DE3907873A1 - Arrangement for indicating the time - Google Patents

Abstract

For indicating the time in the case of analog timepieces, it has hitherto been necessary to use an hour hand and a minute hand, so that it is possible to read the time accurate to a minute. An arrangement having a vernier scale on the dial and a circumferential hour disc with openings for uncovering the minute marks makes it possible to read the time accurate to a minute and does not require a minute hand which is mechanically separate from the hour hand.

Description

The invention relates to the construction of an analog clock with the possibility of reading hours and minutes.

The given invention enables reading the minutes on the clock without a separate minute to use pointer.

So far it has always been one of an hour for analog clocks separate minute hand has been used, this is well known.

However, there is always a special mechanism necessary, especially the minute hand the axis of the hour hand. It is also used to drive the minute hand most of the energy of the watch is necessary because it is the highest Orbital velocity.

The invention is based, which To reduce the number of clock hands, especially omit the minute hand.

This object is achieved in that on the Dial vernier markings are attached, through a perforated disc, with the hour hand follows, be revealed and the position of a Minute hand.  

A preferred embodiment will follow explained below with reference to the drawing.

The display unit of the watch consists of a dial ( 5 ) with the hourly divisions usually arranged on watches. Inside the dial ( 13 ) there are 11 equidistant markings ( 2 ) on five circles. These markings have a width of 1/2 angular degree ( 6 ) and an angular offset of 6.5 angular degrees from the nearest inner marking circle ( 1 ).

The hour hand ( 12 ) now rotates with the hour hand on this dial. The period of the hour hand and thus the hour hand sheet is 12 hours. The hour hand sheet is not transparent, but has openings ( 9 ) that lie on five circles with the same radii as the markings on the dial. On each of the five circles ( 8 ) there are 12 equidistant openings with a width of half an angular degree and a displacement ( 11 ) of six angular degrees with respect to the nearest inner opening circle. By turning the hour hand sheet, new minute markings are now uncovered, strictly speaking, a new minute mark appears every 65.45 seconds, which results in a complete virtual circulation of the minute hand after one hour.

Claims (4)

1. Arrangement for displaying the time in hours and minutes by using an hour hand sheet and omitting the mechanical minute hand, characterized in that the dial ( 5 ) on five radii ( 1 ) each have eleven equidistant markings ( 2 ) with a width of 1 / 2 angular degrees ( 6 ) has that these markings are offset from radius to radius by 6.5 angular degrees ( 3 ), that the dial is covered by the hour hand sheet ( 7 ) in the area of the markings ( 4 ) that the hour hand sheet on five radii ( 8 ) each have twelve equidistant openings ( 9 ) with a width of 1/2 angular degree ( 10 ) that these openings are offset from radius to radius by six angular degrees ( 11 ) so that the hour hand ( 12 ) is on the hour hand sheet is applied that the first minute mark ( 13 ) on the clock face is uncovered by the hour hand at the full hour and thus by turning the hour hand to j The next mark is revealed every minute and the last is covered. 2. Arrangement according to claim 1, characterized in that the The dial is dark colored and the markings bright or luminous on the dark dial are led. 3. Arrangement according to claim 1, characterized in that the The dial is brightly colored and the markings are dark on the light dial. 4. Arrangement according to claim 1, characterized in that the arrangement of the five radii with the markings repeated outside several times.