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 provide a device of this description which shall be
easy of attachment and simple to manufacture, and with these ends in view my
invention consists in the details of construction and combination of elements here-
inafter fully described and then specifically designated by the claim :—
Referring to the accompanying drawing;
Fig. 1, is an end view of the latch hub;
Fig. 2, a central longitudinal section of the hub with one of the knob shanks
therein in elevation, but partially broken away;
Fig. 3, an end view of the shank ;
Fig. 4, a side elevation of the shank, and
Fig. 5, a vertical section through a latch provided with independent hubs in one
of which a knob shank is shown as secured.
Similar letters denote like parts in the several figures :
A, is the latch hub having a circular opening extending therethrough at each end
of which two lugs, B, opposite to one another extend inwardly from the edges of
the hub.
C, is the knob shank grooved at, D, so as to form the head, E.
This groove, D, is slightly wider than the thickness of the lugs, B, for the purpose
presently explained.
The head of the knob shank has in its periphery two channels, F, corresponding
in shape to, but slightly larger than the lugs, B, on the hub, and extending
longitudinally throughout the length of said head.
The head has also two recesses, G, formed therein at its inner face opposite to
one another and alternating with the channels, F.
These recesses are adapted to contain the lugs, B.
To attach the knobs to the hub, the channels in the head of the shank are placed
in coincidence with the lugs on the hub, and the head of the shank then pushed
inward till it has passed said lugs and the latter are in the groove, D.
Prica 61

page_text: The shank is then given a partial turn and drawn outward thus causing the lugs
to enter the recesses, G.
The latch hub may then be readily turned by the knob to operate the latch.
The head of the shank will be retained in this engagement without the employ-
ment of any special means, but if desired, any simple contrivance may be utilized
in this connection without departing from the spirit of my invention.
In Fig. 5, I have shown independent latch hubs with which the heads may
engage, but the construction is the same as that above described, the latch hub
being merely divided so that the knobs may have each an independent action.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, I declare that what
I claim is
The combination with a latch hub having a central opening therethrough and
inwardly projecting lugs at either end thereof of a headed knob shank provided
with channels longitudinal of its head and corresponding in relative position to
said lugs, and recesses formed in the inner end of the head of the shank and
alternating with said channels and adapted to contain said lugs, substantially as
set forth.