New! Search for patents from more than 100 countries including Australia, Brazil, Sweden and more

US4704A - Improvement in wood-screws - Google Patents

Improvement in wood-screws Download PDF

Info

Publication number
US4704A
US4704A US4704A US 4704 A US4704 A US 4704A US 4704 A US4704 A US 4704A
Authority
US
United States
Prior art keywords
wood
screw
screws
point
improvement
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
Publication date

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS, WEDGES, JOINTS OR JOINTING
    • F16B25/00Screws that cut thread in the body into which they are screwed, e.g. wood screws

Description

,UNITED STATES PATENT OFFICE.

THOMAS J. SLOAN, OF NEW YORK, N. Y.

IMPROVEMENT IN WOOD-SCREWS.

Speciiication forming part of Letters Patent N o. 4,704, dated August 20, 1846.

To aZZ whom it may concern,.-

Be it known that I, THOMAS J. SLOAN, of the city, county, and State of New York, have invented an Improved Wood-Screw, which I denominate the threaded conical-point Woodscrew; and I do hereby declare that the following is a full, clear, and exact description of the principle or character which distinguishes it from all other things before known, and of the manner of making, constructing, and

using the same, reference being had to the.

accompanying drawings, making part of this specification, in whichm Figure l is the perfect screw. Fig. 2 is the core of the screw with the thread removed to show its form.

Screws have heretofore been formed gradually tapering at the core from Where the thread starts to the end by dressing the thread at each turn, and tapering screws have also been formed; but they have been found not to hold as well as those of common construction by reason of the taper of the main part of the core; but the nature of my improved screw consists in forming on a screw of the ordinary shape a conical point and extending the thread of the screw with the saine pitch, but gradually diminishing in width to the end of said point, by which means the screw can be entered into the Wood Without boring, unless the wood is very hard, in which case it -follows better, works straight, and holds more firmly than any other heretofore made. The screw is formed by any machinery that will make a perfect thread, which is cut into the blank of ordinary make, and when it reaches the full depth it runs down to near the point, shaping the core cylindrical, as shown in Fig. 2 at a. The cutters then form the point of the core conical, as shown at b, Fig. 2, and at the same time cut a thread on it of the same pitch as .that on the body of the screw, and gradually diminishing it in depth to the extreme point, Where it terminatesas represented at Fig. l.

What I claim as my invention, and desire to secure by Letters Patent, is-v Forming on a Wood-screw of ordinary shape a conical threaded. point, substantially as herein described, the thread on said point being gradually diminished to the end, as

aboveset forth.

THOS. J. SLOAN. Witnesses:

A. P. BROWNE, WM. H. BrsHoP.

Family

ID=

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2787186A (en) * 1952-03-28 1957-04-02 Brogiotti Antonin Screw spike with compression producing thread form
US20090327275A1 (en) * 2008-06-30 2009-12-31 Yahoo! Inc. Automated system and method for creating a content-rich site based on an emerging subject of internet search
US20100082576A1 (en) * 2008-09-25 2010-04-01 Walker Hubert M Associating objects in databases by rate-based tagging
US20100082575A1 (en) * 2008-09-25 2010-04-01 Walker Hubert M Automated tagging of objects in databases

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2787186A (en) * 1952-03-28 1957-04-02 Brogiotti Antonin Screw spike with compression producing thread form
US20090327275A1 (en) * 2008-06-30 2009-12-31 Yahoo! Inc. Automated system and method for creating a content-rich site based on an emerging subject of internet search
US20100082576A1 (en) * 2008-09-25 2010-04-01 Walker Hubert M Associating objects in databases by rate-based tagging
US20100082575A1 (en) * 2008-09-25 2010-04-01 Walker Hubert M Automated tagging of objects in databases

Similar Documents

Publication Publication Date Title
US3233500A (en) Screw with main shank threads of a given pitch merging with threads of unlike pitch on a tapered bottom end of the screw shank
US2293930A (en) Screw
US1151861A (en) Countersinking screw-head.
US1677269A (en) Nonremovable nut
US1264519A (en) Ring-mandrel.
US137414A (en) Improvement in wood-screws
US1238636A (en) Screw.
US612316A (en) James f
US23409A (en) Improved manufacture of wood-screws
US4028987A (en) Self-drilling screws
US2046837A (en) Means for uniting a screw with a driver
US126366A (en) Improvement in wood-screws
US1891895A (en) Drive screw
US2807813A (en) Fluteless swaging taps
US1987474A (en) Screw
US3079831A (en) Screw having workpiece drilling and thread cutting point
US197933A (en) Improvement in wood-screws
US363522A (en) Crank for velocipedes
US471179A (en) Wood-screw
US430236A (en) Island
US1204956A (en) Bridging for joists.
US684774A (en) Screw.
US635297A (en) Screw.
US3282145A (en) Screw socket having tangential keyways
US45133A (en) Improvement in screws