Year: 1886

page_text: I, WILLISTON ISAAC. ALVORD, Manufacturer, residing at 167 Maple Street, in
the City of Bridgeport in the County of Fairfield, and State of Connecticut, one
of the United States of America, do hereby declare the nature of this invention
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
My invention relates to certain novel and useful improvements in knob attach-
ments and has for its object to attach the knob-spindles to the hubs and secure
them in this attachment in a simple and effective manner, and without the use
of screws, and with these ends in view my invention consists in certain details of
construction and combination of elements herein after explained and then specifically
designated by the claims.
Fig. 1 is a longitudinal section showing the knob shanks attached within the
hub, one of the shanks being shown in section and the other in elevation.
Fig. 2 a detail cross section of-the hub and
Fig. 3 an end view of the knob shank showing the shape of the head.
Similar letters denote like parts in the several figures of the drawing.
A is the knob shank which terminates in a head B.
The forward portion of the shank is hollow as seen at C.
The latch hub D is constructed with outward openings F for the admission of
the heads B and counter recesses G within which the heads may be seated after
they have been inserted within the hub and given a quarter turn so as to hold
them as against retraction.
E is a coil spring interposed between the two knob shanks within the opening C.
In assembling my improvement I insert the heads B within the hub with the
coil spring E in position within the openings C in both shanks; the shanks are
then forced inward against the resiliency of the spring and then given a quarter
turn so as to bring the angles or projections of the head out of alignment with the
outer openings of the hub and directly opposite to counter recesses which corre-
spond to the shape of the head in cross section; the pressure is now removed from
the shanks and the spring will now throw the latter backward until the heads are
in the said counter recesses, thereby holding said shanks as against retraction.
In removing the shanks, the latter are forced inward thereby compressing the
spring and then give a quarter turn, which will bring the heads into alignment
with the outer openings of the hub and the shauks may be readily withdrawn,

page_text: It is immaterial whether a single or a sectional hub is used since my improve-
ment is of course applicable to any hub Also the openings in the shanks may be
dispensed with as they only serve as a ready means for introducing the spring and
keeping it in place and I can make the shanks solid and place the spring in the
hub between the ends of the heads, the advantage of the hollow shanks being that
a larger spring can be used and more spring play thereby afforded.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is
1-In combination with a latch hub recessed as shown, the knob shanks termi-
nating in heads adapted to be inserted within the hub and held there against
retraction, and a coil spring interposed between the shanks and adapted to keep
the latter apart and in attachment with the hub, substantially as set forth.
2-The shanks A having openings C and terminating in heads B, in combination
with hub D recessed to accomodate said heads, and the coil spring E interposed
between said shanks within said openings, as specified.