Improvements in Securing Spindles in Knobs or Handles.
Year: 1891

page_text: Date of Application 30th June, 1891
Complete Specification Left. 1st Mar., 1892-Accepted, 30th Apr., 1892
PROVISIONAL SPECIFICATION.
Improvements in Securing Spindles in Knobs or Handles.
We JAMES CHARLES MACDUFF, 3 Goffs Terrace, Freezy Water, Waltham
Cross, Hertfordshire Traveller and JOHN HOGG, 81 Pym Street, Nottingham,
Machinist, do hereby declare the nature of this invention to be as follows:-
A portion of the square ends of each spindle is cut away on one side equal in
depth to the thickness of a spring plate rivetted to the outer end.
The inner end of the spring engages with one of a series of ratchet teeth formed
in one side of the square hole in the knob or handle which receives the end of the
spindle, the ratchet toothed side has a hole drilled through it to admit an instrument
to press down the spring for removing the knob or handle.
By such means knobs or handles may be firmly secured to their spindles without
employing rivets or set screws.
The improvements are applicable to doors, shutters, or windows.
Dated this Twants ninth day of June 1891
H. W. GOUGH, C.E.,
Agent.
COMPLETE SPECIFICATION.
Improvements in Securing Spindles in Knobs or Handles.
We JAMES CHARLES MACDUFF of 3 Goffs Terrace Freezy Water Waltham
Cross in the County of Herts Commercial Traveller and JOHN HOGG of
81 Pym Street Nottingham in the County of Nottingham Machinist, 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 :-
A portion of one or both ends of the spindle is cut away on one side equal in
depth to the thickness of a flat spring rivetted to the outer end of the spindle.
The inner end of the spring engages with one of a series of ratchet teeth
formed in one side of the hole in the knob or handle which receives the end of
the spindle.
An orifice is formed in the knob on the side on which are the ratchet teeth to
admit an instrument to press down the spring when it is desired to remove the
knob from the spindle. By such means knobs or handles may be firmly secured to
their spindles without the use of set screws or rivets.
For convenience of manufacture we prefer to make metal knobs or handles in
two parts soldered or otherwise secured to each other.
And in order that our said invention may be the better understood we will
proceed to explain the same with reference to the accompanying sheet of drawings
in which
Fig. 1 represents a section of a spindle and door knobs constructed according to
our invention.
Fig. 2 represents a section of a spindle and door knobs also constructed according
to this invention but with one knob only removable.
Fig. 3 is elevation of spindle.
The same letters denote the same parts in all the figures.
a is the spindle b the knob and c the shank thereof in which is formed a hole
preferably square to receive the spindle a the spindle a has secured thereto by a
rivet or other suitable means a spring d at one or both ends thereof which spring
Pins Sd l

page_text: с
engages with one of the ratchet teeth e formed in the shank c aud prevents the knob
from becoming accidentally detached therefrom.
When it is desired to remove the knob from the spindle a a brad-awl nail or
similar instrument is inserted through the aperture fan the shanke and the spring d
pressed down out of engagement with the ratchet teeth e when the knob may be
drawn off the spindle.
The knob may be formed in one piece if desired but for convenience in the
manufacture of metal knobs we prefer to make it in two portions as shewn.
Knobs or handles of wood glass porcelain or similar substances are made in one
piece and a short metal tube having ratchet teeth therein is inserted into the shank
of the knob and secured thereto by cement or other suitable means an orifice being
formed through both shank and tube to admit an instrument for pressing down the
spring as herein before described.
In conclusion we would remark that we are aware that spindles have hitherto
been secured to knobs by means of a spring and ratchet for which invention Letters
Patent were granted to George Price No. 1031 dated March 10th 1881 we do not
therefore claim the use of a spring and ratchet broadly for the purpose of securing
spindles in knobs or handles but
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is
1.—In securing spindles to knobs or handles the spring d substantially as and for
the purpose stated.
II. The spindle having a spring catch attached to one or both ends thereof in
combination with a knob or handle preferably in two pieces having ratchet teeth
formed in the shank portion thereof and an orifice to admit an instrument for
removing the handle or knob all substantially as described and shewn and operating
in the manner specified.
Dated this 24th day of February 1892.
ERNEST SALAMAN,
61 & 62, Chancery Lane, London, Agent for Applicants.