US2339973A

US2339973A - Vibrator mounting

Info

Publication number: US2339973A
Application number: US451125A
Authority: US
Inventors: Robert J Aust
Original assignee: PR Mallory and Co Inc
Current assignee: Duracell Inc USA
Priority date: 1942-07-16
Filing date: 1942-07-16
Publication date: 1944-01-25
Anticipated expiration: 1961-01-25

Description

v R. J. AUST VIBRATOR MOUNTING Filed July 16, 1942 [lill/llllllllllll/llllllllllllll /uiiiiiiiilnw lg II vibrator embodying 4 voltage batteries to provide Patented Jan..2'5, 1944 UNITED STATES PATENT oFFlcE Robert J. Aust,

P. R. Mallory 8 Claims.

'This invention relates to vibrators, particularly Ielectromagnetic vibratory interrupters of the periodically open and vclose elecf type adapted to tric contacts. The present application is a continuation of my prior filed, co-pending application Serial No. 400,697, filed July 1, 1941.

An object of the invention is to improve the mounting and sound insulation of electromagnetic vibrators.

Other objects of the invention will be apparent from the following description and accompanying drawing'taken in connection with the appended claims.

The invention comprises the features of construction, combination of elements, arrangement of parts, and methods of manufacture and operation referred to above or which will bebrought out and exemplified in the disclosure hereinafter set forth, including the illustrations in the drawing.

In the drawing: Figure 1 is a longitudinal section through a features of the invention; Figure 2 is`a section on the line 2-2 .of Fig-I ure 1;.

Figure 3' is a perspective view off a ymetal disc comprising part of the vibrator mounting;

Figure 4 is a longitudinal section through a vibrator -of modified construction alsoembodying features of the invention; and ,Y Figure 5 is a perspective view of a supporting cap comprising-part of the mounting means for the vibrator of Figure 4. f

Vibrators of the type described have been used fora great many years in conjunctiorrwith low rent which can be stepped up in voltage by a transformer and rectified if desired to provide a high voltage power supply. Their principal application has been'in providing a By powerA supply for automobile and aircraft radio sets although many general engineering and scientific applications of the device have also been developed.

It will be obvious that in the use of vibrators in connection with radio sets and. also in" some of the other uses, any substantial mechanical noise or vibration is objectionable, and `would seriously affect the desirability'of vibrators as power supply supplements.l Due to the manner. of functioning of the vibrator, however, there is always developed a certain amount of vibration and buzz during operation of the vibrator mechanism.

Heretofore, mechanical vibration and noise has an interrupted cur- Indianapolis, Ind., assignor to & Co., Inc., corporation of Delaware Application July 16, 1942, Serial No. 451,125

Indianapolis, Ind., a.

cases, however, the soundinsulating material is also an effective heat insulator and hence has materially reduced the rate of heat transfer from the vibrator mechanism to the outer atmosphere.

This has considerably limited the capacity rat.

ings of commercial vibrators, it being necessary to limit the current or power handled by a vibrator to a value which will not cause deleterious overheating. This value is considerably below the quantity which could be handled if more effective cooling were available. It will be appreciated that a considerable quantity of heat is generated by Ithe vibrator due to the electrical losses in the electromagnetic winding and circuits, heat developed at the contacts and connections to same and heat generated by the me chanical motion.

A feature ofthe present invention resides in Aan improved means for mounting the vibrator mechanism whereby adequate isolation of'sound andY vibration is obtained while at the same time the rate of heat dissipation is materially improved. 'Ihis is preferably accomplished by eliminating part or all of the sponge rubber or feltl insulation and supporting the vibrator at one end by flexible strands or wires which may also comprise the electric conductors for the vibrator, the strands having associated therewith 'means for -conning their movement sothat the vibrator mechanism is effectively held away from direct contact with the container. Another feature resides in the use of a novel supporting cap of relatively thin pressed springy material and still other features will be obvious from the following detailed description.

vWhile a preferred embodiment of the invention isl described herein, it is contemplated that considerable variation .may be made in the method of procedure and the construction of parts without departing from the spirit of the invention. In lthe following 'description and in the claims, parts willbe identified by specific names for convenience, but they are intended to be as generic in their application to similar parts as the art will permit.

Referring tothe drawing, Figures 1 and 2 are cross-sections of a vibrator embodying features of the present invention, lthe vibrator mechanism comprising a frame I0 supporting an electromagnet I I at one end thereof and "a stack assembly I2 at the opposite end thereof supporting a vibratory reed I3 and vibrator contacts Il which are opened and closed by the vibration of the reed. The vibrator mechanism is mounted within a metal can I5 but is supported out of direct mechanical or vibration-transmitting contact with the can by a sponge rubber cap I6 at the magnet end thereof, and the three insulated electric connecting wires I1 at the stack end thereof.

The can is provided with an internal bead I8 near its free end and a closure disc I9 of sheet insulating material closes the end of the can and is securely held in place between the spun over end of the can and bead I8.

In order that the stack end oi the vibrator' mechanism shall be held away from the can wall and be supported in a iiexible manner to limit the transmission of sound and vibration to the can wall, a dished metal partition disc 20 (shown in perspective view in Figure 3) is provided inside closure disc I9 and is held clamped between disc I9 andbead I8 of the can. Disc I9 carries a plurality of connecting prongs 2| projecting outwardly -for inserting in a suitable socketwhereby the vibrator may be connected to an externalcircuit. The insulated wires I1 within the can connect prongs 2| and the elements of the vibrator assembled in stack I2. There are ordinarily 3 or more wires I1 connecting the prongs 2l with the vibratory mechanism. Disc 20 has n relatively small center aperture 22 therein through which conductors I1 pass. It will thus be seen that the conductors are gathered together in a central group or cluster where they pass through aperture 22, and thus effectively center the end of the vibrator mechanism within the can holding it in a flexible vibration-isolating support away from the can walls. ySince the wires I1, when thus gathered together in a central group which passes through aperture 22 are only slightly longer than the distances from their respective terminals to the vibrator mechanism` lthrough the aperture, it is obvious that the wires will not permit the end of the vibrator mechanism to be moved materially away from its cenv tral position.

edges provided by curling over the metal of the disc in order to prevent utting through the insulation of wires I1.

Figure 4 illustrates a modiiication which is generally similar to that shown in Figure 1 with the following exceptions: l

A pressed cap Ilia .(see Figure 5) is substituted for sponge rubber cap I6. Cap lia may be pressed from a disc of springy material such as cardbbard, fibre, heavy paper or resin impregnated iibre or paper. Cap Ilia comprises a central, substantially at, disc shaped portion 30 and a marginal portion 3I comprising a series of pressed corrugations or flutings extending to the free edge of the cap. Due to the springiness of the material when it is inserted Within the can I5 the fluted marginal portion tends to expand and press against the sides of the can, the cap thus providing a springy support Within which the endof the vibrator may be held. The

Figure 4 also shows the use of a substitute for metal disc-20 in-the form of a springy plain disc 20a of bre, cardboard, fibre or cardboard impregnated with Bakelite or other resin of simil'ar relatively stiff springy material. When the unit is assembled as shown and the end of the can spun over disc I9, the resulting pressure bends disc 20a into a dished shape (exaggerated in Figure 4. The springiness of disc 20a, however, tends to return it to at shape thus affording a springy mounting supplementing the flexibility of insulating conductorsl I1.

Where rubber materials are used within the vibrator can, they tend to melt and harden or decompose when overheated. The assembly of Figure 4 completely eliminates rubber from the inside of the can thus raising the temperature at which the vibrator can operate without damage.

While-the present invention,L as to its objects and advantages, has been described herein as carried out in specific embodiments thereof, it is not desired to be limited thereby but it is intended to cover the invention broadly within the spirit and scope of the appended claims.

What is claimed is: 1

1. I-n a vibrator comprising a vibratory interrupter mechanism, a can enclosing said mechanism, an insulating end disc secured in 'the free end of said can, terminals mounted in said end disc and flexible conductors inside said can connecting said mechanism to said terminals, a stii! apertured-partition inside said can between said mechanism and said end disc engaging said conductors and grouping them to gether in a cluster at their mid-portions to prevent any substantial loose-play thereof, whereby the part of said mechanism to which said conductors are connected is held in a resilient manner solely by said conductors and partition out of contact with the wall of said can.

2. In combination, la vibratoryy interrupter mechanism, a container enclosing said mechanism having an insulating end wall, a plurality `of terminals secured to said end wall in spaced relation to each other, iiexible insulated conductors connecting said terminals with an end of y,said interrupter mechanism and a stii partition interposed between said mechanism and said insulating end wall, said partition having a centrally located aperture therein, said ilexible conductors passing through said aperture whereby they are grouped in a cluster resiliently supporting the end of said mechanism to which they are attached and holding said mechanism out of contact with `side walls of said container. l 3. In combination, a vibratory interrupter mechanism, a cylindrical can enclosing said mechanism and an insulating end disc for said -l can, a plurality of terminals secured tovsaid end disc in spaced relation to each other, flexible insulated conductors connecting said terminals with an end of said interruptor mechanism and -a stiff partition disc interposed between said 2,339,973 ywhich they are attached and holding said 'mechanism out of contact with the cylindrical wall of said can, the resiliency of said conductors and their insulating coverings affording vibration isolation between said mechanism and said can.

4. In combination, an elongated electromagnetic vibratory interrupter mechanism and exible insulated conductors connected at the iirst end ofsaid interrupter mechanism with the operating parts thereof, a cylindrical can enclosing said mechanism and an insulating end disc for said can, a plurality of terminal prongs secured in said end disc and projecting outward therefrom in spaced relation to cach other, said exible conductors being connected respectively to the inner ends of said prongs, and a. partition disc interposed between said mechanism and said end disc and held at its edge -by said can, said partition disc having a centrally located aperture therein, said exible conductors passing through said aperture whereby they are grouped in a cluster resiliently supporting the first end of said vmechanism and holding said mechanism in a resilient manner out of contact with the cylindrical wall of said can, and a resilient cap over the second end of said mechanism and engaging the Wall of said can.

5. A vibrator comprising an elongated electromagnetic interrupter mechanism, a cylindrical can enclosing said mechanism and having an internal shoulder near its free end, an insulating end disc closing said free end and havving a plurality of mutually spaced terminal prongs mounted therein and extending outwardly therefrom, a plurality of iiexible .insulated conductors connecting said prongs to the nearest end of said mechanism within the can, means resiliently supporting the other end of said mechanism out of contact with said can and a stii partition disc between said mechanism and said end disc having a central aperture, said conductors passing through said aperture in a grouped cluster resiliently supporting the nearest end of said mechanism and holding said end out of contact with said can, the free end oi said can being turned inward clamping said end disc and partition disc against said internal can shoulder.

6. A Vibrator comprising an elongated electromagnetic interrupter mechanism, a cylindrical can enclosing said mechanism and having an internal shoulder near its free end, an insulating end disc closing said free end and having a plurality of mutually spaced terminal prongs mounted therein and extending outwardly therefrom, a plurality of flexible insulated conductors connecting said prongs to the nearest end of said mechanism within the can, means resiliently supporting the other end of said mechanism out of contact with said can and a stiff partition disc between said mechanism and said end disc having a central aperture. said conductors passing through said aperture in a grouped cluster resiliently supporting the nearest end of said mechanism and holding said end out of contact with said can, the free yend of said Lcan being turned inward clamping said end disc andpartition disc against said,

internal can shoulder, said partition disc being dished away from said end disc to provide a dead space therebetween.

7. In combination, an elongated electromagnetic vibratory interrupter mechanism and ilexible insulated conductors connected at the rst end of said interrupter mechanism with the operating parts thereof, a cylindrical can enclosing said mechanism and an insulation end disc for said can, a plurality of terminal prongs secured in said end disc and projecting outward therefrom in spaced relation to each other, said flexible conductors being connected respectively to the inner ends of said prongs, and a stiff partition disc interposed between said mechanism and said end disc and held at its edge by said can, said partition disc having a centrally located aperture therein, said exible conductors passing through said aperture in a grouped cluster whereby said rst end of said mechanism is substantially centered over said aperture by said conductors and effectively -held in resilient manner by said conductors out of contact with the cylindrical wall of said can, and a cup of resilient sheet bre enclosing the second end of saidpinterrupter mechanism, said cup comprising a substantially planar central portion and a fluted ange portion integrally formed around the edge thereof, said flange portion resiliently engaging the cylindrical can well. i

8. A vibrator comprising an elongated electromagnetic interrupter mechanism, a cylindrical can enclosing said mechanism and having an internal shoulder near its free end, an

.insulating end disc closing said free end and having a plurality of mutually spaced terminal prongs mounted therein and extending outwardly therefrom, a plurality of flexible insulated conductors connecting said prongs to the nearest end of said mechanism within the can, and a stiff partition disc between said mechanism and said end disc having a central aperture, said conductors passing through said aperture in a grouped cluster whereby said nearest end of said mechanism is substantially centered over said aperture by said conductors and effectively held in resilient manner by said conductors out of contact with the cylindrical drical wall of said can.

ROBERT J. AUST.