US104357A - Improvement in fire-alarm-telegraph apparatus - Google Patents

Description

ROGERS. :PIRE ALARM 'TBLEGRAPH' APPARATUS.

No; 104,357. Patented June i4, 1870 UNITED STATES PATENT OFM-cn,

EDWIN Roenes, onBosToN, :MA,s'siionusnTTS.

lMPROVEMNTiN FIRE-*ALARM-TELEGRAPH APPARATUS.

Specilicaton forming parl' oi"Lett`ers` l?aient No. 104,357, dated .Tune 14,1870.

To all 'whom 'it may concern;

`ne it. known that I, EDWIN noenns, of nos; toi, in the county of Suffolk and State of Massachu'setts, have invented anlmprovement in Fire-Alarm-TelegraphlApparatus; and I do hereby declare that the following, taken in connection with the drawingffwhich accompaniesand formspartof this"specification,y isa description of my invention sufficient to en able those skilled in the art to practice it.

`The invention 'relates to the arrangement of fire-,alarm-telegraph mechanism in that class of apparatus in which all the bells of the system are automatically struck from any signah box, iu 'contradistinction to giving au alarm` from any box to a central oftice, from lwhich office all thebells'of the system are struck.

In my invention the severalcircuits are so Connected that when either circuit is broken every other circuit isrst broken andthenclosed byymechanical means, (and not merely by action of the 'electric fluid and magnets,)

` the circuit breaking and closing instrument of each circuit being operatedby a weight, sp1-in g,

or. other positively-acting mechanism.

My invention consists,'priniarily, in com.- bining with each circuit otthe system a circuit breaking and closingmechanism operated `by the stress of a weight, spring, or other mei chanical device. f

The drawing represents the wires of a sysv tcm composed of two circuits connected by instruments in accordance with my improvement.

A shows the wires and instruments in plan.

B is a side elevation of them.

a, denotes the armature of an electric coil, b, of one instrument, and a2 the armature of a similar coil, h2, of the other instrument, the

armature a being on the end of one arm of a lever, d, pivoted at c, whose other arm, f, cx-

tends back through and to the front side of a frame, g, as seen at B. From this arm f project two pins, h Ii, the pin t being` belowand on one side of the other., h, and the two being at such distance apart and so arranged as to allow a linger, Ic, on an arm, l', `to slip iirst by one of them, and then, when the lever vis moved,

` t by the other. This arm lis fixed to one end of a rotary shaft, fm, carrying a circuit breaking and closiu g wheel ,ory drum, n, ,this wheel,

vbeing an insulated wheel carrying on one portion-of its periphery a metal plate, o, which, when 4brought under the ends oftwo springs, p p, connected respectively with two wires, q r, of one circuit, closes such circuit, whichpasses through the instrument 1, and connects with t the coil b2 of the other instrument, the coil b otthe rst instrument being connected by wires 'q2 #of the second circuit with the second instrument.

The shaft of the wheel a carries a pinion, t', meshing into and driven by a gear, t,on a

shaft, u, carrying a drum, upon which is wound a cord having vsuspended -to .it a weight, the stressof which `tends-to rotate the yshaft a and the shaft of the circuit-closing-wheel geared thereto.' The circuit is normally closed, the. armature being drawn to its magnet, and the lever-arm f being-raised, asseen at B; In' `this normal position of the mechanism the lin# ger k of the arm l is.l thrown forward against the pin 13 of the armature-leverf. Now, if the circuit be broken, (releasing the armature from the attraction of the magnet,) the arm f of the l,lever will bedrawn down by a spring, c, carryin g the vpin below the path of rotationof the finger il', thereby releasing lthe arm l, andallowing the circuit-wheel n to rotate by the stress of the weight. As the wheel rotates, the

plate o passes from beneath the springs p p,

and disconnects the wires q r, and breaks the current of which they form a part. The mailicircuit wires of the instrument 1 are shown at q if, connecting through the screw-cups y2 with the two poles of the battery.

' The secondinstrument is precisely like the first, and like all the' others of the alarm, (if

composed of more than two circuits.) a de- 'notes the armature; b2, the coil; d2, the arma.-

ture-levemfz, the long arm thereof; h2 t2, the two stop-pins k2, the finger arrested thereby; l2, the fin gercarrying arm on a shaft of a circuit-wheel, n2, connecting 'and' disconnecting springs p2 p2, ,connecting the main-circuit wires (12W with the rst instrument. The two circuits thus joined by the instruments (and the other circuits similarly joined, if there be more than two) .are normally closed, each finger la or k2 being arrested by the pin' i or i? in advance of it. Now, if the circuit of the iirst instru ment be broken, the armature (t being released disconnecting such lWires q2 r2,llead1ngstl1crerem. As these wires lead to the other instrument, 2. through the disconnection :attire tcircriit-wheel breaks the cncu'itof thesecondtins'trnment, cansingtlle release of thennmaturefffanl the relca-sefof the circuit-wheel :2mn from iitsrstop-pin fnf the a-r` mame-leven@ :that the'..eireiiit-wheelm2` turns, bythe stressiothe Weight);and moves fits plate :from under the :spr'in gsgzpgthus breaking the circuit "of the :second instamment, .and lso on through any' mn-rnber of circuits anjd'instru-v ments which -lbe enf-braced ,in-111e system. The :first ciwuit having th-ns been broken, fits .circuit-Wheel rotates until fthe :arm l -`comesrouml to :the pins again, :and is stoppedlby its linger l; .striking the rst (.if 'the circuit remained breken) and kns it approaches the pins its plate n afgains moves under andconnects the springs@ p, thereby closing nheeircuit of the next instrument, and the 'weight belonging to each instrument similarly operates its circuit-wheel, again connecting thesprin gs thereof, thus resuming eachcrcnt -rc-tsenorf mal or closed condition, each finger kzslippimg past the pinh when the armature is lrawnflto the magnet, and bringing up againsthe next pin z', as before described. Thus, tliongh :one circuit may remain broken, every. other circuit will be closed, or the continuity lnfallthe rest of system will be established.

0n the sha-ft of each circuit-wheel .is any composed of two blades, w w, rotationof which insures a uniform'rota-ry movement either/ircut-wheel, and to modify such movement apply each blade. w to its arm Tby za pin, n, which .permits the inclination ot' the-blader() be varied and adjusted so as to presentgreater 0r less resisting-surface, the blail'e retaining its position by friction.

A I elaim- 1n combination.iv ith several' chien-its cohvergin gat one point, circuit breaking and clos 1`ing wheels, or equivalent devices, one foreach circuit, operated by weights, springs, @requir- .a-lent mechanism to break each cirert from the one first broken, and to mechanieally'close each circuit, though the one rst broken may remain open.

EExecuted December 22, 1869.

. EDWIN Roenes.

Witnesses ,FRANCIS GOULD, GY.' CRANE.'

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