US443873A - Safety device for vulcanizing apparatus - Google Patents
Safety device for vulcanizing apparatus Download PDFInfo
- Publication number
- US443873A US443873A US443873DA US443873A US 443873 A US443873 A US 443873A US 443873D A US443873D A US 443873DA US 443873 A US443873 A US 443873A
- Authority
- US
- United States
- Prior art keywords
- disk
- copper
- ring
- safety device
- stud
- 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
Links
- RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 48
- 229940108928 Copper Drugs 0.000 description 44
- 229910052802 copper Inorganic materials 0.000 description 44
- 239000010949 copper Substances 0.000 description 44
- 229910001369 Brass Inorganic materials 0.000 description 22
- 239000010951 brass Substances 0.000 description 22
- 206010022114 Injury Diseases 0.000 description 12
- 210000003414 Extremities Anatomy 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000036633 rest Effects 0.000 description 4
- 230000000284 resting Effects 0.000 description 4
- 210000001364 Upper Extremity Anatomy 0.000 description 2
- 235000014987 copper Nutrition 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000009877 rendering Methods 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
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
- F16K17/14—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side with fracturing member
- F16K17/16—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side with fracturing member with fracturing diaphragm ; Rupture discs
- F16K17/162—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side with fracturing member with fracturing diaphragm ; Rupture discs of the non reverse-buckling-type
-
- 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
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S137/00—Fluid handling
- Y10S137/91—Destructible or deformable element constructed of specific material
-
- 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
- Y10T137/1624—Destructible or deformable element controlled
- Y10T137/1632—Destructible element
- Y10T137/1692—Rupture disc
- Y10T137/1714—Direct pressure causes disc to burst
Definitions
- This invention relates to that type of safety devices for dental vulcanizin g apparatus wherein a thin copper disk is secured on the end of a tubular stud by a screw-cap, a brass washer being placed between the screw-capv and the copper disk to determine the amount of exposure of the disk, the construction being such that when the tubular stud is attached to the vulcanizer the steam presses upon the lower side of the copper disk, and if the steam-pressure is allowed to become excessive the disk is ruptured or gives way and relieves the pressure.
- the injury to the copper disk arises mainly from two causes: first, the dentist sometimes adjusts the screwcap so tightly in place that the brass washer is forced slightly into the end of the stud, thereby forming a shoulder which, though almost imperceptible, is sufficient to part-lyshear or cut the thin copper disk, in consequence of which the latter is so weakened that it is incapable of withstanding the full steampressure required for vulcanization; second, the copper disk when subjected to steampressnre is bulged upwardly or outwardly, thereby forming a cavityor chamber between it and the end of the stud, into which a deposit forms, which, if not removed when the disk is renewed, has the same effect as the shoulder above mentioned, in that it strains the disk, and hence the latter will not withstand the required steam-pressure.
- lllyfnvention is'illustratecl"in"the accompanying drawings, in which a Figure 1 shows a vertical central sectional view of the safetydevice on an enlarged scale. Fig. 2 shows a detail perspective view of the brass washer, thehard-rolled copper disk, and the soft-copper ring.
- the numeral 1 indicates a tubular stud having externally-screw-threaded end portions 2 and 3 and an angular head 4 for the purpose of screwing the end portions 3into the vulcanizing apparatus, as is the usual practice with this type of safety devices.
- the internally-screw-threaded cap or nut 5 is adapted to screw upon the end portion 2 of the stud, and is provided with a central orifice 6.
- the extremity of the end portion 2 is perfectly flat and upon the same is arranged a metallic ring 7, and upon this ring rests the thin cop per disk 8, which is adapted to be ruptured or give way when the steam-pressure becomes excessive.
- the brass washer 9 rests upon the upper side of the thin copper disk and the screw cap or nut presses upon such brass washer in such a manner that when the nut or cap is'screwed into proper position it serves to clamp the brass Washer, the thin copper disk, and the metallic ring over the fiat extremity of the end portion 2 of the tubular stud, copper disk is hard-rolled, and the ring, made of copper, is comparatively soft, and consequently in placing the parts together the soft copper ring yields to pressure and prevents any injury to the copper disk.
- the orifice or The thin- IOO hole through the copper ring is of greater diameter than the orifice or hole through the brass washer.
- the two are kept from contact, and if the face of the stud should be untrue from any cause asteam-tight joint is produced without injury to the disk.
- the ring if of soft copper, is not likely to injure the face of either the stud or the brass washer, sinceityields to the pressure of screwing on the screw-cap and in sures a tight joint.
- the hole or orifice of the ring should be greater in diameter than that of the brass washer, for if the two holes or orifices were of the same size or if that in the ring were smallest, the
- a safety device for vulcanizing apparatus consisting of a screw-threaded tubular stud, a metallic ring resting on the upper extremity of the stud, a disk resting on the ring, a metallic washer above the disk, and the rctaining nut or cap, said ring having its orifice or hole of greater diameter than the orifice or hole in the metallic washer, substantially as and for the purpose described.
Description
(No Model.)
G. B. SNOW. SAFETY DEVICE FOR VULOANIZING APPARATUS.
Patented Dec. 30
UNITED STATES PATENT OFFICEe GEORGE E. SNOW', OF BUFFALO, NElV YORK.
SAFETY DEVICE FOR VULCANIZING APPARATUS.
SPECIFICATION forming part of Letters Patent No. 443,873, dated December 30,1890.
Application filed October 13, 1890' Serial No. 367,998. (No model.)
To all whom it may concern:
Be it known that I, GEORGE B. SNOW, a citizen of the United States, residing at Buffalo, in the county of Erie and State of New York, haveinvented new and useful Improvements in Safety Devices for Vulcanizing Apparatus, of which the following is a specification.
This invention relates to that type of safety devices for dental vulcanizin g apparatus wherein a thin copper disk is secured on the end of a tubular stud by a screw-cap, a brass washer being placed between the screw-capv and the copper disk to determine the amount of exposure of the disk, the construction being such that when the tubular stud is attached to the vulcanizer the steam presses upon the lower side of the copper disk, and if the steam-pressure is allowed to become excessive the disk is ruptured or gives way and relieves the pressure. The prior construction is reliable if properly manipulated, but has been found objectionable, in that some dentists so operate the safety device that instead of the copper disk remaining intact until there is an excessive pressure of steam, such disk, by being injured in its application to the stud and screw-cap, is rupturedor gives way at or near the vulcanizing-point and so m etimes below such point. The injury to the copper disk arises mainly from two causes: first, the dentist sometimes adjusts the screwcap so tightly in place that the brass washer is forced slightly into the end of the stud, thereby forming a shoulder which, though almost imperceptible, is sufficient to part-lyshear or cut the thin copper disk, in consequence of which the latter is so weakened that it is incapable of withstanding the full steampressure required for vulcanization; second, the copper disk when subjected to steampressnre is bulged upwardly or outwardly, thereby forming a cavityor chamber between it and the end of the stud, into which a deposit forms, which, if not removed when the disk is renewed, has the same effect as the shoulder above mentioned, in that it strains the disk, and hence the latter will not withstand the required steam-pressure. These objections are so annoying that dentists sometimes plug up the safety device, and consequently, if the vulcanizer is overheated there is great danger of explosion. I have after many experiments found that the objection is overcome by the employment of a metallic ring, preferably of soft copper, placed on the face of the tubular stud beneath the disk and having a hole or orifice greater in diameter than the holefor orifice in the brass washer, which is placed above the copper disk, thereby preventing injury to such disk, as the latter is hard-rolled, whilethe copperringaspfsoft metal and cons eqfientlyyields to the pressure to protect the copper disk against injury.
lllyfnvention is'illustratecl"in"the accompanying drawings, in which a Figure 1 shows a vertical central sectional view of the safetydevice on an enlarged scale. Fig. 2 shows a detail perspective view of the brass washer, thehard-rolled copper disk, and the soft-copper ring.
In order to enable those skilled in the art to make and use my invention, I willnow describe the same in detail, referring to the drawings, wherein The numeral 1 indicates a tubular stud having externally-screw-threaded end portions 2 and 3 and an angular head 4 for the purpose of screwing the end portions 3into the vulcanizing apparatus, as is the usual practice with this type of safety devices. The internally-screw-threaded cap or nut 5 is adapted to screw upon the end portion 2 of the stud, and is provided with a central orifice 6. The extremity of the end portion 2 is perfectly flat and upon the same is arranged a metallic ring 7, and upon this ring rests the thin cop per disk 8, which is adapted to be ruptured or give way when the steam-pressure becomes excessive.
The brass washer 9 rests upon the upper side of the thin copper disk and the screw cap or nut presses upon such brass washer in such a manner that when the nut or cap is'screwed into proper position it serves to clamp the brass Washer, the thin copper disk, and the metallic ring over the fiat extremity of the end portion 2 of the tubular stud, copper disk is hard-rolled, and the ring, made of copper, is comparatively soft, and consequently in placing the parts together the soft copper ring yields to pressure and prevents any injury to the copper disk. The orifice or The thin- IOO hole through the copper ring is of greater diameter than the orifice or hole through the brass washer.
I have found in actual practice that the employment of the soft-copper ring effectually protects the copper disk from injury and entirely avoids the liability of the copper disk being ruptured or giving way at or below the yuicanizing-point.
By inserting the metallic ring between the flat end of the tubular stud and the copper disk the two are kept from contact, and if the face of the stud should be untrue from any cause asteam-tight joint is produced without injury to the disk. The ring, if of soft copper, is not likely to injure the face of either the stud or the brass washer, sinceityields to the pressure of screwing on the screw-cap and in sures a tight joint. To effect the best results the hole or orifice of the ring should be greater in diameter than that of the brass washer, for if the two holes or orifices were of the same size or if that in the ring were smallest, the
ring in yielding to pressure would have its inner edge forced into the orifice in the brass washer, and therefore the interposed copper disk would be strained and sheared, thus rendering it incapable of withstanding the re quired steam-pressure.
Having thus described my invention, what I claim is A safety device for vulcanizing apparatus, consisting of a screw-threaded tubular stud, a metallic ring resting on the upper extremity of the stud, a disk resting on the ring, a metallic washer above the disk, and the rctaining nut or cap, said ring having its orifice or hole of greater diameter than the orifice or hole in the metallic washer, substantially as and for the purpose described.
In testimony whereof I have aifixed my signature in presence of two witnesses.
GEORGE E. SNOW.
\Vitnesses:
SAMUEL M. WELon, J 1-,, JOHN E. Home.
Publications (1)
Publication Number | Publication Date |
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US443873A true US443873A (en) | 1890-12-30 |
Family
ID=2512768
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US443873D Expired - Lifetime US443873A (en) | Safety device for vulcanizing apparatus |
Country Status (1)
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US (1) | US443873A (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2526794A (en) * | 1946-03-23 | 1950-10-24 | Du Pont | Safety device for pressure vessels |
US2562672A (en) * | 1946-12-11 | 1951-07-31 | Black Sivalls & Bryson Inc | Combination pressure relief and safety head valve |
US2920638A (en) * | 1956-11-05 | 1960-01-12 | Heckethorn Mfg & Supply Co | Valved container cap having a frangible disk therein |
US3204819A (en) * | 1964-04-01 | 1965-09-07 | Casco Products Corp | Combination sealing device |
US5890504A (en) * | 1995-08-31 | 1999-04-06 | Lenzing Aktiengesellschaft | Process for transporting a thermally unstable viscous mass |
US5979477A (en) * | 1998-02-04 | 1999-11-09 | Trebor International, Inc. | High purity, non-contaminating, burst disk |
US6173767B1 (en) * | 1996-10-11 | 2001-01-16 | Sgcm Partnership, L.P. | Pressure release device for cooling coils |
US20060196539A1 (en) * | 2003-03-01 | 2006-09-07 | Raska Nathan C | Reversible rupture disk apparatus and method |
US9448018B2 (en) | 2012-11-19 | 2016-09-20 | Robert Cooney | Expansion relief header for protecting heat transfer coils in HVAC systems |
US10260823B2 (en) | 2012-11-19 | 2019-04-16 | Robert Cooney | Freeze protection system with drainage control for heat transfer coils in HVAC systems |
-
0
- US US443873D patent/US443873A/en not_active Expired - Lifetime
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2526794A (en) * | 1946-03-23 | 1950-10-24 | Du Pont | Safety device for pressure vessels |
US2562672A (en) * | 1946-12-11 | 1951-07-31 | Black Sivalls & Bryson Inc | Combination pressure relief and safety head valve |
US2920638A (en) * | 1956-11-05 | 1960-01-12 | Heckethorn Mfg & Supply Co | Valved container cap having a frangible disk therein |
US3204819A (en) * | 1964-04-01 | 1965-09-07 | Casco Products Corp | Combination sealing device |
US5890504A (en) * | 1995-08-31 | 1999-04-06 | Lenzing Aktiengesellschaft | Process for transporting a thermally unstable viscous mass |
US6173767B1 (en) * | 1996-10-11 | 2001-01-16 | Sgcm Partnership, L.P. | Pressure release device for cooling coils |
US5979477A (en) * | 1998-02-04 | 1999-11-09 | Trebor International, Inc. | High purity, non-contaminating, burst disk |
US20060196539A1 (en) * | 2003-03-01 | 2006-09-07 | Raska Nathan C | Reversible rupture disk apparatus and method |
US9448018B2 (en) | 2012-11-19 | 2016-09-20 | Robert Cooney | Expansion relief header for protecting heat transfer coils in HVAC systems |
US9541338B2 (en) | 2012-11-19 | 2017-01-10 | Robert Cooney | Method for controlling an expansion relief header for protecting heat transfer coils in HVAC systems |
US10260823B2 (en) | 2012-11-19 | 2019-04-16 | Robert Cooney | Freeze protection system with drainage control for heat transfer coils in HVAC systems |
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