US2561481A - Alarm for deaf persons - Google Patents

Description

P. RODY ALARM FOR DEAF PERSONS July 24, 1951 Filed May 14, 1948 IN VEN TOR. PA 500/91,)? IP00 y iza Patented July 24, 1951 J j UNITED ,j; BATE-NT". 4 OFF I CE y V i ,'5. '":2 ';5 1 4 1 I v Q ALARM FOR DEAF PERSONS Pasquale Rudy, Philadelphia, Pa.

Application May 14, 1948, Serial N 0. 27,004

1 Claim.

This invention relates to an alarm in connection with a time piece, and more particularly to an alarm adapted for use of deaf persons to arouse them from sleep.

An object of this invention is to provide an alarm whereby unheard vibrations rather than sound may be used to arouse a person.

Another object is to provide means whereby an electrically-driven clock will set such an alarm, remotely located, into action.

A further object is to provide means whereby such an alarm may be supported on and transmit vibrations to the frame of a bed or other suitable furniture.

A further object is to provide an electric alarm device having an operating member resonant to the frequency of the actuating current or to multiples of sub-multiples thereof.

Still further objects and advantages reside in the combination and arrangement of parts, as will be hereinafter more fully described and readily understood by reference to the accompanying drawings in which:

Figure 1 is an elevational view showing the main features of the invention.

Fi ure 2 is an elevational front view of the timepiece or clock.

Figure 3 is an elevational rear view of the clock.

Figure 4 is a front elevation of the alarm device.

Fi ure 5 is a side elevation of the alarm device.

Figure 6 is a plan view of the alarm device.

As shown in Figure 1, an electric clock Ill, having contacts adapted to close an electrical circuit at a predetermined time, is connected to a source of current H by means of conducting cord I2, and to the alarm device generally designated as I3 by means of a conducting cord l4. The alarm device I3 is secured to the frame I5 of a bed It in such manner that vibrations produced by the alarm device will be conveyed by means of the bed frame IE to the sleeper in the bed.

In Figure 2 is showmin front elevation, the,

clock l provided with an off-on switch II, an alarm setting knob I8, and alarm time-indicating hand I9.

On the rear of the clock In is shown, in Figure 3, a socket l9a connected to the alarm contacts within the clock into which the plug of conducting cord l4 may be inserted.

The alarm device l3 consists, as shown in Figures 4, and 6, of an electromagnet coil 20 with casing or cover 20a, supported on a magnetic core 2| having a pair of perpendicularly disposed arms or pole pieces 22 and 23 which are also used to support the insulated terminal posts 24 and 25 of the coil conductor.

- post I5.

Pole-piece 23 is slightly higher than pole-piece 22 and one end of a vibrational armature 26 is secured at one end to pole piece 23 by means of screws or rivets 28 and its free end is provided with a hammer 29. An armature spring 26a, secured at one end to armature 26 by riveting or otherwise, is attracted to pole-piece 22 when alternating or pulsating current is supplied to the magnet coil 20 and thus vibrates the armature 26 causing the hammer 29 to strike the bed The vibrations of the bed-post are then conveyed to the person in the bed.

Armature spring 26a and armature 26 may be so proportioned in size and weight as to respond to the frequency of the applied current or to multiples or sub-multiples thereof and thus render a resonant or harmonic response with respect to the frequency of the actuating current. If it is desired to use direct current the armature spring 26a may be provided with electrical make and break contacts (not shown) in the usual manner such as is used, for example, in an electric bell operated by batteries.

A non-magnetic supporting bracket 29, secured in any suitable manner to pole-pieces 22 and 23, may be used to attach the alarm device l3 to a bed or other furniture by means of screws 24.

It will be understood that when the plug of conductor I2 is inserted in the receptacle H and the plug of conductor I4 is inserted in socket Illa on the back of the clock ill, the necessary current will be supplied to operate the clock, and the alarm device I3 will also be operated whenever its circuit, which is connected to the main circuit in the clock, is closed by the contacts in the clock at the hour set by means of knob l8 provided olfon switch I! is set in the proper position.

It will also be understood that various modifications and changes may be made in this invention without departing from the spirit and scope thereof, as set forth in the appended claim.

What is claimed is:

An alarm device comprising a vertically disposed electromagnet adapted to be positioned below and spaced from the rail of a bed and fixed-- ly secured thereto, a vertically disposed armature positioned on one side of said bed rail and connected to said electromagnet for vibratory movement toward and away from said bed rail, a hammer projecting transversely of said armature adjacent the upper end thereof and engageable with said bed rail upon vibratory movement of said armature toward said bed rail, an alarm clock including a time switch, and circuit-connecting means connected between said time 3 switch and said electromagnet for actuating said UNITED STATES PATENTS armatqre and sa id pammer at a selected time Number Name Date determmed by sald tlme swltch. 733,301 Hedman Sept 5 1903 900,293 Metz Oct. 6, 1908 PASQUALE RODY- 5 924,127 Arms June a, 1909 2,117,064 Ketay May 10, 1938 2,128,250 Howard et a1 Aug. 30, 1938 REFERENCES cITED 2,134,028 Caldwell 1 Oct. 25, 1938 The following references are of record in the ,462 Nawells J1me 1, 1943 file of this patent: 10 2,396,947 Gutteridge Mar. 19, 1946 2,460,133 La. Pedus Jan. 25, 1949

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