US1674258A - Insulated screw - Google Patents

Insulated screw Download PDF

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Publication number
US1674258A
US1674258A US39213A US3921325A US1674258A US 1674258 A US1674258 A US 1674258A US 39213 A US39213 A US 39213A US 3921325 A US3921325 A US 3921325A US 1674258 A US1674258 A US 1674258A
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United States
Prior art keywords
screw
shank
head
insulating
sleeve
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
US39213A
Inventor
Herbert F Obergfell
Erickson John
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.)
Automatic Electric Inc
Original Assignee
Automatic Electric Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Automatic Electric Inc filed Critical Automatic Electric Inc
Priority to US39213A priority Critical patent/US1674258A/en
Application granted granted Critical
Publication of US1674258A publication Critical patent/US1674258A/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
    • F16B33/00—Features common to bolt and nut
    • F16B33/004—Sealing; Insulation
    • 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
    • Y10S411/00—Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener
    • Y10S411/90—Fastener or fastener element composed of plural different materials
    • Y10S411/901—Core and exterior of different materials
    • Y10S411/902—Metal core

Definitions

  • HERBERT l GBERGFELII 0F 31V ER 'EQRIEST, AND EDEN ERICKSON, OF CHICAGO, IUZL hlOIS, ASSIGNORS, BY MESNE ASSIGNMENTS, TO AUTOMATIC ELECTREG GHEGAGG, ELLINOIS, A GGBPGRAEEON 01* DELAVTARE.
  • This invention relates in general to insu lated screws, and has for its principal object the provision of an insulated screw in which the insulator and screw are fastened together and may be handled. as an ordinary screw.
  • Another object of our invention is to provide a metal washer attached to a screw and insulated from it.
  • A. further object of our invention is to provide an insulated screw in which the insulating assembly is held adjacent to the screw head.
  • a still further object is to provide an insulated screw of the character set forth in the preceding objects in which the washer and insulating assembly turn fully on the screw.
  • l igs l and 2 show respectively the completed assembled screw, and the sectional details of its construction
  • Fig, 3 shows an exploded view oi the arts 0:6 the screw.
  • Fig. 1 shows an oval nllister head machine screw equipped with an insulating member built in accordance with the object of this invention.
  • Figure 2 shows the construction details of this screw.
  • l/Ve have taken a ll. S. standard oval iillister head machine screw 1 and turned down a shank 8 directly beneath the head, the diameter of the shank being approximately the root diameter or the screw thread.
  • an insulating collar l which is made oi semiflexible material, such as fiber, hard rubber, or balielite composition and which is slit to permit its being slipped over the shank, @ver this insulating sleeve and adjacent to the head or" the screw, we have placed an insulat ing washer 2, which may be made of fiber,
  • the sleeve and washer are held on the screw by means of the eyelet 3, which is pressed on over the collar i and up against the washer 2.
  • This collar 3 is not tight enough to bind the insulating sleeve 4 to the shank 8 of the machine screw, but rather leaves the sleeve free to slide over the shank, so that the screw can be tightened without turning the insulator assembly.
  • the member 5 which is being held on the mounting plate '7 by the screw 1, is insulated therefrom by the insulating strip 5g 6 and washer assembly of the screw.
  • a screw having a threaded portion, a head, and a shank adjacent to said head the diameter of said shank being approximately the root diameter of said threads, an insulating sleeve placed around said shank an insulating washer around said sleeve and adjacent to said head, a metal eyelet over said sleeve and washer, said eyelet, threads and head cooperating to hold said insulating members on said screw adjacent to said head, said insulating assembly being rotatable around said shank.
  • An article of manufacture comprising a I screw having a head, a shank adjacent thereto, and a threaded portion, the diameter of the shank being approximately the root diameter of said threaded portion, an insulattion assembly comprising an insulating sleeve fitting around said shank and an insulating washer fitting over said sleeve and against said screwhead, and means comprising an eyelet forced over said sleeve and against said washer for holding said screw and insulator assembl to ether as a unit.

Description

June 19, 1928. 1,674,258
H. F. OBERGFELL ErAL INSULATED SCREW Filed June 24, 1925 HUN Imqqsnlnr H 7 HEIZJETI F Ubergmbzni-Juhn LIICKSEF.
Fill
Patented June 19, 1928 lTE *t'i r re ns,
HERBERT l GBERGFELII, 0F 31V ER 'EQRIEST, AND EDEN ERICKSON, OF CHICAGO, IUZL hlOIS, ASSIGNORS, BY MESNE ASSIGNMENTS, TO AUTOMATIC ELECTREG GHEGAGG, ELLINOIS, A GGBPGRAEEON 01* DELAVTARE.
ENG, 01?
dedication filed June as, 1925. serial No. 39,213.
This invention relates in general to insu lated screws, and has for its principal object the provision of an insulated screw in which the insulator and screw are fastened together and may be handled. as an ordinary screw.
Another object of our invention is to provide a metal washer attached to a screw and insulated from it.
A. further object of our invention is to provide an insulated screw in which the insulating assembly is held adjacent to the screw head.
A still further object is to provide an insulated screw of the character set forth in the preceding objects in which the washer and insulating assembly turn fully on the screw.
in the drawings, l igs l and 2 show respectively the completed assembled screw, and the sectional details of its construction, and Fig, 3 shows an exploded view oi the arts 0:6 the screw. Fig. 1 shows an oval nllister head machine screw equipped with an insulating member built in accordance with the object of this invention.
Figure 2 shows the construction details of this screw. l/Ve have taken a ll. S. standard oval iillister head machine screw 1 and turned down a shank 8 directly beneath the head, the diameter of the shank being approximately the root diameter or the screw thread. Around this shank we have fitted an insulating collar l, which is made oi semiflexible material, such as fiber, hard rubber, or balielite composition and which is slit to permit its being slipped over the shank, @ver this insulating sleeve and adjacent to the head or" the screw, we have placed an insulat ing washer 2, which may be made of fiber,
hard rubber, or bakelite composition. The sleeve and washer are held on the screw by means of the eyelet 3, which is pressed on over the collar i and up against the washer 2.
c This collar 3, is not tight enough to bind the insulating sleeve 4 to the shank 8 of the machine screw, but rather leaves the sleeve free to slide over the shank, so that the screw can be tightened without turning the insulator assembly. The member 5 which is being held on the mounting plate '7 by the screw 1, is insulated therefrom by the insulating strip 5g 6 and washer assembly of the screw.
The utility of such a screw as we have designed lies principally in the mounting of electrical equipment, when it is expedient to solidly attach such equipment to suitable base and at the same time to insulate it therefrom.
While we have shown and described a particular form of insulated screw made in accordance with the obfiect or" our invention, we have done so merely by way of example and do not wish to limit ourselves to the specific disclosure of the drawings and specification. The principal of insulating screws in the manner we have, can be applied to a large variety or machine screws, bolts, and wood screws,
Having thus described our invention what we consider new and desire to have protected by Letters Patent is pointed out in the appended claims.
What is claimed is:
1. A screwhavin a threaded portion, a head, and a shank adjacent to said head, the diameter of said shank being approximately the root diameter of said threads, an insulat= ing sleeve placed around said shank, an insu lating washer around said sleeve and adjacent to said head, a metal eyelet over said sleeve and washer, said eyelet, threads and head cooperating to hold said insulating members on said screw adjacent to said head,
2. A screw having a threaded portion, a head, and a shank adjacent to said head the diameter of said shank being approximately the root diameter of said threads, an insulating sleeve placed around said shank an insulating washer around said sleeve and adjacent to said head, a metal eyelet over said sleeve and washer, said eyelet, threads and head cooperating to hold said insulating members on said screw adjacent to said head, said insulating assembly being rotatable around said shank.
3. An article of manufacture comprising a I screw having a head, a shank adjacent thereto, and a threaded portion, the diameter of the shank being approximately the root diameter of said threaded portion, an insulattion assembly comprising an insulating sleeve fitting around said shank and an insulating washer fitting over said sleeve and against said screwhead, and means comprising an eyelet forced over said sleeve and against said washer for holding said screw and insulator assembl to ether as a unit.
In witness whereo I ereunto subscribe my name this 17th day of June, A. D; 1925.
HERBERT F. OBERGFELL. In witness whereof, I hereunto subscribe my name this 17th day of June, A. D. 1925.
, i JOHN ERICKSON.
US39213A 1925-06-24 1925-06-24 Insulated screw Expired - Lifetime US1674258A (en)

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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2600278A (en) * 1945-08-02 1952-06-10 Louis D Smullin Variable capacity cavity tuning
US2678585A (en) * 1949-12-30 1954-05-18 American Optical Corp Ophthalmic mounting
US3042744A (en) * 1958-11-03 1962-07-03 Endevco Corp Testing system and insulated mounting therefor
US3078334A (en) * 1959-07-20 1963-02-19 Formar Ind Inc Insert molded plastic self tapping fastener
US3296694A (en) * 1964-03-05 1967-01-10 Gen Motors Corp Method of fabricating a fastener unit
US3500620A (en) * 1967-05-05 1970-03-17 Black & Decker Mfg Co Electric lawnmower construction
US4238165A (en) * 1979-01-25 1980-12-09 Illinois Tool Works Inc. Fastener unit for clamping plastic workpieces
US4760493A (en) * 1985-09-30 1988-07-26 The Boeing Company Lightning protection system for composite material aircraft structures
US5489177A (en) * 1994-06-08 1996-02-06 Crest Products, Inc. Fastener assembly with axially captivated washer
US5807051A (en) * 1995-09-18 1998-09-15 United Industries Corporation Dielectric adhesive insert anchor
DE19824068A1 (en) * 1998-05-29 1999-12-16 Webasto Karosseriesysteme Electrically insulating screw connection to join two workpieces, e.g. for fixing electric drive to frame of vehicle sunroof
US20050220564A1 (en) * 2004-04-01 2005-10-06 Hinson Kerry D Fastener assembly with wave spring
US20100249869A1 (en) * 2009-03-24 2010-09-30 Medtronic, Inc. Lead Retention and Sealing Device
US20100249871A1 (en) * 2009-03-24 2010-09-30 Medtronic, Inc. Full Visibility Lead Retention
US20100249870A1 (en) * 2009-03-24 2010-09-30 Medtronic, Inc. Sealing Setscrew
US10253801B2 (en) 2015-09-29 2019-04-09 Simpson Strong-Tie Company Inc. Washer with shear tube

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2600278A (en) * 1945-08-02 1952-06-10 Louis D Smullin Variable capacity cavity tuning
US2678585A (en) * 1949-12-30 1954-05-18 American Optical Corp Ophthalmic mounting
US3042744A (en) * 1958-11-03 1962-07-03 Endevco Corp Testing system and insulated mounting therefor
US3078334A (en) * 1959-07-20 1963-02-19 Formar Ind Inc Insert molded plastic self tapping fastener
US3296694A (en) * 1964-03-05 1967-01-10 Gen Motors Corp Method of fabricating a fastener unit
US3500620A (en) * 1967-05-05 1970-03-17 Black & Decker Mfg Co Electric lawnmower construction
US4238165A (en) * 1979-01-25 1980-12-09 Illinois Tool Works Inc. Fastener unit for clamping plastic workpieces
US4760493A (en) * 1985-09-30 1988-07-26 The Boeing Company Lightning protection system for composite material aircraft structures
US5489177A (en) * 1994-06-08 1996-02-06 Crest Products, Inc. Fastener assembly with axially captivated washer
US5711711A (en) * 1994-06-08 1998-01-27 Crest Products, Inc. Method of manufacturing a fastener assembly with axially captivated washer
US5807051A (en) * 1995-09-18 1998-09-15 United Industries Corporation Dielectric adhesive insert anchor
DE19824068A1 (en) * 1998-05-29 1999-12-16 Webasto Karosseriesysteme Electrically insulating screw connection to join two workpieces, e.g. for fixing electric drive to frame of vehicle sunroof
US20050220564A1 (en) * 2004-04-01 2005-10-06 Hinson Kerry D Fastener assembly with wave spring
US20100249869A1 (en) * 2009-03-24 2010-09-30 Medtronic, Inc. Lead Retention and Sealing Device
US20100249871A1 (en) * 2009-03-24 2010-09-30 Medtronic, Inc. Full Visibility Lead Retention
US20100249870A1 (en) * 2009-03-24 2010-09-30 Medtronic, Inc. Sealing Setscrew
US8032221B2 (en) 2009-03-24 2011-10-04 Medtronic, Inc. Sealing setscrew
US8190260B2 (en) 2009-03-24 2012-05-29 Medtronic, Inc. Lead retention and sealing device
US10253801B2 (en) 2015-09-29 2019-04-09 Simpson Strong-Tie Company Inc. Washer with shear tube
US11137016B2 (en) 2015-09-29 2021-10-05 Simpson Strong-Tie Company, Inc. Washer with shear tube

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