push-button electrically wired to said magnets, substantiallyas shown and .for the purpose specified.

In testimony whereof I aifix'my signature in the presence of two witnesses.

CHARLES A. OTT. IVitnesses:

WILLIAM H. PECK, FRANK I. SHERMAN.

Images