DE3201053A1 - CLOCK WITH SHORT-TIME ALARM - Google Patents

Description

The invention relates to a short-term signaling device for a watch with an hour and minute hand and one with a source of tension connected signal circuit.

Such short-term signaling devices are known, for example, in chemical laboratories or in the household, where they are used for monitoring serve for processes whose duration is in the range from a few minutes to an hour.

According to the current state of the art, these short-term signal facilities partly installed together with a clock in one case or completely separately in its own case. In both In cases, however, such a short-term signaling device has its own clockwork including pointer and the associated drive, which often consists of a Clockspring is made. The disadvantage of a separate short-term signaling device with the simultaneous presence of a clock lies in that higher effort for two drives, and the associated larger space requirement and compared to an electrically operated one Clock generally greater inaccuracy of a mechanical

Eo powered short-term signaling device. Separate short-term signaling devices In addition to their relatively low accuracy, they also have the disadvantage that they cannot display the time.

It was therefore an object of the invention to provide a short-term signal device which is built into a watch and uses the generally much more accurate movement of this watch to measure time.

This object is achieved with the means mentioned in the characterizing part of claim 1.
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The advantages of the invention are the lower manufacturing costs, in the smaller space requirement and the higher accuracy of the short-term signal device according to the invention. Advantageous further training can be found in the subclaims.

Below are two exemplary embodiments of the invention based on the Fig. 1 and 2 described. Show it:

Fig. 1 is a longitudinal section through the pointer axis of the invention Containing clock, only the essential components for understanding the invention are shown. The clockwise direction is determined by the fact that the pointer shown on the left initially moves into the plane of the drawing.

Fig. 2 is a detailed drawing of the adjustment button (2) of the Fig. 1.

The construction of the clock containing the invention corresponds in almost all respects to the construction of a wall clock used, for example, in the household, only the second hand is omitted, while various contacting devices are also available.

An electrically conductive one, angled 90 ° at its end Signal pointer (31) is on a likewise electrically conductive adjustment knob (2) attached. The adjustment knob (2) is on the one hand in a cover glass (7) and on the other hand via a hole (3) on a electrically conductive central axis (32) mounted. Through one in the hole (3) of the adjustment button (2) existing electrically conductive There are four spiral springs (4) in the cylindrical shaft of the adjustment knob (2) protruding hooks (5) pressed against the cover glass (7). The resulting friction prevents that the signal pointer (31) due to gravity or as a result of vibrations and the like result from the means of the Adjustment button (2) set position removed. By pressing a pen (1) can be adjusted with the help of a button in the adjustment knob (2) also contained, not shown mechanism, the four hooks (5) in slots, also not shown, of the cylindrical Move the shaft of the adjustment button (2) back so far that this can be moved upwards under the influence of the spiral spring (4) or by pulling it. The adjustment button (2) can move as far as possible move upwards until a clamping ring (6) seated in a groove on its shaft touches the cover glass (7).

The end of the central axis opposite the adjustment button (2) (32) is connected to a terminal of a signal circuit (11) via a sliding contact (8) so that the signal pointer (31) with this connection is in constant electrical contact.

The central axis (32) is in the minute tube that surrounds it concentrically (42) stored, which consists of an electrically non-conductive material. At the bottom of the minute tube (42) is a so-called minute wheel (43) attached, over which the upper The minute hand (41) attached to the end of the minute tube (42) is driven. The minute hand (41) consists of electric conductive material and has a sliding contact (44), which is also electrically conductive, concentrically attached hour tube (52) contacted. The hour tube (52) also serves here as a storage, in this case for the minute tube (42) and is itself stored in the dial (12). Analogous to the minute wheel (43), there is a so-called, electrically conductive hour wheel on the hour tube (52) (53) attached, via which the hour hand (51), which is also attached to the hour tube (52), is driven.

Another sliding contact (9) touching the hour wheel (53) is connected to the positive pole of a DC voltage source (lo), whose positive pole is connected to the signal circuit (11).

In the event that the minute hand (41) does not control the signal hand (31) touched, the circuit connected to the signal circuit (11) is not closed. But as soon as due to the progress of the minute hand (41) such a contact occurs, this circuit is closed and the signal circuit (11) triggers a signal tone, e.g. a buzzer or a bell. The acoustic signal can be switched off in various ways, e.g. by using one here time limiter circuit, not shown, or by pulling it up of the signal pointer (31) after pressing the adjustment button (2) attached pin (1), causing the angled end of the signal pointer (31) outside of the line drawn by the minute hand (41)

Intervention level reaches and thus the contact is interrupted. in the in general, both of the aforementioned options are used Beep interruption can be provided at the same time.

With the help of the present invention, starting from any position of the minute hand (41) and hour hand (51), within a period of sixty minutes by setting the signal pointer (31) accordingly an alarm signal can be set for any time. In order to be able to use the time range of a full hour, that is Angled end of the drag pointer (31) on the side facing the viewer of FIG. 1 with an electrically insulating coating Mistake. This means that even if the drag pointer (31) is advanced by sixty minutes, in spite of its contact with the Minute hand (41) no alarm triggered.

A second embodiment, the structure of which corresponds to the characteristic Part of claim 3 corresponds, differs from the aforementioned embodiment only in the following differences:

The minute tube (42) does not exist entirely, but only on his Inside made of electrically insulating material, while its outside consists of an electrically conductive coating, the sliding contact In this embodiment, (9) does not touch the hour wheel (53) but the electrically conductive minute wheel (43), the sliding contact (44) is omitted. In this case too, when the drag pointer (31) is touched by the minute hand (41), the on the signal circuit (11) applied circuit is closed again, so that here, as in the aforementioned embodiment, a Beep occurs.

Claims (8)

Patent claims : Short-term signal device for a clock with an hour and minute hand and a signal circuit connected to a voltage source, characterized in that a signal pointer (31) adjustable by means of an adjustment button (2) is provided, its opposite to the minute hand (41) in Clockwise advance considered defines the duration of a short-term interval, at the end of which the minute hand (41) and signal pointer (31) overlap and a signal is emitted from the signal circuit (11). 2. Short-time signal device of claim!, Characterized in that the signal indicator (31) is electrically conductive and is connected to a, one terminal of the signal circuit (11) contacting, electrically conductive center axis (32), in that the minute hand (41) is electrically conductive and has a sliding contact (44) which contacts the electrically conductive hour tube (52) that the hour tube (52) via the electrically conductive hour wheel (53) connected to it and via the voltage source (lo) with the other terminal of the Signal circuit (11) is electrically connected, and that the minute tube (42) connected to the minute hand (41) and leading to the minute wheel (43) consists of electrically insulating material, with the central axis (32), minute tube (42) and hour tube (52) are arranged concentrically to one another. 3. Short-term signaling device according to claim 1, characterized in that the signal pointer (31) is electrically conductive and is connected to one terminal of the signal circuit (11) contacting, electrically conductive central axis (32), and that the minute hand ( 41) is electrically conductive, while with the concentric arrangement of the central axis (32), minute tube (42) and hour tube (52), the minute tube (42) is insulated on the inside and provided with an electrically conductive coating on the outside, which is supplied via the voltage source (lo) is connected to the other terminal of the signal circuit (11). 4. Short-term signaling device according to claim 2, characterized in that the connection of the signal circuit (11) with the central axis (32) and the hour wheel (53) takes place via sliding contacts (8, 9). 5. Short-term signal device according to claim 3, characterized in that the connection of the signal circuit (11) with the central axis (32) and the minute wheel (43) takes place via sliding contacts (8, 9). 6. Short-term signaling device according to claims 2 or 3, characterized in that the central axis (32) consists of the second axis of the clock. 7. Short-term signaling device according to claims 2 or 3, characterized in that the signal pointer (31) is designed as a drag pointer and via the electrically conductive adjustment button (2) mounted in the cover glass (?) Of the clock and the likewise electrically conductive spring ( 4) the central axis (32) contacted. 8. Short-term signal device according to claim 7, characterized in that the spring (4) is provided for additional friction generation.