US416310A - Knob attachment - Google Patents

Description

(No Model.)

E. S. WINCHESTER..

KNOB ATTACHMENT. 110.416,310. Patented Dec. 3,v 1889.

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' UNITED ASTATES PATENT EErcE.

EDVARD S. IVINCHESTER, OF DORCHESTER, MASSACHUSETTS.

KNOB ATTACHMENT.

SPECIFICATION forming part of Letters Patent No. l1-6,310, dated December 3, 1889.

.Application filed February l5. 1889. Serial No. 300,076. (No model.)

To @ZZ whom. tamay concern.-

Be it known that I, EDWARD S. WINCHEs- TER, of Dorchester, in the county of Sulolk and State of Massachusetts, have invented certain Improvements in Door-Latches, of which the following is a specification.

The object of my invention is to provide for the ready connection and disconnection of the knobs and knob-spindle, and to prevent looseness or rattling of the parts when in operative position. y

To this end it consists, in a peculiar construction and arrangement of part-s, having as its basis a knob-shank toothed to interlock with the usual hub or tumbler by which the latch is operated, as hereinafter explained in detail.

In the drawings I have illustrated my invention as applied to a rim-latch; but it is to be understood that it may be applied in like form and manner to the mortise-latch.

In the accompanying drawings, Figure l is a vertical transverse section through a latch provided with my improvements. Fig. 2 is an outline View showing the mannerin which the knobs are unlocked. Fig. 3 is a perspective view of the knob-spindle and co-operating parts.

Referring to the drawings, A represents a latch-case, having, as usual, the inner and outer walls d and a', and also having on one in the case b f the side 'ournalsh b as usual .l J 7 a,

and is provided on one side with a projection b2, extending into the sleeve a2 of the case, and toothed or notched at the outer end, as shown.

C represents the inner knob,having a shank c inserted within the sleeve a2 of the case, and toothed at its end to interlock with the hub B. When the parts are interlocked, the rotation of the knob compels a like movement of the hub. By moving the knob endwise it may be disengaged from the hub, so as to turn independently.

D represents the outer knob, rigidly and permanently aiiixed to one end of the spindle, which has a square or angular portion d and a threaded extremityl d.

E represents a strong spiral spring, which is slipped over the spindle and against the outer knob D. The'square portion of the spindle is passed through the hub B, and its threaded end screw-ed in-to the knob C. The spring acting between the hub and the outer knob D urges the spindle outward in the direction indicated by the arrow in Fig. 1, and the spindle in turn acts to draw the inner knob toward the case, so as to keep its toothed or serrated end in engagement with the hub, as shown in Fig. l. When the parts are thus interlocked, the rotation of either knob serves to turn the hub, which is prevented from rotating on the spindle by reason of the angular form of the latter serving to prevent the rotation of the inner knob C upon the spindle, and thus prevents the parts being separated.

In order to remove lthe knobs, it is \only necessary to push axially on the outer knob D with force sufficient to compress the spring. The effect of this action is to push on the spring endwise and carry the inner knob C out of engagement with the hub B, as indicated in Fig. 2. rlhis leaves the inner knob free to be unscrewed from the spindle, after which the latter may be withdrawn in an endwise direction. v

In assembling the parts the spindle with the spring thereon is first inserted and the spring compressed, after which the knob-seat is screwed inward to the required point. The knob B is then relieved from pressure, and the reaction of the spring causes the interlocking of the knob and hub.

It will be Observed that under my construction the spring is the only piece used in addition to those ordinarily employed in springlatches. It will also be observed that the spring serves not only to maint-ain the connect-ion of the parts, but to hold the parts snugly to their places, so that there can be no play or rattling of the knob in an endwise direction in relation tothe hub. l

I commonly construct the inner knob with an annular iiange c3, fitting over and around the end of the sleeve a?, and this in order to improve the appearance of the latch and to prevent the fingers from being caught bctween the knob and the sleeve.

IOO

llztvinglhns deserihed my invention, what-I l spindle having in angular portion sented ill olztin is I the huh :md a threadedend screwed into sind i5 knol), whereby the Said knol) may be locked and unlocked h v moving` the spindle endwise froln'the opposite side of the ense.

In testimony whereof I hereunto sot my hund, this 18th day of December, 1388, in the pres- 2o ence of two uttosting witnesses.

E[)\VARD S. HIINCIIESTER.

fitnessesz (I. 0. L. DILLAWAY, E. B. JAMES.

1. In combination with the latch-ense and the latch-operating huh toothed at one side,

5 the axially-movable inner knob toothed to en I gage the huh, the outer knob nud its Spindle l having the angular and the threaded portions t seated in the hub and the inner knol), respect t ively, and the spring :toting to urge the Spins ro dle endwise in an outward direction. I

2. In combination with the lntelroperating hub toothed on one side, the knob toothed to interlock therewith, and nn axially-movable

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