Improvements in Electric Theft-prevention Alarms.
Year: 1892

page_text: Date of Application, 2nd July, 1892
Complete Specification Left, 2nd May, 1893-Accepted, 2nd June, 1893
PROVISIONAL SPECIFICATION.
Improvements in Electric Theft-prevention Alarms.
We, CHARLES DARRAH of the firm of Baxendale & Co., of Miller Street,
Manchester, in the County of Lancaster, Merchant and Manufacturer, and
THOMAS JOSEPH GOUGH of 159 Church Lane Gorton in the County of.
Lancaster, Electrician, do hereby declare the nature of this invention to be as
follows:-
This invention relates to electric theft-prevention alarms.
In apparatus constructed according to our improvements, the articles to be
protected from theft or unauthorised removal, are suspended from or attached to'
hooks rings or the like means for holding or exhibiting them, in such a manner that
the weight of the articles is borne by the hooks rings or other holders. Connected
with each of the holders, there is a switch or circuit closing device, which is held
open by the weight of the article held by or suspended from the holder, so that so
long as the article is in its place, the electric circuit remains open, but immediately
upon the weight of the article being reduced or removed, the circuit is closed and
an alarm is given by means of an electric bell or otherwise.
Each of the holders may be arranged in a separate electric circuit, several may
be in a single circuit, or they may be arranged singly or in groups in parallel
circuits, and indicators may be employed in the circuits to shew in which the theft
is attempted. The alarm may be situated in any convenient position near to or
distant from the articles to be protected as also may be the indicators, if used.
Dated this 30th day of June A.D. 1892.
"
"
WILLIAM E. HEYS,
Agent for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Electric Theft-prevention Alarms.
We, CHARLES DARRAH of the firm of Baxendale & Company, Miller Street,
Manchester in the County of Lancaster, Merchant and Manufacturer, and
THOMAS JOSEPH GOUGH of 159 Church Lane, Gorton, in the County of
Lancaster, Electrician, 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 electric theft-prevention alarms.
In apparatus constructed according to our improvements the articles to be
protected from theft or unauthorised removal, are suspended from or attached to
hooks, rings or the like means for holding or exhibiting them, in such a manner
that the weight of the articles is borne by the hooks rings or other holders.
Connected with each of the holders there is a switch or circuit closing device,
which is held open by the weight of the article held by or suspended from the
holder, so that so long as the article is in its place, the electric circuit remains
open, but immediately upon the weight of the article being reduced or removed,
the circuit is closed and an alarm is given by means of an electric bell or otherwise.
Each of the holders may be arranged in a separate electric circuit, several may
be in single circuit, or they may be arranged singly or in groups in parallel circuits,
and indicators may be employed in the circuits to show in which the theft is
attempted. The alarm may be situated in any convenient position near to or
distant from the articles to be protected as also may be the indicators if used.

page_text: In order that our invention may be more clearly understood we have hereto
appended a sheet of drawings reference to which is hereinafter made.
Figure 1 represents a sectional view of one of the holders mounted upon a board
and in the position in which it is held by a suspended article, the circuit being open.
Figure 2 is a similar view of the holder when the article has been removed and
the circuit closed.
Figure 3 is a back view of the board shewing the connections.
The preferred form of holder consists of a metallic case A containing within it
the metal contact breaker B formed with a hook C upon which various articles
may be suspended. The contact breaker B is in electrical communication,
preferably through its pirots D, with the case A to which one of the wires of the
circuit is connected by the screw G. The other wire is connected to the screw
stop E.
When any article is suspended from the hook C its weight moves the hook
backwards, as the point of suspension is in front of a vertical line passing through
the pivots D. The contact breaker B is consequently moved forwards. The
movement of the hook compresses a suitable spring F.
Upon the removal of the suspended articles the spring F moves the hook and
contact breaker the latter coming into contact with the stop E and completing the
circuit.
The holder is preferably mounted upon a board or back H.
It is of course obvious that many equivalent forms of apparatus in which the
circuit is broken by the weight of an article and closed by its removal, may be
employed without departing from the spirit of our invention.
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―
An electric theft prevention alarm constructed arranged and operated substan-
tially as hereinbefore described and as illustrated by the accompanying drawings.
Dated this 1st day of May A.D. 1893.
WILLIAM E. HEYS,
Agent for the Applicants.