US 470520 A
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WTIMMIS. NUT LUCK.
` No. 470,520. 4 Patented-Mar, 1892.
UNITED STATES PATENT OFFICE.
VILLIAM TIMMIS, OF XVILKINSBURG, PENNSYLVANIA.
SPECIFICATION fomning'part of Letters Patent No. 470,520, dated March 8, 1892.
Application filed December 3, 1891. Serial No. 413.889. (No model.)
. To all whom, it may concern:
Be it known that I, WILLIAM TIMMIS, a citizen of the United States of America, residing at Vilkinsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Nut' Locks; and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specication.
This invention relates to improvements in nut-locks.
The object of the invention is to provide an improved lock which is adapted to hold the nut and bolt .against rotation; and it consists in the employment of a fish-plate having a depression adjacent to the aperture through which the bolt passes, said depression gradually increasing in depth from one end until it meets an outwardly-projecting portion, adjacent to which is a recess as deep or deeper than the deepest part of the depression, said fish-plate being adapted to be used with a spring-washer having oppositely-projecting portions on its free ends, one end forming a spring-pawl, which is adapted to engage with the ratchet-teeth on the inner face of the nut-,fas will be hereinafter fully Set forth, and particularly pointed out in the claims.
In the accompanying drawings, forming part of this speciiication, Figure 1 is a perspective view of an improved nut-lock constructed in accordance'with my invention, one of the nuts being shown locked in position. Fig. 2 is avertical sectional view taken through the line :r o: of Fig. l, said view also showing the application of a tool employed for compressing the spring-washer so as to release the nut. Fig. 3 is a detail perspective view of the washer. Fig. 4: is a perspective view showing the inner face of the nut. Fig. 5 is a perspective View showing the construction of the base or iish plate when applied to wooden surfaces.
A refers to the base or fish plate, which is provided with an aperture a, through which the bolt is passed, said bolt being held against adapted to project beyond the nut. 'F is provided-with a ratchet-face, the inrotation by the head thereof lying in a recess in the fish-plate, or by providing the fish-plate with lugs and the head with recesses to receive the same. to the aperture ct is recessed orreamed out from a point indicated by Z, the said recess increasing in depth and width in the direction of the arrow until it reaches the lug or outwardly-projecting portion b, the side walls of which radiate from the aperture a. This recess c may be formed in the base-plate when it is cast or forged, and it will be noted that the projection b has its face on the same plane as the face of the base-plate. Between the commencement of the recess c and the projection b is formed a recess d, which is fully as deep or deeper than the deepest part of the recess o. A
E designatesa helical spring-washer, the under face e of which is inclined or convex, while its outer face is fiat. This' washer has a projection f formed on one end, which eX- tends inward and is adapted, when the parts are organized, to lie within the recess d. The opposite end of the washer has formed thereon a rigid pawl g, and beyond the same a straight portion h, said straight portion being The nut clined portion of each tooth terminating before it reaches the point thereof, so as to provide flat portions fi, which will bear against the flat face of the spring-washer.
I am aware that prior to my invention it has been proposed to provide a nut-lock with a spring-washer having the ends bent to lie in different planes, one of the ends engaging with a nut having a ratchet-face and the other with the base-plate to hold the washer and nut against rotation, and I do not therefore claim such construction, broadly, as my invention,the same being distinguished therefrom in that the base-plate has not been recessed and provided with a projection, nor a further recess in which the end of the washer lies, and, further, in that the nut employed with such construction has notbeen-provided with flat bearingsurfaces.
In operation the bolt is passed through the objects it is desired to connect and the headed end of the same held against rotation. The washer E is then placed over the bolt, so that The base-plate A adjacent its end f will lie inthe depressin or recess d, and it Will be observed that as the end fis of less Width than the recess d said end will have a slight play therein. The nut is no w placed upon the bolt and screwed home, and the Hat portions 7l thereof will bear upon the straightV when this is done the nut can be turned.
One great advantage which accrues from providing a recessed of greater Width than the projecting portion f is that the required degree of play is given to the helical washer, so that when it is compressed by the nut it can move so as to enter the deep portion of the recess. It will also be noted that the shallow portion of the depression c' will hold what may be termed the rigid end of the helical washer securely and in a substantially xed position, so that in some cases the projection fand recess d may be dispensed with. By providing the recess or depression c, which gradually increases in depth and width adjacent to the aperture through which the bolt passes, and a helical washer constructed as shown, one end of said washer will be held by the nut in positive engagel'nent with the fish-plate, while the other end is allowed a sufficient spring movement to engage with the ratchet-face of the nut, and when the parts are locked together and it is desired to release the nut the spring end of thewasher can be depressed to spring the locking-pawl out of engagement with the teeth ofthe nut.
Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-
l. The combination, in a nut-lock, of a base` plate having an aperture through Which the allyincreasing in depth and width therefrom` to the projection b, a spring-Washer having flat outer face and inclined innerl faces, said Washerbeing thickest at the portion adjacent to the aperture therein, one end of the Washer having a projection f and a pawl on the opposite end and face, a flat portion being formed on the face of the Washer adjacent to the pawl g, and a nuthaving a ratchet-face, said nut being of less diameter than the Washer,`substantially as shown, and for the purpose set forth.
2. As an improved article of manufacture, a b'ase-plate for nut-locks, having an aperture a, through which the bolt passes, and an eccentric recess of gradually-increased depth surrounding the bolt-aperture, said depression also increasing in width from its commencement or narrowest point, for the purpose set forth.Y Y
3. In combination with a nut-lock, a springwasher constructed substantially as shown and provided with a iat outer face and projection or pawl` g, a beveled or inclined inner face,a nut F,having a ratchet-face the teeth of which terminate in iiat portions, adapted for use with a base-plate'having a central aperture, and a recessed and eccentric depression c, substantially as set forth.
4. The combination, in anut-lock, of abaseplate A, having an aperture through which the bolt passes, a recess d, a projection b, and a depression c, the periphery of which is eocentric with the aperture a, said depression increasing in depth from the recess CZ to the projection b, a helical spring-Washer E, having a projecting portion fand pawl g, and a nut having a ratchet-face, the parts being or` ganized substantially as shown, and for the purpose set forth.
In testimony whereof I affix my signature in presence of two witnesses.
Vitnesses: THos. M. BROWN, JOHN S. LAMBIE.