DE1922640C3 - Mechanical oscillator that can be used as a frequency standard for time-keeping devices - Google Patents

Description

Patent 1,773,678 makes a mechanical one that can be used as a frequency standard for time-keeping devices Schwinger suggested in which the the

potential energy of the oscillator essentially absorbing oscillator part from a first Plane extending flat, elongated two-armed fork, whose symmetrical to a second plane, which intersects the first plane perpendicularly, is provided on its arms next to one another one end connected to each other and provided with a fastening part and at the other end, free end each carry an additional mass, which essentially consists of fork arm and additional mass existing partial oscillators are designed similarly that they are in planes perpendicular to the first Level to antiphase flexural vibrations of the same frequency can be excited with the free ends of the Gabclarme connected additional masses with respect to their centers of vibration on the other side of the second level as the centers of vibration of the fork arms connected to these masses, and although at such a distance that the viii the fork arms around the intersection axis of the first with the second level exerted torques by the torques exerted by the additional masses each partial oscillator are just compensated, and the additional masses of the fork arms are designed and are provided with additional facilities that the frequency standard on the one hand by a fixed Device, in particular drive coil, can be excited to an undamped oscillation and on the other hand can be coupled to a rotating display mechanism.

In one embodiment of this mechanical oscillator, one part oscillator is provided with devices for vibration excitation and the other partial oscillator with devices for switching of an advertisement.

An embodiment that is even simpler in its structure and improved in its mode of operation of the mechanical oscillator according to the main patent results according to the present invention by that one of the two partial oscillators both with the devices for vibration excitation and with the devices for driving the display mechanism is provided. This has the advantage that a Partial oscillator can vibrate completely freely; it will

• · ■ "it is necessary to not only the other part Schwinger both the drive side for this ^{ZusaU1! L'J!} | Jj _{1 z} β brass sheet, too wlihihiber the mutual influence between working ferromagnetic "^. ^^ / _{with the} magnetic fields,! coil and permanent magnets as well as lcn on the output side to create a \\ ec τ..t ^ _dl ? _r drive and control over the mutual influence between the to the other head e. - ^ _ochkantstc || _un g of the sheet-Forlschaltung serving magnet and the rotatable 5 quill to y £ ^rm _d "y _in the vibration direction results in cash drive wheel bedämpit Thereby, a parts 22, -.. ^ air damping 'un''reaches this free increased accuracy addition results in a especially <- - _{those on} both sides

the advantage that the additional mass of the completely freely vibrating ^bL ™ _m ^r _{Gabc) arm} ι attached head-swinging part oscillator are shaped in addition to the on, ^ _{1 2} y are in the

can that for the oscillator lying in the _{direction of} oscillation 10 - olej (. _hen distance from which a particularly small air damping results and shown ^^ jjj ^,, | < _is j _{e [loc} h longer than dr also a simpler structure of this additional mass • *; '- ^v ~ ^E ^ ^c " ^e ', ^Γ ,, ' \\ _i \ _i oTcse additional mass ai: i is made possible. Leg -J wt · _{% v} ; _level compensated at

Fin embodiment of the invention is based on the other sun. , ''; _dc <] j _{e From} the fork-hand of the Fis. 1 to 3 described in more detail below. 15 Schwingungsvorgant f _practiced torques, ben. lis represents arm V around the ^ AehM. ^^ ^ ^ ^^

Fig. 1 changes the mechanical oscillator in one anchoring to _{design a} bracket 23 ',

looks in the direction of oscillation, 22 'the same, large * j ^ ^^ _sizes . _{n descent |}

I · ig. 2 to provide the transducer shown in FIG.

seen from the side and * · from the y-axis a.sce _{indende G} abclfuß .1

Fig. 3 shows the mechanical oscillator according to ^Dcr f ^{ie Ga:} _r T _u 'm, idung provided notches 5

1 and 2 seen in a view from above. is separated by with a / the two next to

"* Having ¹ J ^ 'via which the nischcn oscillators each other hegende for vibration excitation dom" In the example illustrated in FIGS. 1 to 3 mechanically from the B ^cfust f ^ _f ^ _Untcrlage, one with a fixed insulating member 15 25 transducers using * .nrau

e.g. by gluing, firmly connected control and attached is preceding

^{Arbeitspulel6} and 17 provided, for example via Die "irkun S ^s . ^wt ' _n ¹ r ;. _h - _n Schwingers is analogous to the

a transistor amplifier coupled with each other wrote mechamsciκη ^^ _Schwingcrb , _s .

are. In these coils 16 and 17 protrudes to a part of the """/'^Ρ^'^Λ,^^.^^ 16 and the work in coaxially to the coils located cylindrical 30 game. If uie ο -ι _estcjltc amplifier unit permanent magnet 13 ', which is provided with an end face, e.g. B. coil 17 via tine 111 * '" _{c eleglj s0} can

An attached portion chair with sheet metal part 1Γ the Blechform- over the Magnuen1 _dämp f _len vibration _| by gluing, to the existing soft iron direction of ^cin \ ^ ^{a "n,} p _dn!...

Part 11 'is located on the same level as a foot part 12', which is _{attached to the vibrating arm 1 ™ £ P «£« en G} ^{P abelfuB 3.} through which the shaped sheet metal part 11 ', for example 35 generation ^e ^ 8 ^w J ™. ^Ln '^ ^V - ^ _the oscillating arm 1' by spot welding, at the free end of the other Te. black "8" ™ _w e _{) cicher frequency}

Gabclarrr.es 1 is attached. The shaped sheet metal part 11 'of an anti-phase rotation _B has three being excited at right angles to one side. Vibration quality of the

bogcnc tabs 14 'on which the coils 16 and 17 en requirement for _B ho he Be ^ _JB

embrace from the outside and a field yoke 4 "vibrator st he also | ena _{Balanced Jack} ^ _ric.

for that generated by the permanent magnet 13 'in the main palent in detail y

Form magnetic field. conditions _mctri ebcdingung after the

The sheet metal part 11 'also has two further ^ - wcjnthcte Sjmmct b ^

Flaps 24 'on, which exist at right angles to the other Ha uplpaUn t ^ _{or their}

Side are turned off. Between the ends of these 45 m, l s ^ J ^ J ^ S ,, 'located heavy flap 24' are separated coaxially zueinandei and through a 1 g ^{CIC «n} ^ ¹ ^ _6n ^g _Abstan d narrow on the other air gap from each other, two thin point in e η em ^ J _{as the} vibrational

cylindrical magnets 25 ', e.g. B. by gluing or Se te the v; ^ ^Mm "JJ _{ri fork arm} e and their pressing, attached. The delimiting the air gap in the middle η, m dt ^ J ^ l ^ e _gelegcnen Schwcrdcn ends of the magnets 25 'are frustoconical ₅ o in the same ^''ngungscbcne g y .

tapered towards the end face. The two magnets 25 '^ J ^ g ^ i ^^ LTno torques are magnetized in the same direction. The lobes ^8ern . ^b , ^c ™ ^^ S 'are expediently wer-24' and the sheet metal 11 'form a field inference around the y-axis uD: weru ■ ^b

for the magnetic field of the two magnets 25 '. In the d here ^ e ta ^^ ^ JJG / _{dic ate} air gap is a highly directional magnetic field forward 55 tnsch 'J * "^ M' ^ Maintenance ^ 8 · _s

tied up. This magnetic field penetrates a co »soft to ^^ ^s ^ '" gungsm · "resulting

existing iron, toothed and around a shaft 27 of the additional masses and partial

rotatable drive wheel 26 for an indicator. ^Sch ^ ⁿ 8 ^{u "8} ^ '" _m% ^ _n "" nJ _r ° to the common consists in the illustrated embodiment ger at ^rest ™ ⁿ f ^r' "" _{d dcr} ν -Symmedie additional mass of the fork arm 1 'of a high- 60 point of the x, y-symmetry plane and the>, ..> ym

the additional mass of the fork arm 1 from a

U-shaped ^tric ; ^be """ _ß 7 ~ ^ _here those for the excitement

Formed sheet metal part 22 ', 28, 23', which with an angled J ^ corner dimension f ^ "S ¹¹ ^ _{n Mag} netel3 'and 25'

s s'saa-r'Ä'üSEÄir-'ii ^ ^6S

1 sheet of drawings

Claims (5)

Patent claims: 1. Mechanical oscillator that can be used as a frequency standard for time-keeping devices, in which the oscillator part which essentially absorbs the potential energy of the oscillator consists of a flat, elongated, two-armed fork extending in a first plane, their symmetrical to a second plane intersecting the first plane perpendicular to each other provided arms connected to one another at one end and with a fastening part are provided and each carry an additional mass at their other, free end, wherein the component oscillators consisting essentially of fork arm and additional mass are so similar are designed to be out of phase in planes perpendicular to the first plane Bending vibrations of the same frequency can be excited with the free ends of the fork arms connected additional masses with respect to their centers of vibration on the other side of the ywciti.'n level as the vibrational transmitter with these masses connected fork arms are, and in such a distance that the of the fork arms about the intersection axis of the first with the second plane exerted torques due to the torques exerted by the additional masses for each part oscillator be compensated, and the additional masses of the fork arms designed and with additional Facilities are provided that the frequency standard on the one hand by a fixed Device, in particular drive coil, can be excited to an undamped oscillation and on the other hand can be coupled to a rotating display mechanism, according to patent 1773,678, thereby characterized that one of the two Teilschwingcr both with the devices for vibration excitation and with the Means for driving the display mechanism is provided. 2. Mechanical oscillator according to claim 1, characterized in that the additional The mass of one fork arm consists of a Blcchformteil, one in Permanent magnets (13 ') located in the direction of oscillation for generating vibrations and on the other side at least one magnetic field running transversely to the direction of oscillation generating second magnet for driving an indexing wheel for a pointer mechanism. 3. Mechanical oscillator according to one of claims 1 or?, Characterized in that that the shaped sheet metal part consists of a ferromagnetic material and is angled in the direction of vibration to different sides Approaches (14 ', 24'), the one approach (14 ') as a back yoke for the exciter magnet (13 ') and the other approaches (24') / around fastening and as a field inference of two Shift magnets (25 ') are used. 4. Mechanical oscillator according to claim 3, characterized in that the indexing magnets (25 ') are tapered at the opposite ends. 5. Mechanical oscillator according to one of claims 1 to 4, characterized in that the one on the other fork arm that is not used for .Schwingungserregung and switching additional mass from an integral sheet metal part made from a non-ferromagnetic one Material, e.g. B. Brass, consist; fi. Mechanical oscillator according to Claim 5, characterized in that the sheet metal shape.; Ci! of the other fork arm from one in the direction of oscillation seen in a U-shaped angled sheet metal part (22 '. 28. 23'} with a mounting attachment (2Γ) at dom der on the other hand: en Side of the second level as the swing arm j Γ) located one leg (22 ') is selected larger or heavier than the other leg (23').