Year: 1888

page_text: A communication from SAMUEL CRAWFORD, of London, in the County of Middlesex
and Province of Ontario, Dominion of Canada, Manufacturer.
I ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
M.I.M.E. 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 provide a means of more effectually securing the
knobs to the lock and door, and to allow for shrinkage or variation in the widths of
doors. To effect this the ends of the shanks of the knobs are attached directly to the
washer-plates instead of being fastened by set-screws to the spindles, which in this
invention are made to turn with the knobs by the engagement of their square sided
ends with the singularly shaped cavities in the shanks and knobs without being
otherwise attached to the shanks. These shanks are securely attached to the washer-
plates by means of a projection or projections on their surface lying inside the recessed
washer-plate. The cavities in the shanks are made additionally long to enable the
spindles to adapt themselves therein, and allow the ends of the shanks to be brought
close to the washer-plates in all cases whatever the width of the door may be.
In the accompanying drawings of this invention :-
Figure 1 is a vertical section of door, rim-lock,, knobs, spindle and washer-plates.
Figure 2 is a vertical section of door mortice lock, knobs, spindle and washer-
plates.
.
Figure 3 is a side view of one of the knobs, shewing the shank and spindle.
Figure 4 is an end view of this shank and
Figure 5 is a front view of washer-plate used with this form of shank.
Figure 6 is also a side view of one of the knobs and spindles, showing the shank of
a slightly modified form.
Figure 7 is an end view of this shape of shank, and
front view of washer-plate used with this form of shank

page_text: A A are the knobs and B B the square-sided cavities or recesses formed in them
and in the shanks for the reception of the square ends of the spindle C. This spindle
controls and operates the catch of the lock in the usual manner but is not attached
to the knobs except by being grasped on all sides near its ends by the sides of the
cavities in the shanks of those knobs, so as to insure its turning simultaneously with
the turning of the knobs. These cavities extend beyond the ends of the spindles so
as to allow for the various thicknesses of the doors by enabling the spindles to play
further in and out of these cavities and thus permitting of the shanks being brought
up close to the washer-plate in all cases.
D, D, are the shanks of the knobs so constructed as to have an annular channel
or groove E formed.in. or on them, F, G, being the outwardly projecting flanges or
walls of this groove or channel either extending beyond the circumference of the
.shank or a line therewith.
H, H, is a washer-plate made in two parts, which when joined together are screwed
on the door so as to allow the channel cr groove E on shank to be enclosed in their
central orifice I, the edge of which forms a collar to it. The knobs are then held in
place by the contact of the projecting flanges G of each shank with the inner faces
of the washer-plates, and are prevented from being pushed in by the flange F
bearing against the outer side of the washer-plate. The spindle C having its ends
received in the cavities B turns with the turning of the knobs as already described no
set-screw being required for its attachment:
Instead of making the inner flange G of this shank continuous round its whole
circumference it is preferably formed as shewn in Figures 6 and 7 so as to leave
only portions of it projecting in the form of studs J, J, in which case the washer
plate will be made to conform as shewn at Figure 8. Here the washer-plate is made
in one piece and the studs or projections J of shank are inserted in the extensions L, L,
of the orifice M and then turned partially round so as to engage with the inner face
of the washer-plate at the intermediate or solid parts.
In using this form of attachment of knobs of rim-locks one washer will be screwed
on the door and the other cast on or attached to the lock itself, but for mortice locks
the washer-plates will both be attached to the wood-work.
It will be seen by the above description that the old mode of attaching the shanks
of the knobs to the spindle is dispensed with. Heretofore three holes have had to
be drilled at each end of the spindle for the adjustment of each of the set screws, and
washers had to be made to fit to allow for shrinkage etc. The above described mode
dispenses with this and insures a ready and perfect fit to any door.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, as communicated to me
by my foreign correspondent, I declare that what I claim is :-
The above mode of attaching the shank of a door-knob to the washer-plate on a
door or lock by means of a groove or channel formed in or on the surface of said
shank, which is encircled by the edge of the orifice of the washer-plate and retained
therein by the engagement of the sides of the groove or of flanges with the inner face
of the recessed washer plate.