US956947A - Knob-spindle fastener. - Google Patents

Description

W. GURLETTV. KNOB SPINDLE FASTENER.

APLIOATION FILED APB.. 21. 1909. BENBWBD MAR. 31, 1910.

@Mum/Iton Strom,

Patented May 3, 1910.

WILLIAM CURLETT, OF SAN FRANCISCO, CALIFORNIA.

KNOB-SPINDLE FASTENER.

Specification of Letters Patent.

Patented May 3, 1910.

Application filed April 21, 1909, Serial No. 491,336. Renewed March 31, 1910. Serial No. 552,634.

T o all whom fit may concern.' y

Be it. known that I, VILLLUI C'UnLn'r'r, citizen of the United States, residing at San Francisco, in the county of San Francisco and State of California, have invented new and useful Improvements in Knob-Spindle Fasteners, of which the following is a speciiication.

My invention pertains to locks and latches, and particularly to knob-spindle fasteners; and it consists in the peculiar' and advair tageous construction, hereinafter described and claimed, whereby when occasion demands a knob-spindle may be fixed against rotation with a view of preventing movement of the bolt connected with and designed to be operated by the knob-spindle.

In the drawings accompanying and forming part of this specification: Figure l is a view illustrating my improved fastenerI con struction in section and plan as properly arranged relative to a portion of a spindle and a knob thereon. Fig. 2 is an elevation showing the inner side of the casing comprised in my improvements. Fig. 3 is a section taken in the plane indicated by the line 3 3 of Fig. l, looking in the direction indicated by the arrow. Fig. l is a detail vertical section, with the back plate removed, showing the guideway in thecasing for the bolt comprised in my improvements, and also illustrating the stops for limiting outward movement of the bolt. Fig. 5 is a view similar to Fig. 2, but illustrating a modified embodiment of my invention. Fig. t3 is a detail view taken at a right angle to Fig. 5.

Referring by letter to the said drawings, and more particularly to Figs. l to 4l, there of: A is a spindle of the usual angular form in cross-section.

B is an ordinary knob on the spindle, and C is the casing comprised in my improvements. The casing C is made up of an escuteheon a which is shaped to receive and permit free turning of the reduced portion of the knob B, and is provided with a radially-disposed aperture I) in its marginal flange c, and is also provided .in said mar gina] flange with one or more, preferably two, protuberanees al, and a plate e seated in the flange c of the escutcheon at the back thereof, and having notches in its periphery receiving the protuberances (l, whereby the protubcrances may be used for riveting the plate to the escutcheon, and screws rlhe screws pass through the escutcheon and plate c, and serve to connect the same t0 the door. As best shown in F l and 2, the plate c of the casing C is formed in part by a spring strip g which is produced by providing the plate with parallel cuts extending to its periphery, and is equipped with a rounded protuberance L. The escutcheon (i of the casing C is provided interiorly with a guidcway z', Fig. il, arranged in alinement with the before-mentioned aperture L, and is also provided at the inner end of the said guideway 'i' with stops '.lhe said guideway i and stops j are designed to cooperate with the slide-bolt I) of the novel fastener; the said slide-bolt being arranged `in the guideway z' and aperture b of the escutcheon 11., and being provided at its outer end with a linger-piece u. At its inner end the slide-bolt l) is forked, as indicated by Z, to straddle the spindle A, and at an intermediate point of its length said slidebolt is provided with shoulders mf, designed to bring up against the before-mentioned stops with a view of limiting outward movement of the slide-bolt.

In its side adjacent the casing plate c, the slide-bolt I) is provided with two depressions n, separated by an intervening Space, as best shown in Fig. l. One of the said dcpressions 11, is designed to receive the protuberances /t of the spring strip f/ when the slide-bolt is in engagement with the spindle A to prevent turning thereof, and the other depression a has for its office to receive the protuberance /t when the slide-bolt is in its outermost position, and the spindle A is free to turn. Thus it will be manifest that the spring strip f/ is adapted to hold the slidebolt l) against casual movement when said slide-bolt is cooperating with the spindle A, and also when the slide-bolt is idle, and yet when it is desired, the slide-bolt may be moved from one position to the other by ex erting a slight pull or push on the fingerpiece thereof.

lt will be gathered from theI foregoingthat through the medium of my improvements the spindle A may be expeditiously and easily locked against; rotation when ocea- I sion demands, and by such operation a door may be locked from the inside thereof. It will also be gathered by particular reference to Figs. 1 and 2, that the parts of my iniprovements may be readily assembled in proper position, relative to the splndle A and the knob l, and that incidental to such assemblage of parts the projections d on the escutcheon a will, by entering complementary notches in the back plate e, serve to facilitate placing of the spring strip g opposite the guideway z', and Will also serve to retain the plate e in proper position, especially when the projections d are used to rivet the plate e to escutcheon a.

In the modied construction shown in Fig. 5 and Fig. 6, the casing C comprises an escutcheon a and a back plate c', Which is soldered or otherwise connected to the back of the escutcheon a, as indicated by It Will be readily appreciated from theforegoing description that both embodiments of my invention are simple and coinpact and do not comprise any delicate parts such as are likely to get out of order after a short period of use.

Vhile I prefer the specific constructions herein shown and described, I do not desire to be understood as confining myself to the same, this for the reason that in the future practice of the invention it may be found desirable to make changes in the construction and relative arrangement of the parts Within the scope of my invention as claimed.

Having described my invention, what I claim and desire to secure by Letters-Patent, is:

In a knob-spindle fastener, a casing comprising an escutcheon, and a back-plate connected with the escutcheon and formed in part by a spring strip integral With the plate at one end and divided therefrom by slits extending to the edge of the plate and having a protuberance adjacent its free end, in combination With a slidable bolt guided in the casing, between the escutcheon and the back plate thereof, and having a depression adapted to cooperate With the said protuberance of the spring strip.

In testimony whereof I have hereunto set my hand in presence of tWo subscribing Witnesses.

WILLIAM CURLETT. Witnesses:

FLORENCE D. FnNsoM, EDITH W. BURNHAM.

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