IMPROVEMENTS IN ATTACHING KNOBS TO PROVISIONAL SPECIFICATION
Year: 1881

page_text: LETTERS PATENT to Edward Samuel Harvey, of High Cross, Tottenham,
in the County of Middlesex, Shorthand Writer, and James Brodie, of
41, Museum Street, Bloomsbury, in the said County of Middlesex, Commercial
Traveller, for an Invention of " IMPROVEMENTS IN ATTACHING KNOBS TO
PROVISIONAL SPECIFICATION left by the said Edward Samuol Harvey
and James Brodie at the Office of the Commissioners of Patents on the
18th May 1881.
EDWARD SAMUEL HARVEY, of High Cross, Tottenham, in the County of
Middlesex, Shorthand Writer, and JAMES BRODIE, of 41, Museum Street,
Bloomsbury, in the said County of Middlesex, Commercial Traveller. " IMPROVE-
MENTS IN ATTACHING KNOBS TO DOOR-LOCK AND OTHER SPINDLES."
This Invention has for its object improvements in attaching knobs to door-lock
and other spindles.
For this purpose the stem of the knob is provided with a metallic bushing with
a square hole through it corresponding to the square of the spindle.
Near one or both ends of the spindle numerous fine cuts or notches are formed
across one or more of its faces. A short strip of thin steel plate is laid onto one of
the notched faces, and one end of the steel plate is bent at right angles to form a
short projection to enter one or other of the notches. Slits are cut in the central
portion of the steel plate so as to form out of it a tongue, and this tongue is bent,
so that its end inclines outwards away from the spindle. The knob is slid onto the
end of the spindle and over the steel plate, the spring tongue being pressed in wards
towards the spindle in so doing.
When the whole of the steel plate or approximately so is within the bushing the
spring tongue springs outwards into a slot in the bushing, and thereby forms a
stop, which prevents the knob from being drawn back without the steel plate being
drawn back with it, but the steel plate cannot be drawn back, because of its bent
down end entering one or other of the notches in the spindle, and the knob is
therefore securely locked to the spindle.
Ono knob may be fixed permanently to one end of the spindle in any ordinary
and the other knob only be fixed to the other end of the spindle in the
manner above described, or both knobs might be fixed to the spindle in this
manner,
manner.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Edward Samuel Harvey and James Brodie in the Great Seal Patent
Office on the 17th November 1881.
EDWARD SAMUEL HARVEY, of High Cross, Tottenham, in the County of
Middlesex, Short-hand Writer, and JAMES BRODIE, of 41, Muscum Street,
Bloomsbury, in the said County of Middlesex, Commercial Traveller. IMPROVE-
MENTS IN ATTACHING KNOBS TO DOOR-LOCK AND OTHER SPINDLES."
"f
This Invention has for its object improvements in attaching kuobs to door lock
and other spindles.
For this purpose the stem of the knob is provided with a metallic bushing with
a square or rectangular hole through it corresponding to the size and form of the
spindle.
Near one or both ends of the spindle numerous fine cuts or notches are formed
across one or more of its faces. A short strip of thin steel plate is laid onto one of
the notched faces, and one end of the steel plate is bent at right angles to form a
short projection or tooth to enter one or other of the notches. Slits are cut in the
central portion of the steel plate, so as to form thereby a spring tongue, and this
spring tongue is bent so that its end inclines outwards away from the centre of the
spindle. The knob is slid on to the end of the spindle and over the steel plate,
the spring tongue being pressed inwards towards the spindle in so doing. When
the steel plate has entered the bushing a suitable distance the spring tongue by
its tendency to spring outwards enters a slot in the bushing, and thereby forms a
stop, which prevents the knob from being again removed without the steel plate
being also drawn away therewith, and as the steel plate is firmly fixed to the
spindle by reason of its bent down end or tooth entering one or other of the notches
in the spindle, the knob is therefor securely locked to the spindle.
One knob may be fixed permanently to one end of the spindle in any ordinary
manner, and the other knob only be fixed to the other end of the spindle in the
manner above described, or both knobs may be fixed to the spindle in the manner
above described.
A small hole is made in the handle centrally to the spring, or thereabouts; by
inserting a pin or brad-awl in this hole the spring can be pressed inwards, which
operation enables the handle to be withdrawn from the spring and spindle.
It is obvious that by simple modifications of our said Invention the spring may
be attached to the spindle by bending down both ends thereof, and thereby forming
a tooth at each end; or it may have raised portions formed by punching out the
metal, and causing such raised portion or portions to enter suitable holes in the
spindle, as herein after described.
And in order that our said Invention may be more clearly understood, reference
is made to the accompanying Drawings, in which similar parts are represented by
similar letters in the several Figures.
u is
Fig. 1 is a side view of the rectangular spindle with a portion of its length,
near each end, cut or notched on two opposite sides, as shewn, and the spring c
Jying thereupon in position, as also shewn; Fig. is a sectional view of the knob
with a portion of the spindle inserted, and held in position by the steel plate.
the knob, b the spindle, and c the steel spring. Fig. 3 is a side view of the bush,
and Fig. 4 an end view of the same; Fig. 5 is a side view of the steel plate
Fig. 6, a face view of the same; Fig. 7 is a side view of the steel plate with both
ends formed into teeth for entering two notches in the spindle instead of one.
The rectangular space formed in the bush and marked d, Fig. 3, is so made that
the spring tongue c may enter therein, and thus secure it to the steel plate.

page_text: The hole e, Fig. 2, is for the insertion of a pin or brad-awl, whereby the spring c²
can be depressed, and the bandle thereby released when desired.
"
"
It will be seen that the notches are so cut in the spindle (see Figs. 1 and 2)
that a "space
on one side is in a line with a " tooth on the opposite side, thus
affording a means of adjusting the position of the handle to the distance of half a
tooth, and by carrying out the same principle on three or four sides of the spindle
the adjustment may be made still finer, but we find in practice that the cutting of
teeth on two sides is generally sufficient. In Fig. 8 the spindle is shewn with a
row of holes drilled therein a short distance at each end; Fig. 9 is a plan view,
and Fig. 10 a side view of the steel spring arranged for this alternative plan. One
or more hole or holes is or are punched, as shewn at g, g, the burr or raised sides
whereof form a convenient plug or pin to enter the hole or holes in the spindle
shewn in Fig. 8, and thereby to secure the spring to the spindle. The holes in the
spindle may be so arranged that their centres are out of line with each other, and
such holes may be drilled on one or more or on all four sides of the spindle for
convenience of adjustment. Fig. 11 is a side view of the spindle with the spring c
in position, shewing the means of attachment with one hole only. Instead of the
provisions g, g, riveted pins may be inserted for the same purpose.
Having thus described the nature of the said Invention, and in what manner
the same is to be performed and carried into effect, we declare that what we
claim and desire to be secured to us under the herein before in part recited Letters
Patent is,
The general combination and arrangement of mechanism constituting our
improvements in attaching knobs to door-lock and other spindles, and for detaching
the same, substantially as herein before described and shewn on the Drawings, or
any mere modification thereof.
In witness whereof, we, the said Edward Samuel Harvey and James Brodie,
have hereunto set our hands and seals, this Sixteenth day of November,
in the year of our Lord One thousand eight hundred and eighty one.