US1350188A - Automatic burglar-alarm - Google Patents

Description

F. A. TERRY.

AUTOMATIC BURGLAR ALARM.

APPLICATION FILED .IULY 9.1917.

Patented M13: 17, 1920* 3 SHEETS-SHEET l.

INVENTOR fMIVIfL/A' fl 72-85);

A TTORNEYS F. A. TERRY.

AUTOMATIC BURGLAR ALARM. I

APPLICATION FILED JULY 9.1917.

Patented Aug. 17, 1920.

3 $HEETSSHEET 2.

mmvron win/88 s ATTORNEYS F. A. TERRY; AUTOMATIC BURGLAR ALARM.

APPLICATION FILED JULY 9.1917.

Patented Aug. 17,1920.

3 SHEETS-SHEET 3.

A TTORWEYS FRANKLIN ADELBERT TERRY, OF SAN FRANCISCO, CALIFORNIA.

AUTOMATIC BURGLAR-AI-IARM.

Specification of Letters Patent.

Application filed July 9, 1917. Serial No. 179,378.

To all whom it may concern:

Be it known that I, FRANKLIN ADELBERT. TERRY a citizen of the United States, and a resident of San Francisco, in the county of SanFrancisco and State of California, have invented an Improvement in Automatic Burglar-Alarms, of which the followin is a specification.

y invention relatesto improvements n automatic burglar alarms, and it consists 1n the constructions, combinations and arrangements herein described and claimed.

An object of my invention is to provide a burglar alarm which will send in a call for help over a telephone whenever the device is put, into operation. stance, I have shown manual means for starting the device which thereupon operates automatically, but it is obvious that push buttons might be arranged to start the device upon the opening of a window or a door,without departing from the splrit of the invention.

My invention is illustrated in the accompanying drawings, forming part of this application, in which Figure 1 is a side View of the device connected up with a telephone.

Fig. 2 is a plan view, certain parts being removed for the sake of clearness.

Fig. 3 is an enlarged section on the line 3-3 of Fig. 2.

Fig. 4 is a perspective view of a spring suspending means.

Fig. 5 is a perspective view showing the arrangement of levers for controlling the device.

Fig. 6 is a diagrammatic view of the electric circuit.

In carrying out .my invention, I may make use of a phonograph of any approved type, such as a cylinder phonograph. In the drawings the base of the phonograph is shown at 1, cylinder at 2, the travellng arm at 3, and the sound reproducing mechanism carried thereby at 4:. The cylinder is preferably provided with recorded calls which are repeatedat intervals, these calls being such as Send the police to 126 McAllister street, or similar calls.

Normally, that is to say when the instrument is set, the diaphragm of the reproducing mechanism rests with its edge on a spring support 5 like that shown'in Fig. 4, this spring support being secured to the easing of the device. The purpose of this support is to raise the needle from the wax cyl- In the present ininder, since the latter, in warm weather, is apt to permit the needle to sink in to such a distance that it is difiicult to start the machine.

In connection with the phonograph I make use of a motor M whose shaft is prov1ded with an L-shaped arni 6. This arm is arranged to engage a lever 7 which is pivoted at 8 and whose end is bent as shown at 9 to engagea brake lever 10.

Aswill'be seen from the drawings, and especially Fig. 5, I provide a lever 11 which is plvoted at 12 and whose opposite end is bent 1].1t0 U-shaped form, as shown at 13. The portion 13 is provided with a slot 14 through which the brake lever extends. The end of the portion 13 is curved upwardly and rearwardly, as shown at 15, so as to permit the hook 9 on the end ofthe lever 7 to ride over the upper end of the brake lever to en age the latter, in the manner hereinafter described.

Secured to the lever 1 is an L-shaped arm 16 having a slot 17 arranged to straddle the screw shaft 18, see Fig. 2,- which forms the driving means for the movable arm13.

Associated with the phonograph is a telephone set, this set being preferably a desk set. In order to conveniently mount the same I provide a stand or taboret 20 to which the desk set is firmly clamped. At 21 is a bracket bearing a bell crank lever 22, one end of this bell crank lever being attached, by means of a link or other suitable connection 23, to the switch hook 24 of the telephone set. The other arm of the lever is attached to the U-shaped portion 13 of the lever 11. i

From the foregoing description of the various parts of the device the operation thereof may be readily understood. The motor M is connected with the battery B, and the push buttons P or P ma be used to close the motor circuit when t e switch S is in the position shown in Fig. 6. This circuit may be closed in any suitable way, such as by operating it manually, that is to say pressing the push button with the hand, or closing it by the opening of a window or in any other suitable manner.

Patented Aug. 17,1920.

In setting the device the phonograph is wound up and the brake lever 10 is moved in position to prevent the operation of the phonograph, the lever 7 being brought over the end of the brake lever 10 to hold the latter, as shown in Fig. 1. The movement of the lever 10 will cause the switch hook 24 to be pulled downwardly where it will be held against the tension of the switch hookspring, precisely as if the receiver were hanging on the hook. The diaphragm of the reproducer is resting on the spring support 5.

Now if the circuit is closed by pressin the push buttons the motor M will turn an the arm 6 will engage the lever 7, raising the end 9 oil from the brake lever 10 whereupon the latter will be released and the machine started. At the same time the switch hook 24 will move to its upper position so as to complete the talking circuit of the telephone. The movement of machine moves the arm 3 away from the support 5 and brings the needle of the reproducer into engagement with the cylinder bearing the recorded calls. These are now sent in through the medium of the tube 28, and the sound amplifier 29, the latter being supported by means of a bracket or post 30 in front of the transmitter T of the telephone.

The device will continue to repeat the calls until the hub 3* of the arm 3 engages the arm 16, whereupon the lever 11 will be moved to the position shown in Fig. 1, the hook 9 will be brought into engagement with the upper end of the lever 10, so as to retain it in position, and the switch hook of the telephone will be again drawn downwardly.

I? claim:

1. /A burglar alarm comprising a telephone set, a phonograph disposed near the set, a brake for normally holding the phonograph mechanism stationary against spring tension, means connecting the switch hook of the telephone set with the brake mechanism for holding the switch hook in normal position, a motor, an electric circuit for opcrating the motor containing circuit closing devices, a locking lever for holding the said brake lever in position to prevent the operation of the phonograph, connections between said motor and said locking lever for releasing the latter and thereby permitting the operation of the phonograph, and the releasing of the switch hook to bring it into position to complete the talking circuit, and means for automatically resetting the brake and the switch hook, when the alarm has been sent in.

. 2. A burglar alarm comprising a telephone set, a phonograph disposed near the set, a brake for normally holding the phonograph mechanism stationary against spring tension, means connecting the switch hook of the telephone set with the brake mechanism for holding the switch hook in normal position, a motor, an electric circuit for operating the motor containing circuit closing devices, means for holding the phonograph needle normally out of engagement withthe record, means actuated by the motor for releasing the brake mechanism and the A burglar alarm comprising a telephone .set, a honograph' disposed near the set, a

brake or normally holding the phonograph mechanism stationary against spring tension, means connecting the switch hook of the telephone set with the brake mechanism for holding the switch hook in normal position, a motor, an electric circuit for operating the motor containing circuit closing devices, means for holding the phonograph needle normally out of engagement with the record, means actuated by the motor for releasing the brake mechanism and the switch h'ook, means for subsequently shifting the needle holding means to permit the needle to be brought into operative engagement with the record, and means for automatically applying the brake when the alarm has been sent in.

4. A burglar alarm comprising a telephone set, a phonograph disposed near the set, a brake for normally holding the phonograph mechanism stationary against spring tension, means connecting the switch hook of the telephone set with the brake mechanism for holding the switch hook in normal position, a motor, an electric circuit for operating the motor containing circuit closing devices, means for holding the phonograph needle normally out of engagement with the record, means actuated by the motor for releasing the brake mechanism and the switch hook, means for subsequently shifting the needle holding means to permit the needle to be brought into operative engagement with the record, means for automatically applying the brake when the alarm has been sent in, and for restoring the switch hook to its normal position.

5. A burglar alarm comprising a telephone set, a phonograph disposed near the set, a brake for holding the phonograph mechanism stationary a ainst spring tension, means connecting t e switch hook of the telephone set with the brake mechanism for holding the switch hook in normal position, a motor, an electric circuit for operating the motor containing circuit closing devices, a support secured to the casing of the phonograph for manually holding a needle out of engagement with the record, the movement of the reproducer which bears the needle serving to bring the needle into operative engagement with the record, and means actuated by the motor for simultaneously releasing the brake mechanism and the switch hook.

FRANKLIN ADELBERD TERRY. Witnesses:

. J. R. CORNELL, M. I. KEANE.

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