Electromechanical torsional oscillator

Claim 2

A torsional vibrator device for the creation of a constantfrequency rotary oscillation comprising in combination: a stationary inner mounting plug; an outer mounting plug in a parallel, spaced relationship thereto, and a plurality of flexible oblong reeds fixedly connected with their respective ends to said inner and outer mounting plugs, said reeds being equidistantly spaced from each other around an imaginary central axis, the profiles of said reeds being oriented so that a forcible rotational displacement of the outer plug around said imaginary axis causes bending of all the reeds around the axis of their lowest moment of inertia, thus giving the outer plug a single rotational degree of freedom, said reeds thus being capable of giving a harmonic rotational oscillation of the outer plug, the device further including: means to maintain an oscillation therein and means to change the mass moment of inertia of the outer plug so as to increase or decrease its resonant frequency.

Claim 3

A torsional vibrator as claimed in claim 1, said reeds being at least two sets of reeds in the form of flat leaf springs, the reeds of each set lying in a common plane which plane also includes the imaginary central axis.

Claim 4

A torsional vibrator as claimed in claim 2, having two sets of reeds, the planes of two sets being perpendicular to each other.

Claim 5

A torsional vibrator as claimed in claim 1, said plugs being circular, said reeds mounted radially with their outer edges adjoining the outer circumferences of said plugs, and perpendicularly to the said plugs.

Claim 6

A torsional vibrator as claimed in claim 4, said reeds being at least two pairs of reeds, the reeds of each pair being mounted opposite from each other in a common plane, the radius of said plugs being greater than The width of said reeds.

Claim 7

A torsional vibrator as claimed in claim 1, further comprising: a mounting plate, said inner plug mounted to said mounting plate; a two-arm shutter and an adjustable number of tuning discs attached to said outer plug; a permanent magnet attached to one arm of said shutter; a pickup coil mounted adjacent said magnet on said mounting plate; a driving coil also mounted adjacent to said magnet on said mounting plate, and an amplifier circuit connecting said pickup coil with said driving coil.

Claim 8

An electromechanical torsional oscillator device for the mechanical modulation of an apparatus measuring the frequency of electromagnetic radiations, operating independently of its position and automatically excitable, comprising in combination: a mechanical torsional vibrator having an inner stationary cylindrical plug and an outer oscillatable cylindrical plug spaced from the former along a common central imaginary axis perpendicular to said plugs to form an elongated cylindrical structure; a plurality of oblong flat leaf springs symmetrically equidistantly spaced from each other with relation to said imaginary axis; said leaf springs being connected with their respective opposite ends to both of said plugs, said leaf springs lying in planes crossing each other in said imaginary axis; said leaf springs thus being devoid of vibrating properties in any direction other than around said axis; a positionally fixed mounting plate; said inner plug being mounted to said mounting plate; a mounting sleeve mounted to the outside of said outer plug; a shielding shutter having one long shutter arm and an opposite short arm dynamically balanced with the former, said shutter having a central bore wherein it is attached to said sleeve; an adjustable number of inertia tuning discs with a central orifice for mounting on said sleeve; a permanent magnet affixed to said short arm of said shutter for movement therewith; a pickup coil fixedly mounted on said mounting plate adjacent one side of said magnet to pick up the movement of said magnet, thereby exciting an induced voltage therein; an amplifier for the pickup coil output; a driving coil fixedly mounted on said mounting plate adjacent to said magnet on the side opposite from that of said pickup coil; circuit connections between said pickup coil, amplifier and said driving coil; whereby said driving coil pushes said magnet in response to the pickup coil output, thus causing said magnet to move in response to the slightest initial displacement, thereby swinging said shutter out of its zero position, whereby the combined mass moment of inertia of said outer plug, said shutter and magnet, and of said inertia discs determines the frequency of oscillation of the shutter, given a certain overall spring constant of said leaf springs.

Claim 9

An electromechanical torsional oscillator device for the mechanical modulation of an apparatus measuring the frequency of electromagnetic radiations, operating independently of its position and automatically excitable, comprising in combination: a mechanical torsional vibrator having an inner stationary cylindrical plug and an outer oscillatable cylindrical plug spaced from the former along a common central imaginary axis perpendicular to said plugs to form an elongated cylindrical structure; a plurality of oblong flat leaf springs symmetrically equidistantly spaced from each other with relation to said imaginary axis; said leaf springs being connected with their respective opposite ends to both of said plugs, said leaf springs lying in planes crossing each other in said imaginary axis; said leaf springs thus being devoid of vibrating properties in any direction other than around said axis; a positionally fixed mounting plate; said inner plug being mounted to said mounting plate; a mounting sleeve mounted to the outside of said outer plug; a shielding shutter having one long shutter arm and an opposite short arm dynamically balanced with the former, said shutter having a central bore wherein it is attached to said sleeve; an adjustable number of inertia tuning discs with a central orifice for mounting on said sleeve; a permanent magnet affixed to said short arm of said shutter for movement therewith; a pickup coil fixedly mounted on said mounting plate adjacent one side of said magnet to pick up the movement of said magnet, thereby exciting an induced voltage therein; an amplifier for the pickup coil output; a driving coil fixedly mounted on said mounting plate adjacent to said magnet on the side opposite from that of said pickup coil; circuit connections between said pickup coil, amplifier and said driving coil; whereby said driving coil pushes said magnet in response to the pickup coil output, thus causing said magnet to move in response to the slightest initial displacement, thereby swinging said shutter out of its zero position, whereby the combined mass moment of inertia of said outer plug, said shutter and magnet, and of said inertia discs determines the frequency of oscillation of the shutter, given a certain overall spring constant of said leaf springs.

Claim 10

A mechanical-electrical oscillator as claimed in claim 7, said plurality of leaf springs being two pairs of leaf springs, the leaf spring of each pair being mounted radially in opposition to each other in a common plane, the planes of the two pairs of leaf springs being perpendicular to each other, the radius of said plugs being greater than the width of said leaf springs.

Claim 11

A mechanical-electrical oscillator as claimed in claim 7, said plurality of leaf springs being two leaf springs axially mounted perpendicularly to each other, the length of each leaf spring being about equal to the diameter of said plugs.