US488567A - Electric annunciator - Google Patents

Electric annunciator Download PDF


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US488567A US488567DA US488567A US 488567 A US488567 A US 488567A US 488567D A US488567D A US 488567DA US 488567 A US488567 A US 488567A
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    • G08B5/00Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
    • G08B5/22Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission
    • G08B5/36Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission using visible light sources


(No Mode-1.) 3 Sheets-Sheet 1. A. L'YMAN.
No. 488,567. IX Patented Dec. 27, 1892.
(No Model.) 3 She efB -Sheeat-Z.
'No.'488,567 I PatentedD'eoZ'l, 1892.
ITNEEBE'SI (No Model.) 3 Sheets-Sheet 3.
SPECIFICATION forming part of Letters Patent No. 488,567, dated December 27, 1892.
Application filed October 26,1891.
To all whom it may concern.-
Be it known that I, ADELVIN B. LYMAN, a citizen of the United States, residing at Oleveland, in the county ofCuyahoga and State of Ohio, have invented certain new and useful Improvements in Electric Annunciators, of which the following is a full, clear, and complete description.
The-nature of my invention relates to an annunciator so constructed as not to require the resetting of the needle after the bell has rung. The mechanical parts being so arranged that the needle always indicates the location of the caller itself. The annunciator is also small and inexpensive as compared with those in ordinary use.
That the invention may be seen and fully understood by others skilled in the art, reference will be had to the following specification and annexed drawings forming part thereof.
Figure 1. is a front elevation of my improved annuneiator, showing the connections. Fig. 2. is a perspective view, in elevation showing the annunciator disconnected, with the cover removed and a portion of the bell broken away for the purpose hereinefter shown. Fig. 3. is a vertical section through the middle of the annunciator as indicated by dotted line w. :r. Fig. 1. Fig. 4 is a front view on an enlarged scale of avibrating hammer and rheotome. Fig. 5 is a diagram of the electrical circuits and connections.
Like letters and numerals of reference designate like parts in the drawings and specification.
Only two pairs of electro magnets on and b Fig. 2, are used, the mechanical arrangement being such as to cause the said magnets to perform two separate duties at the same time, viz: to ring the bell c. by attracting the armature d. and causing the bellhammer e orf as the case may be, to strike the hell 0. and at the same time attract the pivotal armature g. which causes the pin h, attached to said armature g to come in contact quickly with one of the arms 2' or i Fig. l. of the pointer j. The pointer j. is so pivoted at k. that a sudden blow of the pin it. will throw the pointer head Z beyond the center of gravity and cause it to point and remain at the name on Serial No. 409,769. (No model.)
In order to ring the same hell with two dif-.
ferentpairs of magnets it is necessary to have a double bell hammer e. and f. so as to strike the bell on either side separately. It is also necessary to have two distinct circuit breaking, and closing springs on the same armature as shown at 0. 0' Fig. 4. The springs 0. and 0. operate in connection with the insulated contact points or screws 10 and q Fig. 2. thus causing the vibrating stroke of the hammer on the bell. The springs 0 o. are normally in contact with the screws 19 g respectively. When the circuit is closed at a push button through one of the magnets, the armatureis attracted, and the spring is drawn away from its screw, thereby breaking the circuit and releasing the armature: whereupon it withdraws from the magnet, and the spring is brought back against the screw, closing the circuit and again causing the armature to be attracted. This action keeps the armature vibrating so long as the circuit is closed through either pair of magnets. The screws 19 and q can be so adjusted as to ring the bell with a quick, rapid vibration or with a-slow vibration thus enabling a person to distinguish the location of the call by the sound of th bell without reference to the indicator. For instance: If the screw 10. be so adjusted to cause a slow vibration and a call comes from the front door or side door as the case may be, it is readily distinguished without reference to the dial. While this is not necessary it is in many cases a great advantage and convenience.
If the pointer j, is pointing to Front Door on thedial Fig. 1. and the push button r or Front Door button ispushed, the bell rings and the pointer remains at Front Door. on dial. But should the button r. or Side Door.
button be pushed the pointer j, will be thrown over and point to Side Door on the dial (as shown by dotted line j. Fig. 1.) and vice versa.
When it is desired to have a third call,say, Dining Room, this same apparatus can be connected by a separate battery. The push button T is connected with the binding post J of the battery A by the wire 1 and with the binding post G by the wire 2, from which the circuit extends through the wires 3 and 4, the electro magnets 19 b, and the wire 5, to the binding post D, and from the post D,by the wire 6 to the post E, which is connected with the binding post I of the battery A, by the wire '7, thus completing the circuit. When the circuit is closed the magnet becomes energized and attracts the armature d causing the bell hammer to strike the bell just once or what is known asasingle stroke bell,thereby distinguishing the dining room call by sound of bell alone.
The push button 0" is connected with the binding post K of the battery B, by the wire 8, and with the binding post D by the wire 9, from which the circuit extends through the wire 5, electro magnets b b and the wire 4:, to the platinum point of the screwp which makes contact with the spring 0. The circuit continues through the screw 19 and spring 0 to the post F by way of the wire 10, and the wire 11 connects the post F with the binding post L, of the battery 13, thus completing the circuit. The push buttonris connected with the binding post K of the battery B by the wires 12 and 8, and with the binding post H by the wirel3,t'rom whichthe circuitextends through the wire 14, electro magnets a, a and the wire 15 to the platinum point of the screw g, which is in connection with the soft iron standard. The circuit continues through the screw q and spring 0' to the post F by way of the wire 10, and the wire 11 connects the post F with the binding post L of the battery B, thus completing the circuit.
What I claim and desire to secure by Letters Patent is.
1. An electric annunciator having a pair of oppositely disposed magnets, a vertical armature free to oscillate between the poles of said magnets and pivoted at its lower end, a pin on said armature, and a pointer pivoted on a support independent of the armature below its center of gravity, and arranged to be actuated by said pin when the armature is 0scillated, substantially as described.
2. In an electric annunciator, the combination with a pair of oppositely disposed magnets, having laterally extended pole pieces, of a vibrating bell hammer and an oscillating armature arranged vertically between said pole pieces, andpivotally supported at their lower ends, a pin on said armature, and a pointer pivoted on a support independent of the armature below its center of gravity and having a forked end, within which said pin plays to actuate the pointer by sudden contact with the arms of said fork, substantially as described.
3. In an electric annunciator,apair of magnets and push buttons connected in multiple are, with a vibrating armature common to both magnets and forming a part of each circuit, and an additional battery and push button connected directly with one of said magnets, substantially as described.
In testimony whereof I aftix my signature in presence of two witnesses.
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