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, 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 such a device as shall be simple in
construction and ready of attachment and with these ends in view my invention
consists in the details of construction hereinafter explained and then designated by
the claims, In order that those skilled in the art to which my invention appertains
may fully understand my improvements, I will describe the same in detail referring
by letter to the accompanying drawing forming a part of this specification in
which Fig. 1 is a central longitudinal section of a pair of knobs attached to the
latch hub in accordance with my improvement. Fig. 2 a detail end view of the
hub, Fig. 3 a detail section of the hub taken at the line x-x of Fig. 1.
Fig. 4 a detail perspective of one of the knob spindles and,
Fig. 5 an end view of the knob shank.
Similar letters denote like parts in all the figures of the drawing.
A are the knobs within which are spindles B, C are coil springs around the
spindles and confined by shoulders D on the extremities of the spindles and the
knob shanks E. F are openings in the forward ends of the shanks E square in
cross section Gare square collars formed integral with the spindles and contained in
their assembled position, within the openings F into which they fit closely. H are
square heads formed on the outer extremities of the spindles at a short distance
from the collars G. I are rectangular recesses at the ends of the shanks E and
extending outwardly from the central lateral edges of the openings F (see Fig. 5).
J is the latch hub having central opening K the outer diameters of which are
square in cross section and adapted to contain the heads H, the central portion of
this, opening is large enough to permit the heads to turn freely therein.
Upon either side of the central opening K are triangular cavities forming
recesses M eight-star shaped in cross section and having four of the corners
coincident and four alternating with the corners of the square openings outward
through the end walls of the hub. In adapting the spindles for insertion within
Price 1

page_text: the hub I proceed as follows:-The spindles are pulled outward against the action
of the springs until the square collars are beyond the shanks, when the spindles are
given an eighth of a turn and then allowed to spring back within the recesses I.
The method of attaching the knobs is as follows:-The spindle is inserted within
the square hole in the side of the hub until the head H has passed beyond the round
part and within the enlarged central portion; the spindle is now given an eighth
of a turn and pulled back until the corners of the head fit within the recesses M.
The knobs are now pulled outward until the collars are beyond the shanks, when
the knobs are turned so as to bring said collars into alignment with the square
recesses F, the knobs are now released and the action of the springs brings the
knobs snugly against the hub, in operative position as will be readily seen in
Fig. 1. I do not wish to be confined to the exact shape of collars and heads shown
as any shape other than a circle will serve my purpose equally as well.
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 a knob attachment, the combination with the knobs having recesses in
their inner shank ends, of independent spring actuated spindles having collars and
heads as described, the latch hub having opening corresponding at the sides to the
shape of the heads and enlarged at the central portion and recesses formed in the
inner end walls of said opening at the lateral edges of same and adapted to contain
said heads substantially as described.
2. The combination of the knobs A. having in their shanks openings F and
rectangular recesses E extending from the outer lateral edges of said openings,
spindles B having shoulders D, and heads H at their extremities, coil springs C,
around said spindles and confined between the knob shanks and the shoulders,
collars G forined integral with said spindles, hub J provided with opening K
enlarged at the centre and corresponding at its ends to said heads, and recesses
formed in the end walls of the openings K substantially as shown and described.
Dated this 10th day of November 1885