Improvements in Knobs or Handles for Doors, and the Methods of Attaching the same to the Spindle.
Year: 1889

page_text: Date of Application, 23rd Oct., 1889
Complete Specification Left, 23rd July, 1890-Accepted, 20th Sept., 1890
PROVISIONAL SPECIFICATION.
Improvements in Knobs or Handles for Doors, and the Methods of
Attaching the same to the Spindle.
I, THOMAS RUTHERFORD ASHENHURST of 71 Ashgrove Bradford, in the West
Riding of the County of York, Technical Instructor, do hereby declare the nature
of this invention to be as follows
The object of this invention is to prevent the annoyance so commonly caused by
door knobs or handles coming off. I attain this object in the following manner.
I cut on that part of the spindle which passes into the knob or handle, a series of
notches or grooves, and upon a small metal bar or lever which I place in a recess
inside the knob along with the spindle I cut a corresponding series of notches, and
place this bar or lever in such a position that the notches or teeth upon it will
engage with those of the spindle. This metal bar or lever I make secure in position
by any suitable means, such as pivoting one end to a collar or rim, such collar or rim
being in turn made fast to the knob, or I may employ a collar or rim with a recess
into which the bar or lever may fall when the knob is placed in position on the
spindle, and by remaining in such recess will keep the knob firmly in position.
In order that my invention may be understood I refer to the accompanying
drawings which represent a section and elevation respectively of a door knob with my
invention and showing one of my proposed methods of using the notched bar or lever.
A is the spindle with the notches cut on one of its sides. B is the notched bar or
lever herein before mentioned, and C, the collar or rim. In this arrangement I pivot
the bar or lever B, on the collar or rim C, the latter being fitted to the knob and made
fast as shown in Fig. 2, by means of screws or other suitable means. When the
collar and notched lever are attached to the knob it is only necessary to slide the knob
on the spindle the required distance and the teeth of the lever B engaging with those
of A keep it firmly in position. To ensure B being kept firmly in its place I may
employ a small spring at the back after the manner shown at D or any other suitable
arrangement.
When the knob is to be removed it is only necessary to unscrew the collar or
rin C, when the knob will leave it, and thus permit of being taken off and replaced
at will.
By these means I claim that I obtain the greatest efficiency in the use of such knobs
or handles.
COMPLETE SPECIFICATION.
improvements in Knobs or Handles for Doors, and the Methods of
Attaching the same to the Spindle.
I THOMAS RUTHERFORD ASHENHURST of 71 Ashgrove, Bradford, Technical
Instructor 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 :-
The object of this invention is to prevent the annoyance so commonly caused by
door knobs or handles coming off. I attain this object in the following manner.
I cut on that part of the spindle which passes into the knob or handle a series of
notches or grooves, and upon a small metal bar or lever which I place in a recess
inside the knob along with the spindle I cut a corresponding series of notches. Or I
use a a single bar with a suitably shaped end, and I place this bar, or lever, in such a
Prins 77

page_text: position that the notches or teeth upon it will engage with those on the spindle. This
inetal bar or lever I make secure in position by any suitable means such as pivoting
one end to a rim or collar, such collar or rim being in turn made fast to the knob.
Or I may employ a collar or rim with a recess into which the bar or lever may fall
when the knob is placed in position on the spindle, and by remaining in such recess
will keep the knob firmly in position.
In order that my invention may be understood I refer to the drawings filed with
my Provisional Specification, and which represent a section and elevation respectively
of a door knob with my invention, and showing one of my proposed methods of using
the notched bar or lever. The lettering refers to both figures. A, is the spindle
with the notches cut on one of its sides. B is the notched bar or lever herein before
mentioned, and C the collar or rim, the latter being fitted to the knob and made fast
as shown in Fig. 2 by means of screws or other suitable means.
When the collar and notched lever are attached to the knob it is only necessary to
slide the knob on the spindle the required distance and the teeth of the lever B
engaging with those of the spindle A keep it firmly in position. To ensure B being
kept firmly in its place I may employ a small spring at the back after the manner
shown at D, or the spring may be helical or of any other form; or I may employ any
suitable arrangement for keeping the teeth of the lever B engaged with those on the
spindle A.
When the knob is to be removed it is only necessary to unscrew the collar or
rim C, when the knob will leave it and thus permit of being taken off and replaced
at will.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1st. The use of a notched or straight lever hinged at one end to a collar or rim
which may be fastened to a door knob or handle, and which may engage with teeth
cut or otherwise formed on the spindle substantially as herein described, or such
notched bar dropping into a groove in the knob.
2nd. The arrangement and combination as herein set forth and described.
Dated this 92nd day of July 1890