US1035510A - Alarm. - Google Patents

Description

G. YOCH.

ALARM.

APPLICATION FILED MABHZS, 1912.

Patented Aug. 13, 1912.

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PATENT OFFICE.

GEORGE YOGI-I, OF FREELAND, PENNSYLVANIA.

ALARM.

Specification of Letters Patent.

Application filed March 23, 1912.

Patented Aug. 13, 1912.

Serial No. 685,769.

To all whom it may concern Be it known that I, Gnonen Yocn, a citizen of the United States, residing at Freeland, in the county of Luzerne and State of Pennsylvania, have invented certain new and useful Improvements in Alarms, of which the following is a specification, reference being bad to the accompanying drawings.

This invention comprehends certain new and useful improvements in signals and relates particularly to a knob actuated alarm.

The invention has for its primary object a simple, durable and etlieient construction of audible signal which may be easily attached to the knob of a door whereby the occupant or occupants of the room into which the door leads may be instantly apprised of the fact when the knob is turned preparatory to opening the door.

The invention has for a further object an improved construction of knob actuated. alarm the parts of which may be easily and cheaply construct-ed and capable of being readily assembled and not liable to get out of order. a

A still further object of the invention is to provide a device of this type which includes a knob engaging element capable of fitting and being secured to knobs of clifferent sizes, so as to increase the range of usefulness of the device, the parts being so arranged that the device may be very quickly attached to a knob when required and very easily removed when not desired for use. And the invention also aims to generally improve this class of devices to render them more useful and commercially desirable.

With these and other objects in view as will more fully appear as the description proceeds, the invention consists in certain constructions, arrangements and combinations of the parts that I shall hereinafter fully describe and claim.

For a full understanding of the invention reference is to be had to the following description and accompanying drawings, in which Figure 1 is a side edge view of my improved alarm, showing its application to a door knob, the latter being indicated in dotted lines; Fig. 2 is a face view of the device, a part being broken away; Fig. 3 is a horizontal sectional View, the section being taken on a plane indicated by the line 3----3 of Fig. 1 Fig. 4: is a detail perspective view of the knob engaging elements of the device; and Fig. 5 is a fragmentary perspective view of the post which is designed for cngagen'ient thereby.

Correspmiding and like parts are referred to in the following (lQSUI'iPtiOIl and indicated in all the views of the accompanying drawings by like reference characters. Referring to the drawings, the numeral 1 designates the base plate of my improved knob actuated alarm, said base plate being provided within its upper end with an opening 2 in which a post 8 is journaled, said post being also journaled in a casing 4; which, in the present embodiment of the invention, is open at top and bottom and which is formed by a metallic strap with angular ends having taugs 5 clenched in perforations 6 formed in the base plate. Secured to the post 3 and mounted within the casing i is a master gear wheel 7 the teeth of which mesh with a spur pinion S secured to a shaft 9 journaled in the base plate below the post The pinion S is mounted in a casing 10 which corresponds in formation, but is preferably smaller than the casing l, hereinbefore mentioned.

The pinion 8 is formed on one face with diametrically disposed pins 11 which are received in a substantially triangular opeI1- ing 12 formed in the enlarged upper end of a link 13 which is also mounted in the casing 10, between the wall thereof and the outermost face of the pinion. At this point it will be understood that when the post 3 is turned the pinion 8 will be rotated in a direction to cause one of the pins 11 to engage with the wall of the opening 12 and thus raise the link 13.

The link 13 is pivotally connected at its lower end, as at 141 with a detent or pawl 15 which is pivoted on a stud 15 projecting from one face of the base plate 1 and which is formed with a hooked free end designed for engagement with a cog wheel 16 which is secured to a shaft 17 driven by a spring motor 18 secured to the opposite face of the base plate 1, as clearly illustrated in the drawings. The spring 19 of said motor may be easily wound by a key or handle 20, as shown. In addition to the cog wheel 16, the shaft 17 carries a freely pivoted and preferably joined striker 21 which is de signed to engage a gong 22 held on a post which is secured to the base plate 1. The

detent 15 is normally held in engagement with the cog wheel 16 by a contractile spring 23.

From as much of the description as has preceded, in connection with the accompanying drawings, it will be understood that when the post 3 is'turned as before mentioned and the pinion 8 also turned thereby, one of the pins 11 will cause the link to be raised upwardly so as to release the detent 15 from the cog wheel 16, thereby permitting the motor to act to sound the alarm by the repeated engagement of the striker 21 with the gong 22. As soon as the post is released or turned back to its initial inoperative position where the two pins 11 will lie against the upper wall of the opening 12, it is clear that the spring 23 will be permitted to act to cause the engagement of the pawl 15 with the cog wheel 16 and consequently the device will be held in an inoperative condition.

As stated in the outset of the specification, it is one of the objects of my invention to provide a device of this character which may be conveniently used as an attachment for use in connection with any ordinary knob for a door. To accomplish this result, the post 3, in the present embodiment of the invention is formed at opposite sides with notches 24 designed for engagement with flanges 25 that are formed on a clip 26 which is designed for engagement with a door knob, being provided for this purpose with laterally extending curved ears 27 designed to engage over the knob. Thus it will be understood that when the clip 26 is engaged with the post, any turning of the clip will cause the post to turn also. The clip 26 is provided at one end with a flexible strap 28 carrying a hook 29, whereby a rubber band 30 or other contractile band may be engaged around said hook and also around the hooks 31 that are formed on the pins 27 so as to detachably and yet securely hold the clip upon the knob.

It will thus be seen that the device may be easily secured to a door knob on the inside of a room, so that when the latch is opened from the outside and the knob is turned, the post 8 will be also turned and the alarm sounded, in the manner hereinbefore set forth.

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While the accompanying drawings illustrate what I believe to be the preferred embodiment of my invention, it is to be understood that the invention is not limited thereto but that various changes may be made in the construction, arrangement and proportions of the parts without departing from the scope of the invent-ion as defined in the appended claims.

Havin thus described the invention what is claimed is:

1. An alarm of the character described, including a base plate, a post journaled therein and adapted to be turned, a master gear wheel carried by said post, a pinion meshing with said gear wheel and formed on one face with pins, a link formed with an opening accommodating said pins, the

pins being adapted to engage the wall of said opening to move the link, a pawl pivotally supported upon the base plate and connected to said link, an audible signal including a gong and a striker therefor, a spring motor arranged to operate the striker, and a cog wheel movable with the striker and designed for engagement by said 2. An alarm of the character described, including a base plate, a post journaled therein, a master gear wheel carried by said post, a casing secured to one face of the base plate and in which the post is journaled and the gear wheel mounted, another casing se cured to the base plate below the first named casing, a pinion mounted in said second named casing and formed on one face with diametrically opposed pins, a link mounted in said second named casing and formed at one end with an opening receiving said pins, a pawl pivotally connected to the base plate and operatively connected to the lower end of said link, a gong carried by the base plate, a spring motor, a striker adapted for engagement with the gong and actuated by said motor, and acog wheel movable with said striker and designed for engagement by said pawl.

In testimony whereof I hereunto aflix my signature in the presence of two witnesses.

GEORGE YOCH. Witnesses:

DANIEL S. BUCKLEY, VICTOR A OswALn.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). C.

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