US161390A - Allan cummings - Google Patents

Allan cummings Download PDF

Info

Publication number
US161390A
US161390A US161390DA US161390A US 161390 A US161390 A US 161390A US 161390D A US161390D A US 161390DA US 161390 A US161390 A US 161390A
Authority
US
United States
Prior art keywords
screw
slot
allan
cavity
screws
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
Application granted granted Critical
Publication of US161390A publication Critical patent/US161390A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F16B23/00Specially shaped nuts or heads of bolts or screws for rotations by a tool
    • F16B23/0007Specially 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
    • F16B23/0015Specially 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
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S411/00Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener
    • Y10S411/919Screw having driving contacts

Description

ALLAN CUMMIN GS, OF NEW' YOR. Y.

IMPROVEMENT IN WOD-SCRWS.

Specification forming part of Letters Patent No. 16] ,390, dated March 30, 1875; application iiled February l5, 1875.

To all whom it may concern:

Be it known that I, ALLAN GUMMINGS, of the city, county, and State of N ew York, have invented an Improvement in Screws, of which the following is a specification:

The object of my invention is to provide a screw so constructed that it may readily be inserted and driven home by the screw-driver with great rapidity and safety, without any danger of injuring the slot or head of the screw by the slipping of the screw-driver. In order to accomplish this purpose I form in the center of the head of the screw a cavity of suitable shape and depth, into which a properly-shaped screw-driveris inserted; or I combine both the cavity and usual slot, and

' usean 'ordinary screw-driver, provided with a 'projecting spur to it into the cavity.

In the drawings, which form a part of this specification, Figure l is an elevation, partially in section, of an ordinary wood-screw having a rounded head, and showing the application of my invention combined with the usual slot. Fig. 2 is an elevation, partially in section, of an ordinary screw, from the head of which the usual slot is omitted. Figs. 3 and 4 are plan views of the same, and Fig. 5 is a modification.

It is well known that the ordinary screwhead, provided with a slot, is very susceptible to injury, caused mainly by the slipping of the screw-driver from the slot when the screw is being set home77 in wood or metal. In very many cases the screws that are so injured are necessarily thrown away, not being in keeping with the finished work wherein they were inserted. It is to obviate this difficulty, and to render it absolutely impossible to damage the screw-head that I have made my present improvement. Large quantities of what are known as capped screws77 are used in inishin g up the interior of cars, houses, and for similar purposes. The heads of these screws, either hat or rounded, are covered with a thin metallic plate, which is either silver or nickel plated. The cap being very thin, it requires the utmost nicety to use these screws without injuring the caps. By omitting the usual slot and using the proper-shaped cavity and screw-driver, perfect safety is insured to the metallic cap. The process of capping is. also simpliedby reason of the absence of the slot. Large quantities of softmetal screws, in brass or composition, are much used, and the same difficulty is there met with to a greater extent. It is in the removing or withdrawing of screws that my invention proves its great utility. Screws that have been long embedded are very difficult to move by the use of an ordinary screw-driver, it invariably slipping from the slot, repeating the same until it is utterly impossible to start the screw or to obtain a hold in the slot. My invention completely eradicates this trouble,- and the screw is readily withdrawn at the iirst trial. y

In Figs. 1, 2, 3, and 4, a represents a cavity formed in the head of the ordinary screw ot' commerce. It is made of such depth and size as may in practice be found to be necessary to fully accomplish my purpose. It is made tapering, usually, from the top to its bottom, as shown.. In Fig. 5, b represents the cavity as made in the shape of a triangle.

The cavity may be formed in the screwmachine at the time the screw is made, by any of the well-known mechanical processes, this being no part of my invention, and requires no description here.

In Figs. l, 3, and 6 I have shown the cavity a as it is used in combination with the usual slot. In Figs. 2, 4, and 5 I show the cavity only in the head, omitting theV slot therefrom. This form is particularly adapted to the capped screws, and in this case the screw-driver is shaped accordingly.

Having fully described my invention, I l

claim as new and wish to secure by Letters Patent- A screw the head of which is provided at its center with an angular cavity, as shown and described, and with the usual slot, as set forth.

ALLAN eUni/nues.

In presence of- A. L. MmvsoN,

WM. S. SAMPsoN.

US161390D Allan cummings Expired - Lifetime US161390A (en)

Publications (1)

Publication Number Publication Date
US161390A true US161390A (en) 1875-03-30

Family

ID=2230799

Family Applications (1)

Application Number Title Priority Date Filing Date
US161390D Expired - Lifetime US161390A (en) Allan cummings

Country Status (1)

Country Link
US (1) US161390A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2816473A (en) * 1952-06-24 1957-12-17 Katherine G Labbee Fastening device having a lock cavity for a screw driver
US3463209A (en) * 1965-05-17 1969-08-26 Romain Podolsky Screw fasteners
US6186718B1 (en) 1998-06-18 2001-02-13 Northrop Grumman Corporation Threaded fastener having a head with a triangle centerpost within a triangle recess
US6423067B1 (en) * 1999-04-29 2002-07-23 Theken Surgical Llc Nonlinear lag screw with captive driving device
US6430756B1 (en) * 1998-12-28 2002-08-13 George W. Reilly Closet bolt
US20040034385A1 (en) * 1997-11-07 2004-02-19 Paul Gilson Embolic protection device
US20080256754A1 (en) * 2007-04-20 2008-10-23 Jason Scott Mevius Multi-tool adjusting screw
US20110211863A1 (en) * 1995-03-27 2011-09-01 Canon Kabushiki Kaisha Coupling part, photosensitive drum, process cartridge and electrophotographic image forming apparatus

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2816473A (en) * 1952-06-24 1957-12-17 Katherine G Labbee Fastening device having a lock cavity for a screw driver
US3463209A (en) * 1965-05-17 1969-08-26 Romain Podolsky Screw fasteners
US8725042B2 (en) 1995-03-27 2014-05-13 Canon Kabushiki Kaisha Coupling part, photosensitive drum, process cartridge and electrophotographic image forming apparatus
US9046860B2 (en) 1995-03-27 2015-06-02 Canon Kabushiki Kaisha Coupling part, photosensitive drum, process cartridge and electrophotographic image forming apparatus
US20110211863A1 (en) * 1995-03-27 2011-09-01 Canon Kabushiki Kaisha Coupling part, photosensitive drum, process cartridge and electrophotographic image forming apparatus
US20040034385A1 (en) * 1997-11-07 2004-02-19 Paul Gilson Embolic protection device
US6186718B1 (en) 1998-06-18 2001-02-13 Northrop Grumman Corporation Threaded fastener having a head with a triangle centerpost within a triangle recess
US6430756B1 (en) * 1998-12-28 2002-08-13 George W. Reilly Closet bolt
US6423067B1 (en) * 1999-04-29 2002-07-23 Theken Surgical Llc Nonlinear lag screw with captive driving device
US20080256754A1 (en) * 2007-04-20 2008-10-23 Jason Scott Mevius Multi-tool adjusting screw
AU2008242998B2 (en) * 2007-04-20 2013-07-11 Fisher Controls International Llc Multi-tool adjusting screw
US8840349B2 (en) * 2007-04-20 2014-09-23 Fisher Controls International, Llc Multi-tool adjusting screw

Similar Documents

Publication Publication Date Title
US2352982A (en) Screw for plastics
US2060593A (en) Metal element and method of making the same
US3969820A (en) Composite dowel pin for dental models
Thorne Mungo and kow swamp: morphological variation in Pleistocene Australians
ES345269A1 (en) Rotary threaded fasteners
GB1287214A (en) A blind fastener
Crandall et al. Psi-missing and displacement: Evidence for improperly focused psi?
GB1050351A (en)
US2452192A (en) Lock nut
US705626A (en) Metallic strap.
CN204344619U (en) Self-locking tapping screw
US3108371A (en) Method of making sheet metal fastener
US2263424A (en) Self tapping screw
US1229911A (en) Nut.
US1868415A (en) Method of manufacturing screws with one or two appending washers
US2046839A (en) Screw
US1988813A (en) Lug bolt and cap for same
US1330098A (en) Machine-screw
GB1234176A (en)
US1345443A (en) Screwdriver
RU176532U1 (en) Anti-vandal threaded connection
GB151183A (en) Improvements in or relating to a process of producing cylindrical holes having an exact diameter
CN204344620U (en) Theftproof self-locking type tapping screw
US3456548A (en) Screw with hexagonal-collared slotted head
US2136523A (en) Socket head cap screw or like fastener