US1532736A - Stay bolt for boilers - Google Patents

Stay bolt for boilers Download PDF

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Publication number
US1532736A
US1532736A US621382A US62138223A US1532736A US 1532736 A US1532736 A US 1532736A US 621382 A US621382 A US 621382A US 62138223 A US62138223 A US 62138223A US 1532736 A US1532736 A US 1532736A
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United States
Prior art keywords
bolt
inner end
rod
telltale hole
boilers
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
US621382A
Inventor
Ethan I Dodds
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Flannery Bolt Co
Original Assignee
Flannery Bolt Co
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Filing date
Publication date
Application filed by Flannery Bolt Co filed Critical Flannery Bolt Co
Priority to US621382A priority Critical patent/US1532736A/en
Application granted granted Critical
Publication of US1532736A publication Critical patent/US1532736A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B31/00—Screwed connections specially modified in view of tensile load; Break-bolts
    • F16B31/02—Screwed connections specially modified in view of tensile load; Break-bolts for indicating the attainment of a particular tensile load or limiting tensile load
    • F16B31/025—Screwed connections specially modified in view of tensile load; Break-bolts for indicating the attainment of a particular tensile load or limiting tensile load with a gauge pin in a longitudinal bore in the body of the bolt
    • 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 means to facilitate the testing of the bolt,--one object of the invention being to provide simple means in a staybolt whereby, upon inspection, it may be definitely determined whether the bolt is broken.
  • Figure 1 is a view in section showing a staybolt and illustrating an embodiment of my invention
  • FIGS 2 and 3 are detail views.
  • the inner or fire-box sheet of a boiler is indicated at 1 and provided with a hole through which the threaded inner end portion 2 of a staybolt 3 passes, the inner end of said staybolt being upset as at 4 against the inner face of the sheet 1.
  • the staybolt 3 is provided at its outer end with a head 5 which may be rounded and a telltale hole 6 extends from the inner end of the bolt,
  • a breakable rod 7, preferably consisting of wire approximately one-sixteenth of an inch in diameter is located within the telltale hole 6 and is connected with the bolt at respective ends of said hole.
  • the rod or wire 7 is preferably screw threaded and the means which connects it with the bolt at the outer end of the telltale hole within the bolt head 5, may consist of a slug or sleeve 8 of soft metal such as Babbitt metal, zinc, lead or other metal which is capable of being more or less readily compressed.
  • the soft metal slug 8 will first be applied to one end of the rod or wire 7 and then inserted into the telltale hole with said rod.
  • a tube may then be inserted into the telltale hole and caused to bear against the inner end of Serial No. 621,382.
  • a conical plug 9 which may be of copper is inserted into the conical inner end portion of the telltale hole and this plug is made with a threaded socket portion 10 to screw onto the inner end portion of the rod or wire 7 and thus connect the inner end portion of the latter with the inner end portion of the bolt.
  • the plug 9 may be provided in its larger end with a slot 11 to receive a screw driver.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Hair Curling (AREA)

Description

E. l. DODDS STAY BOLT FOR BOILERS ,April 7, 1925.
Filed Feb 26.
Patented Apr. 7, 1925.
' 1 m s ar Es rare-NT lorries.
ETHAN I. norms, or. CENTRAL VALLEY, new YORK, lemma To ELANNE RY oLT 'coiviramnor PITTSBURGH, esnnsynvxmn STAY BOLT Fo'n BOILERS.
Application filed February 26, 1923.
T 0 all whom it may concern:
Be it known that I, ETI-IAN I. Donns, a citizen of the United States, and a resident of Central Valley, in the county of Orange and State of New York, have invented certain new and useful Improvements in Stay 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 inthe art to which it appertains to make and use the same.
This invention relates to improvements in staybolts for boilers and more particularly to means to facilitate the testing of the bolt,--one object of the invention being to provide simple means in a staybolt whereby, upon inspection, it may be definitely determined whether the bolt is broken.
With this object in view, the invention consists in certain novel features as hereinafter set forth and pointed out in the claims.
In the accompanying drawings,
Figure 1 is a view in section showing a staybolt and illustrating an embodiment of my invention, and
Figures 2 and 3 are detail views.
The inner or fire-box sheet of a boiler is indicated at 1 and provided with a hole through which the threaded inner end portion 2 of a staybolt 3 passes, the inner end of said staybolt being upset as at 4 against the inner face of the sheet 1. The staybolt 3 is provided at its outer end with a head 5 which may be rounded and a telltale hole 6 extends from the inner end of the bolt,
through the body portion thereon and terminates within the head 5.
A breakable rod 7, preferably consisting of wire approximately one-sixteenth of an inch in diameter is located within the telltale hole 6 and is connected with the bolt at respective ends of said hole. The rod or wire 7 is preferably screw threaded and the means which connects it with the bolt at the outer end of the telltale hole within the bolt head 5, may consist of a slug or sleeve 8 of soft metal such as Babbitt metal, zinc, lead or other metal which is capable of being more or less readily compressed. The soft metal slug 8 will first be applied to one end of the rod or wire 7 and then inserted into the telltale hole with said rod. A tube may then be inserted into the telltale hole and caused to bear against the inner end of Serial No. 621,382.
said soft metal slug. Pressure applied to the inner end of the tube will cause the slug to be compressed and therefore to tightly bind on the threaded rod or wire and also against the wall of the telltale hole near the outer end of the latter and thus the rod or wire will be efiectually connected with the staybolt at or near the outer end of the telltale-hole.
A conical plug 9 which may be of copper is inserted into the conical inner end portion of the telltale hole and this plug is made with a threaded socket portion 10 to screw onto the inner end portion of the rod or wire 7 and thus connect the inner end portion of the latter with the inner end portion of the bolt. The plug 9 may be provided in its larger end with a slot 11 to receive a screw driver.
With my improvements, should the bolt become broken, the rod or wire (being connected at both of its ends with the staybolt) will also become broken. If, upon removing the plug 9, a portion of the rod would be removed with it, the inspector would know at once that the bolt is broken and must be replaced by a new bolt. Should the bolt become sufficiently ruptured to permit the admission of water into the telltale hole, the hydraulic test of the bolt would cause such water to be forced past the removable plug 9 and thus indicate that the bolt is fractured.
Having fully described my invention what I claim as new and desire to secure by Letters-Patent, is:
1. The combination with a staybolt hav- 7 ing a telltale hole extending from its inner end approximately to but not through the outer end of the bolt, of an indicating rod located in said telltale hole and connected at its ends respectively to the bolt near respective ends of said telltale hole.
2. The combination with a staybolt having a telltale hole extending from its inner end approximately to but not through the outer end of the bolt, of an indicating rod located in said telltale hole, a soft metal member connecting said rod withthe stayb-olt approximately at the outer end of the telltale hole, and a removable plug in the inner end portion of the telltale hole and connecting the inner end portion of said rod with the inner end portion of the staybolt.
3. The combination with a staybolt having atelltale hole extending from the inner end thereof approximately to but not through the outer end of said bolt of a threaded rod located in said telltale hole, a soft metal member engaging said rod and pressed into the outer end portion of the telltale hole, and a removable plug threaded on the inner end portion of said rod and located Within the inner end portion of the telltale hole. 10 In testimony whereof, I have signed this specification in the presence of a subscribing Witness.
ETHAN I. DODDS. Witness:
\VARREN M. GILDERSLEEVE.
US621382A 1923-02-26 1923-02-26 Stay bolt for boilers Expired - Lifetime US1532736A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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US621382A US1532736A (en) 1923-02-26 1923-02-26 Stay bolt for boilers

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2747454A (en) * 1952-01-18 1956-05-29 Charles F Bowersett Bolt with frangible, ejectable tension indicating means
FR2517387A1 (en) * 1981-11-30 1983-06-03 Westinghouse Electric Corp FIXING STRUCTURE, ESPECIALLY FOR A NUCLEAR REACTOR
IL259210A (en) * 2017-06-29 2018-06-28 Insitu Inc Frangible fasteners with flexible connectors for unmanned aircraft, and associated systems and methods
US10399674B2 (en) 2014-07-28 2019-09-03 Insitu, Inc. Systems and methods countering an unmanned air vehicle
US10407181B2 (en) 2016-06-27 2019-09-10 Insitu, Inc. Locking line capture devices for unmanned aircraft, and associated systems and methods
US10513350B1 (en) 2014-11-20 2019-12-24 Insitu, Inc. Capture devices for unmanned aerial, vehicles, including track-borne capture lines, and associated systems and methods
US10843817B2 (en) 2009-04-24 2020-11-24 Insitu, Inc. Systems and methods for recovering and controlling post-recovery motion of unmanned aircraft
US10933997B2 (en) 2015-10-02 2021-03-02 Insitu, Inc. Aerial launch and/or recovery for unmanned aircraft, and associated systems and methods
US10981671B2 (en) 2010-09-27 2021-04-20 Insitu, Inc. Line capture devices for unmanned aircraft, and associated systems and methods
US11066185B2 (en) 2018-05-04 2021-07-20 Insitu, Inc. Launch and/or recovery for unmanned aircraft and/or other payloads, including via parachute-assist, and associated systems and methods
US11142339B2 (en) 2018-05-04 2021-10-12 Insitu, Inc. Launch and/or recovery for unmanned aircraft and/or other payloads, including via parachute-assist, and associated systems and methods

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2747454A (en) * 1952-01-18 1956-05-29 Charles F Bowersett Bolt with frangible, ejectable tension indicating means
FR2517387A1 (en) * 1981-11-30 1983-06-03 Westinghouse Electric Corp FIXING STRUCTURE, ESPECIALLY FOR A NUCLEAR REACTOR
US10843817B2 (en) 2009-04-24 2020-11-24 Insitu, Inc. Systems and methods for recovering and controlling post-recovery motion of unmanned aircraft
US10981671B2 (en) 2010-09-27 2021-04-20 Insitu, Inc. Line capture devices for unmanned aircraft, and associated systems and methods
US11161610B2 (en) 2014-07-28 2021-11-02 Insitu, Inc. Systems and methods for countering an unmanned air vehicle
US10399674B2 (en) 2014-07-28 2019-09-03 Insitu, Inc. Systems and methods countering an unmanned air vehicle
US11053024B2 (en) 2014-11-20 2021-07-06 Insitu, Inc. Capture devices for unmanned aerial vehicles, including track-borne capture lines, and associated systems and methods
US10513350B1 (en) 2014-11-20 2019-12-24 Insitu, Inc. Capture devices for unmanned aerial, vehicles, including track-borne capture lines, and associated systems and methods
US10933997B2 (en) 2015-10-02 2021-03-02 Insitu, Inc. Aerial launch and/or recovery for unmanned aircraft, and associated systems and methods
US11858631B2 (en) 2015-10-02 2024-01-02 Insitu, Inc. Aerial launch and/or recovery for unmanned aircraft with submersible devices, and associated systems and methods
US10407181B2 (en) 2016-06-27 2019-09-10 Insitu, Inc. Locking line capture devices for unmanned aircraft, and associated systems and methods
US10967987B2 (en) 2016-06-27 2021-04-06 Insitu, Inc. Locking line capture devices for unmanned aircraft, and associated systems and methods
US10767682B2 (en) 2017-06-29 2020-09-08 Insitu, Inc. Frangible fasteners with flexible connectors for unmanned aircraft, and associated systems and methods
CN109204774A (en) * 2017-06-29 2019-01-15 英西图公司 Frangible fastener and related system and method for unmanned vehicle with flexible connecting member
EP3421362A1 (en) * 2017-06-29 2019-01-02 Insitu, Inc. Frangible fasteners with flexible connectors for unmanned aircraft, and associated systems and methods
IL259210A (en) * 2017-06-29 2018-06-28 Insitu Inc Frangible fasteners with flexible connectors for unmanned aircraft, and associated systems and methods
AU2018201943B2 (en) * 2017-06-29 2023-10-26 Insitu, Inc. Frangible fasteners with flexible connectors for unmanned aircraft, and associated systems and methods
US11066185B2 (en) 2018-05-04 2021-07-20 Insitu, Inc. Launch and/or recovery for unmanned aircraft and/or other payloads, including via parachute-assist, and associated systems and methods
US11142339B2 (en) 2018-05-04 2021-10-12 Insitu, Inc. Launch and/or recovery for unmanned aircraft and/or other payloads, including via parachute-assist, and associated systems and methods
US11603216B2 (en) 2018-05-04 2023-03-14 Insitu, Inc. Launch and/or recovery for unmanned aircraft and/or other payloads, including via parachute-assist, and associated systems and methods
US12071260B2 (en) 2018-05-04 2024-08-27 Insitu, Inc. Launch and/or recovery for unmanned aircraft and/or other payloads, including via parachute-assist, and associated systems and methods

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