US472440A

US472440A - William c

Info

Publication number: US472440A
Authority: US
Publication date: 1892-04-05
Anticipated expiration: 1909-04-05

Description

(No Model.)

W. C. DILLMAN.

ANNUNGIATOR. No. 472,440.

Patented Apr. 5, 1892.

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W MMM A TTUHNEYS UNITED STATES PATENT OFFICE.

VILLAM O. DILLMAN, OF BROOKLYN, ASSIGNOR TO OXVEN VALSH, OF

NEW YORK, N. Y.

ANNUNCIATOR.

SPECFICATION forming part of Letters Patent No. 472,440, dated April 5, 1892.

Application tiled December 22, 1891. Serial No. 415,864. (No model.)

To all whom t may concern:

Be it known that I, WILLIAM C. DILLMAN, of Brooklyrnin the county of Kings and State of New York, have invented a new and Improved Annunciator, of which the following is a full, clear, and exact description.

My invention relates to improvements in that class of annunciators which are used in connection with speaking-tubes to announce when a person is at one end of the tube and wishes to converse with a person at the other end.

The object of my invention is to produce an extremely simple and cheap annunciator which may be easily applied to any ordinary speaking-tube and which may be easily operated bythe breath so as to momentarily close a circuit in which an electric bell is included, thus ringing the bell and attracting attention to the tube, and also breaking the circuit quickly, so as to avoid excessive ringing of the bell and exhaustion of the battery.

To this end myinvention consists in an annunciator the construction of which will be hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar figures and letters of reference indicate corresponding parts in both views.

Figure 1 is a broken vertical longitudinal section of the annunciator embodying my invention, showing also a diagram of the electric circuit; and Fig. 2 is a crosssection through the tube on the line 2 2 in Fig. 1.

The tube 10 is of the usual kind and is supported at its mouth in a wall 11, the end of the tube being carried by a flange on the faceplate 12, which is secured to the wall, and to which is hinged a lid 13, having the usual mouth-piece 11 and having the ordinary slide- Valve 15, which normally closes the mouthpiece, but which is raised when the tube is to be used. On the back of the lid 13 is acatch 16, which is adapted to be engaged by a swinging latch 17, mounted in a recess of the wall 11, and the latch thus holds the lid in a raised position. Above the latch is a Inagnet 18, which is supported by an arm 19, and when the annunciator is used the circuit through the magnet is closed, thus raising the latch 17, which serves as an armature, and releasing the lid 13, which will drop by reason of the weight of the mouthpiece and will rest upon a guard-rail 20, as shown by dotted lines in Fig. 1.

The above construction is shown in the United States Patent No. 456,803, dated July 2S, 1891, and forms no part of this invention.

If desired, any other suitable catch maybe used, or the annunciator may be operated without regard to the operation of the lid. Adjacent to the mou th of the tube and within the bore thereof is an air-chute 21, which is of a tapering form, the wider end opening toward the end of the chute opposite the mouth, and the narrower end of the chute terminates beneath a perforation 22 in the upper wall of the tube 10, and this perforation is normally covered by a swinging contact-arm 23, which is very light, so that it may be easily raised by the breath, and which has a cup-like free end 24, which covers the perforation 22, and which by holding the air enables the contact to be easily raised. The contact-arm 23 is pivoted on a support 23a on the top of the tube 10, and the contact-arm forms one terminal of an electric circuit, which includes a bell and which will be described below. Above the free end of the contact-arm 23 and in the path of the said arm is another contact 25, which is secured to an insulating-block 2G on the top of the tube and which forms the other terminal of the bellcircuit. The bell 27 is the ordinary electric bell and may be arranged in any convenient place adjacent to the mouth of the tube.

The current for operating the bell is supplied by a batteryA, which connects by a wire a with the contact-arm 23 and by a wire a with the magnet 1S and with one binding-post of the bell 27. The other binding-post of the bell connects by a wire a2 with the contact 25. When the

contacts

23 and 25 touch, the circuit will be closed and will be from the battery A through the wire a, the contact-arm 23,

TOO

that the air will be somewhat condensed and will pass upward through the tube with considerable force.

I am aware that it is not new to operate a swinging contact bymeans of air blown through a speaking-tube, so as to close a circuit through an electric bell, and I do not claim` this feature, broadly, as my invention, but claim the mechanism shown, which enables the operation described to be easily performed.

Having thus described my invention, I claim as new and desire to secure by Letters Patentl. The combination, with the perforated tube and the air-chute mounted within the tube and terminating beneath the perforation, of a swinging contact mounted above the perforation and forming one terminal of a circuit whichv includes a bell, and al fixed contact forming the other. terminal and arranged in the path of the swinging. contact, substantially as described.

2. The combination, with the perforated `tube and the air-chute arranged to divert air through the perforation, of a swinging contact mounted upon the tube and having a cup-shaped free end to cover the perforation,

,said contact forming one. terminal of an electric circuit which includes a bell, and a fixed contact forming the other terminal and ar ranged in the path of the swinging contact, substantially as described.

WILLIAM c. DILLMAN.

Witnesses WARREN B.,HUfrcHINsoN, C. SEDGWICK.