DEK0013207MA - - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

Registration date: February 14, 1952. Advertised on September 15, 1955

GERMAN PATENT OFFICE

A normal frequency generator with a is used to measure the time with synchronous clocks from this controlled synchronous motor with pointer mechanism. If it is known and constant with sufficient accuracy Frequency can. Vibration processes are used as a time scale. For the generation At the normal frequency, quartz oscillators are also used, among other things. Here is the control crystal usually a crystal rod of quadrati apparent cross-section, which is held in its movement knot by incisions and silk rope and through an alternating field to longitudinal vibrations. is stimulated. The rod axis runs parallel to the electrical, axis, both sides parallel to the neutral or optical axis of the quartz. By, this orientation and a selectable one Aspect ratio, the smallest temperature influence should be achieved. The one smoothed by polishing The quartz rod is at one point in its two oscillation nodes obtained through incisions Metal bracket tied with silk rope and can be closed by a box-shaped electrode arrangement Longitudinal vibrations are excited. Such training also includes screws and glass frames

509 554/225

Claims (8)

K 13207 VIIIb / 83 b and other means are used, i.e. a number of mechanically unstable construction parts, which should be avoided in the task of a new type of holder set for the invention. The invention thus relates to a holder for clock crystals in the form of rod transducers, although the rod transducer made of quartz should not be cut and tying with silk rope should be avoided. In the case of the known designs, the crystals used showed inexplicable frequency changes that were previously attributed to the property of nasty quartz. It was recognized, however, that this change in frequency can be avoided by means of a suitable holder, in which it is important that the quartz can act undisturbed in natural oscillations. Furthermore, it was recognized that the electrodes are attached by soldering after the silver plating In the earlier grinding in of the quartz a frequency change to 3 x 10 ~ 1 and by tying with silk rope up to 3 x 10 ~ "'was brought about Inventive holder should therefore be omitted cutting, binding and polishing, so that the quartz can vibrate freely, because just leaving the boundary conditions leads to a pure free oscillation, which is the most stable, while every change in the boundary condition also changes the Schwingungsforin has the consequence, which in each case results in a forced, but not a purely free oscillation; also i The aim is to replace the previously common silk ropes with a flexible bond. It is already known to store quartz on quartz in such holders, to be precise using quartz of an amorphous nature; It is also known to use yarn threads for tying, which, however, may tend to change constantly. H. Storage rod-shaped, crystalline quartz, where quartz is supported by quartz, consists, according to the invention, essentially of the combination of some known features, namely because (, i the electrical axis of the quartz, which serves as the carrier, is horizontal, the neutral axis perpendicular and the optical axis parallel to the rod axis, i.e. the axis of the carrier quartz, which in turn runs parallel to the rod axis of the quartz, the original, unprocessed rod shape is retained unchanged for the greatest stability and the bond with very fine, Synthetic fiber threads known per se, but in particular unchanging, are carried out with additional tensioning by spring clips the boundary conditions are stabilized An embodiment of the invention is shown schematically. It shows Fig. 1 the orientation in the axes x, y, 2, Fig. 2 a longitudinal view of the mounting arrangement, Fig. 3 the arrangement of the electrodes and Fig. 4 a cross-section to Figs. 1 to 3 enlarged. In the representation of the orientation in Fig. 1, χ is the electrical, y the neutral and 2 the optical axis. The carrier crystal 1 is provided by brass bridges 2 with bores 7 as a spacer carrier for the oscillating crystal 3. The electrodes 4 are provided above it and the excitation electrodes 5 are soldered below it. The power supply 6 is located in the carrier quartz 1. 8 The binding of the rough quartz crystal 3 takes place via the bores 7 in the bridge 2, between the bridge 2 and the quartz rod 3 around the rod circumference by means of the finest, flexible synthetic fiber material 8. According to To carry out this type of binding, spring clips 9 are used, which cause additional bracing; since the binding is first made by a loop layer 10 above the bridge 2, this forms the support for the quartz rod, which can thus vibrate completely freely. P Λ T E N T A N S P H 0 C H E: 1. Holder for clock crystals in the form of rod oscillators, ie rod-shaped crystalline quartz carriers, with quartz mounted on quartz, characterized in that the electrical axis (.r) is horizontal, the neutral axis (_y) is perpendicular and the optical axis (2) is parallel to the rod axis, that is the axis of the carrier quartz, the originally unprocessed rod shape (3) is retained unchanged for the greatest stability and here the binding with very fine, known, but in particular unchanging synthetic fiber threads (8) with additional tension Spring clip (10). 2. Holder according to claim 1, characterized in that that the quartz body is etched before its use in such a way that a natural one rough surface is created, which allows thread fastening without cutting, and the boundary conditions are stabilized. Referred publications:
German Patent No. 490579;
Swiss patents No. 243 726, 216 054; Journal for High Frequency Technology, Vol. 35, 1930, p. 168. 1 sheet of drawings 509 554/225 9.55