US322084A - wilder - Google Patents

wilder Download PDF

Info

Publication number
US322084A
US322084A US322084DA US322084A US 322084 A US322084 A US 322084A US 322084D A US322084D A US 322084DA US 322084 A US322084 A US 322084A
Authority
US
United States
Prior art keywords
lever
valve
piece
spring
frame
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
Publication date
Application granted granted Critical
Publication of US322084A publication Critical patent/US322084A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/0413—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded in the form of closure plates
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/7904—Reciprocating valves
    • Y10T137/7922—Spring biased

Definitions

  • This improvement relates to safety-valves in which springs are employed to resist the force tending to move the valve away from its I will describe asafety-valve embodying my improvement, and then point out the improvement in claims.
  • Figure 1 is I5 longitudinal section of a safety-valve embodying my improvement.
  • Fig. 2 is a longitudinal section taken in a plane at right angles to that of Fig. l.
  • Fig. 3 is a transverse section thereof taken on the lines x x, Fig. 1.
  • FIG. 5 is a longitudinal section of a valve, showing a modification thereof.
  • Fig. 6 is a sectional detail view of the same, and
  • Fig. 7 is another sectional detail view of the same.
  • A designates the frame of the valve by which the various parts are supported. As shown, it consists of two arm-like portions, a c, fast 30 upon a base-piece, B, and bearing at their ends a cylindrical rim-like portion, O.
  • the said arm-like portions, the base-piece, and the ring-like portion are preferably made integral.
  • the base-piece B is of circular form and hollow. It extends for a' considerable distance laterally beyond the arm-like portions a ce. 4This is to afford provision for the escape of steam through apertures b in the upic per portion. of the base-piece B.
  • Acoupling-piece, D is adapted to be screwed into the lower portion of the base-piece B.
  • Said couplingpiece is adapted to be secured in any suitable manner to a steam-boiler.
  • the couplingpiece Near 45 its upper end the couplingpiece constitutes a valve-seat for a valve, E.
  • Guides c on the valve E guide the valve in its movements.
  • a recess in a projection, c', in the upper portion of the valve is adapted to receive one end of o apin, F.
  • the valve is further guided in its movements by the projection c, which is adapted to move through an aperture in the upper portion of the base-piece B.' As shown, the outwardly-extending end of the pin F is bifurcated.
  • the lever G is a lever fulcrumed near one end upon a fulcrum-piece, d, forming part of the frame A. About midway of its length the lever G is recessed upon its under side to receive the bifurcated end of the pin F. It will be seen that when the valve E is raised from its seat it operates to move the lever G, through the medium of the pin F.
  • H is an adjustable section of the lever G. lt is adapted to be moved backward and forward upon the upper surface of the lever G. Owing to the contour of the upper surface of the lever G the adjustable section H may be moved thereon in a direction obliquely to the direction of the movement of the valve.
  • a set-screw, l, engaging with one end of the adjustable section H, and bearing at its free end upon the main section of the lever G, may be adjusted to vary the position of the adjustable section H upon the main section of the lever G.
  • Guides e e on the main section of the lever G guide the adjustable section H in its movements.
  • the bearing J is a spring, shown as helical, arranged between the arm-like portions au' ofthe frame A.
  • Bearingpieces K K are arranged one upon each end of the spring J.
  • the bearingpieceK is provided with a projection, f, upon its lower side.
  • Such projection is preferably knifeedged at its lower extremity, and is adapted to bear upon the upper surface of the adjustable section H of the lever G.
  • the bearing-piece K is provided upon its Lipper surface with a projection, g, adapted to receive a knifeedged projection, h, upon theinner end l IOO pleasure.
  • a convenient form of device for this purpose is shown in the drawings. It consists of a lever, M, having a bifureated end extending between the arm-like portions a a of the frame A.
  • the bifurcate arms of the lever pass one upon each side of the pin F, and so as not to interfere with the rising of the valve.
  • a projection or rib, t', upon the upper surface of the lever M, is shown for acting against the lever G.
  • the valve E By manipulating the lever M the valve E may be raised from its seat.
  • N is a cylindrical case or shell adapted to inclose the parts. It may be moved on and oit' longitudinally at pleasure.
  • the valve may be set to operate at any desired steam-pressure, as by such variation the resistance ot' the spring may be increased or decreased.
  • O designates a frame having a circular base portion, o, and arm-like portions ⁇ 0.
  • a semicircular connecting-piece, o2 extends between the arm-like portions o, but the same may be omitted.
  • the pin F is preferably made integral with the frame O.
  • a projection, o3, upon the under side of the circular base portion o of the frame serves to raise said base portion somewhat above the bottom of case or shell N.
  • the spring J is arranged within the frame O.
  • the lower end of the spring rests upon a bearing-piece, K.
  • Aserew, p passing through a screw threaded aperture in the projection o on the base portion o, is afxed to the bearing-piece K.
  • a bearing-piece, K is arranged upon the opposite end of the spring J.
  • Said bearing-piece has a knife-edged projection upon its upper surface adapted to bear upon the adjustable section H, arranged beneath and adapted to be moved backward and forward within guides upon the lever G.
  • the lever G is fulcrumed at 1' upon downwardly-extending parts of the arm-like portions o' of the frame O. Pins or projections s on the lever G are adapted to abut against projections s near the upper end of the armlike portions o', and prevent the lever G from moving so far in one direction as it would otherwise do.
  • the set-screw I has upon it a circumferential rim adapted to engage with a slot in the adjustable section H of the lever G, whereby, when the screw is turned, it will carry with it in its forward and backward movement the said adjustable section.
  • a stop, t, on the adjustable section H prevents a too-extended movement in one direction.
  • the resistance of the spring J may be varied.
  • a safety-valve the combination of a valve, a lever having an adjustable section. a connection between the valve and the lever, and a spring exerting force at one end against the adjustable section of the lever for operating the level' in one direction, substantially as specified.
  • a safety-valve the combination of a valve, a lever having an adjustable section, a connection between the lever and the valve, a spring exerting force at one end upon the adjustable section of the lever, and at the other end upon an adjustable bearing-point, substantially as specified.
  • a safety-valve the combination of a valve, E, a pin, F, a lever, G, fulerumed upon a fixed portion ofthe frame of the valve, and having an obliquelyadjustable section, H, the spring J, and the trip M, substantially as specified.
  • a safety-valve the combination of a frame, A, having the base-piece B, extending beyond the main or upper port-ion of the case or shell, apertures bin the base-piece B, the valve E, the pin F, the lever G, and the spring J, substantially as specified.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Safety Valves (AREA)

Description

2 Sheets-Sheet 1.
'(No Model.)
H. C. WILDER SAFETY VALVE.
PKTERS, PhuurLkhogmpmr, wumn 2 Sheets-Sheet 2.
(No Model.)
H. C. WILDBR.
SAFETY VALVE.
N0..322,084. Patented July 14, 1885.
Unirse @rares Ferrini? Ottieni..
HENRY O. VILDEE, OF ASHBY, MASSACHUSETTS, ASSIGNOR OF ONE-HALF TO JOEL G. WILLARD, OF NEV YORK, N. Y.
SAFETY-VALVE.
SPMCEECATIQN forming part of Letters Patent No. 322,084, dated July 141-, 1335,
Application tiled December l0, 1894. (No moel.)
To all whom it may concern.'
Be it known that I, HENRY O. VILDER, of Ashby, in the county of Middlesex and State of Massachusetts, haveinvented a certain new and useful Improvement in Safety-Valves, of which the following is a specification.
This improvement relates to safety-valves in which springs are employed to resist the force tending to move the valve away from its I will describe asafety-valve embodying my improvement, and then point out the improvement in claims.
In the accompanying drawings, Figure 1 is I5 longitudinal section of a safety-valve embodying my improvement. Fig. 2 is a longitudinal section taken in a plane at right angles to that of Fig. l. Fig. 3 is a transverse section thereof taken on the lines x x, Fig. 1. Fig. 4.
2O is a detail view thereof. Fig. 5 is a longitudinal section of a valve, showing a modification thereof. Fig. 6 is a sectional detail view of the same, and Fig. 7 is another sectional detail view of the same. l
2 5 Similar letters of reference designate corresponding parts in all the gures.
A designates the frame of the valve by which the various parts are supported. As shown, it consists of two arm-like portions, a c, fast 30 upon a base-piece, B, and bearing at their ends a cylindrical rim-like portion, O. The said arm-like portions, the base-piece, and the ring-like portion are preferably made integral.
35 The base-piece B is of circular form and hollow. It extends for a' considerable distance laterally beyond the arm-like portions a ce. 4This is to afford provision for the escape of steam through apertures b in the upic per portion. of the base-piece B.
Acoupling-piece, D,is adapted to be screwed into the lower portion of the base-piece B. Said couplingpiece is adapted to be secured in any suitable manner to a steam-boiler. Near 45 its upper end the couplingpiece constitutes a valve-seat for a valve, E. Guides c on the valve E guide the valve in its movements. A recess in a projection, c', in the upper portion of the valve is adapted to receive one end of o apin, F. The valve is further guided in its movements by the projection c, which is adapted to move through an aperture in the upper portion of the base-piece B.' As shown, the outwardly-extending end of the pin F is bifurcated.
G is a lever fulcrumed near one end upon a fulcrum-piece, d, forming part of the frame A. About midway of its length the lever G is recessed upon its under side to receive the bifurcated end of the pin F. It will be seen that when the valve E is raised from its seat it operates to move the lever G, through the medium of the pin F.
H is an adjustable section of the lever G. lt is adapted to be moved backward and forward upon the upper surface of the lever G. Owing to the contour of the upper surface of the lever G the adjustable section H may be moved thereon in a direction obliquely to the direction of the movement of the valve.
A set-screw, l, engaging with one end of the adjustable section H, and bearing at its free end upon the main section of the lever G, may be adjusted to vary the position of the adjustable section H upon the main section of the lever G. Guides e e on the main section of the lever G guide the adjustable section H in its movements.
J is a spring, shown as helical, arranged between the arm-like portions au' ofthe frame A. Bearingpieces K K are arranged one upon each end of the spring J. The bearingpieceK is provided with a projection, f, upon its lower side. Such projection is preferably knifeedged at its lower extremity, and is adapted to bear upon the upper surface of the adjustable section H of the lever G. The bearing-piece K is provided upon its Lipper surface with a projection, g, adapted to receive a knifeedged projection, h, upon theinner end l IOO pleasure. A convenient form of device for this purpose is shown in the drawings. It consists of a lever, M, having a bifureated end extending between the arm-like portions a a of the frame A. The bifurcate arms of the lever pass one upon each side of the pin F, and so as not to interfere with the rising of the valve. A projection or rib, t', upon the upper surface of the lever M, is shown for acting against the lever G. By manipulating the lever M the valve E may be raised from its seat.
N is a cylindrical case or shell adapted to inclose the parts. It may be moved on and oit' longitudinally at pleasure.
Steam entering the coupling-piece D operates to raise the valve E from its seat. Force is thereupon exerted upon the lever G by means of the pin F, which force the spring J has a tendency to counteract. As the lever G is raised, however, it operates to oseillate the spring J in one direction, thus shifting the point upon the lever where the resistance of the spring is exerted, and moving such point of resistance more and more out of the line of application of force exerted by the escaping steam. By this arrangement the tendency ol' the resistance of a spring to increase when arranged to receive the application ot' a force exerted to overcome such resistance in a direct line is overcome, and the danger arising from sudden and undue increase of boilerpressure is averted.
By varying the position of the adjustable section Hof the lever G, the valve may be set to operate at any desired steam-pressure, as by such variation the resistance ot' the spring may be increased or decreased.
ln the example of my improvement shown in Figs. 5, 6, and 7 the frame A, as shown in Figs. l, 2, and 3, is not needed, and for this reason the shell N and the base-piece B are preferably made integral.
O designatesa frame having a circular base portion, o, and arm-like portions` 0. A semicircular connecting-piece, o2, extends between the arm-like portions o, but the same may be omitted. Inthis example of my improvement the pin F is preferably made integral with the frame O. A projection, o3, upon the under side of the circular base portion o of the frame serves to raise said base portion somewhat above the bottom of case or shell N.
The spring J is arranged within the frame O. The lower end of the spring rests upon a bearing-piece, K. Aserew, p, passing through a screw threaded aperture in the projection o on the base portion o, is afxed to the bearing-piece K. A bearing-piece, K, is arranged upon the opposite end of the spring J. Said bearing-piecehas a knife-edged projection upon its upper surface adapted to bear upon the adjustable section H, arranged beneath and adapted to be moved backward and forward within guides upon the lever G. The lever G is fulcrumed at 1' upon downwardly-extending parts of the arm-like portions o' of the frame O. Pins or projections s on the lever G are adapted to abut against projections s near the upper end of the armlike portions o', and prevent the lever G from moving so far in one direction as it would otherwise do.
The set-screw I has upon it a circumferential rim adapted to engage with a slot in the adjustable section H of the lever G, whereby, when the screw is turned, it will carry with it in its forward and backward movement the said adjustable section. A stop, t, on the adjustable section H prevents a too-extended movement in one direction.
The knife-edged projection upon the cylindrical plug L bears upon the upper surface of the lever G.
By adjusting the serewp inwardly or outwardly the resistance of the spring J may be varied.
The operation of this example of my improvement is that of toggle-levers, of which the frame O constitutes one lever, and the lever G the other. Vhen pressure is exerted upon the valve, it operates to raise the frame or lever O. Thelever G is then caused to be moved against the resistance ot' the spring J, the result being that the levers are oseillated.
Vhat I claim as my invention, and desire to secure by Letters Patent, is-
I. In a safety-valve, the combination of a valve, a lever having an adjustable section. a connection between the valve and the lever, and a spring exerting force at one end against the adjustable section of the lever for operating the level' in one direction, substantially as specified.
2. In a safety-valve, the combination of a valve, a lever having an adjustable section, a connection between the lever and the valve, a spring exerting force at one end upon the adjustable section of the lever, and at the other end upon an adjustable bearing-point, substantially as specified.
3. In a safety-valve, the combination ol' a valve, E, a pin, F, a lever, G, fulerumed upon a fixed portion of the frame of the valve, and having anobliquely-adj ustable section, H, the spring J, and the plug L, substantially as specified.
4. In a safety-valve, the combination of a valve, E, a pin, F, a lever, G, fulerumed upon a fixed portion ofthe frame of the valve, and having an obliquelyadjustable section, H, the spring J, and the trip M, substantially as specified.
5. In a safety-valve, the combination of a frame, A, having the base-piece B, extending beyond the main or upper port-ion of the case or shell, apertures bin the base-piece B, the valve E, the pin F, the lever G, and the spring J, substantially as specified.
HENRY C. VVILDER.
Witnesses:
T. J. KEANE, XV. G. Lirsnv.
US322084D wilder Expired - Lifetime US322084A (en)

Publications (1)

Publication Number Publication Date
US322084A true US322084A (en) 1885-07-14

Family

ID=2391222

Family Applications (1)

Application Number Title Priority Date Filing Date
US322084D Expired - Lifetime US322084A (en) wilder

Country Status (1)

Country Link
US (1) US322084A (en)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2547882A (en) * 1945-04-30 1951-04-03 Norton Orlo Clair Means for regulating temperature and pressure operated valves
US4842015A (en) * 1987-09-24 1989-06-27 Wabco Westinghouse Fahrzeugbremsen Gmbh Check valve
US5735501A (en) * 1995-05-19 1998-04-07 Emerson Electric Gmbh & Co. Valve arrangement
US20030029425A1 (en) * 2001-06-14 2003-02-13 Andre Veinotte Fuel system including an apparatus for fuel vapor pressure management
US20040173262A1 (en) * 2003-03-07 2004-09-09 Siemens Vdo Automotive Corporation Flow-through diaphragm for a fuel vapor pressure management apparatus
US20040237637A1 (en) * 2003-01-17 2004-12-02 Andre Veinotte Flow sensor for purge valve diagnostic
US20040237944A1 (en) * 2003-01-17 2004-12-02 Andre Veinotte Flow sensor for purge valve diagnostic
US20040255657A1 (en) * 2002-12-17 2004-12-23 Perry Paul D. Apparatus, system and method of establishing a test threshold for a fuel vapor leak detection system
US20050005689A1 (en) * 2003-01-17 2005-01-13 Andre Veinotte Flow sensor integrated with leak detection for purge valve diagnostic
US6948355B1 (en) 2002-09-23 2005-09-27 Siemens Vdo Automotive, Incorporated In-use rate based calculation for a fuel vapor pressure management apparatus
US20050211331A1 (en) * 2002-09-23 2005-09-29 Paul Perry Rationality testing for a fuel vapor pressure management apparatus
US6986357B2 (en) 2002-09-23 2006-01-17 Siemens Vdo Automotive Inc. Method of designing a fuel vapor pressure management apparatus
US7011077B2 (en) 2003-03-07 2006-03-14 Siemens Vdo Automotive, Inc. Fuel system and method for managing fuel vapor pressure with a flow-through diaphragm
US7028674B2 (en) 2003-01-17 2006-04-18 Siemens Vdo Automotive Inc. Flow sensor integrated with leak detection for purge valve diagnostic
US7117880B2 (en) 2002-09-23 2006-10-10 Siemens Vdo Automotive Inc. Apparatus and method of changing printed circuit boards in a fuel vapor pressure management apparatus
US20180022191A1 (en) * 2016-07-21 2018-01-25 Hanon Systems Suction dampening device with internal dampening for vehicle air conditioning compressor

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2547882A (en) * 1945-04-30 1951-04-03 Norton Orlo Clair Means for regulating temperature and pressure operated valves
US4842015A (en) * 1987-09-24 1989-06-27 Wabco Westinghouse Fahrzeugbremsen Gmbh Check valve
US5735501A (en) * 1995-05-19 1998-04-07 Emerson Electric Gmbh & Co. Valve arrangement
US6820642B2 (en) 2001-06-14 2004-11-23 Siemens Vdo Automotive Inc. Apparatus for fuel vapor pressure management
US6851443B2 (en) * 2001-06-14 2005-02-08 Siemens Vdo Automotive, Inc. Apparatus and method for preventing resonance in a fuel vapor pressure management apparatus
US20030056771A1 (en) * 2001-06-14 2003-03-27 Andre Veinotte Poppet for a fuel vapor pressure management apparatus
US20030070473A1 (en) * 2001-06-14 2003-04-17 Andre Veinotte Apparatus and method for preventing resonance in a fuel vapor pressure management apparatus
US6941933B2 (en) 2001-06-14 2005-09-13 Siemens Vdo Automotive Inc. Fuel system including an apparatus for fuel vapor pressure management
US6913036B2 (en) 2001-06-14 2005-07-05 Siemens Vdo Automotive Inc. Bi-directional flow seal for a fuel vapor pressure management apparatus
US6892754B2 (en) 2001-06-14 2005-05-17 Siemens Vdo Automotive Inc. Poppet for a fuel vapor pressure management apparatus
US20030029425A1 (en) * 2001-06-14 2003-02-13 Andre Veinotte Fuel system including an apparatus for fuel vapor pressure management
US20030037772A1 (en) * 2001-06-14 2003-02-27 Andre Veinotte Apparatus for fuel vapor pressure management
US20050211331A1 (en) * 2002-09-23 2005-09-29 Paul Perry Rationality testing for a fuel vapor pressure management apparatus
US6986357B2 (en) 2002-09-23 2006-01-17 Siemens Vdo Automotive Inc. Method of designing a fuel vapor pressure management apparatus
US7028722B2 (en) 2002-09-23 2006-04-18 Siemens Vdo Automotive, Inc. Rationality testing for a fuel vapor pressure management apparatus
US6948355B1 (en) 2002-09-23 2005-09-27 Siemens Vdo Automotive, Incorporated In-use rate based calculation for a fuel vapor pressure management apparatus
US7117880B2 (en) 2002-09-23 2006-10-10 Siemens Vdo Automotive Inc. Apparatus and method of changing printed circuit boards in a fuel vapor pressure management apparatus
US7004014B2 (en) 2002-12-17 2006-02-28 Siemens Vdo Automotive Inc Apparatus, system and method of establishing a test threshold for a fuel vapor leak detection system
US20040255657A1 (en) * 2002-12-17 2004-12-23 Perry Paul D. Apparatus, system and method of establishing a test threshold for a fuel vapor leak detection system
US20050005689A1 (en) * 2003-01-17 2005-01-13 Andre Veinotte Flow sensor integrated with leak detection for purge valve diagnostic
US20040237944A1 (en) * 2003-01-17 2004-12-02 Andre Veinotte Flow sensor for purge valve diagnostic
US20040237637A1 (en) * 2003-01-17 2004-12-02 Andre Veinotte Flow sensor for purge valve diagnostic
US7028674B2 (en) 2003-01-17 2006-04-18 Siemens Vdo Automotive Inc. Flow sensor integrated with leak detection for purge valve diagnostic
US7201154B2 (en) 2003-01-17 2007-04-10 Siemens Canada Limited Flow sensor for purge valve diagnostic
US6953027B2 (en) 2003-03-07 2005-10-11 Siemens Vdo Automotive Inc. Flow-through diaphragm for a fuel vapor pressure management apparatus
US7011077B2 (en) 2003-03-07 2006-03-14 Siemens Vdo Automotive, Inc. Fuel system and method for managing fuel vapor pressure with a flow-through diaphragm
US20040173262A1 (en) * 2003-03-07 2004-09-09 Siemens Vdo Automotive Corporation Flow-through diaphragm for a fuel vapor pressure management apparatus
US20180022191A1 (en) * 2016-07-21 2018-01-25 Hanon Systems Suction dampening device with internal dampening for vehicle air conditioning compressor
US10591074B2 (en) * 2016-07-21 2020-03-17 Hanon Systems Suction dampening device with internal dampening for vehicle air conditioning compressor

Similar Documents

Publication Publication Date Title
US322084A (en) wilder
US1162935A (en) Safety-valve.
US424199A (en) John n
US306568A (en) wildee
US545083A (en) Boiler feed-pump regulator
US622875A (en) Gate-valve
US485699A (en) Amos p
US750881A (en) Gage-cock
US152444A (en) Improvement in magnetic safety or relief valves
US249218A (en) James aethue
US877581A (en) Automatic high and low boiler-pressure alarm.
US461149A (en) Pop safety-valve
US787422A (en) Whistle-valve.
US159580A (en) Improvement in safety-valves for steam-boilers
US1101121A (en) Safety-valve.
US564047A (en) John s
US306385A (en) Safety-valve
US452230A (en) Muffled pop safety-valve
US915587A (en) Pressure-regulating device for gas and steam.
US394573A (en) Steam-engine governor
US84298A (en) Improvement in water-indicator for steam-boilers
US49068A (en) Improvement in safety-valves for steam-generators
USRE3535E (en) Improvement in safety-valves
US81006A (en) Improvement in pressure-indicators
US344866A (en) George w