US1327124A - Signaling device for motor-vehicles - Google Patents

Description

M.. TIBBETTS. SIGNALING DEVICEFOR MOTOR VEHICLES. APPLICATION FILED FEB-18.1916.

,327, 12 Patented J an. 6, 1920.-

"IIIIIIIA'M4 Wii 27635 is accomplished by UNITED STATES PATENT OFFICE.

MILTON TIBBETTS, 0F DETROIT, MICHIGAN, ASSIGNOR T0 PACKARD MOTOR CAR COMPANY. OF DETROIT. MICHIGAN, A CORPORATION OF MICHIGAN.

SIGNALING DEVICE FOR MOTOR-VEHICI5ES Specification of Letters Patent.

Application filed February 18, 1916. Serial No. 79,077.

To all whom it may concern:

Be it known that I. MILTON Tmim'r'rs, a citizen of the l nited States. and resident of Detroit. \Vayne county. State ofMichigan. have invented certain new and useful Improvements in Signaling Devices for Motor- Vehicles. of which the following is a specitication.

This invention relates to horns ingdevices.

One of the objects of the invention is to provide a horn, preferably of the diaphragm type. with a rotary or other device for vibrating the diaphragm. a motor for operating the rotary device, and an adjustable connection between the motor and the rotary device.

Another object of the invention is to provide a horn of the above referred to type, with an adjusting means for the rotary member that can be operated without moving the motor as a whole. I

Another object of the invention is to provide a horn of the above type with means to increase the degree of vibration of the diaphragm with the continued operation of the vibrating means. As shown, this object utilizin the heat of the motor to increase the pressure of the rotary member on the diaphragm.

Other objects of the invention and the novel features thereof will appear from the following description taken in connection with the drawings which form a part of this specification. and in which Figure 1 is a longitudinal sectional view through a horn embodying this invention:

Fig. 2 is a similar vew of part of a horn showing another form of the invention; and Fig. 3 illustrates another form of adjustrotary member.

mg means for the Referring to the drawings. 10 represents a support upon which the resonator 11 of the horn is mounted. Immediately behind the resonator is a diaphragm 12, which is provided adjacent its center with a wear piece 13 of any suitable form.

Means for vibrating the diaphragm 12 are provided in the form of a rotary member l-t which. as shown. revolves about an axis substantially normal to the diaphragm. The

or signalteeth 15 of the rotary member engage the wear piece 13 of. the diaphragm and cause the latter to vibrate. thus producing the desired sound.

'ithin the support 10 is an electric motor indicated generally at 12. The support is formed with a pair of separated bearings 16 and 17 in which the hollow armature shaft 19 of the motor is mounted. As shown, the motor has a core 40. field coils 11, armature 18 on the shaft 19. commutators 13, and brushes 11. The various parts of the motor within the support 10 may be removed therefrom by removing the piece 20 which forms the end of and is secured to the support 10 as by screws 21. Also there is a cap or cover 22 detaehably secured over the motor and support. being held on the support as by screws and being provided with suitable openings for the binding posts 21 for the electric wires of the motor.

As shown in Fig. 1, the rotary member 1% is adapted to be driven from the motor 42 through a shaft 25 which is connected at its remote end 26 to the armature shaft 19. Thus the shaft 25 passes directly through the hollow armature shaft 19 and the screw thread connection 27' between the shafts permits of ready adjustment axially of the shafts of one shaft relative to the other. For making this adjustment, the outer end 28 of the armature shaft is made square or of hexagon form. so that a wrench may be used on it to hold it stationary while the shaft is turned in it with a screw-driver or other suitable tool. A lock nut 29 secures the shafts in adjusted position. I

From the above described construction, it will be evident that the shaft 25 and consequeutly the rotary member 14 to which it is secured. may be adjusted axially of the shaft relative to the diaphragm 12 and relatively also to the motor 12 and its armature shaft 19. Thus the rotary member 14 may be adjusted without in any way moving the motor 12. it being necessary only to remove the cover 22 to expose the outer ends of the shafts 25 and 19. I

In the form of the invention shown, the rod 25 is made of a rapidly expanding metal such as aluminum, so that by a continued operation of the motor, the heat generated within the latter will cause an expansion or lengthening of the rod 25 and a consequent increase of pressure of the rotary member on the diaphragm 12, thus increasing the degree of vibration of the dia- .phragm and of course increasing the sound produced.

Patented Jan. 6, 1920.

In the form of the invention shown in Fig. 2, the outer end of the sha'ft is in the form of a reentrant head which is interiorly screw-threaded to fit the external thread 31 of the armature shaft 19. A look nut secures the shaft in adjusted position.

In the form of adjustment shown in Fig. 3, the outer end of the rod or shaft 25 is keyed to the armature shaft 19 as by the key 33, and a clamp nut 34 forms an abutment for the extreme end of the rod 25 and is threaded on the end of the armature shaft 19 to thereby adjust the outward position of the shaft 25. A lock nut 35 holds the nut 3a in adjusted position.

Other forms and modifications of the invention may be made Without departing from the spirit orscope thereof.

Having thus described my invention, what I claim and desire to secure by Letters Patent is 1. In a horn, in combination, a diaphragm, a rotary member adapted to vibrate the diaphragm, a motor having a hollow armature shaft, a shaft on said rotary member extending through said armature shaft, and keyed thereto, and an adjusting nut connecting said shafts and adapted to determine the relative positions of the two shafts.

2. In a horn, in combination, a diaphragm,

a rotary member adapted to vibrate the diaphragm, a motor, means to operate the rotary member from the motor, and means to increase the pressure of the rotary member on the diaphragm with the continued operation of the motor at a given speed.

3. In a horn, in combination, a diaphragm,

means for vibrating the diaphragm, and

means to increase the degree of vibration with the continued operation of the vibrating means at a given speed.

4. In a horn, in combination, a rotary member adapted to vibrate the diaphragm, a motor, means to operate the rotary member from the motor, and means within the motor to increase the pressure of the rotary member on the diaphragm with the continued operation of the motor at a given speed.

5. In a horn, in combination, a diaphragm, a rotary member adapted to vibrate the diaphragm, a motor, means to operate the rotary member from the motor, and means utilizing the heat of the motor to increase the pressure of the rotary member on the diaphragm with the continued operation of the motor.

In testimony whereof I aflix my signature.

MILTON 'IIBBET'IS.

adiaphragm,"

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