US956288A - Burglar-alarm. - Google Patents

Description

'- UHRITGHFIELD.

BURGLAR ALARM.

APPLIOATIVON HLEDJULY 1. 1909.

Patented Apr. 26, 1910.

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emanan-Anania.

Specification of Letters 4Patenti. Application-filed July 1,

Patented apr. 2e, i910.

1909. Serial No. 505,360.

To all whom it may concern:

Be it known that I, SAMUEL GHRITCH- FIELD, a citizen of the United States, residing at National Military Home, in the county of Montgomery and State of Ohio, have invented certain new' and useful Improvements in Burglar-Alarms, of which the following is a specification.

This invention relates to certain new and useful improvements in burglar alarms.

The object of my invention is to provide an alarm mechanism, arranged to be secured to a door, window, drawer or the like to operate an audible alarm at the point where the alarm mechanism is located as well as being arranged to operate a second alarm at a point distant from the location of the primary alarm mechanism.

A further object of my invention is to provide a device arranged to be secured to a'moving member, such as a door, window, drawer or the like, so arranged that when said member' is moved, a cap will be discharged, while at the same time the device will close a normally openy electric circuit to operate a signal to give a second'alarni at a point remote from the location of the rst alarm.

With these and other objects in view, the present invention consists in the combination and arrangement of parts as will be hereinafter more fully described and particularly pointed out 1n the appended claims, it being understood that changes in the specific structure 4shown and described may be made within the scope of the claims without departing from the spirit of the invention.

In the drawin s forming a portion of this specification, an in lwhich like characters of reference indicate similar parts in the several views, Figure 1 shows a fragmentary portion of a window frame provided with my alarm, Fig. 2 shows a` detached horizontal sectional view through the .alarm vmechanism, Fig. 3 is a transverse sectional view through the operating mechanism, Fig. 4 is a front view of the housing disclosing the location of the several plunging members.

In carrying out the object of my 'invention, -I employ a suitable housing 10, comprislng two similar sides, a top'and two end plates. This housing is provided with the two securing flanges 9, 9 having suitable screw openings, tie end plate 5 being projected upward beyond the top plate 10 of.

the housing. The top plate 10 has a longitudinal slot, while one of the sidesof the housing as the one marked 1 is also provided with a slot as is shown at 4, the remaining side 1' being imperforate. The rear plate '6 is provided with a central opening 6', which -registers with a similar opening 2 -within the front plate 5 as shown. Slidably held within the openings G and 2, is the bolt 11, this bolt having its forward end reduced length the bolt is provided with the opening 20 square in outline and thepin opening 21. As shown the top 10 of the housing is fiat and heldin alinement with the top 10 is a" p square opening 4 within the front plate 5.

Slidably held to the top 10 is a plunger 14 rectangular in cross` section which is arranged to project through the opening. 4 as shown. This plunger 14 is provided with two openings marked 22 and 23 respectively, the .opening 22 being square in cross section through the slot within the plate top 10Jand the square stem 25 of the operating handle 26, this stem 25 extending t irough the bolt as shown.

Surrounding the bolt 11 and held between the stem 25 and the`rear plate 6, is the protractile spring 28.

tangular opening 4 as disclosed. In referring to the drawings it will be noted that the plunger 14 extends a considerable dis tance beyond the end 11 of the bolt.

- Held within the pin opening 21 within the bolt, is the lsecuring end 30 ofl an approxi- .'s held approximately in alinement with the end of the plunger 14. The portion 33 of this contact maker extends through the opening 3 within thefront plate 5 of the housing and is slidably guided therein.

The housing as described is securedto a dow frame B at afpoint above the location of the housing, is the rub. plate 35 having the securing ,flange 36 through which the screws 37 arecarried in securing this rub plate. This plate is preferably countersunk within the side stile of the window frame B. As shown in the drawings, this rub provided with the square opening 3 '-ofa extending through lthe bolt opening 20, is-

as shown at l11 while approximately midand held within this opening 22 and passing '.The plunger 14 is guided within the recmately L-shaped resilient member 31 form-v/" ing a contact ar1n,.the upper end 32 of whichv suitable part of the window sash A as shown, y in Fie; 1 for instance,.an,d fixed to the win' plate is size to receive .the projecting end of the plunger 14, and held adjacent to this openmg 37 is the lug 38 having a central bore Within which is held a cartridge 39, a vent opening 40 lleading from the cartridge-receiving opening to permit the escape of the gases when the cartridge 39 is exploded. Located above the rub plate at a suitable point, is an ordinary p ush button 43 carried within the frame 42, from which push button extend the two electric conductors 44 and 45 which are led to a suitable electric bell 47.

The circuit formed by means of the conductors 44 and 45 is provided with a suitable battery 4G.

The bell 47 is located at any suitable point where it is desired that the alarm should be given in case the window or other member to which the alarm operating mechanism is secured is actuated. f

lVhen it is desired yto set the alarm mechamsm, the stop pin 50 which is normally held within the openingl Q3 within the lunger lLl is removed. This pin is locate and held to the rear of the upper portion o'l' the front plate 5, so as to hold the mechanism in an inoperative position. On the removal of this pin 50, the plunger as well as the connected bolt is forced forward so that the end of the plunger ll contacts with the side stile or" the window frame. Now the instrumentalities are so arranged that the opening 3T within the rub plate is in the path of the forward end ot the plunger 14,

so that when the window is raised the phmger end finally plunges through this opening 3T being propelled by means oit the spring 2S, in which operation the end of the j bolt contacts with the cap or blank cartridge 3f) within the lug` 3S and explodes the i lsame. t the. same time vthat the Jforward end of the bolt came in contact with the cartridge Si) the upper end 252 of the yielding contact arm is forcibly carried against the push button 423 and held in contact thereg with to close the normally open circuit and 1 rl`he bell 4T thus ring the electric bell ll". will be rung` as long as the arm is in contact with the push botton. The window then is held in a locked position by means ot the plunger 14.

From the foregoing it will be noted that l provide the window or other member with an auxiliary lock or bolt-mechanism arranged to actuate an explosive. as well as an electric alarm.

Having thus described my said invention,

-said bolt, a resilient member carried by said bolt, a normally open electric circuit arranged to be closed by said resilient member in one of its positions, and a cartridge holder secured to said frame in'the path of said bolt, an opening being located in said frame, adjacent to said cartridge holder in the path of said plunger.

2. The combination with a movable hous` ing, of a spring bolt held within said housing and projecting beyond one end thereof, a plunger slidably held to said housing, an operating stem connecting said plunger to said bolt, a resilient member carried by said bolt, a terminal of a normally open electric circuit in the path of said resilient member, a rub plate provided with a plunger opening in the path of said plunger and a cartridge holding lug placed proximal to said plunger opening and in the' path ot said bolt, as and forthe .purpose set forth.

3. In a device of the character described, the combination of thefollowing instrumentalities, to wit: a movable-housing, a bolt slidably held within said housingand projccting` beyond one end thereof, a protractile spring surrounding 'df bolt to normally force said bolt i'n onetlirljri ion, said housing having a top and au sii/de ,shin-a plunger slidably held'to the side 'of said housing, an operating lpin carried by said plunger and passing through said side slot, and secured to said bolt and serving as a stop to said spring, a' resilient member carried by said bolt aifideitending through said top slot, a rub pla'te ,having a plunger opening in the path ot' the plunger, a cartridge receiving lug in the path ot' said bolt, and a contact maker ot ,a normally open electric circuit in the path ot' said resilient member, all arranged substantially as and for the purpose set forth.

lu testimony whereof I atlix my signature, in presence of two witnesses.

h's SAMUEL l (,l lltl'lCllFlELD.

mark lVitnesscs ot mark:

lc'rnu iSanazlN, Ciinis'rornnn C. CLOUD.

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