US117979A - Improvement in electro-magnetic annunciators - Google Patents

Description

UNITED STATES JACOB OAPRON, OF NEW YORK, N. Y.

IMPROVEMENT IN ELECTRO-MAGNETIC ANNUNCIA'TORS.

Specification forming part of Letters Patent No. 117,979, dated August 15,' 1871.

To all whom it may concern:

Be it known that I, JACOB GAPRON, of New York, in the county of New York and State of New York, have inv lnted a new and useful Improvement in Hotel-A nuneiators, and I do hereby declare that the following' is a full and exact description of the same, reference being had to the accompanying drawing and to the letters of reference marked thereon.

This invention relates to that class of annunciators for hotels, te., which is operated by electricity 5 and consists in certain details of construction, which will be fully described hereinafter.

In the drawing, Figure I, sheet I, represents a rear elevation of my improved annunciator; Fig. 2, sheet 2, a side elevation; Figs. 3, 4, and

l 5, sheet 2, views of parts detached; Fig. 6, sheet 3, a top view 5 and Fig. 7, a front elevation.

To enable others skilled in the art to make and use my invention, I will now proceed to describe fully its construction and manner of operation.

This annunciator is provided with a face-plate for displaying the numbers designating the different rooms of the house, these numbers being covered ordinarily by a pivoted plate hung upon one side of its pivot, which is caused to fall or swing downward for the purpose of exposing the number, by suitable mechanism operated by wires connecting with the different rooms. The operation of the mechanism which exposes the number also causes a gong to sound, by which means the attention of the clerk is obtained. Suitable mechanism is also provided for the purpose of restoring the covering-plates to their former positions after the call has been answered. The numbered display-plate, the covering-plates, and tumblers or dogs by which the latter are operated, and also the slide and crank for restoring the coveringplates to place again, are each and all of them fully described in mypatent of December27 1870, and they need not, therefore, be particularly referred to here. My invention in this instance particularly relates to the mechanism by means of which the dogs or tumblers of the coveringplates are permitted to fall, and also to the mechanism for operating the gong.

The mechanism for ,operating the dogs of the covering-plates is as follows: A metallic frame, B, is caused to project at right angles from the supporting-board of the tumblers from a point at a suitable distance above each tumbler, upon whichis located an electro-magnet, the armature of which is lconnected to the short arm of the elbow-lever O. The long arm ofthe lever O eX- tends over the tumbler, and is provided with a slight projection, c, Fig. 5, against which the long ringer a of the tumbler A rests when the covering-plate is in position. The electro-magnet is connected by suitable wires with any proper battery, and with the room which the number designates. At a suitable point in the room is located a circuit-breaker consisting of a disk, D, sheet 2, provided with a knob, d, having a sliding shank through a suitable socket, as shown. The reverse side of this disk is provided with a stud having an insulated screw, d', to which one of the wires is connected, as shown. The other wire is directly attached to the disk in any suitable manner.

Fromthis description it will be observed that the current is ordinarily broken, as there is no connection made between the insulated screw d and the disk. I/Vhen desired, however, a connection may be easily made by pressing in the knob, in which case its shank will touch the screw-pin d, and thus complete the circuit. When it is desired, therefore, to notify the clerk at the ofhce that something is wanted in the room, the occupant thereof presses in the knob d, and thus .completing the circuit causes the electro-magnet to act and attract its armature attached to the elbow-lever, by which means its short arm is depressed and its long arm correspondingly raised. This elevation of the long arm of the lever deprives the dog or tumbler of the support against which it rested, and consequently the overbalanced covering-plate is permitted to fall.

The arrangement of wires is as follows: One main wire, m, is provided, to which one of all the pairs of wires leading from the rooms is connected. The other wire mf of the pairs is led di` rectly to a spring-plate, a, the free end of which ordinarily rests against the side of pin n', which is in its turn directly connected to one end of the electro-magnet. The main wire mis iirst conducted to the electro-magnet connected with the gong, into which a branch wireleads, and then to the other end ofthe electro-magnet. It will thus be perceived that ordinarily the circuit is complete through the electro-magnet operating the tumblers of the face-plates, with the exception of the break in the room, but that this circuit does not run through the gono'. As soon, however, as the tumbler is permitted to fall, a change takes place, as follows: The long iinger of the tumbler falls upon the free end of the spring-bar a below, and depresses it so that its contact with the pin a is broken. By this mea-ns the circuit through the electro-magnet operating the tumblers is broken; but by means of the tumblers a a connection is made with the metallic frame upon which the magnet rests, from which a wire leads to a plate, E, and from thence through intermediate connections to the electro-magnet operatin g the gong. As the main wire m has a branch also leading to this magnet, the latter is caused to act, and consequently its armature F is drawn down, to which is attached the gong-hammer.

It is desirable at times to have the gong sound an alarm, and for this purpose a peculiar construction and arrangement of parts is provided. The plate E is constructed with a socket in which moves a sliding shaft opera-.ted by a knob upon the outside of the ease. The inner end of the shaft is provided with a disk which rests eitherl aga-inst a standard, G or G', according to its position in the socket, when drawn backward it rests against the standard G, and when thrust forward7 against the standard G. In the former position, connection is made by means of the standard G with the base-plate of the magnet upon which rests its metallic frame from which a wire leads into the coil, and a single blow is struck upon the gonfi. When in the latter position, however, the direction of the current is changed. The wire from standard Gf leads to an insulated bar, H, which projects over the springarmature of the magnet beneath. This bar is provided with a pin, lL, which projects downward and rests ordinarily in contact with a curved arm attached to the spring-armature. The latter is insulated from the bar H, but rests upon the metallic frame ofthe magnet. It therefore follows that connect-ion is made with the magnet through the spring-armature. It follows further, therefore, that as soon as the armature is depressed by the operation of the magnet the current is broken, and consequently the magnet must cease to operate.. The spring-armature is thus permitted to rise again to position, by which means connection is again made with the spring 7L. This operation is repea-ted, and the gong caused to sound so long as the current is kept complete from the room in which the call is made. For convenience, the sliding shaft is provided with a spring and suitable means for holding it when the latter is compressed.

This machine is simple in all its parts and not liable to get out of order. i

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. The eombin ation of alever having the armature of an electro-magnet attached thereto with the dog or tumbler A, substantially as described.

2. The combination of a swinging or droppingdog connected directly or indirectly to the gong with a spring-bar or arm connected with one of the room-wires, the dog and bar being relatively so arranged that the falling ofthe former forms a new connection with the latter, substantially as described.

A dog or tumbler adapted to fall and break the circuit which has operated the electro-magnet that caused its fall, and further adapted, also, to form a new circuit with the gone'.

4. The metallic frame supporting the insulated electro-magnet which operates the dog, and connected to the gong by means substantially as described.

5. The plate E with its sliding shaft, constructed as described.

6. The combination of the plate E and its shaft with the standard Gr or G', the parts being relatively arranged as described.

7. The insulated bar H, in combination with the spring armature and a wire adapted to conduct a current through. the bar H, as described.

This specification signed and witnessed this 13th day ot' April, 1871.

/Vitnesses:

EDWIN C. CLARKE, Tnonns Banken.

JACOB UA'PRON.

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