US33487A - Improvement in screws - Google Patents
Improvement in screws Download PDFInfo
- Publication number
- US33487A US33487A US33487DA US33487A US 33487 A US33487 A US 33487A US 33487D A US33487D A US 33487DA US 33487 A US33487 A US 33487A
- Authority
- US
- United States
- Prior art keywords
- screw
- screws
- matrix
- improvement
- split
- 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
- 239000011159 matrix material Substances 0.000 description 5
- 206010044625 Trichorrhexis Diseases 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011122 softwood Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
- F16B39/28—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
- F16B39/30—Locking exclusively by special shape of the screw-thread
-
- 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
- Y10S411/924—Coupled nut and bolt
- Y10S411/929—Thread lock
-
- 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
- Y10S411/924—Coupled nut and bolt
- Y10S411/947—Elastic-gripping action
Definitions
- FIG. 2 showssuch a screw inserted in a matrix C
- Fig. 3 represents a modication of thev invention applicable to screws of thelarger sizes.
- the object of the invention is to iix the screw more firmly in its .matrix so that it will not ⁇ be aptto turn by the application of a slight force, noir become loose in consequence ot thev wear ot the matrix-a point of im'portance in .many cases in which screws are applied, but of obvious and paramount consequence in many machines and in some instruments of precision, such as those used for mathematical, philosophical,l and astronomical purposes.
- the nature of the invention consists in splitting the screw in one or more places in a line parallel to its length, and then imparting "an arched form to the split portion.
- a screw thus constructed when inserted in a matrix scoinpressed until the flexure of its arched des is overcome; but the elastic reaction of 4the bent metal acts like a wedge to hold the screw fixed, so that no ordiuarymotion, jar,-
- Figure l represents a screw A,split up the middle for a part ot ⁇ its length, and the split portion l so .bentas to form a double arch.
- rlhe arched form is imparted by opening the split ends and inserting a rod or mandrel of the proper size andtorni to give the degree of flexure and elasticity required, and bending the'sides over said mandrel until their ends come together, as represented. 'lhe rod is then withdrawn.
- 'lhe length of the Vslit and the curvature of the a'rch may vary with the size and length of the screw. When the screw is ver f short it may be split nearly the whole length, and in that case the split should be made at right angles to the nick'in the head of the ser-ew.
- the slit When the screw is large the slit may be onl one side ot the center, or on both sides, as shown in Fig. 3, and the strips B 1%"arched, as before described.' In this case the arches must be compressed on inserting the screw, so as to make the threads correspond.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Description
LMARSH.
SCREW.
No. 33,487.. Patented Oct. 15, 1861.
Me/55,5 ff
5 Iman/22 Aw' M UNITED STATES PATENT i OFFICE.
LEONARD MARSH, OF BURLINGTON, VERMONT'.
IMPROVEMENT IN SCREWS.
of the same, reference being had to the accompanying drawings, in which- Figure l is a view ot one of my improved.
screws. Fig. 2 showssuch a screw inserted in a matrix C, and Fig. 3 represents a modication of thev invention applicable to screws of thelarger sizes.
The object of the invention is to iix the screw more firmly in its .matrix so that it will not` be aptto turn by the application of a slight force, noir become loose in consequence ot thev wear ot the matrix-a point of im'portance in .many cases in which screws are applied, but of obvious and paramount consequence in many machines and in some instruments of precision, such as those used for mathematical, philosophical,l and astronomical purposes.
The nature of the invention consists in splitting the screw in one or more places in a line parallel to its length, and then imparting "an arched form to the split portion. A screw thus constructed when inserted in a matrix scoinpressed until the flexure of its arched des is overcome; but the elastic reaction of 4the bent metal acts like a wedge to hold the screw fixed, so that no ordiuarymotion, jar,-
or handling will cause itto start back or get loose and so produce derangement or injuryv or interfere with precision and accuracy ot` movement.
In the drawings, Figure l represents a screw A,split up the middle for a part ot` its length, and the split portion l so .bentas to form a double arch. rlhe arched form is imparted by opening the split ends and inserting a rod or mandrel of the proper size andtorni to give the degree of flexure and elasticity required, and bending the'sides over said mandrel until their ends come together, as represented. 'lhe rod is then withdrawn. 'lhe length of the Vslit and the curvature of the a'rch may vary with the size and length of the screw. When the screw is ver f short it may be split nearly the whole length, and in that case the split should be made at right angles to the nick'in the head of the ser-ew.
When the screw is large the slit may be onl one side ot the center, or on both sides, as shown in Fig. 3, and the strips B 1%"arched, as before described.' In this case the arches must be compressed on inserting the screw, so as to make the threads correspond.
Where a very strong` adhesion between the screw and its matrix is required it may be further increased to any degree by inserting iu the slitof the screw a strip of some compressible and elastic substance, as softwood, very narrow, and of a thickness proportioned to the effect desired.
Having thus fully described 'my invention, what I claiimand desire to secure by Letters Patentis- 'lhe method hereinbefore described of increasing' the adhesion between a screw and its matrix by splitting the screw and forming the-split portion into an elastic'arch,sub
. Stantially in the manner and for the purposes set forth.
The above specification signed and wit nessed this 20th day ot` April, A. D. 1861.
LEONARD MARSH'.
Publications (1)
Publication Number | Publication Date |
---|---|
US33487A true US33487A (en) | 1861-10-15 |
Family
ID=2103083
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US33487D Expired - Lifetime US33487A (en) | Improvement in screws |
Country Status (1)
Country | Link |
---|---|
US (1) | US33487A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2428783A (en) * | 1944-04-13 | 1947-10-14 | Edward J Cole | Grip bolt |
US3484084A (en) * | 1967-07-07 | 1969-12-16 | Acf Ind Inc | Carburetor idle speed control |
US4217813A (en) * | 1978-09-25 | 1980-08-19 | General Motors Corporation | Power steering gear with delashed piston nut and screw threading |
US20030027196A1 (en) * | 2001-08-02 | 2003-02-06 | Barnes Wayne M. | Magnesium precipitate methods for magnesium dependent enzymes |
US20070147973A1 (en) * | 2005-12-22 | 2007-06-28 | Cyril Laan | Dual threaded screw for composite materials |
US7465135B2 (en) | 2003-11-14 | 2008-12-16 | Maclean-Fogg Company | U-Nut fastening assembly |
US8011866B2 (en) | 2001-08-20 | 2011-09-06 | Maclean-Fogg Company | Locking fastener assembly |
-
0
- US US33487D patent/US33487A/en not_active Expired - Lifetime
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2428783A (en) * | 1944-04-13 | 1947-10-14 | Edward J Cole | Grip bolt |
US3484084A (en) * | 1967-07-07 | 1969-12-16 | Acf Ind Inc | Carburetor idle speed control |
US4217813A (en) * | 1978-09-25 | 1980-08-19 | General Motors Corporation | Power steering gear with delashed piston nut and screw threading |
US20030027196A1 (en) * | 2001-08-02 | 2003-02-06 | Barnes Wayne M. | Magnesium precipitate methods for magnesium dependent enzymes |
US8011866B2 (en) | 2001-08-20 | 2011-09-06 | Maclean-Fogg Company | Locking fastener assembly |
US7465135B2 (en) | 2003-11-14 | 2008-12-16 | Maclean-Fogg Company | U-Nut fastening assembly |
US20070147973A1 (en) * | 2005-12-22 | 2007-06-28 | Cyril Laan | Dual threaded screw for composite materials |
US7255523B2 (en) * | 2005-12-22 | 2007-08-14 | Prime Source Building Products, Inc. | Dual threaded screw for composite materials |
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