US438127A

US438127A - Burglar-alarm

Info

Publication number: US438127A
Authority: US
Publication date: 1890-10-07
Anticipated expiration: 1907-10-07

Description

(No Model.) 2 Sheets-Sheet 1. W. J. AGKBRMAN. BURGLAR ALARM.

Patented Oct. '7, 1890.

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(No Model.) 2 Sheets-Sheet 2. W. J. ACKERMAN. BURGLAR ALARM.

N0. 438,127. Patented Oct. '7, 1890.

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UNITED STATES PATENT ()EEIcE.

\VILLIAM J. ACKERMAN, OF GRAND RAPIDS, MICHIGAN.

B U RG LAR-ALARM SPECIFICATION forming part of Letters Patent No. 438,127, dated October 7, 1890.

Application filed October 22, 1889. Serial No. 327,825- (No model.) Patented in Canada November 16, 1889, No- 32851.

To all whom it may concern.-

Be it known that I, WILLIAM J. ACKERMAN, a citizen of the United States, residing at Grand Rapids, in the county of Kent and State of Michigan, have invented certain new and useful Improvements in Burglar-Alarms, (for which I have obtained Letters Patent from the Dominionof Oanada,numbered 32,851,and bearing date November 16, 1889,) of which the following is a specificaton.

My invention relates to improvements in electric burglar-alarms; and its objects are, first, to provide a burglar-alarm with which a window-sash cannot be raised without sounding an alarm; second, to provide a burglaralarm with which a window-glass cannot be out, broken, or removed without sounding an alarm; third, to provide aburglar-alarm with which a slight pressure upon the outside of a sash or glass will sound an alarm, and, fourth, to provide a burglar-alarm with which a sash-lock cannot be drawn or loosened with out sounding an alarm. I accomplish these results by the mechanism illustrated in the accompanying drawings, in which Figure l is asection of a sash-stile and a window-jamb cut away to show the relative position of the several parts of my appliance. Fig. 2 is a cross-section of the same on the line a; 00 of Fig. 1. Fig. 3 shows the face of a window-jamb and the edge of a sashstile with my appliance attached and connected with an electric battery and an alarm-bell. Fig. at shows the presser-bar operated by a coiled spring. Fig. 5 is a section of a door stile and jamb, showing how the plates that are connected with the electric bell and battery and the spring M may be applied to a door-lock; and Fig. 6 shows the face of a doorj amb with the lock-plate removed to show the relative position of these several parts.

Similar letters refer to similar parts throughout the several views.

A is a presser-bar.

B is the base that supports the presser-bar and connections.

0 is a metallic standard for the support of the presser ba-r.

O is a metallic plate arranged to act with the presser-bar in completing or breaking the electric circuit.

D and D are metallic plates secured to the edge of the sash-stile for the purpose of completing the electric circuit through the plates E and E on the face of the window-jamb.

E is a metallic plate attached to the window-jamb for the purpose of completing the circuit of electricity through the plates D D and E E by raising the sash.

F is a section of a window-jamb.

G is a section of a sash-stile.

II and H are insulated wires for completing the electric circuit.

I is a spring for holding the back end of the presser-bar up, so as to force the outer end a upon the surface of the glass.

J is a standard or support for the presserbar.

K is a pivot, by means of which the presserbar is secured to and turns upon the standard J L is a sash-lock.

M is a metallic spring inserted in the window-jamb to connect with the plates E and E to complete the electric circuit when the sashlock is drawn.

0 is a window glassfl is a spring, and Q is astop.

R is a mortise through the sash-stile for the reception of my presser-bar support.

S is an electric battery, and T is an alarmbell.

In constructing my improved burglar-alarm I attach my presser-bar A to a base B, of some firm non-conductor of electricity, by passing a screw or bolt K through the presser-bar and into a standard J in such a manner that it will act as a pivot, upon which the presser-bar will turn in throwing the outer end a to or from the glass, and the standard J is pivoted into the upper and lower flanges of the plate 0 in such a manner that the outer end of the presser-bar may be thrown up over the surface of the glass to the position indicated by the dotted lines A, and secured to the edge of the sash-stile by means of the sliding catch 1), or may be extended out over the surface of the glassto the position shown at A.

The plate 0 is secured to the base B by means of screws or other suitable device, and is made substantially in the form shown.

I attach a metallic plate 0 to the base Bin such aposition that it is disconnected from the plate 0, and that the back end of the presser-bar Will come-between two metallic surfaces, as shown in Fig.2, in such a manner that a slight movement of the outer end of the presser-bar to or from the glass will bring one side or the other of the back end in contact with the surface of this plate.

I attach a spring I to the base Bin such a position that its free end will bear upon the back side of the end of the presser-bar when extended, and hold the bar firmly in place, and for the purpose of adjustingthe position of the prsser-bar andof regulating its action upon the plate 0, I place an adjustable screw d through the outer end of the bar, arranged to rest upon the surface of the-glass, as shown in Fig. 2.

The spring I may be aflat spring, as shown in Fig. 1, and act upon the presser-bar in one direction only, or it may be a coil-spring, as shown in Fig. 4, in which case it may be made to throw the presser-bar both out, over, and firmly upon the surface of the glass, the latter motion being attained by so arranging the spring that the outer end of the coil will incline outward, so as to press upon the back side of the back end of the presser-bar and throw the outer end at d upon the glass at the same time that the spring of the coil throws it around over the glass.

For the purpose of securing the presser-bar in position at the edge of the sash-stile, as indicated by the dotted lines A, I place acatch b upon the style in such a position that it may be thrown over the end of the presserbar, and when the flat spring I, Fig. 1, is used I place a spring b in the stile to throw the presser-bar out to position over the glass.

To attach the presser-bar and connections to a window-sash, I beat a mortise B through the sash-stile and insert the base 13 until the plate, 0 comes flush with the ogee of the stile, the base 13 and the plates 0 and O fitting the mortise sufiiciently close to hold the whole firmly in place. -I then secure two metallic plates D and D to the back edge of the sash .stile, one of which is connected with the presser-bar through the insulated wire H, which is electrically attached at one end to the plate D and at the opposite end to the plate 0, the plate 0, the standard J, and the pivot K, and the other with the plate 0, through the insulated Wire H, which is connected at one end with the plate D and at the other end with the plate 0', and the two metallic plates E and E to the face of the window-jamb directly opposite to and connected, respectively, with the lower ends of the plates D and D and are also connected respectively with the positive and negative poles of an electric battery, and with alarmbells through the insulated Wires II H, connected, respectively, with these plates and with an electric battery and alarm-bell in the usual manner.

For the purpose of providing against the raising of the window-sash, I attach a metallic plate E to the face of the window-jamb directly above the plates E and E ata proper distance so that it will not touch. The upper end of the plate stands just above the upper ends of the plates D D on the sash-stile. The body of this plate is inserted into the window-jamb far enough so that it cannot come in contact with the plates on the stile; but the upper end is sprung out and left free to press upon the edge of the stile, so that if the sash is raised it will come in contact with the plates on the edge of the stile and complete the circuit of electricity through the several plates and an alarm will be sounded.

It sometimes happens that a sash is loose enough in the frame so that it may be thrown to one side far enough so that the plates D and D would be entirely disconnected from the plates E, E, and E and render it possible to raise the sash or press upon the glass without sounding an alarm. I guard against this, first, by making the plates on the jamb so that they will spring out toward the sashstile a short distance; second, by means of inserting a metallic plate or spring into the window-jamb, one end being rigidly secured and the other end left free to spring out and bear upon the plates that are connected with the electric battery and alarm-bells. This spring I place in a position so that when the sash-lock bears upon or enters the jamb it will press upon it and force the free end away from the plates and break the electric current; but when the sash-lock is drawn for raising the window it will spring out against the plates, as shown in Fig. 3. n

This appliance may be attached with good effect to a door-lock by securing it back of the lock-plate in position so that the lockbolt will act upon it as the sask-lock acts in a window. The connecting of the plates that are connected with the electric battery and bells through this spring by the action of the lock-bolt will complete the electric current and sound an alarm. WVhen used in this connection, I find it necessary to insert a nonconducting substance m between the plates E E and the lock-plate to disconnect these plates and prevent an electrical circuit independent of the spring.

I provide for averting the possibility of pressing open the sash or glass for removing the glass when the presser bar is not extended over the glass by placing the plates E and E in such a position that a slight lateral movement of the sash will bring oneof the plates upon the sash-stile to bear upon both of the plates on the jamb and complete the circuit; and to avert the danger of a lateral movement of the sash when not desired I place a spring P between the edge of the sash and the window-stop in such a position that it will hold the sash against the outer stop and the edges of the plates D and E apart. I do not confine myself to this particular form of connectingbylateral motion, but prefer this form. My appliance may be placed upon both sides of the sash by duplicating the Presser-bars and their connections and connecting them with those already described in the usual manner.

As the connecting of electric batteries and alarm-bells beyond the points described as my invention is old and thoroughly understood by electrical experts, I wil not attempt to describe it further; but,

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is

1. The combination, in a burglar-alarm, of a metallic presser-bar pivoted to a standard in which it will have a Vertical and a lateral motion, supported on a non-conducting base, a conducting-plate so arranged that the back end of the presser-bar stands suspended between two metallic surfaces, a spring for holding the presser-bar in position, metallic plates on the edge of the sash-stile, connected with the metallic plates C and O and bearing upon plates E l on the face of the window-jamb, and plates E E in the window-jambs connected with the positive and negative poles of an electric battery and with alarm-bells, substantially as and for the purpose set forth.

2. The combination, in a burglar-alarm, of a presscr-bar pivoted to a standard in such a manner that it may be given a vertical or a lateral motion, a conducting-plate O for the support of the standard, a conducting-plate 0, arranged so that the back end of the presser-bar will stand suspended between these two metallic surfaces, a spring for holding the presser-bar in position, an adjustingscrew, a catch to hold the presser-bar against the face of the sash-stile, a non-conducting base for the support of the presser-bar and the conducting plates and spring, metallic plates secured to the edge of the sash-stile and connected with the metallic plates 0 and G, a plate attached to the window-jamb at the upper end of the plates on the sash-stile, and plates attached to the window-jamb at the lower end of and in contact with the plates on the sash-stile, connected by wires with an electric battery and alarm-bells, substantially as and for the purpose set forth.

The combination, in a burglar-alarm, of a presser-bar pivoted to a standard which is supported upon a non conducting base, a spring for holding the presser-bar in position, a metallic plate for completing the electric circuit through the presser-bar, metallic plates on the edge of the sash-stile having a metallic connection with plates C and O and with plates on the face of the window-jamb, and metallic plates on the jamb connected with the positive and negative poles of an electric battery and with alarm-bells, with a metallic spring inserted into the window-jamb back of the sash-lock, the upper end of which will be brought in contact with the metallic plates that are connected with an electric battery and alarm-bells when the lock-bolt is drawn, substantiallyas and for the purpose set forth.

electric battery and bells, with plates attached to the edge of the sash-stile considerably longer than the plates on the jamb, and a plate on the jamb back of the upper end of the plates on the stile, said plates being formed to complete an electric circuit with the others,

substantially as and for the purpose set forth.

6. The combination, in a burglar-alarm, of metallic plates secured to the jamb and connected with an electric battery and alarmbells, and metallic plates secured to the edge of the saslrstile and connected with a metallic plate and a presser-bar, with a metallic presser-bar pivoted to a standard that is secured to the sash-stile, a spring for holding the presser-bar in position, a connectingplate at the back end of the presser-bar so situated that the end of the bar will be suspended between two metallic surfaces, the presser-bar and the plate being connected with the plates D and D, respectively, by electric conductors, and an adjusting device for the presser-bar, substantially as and for the purpose set forth.

7. The combination, in a burglar-alarm, of metallic plates secured to the window-jamb and connected with an electric battery and bells, and metallic plates secured to the sashstile, with a spring between the sash-stile and stop, substantially as and for the purpose set forth.

8. The combination, in a burglar-alarm, of metallic plates secured to the window-jamb and connected with an electric battery and alarm-bells, plates secured to the edge of the sash-stile, and a connecting-plate secured to the jamb above the upper end of the plates on the stile, with a spring between the sashstile and stop, substantially as and for the purpose set forth.

9. The combination, in a burglar-alarm, of plates on the jamb connected with an electric battery and bells, plates on the sash-stile connected with the plates on the jamb and with a presser-bar, a presser-bar connected with plates upon the sash-stile, supported in the sash-stile upon a non-conducting base and pivoted to a conducting-standard, and a connecting-plate, with aspring between the sashstile and stop, substantially as and for the purpose set forth.

10. The combination, in a burglar-alarm, of metallic plates secured to the window-jamb and connected with an electric battery and alarm-bells with plates on the sash-stile, a connecting-plate on the jamb at the upper ends of the plates on the stile, a spring back of the sash-lock to connect with the plates that connect with the battery, a presser-bar secured upon the sash-stile, conducting-plates connected with the presser-bar and with the plates on the sash-stile, and a spring between the sash-stile and the jamb, substantially as and for the purpose set forth.

11. The combination,in a burglar-alarm, of plates on the jamb connected with an electric battery and bells and plates on the edge of the sash-stile, with a spring in thejamb atthe lower end of the plates that are connected with the battery to be acted upon by the lock bolt, and a spring between the sash'stile and the stop, substantially as and for the purpose set forth.

WVILLIAM J. ACKERM AN.

In presence of- ITHIEL J. CILLEY, D. A. MORRILL.