Year: 1889

page_text: I, PHILIP HENRY JAUNCEY of Lozells Road, Birmingham in the County of
Warwick Chandelier Manufacturer, 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 :-
This invention relates to that part of the fastener which secures the catch, the object
being to improve the method of securing the catch when fastened and to simplify the
method by which it is fastened.
The fastening consists of a pair of arms pivotted or jointed together in the centre,
and having one of the extremities pivotted or jointed to the catch, and the other
pivotted or jointed to the radial arm or part which supports the shade.
Fig. 1 is an illustration of the catch open and fig. 2 an illustration of it closed.
The catch A is pivotted at B on to the radial arm or support of the shade or globe.
and is also pivotted at C for the purpose of forming an abutment and pivot for the
fastening arms to work upon.
The fastening arms D and E are jointed together about in the centre at F for the
purpose of giving the necessary expansion and contraction to work the catch A and at
the other extremity G are jointed or pivotted to the radial arm or other fixed part of.
the shade or globe holder for the purpose of forming a fulcrum or. abutment for the
whole to work against.
One of the said arms have a thumb piece H attached to it for the purpose of
operating.
There is a stop piece J in a suitable position on the radial arm or support to the
shade holder for the purpose of stopping the movement just after the arms have passed
the centre which completes the fastening.
Thus it will be perceived that when the two fastening arms are straight and about
in a line with each other the moveable pivot C is pushed to its furthest extremity and
closes the end of the catch as shewn at fig. 2, also that as soon as the two fastening
arms have passed the centre or straight line they cannot move back again except by
the thumb piece and there being a stop on the opposite side neither can they move in
that direction.

page_text: As soon as the thumb piece is pulled down the jointed arms contract and form an
angular joint opening the lever catch at the same time, as shewn at Fig. 1.
Figs. 3 & 4 shew the same principle applied to a slotted lever catch, fig. 3 shewing
the slotted lever catch open and fig. 4 closed; the fastening arms working on the same
principle as described in figs. 1 & 2.
Figs. 5 & 6 shew the same principle applied to the ordinary lever fastener working
on the same principle as herein before described in figs. 1 & 2.
Figs. 7 & 8 shew a modification of the fastening by a single arm K (fig. 7 shewing
the catch open and fig. 8 closed) the single arm being jointed at the end C to the
lever catch in about the same position as at figs. 1 & 2 but instead of having
another arm to work it, it is slotted at L for working on a pin M on the radial
arm, the said slot having a suitable catch N at the extremity for securing itself on
the pin.
Figs. 9 & 10 shew the working of a catch by a single arm the catch being slotted
at O for the pin on the single arm to work in ; fig. 9 shews the catch open and fig. 10
closed, this may also be applied to Figs. 1 & 2.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what 'I
claim is :-
1. A catch fastened by means of an arm jointed to it, or sliding in it at C and
having a suitable stay or abutment as substantially set forth.
2. A catch fastened by means of a pair of arms jointed together in the centre and
also jointed at one extremity to the catch C and at the other extremity to the radial
arm G the said fastening being effected by pressing the two arms past the centre until
they abut against a suitable stop as substantially set forth.
3. A catch fastened by means of a slotted arm working on a pin as substantially
set forth.
4. A catch fastened substantially as hereinbefore described and illustrated by the
accompanying drawings.
Dated this 23rd day of February 1889.
PHILIP HENRY JAUNCEY.