US1267165A - Fire-alarm protective device. - Google Patents

Description

M. ARNAVAS.

FIRE ALARM PROTECTIVE DEVICE. APPLICATION FILED JULY 24. 1917.

1,267, 165. Patented May 21,1918.

INVENTOR ATTORNEY WrrNgssEs 6 i ,a/g u MARIO ARNAVAS, OF SAN FRANCISCO, CALIFORNIA.

FIRE-ALARM PROTECTIVE DEVICE.

Specification of Letters Patent.

Patented May 21, 1918.

Application filed July 24, 1917. Serial No. 182,475.

To all whom it may concern:

Be it known that I, MARIO ARNAvAs, a citizen of the Kingdom of Italy, residing at San Francisco, in the county of San Francisco and State of California, have invented new and useful Improvements in Fire- Alarm Protective Devices, of which the fol lowing is a specification.

This invention relates to improvements in fire alarm signal stations.

The invention deals particularly with that class of fire alarm signal stations in which a booth is provided having a door which is automatically locked to detain the person sounding the alarm until the arrival of an authorized oflicial.

The principal object contemplated is the provision of a signal box having a magnet controlled look a apted to be released by a door controlled contact which will positively prevent transmission of a signal except when the door of the booth is closed and locked. I am aware that this object has been aimed at by previous inventors, but the contacts hitherto utilized have not been sufficiently well protected to prevent tampering in the open position of the door.

Another object of the invention is to provide a type of contact and protecting means, and mechanism therefor, which will be especially applicable to circular booths having sliding doors.

One form of the invention is described in the specification below and illustrated in the drawings.

In the drawings Figure 1 is a front elevation of the booth.

Fig. 2 is a fragmentary longitudinal section through the contact tube and associated parts.

Fig. 3 is a fragmentary view of the signal box illustrating the arrangement of the lock and controlling magnet for releasing the lock, and showing diagrammatically the electrical circuits involved.

Fig. 4 is a horizontal section through the booth on the line H of Fig. 1.

In the drawings the booth, indicated as a whole by the numeral 1, is represented as of a conventional cylindrical form. It has a door 2 which is slidably mounted for opening and closing movement as in guides 3. The door 2 is normally disposed in a position to completely close the door opening 4. It has a spring lock 5 which, however, does not become effective to lock the door until the latter has been moved some little distance beyond the normally closed position as indicated by dotted lines in Fig. 1. The lock 5 is preferably so arranged that it can only be released by employing a key in connection with an outwardly disposed keyhole 6. Suitably mounted in a convenient position in the booth 1 is the alarm signal box 7 inclosing the usual devices for signaling the central station, access to these devices being normally prevented by the door 8. A. magnetically released lock is provided for the door 8, and preferably consists of a slotted bolt 9 slidably mounted on the inner side of the door 8 for movement to engage in and disengage from a recess 10 in the box frame adjacent the door. The bolt 10 carries an armature 11 disposed for attraction by magnet 12 properly secured on the door. Preferably the armature 11 constitutes an integrally formed T-head on the end of the bolt 9. A suitable source of electricity is provided for energizing the magnet 12 when a contact 13 is closed by movement of the door 2 to the position in which the lock 5 becomes effective.

In accordance with the invention, the con tact 13 is mounted in a tube 14. toward a closed end 15. The tube 14 is secured to the booth 1, and preferably over the doorway.

An upwardly extending arm 16 on the door carries an arcuate rod 17 extending into the open end 20 of the tube 14: and is provided at the end with a contact head 18. The tube 14:, rod 17 and contact are so proportioned and arranged that the rod 17 will slide freely in the tube in the movement of the door while when the position of the door is reached in whi h it is secured by the lock 5 the contact head 18 will engage against and close the contact 13. The contact head 18 is of such size that it will completely obstruct the bore of the tube in all positions of the door thereby preventing closure of the contact 13 by the insertion of an elongated object through the open end 17.

When desired I may mount in a convenient position upon the booth 2 an electric lamp 19 which may be lighted when the door is moved to locking position to call at tention to the fact that the signal mechanism of the box has been operated.

The herein described embodiment of the invention, while considered preferable to other forms, is not to be interpreted as in any way limiting the invention. I am aware that numerous other forms may be con structed Without departure from the spirit of the invention and-reserve the right t such variations, modifications, and use of equivalents as may fall Within th'e'scope of the invention as indicated by the breadth,

of the" appended claims.

l/Vhat is claimed is: 1. The combination With the booth and signalnmechanism of a firealarm: signalstaa tion, a tube mounted on the booth, an element disposed 1n the tube and connected to the door or the booth, said element adapted door. 7.

2; The c'ombinatioirwith the booth and signal box of a fire alarmsignal station,.of a tubeimounted on the booth, an element disposed inthetube and connected to the door of the booth, said element adapted for slid- ;ing-niovement in the tube in the opening and closing; of the door and arranged to completelyrobstruct the tube in every positionof the-floor, a contact in said tube adapted to be closed by said elementinthc closed position of the door, amagnet controlling the lock of the signal box, and a circuit for said magnet including said contact.

3. The combination with the booth and signal box ofa fire alarm signal station, of a tube mounted'on the booth, an element disposed in the tube and connected to the door of the'b'ooth, said element adaptedfor sliding; movement in the tube in the opening and closing of the door and arranged to completely obstruct the'tube inr everyz-position of the door, a contact in said tube; adapted to be'closedby said element in theclosed'. position onthedoor, a magnet controlling the lock of the signal box, a circuit for said.

magnet including said' contact, and aspring lock for the door of said booth.

4:. The combination with the booth, and

signal box of a fire alarm'signal station, of a sliding door for the-b0oth, aspr 1ng lock for the door, a tube having one-end closed mounted on thebooth, a rodhaving a con-- tact head disposed Within the tube and'havingone end projecting from-the-open endof the tube and attached to the door, said contact head adapted to entirely obstruct'said tube in every position of the door, atma'g'net,

controlling the lock-0f the signal box, a

said contact and said'magnet.

Intestimony whereof I aliix my signature.

MARIO ARNAVAS;

Copies this patent may be obtained for five cents each,- by addressingtthe Commissioner of Patents;

, Washington, D. C.

contact in'said tube adapted :to be closed by: said contact'head in the closed pOSllHOIIOf the door, nd clrcult connectlons"between;

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