US1568981A - Stay bolt for boilers - Google Patents
Stay bolt for boilers Download PDFInfo
- Publication number
- US1568981A US1568981A US500644A US50064421A US1568981A US 1568981 A US1568981 A US 1568981A US 500644 A US500644 A US 500644A US 50064421 A US50064421 A US 50064421A US 1568981 A US1568981 A US 1568981A
- Authority
- US
- United States
- Prior art keywords
- bolt
- boilers
- diameter
- stay bolt
- threaded
- 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
- 238000005242 forging Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B7/00—Steam boilers of furnace-tube type, i.e. the combustion of fuel being performed inside one or more furnace tubes built-in in the boiler body
- F22B7/16—Component parts thereof; Accessories therefor, e.g. stay-bolt connections
Definitions
- This invention relates to improvements in staybolts for boilers and more particularly to those of the fle3ible type in which the bolt is provided with a rounded head to be movably mounted in a bearing member carried by the outer boiler sheet.
- Gne object of my present invention is to so construct a staybolt of the flexible type as to economize in material forming the body or shank aortion of the bolt; so that its tire-box end shall be available for adapting the same to pass through threaded holes of difierent sizes in the fire-box sheet of the boiler construction, and so that ample clearance between the bolt and the bearing devices shall be provided, to permit free movement of the bolt during expansion and contraction of the boiler sheets, even though two sheets connected by the bolt be disd at an angle, one to the other. i. ith this and other objects in view, the invention consists in certain novel features as hereinafter set forth and pointed out in the claim.
- My improved flexible staybolt comprises a forged or rolled out body or shank l and a rounded head 2 upset or forged on one end of said body or shank said body or shank having a contracted intermediation portion 3, from one end of which, the body or shank tapers to form a neck as at 5 which increases gradually in diameter to the rounded head :2, and from the other end of FOR BOILERS.
- the contracted intermediate portion 3 the body or shank increases gradually in diameter (forming a tapering portion 6) to the inner end portion 7 of the bolt,said inner end portion being threaded to pass through a threaded hole in the fire-box sheet.
- a bar or blank having a diameter of one inch and a quarter, more or less, is heated and the rounded head 2 is formed on one end thereof by forging in suitable dies.
- the thick portion 5 adjacent to the head is then tapered down by forging or rolling to the desired diameter forming the intermediate portion 3 of reduced diameter and the tapering portion 6 between the reduced portion 8 and the threaded inner end portion 7. which latter may be of the same diameter as that of the original bar or blank,say one inch and a quarter.
- the blank may be greater or less in diameter than above stated and that by making the inner end portion 7 greater in diameter than that of the intermediate portion 3, said end portion 7 may be reduced more or less in diameter by rolling or forging so that its threaded por ion may be adapted to holes of different sizes in the fire-box sheet.
- a flexible staybolt having a rounded head. at one end and having its other end portion threaded, said bolt having a contracted cy lindrical intermediate portion and a tapering neck portion between one end of said contracted cylindrical intermediate portion and the bolt head, the threaded portion having greater diameter than the intermediate portion, and said bolt also having a tapering port-ion between said contracted cylindrical portion and the threaded portion of the bolt.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rod-Shaped Construction Members (AREA)
Description
Jan. 12 ,1926. 1,568,981
F. K. LANDGRAF STAY BOLT FOR BOILERS Filed Sept. 14, 1921 Patented Jan. 12, 1926.
PATENT OFFICE.
FREDERICK K. LANDGRAF, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO FLAN- NERY BOLT COMPANY, OF PITTSBURGH, PENNSYLVANIA.
STAY BOLT Application filed September To (r'l Z 40/1012; 21/; may concern:
Be it known that I, l nnonnrcn K. Lannonir, a citizen of the United States, and a resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Sta-y Bolts for Boilers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.
This invention relates to improvements in staybolts for boilers and more particularly to those of the fle3ible type in which the bolt is provided with a rounded head to be movably mounted in a bearing member carried by the outer boiler sheet.
Gne object of my present invention is to so construct a staybolt of the flexible type as to economize in material forming the body or shank aortion of the bolt; so that its tire-box end shall be available for adapting the same to pass through threaded holes of difierent sizes in the fire-box sheet of the boiler construction, and so that ample clearance between the bolt and the bearing devices shall be provided, to permit free movement of the bolt during expansion and contraction of the boiler sheets, even though two sheets connected by the bolt be disd at an angle, one to the other. i. ith this and other objects in view, the invention consists in certain novel features as hereinafter set forth and pointed out in the claim.
The accompanying drawing represents an embodiment of my invention.
My improved flexible staybolt comprises a forged or rolled out body or shank l and a rounded head 2 upset or forged on one end of said body or shank said body or shank having a contracted intermediation portion 3, from one end of which, the body or shank tapers to form a neck as at 5 which increases gradually in diameter to the rounded head :2, and from the other end of FOR BOILERS.
14, 1921. Serial no. 500,644.
the contracted intermediate portion 3, the body or shank increases gradually in diameter (forming a tapering portion 6) to the inner end portion 7 of the bolt,said inner end portion being threaded to pass through a threaded hole in the fire-box sheet.
in constructing my improved bolt a bar or blank having a diameter of one inch and a quarter, more or less, is heated and the rounded head 2 is formed on one end thereof by forging in suitable dies. The thick portion 5 adjacent to the head is then tapered down by forging or rolling to the desired diameter forming the intermediate portion 3 of reduced diameter and the tapering portion 6 between the reduced portion 8 and the threaded inner end portion 7. which latter may be of the same diameter as that of the original bar or blank,say one inch and a quarter. It is evident that the blank may be greater or less in diameter than above stated and that by making the inner end portion 7 greater in diameter than that of the intermediate portion 3, said end portion 7 may be reduced more or less in diameter by rolling or forging so that its threaded por ion may be adapted to holes of different sizes in the fire-box sheet.
Having fully described my invention what I. claim as new and desire to secure by Letters-Patent, is:
A flexible staybolt having a rounded head. at one end and having its other end portion threaded, said bolt having a contracted cy lindrical intermediate portion and a tapering neck portion between one end of said contracted cylindrical intermediate portion and the bolt head, the threaded portion having greater diameter than the intermediate portion, and said bolt also having a tapering port-ion between said contracted cylindrical portion and the threaded portion of the bolt.
In testimony whereof, I have signed this specification.
FREDERICK K. LANDGRAF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US500644A US1568981A (en) | 1921-09-14 | 1921-09-14 | Stay bolt for boilers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US500644A US1568981A (en) | 1921-09-14 | 1921-09-14 | Stay bolt for boilers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1568981A true US1568981A (en) | 1926-01-12 |
Family
ID=23990325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US500644A Expired - Lifetime US1568981A (en) | 1921-09-14 | 1921-09-14 | Stay bolt for boilers |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US1568981A (en) |
-
1921
- 1921-09-14 US US500644A patent/US1568981A/en not_active Expired - Lifetime
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