US961583A - Bolt-anchor. - Google Patents

Description

C. J. CLEMENTS.

BOLT ANCHOR.

APPLIGATION FILED JUNE 1s, 1908.

2 SHEETS-SHEET l. Figa a Patente June M, ww.

C. J. (LMENTS.

BOLT ANCHOR.

APPLICATION HLED JUNE 16, 190s.

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CHARLES J. (LMENTS, OF NEW EMRK.

BOLT-ANCHOR.

ceases.

Specification of Letters Patent. ttigmted Jun@ j jg Qn] 1 Application tiled June 16, 1908. Serial No. 438,752.

To all whom it may concern:

Beit known that l, Cremers J. tlnnuiixrs,

a citizen ot the United States, and a resident of the borough ot Brooklyn, county of Kings, city and State ot New York, have invented certain new and useful improvements in Bolt-Anchors, of wl ich the following is a speciti 'ation accompanied hy drawings.

'lhis invention relates to a new holt anchor or expansion shield, and the ohjeets of the invention are to improve upon the construction ot such devices, increase their etliciency of operation 'and produce a device which is light and rong and cheap to inanufacture.

. Further objects of the invention will hereinafter appear, and to these ends the invention consists of a holt anchor substantially las hereinafter fully described and claimed in this specification and shown in the accompanying drawings, in which- Figure l is a side elevation ot' a device embodying the invention; Fig. 2 is an interior elevation of one-half of the shield separated on the line A, .i of Fig. 4'; Fig. 3 is a longitudinal sectional view on the line B, il oi Fig. l; and Fig. 4 is a transverse sectional view on the line C, C of Fig. 2; Fig. 5 is a longitudinal sectional view of a modification ot' the device in which the threads are arranged in grfnips, Fig. t3 is a longitudinal sectional view of a modification of Fig'. Fig. 7 is a longitudinal sectional View of another inoditication; Fig. 8 is a longitudinal sectional view oi a modification of Fig. 7; Fig. t) is a longitudinal sectional view of a modification, having tapering walls; and Fig. l() is a longitudinal sectional View ot' a modification of Fig. 9.

Referring to ,the drawings, Figs. 1 to 4, A and B represent. the sections of the. shield and C represents the holt for expanding said shield or anchor. The shield may he made out; of one or more sections as desired, and in accordance with this invention, the walls of each section are of approximately uniform thickness throughout, and are provided, with interior screw threads. The interior bore ot the shield tapers toward the inner end and this taper is obtained hy increasingl the height of the threads D as illustrated in the drawings. As the holt is screwed into the sections they are expanded74 to enalile the anchor to grip tightly the. aperture into which it is inserted. By .securing the tapering here hy ineaus ot the. threads ot progressively in creasing;t height, it is possilile to' construct the sections with walls of uniform thickness, thus uuikiugr the sections lighter than heretotore and more resilient and better able to withstand vihration and jars without looseningr the holt. llach section is pretci'ahly provided witha uon-threaded portion E at. its outer eud and the eXterioi-s of the see.- tionsl are provided with rings l", or other projections, in order to obtain a hold in the wall or other place ot use. Lua-s li are provided for prevent ine` lrme'itudinai and transverse movement ot the sections. des show-n the lugs are provided on one section and they project overthe other section, and are seated in recesses therein.

ln' Figs. 5 to 8 inclusive, modifications of the. device are shown in which the walls of the sections are ot substantially uniform thickness as before. In Fig. 5 the tapering screw threaded here is obtained by means of groups of higher and lower threads, the higher threads .l increasing in. height toward the inner end of the anchor, and the lower or depressed threads K being arranged loetween the groups of higher threads. 'The intermediate groups of lower threads in crease the strength ofthe anchor and this increase of strength inay also he obtained by the construction shown iu t5, in which strengthening ribs li are shown between the groups of threads J'. These ribs may be of 'any suitable forin and are .shown in this instance extending longitudinally of the dcvice,-but, they may, if desired, consist of transverse ridges, spiral ridges, or they may, he formed by crimping the walls of the sections.

ln Fign?, the screw threaded bore is obtained oy corrilg'ating the metal of the sections to form the interior threads or corrugations (l and exterior corrugations P. As stated, the walls are of uniform thickness and the tapering coreris obtained by yiiicreasing the height of the corrugationst 0 toward the inner end of the anchor. #According to this construction, the planes of the summits or tops of the outer corrugations P are substantially parallel to the axis of the bore to enable the anchor to be placed in a cylindrical aperture and expanded therein.

ln ltig. 8, the corrugations are arranged in groups, andthe higher corrugations Q. in

'interior tapering screw crease inheight toward the inner end of the anchor. Between the groups of higher corrugations"v are provided the4 lower or depressed corrugat-ions R for strengthening purposes. Instead et corrugations R, the sections may be strengthened by means-of ribs or ridges as in llig. G.

yln Figs. 9 and l0, the Walls S of the sections are shown tapering instead of uniform in thickness and the interior screw threads are arranged in groups of higher threads T and lower threads U, but in this instance, the higher threads are of uniform height. In Fig. l0, strengthening ridges or ribs V provided between the groups of higher threads.

l claiin and desire to obtain hy Letters Patent the following:

l. A holt anchor having outwardly cylindrical walls ol uniform thickness, and a tapering screw threaded here.

An anchor holt having outwardly cylindrical walls of uniform thickness, and an interior tapering bore obtained by screw threads of progressively increasing height toward one end of the anchor.

3. il. bolt anchor having outwardly-cylindrical walls or uniform thickness, and an threaded here, said screw threads progressively varying in height. Y f

4t. l bolt anchor having outwardly cylindrical walls of uniform thickness, and a ta pering bore formed h; screw threads of varying height, one end of said bore heilig unscrew threaded and anchor being provided w th annular pro- 'jectlons a plirality outwardly cylin- A holt anchor, comprising of sections, each having Lirical wellsI of uh 'erin thickness, and a tapering bore formed by screw threads of varying height, the e.\:terior of the anchor being provided with annular corrngations.

G i' hhlttairehor having outwardly cylindrical walls'of uniform thickness, and atapering here termedV by screw threads of varying l'ieight.

7. fr colt anchor having outwardly cylindrical walls of uniform thickness and a tapering screw threaded here having groups the exterior of the` senese l of threads increasing in height toward one 9. A bolt anchor having outwardly cylindrical walls parallel to the axis of the bore and of uniform thickness7 and interior threads increasing in height toward one end.

l0. A holt anchor having outwardly cylindrical wa is ci".- unit'orin thickness and e tapering screw threaded here having groups of higher and lower threads, the pitch dia1n- -cter of the higher threads decreasing t0- ward one end.

l1. A bolt anchor provided. with or' interior engaging threads and strength ening ribs ar anged between said groups of threads.

1Q. A holt anchor provided with groen." ot interlor threads and strengthening ribs arranged longitudinally lietween' said groups of tin-ends.

13. A bolt anchor comprising a plurelity of sections, each section having a main hody ,portion or base of uniform thickness and of cylindrical exterior contour, the interior heing screw threaded and forming a.` tapering bore by a progressive increase inthe height of the threads toward one end of the anchor, the exterior of each lug annular corrugations.`

ll. .il holt anchor comprising e plurality ot' sections, having main body 'portions or bases o'nniforin thickness throughout, and exteriorly cj'indrical, the interior of each si tion having wscrew threads progresfvely 'varying in height to form a tapcrii'ig here, the bases of the threads being at a uniform distance from the axis of the here, end the exterior of the sections having annular corrugations.

ln testimony whereof l have signed this specification in the presence oi' two suhscribing witnesses.

CHARLES J. Clildlifillll'. TWitnesses: y Enw. A. STULA,

l. B. Moons.

threads increasing in height toward one end.,

groups section having register-

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