US1490740A - Relay switch for clock-controlled electric signal devices - Google Patents

Description

April 15, 1924. 1,490,740

J. F. HIELSCHE'R RELAY SWITCH FOR CLOCK CONTROLLED ELECTRIC SIGNALDEVT CES Filed Feb. 15 1921 Patented Apr. 15, 1924.

UNTED STATES JOHN F. HIELSCEER, 0F SEATTLE, "WASHINGTON.

RELAY SWITCH FOR CLOCK CONTI-LOLLED ELECTRIC SIGNAL DEVICES.

Application filed February 15, 1921.

To all whom it may concern:

Be it known that I JOHN F. HmLsoHEn, a citizen of the United States, residing at Seattle, in the county of King and State of Vi ashington, have invented a certain new and useful improvement in Relay Switches for CloclcControlled Electric Signal Devices, of which the following is a specification.

My invention relates to improvements in a relay switch for electric signal systems .such as are used in hotels and other rooming houses and is an improvement upon the relay switch disclosed in my copcnding application for Letters Patent, Serial No. 226,304. filed April 2, 1918.

An object of my invention is to provide a signal system by means of which the occupants of any number of rooms may be summoned by a call bell in direct circuit with an ordinary twelve hour clock that actuates the system by previously posting the connections necessary to make contact at the desired time.

'Another object is to provide a novel means by which the bell may be cut out of the circuit by the occupant of a room after he has been called.

Further objects are tobe provided in the signal system which will require a minimum amount of wiring, which is practical and simple in construction, efficient and'reliable in operation, and which may be readily installed at comparatively small cost.

With the above and other objects in view which will appear as the description proceeds the invention consists of the novel construction. adaptation, arrangement and combination of parts hereinafter described and claimed.

I accomplish these objects by devices illustrated in the accompanying drawing, where- The figure is a view in diagram of a bell actuating mechanism.

Referring to the drawing there is shown a bell 24 of any ordinary type and having the usual two wire connections or terminals. A relay switch is provided to control the current from the battery 21 to the bell and to provide a means for normally establishing a circuit between the two. The switch is manually operable, however, to break this circuit and be retained in its abnormal po sition by the current from the battery.

The relay switch embodies a metallic base Serial No. 445,222.

leads to the terminal 42. The magnets 45 are further provided with a wire 48 that connects the same to a contact 47 that is carried by the base 30 and insulated therefrom. An armature 38 is pivotally secured to the base 30' and grounded thereto. This armature is further provided with a shunt arm 49 that is adapted to engage the contact 47 for establishing a circuit to the magnets 45 to retain the armature 38 against the poles of the same. The bell 24 is connected to the terminal 42 by means of the wire 43 and to a-contact 40 by means of a wire 41. The armature 38 is adapted to normally engage the contact 40 to complete the circuit to the bell and to be removed from this contact for breaking the circuit by pressing upon the bottom 39.

A switch 22 is included in the wire 27 which leads from the battery 21 to the terminal 44 and is intended to be closed when the bell 24 is to be sounded. After the bell has been sounded and the armature has been manually moved away from the contact 40 to break the circuit to the bell. a circuit will be established through the magnets 45 for retaining the armature in its abnormal po sition away from the said contact. The switch 22 may then be opened for breaking the circuit to the magnets and the resiliency of the armature will cause it to assume its normal position in engagement with the contact 40. The circuit to the cell 24 is then restored with the exception of the break made in the wire 27 by the open switch 22.

To trace the operation of the system it will be seen that the current will flow from the terminal 44through the contact armature 38, binding terminal 40 and wire 41 causing the bell 24 to ring and then pass over the wire 43 back to the battery 21.

a After the bell 21 starts to ring a person may stop it by pressing downwardly on the button 39 thus breaking the contact between the armature 38 and the terminal 40 and cutting the bell 24 out of the circuit. By so doing the shunt arm 49 will be brought into engagement with the contact 47 and the armature 38 will engage the magnets 45. This will close the circuit-within. the relay switch sulated contact.

30 allowing the current to flow from the terminal as through the shunt arm l9, the terminal l7 and wire d8 then through the magnets 4:5 back to the battery 2l'by Way of the wire s6. ated in the magnets 45 will hold the armature 38 out ot 'engagementwith the contact d0 as long as the circuit is closed.

hat I claim is: r

1. Theicombination with an electric bell having two'wire terminals of a battery, a relay switch comprisinga metallic base plate having one wire terminal grounded thereto and a second wire terminal insulated there- .trom, wires from said battery to each, of

said switch terminals, a pair of magnets secured to said base plate, an insulated contact carried by said base, a circuit from the in sulated terminal'ol said switch to the inan armature pivotally mounted on, said base and grounded thereto, a shunt arm, carried by said armature, a connection between said insulated switch terminal to one of saidbattery'terminals,

' and a contact connected with thes-econd bell terminal and, adapted to normally be in engagementwith said armature to close the circuit through said bell, said armature being manuallyoperable to break the circuit 1 through, said bell for establishing a, circuit through said magnetand to be. retained in The magnetism thusicresaid abnormal ,position by the magnetism of the same.

2. The combination with an electric bell having two Wire terminals of a battery, a relay swit h; comprising a metallic base plate having one wire terminal grounded thereto and a' -seco ndwire terminal insulated therefrom, wires from said battery to each of said switch terminals, a pair of magnets secured to said base plate, an insulated con tact carried by said base, a circuit from the insulated terminal oi? said switch through said magnets to the insulated contact, an .21!- mature pivotally mounted on said base and grounded thereto, a shunt arm carried by said armature, a. connection between said insulated switch terminal to one of said bell terminals, and a contact connected with thesecond bell terminal and adapted to normally be in engagement with said armature to close the circuit through said bell said armature being manually operable to break the circuit through said bell to establish a circuit through said magnets by the means said armatureshunt and said base contact and to be retained in such abnormal 'position by themagnetism of the same.

in witness whereof, i erennto subscribe my name this 5th day of February A. D. 1921.

JOHN F. HIELSCHER;

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