US1738508A

US1738508A - Alarm switch mechanism

Info

Publication number: US1738508A
Application number: US253433A
Authority: US
Inventors: Bonnell Morgan
Original assignee: Individual
Current assignee: Individual
Priority date: 1928-02-10
Filing date: 1928-02-10
Publication date: 1929-12-03
Anticipated expiration: 1946-12-03

Description

Dec. 3, 1929. M. BONNELL 1,738,508

ALARM SWITCH MECHANI SM Filed Feb. 10. 1928 ATTORNEY Patented Dec. 3, 1929 i ,MORGAN V'isieiviviirnn, orcLARKsvrLnE, rnNNsYnvANmf .A LARQYI SWITCH MECHANISML Application filed `February 1 0, 1928;. Serial-No.. 2535433..

My; invention relatestocertain new and useful improvements, -in'burglar-and lire alarm:l mechanisms and. itv primarily; has for its;` objectl, tof provide a `simple inexpensive .)vayutoyprotect buildings against unlawful,

entry. and; againstA lire.

Itis anrobjectf of the invention, to, provide.

anralarm mechanism. preferably ofthe open.-

circuit type which can lbe installed in. a. 1building .by almost anyone` having speciali. 'electricalknowledge or. not and' at a cost,`

that is practically nominal;

@then ob]l ectsy will,v n vpart in- 4partzbe pointed outi hereinafter;

b To1the `attainment of. the: aforesaid objectsf andfends, Amy invention.y consists in the novelV detailsxof construction, andin the combina:

tion, eonnectionand arrangement of parts,

hereinafter more fully described and the Z'jpointed outv inthe claims. Y

Inithedrawings:

Figure l is.4 adiagrammatic perspective viewy ofa portion ofa room illustrating-the applicationof myl invention.

2li. view-fof'one-.of the f circuit making and breaking members andthe conductor wires on which the same is mounted and with which it cooperates to open and close the w circuit from battery to bell Figure Bis a detail sectional view of a part of my invention.

In the drawing in which like numerals of reference indicate like parts in all the liggffures, l represents the walls of the room, 2

a door and 3 a window.

In carrying out my invention I run a pair of parallel insulating wires lf-ta around such portions of the room as are nto be protected, and above the door and window I remove a portion of the insulation from each wire. The lower wire is connected to one of the terminals v5 of the signal (bell or other suitable signal) and Mathe other terminal of which is electrically connected to the battery 6 or other source of electrical energy. The upper wire 4 connects to the battery or source of electrical energy 6 also.

5&1 Mounted on the portion 7 of the lower l0 whichisjso arranged that iti can be Figure 2 is an enlarged detail perspective wirel fromwhichthe insulationA has been yremoved. is al bell` crank circuit closer 8,` which may consistof astout wirebenttof form bearing earsfSaandfngersb and189, the finger 8br lying." between theV insulation portionl 7. of. the, upper wire 4 and thev wall and adapted by` gravity. to. fallA over-intor contactwith the upper wire and` close the signal circuit. When thejpartto be protected is. the door that door. is .provided-A with a cleatj9 which servestofhold the mem-,j

. ber 8 inV the circuit-open'position when theUV beobvious .and

door is closed but will permit it to. move to` the circuit-closed position asy soon, as` the door is partiallyy opened.

In order that lthe member 9 protecting the door may be. rendered inoperativey dur ing suchtimes as the occupants of the., building are desirous. ofrleavingVv the door unprotectedI provide aI turnable member a moved inA one position tohold themember 8- in acircuit-hopen; condition and. can be moved tol` anotherv position` to'A` allow thaty member jto function properly- When the invention n is used in., connection with thefwindow to'be protected If provide a pivoted lever llmounted.- onthe window-.- Y framefin position,tobeengaged by a` fingen 12 securedtothe movablewindow sashland'soV connect the;` lever ll-`l by anrod-likef. connecy tion 13 to the member 81 sothatuwhenthe; window isfV closed. the finger-1 12-y will Apush on one end of theleven 11,;thereby" raising thel other end and; causing; the rod y113 tohold; 8D. thev memben 8- inthe` circuit-open position. -v As soon, howeven, asi/the window is.slightly raised gravity acting/oir.r the overweighted end of the lever 11:l willfpermit it tiomove to allowthe member 8 to-close tl'ie'ngerg,

Inl order,v to, employmy invention as a., fireY alarm: I providefaffusiblef orl burfnablel member le: andy connect it. by.;y afv rodflilae` member 15 with: a member 8 soi that the` memberr 14:l will hold thevrodl upA and:A thel memben 8 inthe; cineuitfopen position under.- normal; position, but, upon; burningorf fusing` the member. lewill: permit? the: rodi. L5A y todrop; thereby` permitting the 1. member 8 to` gravftateto: ythe Ycircuit-closed position.

It is obvious from the foregoing that the signal and source of energy 5 and 6 respectively ma be placed either inside of the room or uilding being protected, or the same may be located at a distant point, as for instance in a central protective agency or police or fire station.

From the foregoing description it is thought the construction, operation and advantages of my invention and its extreme simplicity Will be understood by those skilled in the art to Which it relates.

What I claim is:

1. In electrical alarm mechanism, a pair of insulated conductor Wires having portions exposed, means for securing said Wires adjacent the exposed portions to hold said Wires approximately parallel, a circuit making and breaking member pivotally mounted on one Wires exposed portion and itself having a portion adapted to be brought into contact With the other Wires `exposed portion at times, and means for operating said circuit making and breaking member the insulation of said Wires serving as limiting abutments to restrain said circuit making and breaking member against substantial movement along said Wires.

2. In electrical alarm mechanism, a pair of insulated conductor Wires having portions exposed, means for securing said Wires adjacent the exposed portions to hold said Wires approximately parallel, a circuit making and breaking member pivotally mounted on one Wires exposed portion and itself having a portion adapted to be brought into Contact With 'the other Wires exposed portion at times, means for operating said circuit making and breaking member, said circuit making and breaking member comprising a Wire provided With tWo spaced eye portions by Which it is mounted, a contacting finger portion, and an operating lever portion, the insulation of said Wires serving as limiting abutments to restrain said circuit making and breaking member against substantial movement along said Wire.

3. In an electrical alarm mechanism which includes a pair of conductor Wires, the combination With such Wires, of a circuit making and breaking member pivotally mounted on one of said Wires and in electrical contact therewith and itself having a portion adapted to be brought into electrical contact with the other Wire at times by gravity, a movable means having provision normally holding said member in the circuit-open position and adapted to become disengaged therefrom when in an abnormal position, and other means associated with the adjacent structure to render such member inoperative at Will.

4. In an electrical alarm mechanism which includes a pair of conductor Wires, the combination with such Wires, of a circuit making and breaking member pivotally mounted on one of said Wires and in electrical Contact therewith and itself having a portion adapted to be brought into electrical Contact With the other Wire at times by gravity, a movable means having provision normally holding said member in the circuit-open position and adapted to become disengaged therefrom When in an abnormal position, and other means associated with the adjacent structure to render such member inoperative at will, said last named means comprising a member operable to engage with said circuit opening and closing member to hold it against the action of gravity.

5. In an electrical alarm mechanism, a pair of insulated conductor Wires having portions exposed, means for securing said Wires adjacent the exposed portions and to one side of the part to be protected by the alarm mechanism and holding said Wires approximately parallel, a circuit making and breaking member consisting of a Wire bent into an approximate U-shape with the legs of the U twisted around the exposed portion of one of said Wires and spaced apart to form a pivot, one of said legs being extended to provide a finger to engage the exposed portion of the other Wire when said circuit making and breaking member is in one position, the other leg of said U-shaped member being extended, and means associated with said last named extended leg for holding said circuit making and breaking member in the circuit open position, and means cooperating With the U-shaped portion of said circuit making and breaking member normally to hold said member in the circuit-open position, said circuit making and breaking member adapted to move to the circuit-closed position by gravity.

MORGAN BONNELL.