DE7312470U - Self-cleaning device for contacts of counters - Google Patents

Description

The innovation relates to a self-cleaning device for contacts of counters, 'which are operated by pawls and whose display is electrically sensed, with at least one
The pawl acts on at least one counting roller of a plurality of rollers and each counting roller is connected to an electrical switching roller via a pinion.

Counters operated by pawls,
usually have several rollers, each of which displays, for example, the minutes-units, minute-tens, hours-units, hours-tens, days, months or even years as required. Included

63 ^ 6/1 l / UO / gn '" ^: ~ ^: 2 *« * April 2, 1973

the individual rollers are coupled to one another in a known manner.

For electrical "reading" of the counter display, there is generally a second disk for each counting drum or roller provided, which carries electrical contact springs, and on which the movement of the counting roller is transmitted by a pinion. The contact springs drag over the contact fields associated contact plate.

The functionality of the electrical reading in such counters is, however, impaired by that some contacts are made only very rarely, for example once a month or a year will. In the meantime, they can corrode or become clogged with dirt. So can Form an insulation layer which, despite mechanical contact, interrupts the flow of current or which is impermissible has high contact resistance.

The task of the present innovation is to ensure that the contact surfaces of seldom actuated contacts are kept free of corrosion and dirt, so that these are always flawless Give contact closure.

The innovation finds the solution to this problem in the fact that a shaft that supports the pinion in common is mounted in a lever that is held by the pawl carrier

6346 / ll / UO / gn - 3 "- April 2, 1973

arm at each - stop moving a small amount of angle is rotated from its normal position.

The drawing shows schematically a side view of an embodiment of the innovation.

The latch arm 1 is operated, for example once every minute, illustrating a first counting roller case by one counting unit further "The thus induced rotary motion of the counting roller 2 is transmitted through the pinion 3 on a further electrical shift drum or disk k. Contact springs 5 are attached to this, the ends 6 of which are bent upwards from the plane of the drawing. In this way you touch contact fields of a contact plate (not shown). In this way it is achieved that the display of the roller 3 corresponds to a specific position of the contact spring ends 6 on the contact plate and can thus be read electrically.

The described arrangement is in a known manner with similar devices for example for the tens of minutes, Hours, days, months, etc. coupled.

The idea behind the innovation is to keep all contacts, regardless of whether they are every minute or not only be advanced every year, to have a small forced movement carried out at short intervals. The ends of the contact springs that are no longer

63 ^ 6/11 / UO / gn ** ^{: L} * »J April 2, 1973

are to be placed, remain within the same contact field during this forced movement the contact plate.

For this purpose, the pawl arm 1 that is actuated most frequently has a, for example, circular disk 7i which is eccentric to the axis of rotation 12 of pawl arm 1 and roller 2. This disk 7 is firmly connected to the pawl 1 and is received by the U-shaped recess 8 of a fork-shaped lever 9. The fork-shaped lever 9 is pivotably mounted on the axis 13 of the roller or disk h. It has an elongated hole 10 approximately in the middle for receiving the axis 11, which belongs to all pinions 3 of the entire time counter.

However, the various pinions 3 are not firmly connected to this axis, so that they are independent are rotatable from each other.

Since both the axis 12 of the roller 2 and the axis 13 of the roller i> the disk k are held in a suitable manner, the axis 11 of the intermediate wheels 3, however, is carried by the fork-shaped part 3, when the pawl 1 is actuated, it runs in addition to the transmission the rotation of the roller 2 ϊ- the following sequence of movements:

If you press the pawl 1 into the position shown in dashed lines, the circular disc becomes

6346/1 l / Üo / gn "··"^; - ^: 5 ".r ^: April 2, 1973

brought into the position shown accordingly.

It swivels the fork-shaped lever 9 et " what about the axis 13. Since the axis 11 carried along

all pinions 3 turn around a small ί

Angle. This rotary movement is applied to all other j

Transfer rolls or disks 4 of the counter. ;

The counters not operated by the ratchets rollers 2 are locked in their position by holding pawls.

All Kontaktfoderenden 6 thereby lead a small movement off. When resetting the pawl 1, the same sequence of movements goes in the opposite direction in front of you.

Preferably, a lever 9 is provided on both sides of the roller sets 2, k , which support the axis II between them.

• This ensures that the contact surfaces are kept free of deposits and corrosion will. Even very rarely used contacts are real when they are needed operational.

- 6 - Claims

Claims (1)

I · "*"'ί": · ········· ί ι
I. öSW / ll / UO / gn - 6 ^# - April 2, 1973 EXPECTATIONS 1 # Self-cleaning device for contacts from i Counters operated by KlinRen and whose display is electrically sensed, • with at least one pawl on at least a counting roller of a plurality of rollers acts and each counting roller has a pinion with a electrical shift drum is connected, there characterized in that a the pinion / bearing shaft in a lever ge is stored, that of the pawl carrier arm with each Switching movement by a small angular amount is rotated from its normal position. 2. Self-cleaning device according to claim 1, characterized in that the ratchet arm (l) comprises a washer (7), which is eccentric on the axis (12) of the arm • (l) is seated and when the arm (l) is actuated ei NEN fork-shaped lever (9) pivots, the the axis (11) for the independent of one another the rotatable pinion (3) is supported. 3. Self-cleaning device according to claim 1 and / or claim 2, characterized draws that the fork-shaped lever (9) around the axis (13) of the electrical switching roller or disk (4) is pivotable. - 7 -
7312470-5.7.73 6346/11 / üO / gn "- * 7 '-"' April 2, 1973 Self-cleaning device according to one or several of claims 1 to 3, characterized in that the fork-shaped Part (9) approximately in the middle an elongated hole (10) for receiving the axis (11) for the pinion (3). Self-cleaning device according to one or more of Claims 1 to Ί, characterized in that it is characterizes η et that the fork-shaped part (9) on its adjacent to the ratchet arm (l) End, has a U-shaped recess (8) for receiving the disc (7). 6. Self-cleaning device after one or several of claims 1 to 5, characterized g e f.-. indicates that the disc (7) is circular. 7 · Sol self-cleaning device according to one or more of claims 1 to 6, characterized in that g β t- indicates that washer (7) and f »The latch arm (l) consist of one piece. 8. Self-cleaning device according to one or more of claims 1 to 7 »characterized in that the latch arm (l), which includes the disc (7), is the pawl for the minute units.