An Improved Form of Electrical Locking Switch.
Year: 1889

page_text: Date of Application, 12th Jan., 1809
Complete Specification Left, 12th Oct., 1889-Accepted, 16th Nov., 1884
PROVISIONAL SPECIFICATION.
An Improved Form of Electrical Locking Switch.
WALTER NORTHCOTT NAYLOR Electrician and WALTER JAMES NAYLOR Coal
Merchant both of 36 Deptford Lower Road Rotherhithe London S.E. Electrician,
do hereby declare the nature of this invention to be as follows:-
This Invention relates to an improved form of Electrical locking Switch and is
carried out as follows:- A piece of metal preferably of a right angular shape is
pivoted, or fixed in any equivalent manner upon a slate, ebonite, or other insulated
base, upon the shorter arm or leg of the right angular or equivalent piece is formed
a notch, and at or near the end of the longer arm or leg a hole or book is formed to
which a cord or equivalent is fastened. A check spring is attached to any suitable
part of either the longer or shorter arm or leg, and a stop or stops are provided to
control its action. Upon the same or a separate insulated block is a pivoted bar
fashioned at the shorter end from its axis so as to fit the notch before described the
longer arm is also drilled or otherwise formed to receive a cord or equivalent, and
a suitable check spring is provided operating in such a manner as to securely
interlock the two bars. Suitable terminals are provided for forming electrical
connection to the interlocking device described, and provision is made for the insertion
of a fusible or other cut out. The operation of my invention is as follows. The
switch being connected up to the main or branch leads or equivalent circuit by means
of the terminals provided therefor. The current will flow through the fusible or other
cut out, the lamps, lamp or equivalent, returning through the interlocking device, or
in a direction reverse to this. By pulling the cord attached to the arm having the
notched end the bar or equivalent shaped piece engaging therewith is released, and
the circuit broken and by operating the cord attached to the bar or equivalent engaging
therewith it can be again restored.
It is obvious that the method of operating my invention now described can be
effected in a manner reverse to this if required.
My invention is especially suited for dwelling houses, halls, or on ships, and in
railway carriages; as the cords referred to can he so constructed as to harmonize
with the surroundings, the switch being hidden or covered up in the mouldings, or
panels in wall boxes or equivalent.
Dator Tonnawy 10th 1000
FRANCIS M. ROGERS,
A cant
COMPLETE SPECIFICATION.
An Improved Form of Electrical Locking Switch.
WALTER NORTHCOTT NAYLOR and WALTER JAMES NAYLOR both of 36 Deptford
Lower Road Rotherhithe London S.E. Electricians 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 an improved form of Electrical locking Switch and is
carried out as follows:-A piece of metal preferably of a right angular shane is
pivoted, or fixed in any equivalent manner upon a slate, ebonite, or other insulated
base, upon the shorter arm or leg of the right angular. or equivalent piece is formed
a notch; and at or near the end of the longer arm or leg a hole or hook is formed to
which a cord or equivalent is fastened. A check spring is attached to any suitable
part of either the fonger or shorter arm or leg, and a stop or stops are provided to
control its action. Upon the same or a separate insulated block is a pivoted bar
D 077

page_text: fashioned at the shorter end from its axis so as to fit the notch before described, the
longer arm is also drilled or otherwise formed to receive a cord or equivalent, and a
suitable check spring is provided operating in such a manner as to securely interlock
the two bars. Suitable terminals are provided for forming electrical connection to
the interlocking device described, and provision is made for the insertion of a fusible
or other cutout. The operation of my invention is as follows:-The switch being
connected up to the main or branch leads or equivalent circuit by means of the
terminals provided therefor. The current will flow through the fusible or other
cutout, the lamp, lamps, or equivalent, returning through the interlocking device, or
in a direction reverse to this. By pulling the cord attached to the arm having the
notched end, the bar or equivalent shaped piece engaging therewith is released, and
the circuit broken, and by operating the cord attached to the bar or equivalent
engaging therewith it can be again restored.
It is obvious that the method of operating my invention now described can be
effected in a mauner reverse to this if required.
My invention is especially suited for dwelling houses, halls, or on ships and in
railway carriages, as the cords referred to can be so constructed as to harmonize
with the surroundings, the switch being hidden or covered up in the mouldings or
panels in wall boxes or equivalent.
To enable the construction and operation of my invention to be more perfectly
understood, will now describe the same by the aid of the accompanying drawings in
which
Fig. 1. is a plan.
Fig. 2. is a plan the cover being removed.
Fig. 3. is a section upon line A B. Fig. 2.
Fig. 4. is a plan of modification.
Fig. 5. is an elevation of box switch the cover being removed.
1. Figs. 1. 2. 3 is the slate, ebonite, or other insulated base which may be of the
shape shewn or any other shape suitable for our purpose and be fitted or not with
an ornamental or plain cover 2, of similar or other material screwed on or otherwise
fastened to the base 1, as may be required. 3, is a right angular piece of metal
pivoted to the insulated base by stud and set screw 4, which also answers as a terminal.
A notch 5 is formed upon the shorter arm of right angular piece the longer arm
which is sometimes bent as shewn in fig. 3 having a hole 6 drilled into which, or to
a hook engaging with it, is fastened a cord or equivalent 7. A check spring 8, is
secured to a stud 9 or the modification shewn in Fig. 5 may be employed, a stop or
stops 10, as may be required are provided to control the action. Upon the same or,
in some cases a separate insulated block is a bar 11, pivoted at 12, as shewn fashioned
at the shorter end from its axis so as to fit the notch 5, in right angular piece 3.
A hole 13 is drilled or otherwise formed in the opposite end of this arm to which a
cord or equivalent 14, is secured a check spring 15, being mounted at 16 as shewn
so as to securely interlock the two bars when mounted up in the manner shewn.
Terminals 4, 17 are provided for the attachment of the ingoing and outgoing main
or branch leads. Electrical connections to the respective parts of the switch are
shewn by the dotted lines. We prefer to insert a fusible plug, wire, or other cut
out 19, as shewn, for the better protection of the lamps. The operation of our
invention is as follows --The terminals 4, 17, being coupled up to the main or branch
leads or equivalent circuit the current will flow through the fuse or cut out 19, bar 11,
right angular bar 3, and out by terminal 4, or through fusible plug 19 and the lamp
circuit returning through the interlocking device. By pulling the cord attached to
bar 3 the lower bar 11, is released from the notch and the circuit broken, the
respective parts of the switch assuming the position shewn in fig. 5.
By pulling the cord attached to bar 11, the circuit is again restored.
Fig. 4 shews a modified form of our invention in which the cords are dispensed
with and the circuit made or broken by operating the levers by hand.
Fig. 5, shews a form of box switch particularly suited for letting into walls, beams,
or narrow spaces on ship board the cover being removed to shew interior.

page_text: Our Invention is especially suited for dwelling houses halls, or on ships, and in
railway carriages as the cords referred to can be so constructed as to harmonize with
the surroundings the switch being hidden or covered up in the mouldings or panels
in wall boxes or equivalent.
In a former application No. 618/89 we have.described a switch device combined
with a lamp holder and fuse the interlocking detail of which is very similar to this.
We wish it understood however that this Invention relates specifically to the control
of main and branch electric light circuit, or circuits, and that although we have shewn
some forms of insulated bases we do not confine ourselves strictly to such as they
may be varied to suit circumstances.
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
1st. The improved form of interlocking switch mounted upon slate, ebonite, or
equivalent base formed of insulating material.
2nd. The combination in an interlocking switch for independently operating main
and branch electric light circuits of the right angular bar 3. engaging with bar 11,
the springs 8, 15, and fusible cut out 19 the whole being mounted upon a flat
insulated base and operating in the manner and for the purposes set forth.
3rd. The combination of the interlooking device mounted upon a flat insulated base
with the cords or equivalent 7, 14 for operating the same.
Dated October 19th 1280
FRANCIS M. ROGERS,
Agent for Applicants.