Matches 1 - 50 out of 94 1 2 >


Match Document Document Title
6081184 Self-protected, low emission electronic device for driving a warning horn  
A self-protected, low emission electronic device for driving a warning horn includes a coil powered from a battery through a control push-button adapted for operation by a user and included in an...
5457437 Sparking free circuit of electric horn  
An electric horn which comprises a diaphragm held at its peripheral portion in a housing of the horn and having an armature attached to a middle portion thereof; an electromagnet having a coil and...
4694290 Readiness indicator for laser medical instruments  
Readiness for operation of laser medical instruments or of flash generators for ophthalmological instruments is indicated in such a way that the readiness signal is perceptible only to the...
4664055 Alarm horn  
An alarm horn includes a one-piece molded body which includes a casing portion having opposite open ends, and a first horn disposed in the casing portion and having opposite open ends. The first...
4540975 Electric horns  
An electromagnet is formed of a combination of an iron support, an iron piece, and a solenoid, and an interrupter is provided to intermittently excite said electromagnet. A cylindrical diaphragm,...
4398182 Electromagnetic horn  
An electromagnetic horn has a diaphragm, tone disc, spacer and mass which are clamped together between an abutment shoulder and an annular rib on an internally screw-threaded sleeve, the annular...
4396908 Electromagnetic warning instrument  
An electromagnetic warning instrument has a housing equipped with at least one core carrying an operating electric coil, and a contact-breaker cooperating with a vibrating armature fast with a...
4275389 Electrical assembly  
An electrical horn has a hollow body fitted with a diaphragm secured to an armature. A self-supporting coil is disposed with clearance in a recess in the body. The coil has no central former but...
4250497 Vibration-resistant coupling for insulated electrical conductor  
An insulated wire subjected to mechanical vibrations, such as a supply lead or an electromagnetic coil of an automobile horn or other sound generator, is partly received in a groove of a...
3886546 Electric horn  
An electric horn is provided which comprises a vortical acoustic transformer having a sound inlet port, an electromagnetic vibrating mechanism disposed at a central portion of the transformer and...
3760411 AUDIO SIGNALLING DEVICE  
An audio signalling unit including a housing body made of molded synthetic plastic material and having an end wall and transversely extending side walls defining an opening into the housing body....
3735311 VIBRATOR TYPE ELECTRICAL CIRCUIT INTERRUPTER  
A vibrator type electrical circuit interrupter having normally closed breaker contacts which establish an energizing circuit for an associated electrical coil and which are operated to an...
3656155 ELECTROMAGNETIC HORNS  
An electromagnetic horn comprises a casing, a resilient diaphragm closing the casing, an electromagnet carried by the casing, an armature associated with the electromagnet and secured to the...
3653039 ELECTRO-MAGNETIC HORNS  
An electromagnetic horn has a cup-shaped housing the base of which is flat. Supported on the base is an electromagnet in circuit with which is a contact assembly supported by the housing. Both the...
3631480 ELECTRICALLY OPERATED SOUND GENERATORS  
An electrically operated sound generator includes a casing housing a solenoid. A fixed contact is positioned within the casing and is engageable by a movable contact carried by the armature of the...
3456254 ELECTROMAGNETIC HORNS  
1,046,747. Horns. JOSEPH LUCAS (INDUSTRIES) Ltd. Aug. 12, 1965 [Aug. 28, 1964], No. 35455/64. Heading G5S. During stoving of an enamelled electromagnetic horn of the type shown, air in the horn...
3408645 Sound signalling device having diaphragm and striker apparatus  
1,056,666. Electromagnetic horns. V. & E. FRIEDLAND Ltd., G. R. LAWTON and J. DOGGART. Oct. 1, 1965 [Oct. 7, 1964], No. 40952/64. Heading G5J. A warning horn comprises a hard plastics moulding,...
3271760 Electromagnetic diaphragm horn  
3242483 Electro-magnetic motor and frame member for horns  
2942255 Horn frame construction  
2941198 Electric horns  
2839746 Electromagnetic device  
2803004 Electro-magnetic diaphragm horn and circuit breaker therefor  
2784399 Sound producing fish lure  
2740959 Electromagnetic sound producing device  
2740958 Magnet motor for vibrating diaphragm sound signals  
2707781 Sound signals  
2700761 Electromagnetic horn  
2587513 Electric horn  
2501234 Electric horn  
2340604 Sound signal apparatus  
This invention relates to sound signal apparatus, and more particularly to signalling or alarm devices of electrically operated type, such as horns, and to control means for signalling apparatus...
2338640 Solenoid operated electric vibrator  
This invention relates to solenoid operated electric vibrator or audible signal devices and has for its object to provide such a vibrator which is rugged in construction and reliable in operation....
2305953 Audible signal system for vehicles  
My present invention relates to audible signal system for vehicles and involves an audible signal device or devices commonly referred to as horns. In carrying out the invention, the conventional...
2304095 Method of and apparatus for inducing and sustaining sleep  
This invention relates to a method of an apparatus for inducing sleep. It is known that during sleep the respiration becomes slower and deeper. Often the respiratory movements become periodical in...
2299671 Electromagnetic motor switch  
This invention relates to electromagnetic motors, for example, the electromagnetic motor used for vibrating the diaphragm of an electric horn. In an electric horn, the movable armature of the...
2261656 Acoustic device  
This invention relates to acoustic devices, more particularly to variable volume horns suitable for use with automobiles. With the increasing velocity at which average automobiles move on the...
2248669 Electromagnetic horn  
The invention relates to electromagnetic signalling horns, in which a common current carrier is provided for the interrupter and the condenser, and which are especially intended for use on motor...
2240255 Horn  
The present invention relates to an electromagnetic horn and is an improvement upon the electro-magnetic horn disclosed in Lee M. Wiley Patent No. 2,193,544 of March 21, 1940. The principal object...
2203420 Warning signal  
This invention relates to improvements in a horn or warning signal for motor driven vehicles and which comprises a vibratory diaphragm operated by an electric motor of the magnetic type. One of...
2193544 Horn unit and mounting thereof  
The present invention relates to electromagnetic horns and means for mounting the same. One object of the invention is to provide a power unit for a horn of improved construction, 5' which unit is...
2165582 Electromagnetic motor for warning signals and the like  
This invention relates to improvements in an electric motor of the magnetic type for operating a warning signal or the like. As is well known, horns or warning signals of this type usually...
2145711 Sounding signal device  
This invention relates to sound signal devices and especially to horns for automotive vehicles, wherein a diaphragm is electro-magnetically actuated to operate the horn. One of the objects 0 of...
2120028 Sound producing device  
My invention relates to devices for use particularly in sound producing units, warning signals such as are used in automobiles which are electrically operated from a direct current source, and for...
2074875 Synthetic tone signal  
This invention relates to the control of sound production more especially for signalling. This invention has utility when incorporated in predetermining sound or sounds and the projection thereof....
2064048 Vibratory motor  
This invention relates to vibratory motors for horns or sound signals for power vehicles and more particularly to the type of vibratory motors used in sound signal which employs a diaphragm in...
2060911 Sound signaling  
This invention relates to diaphragm actuation. This invention has utility when incorporated in electric sound signaling, especially in horns for motor vehicles, marine work, alarms, code...
2018479 Electromagnetic horn  
The present invention relates to electro-magnetic horns more particularly for motor vehicles. The object of the invention is a simple construction which is easily manufactured and which, in spite...
2011957 Audible signal  
This invention relates to audible signals This invention has utility when incorporated in electric horns, more especially of the magnetic Stype as involving features of construction and adjustment...
1938679 Speed indicating, control, signal, and alarm device  
1922397 Signal horn  

Matches 1 - 50 out of 94 1 2 >