US274492A - Tap for cutting spiral wedge nuts - Google Patents

Tap for cutting spiral wedge nuts Download PDF

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Publication number
US274492A
US274492A US274492DA US274492A US 274492 A US274492 A US 274492A US 274492D A US274492D A US 274492DA US 274492 A US274492 A US 274492A
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United States
Prior art keywords
tap
thread
spiral wedge
cutting spiral
nuts
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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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Hayward A Harvey
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
    • B23G5/00—Thread-cutting tools; Die-heads
    • B23G5/02—Thread-cutting tools; Die-heads without means for adjustment
    • B23G5/06—Taps
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/89—Tool or Tool with support
    • Y10T408/904—Tool or Tool with support with pitch-stabilizing ridge
    • Y10T408/9044—Tool or Tool with support with pitch-stabilizing ridge including cutting teeth of different width

Definitions

  • the tap which I have invented for this purpose is provided Vwith a th readot' uniform pitch, the convolutious ot' which, iu the forward portion of the tap, have comparatively narrow bases and steeply-inclined sides, while the consecutively adjoining convolutions have their bases progressively widened and their sides graduallydiminished in steepness.
  • At its forward end it is tapered, and is provided with a suitable number of convolutions ot a groove which has a ilat bottom, forming obtuse angies with the sides ot' the threads.
  • the intermediate section ot' the tap is provided with a tiet-bottomed spiral groove, the bottom of which gradually diminishes in width, its angles with the sides ot' the thread gradually diminishing in obtuseness until the sides of the thread meet.
  • Figure l is an elevation
  • Fig. 2 is a central longitudinal suction.
  • the drawings represent a tap, A, provided with a screw -thread of unitorm pitch, rendered discontinuous h v the usual longitudinal grooves, A'.'
  • the forward section, c, ot' the tap has the usual taper, and is provided, as
  • the angles of thesidesot' the thread with the dat-bottomed groove gradually change.
  • the bottom of the groove gradually diminishes in width until the sides of the thread meet, forming the triangular grooves of the several convolutions of the heel-section a of the tap.
  • a tap 'orcutting spiral wedgennts substantially such as herein described, the same consisting ot'a tap having the usual taper at its forward end, and the usual longitudinal grooves, and provided throughout with a spiral thread otA uniform pitch, the convolutions otl which, in the forward portion of the tap, have sides forming excessively acute angles'with each other, by which this portion of the tap is adapted to outl a certain number ot con volutious of' a truncated thread in the nut, while the adjoining convolutions of the thread in the middle section 'of the tap have sides the angles ot' whichy relatively to each other gradually diminish in acuteness, by which the middle section of the tapis adapted to cut a certain number of con'- volutions of the nut-'thread in the form of truncated threads with progressively narrowing apioes, and the remaining or heel section ot' the tap has a thread the convolutions

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gas Burners (AREA)

Description

VEY
L WE
DGB NUTS.
atented Mar. 27,1883.
E. A. HAB
'TTING SPIR re l,
n mens. mnuuwgmmf. wnnmgmf. n. c.
UNITED STATES PATENT OFFICE.
HAYNVARD A. HARVEY, 0F ORANGE, NEW JERSEY.
TAP FOR CUTTING SPIRAL WEDGE-NUTS.
SPECIFICATION forming part of Letters Patent No. 274,492, dated March 2'?, 1883. i
Application filed Noveinliet l4. i882. (No modeLl To tl-l who-m it maij concern Be it known that I, HAYWARD A. HARVEY, ot' Orange, New Jersey, have invented a. certain Improvement in Taps for Cutting Spiral Wedge-Nuts, of which the following is a speciiication.
The tap which I have invented for this purpose is provided Vwith a th readot' uniform pitch, the convolutious ot' which, iu the forward portion of the tap, have comparatively narrow bases and steeply-inclined sides, while the consecutively adjoining convolutions have their bases progressively widened and their sides graduallydiminished in steepness. At its forward end it is tapered, and is provided with a suitable number of convolutions ot a groove which has a ilat bottom, forming obtuse angies with the sides ot' the threads. The intermediate section ot' the tap is provided with a tiet-bottomed spiral groove, the bottom of which gradually diminishes in width, its angles with the sides ot' the thread gradually diminishing in obtuseness until the sides of the thread meet. l
In the accompanying drawings, illustrating a tap embodying my invention, Figure l is an elevation, and Fig. 2 is a central longitudinal suction.
The drawings represent a tap, A, provided with a screw -thread of unitorm pitch, rendered discontinuous h v the usual longitudinal grooves, A'.' The forward section, c, ot' the tap has the usual taper, and is provided, as
Y will he seen, with a dat-bottomed spiral groove.
In the middle section, b, of the tap the angles of thesidesot' the thread with the dat-bottomed groove gradually change. The bottom of the groove gradually diminishes in width until the sides of the thread meet, forming the triangular grooves of the several convolutions of the heel-section a of the tap.
`It will he seen that by a. single insertion of this tap into a. nut-blank there will be cut in the blank, first, a number of convolutions of a truncated thread, then a number of convolu tions of a truncated thread graduallymerging into a V-thread by the progressive narrowing ot' its apex, and, iinally, a number of convolutions of a Vtbread.
In Letters Patent of the United States No. 224,591, dated February 17, 1880, granted to me for improvement in lock-nuts, l described a method of making a nut of this character hy the use ot' two taps, the one cutting a truncated thread throughout the entirel length of the holethrongh thenut-blank, and theotheradapted to gradually transform the truncated th read into a V-thread.
By my present invention, as will be seen, yl am enabled with a single tap to perform the entire operation of cutting the thread in a nut ot' the character described.
' I claim as my invention- A tap 'orcutting spiral wedgennts, substantially such as herein described, the same consisting ot'a tap having the usual taper at its forward end, and the usual longitudinal grooves, and provided throughout with a spiral thread otA uniform pitch, the convolutions otl which, in the forward portion of the tap, have sides forming excessively acute angles'with each other, by which this portion of the tap is adapted to outl a certain number ot con volutious of' a truncated thread in the nut, while the adjoining convolutions of the thread in the middle section 'of the tap have sides the angles ot' whichy relatively to each other gradually diminish in acuteness, by which the middle section of the tapis adapted to cut a certain number of con'- volutions of the nut-'thread in the form of truncated threads with progressively narrowing apioes, and the remaining or heel section ot' the tap has a thread the convolutions ot which are alike in their area and shape in cross-section, and are thusadapted to cut a number ot' similarly lilreconvolutionsofthread in the nur.
' H. A. HARVEY. Witnesses ASA FARE, M. L. ADAMS.
US274492D 1882-11-14 1882-11-14 Tap for cutting spiral wedge nuts Expired - Lifetime US274492A (en)

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US274492TA 1882-11-14 1882-11-14

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US274492A true US274492A (en) 1883-03-27

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001024844A2 (en) * 1999-10-05 2001-04-12 Macropore, Inc. Heating pen, tack seating device, and tap and surgical implantation methods using same
US6217267B1 (en) * 1997-07-16 2001-04-17 Osg Corporation Cold forming tap having internal finish cutting edge and method of producing the same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6217267B1 (en) * 1997-07-16 2001-04-17 Osg Corporation Cold forming tap having internal finish cutting edge and method of producing the same
WO2001024844A2 (en) * 1999-10-05 2001-04-12 Macropore, Inc. Heating pen, tack seating device, and tap and surgical implantation methods using same
WO2001024844A3 (en) * 1999-10-05 2001-10-11 Macropore Inc Heating pen, tack seating device, and tap and surgical implantation methods using same
US7104994B1 (en) 1999-10-05 2006-09-12 Cytori Therapeutics, Inc. Heating pen, tack seating device, and tap and surgical implantation methods using same

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