US273512A - g-rudelbach - Google Patents

Description

(No Model.)

J'zyz.

6:: A q:3 WITNESSES? N. PEYERS. Fhnlwlilhagraphor. Wanhinghm. D. c.

P. GRUDELBACH.

GUT-OFF VALVE GE AR.

Patented Mar.6,188'3.

2 SheetsSheet 1.

1 NVENTOR d7"; ZeZZMA ATTORNEYS (No Model.) 2 Sheets-Sheet 2.

P. GRUDELBAGH' GUT-OFF VALVE GEAR.

No. 273,512. Patented Mar.6,1883.

Y INVENTOR Pauz d7 BY I WITNESSES:

ATTORNEYS 7 UNITED STATES PATEN OF-FICEQ PAUL GRUDELBAOH, OF BERLIN, ASSIGNOR TO SOHAEFFER 85 BUDENBERG, OF BUOKAU, NEAR MAGDEBURG, GERMANY.

CUT-,OFF-VALVE GEAR.

SPECIFICATION forming part of Letters Patent No. 273,512,.dated March 6, I883.

' Application filed December 21, 1882. (No model.)

To all whom it may concern:

Be it known that I, PAUL GRiiDELBAoH, a subject of the Kingdom of Prussia, German Empire, residing at Berlin, Prussia, have invented a new and useful Improvement in Out- OfflValve Gear, of which the following is a specification.

This invention relates to agovernor, theregulation or governing being accomplished by a 10 cut-ofi' automatically set by the governor, and the apparatus operates in such a manner that at the beginning of the stroke the steam is allowed to flow into the valve-chest with full pressure, and it is cut off sooner or later, according to the lower or higher position of the regulator. The operation of the governor is thus similar to that in steam-engines with ate tomatically-changing cut-oil", excepting in regard tothe fact that the steam in the valvechest has partially to expand twice for each revolution of the machine.

The construction in which this apparatus chiefly differs from other apparatuses tor the same purpose is shown in the accompanying drawings, in which- Figure 1 isa vertical central section. Fig. 2 is a plan view, partly in section. Fig. 3 is an end view, in section, of the valve. Fig. at is an enlarged view of part of Fig.1. Fig. 5 is 0 an end View, enlarged, of part of the apparatus.

Similar letters indicate corresponding parts.

The steam flows from the boiler. through the casing A into the valve-chest either in the diiectiou from a to b or from b to a.

5 B is an oscillatory rotary valve, which is mounted on a spindle, 8. Upon this spindle s is firmly keyed or mounted a segment, S, against which strike spring arms or levers .r 00. These levers w 00 each consist of two branches, one of which strikes against a fixed part of the machine, thus limiting the motion in one direction. The other branch is caused to strike against the segment S by means of a spring or weight, thus holding the segment S, and 4 5 consequently the valve B,in a certain position, and the valve is closed. In the view shown in the drawingszcoiled springs are shown mounted on the brackets on which the pivots about which the levers or w oscillate are formed, and one end of each spring catches into a slot in one branch of the levers a0 00, thus throwing one branch of each lever against the segment S.

The letter Z represents a bar or lever,which is in connection with the eccentric or other part of the machine, so that an oscillating motion is imparted to it, which is communicated to the shaft to. This shaft to is provided with a recess or shoulder, in which the end of spindie 8 rests, but so that said spindle s can'turn independently of the shaft to. On the shaft 20 is firmly keyed or mounted a bracket, '1, on which are pivots about which the arms It It oscillate. These arms k 76 are held in contact with the segment S by springs or weights. In

the view shown in the drawings coiled springs are shown to keep the arms k in contact with the segment S, s aid springs being applied in the same manner as the coiled springs in connection with the levers .1: w. When the lever Z receives an oscillating motion from the ec- 7o centric this motion is communicated through the arms k kand segment S to the valve B, the parts being so combined that the valve is opened each time when the crank is on the line of dead-center-that is, twice in one revo 7 5 lotion. The connection between the lever Z and the valve B, as is seen, is not fixed; but the movement of the latter is indirectly, through the segment S and arms k k, dependent-upon the eccentric. The segment S and arms 70 k serve to make the period ofcutting off the steam dependent upon the position of the governor, as presently described. On the shaft to, turning freely in the support I, is firmly mounted the bracket '1, with the arms k k, as already described. On the spindle s the segment S is firmly mounted, said segment having shoulders z 2. As the arms k k are pressed onto the segment S the lever Z comes into firm connection with the spindle .9, imparting its oscillations, through shaft to, arms k k, shoulders z 2, segment S, and spindle s,

to the valve B; but this connection lasts for each oscillation of lever Z only so long as the. respective arm 70 or it. is in gear with segment 5 S. The putting out of gear of these arms k It depends on the position of the lever H, lying between the arms is k, and the position of which is higher or lower, according to the movement of the governor. The governor, be-

ing of any well-known construction, (weights which are caused to fly out by centrifugal force thus causing the arm 'of the lever H between the arms 70 It to descend,) receives motion in the ordinary way. According as the governor mounts higher or sinks lower, the arms It It come into contact sooner or later with the lever H, and the steam is accordingly cut olf sooner or later. If the machine goes faster, the arms k k come into contact sooner with the lever H, and if the machine goes slower they come into contact later. Whenever one of the arms 10 k thus comes into contact with the lever H it is lifted out of gear with the corresponding shoulder, z or z, on segment S, the segment S is forced back to the central or closing position by the levers w w, and the valve is closed. The number of revolutions in the machine thus governs the length of time the steam is allowed to flow in. As the arms k k strike perpendicularly against the lever H, the latter is not inlluenced in its rising or falling by the power requisite to overcome the tension of the springs or weights acting on said arms lc k, and the governor has not to exercise great force. As the spindle s has its end resting in an exactly-fitting shoulder or recess, 6, thereby reducing the friction to a minimum, the variating pressure of steam for the crosssection of the stuffing-box, through which the spindle 8 passes, does not afiect the apparatus. This, in connection with the fact that the operation of the valve B requires only a slight turning, whereby the stuffing-box friction of an axially-reciprocating bar is avoided, consti tutes one oft-he advantages ofthis construction.

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

1. The combination, with a governor for steam-engines, having an automatically-variating cut-off, of an oscillating valve opening in two directions, and provided with a spindle turning in a stuifing-box, said spindle resting against a shoulder or support upon the end of a shaft having an oscillating lever mounted thereon, substantially as and for the purpose set forth.

2. In a governor apparatus, the combination, with the segment S, of arms k it, moving in a plane perpendicular to the plane of move-. ment of the governor-arm H, substantially as and for the purpose set forth.

3. In a governor, the combination, with an oscillating valve and spindle s, of a segment,

S, levers at x, and arms k 70, substantially as and for the purpose set forth.

4. In a governor, the combination, with an oscillating valve and spindle s, ofa segment, S, levers w 00, and arms 70 is, said arms k k being operated by a shaft, w, provided with a shoulder or recess, 2', substantially as and for the purpose set forth.

In testimony that '1 claim this as my own I have hereunto set my hand and seal in the presence of two subscribing witnesses.

' PAUL GRUDELBACH. IL. s]

Witnesses BRUNO KNIFFLE,

B. ROI.

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