US1211732A - Combined door-bell and burglar-alarm. - Google Patents

Description

E. J. LUTWYGHE.

COMBINED DOOR BELL AND BURGLAR ALARM.

APPLICATION FILED JUNE 6,1914.

Patented Jan. 9, 1911'.

2 SHEETS-SHEET l.

E. J. LUTWYCHE.

COMBINED DOOR BELL AND BURGLAR ALARM.

APPLlCATlON FILED JUNE 6.19M.

Patented Jan. 9, 1917.

2 SHEETS-SHEET 2.

1720921 07" 5&5 Ali/72056 EDGAR J.

LUTWYCHE, OF CHICAGO,

ILLINOIS.

COMBINED DOOR-BELL AND BUEGLAR-ALARM.

Specification of Letters Patent.

Patented Jan. a, rare.

Application filed June .6, 1914. Serial No. 843,426.

one desiring admission.

In the drawings, wherein like reference characters indicate like or corresponding parts, Figure 1 represents the inner face of the door, and the associated casing, with my improved device attached thereto; Fig. 2 is a sectional view on the line 22 of Fig. 1 showing my improved device in position in the manner in which it is operated as a door-bell; Fig. 3 is a similar view on the line 3-3 of Fig. 1, showing the manner in which the device will be operated as an alarm;

Fig. 4: is a bottom plan view of the bell mechanism; Fig. 5 is a top plan view of the same with the bell removed; Fig. 6 is a perspective view of the means of connecting the check chain to the door casing.

In the drawings, 1 represents the door provided with my improved device, in which 2 represents the door casing. A spring-actuated bell 3 is attached to the door, 006perating with a push pin 5 on the opposite face of the door, and extendingtherethrough to engage and operate the bell. The bell is also provided with a bar 6, to which is connected a chain 7, which engages any suitable cooperating member 8, attached to the door casing. The bar 6 is so constructed that upon drawing the chain it will actuate the bell. Thus as the door is closed, as shown in Figs. 1 and 3, any effort to open the door will result in a pull on the bar 6, when the bell will be actuated and the alarm given. When the door is closed, and any person desires admission, the push pin may be employed to operate the bell, which will serve to ive notice, and the attendant may then release the chain and open the door. Thus the device serves a double purpose.

Any preferred form of spring-actuated bell may be employed, that shown being preferred. In this form the winding post 9 may be operated by means of the bell 3,

screwed thereon in the usual manner. The ratchet 10 on the shaft 9 and the pawl 11 pivoted on the back of a plate ll (partly broken away as shown by dotted lines in Fig. 5) hold the winding post in its wound position. Upon the opposite end of the winding post is attached the end of a coiled spring 12, the other end of the coiled spring being attached to a spider 13, carried on a sleeve 14 mounted on the winding post. The upper end of the sleeve is provided with the usual gear wheel 15, which, by means of the train 16 and 17, drives the spur wheel 18,

forming one member of the escapement, of which the yoke 19 is the other member, carrying a clapper 20 on the wire or rod 21.

Figs. 4c and 5 show a notched pin 22, resiliently held at its outer limit by a spring 23, an ofiset portion 24- thereof engaging the wire or bar 21 on the clapper, holding it in its outer position and preventing the operation of the escapement. Any means serving to press the bar 22 inwardly in a longitudinal direction serves to release the wire or bar 21 of the clapper when the escapement is actuated by the spring, and the clapper will strike a succession of rapid blows upon the bell 3 in proximity thereto. As shown in the drawing, a lever 25 pivoted at 26 has one end extended to contact with the head of the pin 22, while the outer end of the lever has attached thereto the bar 6, before alluded to, which carries the chain 7. It will thus be seen that any pull on the chain serves to force the pin inward and releases the escapement.

As shown in Fig. 2, the lever 25 is provided with an inclined edge, against which the inner end of the push pin 26 impinges in such manner that as the push pin is pressed inward, it will also serve to press the lever, together with the pin 22, inward, thus causing the bell to operate as before described. Any other simple construction of the spring-actuated bell may be employed, the idea being to so attach the chain, or equivalent member, and connect the push pin with the same bell that it serves both purposes, first as a proper means of notification when anyone desires to properly gain admission, and second of sounding an alarm when anyone improperly attempts to gain admission.

In Fig. 6, I have shown my preferred means for engagement with the free end of the chain. As here shown, a circular plate 27 is provided with a depending flange 28, and has formed therein a slot 29, provided with an enlarged opening 30. The end of the chain connection 31 readily passes within the enlarged opening 30, and upon being moved to the left (Fig. 1) drops down to the extreme end of the slot 29, gravity aiding in this connection. I prefer to extend the slot on the other side of the enlarged opening, as at 32, so that when an eifort is made by unauthorized persons to move the chain about the slot With the expectation of registering the member 81 with the enlarged open portion of the slot, the weight of the chain 7 combined with the Weight of the connecting device itself, will cause the latter to fall by gravity into the restricted extended portion 32 of the slot and prevent escape of the connection 31 from the plate 27, as will be obvious. Of course, from the inside of the door with a full view of the plate, the connection may be readily registered with the enlarged opening in the slot, and the connection removed by authorized persons in the expected proper use of the device.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is 1. In a device of the character described, an alarm adapted to be mounted on a door, a casing, means for actuating the alarm comprising an escapement mechanism, a stop device resiliently fastened to the casing and having an oif-set part engaging the escapement for holding the same inactive, a pivoted rocking lever engaging said stop device, a plurality of distinct releasing devices en gaging said lever, one of said releasing devices comprising a movable plunger coacting with an outwardly projecting'inclined part carried at one end of the lever, and the other of said releasing devices comprising a flexible member and a bar projecting to the exterior of the casing fastened at one end to said flexible member and fastened at its other end to the rocking lever, the other end of said flexible member being adapted to be fastened to the frame of the door to limit the extent of the opening of the door.

2.-In a device of the character described, an alarm adapted to be mounted upon a door, means for actuating the'alarm comprising an escapement mechanism and a rocking lever, a single stop device for holding the escapement inactive, a plurality of distinct releasing mechanisms for said stop device, one of said releasing mechanisms comprising a movable plunger, passing through the door and an oifset projecting part on the side of the lever extending at an angle thereto and adapted to be engaged by said plunger, the said ofiset projecting part of the lever being inclined relative to the body of the lever, and the other releasing device comprising a fiexiblemember secured at one end to the rocking lever and at its opposite end to the door frame to limit the extent of the opening of the door.

In testimony whereof, I have hereunto signed my name in the presence of two subscribing witnesses.

EDGAR J. LUTWYCHE.

Witnesses:

JOHN W. HILL, CHARLES I. COBB.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents Washington, D. G.

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