US617193A - Electric switch - Google Patents

Description

No. 6l7,|93. P'atantcd Jan. 3, I899. 0. H. SGHUCK.

ELECTRIC SWITCH.

(Application fllod July 2, 1898.)

(No Model.)

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UNITED STATES PATENT OFFICE.

OSCAR ll. SOIIUOK, OF PHILADELPHIA, PENNSYLVANIA.

ELECTRIC SWITCH.

SPECIFICATION forming part of Letters Patent No. 617,193, dated January 3, 1899.

Application filed July 2, 1898. Serial No. 685,053. (No model.)

"To all whom, it may concern:

Be it known that I, OSCAR ll. SCHUCK, of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented a new and Improved Electric Switch, of which the following is a full, clear, and exact description.

This invention relates to switches used in connection with an alarm-circuit controlled by the opening and closing of a door. In the ordinary arrangement of door alarms in dwellings, stores, factories, and stables there is a switch in the circuit near the door which may be turned to open the circuit when it is desired thatthe door shall remain open fora considerable length of time, and thus prevent the bell from ringing. It sometimes happens that such switch is by carelessness left open when the door is closed, thus making the alarm inoperative.

The object of myinvention is to provide a switch thatshould it be opened will be auto- Y matically closed upon the closing of a door,

and, further, to so construct it that it cannot be opened and leftopened when the door is closed.

I will describe an electric switch embodying my invention and then point out the novel features in the appended claims.

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

Figure 1 is an elevation of a switch embodying my invention, showing it as closed and in an alarm-circuit. Fig. 2 is an elevation showing the switch as open, and Fig 3 is a section on the line 3 3 of Fig. 2.

The switch is designed to be secured to a door or to a door-jamb. I have here shown it as attached to a jamb m for a door y. The switch-arm 1 is mounted to swing on a base 2, and it is held yieldingly and normally in contact with brushes 3 on the base by means of a spring 4, connected at one end to the switch-arm and at the other end to the base end 6 and the base 2 a spring 7. The end of.

the switch-arm l is provided with a lug 8, designed to engage at a certain time with a lug 9 on the plate The ing 9 is beveled or inclined on the side toward the switch-arm 1.

The switch-arm 1 has connection with a cirg cuit-wire 10, leading to an alarm 11, and from which alarm the circuit-wire 12 leads to the contact-brushes 3. In this circuit (here shown as in the wire 12) is placed a battery 13, and also placed in this wire 12 is a switch 1 t, designed to be opened in the ordinary manner when the door is closed and to be moved to its closing position by means of a spring 15 when the door is opened.

In operation while the door is closed and bearing upon the end of the plate 5 the said plate will be held in such position as to allow the switch-arm to be swung without engaging with the lug 9. Therefore upon releasing the switch-arm it will be immediately moved to its circuit-closing position by means of its spring. When the door is opened, the switch 14; will move to its closing position, thus closing the circuit and causing the alarm to sound, and the opening of the door will allow the plate 5 to be moved outward by means of the spring 7, and when in this outward position the lug 9 will be in theliue of movement with the lug 8 on the switch-arm. Therefore should it be desired to cut out the alarm while the door is to remain open for a considerable length of time the switch-arm is to be swung until its lug 8 passes over and against the rear side of the lug 9, the resiliency of the arm allowing it to pass over said lug 9. Upon closing the door it will move the plate 5 inward, and this inward movement of the plate will release the lug 9 from the lug 8, allowing the spring a to return the switch-arm to its circuit-closing position. Thus it will be seen that it is impossible to leave the switcharm open when the door is closed. Of course upon closing the door the circuit will be broken by the opening movement of the switch 14:.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. An alarm, comprising an electric circuit, a swinging switch-arm in the circuit, a contact-brush in the circuit and with which the arm normally engages, a sliding plate adapted to hold the switch-arm in its open position, and arranged to be moved to release the arm,

and a lug on said plate, with which the lug IO on the arm is designed to engage to hold the switch-arm in its open position, substantially as specified.

OSCAR II. SOllU CK.

\Vitnesses:

WM. KNIGHT SHRYOCK, LoUIs F, ScHUcK.

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