IMPROVEMENTS IN KNOBS FOR LOCK SPINDLES, AND APPARATUS FOR MAKING THE SAME
Year: 1885

page_text: Making the same.
I GARRET VAN WINKLE, of Duer Street, North Plainfield, New Jersey, United
States of America; Hardware Manufacturer, do hereby declare the nature of said
invention for "IMPROVEMENTS IN KNOBS FOR LOCK SPINDLES, AND APPARATUS
FOR MAKING THE SAME' to be as follows:-
:-
This invention relates to that class of knobs, in which the knob itself is of glass,
porcelain or earthenware, to which a metal shank is affixed for the reception of the
spindle that passes into or through the door lock or latch.
In attaching the metal shank to the mineral knob, difficulty has been experienced
in preventing the parts becoming loose because the soft metal usually employed
between the metal shank and the knob becomes compressed and separated from
the knob. To avoid this difficulty, I make in the mineral knob a recess or cavity
that is undercut or dovetailed at opposite sides and I make the metal shank in two
parts, the separation running longitudinally and the inner ends of the shank pieces
stand at an angle or inclination to the other portions and these inclined ends are
inserted into the cavity with the dovetailed recesses and by closing the two outer
portions of the shank together the inner portions are spread apart in the dovetailed
recesses and the parts of the shank are held together by a pivot or screw passing
through the shank pieces and through the spindle, or else by a tubular sleeve
forced over the shank pieces or both screw or rivet and sleeve are made use of.
The metal portions of the shank are preferably forged or pressed up to shape out
of bar iron or steel, and in making the knob the recess is formed by a plug within
which is a plunger having two claws or pawls passing out at an inclination through
openings in the sides of the plug so that the cavity with the undercut or dove-
tailed recesses will be formed, and by raising the plunger the claw pieces will be
withdrawn before the plug is lifted out of the cavity.
D L 11
00
1 1
CT
100.
BREWER & JENSEN,
For Applicant.

page_text: Improvements in Knobs for Lock Spindles and Apparatus for
Making the same.
I GARRET VAN WINKLE, of Duer Street, North Plainfield, New Jersey, United
States of America, Hardware Manufacturer, do hereby declare the nature of the
said invention for IMPROVEMENT IN KNOBS FOR LOCK SPINDLES AND APPARATUS
FOR MAKING THE SAME and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement :-
This invention relates to that class of knobs, in which the knob itself is of glass,
porcelain or earthenware or other material, to which a metal shank is affixed for
the reception of the spindle that passes into or through the door lock or latch.
In attaching the metal shank to the mineral knob, difficulty has been experienced
in preventing the parts becoming loose, because the soft metal usually employed
between the metal shank and the knob becomes compressed and separated from
the knob..
To avoid this difficulty, I make in the mineral knob a recess or cavity that is
undercut or dovetailed at opposite sides and I make the metal shank in two parts,
the separation running longitudinally and the inner ends of the shank pieces stand
at an angle, or inclination to the other portions and these inclined ends are inserted
into the cavity with the dovetailed recesses, and by closing the two outer portions
of the shank together the inner portions are spread apart in the dove tailed recesses
and the parts of the shank are held together by a rivet or screw passing through
the shank pieces and through the spindle, or else by a tubular sleeve forced over
the shank pieces or both screw or rivet and sleeve are made use of.
The metal portions of the shank are preferably forged or pressed up to shape,
out of bar iron or steel, and in making the knob the recess is formed by a plug
within which is a plunger having two claws or pawls passing out at an inclination
through openings in the sides of the plug so that the cavity with the under-cut or
dovetailed recesses will be formed and by moving the plunger endwise the claw
pieces will be withdrawn into the plug before removing the plug from the cavity
in the knob.
In the drawing Fig. 1 is a section of the knob and shank complete, Fig. 2 is an
end view of the knob-shank, Fig. 3 represents the shank sections, Fig. 4 shows the
shank sections at their inner ends, Fig. 5 is a vertical section of part of the
apparatus for making the knob, Fig. 6 is a detatched view of the plunger separately
and partly in section, Fig. 7 is a sectional plan view of the plunger and the claw
pieces and Fig. 8 is a detatched view of the secondary claw-pieces and their
actuating rod.
The knob A is to be made of wood, glass, porcelain, metal or other suitable
material and it is either round oval or polygonal. There is in one side a recess or
mortise with two or more of its faces undercut or formed as dovetails and the
shank is made in two or more parts,-that is to say, there are by preference two
shank sections B and C, and a tubular cover D.
Two sections and a cover or ring have been used, but they had to be cemented
or leaded into place, I avoid this by making the shank ends c at an inclination or

page_text: dovetailed corresponding to the interior shape of the dovetailed or undercut
mortise but the shank end is parallel or nearly so in its inner and outer faces and
the outer faces are preferably convex. In consequence of this parallel form, each
shank end can be inserted into the mortise or recess with facility, the outer parts
of the two shank-sections standing divergently to each. other, as shown by dotted
lines in Fig. 1. After this has been done the shank-sections are pressed together,
and in so doing the dovetail portions are forced powerfully apart at their ends
within the dovetail mortise of the handle, and bind against the sides of the said
recess or mortise and hold the shank and knob together. To secure the parts in
this position it is only necessary to slip a tubular cover or sleeve D over and around
the shank-sections.
It will be apparent that in placing the shank-sections in position and spreading
the dovetailed portions by closing the outer ends of the sections the shank-sections
act as levers, the fulcrum being at where the two sections touch each other.
Should there be looseness of the shank in the dovetail recesses, it is easily rectified
by introducing one or more thicknesses of paper or other material between the
knob and the lever ends. If desired plaster-of-paris or other cement may be
introduced into the recess before the slank ends are entered and spread apart.
It is usually preferable to employ a tubular cover or sleeve that is slightly
tapering, in order that it may tighten upon the shank as it is forced on and prevent
the sleeve becoming loose when the knob is in use. This sleeve may also be held
more securely by the cross pin or screw, usually passed through the spindle.
If the surfaces of the shank-sections are properly finished, the screw or rivet k
alone may be depended upon for holding the parts of the shank together. The
adjacent surfaces of the shank-sections may be made with interlocking projections
and recesses at the fulcrum i. and there should be a rib or bead around the shank-
sections to bear against the surface of the knob and prevent the dovetailed portions
passing too far into the recess, and the ribs at ¹ upon the diverging ends e also
serve to hold the shank firmly into the knob.
The knob when formed of clay or other material that can be pressed in a mold,
is recessed for the shank by a plug H. that may slide through the base block K
within the mold L or preferably the mold L and plug H. are connected to the
base M and the knob is removed, after the claws P have been withdrawn by lifting
the block K by the rods Q to which a lever is applied.
The plug H is hollow or tubular and there are lateral openings in it at opposite
sides, through which project the claws P. that form the dovetail recesses for the
ends e of the shank. These claws P are united to the follower rod R by joint
pius 4 see Fig. 6, so that they are free to swing inwardly when the rod R is drawn
down, thereby drawing the claws into the plug before the knob is removed. These
claws are again projected ready for another knob to be formed around them. This
is done by raising the rod R so that the inclined inner parts of the claws come
against the central inclined stop S at the end of the plug.
When the ribs upon the shanks e are made use of I employ secondary claws T
to imprint or recess the walls of the cavity in the knob for the reception of the
said ribs ¹. In this case the rod R is tubular with a second rod U within it having
a double inclined end 10 and the secondary claws T pass through mortises in the
claws P. These secondary claws T can be projected by the double inclined end 10,
of the rod U. but as these secondary claws T have to be drawn in before the
claws P are moved I make the inclined end 10. with dovetail grooves to receive
the similarly shaped ends of the secondary claws T so that the secondary claws T
are withdrawn by drawing down the rod Ū and then the claws are drawn into the
plug by moving down the tubular rod R as aforesaid, and the pressed knob is
raised off the plug by lifting the block K.
The guide fingers 12 are fastened to the base plate M and their ends enter
longitudinal grooves in the exterior surfaces of the tubular rod R. These fingers
keep the parts in their proper relative positions and also free the grooves of
particles of clay or other foreign substances.

page_text: 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,
the
1st The combination with the knob having an undercut or dovetailed recess,
shank-sections B. C. having diverging or angular ends to be passed into the
dovetailed recess, and opened out by closing the outer parts of the sbank-sections,
and means for holding such sections together substantially as set forth.
of
2nd The combination with the knob having an undercut or dovetailed recess,
shank-sections with diverging or angular ends passed into the dovetailed recess,
and a sleeve surrounding the shank-sections and holding them together, substan-
tially as set forth.
3rd The combination with the knob having an undercut or dovetailed recess, of
shank-sections with interlocking projections and recesses and diverging ends passed
into the recess and a sleeve or collar surrounding the shank-sections, substantially
as set forth.
4th The mold and the plug, in combination with the claws and the means for
actuating the same and forming the undercut recess in the knob substantially, as
set forth.
•
5th The shank sections B. C having the projecting ends that enter the knob,
said projections being convex on their outer surfaces and having ribs or pro-
jections thereon substantially as specified.