US38141A - Improvement in screws - Google Patents
Improvement in screws Download PDFInfo
- Publication number
- US38141A US38141A US38141DA US38141A US 38141 A US38141 A US 38141A US 38141D A US38141D A US 38141DA US 38141 A US38141 A US 38141A
- Authority
- US
- United States
- Prior art keywords
- screw
- screws
- slot
- improvement
- driver
- 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
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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
- F16B23/00—Specially shaped nuts or heads of bolts or screws for rotations by a tool
- F16B23/0007—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool
- F16B23/0015—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool substantially rectangular, e.g. one-slot head
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- 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
- Y10S411/919—Screw having driving contacts
Definitions
- This invention consists in the arrangement of a dovetailed slot in the head of a screw in such a manner that the edges ot' said slot at'-, ford a good and iirln hold to the screw-driver,
- This slot may be cut by means of two saws set at a slight angle, or by any other suitable device, and when properly eut it presents two sharp edges, b, which aiford a good hold tothe screw-driver, and which are not liable to wear away so as to render the screw useless.
- a screw, A with a dovetailed slot, a, as and for the purpose set forth.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finger-Pressure Massage (AREA)
- Massaging Devices (AREA)
- Orthopedics, Nursing, And Contraception (AREA)
Description
.` v UNITED STATES PATENT OFFICE.
J. A. AYRES, oF HARTFORD, CONNECTICUT.
I' `IMPROVEMENT IN SCREWS.
Specification forming part of Letters Patent N o. 38,141, dated April 14, 1863.
To all whom it may concern Be it known that I, J. A. AYRES, of Hartford, in the county of Hartford and State of Connecticut, have 'invented a new and useful Improvement in Screws and I do hereby declare that the following is a full, clear, and exact description of the saine, reference being had to the accompanying drawings, forming a part of this specification, in which- Figure 1 represents a side elevation ot my invention. Fig. 2 is a longitudinal central section of the same.
Similar letters ot' reference in both views indicate corresponding` parts.
This invention consists in the arrangement of a dovetailed slot in the head of a screw in such a manner that the edges ot' said slot at'-, ford a good and iirln hold to the screw-driver,
' and that said slot is not liable to wear out and let the screw-driver slip.
'Io enable those skilled in the art to make and use my invention, I will proceed to describe it with reference to the drawings.
The slots in ordinary screws are made with parallel sides, and lif the screw-driver is inserted the edges of said slot are soon rounded olil and the screw-driver is liable to slip, and
dered useless. It is, however, more particu larly the annoyance occasioned by the slipping of the screwdriver in the slots of ordinary screws which I have endeavored to obviate by my invention.
The sides of the slot a of my screw Aare inclined inwardly, so that a cross-section or end view of the slot presents the shape of adovetail,
as clearly shown in the drawings. This slot may be cut by means of two saws set at a slight angle, or by any other suitable device, and when properly eut it presents two sharp edges, b, which aiford a good hold tothe screw-driver, and which are not liable to wear away so as to render the screw useless.
It is obvious that this improvement is applicable to screws of any size and shape, the heads ot' which are. provided with a slot, and wherever applied it will be found that the annoyanee occasioned by the slipping of the screw-driver in the slots of ordinary screws is completely obviated by this apparently sim-I ple invention. r
Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-
A screw, A, with a dovetailed slot, a, as and for the purpose set forth.
J. A. AYRES.
Witnesses:
CHARLES WHITrLEsEY, J. W. OooMBs.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US38141A true US38141A (en) | 1863-04-14 |
Family
ID=2107714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US38141D Expired - Lifetime US38141A (en) | Improvement in screws |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US38141A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4538486A (en) * | 1982-11-22 | 1985-09-03 | Jacques Lutrat | Non-slip screw |
| US20030125745A1 (en) * | 2001-11-05 | 2003-07-03 | Bio One Tech Inc. | Bone-fixing device |
| WO2005025458A1 (en) | 2003-09-08 | 2005-03-24 | Boston Scientific Limited | Rotating expandable balloon and sheath for stent delivery to bifurcated vessel |
| US10926384B2 (en) * | 2017-04-25 | 2021-02-23 | William Norton | Fastener compatible with helical toothed driver |
-
0
- US US38141D patent/US38141A/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4538486A (en) * | 1982-11-22 | 1985-09-03 | Jacques Lutrat | Non-slip screw |
| US20030125745A1 (en) * | 2001-11-05 | 2003-07-03 | Bio One Tech Inc. | Bone-fixing device |
| WO2005025458A1 (en) | 2003-09-08 | 2005-03-24 | Boston Scientific Limited | Rotating expandable balloon and sheath for stent delivery to bifurcated vessel |
| US10926384B2 (en) * | 2017-04-25 | 2021-02-23 | William Norton | Fastener compatible with helical toothed driver |
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