US887681A - Electrical signaling. - Google Patents

Description

P. W. MAXSTADT 68 F. W. MAXSTADT, JR. ELECTRIC SIGNALING.

APPLIUATION FILED MAY 10 1907.

PATENTED MAY 12, 1908.

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FRANCISW. MAXSTADT AND FRANCIS WJMAXSTADT, JR, OF NEW YORK, N. Y.

Specification of Letters Patent.

Patented May 12, 1908.

Application filed May 10, 1907. Serial No. 372,886.

To all whom it may concern:

Be it known that we, FRANOIs W. MAX- STADT and FRANCIS W. MAXSTADT, Jr., citizens of the United States, and residents of New York, county of New York, and State of New York, have invented certain new and useful Im rovements in Electric Signaling, of'which t e following is a full, clear, and exact description.

This invention relates more articularly to alarms in which a bell is inclu ed in the electric circuit.

Heretofore, so far as we are aware, in the ordinary construction of the electric bell it has been impossible within a reasonable cost to make the same entirely dust and moisture losion where there is an escape of gas or the ike. This is caused by the fact that the bells each have a make-and-break contact, and this contact is subject to dust, moisture and corrosion, and is liable tobecome short-circuited by reason of dust, moisture, insects and the like interfering with the make-and-break in the circuit, and thus prevent the successful operation of the bell, thereby causing constant trouble and annoyance.

The primary object of the invention is to overcome the objections named and to provide a call or alarm system for apartments,

hotels and the like, in which the bell and the means for operating the same are thoroughly rotected in suchca way that the bell cannot e short-circuite'd, and in which everything is dust, fire, corrosion, insect and moisture roof, thereby overcoming many of the ob 1eotions incident to the use of the ordinary electric bell.

@this specification, and will then be Another ob'ect of the invention is to 1'0- vide means w ereby the bell is non-spar g and maybe used-in mines and powder mills so as to avoidexplosions, and which is less liable to get out of order than the usual form:

of device employed for the same purpose.

A further object of the invention is to pro vide means which may be employed in variv ous connections; which is simple n construc-' tion; which ma be manufactured at a comaratively sma cost, and in which the adustment of the bell or bells always remains the same.

The invention will be hereinafter more particularly described with reference to the accompanying drawings, which form a part of pointed Fig. 4 is a fragmentary view showin from the base will engage the edge of t out in the claims at the end of the description.

In the drawings, Figure 1 is a diagrammatic view, showm the electric connections of one means em odying our .invention.

Fig. 2 is a vertical section of the circuitbreaker, illustrating how the same may be hermetically sealed. Fig. 3 is a planview with the cover of the sealing casing removed.

aslight- 1y different form of armature for t e device shown in Fig. 2. Fig. 5 is a side elevation of the bellor alarm; and Fig. 6 is a plan view J of the bell.

In Fig. 1 is shown a plurality of bells or other alarms 10 and a s1n le circuit-breaker or device 11 included in t e electric circuit .12, and in said circuit is a battery 13 and an inde endent ush button or other device 14 one oreach ell or alarm employed, though it will be understood that only one bell may be used with the circuit-breaker, and that these various parts may be arranged in an suitable location, and in any relation wit res ect to each other.

he bell 10 has a base plate or bracket 15, and to the base late 15 are held the electro magnets 16 of t e usual construction, and g which are preferably inclosed bya suitable water-proo casing or covering and to the base or bracket 15 are the bin ing posts 17 to which the wires are fastened for connection with the'electric circuit and said ma nets. "The base 15 has an upright or stand ard 18, to the upper part of which is held a yieldin strip or p ate 19 of a resilient nature,

as bar or spring brass, and to this spring,

plate 19 is held the armature 20. This armature 20 comprises two plates held on opposite sides of the plate or strip 19, andis adapted to be attracted by the magnets1 6 when the latter are energized by the electric current in the usual way. An arm 21 projects outward from the armature, and OII-thlS arm is a hammer 22which is arranged adjacent to a bell 23, and said bell is held on an arm or upright 24, which projects at an angle 15, so that as the armature 20 is drawn toward the ma ets, the hammer hi; bell 23 and ring the same, the spring plate 19 serving to normally force the hammer bell. A wire 25 connects one of the magnets to one of the contacts of the push button 14,

and a second wire 26 leads to the circuit- 22 away from said batterya wire 28 le'ads tothe other contact of the ush button 14, so that when the con- .tacts the push button or other device, asawire 26 leadin breaker 11, and from the circuit-breaker a wire 27 leads to the battery 13, and from the other bells 10 has one contact of its push button 14 connected with a wire 29, and a wire 30 connecting theother contact with the coils of the magnets of thebells The other end of the magnet wireconnects with the I to the ma net of the circuitbreaker 11. f either of t e push buttons is o erated, the circuit will be completed t ough the wire 30,-electric bell, wire 31, wire 26, circuit-breaker 11, battery 13, wire 28, and wire 29, so that the bell will ring until the push button isreleased.

For the purpose of preventing the bells from being short-circuited and to make the bell dust, moisture, and fire proof, we provide a circuit-breaker; in. the circuit which is thoroughly protected. This circuit-breaker 11-has a base 32 which is ada ted to be secured to any support, and to t e base is held a bracket 33, to which is secured an electro magnet 34'. This magnet 34 may be inclosed by suitable material, and has its core 35 arranged adjaoent to an armature 36. This armature 36 is weighted, as at 37, to

. make the same sluggish, and this weighting of the armature is of such a character that 7 the electric bells lO'will all be-attuned so as to v or other work in unison therewith, the weight 37 being such that 'any movement of the armature 36 will cause a like res onse'from the armatures 20 of the electric ells 1( This weight 37 may be made as in Fig. 2, or the armature may be extended and an adjustable weight 38 provided on the armature as shown in Fig. 4. The armature 36 is held to a brass late 39, which is securely held to the u right portion of the bracket 33, and on the p ate or strip 39 is a' contact 40. This contact moves in the path of an adjustable contact screw 41 which is held to the end of an arm or bracket 42, the latter being supported at one end by the bracket 33, and suitably insulated from the plate 39. A casing 43 is provided so as to entirely inclose the circuit-breaker, and this casing may be of glass, metal or any suitable material, and

. may be provided with means for fasteningit to a suitable support. The casing 43 may be of any desired shape, and may be closed and 3. In electric signa ssmsi hermetically sealed by a cover 44 'or in any other desired way, and said inclosing casing may have the air exhausted therefrom, sothat the circuitebreaker may be in vacuum. The casing is provided with two binding posts 45 and 46, to one of which the wire 26 is connected, and to the other the wire 27 which leads to the battery 13. From the binding post 46 a wire leads to the electro magnet 34, and from the magnet to the late 39. wire leads from the posts 45 to t e bracket or arm 42, so that when the circuit is closed through the battery 13,'the circuit-breaker or device 11 will cause a make-and-break in the circuit, and will cause either one of the bells 10' to produce a sound according to which push button 14 is operated. By this means all danger of ex osed sparking is eliminated, and the ma e-andbreak contacts are removed fromthe bell proper and entirely closed within a sealed casmg, and as there is nomake-and-break contact on the electric. bells, the latter cannot get out of order through being short-circuited, either by corrosion, dampness or insects, which would tend to make the bell as ordinarily constructed inoperative.

From the foregoing it will be seen that 7 simple and eilicient means is provided whereby 'one or more bells may be made so that they are-not-liable to become short-circuited, andin which the bell is dust and moisture proof, and is not liable to become corroded;

and that the bell may be very cheaply made andinstalled and adapted for uses to which the ordinary form of electric bell cannot be employed,

' Having thus described our invention, we claim as new and desire to secure by-Letters Patent 1. In electric signalin a circuit-breaker comprising a bracket an an electro magnet,

a base supporting the bracket, a spring plate secured to the bracket and carrying an armature, a weight carried by the armature, an arm held to the bracket and carrying a contact thereon, a contact movable with the armature, electric connections for the con- .tacts and electromagnet, and a cylindrical transparent sealing casing entirely inclosing the parts of tile circuit-breaker, and a screwthreaded cap fitting the casing and servmg to hermetically seal the circuit-breaker within thecasing.

2. In electric signaling, a bell comprising a bracket having an upright arm, an angularly disposed arm, electro ma ets carrled by the bracket, a spring plate he d at one end to the upright part of the bracket, an armature comprising a plurality of plates carried by the spring plate, an arm carryin a harnmer hel body arranged inthe ianth of the arm.

' g, the combination to the armature, and'a be secured to the angularly disposed arm and having its with aplurality of bells each having an armature, a hammer and magnets, of a circuitbreaker having an armature attuned to work Q in unison with the-armature of the electric bells, a battery, an independent push button for each bell, and means whereby one of the bells will respond to the armature of the circuit-breaker according to which push button is operated.

4. In electric signaling, the combination with a plurality of alarms each having an armature and magnets, of a circuit-breaker attuned to work in unison with the armature of the alarms, a battery, an independent push button for each alarm, and means whereby one of the alarms will respond to the armature of the circuit-breaker accordingto which push button is operated.

5. In electric signaling, the combination with a plurality of bells each having an armature, a hammer and magnets without makeand-break contacts, of a circuit-breaker having an armature and Weighted and attuned to work in unison with the armature of the electric'bells, abatter an independent ush button, and means w ereby one of the ells will respond to the armature of the circuitbreaker according to which push buttonds operated. I

This specification si ed and witnessed this 9th a of May A. .1907.

F ANCIS W. MAXSTADT. FRANCIS W. MAXSTADT, JR. Witnesses:

M. TURNER,

L. H. LUNDIN.

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