US508954A - Fire and burglar alarm - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1.

R. L. LEVIN.

FIRE AND BURGLAR ALARM.

No. 508,954. Patented Nov. 21, 1893.

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(No Model.) 2 sheet's sheet 2,

R. L. LEVIN. FIRE AND BURGLAR ALARM.

Patented Nov. 21,1893.

UNITED STAT s PATENT OFFICE.

: RUDOLPH L. LEVIN; OF MENOMINEE, MICHIGAN.

FIRE AND BURGLAR ALARM.

SPECIFICATION forming part of Letters Patent No. 508,954, dated November 21, 1893.

Application filed April '7, 1893. fierial NOJLBQAOL (No modell) To all whom, it may concern.-

Be it known that I, RUDOLPH L. LEVIN, a citizen of the United States, residing at Menominee, in the county of Menominee and State of Michigan, have invented a new and useful Fire and Burglar Alarm, of which the following is a specification.

My invention relates to improvements in fire and burglar alarms, and it has for its object to provide a simple and effective device, capable of general application, which sounds the alarm upon the severance of the cord or wire which is arranged at points accessible to fire and burglars.

Further, objects and advantages of my invention will appear in the following description, and the novel features thereof will be particularly pointed out in the claims.

In the drawings: Figure 1 is a view of the improvedalarm mechanism arranged in the operativeposition in a building. Fig. 2'is a perspective view of the alarm device. Fig. 3 is a'similar view of the device as seen after the alarm'has been sprung. Fig. 4. is a transverse section upon line m-ac of Fig. 3.

Similarnumerals designate corresponding parts in all the figures.

1 designates a cord or a fine wire, readily melted and severed upon the application of heat, which is arranged throughout the building, as shown in Fig. 1, adjacent to the windows and doors, and at such places as are most likely to be reached by fire, the angles being formed by carrying saidcordor wire aroundpulleys 2. This cord or wire consists of a main-line 3 and any desired number of branch-lines 4.

The doors andwindows are provided with any desired means for severing the cord or wire upon the opening thereof, as small knive or other sharp instruments, 5. 6 represents a clock-alarm mechanism, having a knocker-7 connected to the rock-shaft 9 anda trip arm 8 carried by the sameshaft, and 10 represents a spring retaining arm, whichextends over said trip-arm and is adapted, when depressed, to engage or bear upon the trip arm to hold it from vibration.

The base 11 is provided with guide- pulleys 12 and 13 arranged beneath the free end of the retaining-arm,'and the latter carries a similar pulley 14, and the line wire or cord passes over or around said pulleys and is connected at its terminal to the weight 15. This weight is sufficient, when suspended freely, to hold the retaining-arm in contact with the trip-arm and lockthe latter against vibration.

.The weight 15 is also connected, by a short cord 16 to a post 17 upon the base, to check the descent of the weight when the line-wire or cord is severed. v

18 represents the alarm bellL This being the construction of the improved alarm. mechanism, the operation thereof is as follows: The parts being arranged as described, and as shown in Fig. 1 and in Fig. 2, with the weight suspended by the line wire or cord which passes over said guide- pulleys 12, 13 and 14., whereby the retaining-arm 1s held in contact with the trip-arm 8, the linewire or cord is cut or severed by the opening of a door or window or by fire in any part of the building. At once the line-wire or\cord is caused to" slacken at the alarm, thereby dropping the weight, allowing the retainingarm to spring outward, releasing the trip-arm,

and enabling the spring 19 to actuate the knocker and sound the alarm.

From the above it will be seen that the construction and operation of the device are simple and direct and therefore certain.

Changes in. the form,proportion and minor details of construction may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

Having thus described my invention, what I claim, and desire to secure by Letters Patentis- 1: In a device of the class described, the combination with a line wire or cord, of a spring-actuated alarm mechanism provided with a trip lover, a retaining arm, and means for retracting the same to disengage the trip lever'when the arm is released, connections betweenthe'line wire or cord and said rctaining arm, and a weight attached-to the terminal of the line wire or cord to hold the latter under tension and the retaining arm inoperative relation with the trip arm, substantially as specified.

2. In a deviceof the class described, the

combination with a line-wire, and analar'mmechanism provided with'a trip-arm, of a retaining-arm provided with a spring to normally hold it out, of engagement with the triparm, guide pulleys 12,13 and 14, one of which is mounted upon said retaining-arm, and a weight connected to said line-wire or cord, substantially as specified.

3. In a device of the class described, the combination with a line-wire or cord, and an alarm-mechanism provided with a trip-arm, of a spring-actuated retaining-arm 10, carrying a pulley 14, stationary pulleys l2 and 13 around which and said pulley 14 the line-wire or cord passes, a weight connected to the linewire or cord, and a check cord connected to the weight to limit its descent, substantially as specified. I

In testimonythat I claim the foregoing as my own I have hereto aflixed my signature in the presence of two witnesses.

. RUDOLPH L. LEVIN. Witnesses:

FRANK BRAcELIN, J. G. JOHNSON.

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