Year: 1885

page_text: I, WILLISTON ISAAC ALVORD, residing at 167, Maple Street, Bridgeport, in the
County of Fairfield, and State of Connecticut, in the United States of America,
gentleman, do hereby declare the nature of this invention aud in what manner thie
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 for latches aud has for its object to attach the two knobs of a latch so that
they can be manipulated independent of each other and with these ends in view
my invention consists in certain details of construction and combination of elements
hereinafter described and then specifically designated by the claims.
In order that those skilled in the art to which my invention appertains may
fully understand its construction and operation I will proceed to describe the same
in detail referring by letter to the accompanying drawings forming a part of this
specification in which
Fig. 1. is a plan view illustrating my improvement without the knobs, the casing
being partly removed and broken away.
Fig. 2 a section taken at the line x-2 of Fig. 1, the casing being complete and a
single shank hub being shown secured within its hub.
Fig. 3 a rear view showing in detail the relative position of the latch shank
and hubs.
Fig. 4 a detail plan view of the inner face of the rear hub.
Fig. 5 a similar view of the outer face of the front hub.
Fig. 6, a detail perspective of the rear end of the latch shank and
Fig. 7 a detail plan view illustrating the inner face of a hub having a modified
form of opening and recess.
Similar letters denote like parts in the several figures of the drawing.
In my applications for Letters Patents of even date with this, I have shown and
described a certain style of knob attachments the principal characteristic of which
is the interlocking of a head on the knob spindle with a shouldered recess.
My present improvement does not materially differ from my above mentioned
attachments in the manner of fastening, but the feature which I now believe to
be novel is the construction and arrangement of the latch hub with respect to the
latch and knob shanks.
A is the latch shank having at its rear end the shoulders B, projecting on either
side. The hub is made in two pieces C, D, each piece having a central opening E
adapted to accommodate the head F of the knob shanks and these openings are
recessed from the inner face so as to afford a seat G for the head Fout of coin-
cidence with the opening E.
In assembling the several parts of my improvement preparatory to attaching
the knobs I place the hub sections on either side of the latch shank as shown in

page_text: Figs. 2 and 3 in such manner that the wings of the hubs will, when operated
readily strike against the shoulders B and actuate the latch.
The exterior of the hubs fit closely within apertures in the casing H so that they
have a fixed position when assembled as shown at Fig. 2. In attaching the knobs
it is only necessary to force the latch backward until the opening J is in alignment
with the openings in the knobs,. insert the head Fof: the knob shank I within said
openings and beyond the hubs, give the knobs a slight turn and then withdraw
them into abutment.with the seats G; the latch is then released and the knobs
thereby prevented from being displaced or removed by the intervention of the
latch shank between the heads as clearly shown at Fig. 2..
Of course any gravity or other ordinary construction may serve to keep the knob
shanks from being removed but I prefer to utilize the latch shank for this purpose,
as it is the simplest and most effective in its operation.
Of course it will be readily understood that the shape or configuration of the
shank head and its corresponding hub opening is immaterial.
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, two separate and independent hubs, each hub
being provided with a detachable knob substantially as set forth.
2. The combination with a latch of two independent hubs arranged on either
side of the latch shank and adapted to operate the latter, and knob shanks
detachably connected to each hub substantially as shown and described.
3. In combination with a latch, having its shank terminating in shoulders
projecting to either side, two independent hubs arranged on either side of the latchi
shank respectively, each hub having an opening recessed from the inside as shown
and described, and knob shanks passed within said openings and detachably secured
therein substantially as and for the purpose specified.
4. The combination of the following elements, to wit:-a latch, two separate
and independent hubs arranged on opposite sides of said latch and adapted to
operate the latter and two knobs whose shanks are detachably secured to said hubs
substantially as shown and set forth.
5. In a knob attachment, the combination of the following clements to wit:-
a latch two independent hubs, arranged on opposite sides of the latch shank and
adapted to operate the latter, and independent knob shanks attached within the
hubs and secured in this position by the interposed latch shank substantially as
set forth,
6. In combination with independent hubs recessed as described, and knob shanks
having heads adapted to be attached to said hubs within said recesses, means as the
body of the latch shank interposed between said heads in their assembled position,
whereby the knob shanks are secured in this position as against retraction
substantially as and for the purpose specified.
7. In combination with the knob shanks having heads as shown, independent
hubs recessed as described, latch shank operated by said hubs, and means
independent of the escutcheon for securing the knob shanks in their assembled
position substantially as set forth.