US388876A - Magnetic annunciator - Google Patents

Description

(No Model.) F 2 Sheets-Sheet l.

W. HUMANS.

MAGNETIC ANNUNGIATOR.

No. 388,876. t Patented Sept. 4, 1888.

N. PETERS, Flfalo-Lnhcgnpher. washington. D. c.

(No Modell) 8 sheets-sheen 2.

W. HUMANS.

MAGNETIC ANNUNGIATOR.

No. 888,878. A Patented sept. 4, 1888.

WlTNESSESS INVENTUFYI N. PETERS. mummhagnphur, wningmn. |1=CA tion to a cover that the number is visible when UNITED STATES PATENT Critica.

AMERICAN MAGNETIC ELECTRIC JERSEY.

COMPANY, OF JERSEY CITY, NEW

MAGNETIC VANNUNCEAT'OR.

SPECIFICATION forming part of Letters Patent No. 388,876, dated September 4, 1888.

Application filed July 23, 1885.

.To al whom it may concern:

Be it known that I, WILLIAM Humans, of Cambridge, in rthe county of Middlesex and State of Massachusetts, have invented a new and useful Magnetic Annunciator, of which the following is a specification, reference being had to the accompanying drawings,in which- Figure l is a front elevation of one of my annunciators, showing sixteen drops or numbers. Fig. 2 isa side view of one form of drop embodying my invention. Fig. 3 is a rear view, and Fig. 4 a lengthwise section of Fig. 2, and shows also a circuit and circuit-closer. Fig. 5 is a perspective detail of the armature and its connections. Figs. 6 and 7 illustrate a modification. v

Annunciators are usually made in one of three waysviz., the number is upon a stationary plate and there is a cover in front of the number, which cover is held in that position until opened by the index of the armature, the removal of the cover disclosing the number, and the cover is then replaced by hand or by some appropriate mechanism, commonly called a drop-raiser, second, the index carries a piece of sheet material with the number upon it, and is so arranged with relain one position and not visible when in another position, this being the converse of the rst way-thatis, inthe iirst way the cover is moved to disclose the stationary number-,while in the second way the cover is stationary and the number is moved in order to become disclosed. The third way is to use the index simply to call attention to the number.

My invention is of course applicable in annunciators on all these plans 5 but I have shown it in Figs. l to 4 as applied to cause the cover to move in order to disclose the number, and in Figs. 5, 6, and 7 as applied to cause the number to move either behind a cover with suitable apertures or simply as an index, as in the third way above mentioned.

In the drawings, A is a magnet, and c its armature, the armature being mounted on its axis, as clearly shown in Figs. 2, 3, and 4. The armature is preferably constructed as described in au application for patent tiled by Serial No. 172,435. (No model.)

me, Serial No. 172,433, July 23, 1885; but, 5o as it may be constructed in the usual way, it

is not necessary to describe it in detail. The frame which supports the armature is made up of the cross-pieces b b, which are connected by the rods b2, thereby making the armature and its supporting-frame so that the whole can be readily inserted between the poles of the magnet, the head b centering one end ofthe armature, and the connection being completed by inserting the crosspiece b iu the recesses in 6o the poles of the magnet. This makesasimple and exceedingly cheap and durable device which can be readily put together with extreme accuracy by ordinary workmen, and this combination of an armature with its mag- 55 net by means of the cross-pieces b b, connected by the rods b2, constitutes one feature of my invention.

The cross piece or head b has ears upon it, which serve as bearingsfor theindexD, which 7o in Figs. l to 5, both inclusive, is a lever, the inner end of which is iu a groove iu the end piece, d, of the armature, and the outer end of which is a latch which holds the cover F in place. The index D is adjusted in this form of my drop by the light spring d,which is carried by the block d2, and this block is adjustable by the set-screw d". (See Fig. 2.) The index D extends through a slot in the neutral portion of the magnet, as shown in Fig. 4. I 8O prefer to make a double catch on the index and on the cover F, so that in case the armature shall be attracted to either sidethe cover will be held up by the catch. The spring d' and this double catch are precautionary, for obviously a counter-weight on the lever or on the armature will answer instead; but Where feeble alternating currcntsareto be used counter-weights and springs are undesirable, and in such cases the double catch is important. 9o

In Figs. 6 and 7 the index Dis in one piece with the end piece, d,- but the construction is otherwise the same as that above described.

Another feature of my invention relates to the connections between the armature-coil and line, and consists in carrying one end of the coil to the insulating-block ff, which is rmly attached to the crosspicce l and the magnet A, and has a wire, f, secured to it, which is held in contact with the end of the wire from the coil by the screw f', (which is of course out of contact with the magnet A.) The other end of the wire from the coil is in electrical connection with the cross-piece b. The springs fzf3 are attached to the wooden shelves H of the casing of the annunciator, and are electrically connected to the line-wire. Consequently when the armature and its supporting-frame are put in place between the legs of the magnet one spring, f2, will bear upon the electrodef and the other spring, f3, will bear upon the end of the cross-piece b, as Vclearly shown in Fig. 4, and thus the armature-coil will be connected to line in a very simple and perfect manner.

'Ihe packing together of a series of my drops, as shown in Fig. l, with like poles to like poles makes one compound magnet of all the drops, and thus increases the magnetic energy of the magnet of each drop, thereby considerably increasing the efciency of each drop and making each sensitive to Very feeble currents.

The part G, to which the cover F is hinged, is shown as secured to the shelves H, but may of course be secured only to the magnet A. In Fig. 4 it is shown secured to the magnet by lips g, which are bent into a recess in the magnet.

It will be observed that when the armature and its frame are supported by the magnet, as clearly shown in Figs. 2, 3, and 6, the device is very compact and strong, and a number of them can be readily packed together or arranged upon a back board.

I have shown the index iingcr at right angles to the axis ofthe armature; but that is not essential, as will be clear to all familiar with this art.

The tablet J in Figs. l to 4, inclusive, is inserted in a recess formed in the magnet and covered by the front G, and is pressed forward close against the rear surface of front G by the spring j. This is in order that the tablets may be shifted readily, andconstitutes a feature of my invention.

The operation is as follows: The battery-circuit shown in Fig. 4 is kept open normally and closed by the ordinary push-button, too well known to require description. When the current passes, the bell shown in Fig. 4 sounds, and the lever D is moved by the partial rotation of the armature on its axis, unlatching door F, which discloses the number of the room, as indicated in Fig. l.

In Fig. 4 the door remains open until closed by the attendant and caught again by the latch Von the end of the lever D.

In Figs. 6 and 7 the armature may be operated by alternating currents and may stand normally, as shown in Fig. 6; or it may be moved in one direction by making the batterycircuit and returned by the usual drop-raiser.

XVhat I claim as my invention isl. In combination, magnet A. armature a, head b, cross-piece b, and rods b2, the magnet being rounded inside to receive the head b and recessed to receive the cross-piece b, all substantially as set forth.

2. In combination, magnet A, its armature a, cross-piece l), insulating-block f4, electrode f, shelves H H, and connccting-springsfzfi, the springs]c2 f3 being fast, respectively, to the shelves H H and connected to the line-Wire, so that putting the magnet and its armature in place between shelves H H connects the coil of the armature to line, substantially as described. l

3. An annunciator having aseries of permanent magnets arranged with like pole to the like poles ofthe neighboring magnets, the magnets being substantially uniform in size and shape, and each magnet having its armature arranged within and supported byit, substantially as described.

WILLIAM HUM ANS.

vWitnesses:

J MAYNADIER, JOHN R. Snow.

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