IMPROVEMENTS IN ATTACHING THE INSIDE HANDLES OF CAR- RIAGE DOORS TO THEIR SPINDLES, WHICH IMPROVEMENTS MAY ALSO BE APPLIED TO THE ATTACHING OF DOOR AND OTHER KNOBS TO THEIR SPINDLES
Year: 1864

page_text: PROVISIONAL SPECIFICATION left by Eli James Harrison at the Offico
of the Commissioners of Patents, with his Petition, on the 4th November
1864.
I, ELI JAMES HARRISON, of the Firm of Grice and Harrison, of Birmingham,
in the County of Warwick, Coach Smiths, do hereby declare the nature of the
said Invention for "IMPROVEMENTS IN ATTACHING THE INSIDE HANDLES OF CAR-
RIAGE DOORS TO THEIR SPINDLES, WHICH IMPROVEMENTS MAY ALSO BE APPLIED TO
THE ATTACHING OF DOOR AND OTHER KNOBS TO THEIR SPINDLES," to be as follows:-
My Invention consists of the improvements herein-after described in
attaching the inside handles of carriage doors to their spindles, by which
improvements the unsightly screw nut situated at the end of the head of the
handle and in the front thereof, which is commonly employed to attach the
spindle to the said handle is done away with, and a neater attachment effected
than by the ordinary method. My Invention is also applicable to the attaching
of door and other knobs to their spindles.
In attaching an inside carriage door handle to its spindle according to my
Invention I construct the parts in the following manner :-I provide the head
of the handle with a cylindrical or other shaped boss having a square hole in
its axis, the said hole passing nearly through the whole length of the said boss
or head. In the front of the said boss or head a circular recess or chamber is
made, which opens into the square hole in the axis of the boss or head. The
said recess or chamber is nearly of the diameter of the boss or head. The

page_text: end of the square spindle to which the handle is to be attached is made taper,
and the hole in the axis of the boss of the handle is made of a corresponding
taper figure. The extreme end of the spindle is made into a screw.
In attaching the handle to the spindle the boss or head of the said handle is
passed on to the end of the spindle, the spindle occupying the hole in the axis
of the boss, its screwed end protruding into the circular recess or chamber in
the front of the boss. A screw nut of the size and shape of the said recess
is placed therein and screwed on the end of the spindle, the said screw nut
being made to bear against the bottom or shoulder of the said recess. The
handle is thus securely attached to the spindle. In order to close the end of
the boss or head and conceal the screwed nut and screwed end of the spindle,
I make across the circular recess or chamber a taper dovetail groove. Into
this taper groove a sliding cap or cover is fitted, the inner side of the said cap
or cover being provided with a dovetail of the requisite size and taper to fit in
the said groove. By this means the end of the boss or head is closed, and a
solid appearance given to the said boss or head. In order to separate the
handle from the spindle the cap or boss is forced out of the groove in front of
the boss or head. The screw nut can now be removed from the end of the
spindle, and the handle withdrawn from off the spindle.
In applying my Invention to the attaching of door and other knobs to their
spindles, I connect the neck and shoulder of the knob to the spindle in the
manner described with reference to the attaching of the boss or head of the
inside carriage door handle to its spindle, and I attach the knob to the said
neck and shoulder by means of a dovetail and slide of the kind berein-before
described.