IMPROVEMENTS IN MEANS OR APPARATUS FOR SECURING KNOBS OR HANDLES TO SPINDLES."
Year: 1881

page_text: LETTERS PATENT to George Harper, of Lennox Road, in the County of
Middlesex, for an Invention of "IMPROVEMENTS IN MEANS OR APPARATUS
FOR SECURING KNOBS OR HANDLES TO SPINDLES."
PROVISIONAL SPECIFICATION left by the said George Harper at the Office
of the Commissioners of Patents on the 28th November 1881.
"
GEORGE HARPER, of Lennox Road, in the County of Middlesex. IMPROVE-
MENTS IN MEANS OR APPARATUS FOR SECURING KNOBS OR HANDLES TO
SPINDLES."
My Invention relates to improvements in the means of securing knobs or handles
to the spindles of door, window, or similar fastenings, and consists in the use of a
bayonet joint arrangement provided between the knob or handle and, an auxiliary
adjusting piece or collar, which fastening is subsequently secured by a detent or
locking device.
For this purpose the auxiliary adjusting piece or collar which is first screwed on
to the spindle is provided with two slots for receiving corresponding suitable
projections formed upon the neck of the knob or handle. The spindle for actuating
the main latch or fastening mechanism is formed square in section, with portions of
screw threads cut upon its angles, so that the aforesaid adjusting piece or collar is
first screwed thereon, and the knob or handle is provided with the usual square
aperture for simply sliding or fitting it on to the said spindle. When the knob or
handle is thus fitted the projections formed thereon pass into the slots provided in
the auxiliary adjusting piece or collar, which upon turning, the former become
effectually united or connected after the manner of a bayonet joint. After the
handle and the adjusting piece or collar are thus connected they are locked in this
position by means of a spring, detent, or locking device which is mounted on the
back of the said adjusting piece or collar. At the one end of this detent, lever, or
locking device, a pin or stud is provided which projects through a small aperture
formed in the adjusting piece or collar, and by depressing which the adjusting
piece or collar and the handle may be disconnected when it is desired to remove any
of the parts.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said George Harper in the Great Seal Patent Office on the 27th May
1882.
GEORGE HARPER, of Lennox Road, in the County of Middlesex. " IMPROVE-
MENTS IN MEANS OR APPARATUS FOR SECURING KNOBS OR HANDLES TO
SPINDLES."
My Invention relates to improvements in the means of securing knobs or handles
to the spindles of door, window, or similar fastenings, and consists in the use of a
bayonet joint arrangement provided between the knob or handle and an auxiliary
adjusting piece or collar, which fastening is subsequently secured by a detent or
locking device.
And in order that my said Invention may be fully understood I shall now
proceed more particularly to describe the same, and for that purpose shall refer to
the several Figures on the annexed Sheet of Drawings, the same letters of reference
indicating corresponding parts in all the Figures.
Figure 1 of the accompanying Drawings represents a pair of knobs and their
spindle, wherein the spindle is marked a, the fixed knob b, and its rose 62. The
adjustable knob to be fixed to the spindle according to my Invention is inarked c,
and its rose is marked c². Figure 2 is a view of one side of the intermediate
auxiliary collar by which I effect the fixing of the knob c to the spindle a and its
releasement therefrom; and Figure 3 is a view of the opposite side of the said
collar; Figure 4 is a plan of Figure 3; and Figures 5 and 6 are respectively an end
view and a plan of the inner end of the knob c.
The auxiliary adjusting piece or collar D which is first screwed on to the spindle a
is provided with two slots d, d, for receiving corresponding suitable projections c², c²,
formed upon the neck of the knob or handle c; the spindle a for actuating the
main latch or fastening mechanism is formed square in section, with portions of
screw threads cut upon its angles like an ordinary spindle, and the stem d² of the
collar I) has a screw thread in its interior for screwing upon the said screw on the
spindle a. The knob or handle c is provided with the usual square aperture for
simply sliding or fitting it on to the said spindle a. A spring detent or locking
catch lever fis mounted upon a centre pin f2, on the back of the said adjusting
piece or collar D. At the one end of this lever fa pin or stud g is provided which
projects through a small aperture d³ formed in the adjusting piece or collar.
the other end of the lever f is a catch piece or tooth f³ forced inwards by the
spring acting against the pin g.
At
In fixing the handles to the door, the knob b and rose 62 being upon the
spindle a, the said spindle is passed through the door or latch, and upon the end of
the said spindle projecting from the other side of the door the rose c² is placed and
secured in proper position in the ordinary way. The collar D is then screwed upon
the spindle until it is in proper position, as shewn in Figure 1, when the knob c is
slidden upon the spindle a, the projections c passing through the slots d.
The
collar D is then turned through a portion of a rotation after the manner of a
bayonet joint, and the said slots d are thereby brought away from the line of the
projections c², so that the said projections lie behind the parts i of the collar D, as
shewn in Figure 2, the spaces at c, and the cut away parts at j allowing of this
movement of the collar D. As the said collar is so moved the bevelled head of the
catch piece f³ is acted upon so that it rises against the action of the spring h, and
after the said projection c² as passed beyond the said catch piece it descends into
the position in Figure 2, and holds the parts firmly in position, so that the collar
cannot rotate, consequently as the knob c is secured to the collar D it cannot be

page_text: withdrawn from the spindle, and as the collar D is secured to the knob it cannot
be rotated upon the spindle; to effect the removal of the knob, the tail of the lever f
is depressed by pressing upon the pin g when the catch f³ is raised from before
the projection c², the collar D can then be partly rotated so that the slots d, d,
and projection c³, c², are in line when the knob c can be readily slipt from the
spindle a.
Having now described and particularly ascertained the nature of my said
Invention and the manner in which the same is or may be used or carried into
effect, I would have it understood that I do not confine myself to the precise
arrangement of parts shewn and described, as the same may be varied without
departing from the peculiar character of my Invention, but what I consider to
be novel and original, and therefore claim as the Invention secured to me by the
herein before in part recited Letters Patent is,-
The improvements in securing knobs or handles to spindles, consisting of an
intermediate collar (D), provided with passages for projections upon the knob or
handle, and a holding and releasing catch or device, substantially as herein before
described and illustrated in the accompanying Drawings.
In witness whereof, I, the said George Harper, have to this my Specification
set my hand and seal, this Twenty sixth day of May, One thousand eight
hundred and eighty one.
GEORGE HARPER. (L.S.)