US806532A

US806532A - Burglar-alarm.

Info

Publication number: US806532A
Application number: US25997405A
Authority: US
Inventors: Henry Frei
Original assignee: Individual
Current assignee: Individual
Priority date: 1905-05-11
Filing date: 1905-05-11
Publication date: 1905-12-05
Anticipated expiration: 1922-12-05

Description

No. 806,532.. Y PATENTED DEG.,5,1905..

H. PREI. BURGLAR ALARM.

7 APPLICATION FILED MAXI], 1905 UNITED STATES PATENT OFFICE.

HENRY FREI, OF ALLEGHENY, PENNSYLVANIA. BURGLA R- ALARM.

' To all whom it may concern.-

' Be it known that I, HENRY FREI, a citizen of Switzerland, residing at Allegheny, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Burglar-Alarms, of which the followingis a specification, reference being had therein to the accompanying drawings.

This invention relates to certain new and useful improvements in burglar-alarms, and relates more particularly to an alarm adapted to be used in connection with a door, transom, or hinged member.

The invention has for its primary object to provide a novel burglar-alarm in the form of an attachment that can be readily applied to door-frames, whereby it can be actuated by the opening of a door or transom. In this connection I have employed a conventional form of clockwork mechanism having an alarm attachment and have employed novel means in conjunction with the clockworkmechanism for actuating the alarm each time.

the door is opened, also means for releasing the alarm of the clockwork mechanism at night-time or at any time the mechanism may lie set to sound an alarm by the opening of a oor. I My improved alarm is constructed whereby it can be readily used as a door-bell to notify the occupants of a compartment that a door is opened, or the alarm maybe set to be actuated by the opening of a'door by unauthorpartly in section. Fig.4 is a top plan view of a toothed sector employed in connection with the burglar-alarm. Fig. 5, is a side elevation view of the same. F igsfl. 6 and 7 are detail views of clappers employed in con nection with the burglar-alarm.

To put my invention into practice, I" employ a conventional form of alarm-clockwork for operating my improved burglar-alarm.

Specification of Letters Patent.

Application filed May 11, 1905. Serial No. 259,974-

'nile class.

with the levers 21 and 26, the lever 21 is I Patented Dec. 5, 1905.

In the accompanying drawings I have illustrated a suitable casing 1, having a clockwork 2 mounted therein, which is adapted to be manually wound by the winding arbor 3. The clockwork which I employ carries a clapper 4, which is adapted to be operated by the clockwork at a predetermined time, which is set by mechanism common to ordinary alarmclocks;

Myinvention resides in mounting the clockwork in a suitable casing which is provided with a hinged door 5, whereby easy access may be had to the casing in order to windthe 'works. The top of the casing is provided with a standard 6, adapted to support a bell 7, and in constructing the standard 6 I make a portion of the same hollow to accommodate a pin 8. away, as indicated at 9, to permit of a toothed sector 10 being secured to the lower end of the pin 8: The standard 6 is provided with an outwardly-extending bracket 11 in which is journaled a vertically-disposed pinion-shaft 12, with which the toothed sector 10 engages. The pinion-shaft 12 carries a disk 14, to which are slidably connected clappers 1515. 7 These clappersare slotted, as indicated at 16 16, and are slidably connected near'the periphery of the disk 14 by suitable screws 17 17. The upper end ofthe pin 8 is provided with an outwardly-extending arm 18, and this arm is The one side of the standard 6 is" cut.

normally held in one position by a spring 19,

carried by the upper end of the standard 6.

Secured to the outer end of the arm 18 is a rod 20, which is adapted to engage a lever 21,'

pivotally mounted upon a door 22. This lever is provided with an enlarged head 23, having a groove 24 formed therein,'in which the end of the rod 20 is adapted to engage.

The door 22 is provided with a pin 25 to normally hold the lever 21 in a lateral positiori. The door 22 is also provided with a pivotally-mounted' auxiliary lever 26 and a pin 27. In operation the lever 26 is adapted to engage an outwardly-extending arm 28, carried by a pivotally-mounted bar 29, which is adapted to engage the clapper-rod 30 of the clapper 4.

The casing 1 of my improved burglar-alarm is adapted to be secured to the door-frame 31 of the door 2, preferably near the top thereof, whereby the alarm and its appurtenant parts cannot. be tampered with by the juve- When the door 22 is equipped adapted to operate the alarm every time the door is opened, the alarm in this instance serving functionally as a door-bell. When the door carrying the lever 21 is open, the end of the lever striking the rod causes the pin 8 to rotate through the medium of the arm 18, and as said pin is partially rotated the pinion-shaft 12 is rotated through the medium of the toothed sector 10, carried by the pin 8. When the pinion-shaft 12 rotates, the disk 14: is revolved, causing the clappers 15 15 to fly outwardly in engagement with the hell 7 and sound an alarm.

In order to sound a night-alarm, the lever 21 is disengaged from the pin 25 and permitted to hang in a vertical position, and the alarm-setting mechanism is then wound and the bar 29 placed in engagement with the clapper-rod to prevent the clapper 4 from engaging the bell until the desired time. To retain the bar 29 in engagement with the clapperrod 30, the lever 26 is swung upwardly into engagement with the pin 27 until its end engages the lever 28 and retains the bar 29 in engagement with the clapper-rod. When the door is swung open, the end of the bar 29 engaging the clapper-rod 30 is moved away from the clapper-rod and permits of the clock mechanism operating the clapper in order to sound the bell 7 and give an alarm indicating that the door 22 has been opened.

The clapper 4 and the

levers

26 and 29 are only employed to sound an alarm when the door 22 is opened of a night by an unauthorized person and the hell 7, lever 21, and rod 20 employed as a day-alarm or door-bell.

I do not care to confine myself to any special form of mechanism that I may use for actuating my improved alarm; nor do I care to limit the use of the alarm in connection with a door, as it can be readily used in connection with transoms or swinging or hinged members.

WVhat I claim, and desire to secure by Letters Patent, is-

1. In an alarm of the type described, the combination with a suitable spring-motor mechanism and a door, of a bell carried by said mechanism and adapted to be sounded by a clapper, a pin journaled in said bell, a revoluble disk mounted in said bell, atoothed sector carried by said pin and adapted to actuate said disk, clappers slidably mounted upon said disk and adapted to strike said bell, an outwardly-extending arm carried by the upper end of said pin, levers pivotally connected to said door, one of said levers being adapted to engage said arm to sound said bell, a bar carried by said mechanism and adapted to engage the clapper of said mechanism, the other of said pivotally-mounted levers being adapted to engage said bar, substantially as described.

2. In an alarm, the combination with a suitable spring-motor mechanism, a bell, a clapper actuated by said mechanism and a door, of revoluble clapper-s mounted within said bell, levers pivotally connected to said door, means actuated by one of said levers to revolve said clapper-s and sound said bell, and means actuated by the other of said levers to release the first-named clapper to sound said bell, substantially as described.

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

HENRY FREI.

WVitnesses:

H. O. EvER'r, E. E. POTTER.