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Publication numberUS867429 A
Publication typeGrant
Publication dateOct 1, 1907
Filing dateJun 1, 1907
Priority dateJun 1, 1907
Publication numberUS 867429 A, US 867429A, US-A-867429, US867429 A, US867429A
InventorsRobert E L Simmerman
Original AssigneeRobert E L Simmerman
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 867429 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

PATENTED OCT. 1, 1907.



' sans ATE a once.


Specification of Iietters Patent.

Patented 0ot. 1, 1907.

Application filed June 1, 1907. Serial No. 376,776.

To all whom it may concern:

Be it known that I, Bonner E. L. SIMMERMAN, a citizen of the United States, residing at Hartford, in the county of Ohio and'State of Kentucky, have invented new and useful Improvements in Spikes, of which the following is a specification. I I

This invention relates to spikes of that class which are provided with keys for securely anchoring them after being driven home into the timber, railway tie, or other structure with which the spike is used.

It is well known that spikes have been constructed with central bores extending longitudinally thereof and communicating with opposite outlet openings at a distance above the terminal of the driving point to receive a longitudinally split key which is driven downwardly through the spike and has the legs thereof divergently projected through the outlet openings into the wood of the tie or other structure into which the spike is driven. It is also known that a nail has been provided with a longitudinal bore having a single outlet to receive a second smaller key nail of soft metal which is also terminally deflected outwardly into the 'wood or other material into which the primary nail isdriven.

The present improved spike is exteriorly of the same form as an ordinary railroad spike with a bore extending downwardly therethrough to a diverting anvil or angular projection which provides a partition between opposite divergent openings or outlets, the bore tapering towards the anvil or projection and having a wedgeshaped key driven thereinto and formed with a longitudinally split terminal to provide anchoring legs which and serve as anchoring means for the latter.

are deflected outwardly on opposite sides of the spike The longitudinally split terminal of the wedgeshaped key is vso proportioned relatively to the remaining part of the said key that when the latter is fully driven into and has the upper end flush with the top surface of the head of the spike, the "upper-terminal of the split portion of the key will engage the apex of the anvil or projection at the lower extremity of the bore to prevent the key from being driven downwardly beyond a predetermined extent and to effect a more positive anchorage of the spike by the diverged or outwardly turned legs of the key. Furthermore, by preventing the key from being drivendownwardly into the. spike, beyond a predetermined distance, and which is due to the structural proportions of the bore and the key as just specif' 'l, the head of the spike 'will be filled by the key completely to the upper terminal of the bore and thus prevent weakening of the head structure which ,might exist if a portion of the upper extremity of the bore was left unoccupied.

Another advantage derived from having the split extremity of the key of a length. to permit engagement of the upper terminal thereof with the apex of the anvil or projection in conjunction with the wedge shaped contour of the key is that when the spike is withdrawn the key will be prevented from moving loncontiadistinction to a spike wherein the split portion is without definite extent and thebody of the key of equal diameter throughout its length. When a key having an indefinite split portion is used and the terminals are diflrged after such key is driven into a spike, the extraction of the spike will cause the key to slip longitudinally through the spike and the diverged extremities of the key under these conditions will not be started untila considerable portion of the spike has been withdrawn and will result in injuriously tearing or into place it closely fills the bore and practically be- 7 comes apart of the spike owing to itswedge-shape, and incidentally moisture is prevented'from seeping through the bore and reaching the wood of the tie or other wood structure.

In the drawings, Figure 1 is a side elevation of a spike embodying the features of the invention. Fig. 2 is a detail view of the key usedwith the spike. Fig. 3 is a detail elevation of the spike looking at a different side thereof. Fig. 4 is a detail view of the key showing the same in a different position from that illustrated by Fig. 2. Fig. 5 is a sectional view showing a portion of a railway tie or other wood structure with the spike and key applied. Fig. 6 is a top plan view of the spike head.

Similar characters of reference are employed to indicate corresponding parts in the views.

The numeral 1 designates the shank of the spike,- which is of usual form and having a wedge-shaped driving point 2 and a flanged or projected head 3. A bore 4 of angular form, preferably oblong, is formed in the upper extremity of the shank and extends through the head 3, said bore being' tapered from the upper to the lower terminals thereof and located centrally with respect to the shank 1. At the lower terminal of the bore 4 an angular anvil or projection5 is constructed by the formation of divergent outlet openings or passages 6, the greatest width of the outlet openings or passages being less than the minimum diameter of the tapered bore 4, and the longitudinal extent of thesaid bore and of the outlet openings is such that about the lower half of the shank 1 of the spike is left solid to avoid the least deterioration of the necessary driving characteristics of the spike.

The key 7 for anchoring the spike is formed with a wedgcshaped body 8 and a lower longitudinal slit 9 to provide anchoring legs 10, the latter having their ends reduced, as at 11. The slit 9 is of such length relatively to the length of the key that when the said key is fully driven home in the bore 4 the upper terminal thereof will be flush with the upper surface of the head 3 of the spike, and the upper terminal of the slit will be in engagement with the apex of the angrilar anvil or projection 5, and owing to the tapering contour of the bore and body oithe key, the latter will become practically a part of the spike by being jammed Within the bore, it being understood that the maxi mum diameter of the key will be just a trifle greater than the maximum diameter of the bore to insure a jamming adhesion between the key and the wail of the bore. This difference in,v diameter will .not be great enough to necessitate crushing of the upper terminal of lhe key on to the head of the spike and over the upper-terminal margin of the here These specific proportions have been adopted to derive the greatest benefit from a locking key of the type specified, and among others may be mentioned that the key strengthens both the body and head of the spike engaged there- 'by, and is prevented from being driven downwardly beyond a predetermined point, and thus avoid leaving any portion of the bore in the spike head unoccupied;

-Furthermore, when the legs 10 reach the upper ter minals of the outlet openings or passages 6, they are deflected and diverged and caused to turn outwardly, as shown by Fig. 5, within the wood of the tie or other structure inwhich the spike is driven, the body of the key and the legs completely filling the bore 4 and the opening 6 without crevices, and when the spike is withdrawn the legs 10 are started and caused to move upwardly with the spike without any tendency of the key slipping through the spike and obviating any serious injury to the wood in whiclrthe legs have been lodged.

It is well known that the pound on railroad rails of ihe rolling stock and' the general vibration incident to movement of the rolling stock over rails have a tendency to loosen railroad spikes, and to this loosening of the spikes is added the liability of shearing off the heads of the spikes, especially on the low portions of curves. The present spike has been devised to meet and overcome these tendencies, and in this particular connection and as a further advantage, attention is called to the fact that the tapered key and bore, to-

gether with the proportions as to length between the apex of the anvil and the upper terminal oi the bore and the length of the slit 9, are effective in preventing the least movement of the spike, because the key cannot slip longitudinally through the body of the spike and the length of the slit is such as to only provide for a practical divergence of the legs 10, and alter the said legs 10 have been fully driven and set within the wood of the tie, the key cannot move upwardly or dowuwardly within the spike.

The improved spike is adapted for general applica tion, but is particularlyintended for use in securing railroad rails on ties. One of the most eficclivc uses of the spike is in connection with the low rails of curves, because on these low rail s the greatest weight is imposed and consequently the greatest; resistance to movement must be present. The spike with the key therein is not only prevented from being accidentally withdrawn or loosened in a vertical direction. but outward movement thereof is resisted through the divergent disposition of the legs 10 which engage portions of the tie on opposite sides of the spike body,

The preferred oblong contour of the bore 4 insures a proper disposition of the key in the spike, or so that the points 11 oi the legs 10 will register with the openings or passages 6. It is possible, however, to have the bo e of other relative contours.

It will also be understood that modifications in the I end thereof flush with the top surface oi the spike ii -1h and the upper terminal of the slit in the lower extremity,

engaging the apex of the angular unvii lo lmmorubly luild the key against upward or downward movement within the spike.

In testimony whereof I iia'vc hereunto sci my hum! in presence of two subscribing witnesses.

nounn'r it. 1,. SiiiAilCliHAN. Witnesses I). W. (oer-nu, .lNn. 'ir Mouuu.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5478342 *Jun 30, 1994Dec 26, 1995Spinetech, Inc.Reversible bone screw lock
US5820324 *May 20, 1997Oct 13, 1998Chapman; SamuelApparatus for securing abutting flooring members
US6095737 *Mar 5, 1999Aug 1, 2000Es ProductsSheet metal anchor nail fastener with locking staple
US8282675Jan 25, 2008Oct 9, 2012Depuy Spine, Inc.Anti-backout mechanism
US8361130 *Oct 5, 2007Jan 29, 2013Depuy Spine, Inc.Bone screw fixation
US20080086131 *Oct 5, 2007Apr 10, 2008Depuy Spine, Inc.Bone screw fixation
Cooperative ClassificationY10S411/922, E01B9/12