US206225A - Improvement in jurglar-ajuabms - Google Patents

Description

BEST AVAELABLE COPY P. F. L. BURSTALL.

Burglar-Alarm.

No. 206,225. Patented July 23,1878.

WITNESSES ATTORNEYS.

- 'fsmrecr tile-trans STATES Q FFIGE- n ---BEST-AVAL LABLE COP annmrr r. L. BUR-STALL, or MILWAUKEE, \VISCONSIN.

ilzM-PROVEMENT IN uns LA-BPALARM-S- Specification fol-tiling part of la-Hers Patent No. 2 06, 2 2 5. dated-Inh- 23, 1878; application filed June s, 1.878.

. To an 167m, "mgy concern "Be-itkno haifI,%PmLnr 1 .lrBuus'rALL, of liiilwaii ee in'flthecounty=offlllilwaukee and isconsi ave' invented a-new and "Inuiroretl nrgla Alarm, ot -which the followingis pecification:

Burgla alarmshave heretofin'e been made which are brought'dnto action to give an lock-work-or electricity whenthe i1 owtoavhioh. they are attached is uelectrou aguet --lias-. beenused rn1-out-.ot=-action.

any intention to furnish .a

1 illheuoli -lmrglar alarm, ;;eit;hcr portable .or fixed, which aha-y *attachml to Ya ldoorior window,- and be- :co1nes;cperative FbY l-llGf jar-occasioned by an I attempt 'rtoopemthc door- 01 =.w.ind0w. 1 The '-:tlarm'#gmay 1also sheconnected-by wires to a *distant bellzorzother\signahsoas to give the alarm zbyseleetricity,:an(l in that .manner it is *especially;availablefitor attachment to safes. 'Ivalsosuseaa;pcculiardcvice for attaching the burglar-alarm =to. a'door or wi udo'w, which derviee aetsalsoasafastening to the door.

*lllyina'ention consists in clock-work and --hammcr,-vopemt'ed by an escapemeut, to strike argong. 'JEl-healarm isheld out of action by a "horscshoeor othcr permanentmagnet swinging-upon a-pin. A weightis attached to the magnct,so.that any jar will detach the ma gnet i'ronrits armature and. draw it out of the way and 'pcrmitfithehammer-to operate. The motion ot' theihammer or clock-work is utilized to give ai-is'ign'abat aidistanec by making and breaking -an=fielectrical eircuit to act upon ateleplione'or othcrsignaling device.

The alarmeis-mounted upon a plate or base, which isielampedto a-door by a screw-fastening, whiclneonsistsof. a wedge-plate to pass Between the'door alldilljitllll), andprovid ed with screws for securingthc plate to the ja-mb and a screw to clamp the burglar-alarm to the 'door. By: this means the door is fastened, and any attempt tolopcn it by violence will cause the alarm to "become operative.

In the din-wing, Figure l is an elevation of my burglar-alarm as set for action. Fig. 2 is "dc clevatioinin section, at the linemr; and

O (10-51 and means tor clamping the burglaralarm to the door.

- h,- and .Screwsfi,

. is aneleva-tion ot' ,thefastener for the -Simila-rletters'ot' reference indicate corresponding parts.-

a, is the clock-work ortrain of gearing, of an yusual or desiredcharacter, having en escapement-whecll and 'Ee-pement, 1), operating the hammer e; flfhe .eseape'ment and hammer are connected withythe arbor d, which also carries ethe .ro d ,Therod c has upon its ,outer e d-the armature f. of the permanent .Ina-gnetg. {Ellis nagu I ich allow the poles of the magnet -to-.= be raised in p osit ion. for holding pp t g isl eldbyalplate,

the -.a-rmati ire f, or bedrawndown clear of the armature .by theweiglit kh mg to the magnet;

illhe. parts are shown as Qmounted upon a wooden or, .otlier no mconduct-ing base, i, so that. theymmay be. insulated; and the base I issecnred toiathin metal plate, at, adapted to beattached to a door or other place. a is a metal bell .ordrum, attached to the plate m in such aposition that itma-y be struck by the vhammer c.

The parts described constitute a complete burglarralarm, which may be fixed perm anently in positionupona dooror window; or they may .be used as a portable alarm, in which case I attach them by the vfastening shown in Fig. 3. This consists of an angle-plate, o, havi ng a wedge, 11, which wedge is tobe forced in betwecnthe door. and its frame. The screws q, with pointed ends, are turned to cause the pointed ends to bind nponthe jamb and pre-.

vent the door being opened except by considerable violence. The angle-plate 0 also has a screw, r, w bich,whcn the fastening is secured in place, is to be used to clamp the plate m of theburglar-alarm to the door. I have shown this clamp in the position it would occupy uponthe plate at when the wedge 12 is inserted between the bottom of a door and the door sill.

The door being secured and the alarm clamped thereto, any attempt to open the door will cause ajar, and the magnet g will detach itself from the armature f, and the weight It will draw the magnet down out of the path of the armature, and permit the hammer to strike the drum n. The weight k is' to be proportionedto the strength of the magnet g, so that a slight jar will disconnect the magnet and armature;

taut signaling apparatus.

The weight k is shown as a metal box loaded with small shot and having a movable cover,

' to allow of the weight beingvaried at pleasure to suit the magnet. In some'cases the weight may be omitted, and the magnet will discounect itself and fall by its own weight. i If it is desired to send an alarm to a distance, the wires shown may be used for thatpurpose. a

s is a wire attached to the hammer-crank c and to the binding-screw t, which bindingscrew t is connected to a battery and the signaling apparatus (not shown) atthe distant point. a is a binding-screw attached to the drum n, and connected by a wire, 0, to the dis- When the alarm is set in mot-ion at the plaecwhere it is attached, t-hc cont-act of the hammer c with the drum -ncloses the circuit of the wires named and causes the distant alarm to sound. This alarm may be a bell andlhammcr operated by an electro-magnet of usual construction; or

any other well-known means for givingan alarm by the closing or breaking of an electrical eircuit'may be used. Instead of the hammer closing the circuit by contact with the drum, the motion ot the train of gearing may operate a make-and-breah wheel for opening and closing the circuit.

The burglar-alarm described may be attached to a door, windowgor other place to be guarded,-and it is applicable to a safe or vault,

to give notice, atthe place where it is-attaehed and at a distant "point, of any tamper: iug with the safe. It is readily attached a BEST AVAILABLE COP without requiring altcrations'ot' the door or window.

, I do not limit myself to precise construction ot' the parts of the alarm, as shown", as the may be garicd'wit-hout departing from the esseiitial features of my invention.

Having thus described my invention, I claim as new and desire to secure by iietters latentr 1. A permanent magnet, in combination with clock-work and a bell or drum, the magnet serving to hold the alarm out of action when the apparatus is set, and freeing itself .1;om-its armature to permit the alarm to sound when jarred or disturbed, substantially as set forth. 4 l 2. Theweight k, in combination with the swinging permanent magnetsubstaiitially 'as- 'turc mechanism 0, c, and f, the ma gniettg', and

bell or drum n, as and for; the purpose setfort-h. Y i

Witnesses: 'E. W. TALLtmix-m;

A.TT.RICIIARDS.

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