IMPROVEMENTS IN FIXING DOOR HANDLES TO THE LATCH SPINDLES
Year: 1885

page_text: We JOHN DEWAR MORRISON Junior of 38 Warwick Street Gateshead in the
County of Durham Boiler Smith and ALFRED EMLEY of 7 Ellison Place in the City
and County of Newcastle upon Tyne Engineer do hereby declare the nature of our
said invention for "IMPROVEMENTS IN FIXING DOOR HANDLES TO THE LATCH
SPINDLES and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement :--
27
.
Our invention relates to improvements in the construction of certain parts of the
handles for operating the latch bolt in. the lock piece of doors whereby keys, pins
or set bolts, to fix the knob of handle on the bolt or spindle are entirely dispensed
with, while a perfectly secure attachment is effected; and consists in making the
square latch bolt or spindle with a screw cut on it at one end, the rose piece or
washer having a corresponding tapped centre boss formed on or attached to it.
The loose hand knob has a square hole in it to fit on end of bolt or spindle and is
secured on same by being attached to the rose-piece or washer in such a manner
that when the latter is screwed to the door they cannot be detached.
To effect this we form in the front of the rose-piece or washer a circular groove
the outer rim of which forms a circular aperture, eccentric to the centre of the rose.
The end of neck piece of knob is formed with an eccentric flange corresponding to
the aperture in rose-piece and when this flange and the aperture of groove are
coincident in their eccentricity the flange enters the groove and the rose being
turned partially round and screwed to door, the handle is securely fixed in the
groove, in which it can turn sufficiently to operate the latch bolt in opening the
door but not so far as to allow the neck piece to come out of the recessed groove-
The recessed groove may be formed in the handle knob, the eccentric flange being
formed on the rose piece or washer, but we prefer the first named plan.
Our invention is adapted to either mortise or rim locks and to handle knobs and
roses of any material but the recessed groove and eccentric flange will be preferably
of metal or hard material and the tapped centre boss of rose we propose preferably
to make of iron or hard metal to preserve the screw thread. Although equally
applicable to all qualities of door furniture it is specially applicable to the ordinary
ittings of "rim "locks as its simplicity of construction enables it to be very cheaply
Pin 77

page_text: produced, while the mode of attachment throws all strain direct on the square
spindle instead of, as in ordinary fittings, upon the screws which attach the rose to
the rim of door.
DESCRIPTION OF DRAWINGS.
Figure 1 is a section through a door with rim lock with cominon brass knobs and
rose fitted according to our invention.
Figure 2 an end view in section (on line a b Fig 1).
Figure 3 a section of knob with covering collar.
Figures 4, 5, 6, and 7 shew side and end views partly in section of handle
furniture of higher quality with china knobs fitted with brass mounts and shewing
various methods of forming the screwed boss of rose The same letters refer to
corresponding parts on all the figures-A is a latch bolt or spindle screwed as
shewn B is a boss preferably cast with or into or attached to and forming part of
the rose C (shewn as with dovetail rim the rose being cast round it) and tapped
to work on screw. C is the rose to screw to door having on its face a circular
groove D formed between it and the face of screwed boss B the opening into
The neck of handle knob K has an
which groove is eccentric to centre of rose.
eccentric flange E which enters the opening in rose and, the latter being turned
half round, into the position shewn by Figure 2, the flange is securely locked in
the groove D. The rose being now screwed to the door prevents any possibility of
unlocking as the handle K and the bolt or spindle A can only turn so far as to
open and close the latch. A collar F may be formed on neck of handle to steady it
in working and covers the small portion of aperture in rose left vacant, as shewn
On
on figure 3, on which the screwed boss B is shewn soldered into the rose.
Figures 4 and 5 the screwed nut B is cast solid on the rose C in which is formed
the groove D. The eccentric flange E is formed on end of a brass bush G fitted
into neck of knob K which is of china and a screwed collar H receives an orna-
mental china false rose R-bushed with brass and tapped. Figures 6 and 7 shew
a modification in which the screwed nut B is fitted to rose C by a dovetail rim
with solder rim into the cavity S the rose itself is brass ornamented and the china
knob K is mounted with brass.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is
The method of adjusting and fixing the rose upon the spindle, by a screwed boss
formed upon or attached to the rose, in conjunction with the method of securing
the knob or handle to the rose by an eccentric flange formed thereon fitting into
and locking in a circular groove with an eccentric aperture in the rose or vice-versa
substantially as shewn and described.
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