IMPROVEMENTS IN SECURING KNOBS TO SPINDLES FOR DOOR LOCKS AND LATCHES."
Year: 1881

page_text: LETTERS PATENT to James Hill, of 37, Upper Thames Street, in the City
of London, for an Invention of "IMPROVEMENTS IN SECURING KNOBS TO
SPINDLES FOR DOOR LOCKS AND LATCHES."
PROVISIONAL SPECIFICATION left by the said James Hill at the Office of
the Commissioners of Patents on the 30th September 1881.
JAMES HILL, of 37, Upper Thames Street, in the City of London.
MENTS IN SECURING KNOBS TO SPINDLES FOR DOOR LOCKS AND LATCHES."
"IMPROVE-
(1st.) Square spindle screwed or tapped on its (4) edges about three-fourths of
its length.
(2nd.) One deep groove along one of the (4) sides of spindle to about three-fourths
of the whole length.
(3rd.) Neck of knob tapped with female screw to enable knob to be revolved and
screwed on to the spindle.
(4th.) The base of neck of knob tapped right through to form two screw boxes
immediately opposite each other.
(5th.) A set-screw tapped to fit into the said screw-boxes, and the lower half of
set-screw turned plain to "sit" into the deep groove in spindle purposely arranged
to receive it.
(6th.) A revolving backplate is attached to neck of knob fitted with a short
collar, in which is an adjusting holo to pass through the set-screw.
(7th.) After the set-screw is screwed "home" the collar or backplate is revolved
and fixed (with small screw in edge of backplate) to the door.
(8th.) A rose is provided to cover the backplate, and the collar of backplate is
tapped to receive the said rose. When this rose is screwed on to the collar the
mode of attaching the knob to spindle is concealed, and no screws whatever are
visible.
(9th.) This principle of spindle is equally applicable to rim and mortice locks.
(10th.) My improved method of securing knobs to spindles is suitable for wood,
china, glass, metal, or any other material.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said James Hill in the Great Seal Patent Office on the 30th March
1882.
"IMPROVE-
JAMES HILL, of 37, Upper Thames Street, in the City of London.
MENTS IN SECURING KNOBS TO THEIR SPINDLES FOR LOCKS AND LATCHES."
The object of my Invention is to secure knobs firmly to their spindles to suit
both rim and mortice locks and latches.
The accompanying Drawing shows full sized section of said spindle, and also the
knobs attached to same, with screw adjustment and covered rose completo.
(1st.) I provide a spindle square in transverse section with a screwed thread cut
upon its 4 angles to about threefourths of its length.
(2.) A deep groove is cut along one of the four sides longitudinally to receive
end of adjusting screw.
(3.) A knob is permanently fixed to one end of spindle, and a knob for opposite
end is tapped with female screw large enough to allow same to be revolved on to
spindle.
(4.) The base of neck of loose or adjusting knob is tapped right through to
form two screw-boxes immediately opposite each other and at right angles to
spindle.
(5) A set screw is provided to fit into-the-said-screw-boxes,-the-lower-part-being-
-turned-plain-to-sit tightly into groove of spindle.
(6.) A revolving backplate is attached to neck of knob fitted with flange or collar,
in which hole is drilled to pass the set-screw through into spindle.
(7.) After the screw is passed through & fitted "home" into spindle, the collar
can be revolved and fixed to door.
(8.) A " rose " is provided to cover the backplate, and the collar of backplate is
tapped to receive the said rose.
(9.) This principle of securing door knobs to their spindles renders them equally
useful for either rim or mortice locks or latches.
(10.) This improved method of securing knobs to their spindles is applicable to
most materials that are used for this purpose, such as wood, ivory, glass, china, or
brass and other metals.
In witness whereof, I, the said James Hill, have hereunto set my hand and
seal, this Twenty eighth day of March, A.D. Eighteen hundred and eighty