Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUSRE909 E
Publication typeGrant
Publication dateFeb 21, 1860
Publication numberUS RE909 E, US RE909E, US-E-RE909, USRE909 E, USRE909E
InventorsE. Sickels
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Improvement in steam engines
US RE909 E
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

4 Sheets-Sheet I. F. E. SICKELS. l

Steam Engine.

neugdfreb. 21g-1860:

N. PETERS1 PMO-mognphr. Wm, RC


Steam Engine.

4 Sheets-Sheet 2.

No. 909. Reissued Feb. 21, 1860.

u. linens. muumpw, waminm n 4"Shets-Sheet 3. F. E. SICKELS. l

Steam Engine.

No. 909. Reissued Feb. 21, 1860.A

lS* I. P' 7 i u es I V nvenff s 4 Sheets-Sheet 4. F.. E. SICKELS.

Steam Engine.

No. 909. l 1 Reissued Feb. 2|, 1860.5

valve at certain pcriods of the stroke.




Specification forming part of Letters Patent No. 4,202, dated September 19, 1845; extended 7 years; Reissue No. 909, dated February 21, 1860.


To all whom it may concern,.-

Be it known that I, FREDERICK ELswoR'rI-I SlCKELs, of the city, county, and State of New York, have invented a new and useful linprovement in Steam-Engines; and 1 do here` by declare that the following is a full', clear, and exact description of the character thereof, which distinguishes it from all other things before known, and of the manner of making and using the same, reference being had to the accompanying drawings, which make a part of this specification.

The nature of my invention consists in liberatin g a weight, spring, or other forceto move a valve to cut ott', by the aid of an independent motion, in combination with a regulating-reservoir, so as to facilitate a rapid closing of the In cutting ott' when the lifter motion is in astate of rest, and using this motion alone to dis. connect the weight, in combination with a reg ulating-reservoir to arrest the momentum, it is necessary to retard the descent ofthe weight and closing of the valve, thus incurring the loss of a slow-closing cut-ott' when it is required to act at certain periods of the stroke, as the weight must be liberated some time before, while there is yet motion on the lifter; but it' an independent motionthat is, a mot'ron not controlled by a lifter-motion, that approaches a state of rest as the piston approaches the middle of the cylinder-is used to aid in liberating a weight, spring, or other force, this loss may be avoided, as the weight or other force can then be liberated at the moment required, and the valve closed rapidly if a regulating-reservoir is used to resist the force and momentum of the rapid-moving parts, and if an adjustable mechanism is used the rapid closing can be maintained at diierent parts of the stroke.

In the accompanying drawings, Sheets 1, 2, and 3, three views are shown of this improvement, in connection with others patented to ine the same day as this, and they will be described in part to facilitate the explanation of the improvement herein patented, notwithstanding it may be used without them.

The same letters refer to the same parts in.

each figure.

or slide valves may be used.

F is a valve rod or stem, having a piston or plunger attached to its upperv end, operating within a reservoir, A, shaped Asmaller at the bottom, which may coniine the iinid contained therein as the plunger descends, substantially in the same manner described in the patent granted to me May 20, 184?, so as to regulate the vele city ofafalling weight connected t0 the stem, that is suiiicient to overcome all friction in closing the valve. To this rod or stem the valve must be attached. Either single, double, A spring, Z, has a catclrpiece, Z, connected toit, that ts into a notch formed by the catch Gr, and extends beyond, which piece Z has a curved projection, S, at the extreme end, against. which the outer face of this arm or wiper Z strikes as it vibrates on its vertical axis. The

outer face of this arm or wiperis parallel with its shaft -or axle, and is of greater length than the motion of the lifter, so that it can act upon the curved projection on the catch-pece Zl axle there is an arm W connected b a rod Y 7 7 y 7 Y, with a similar arm, W, on the upper end of a vertical shaft, Q, which has a spring-arm,

T, at its lower end, (the outer end handle form,)

with its under face provided with a fillet or catch to fall into the teeth on the upper face of the sector l, that vibrates on the axis of the shaft Q, and is held by means ofthe arms U U, that project from two collars that turn one on the lower end of the shaft Q and the other on the upper end of a corresponding shaft, O, below it. From one end of this sector a connecting-rod, R, extends to one arm of a bellcrank, L, the other arm of which is connected by a eonneeting-rod,'N, with the strap M of the eccentric I, and at right angles to the eccentricrod J, that operates the rockshaft U of the lifters A A, so that the sector P and the parts deriving motion from it are moving while the litters are in a state of rest, and thereforethe liberation of the weight to close the valve can be effected when the lifter-motion alone would be inefficient, and y thus obtain a rapid closing of the valve at this part of the stroke, if a regulating reservoir is used to control the momentum. The shaft 0, which is below, has a spring-arm, S,A similar and corresponding to the one, T, betore described, and at its lower end an arm, B,and connectingrod C', corresponding with the arm W and rod Y above, and all lother corresponding parts to work the cut-off valve for this end of the cylinder are substantially the same as the parts above described for the other end of the cylinder. The sector P has a plate, P', above and parallel with it for the purpose of strength and to act as a guard for the springarms S T. The face of the sector P is provided with two sets of teeth, each eX- f tending from the' middle or arms U U to the ends, and the length of each part of the sector is such that the` motion of the springarms S T from one extremityto the other of the sector shall shift the position of the cam or wiper Z and the corresponding one below, so that when the spring-arms are at the outer end of the segment the cams or wipers shall vibrate without permitting the weight to move the valve to cut off, and by moving them toward the middle the extent of the cut-off shall be reduced from the maximum to the minimum-that is to say, to cut off from the greatest to the least portion of the stroke.

It will be evident from the foregoing that anymotion derived from any part of the engine may be substituted for the motion of the arms or Wipers, provided it has motion as y distinguished from the lifter motion-as, for instance, instead of the horizontal vibratory motion of the arms or Wipers, the time when the Weight may be permitted to act to close the cut-oi valve may be regulated by a vertical descending motion as the lifter rises, and

in thisl case it will be by the cooperation of this independent motion with another motion that the liberation of the weight will be effected.

Other forms of adjustable mechanism than that here shown may be used for the independent motion; or all may be dispensed with in the use of this invention.

Other mechanism than the trip and catch can be used to transfer the weight from the mechanism that lifts it to a regulating-reservoir, that may be of any suitable form or kind to control the momentum; but the transfer mechanism should be placed asnear the valve as practicable, so as to have as little friction as possible in the liberated parts to encounter in rapidly closing the valve, with a regulatingreservoir properly constructed to control the momentum of the rapidly-moving parts.

Sheet No. 4 shows the elevation of parts before described, (it being understood that the form and arrangementl of them Will depend in each case, as in this, upon the general arrangement of the valvegear,) and to Which attention is particularly required in order to understand this invention.

A is the regulatingreservoir.

Zll is the catch-piece.

Z is the Wiper, moved= by an independent motion. 1

F is the valve rod or stem to which ythe weight and valve are attached.

What I claim as new, and desire to secure by Letters Patent, s-

Liberating the closing Weight or apparatus to cut o' by the aid of an independent motion, in combination with a regulating-reservoir to resist the force and momentum of the rapidly# moving parts in cutting oi'.