EP0352644B2 - Programme carrier for an electric time switch - Google Patents

Description

• a) aus einem stabförmigen Flachkantstück mit als Anschlag dienendem L-Ansatz und einem parallel dazu mittels eines bogenförmigen Verbindungsstücks angeformten, schwächeren und gegebenenfalls kürzeren Ausleger zu einem U-förmigen Teil vereint,
• b) in der Zahl der Zeitstufen - formentsprechend geschlossen gruppiert und geordnet zu einem Ring zusammengefaßt - jeweils nebeneinander in eine von vorbestimmbaren Längslagen einzeln zwischen zwei einstückigen Teilen des Profilträgers in einem einstückigen Ringkörper das heißt einem rotations-symmetrischen Formkörper mit kreisförmiger Ausnehmung und axialem Innenprofil verschiebbar gebettet,
• c) und ausschließlich durch die Verbindung des Profilträgers mit einem konzentrischen rohrförmigen Paßstück mit hierzu kompatiblem axialem Außenprofil durch Befestigungs-Elemente mit Schnappnasen gehalten und gegen Herausfallen gesichert sind.

The invention relates to a program carrier for an electrical time switch, which serves as an annular profile carrier for the drive by a clockwork-driven shaft via a ring gear with a pinion or a conventional gear, and in turn by sensing its circumference - optionally by means of a lever device and / or one Cam - causes a switch of the time switch to be switched from one operating state (e.g. ON) to another (e.g. OFF),
with in particular close to the circumference of the program carrier with a radial zone and grooves and / or recesses and / or openings which are arranged radially therein,
as well as with switching elements that are captive between a rest and at least one working position, axially parallel or radially displaceable, the number of which is equal to the number of selectable time stages for a switching program that is periodic in accordance with the circulation of the program carrier, further with latching means and stops corresponding to the operating states to be brought about the switch necessary displacement positions of the switching elements, the switching elements

• a) made up of a rod-shaped flat edge piece with an L-neck serving as a stop and a weaker and possibly shorter arm formed in parallel by means of an arcuate connecting piece to form a U-shaped part,
• b) in the number of time stages - grouped in a closed form and arranged in a ring - each next to each other in one of predeterminable longitudinal positions individually between two integral parts of the profile carrier in a one-piece ring body, that is, one rotationally symmetrical molded body with circular recess and axial inner profile, slidably embedded,
• c) and are held only by the connection of the profile carrier with a concentric tubular fitting with a compatible axial outer profile by fastening elements with snap lugs and secured against falling out.

In DE-PS 30 19 325 an electrical time switch is described, which already enables a spatial density of the switching elements with a considerably reduced space requirement compared to the state of the art at the time, with the securing of the switching elements against loss, a clear overview of the selected program and high operational reliability are guaranteed.

From DE-A-2 325 553 a timer of the type mentioned is known, which has a one-piece switching disk with two guide disks, which are firmly connected to each other via a hub. This time switch proves disadvantageous in that the two guide disks cannot be fixed in any position relative to one another, so that an adjustment in the direction of rotation is necessary. This complicates automated manufacturing.

The present invention is based on the problem of creating a program carrier for an electrical time switch, in which an adjustment in the direction of rotation is not necessary and which enables automated production.

This object is achieved with an object of the preamble of claim 1 in conjunction with the use of the features of the characterizing part of claim 1, wherein the Claims 2 and 3 for an application of this basic principle of the invention describe two different embodiments. The advantage of the program carrier according to the invention over the prior art is based on the two-part switching disc, which consists of an annular body serving as a lower part and a concentric fitting piece provided with snap noses, the annular body and fitting piece being joined together. Because the lower part has a smooth surface, the upper part can be snapped onto the lower part equipped with switching elements in any position without adjustment. So no adjustment in the direction of rotation is necessary. This enables automated production.

• Fig.1: ein Schaltelement zur Verwendung bei einem ersten Ausführungsbeispiel der vorwiegend axialen bzw. der zwar nicht explizit beschriebenen, jedoch gegebenenfalls ebenfalls anwendbaren radialen Verschiebung in üblichen radial angeordneten Nuten einer radialen Zone des ringförmigen Profilträgers, in Normalausführung (a), in einer ersten Alternative (a′) und in einer zweiten Alternative (a˝), im einzelnen:
  • a) (bzw. a′, a˝) in Seitenansicht mit Flachkantstück (1) Ausleger (4), L-Ansatz (3), Längsnut (8) und Nocken (12)
  • b) in Frontansicht
  • c) in Unteransicht (mit Alternativen c, c˝ bzw. c′)
  • d) in Draufsicht (mit Alternativen d, d′ bzw. d˝)
• Fig.2: in Gegenüberstellung der beiden Ausführungen des Schaltelements für abwechselnde Gruppierung von zwei Schaltelementen in jeweils einer Nut des ringförmigen Profilträgers, wobei jeweils
  • .. a) die Seitenansicht
  • .. b) die Frontansicht
  • .. c) die Unteransicht
  • .. d) die Draufsicht

bedeuten und die spiegelbildliche Aufteilung in den Beispielen der Fig.2a (d) für die axiale Verschiebung und im Beispiel der Fig.2c (b) die radiale Verschiebung wiedergeben;

• Fig.3: den Ringkörper, das Unterteil des Programmträgers,
  • a) in der Frontansicht
  • b) im Schnitt
• Fig.4: das rohrförmige Paßstück (41), dh. das Oberteil (39) des Programmträgers, und Befestigungselemente mit Schnappnasen (43) (zu Fig.3)
  • a) in Frontansicht
  • b) im Schnitt
  • c) in Draufsicht
• Fig.5:
  • a) die Frontansicht des teilweise bestückten Ringkörpers (21)(Ausschnitt)
  • b) die Komplettansicht des bestückten Programmträgers (als Ausschnitt) mit ein- bzw. ausgeschobenen Schaltelementen (46 bzw. 47);
    zu Fig.3 und 4
• Fig.6: ähnlich einer Explosions-Zeichnung der Bestandteile des Programmträgers der ersten Variante für axiale Verschiebung in verschiedenen Zusammenbaustufen bzw. Betätigungszuständen (als Ausschnitt), wie in der Beschreibung erläutert;
• Fig.7: eine zweite Variante des Programmträgers mit radial verschiebbaren Schaltelementen
  • a) in Frontansicht auf einen Ausschnitt des teilweise bestückten Unterteils
  • b) Schnitt durch den kompletten Programmträger mit Unterteil (61), Oberteil (62) (links phantomartig dargestellt) und einem Schaltelement (63)
• Fig.8: eine zweite Variante des Programmträgers mit radialer Verschiebung der Schaltelemente ähnlich einer Explosionszeichnung die Einzelteile, ihre verschiedenen Zusammenbaustufen bzw. Betätigungszustände bei zwei Lagen des Schaltelements, wie in der Beschreibung erläutert;

Further embodiments of the invention are the subject of the dependent claims. Exemplary embodiments are explained in the following description with reference to the drawing; it represents:

• 1: a switching element for use in a first exemplary embodiment of the predominantly axial or, although not explicitly described, but possibly also applicable radial displacement in the usual radially arranged grooves of a radial zone of the annular profile carrier, in Standard version (a), in a first alternative (a ′) and in a second alternative (a˝), in detail:
  • a) (or a ′, a˝) in side view with flat edge piece (1) bracket (4), L-neck (3), longitudinal groove (8) and cam (12)
  • b) in front view
  • c) in bottom view (with alternatives c, c˝ or c ′)
  • d) in top view (with alternatives d, d ′ or d˝)
• Fig.2: in comparison of the two versions of the switching element for alternating grouping of two switching elements in a groove of the annular profile carrier, respectively
  • .. a) the side view
  • .. b) the front view
  • .. c) the bottom view
  • .. d) the top view

mean and reflect the mirror-image division in the examples of FIG. 2a (d) for the axial displacement and in the example of FIG. 2a (b) the radial displacement;

• 3: the ring body, the lower part of the program carrier,
  • a) in the front view
  • b) on average
• Fig.4: the tubular fitting ( 41 ), ie. the upper part (39) of the program carrier, and fastening elements with snap lugs (43) (for Fig. 3)
  • a) in front view
  • b) on average
  • c) in top view
• Fig. 5:
  • a) the front view of the partially equipped ring body ( 21 ) (detail)
  • b) the complete view of the loaded program carrier (as a section) with switching elements pushed in or out (46 or 47);
    to Fig. 3 and 4
• 6: Similar to an exploded drawing of the components of the program carrier of the first variant for axial displacement in different assembly stages or operating states (as a detail), as explained in the description;
• Fig. 7: a second variant of the program carrier with radially displaceable switching elements
  • a) in front view of a section of the partially equipped lower part
  • b) Section through the complete program carrier with lower part (61), upper part (62) (shown phantom-like on the left) and a switching element (63)
• 8: a second variant of the program carrier with radial displacement of the switching elements, similar to an exploded drawing, the individual parts, their various assembly stages or operating states with two positions of the switching element, as explained in the description;

In Fig.1 is shown on an enlarged scale, as the switching elements - from the base - as a rod-shaped flat edge piece 1 with a leg in the thickness given by the division of the selectable time steps 2 with an L-neck 3 in its plane and each a cantilever 4 parallel to the flat edge piece 1 as a second leg of reduced thickness 5 is constructed flush with an outer wall of the flat edge piece and are united by means of an arcuate connecting piece 6 to form a U-shaped switching element 7. The switching elements 7 can be displaced in one of their selectable positions in the longitudinal direction of their legs in the program carrier, as explained in more detail below, adapting to the particular characteristics of the variant in question according to the construction principle common to them.

In Fig.1 are a side view of a normal version (a), a first alternative thereof (a ') and a second alternative (a˝), in the front view, on the one hand (b) in section AA (see a) and uncut (b˝), in the bottom view on the cam 12 with certain differences in (c 'and c) or (c˝) and finally in the top view of the L-neck 3 in (d˝ in section and d) in normal - And alternative execution shown. The L-neck 3 is used in all versions as an actuating means of the switching element 7 and as a stop for limiting the displacement path in the outward direction.

The flat edge piece 1 has on the outside (top view) a longitudinal groove 8 with widening 9 at the connector-side end, also there in connection with special features of the respective alternative details, a taper 10, and a taper 11 of the connector 6, all for better insertion of the switching element in the associated groove of the ring body (21 in Fig. 3 and 73 in Fig.7).

The boom 4 has at its free end or between the L-neck 3 and the curve for the connector 6 a cam 12 with two opposite on the outside of the boom 4 there Inclination sections 13, 14 for latching the switching element 7 by snap action of an associated counter-cam ring (44 in Fig. 6 or 65 in Fig. 8) in the adapter ( 41 in Fig. 6 or 62 in Fig. 8). The normal version (a) of the switching element 7 is in an alternative 7 '(a') with a nozzle 15 in the extension of the boom 4 beyond the cam 12 or in another alternative 7˝ (a˝) with an extension 16 of the connecting piece 6 executed.

The features which are generally valid for the program carrier according to claim 1 can be transferred from the case of the axial displacement according to FIG. 1 - without the need for a specified, detailed description, to the case of the radial displacement, especially since those affected by the change in the type of displacement Details in connection with the peculiarities of claim 4 are discussed in detail. As shown in FIGS. 2a to d, there is a further improved embodiment, namely with the axial displacement (FIGS. 2a and b) or the radial displacement (FIGS. 2a and 2d) for equipping a groove with two switching elements each mirror image.

The individual views, the side view a), the front view b), the bottom view c) and the top view d) are in all cases, ie. the axial displacement in Fig.2a and 2b, or for radial displacement in Fig.2c and 2d with mutually matching letters. In the case of Figure 2a, some switching elements are shown in plan view d) as they are packed together in the grooves of the annular profile carrier 40 to be described later (when compared at right angles to the plane of the drawing of Figure 5a) or in the case of radial displacement of Fig.2c (b) inserted the corresponding arrangement in the grooves 73 of the annular profile carrier.

As has already been done in part, other corresponding reference numerals from FIG. 1 can also be adopted analogously to FIG. 2.

These mirror-image switching element halves are intended for combination in pairs in a common groove (22 in FIG. 3a or 73 in FIG. 7a), so that for the same number of switching elements only half the number of grooves 8 for guidance in the associated groove ring of the ring body 21 is required. For the longitudinal grooves 8 in the offset outer surface (outer surface) 17 (top view) of the flat edge piece 1, however, the full number of assigned webs 31 in a concentric section of the program carrier is required.

The variants of FIG. 1 can easily be transferred from the examples there to the examples of FIG. 2 that are specially designed in detail. The different peculiarities of the cases of these detailed examples in FIGS. 2a to d, as can be readily recognized, can be adapted in other respects without influencing the actual essence of the inventive features.

3 shows, as such, the lower part 20 of the program carrier in a first variant for the axial displacement direction of the switching elements a) in the front view and b) in section. The structure of the annular body 21 serving as the lower part 20 with the annular groove 22 can be seen. It is a pair of two cylinder connectors 23, 24 and a disk ring 25 as a connecting element with a molded ring of equidistant webs 30 on the outer wall 27 of the inner cylinder connector 24 and a likewise integrally molded ring of small bars 31 on the inside 29 of the outer cylinder connector 23 composed. Between the first-mentioned webs 30, the switching elements 7 are inserted with their flat edge pieces 1 in a snug sliding fit, the longitudinal grooves 8 of which on the outer surface 16 of the flat edge piece 1 also receive the small webs 31 on the inside 29 of the outer cylinder connection piece 23 in a sliding manner. The arrangement of the webs 30 as a ring on the outside 27 of the cylinder neck 24 on the one hand and the small bars 31 as a ring on the inside 29 of the outer cylinder neck 23 on the other hand are shown in their circular distribution on the circumference in FIG. 3a of the circular surface.

The lower part 20 of the program carrier thus has for the switching elements 7 the receiving function of an annular bed, in which the switching elements are grouped as a closed form and arranged into a ring - can be effortlessly inserted into the annular groove 22 from one side (from above onto the plane of the drawing) . The directions of displacement of the switching elements 7 are indicated by the arrow 32.

In the cross-sectional representation of the exemplary embodiment in FIG. 3b, the lower part 20 is drawn in with a toothed ring 33 for driving the program carrier about a shaft (not shown) with the axis 34. In the case of a drive, also not shown, with a conventional gear, this can be accommodated in the central recess 35.

4 shows in front a) and top view c) and in section b) as another section the upper part 39 of the program carrier, which as a fitting 41 with a concentric tube wall 42 with an axial outer profile compatible with the ring body 21 of FIG Fastening elements distributed over the circumference with snap lug 43 are clamped to the lower part (FIG. 3) and thus secure the switching elements 7 in the annular groove 22 after being fitted against falling out. One of the snap elements 43 can be seen in section and in the front view.

The tube wall is equipped with an integrally formed flange 45 and has a cam ring 44 which, with a counterpart (each switching element) as a locking means known per se, is shifted in the axial direction (parallel to the longitudinal direction of the flat edge piece 1 in FIG. 1) by snapping one of the two inclination surfaces of the cam ring 44 cooperates in the sense of locking one of the two displacement positions. When the adapter 41 is inserted into the interior of the annular body 21 serving as the lower part 20, the annular groove 22 is covered by the flange 45 after it has been completely equipped with the ring of switching elements 7 and the switching elements 7 are secured against falling out, but the L-lugs 3 remain accessible and visible for adjusting the switching element 7.

The interaction of lower part 20, switching element 7 and upper part 39 in the first variant - axial displaceability - can be understood in a supportive manner based on FIG. 5a, such that in different planes the outer cylinder neck 23 with the ring of small webs 31 and the inner cylinder neck 24 with the equidistant webs 30 on the one hand and partially equipped with switching elements 7 on the other hand are visible.

Together a left (FIG. 2a) and a right switching element 7 (FIG. 2a) are alternately accommodated in grooves 22 between the two webs 30; the webs 30 serve as a sliding guide for the switching elements. The flat edge pieces 1 slide mutually and take up the small webs 31 in their longitudinal groove 8. The outside of the L-lugs 3 of the switching elements 7 form a cylinder jacket. The direction of displacement has to be imagined at right angles on the drawing plane.

FIG. 5b shows this exemplary embodiment with the parts of the program carrier with the annular body 21 of FIG. 3 serving as lower part 20 and the fitting piece 41 (FIG. 4), equipped with (all) - left and right - switching elements 7 corresponding to the number the selectable time levels, partially inserted, e.g. 46, or pulled out, e.g. 47, which can be seen from the position of the L-neck 3. The inserted switching elements 47 give a clear view of the outer tube flange 45 of the fitting 41 serving as the upper part 39 of the program carrier.

The gear rim 33 for the drive and the remaining outer surface 49 of the outer cylinder socket 23 of the program carrier are visible on the opposite edge surface in the operational program carrier of this exemplary embodiment. This peripheral surface is expediently usable for the application of a time scale. Outside of this time scale (housing part 37 indicated broken), one has to imagine a fixed marking arrow 38 at a suitable point.

• a) das Paßstück 41 (Oberteil 39)
• b) ein Schaltelement b1) (7) bzw. b2) (7′)
• c) den Ringkörper 21 (Unterteil)
• d) den Ringkörper 21 des Programmträgers mit dem kompatibel konzentrischen Paßstück 41, unbestückt, dh. ohne Schaltelement
• e) mit eingeschobenem Schaltelement
• f) den Programmträger im bestücktem Zustand mit herausgezogenem Schaltelement

In addition to the reference numerals, hardly any explanations are required for FIG. 6, since the correlations result from the presentation in conjunction with the reference numerals and the legend listed above. The details can be found in the drawing of FIG. 6, similar to an exploded drawing, partly in section in the form of a top view.

• a) the fitting 41 (upper part 39)
• b) a switching element b1) (7) or b2) (7 ′)
• c) the ring body 21 (lower part)
• d) the ring body 21 of the program carrier with the compatible concentric fitting 41 , unequipped, that is. without switching element
• e) with inserted switching element
• f) the program carrier in the equipped state with the switching element pulled out

It should only be mentioned that in the example "e" the variant of the switching element of FIG. 1 'is used. In this case, scanning by means of a cam for actuating a switch, if necessary, via an intermediate lever and reading the switching position on the extension piece (15 in FIG. 1 ') is possible or provided in connection with suitable openings 36 in the flange 45.

7a shows a second variant of the program carrier with radial shifting of the switching elements. The structural principle is basically the same as that of FIG. 5 with an axial displacement of the switching elements and corresponds to that of the ring body of FIG. 3 serving as lower part 20, which has the function of a bed for the switching elements in a formally closed grouping and order to form a combined ring and the fitting 41 of Fig.4.

In Fig. 7b, the lower part 61 with strong lines in section, the fitting part serving as the upper part 48 in medium line width and the switching element 63 in the inserted position, also cut, but shown in weak line width, where, for reasons of better clarity, a drawing of individual parts together with a switching element - visible together - is selected in phantom.

In an equivalent manner, there is also a cam ring 65 in the form of a disk with rising and falling inclination surfaces 66, 67, with which the cam 12 of the switching elements 63, which are otherwise appropriately designed, cooperates - in accordance with the basic principle of FIG. 1. The direction of displacement of the switching elements is indicated by arrow 64. The principle of the adapter 62 and its shape also agree Except geometrical details (see Fig. 4) match those.

The phantom-like drawing of FIG. 7b, where the underside of the counter profiles of the ring body 61 are arranged vis-à-vis the underside profile of the cam ring 65 (or 12) for the arm 4 of the switching elements, also makes it easier to read these special features in connection with the ring body 61, the radial grooves 72 and the radial webs 73. Switching elements 63 are also visible in weak lines - in pairs and after removal of the fitting 62 used as the upper part 48. Switching elements are inserted 74 or pulled out 75 in the layers in FIG .

• a) das Oberteil 39 des Programmträgers mit dem Paßstück 62
• b) das Schaltelement 63
• c) das Unterteil 19 des Programmträgers mit dem Ringkörper 61
• d) den Ringkörper 61 mit Schaltelement in herausgezogener Stellung
• e) den Ringkörper 61 mit eingesetzem Paßstück 62
• f) den kompletten Programmträger bestehend aus Ringkörper 61, Paßstück 62 und Schaltelement 63 in eingeschobener Stellung.

8 shows - similarly to FIG. 6 - an overview of the parts of the program carrier with radial displacement of the switching elements and of the spatial assignment of the adapter and bed-like lower part of the program carrier alone (a), (c) and (e), with the ( d) and inserted (f) switching element 12, partly as a section:

• a) the upper part 39 of the program carrier with the adapter 62
• b) the switching element 63
• c) the lower part 19 of the program carrier with the ring body 61
• d) the ring body 61 with the switching element in the pulled-out position
• e) the ring body 61 with inserted fitting 62
• f) the complete program carrier consisting of ring body 61, fitting 62 and switching element 63 in the inserted position.

Claims (5)

1. A programme carrier for an electric time switch taking the form of a multi-part annular profiled carrier which is driven by a clockwork-driven shaft via a gear rim with a pinion or a conventional transmission and which by the sensing of its periphery, possibly by means of a lever device and/or a cam, moves a switch of the time switch out of one optional stage (e.g. ON) into another (e.g. OFF),
   which has, more particularly adjacent the periphery of the programme carrier, a radial zone formed with radially disposed grooves and/or recessess and/or openings,
   which has furthermore, disposed undetachably in said zones, switch elements which can be displaced axis-parallel and radially between an inoperative position and at least one working position,
   whose number is equal to the number of selectable time stages for a periodic switching programme corresponding to the rotation of the programme carrier,
   further having latching means and stops corresponding to the displacement positions of the switch elements required by the operational states of the switch to be produced,
   the switch elements

   a) comprising a rod-shaped flat-edged member (1), with an L-attachment (3) acting as a stop, and a weaker and possibly shorter extension arm (4) formed on the member (1) parallel therewith by means of an arcuate connecting member (6), are combined to a U-shaped part,

   b) in the same number as the time stages the switch elements, combined in a closed group of suitable shape and ordered in a ring, are embedded one beside the other in a one-piece annular member (21) - i.e., a rotation-symmetrical shaped member with a circular recess (35) and an axial inner profile, for displacement individually into one of the predeterminable longitudinal positions between two one-pice portions of the profiled carrier,

   c) the switch elements being retained and secured against dropping out exclusively by the connection of the profiled carrier via attaching elements having snap lugs (43) to a concentric tubular fitting piece (41, 62) of axial outer profile compatible therewith,

   characterised in that the switch elements in a total number as described above are distributed over the circumference of the ring in an inverted grouping and arrangement in such a manner that in each case two switch elements are inserted, according to Fig. 2a or Fig. 2b, respectively, alternately a so-called left (a: in Fig. 2a) and a so-called right (b: in Fig. 2b) switch element (for axial displacement; or, respectively, Fig. 2c and Fig. 2d for radial displacement), the thickness of the flat-edged members being in each case at least approximately as large as half the spacing of the grooves on the circumference of the totality of switch elements, and the thickness of the extension arms amounting to at least approximately one quarter of the spacing, and the weaker extension arm is alternately formed on the so-called left and the so-called right switch elements on the one (e.g. the left) side of the flat-edged member or, respectively, on the other e.g. the right) side so as to be flush, the surfaces of the flat-edged members, howver, are flush in one surface within the composed ring.
2. A programme carrier for an electric time switch according to claim 1, characterised in that in a first construction the annular member (21) acting as the bottom part (20) takes the form of a pair of rotation-symmetrical cylindrical members (23, 24) connected by a disc ring (25), thus forming an annular groove (22) for the ring formed by the grouped switch elements, and that the concentric fitting member (41), acting as the top part, has axially and symmetrically distributed snap lugs (43) for a matching adhesive fit with the annular member (21), so that in the annular groove (22) switch elements (7) are guided in the axial direction by the inner extension arm (4) and the outer arm (18) on one side between uniformly distributed, i.e. equidistant, webs on the outer wall (27) of the inner cylindrical member (24) and by means of narrow webs (31) on the inner wall (29) of the outer cylindrical member (23),
   the switch elements being retained in one of the two axially displaceable positions by a cam (44) in a central zone of the outer wall of the tubular fitting member (41) in operative connection to a matching cam (12) of opposite inclinations on the arm of the switch element acting as a latching means,
   and lastly an outer flange (45), provided on the tubular neck of the compatibly concentric fitting member (41) and having openings (35) for the extensions (15) of the switch elements (7), covers the switch elements, thus securing them in the assembled programme carrier against dropping out.
3. A programme carrier for an electric time switch according to claim 1, characterised in that in a second construction the annular member (21) acting as the bottom part (19) is constructed in the form of an annular disc having a hub (91) and a shoulder at the outer edge and is formed with grooves (72) and webs (73) distributed uniformly alternating concentrically for receiving the extension arms (4) of the switch elements, and also has in an additional inner annular depression (92) close to the hub of the annular disc a cam (65) which is operatively connected to a matching cam (12) of the switch element and acts as a latching means, to retain the switch element in one of the radially displaceable positions,
   and lastly the compatibly concentric fitting member (62) with a recess (65) in the tubular neck (93) has an outer tubular flange (94) which covers the flat-edged members (1) of the switch elements (13) and secures said switch elements in the assembled programme carrier aginst dropping out.
4. A programme carrier for an electric time switch according to claim 1, characterised in that in the surface adjacent the L-attachment (3) the flat-edged member (1) of the switch element is formed with a central longitudinal groove (8) which is associated with an equally narrow web (31) on the adjacent guide surface of the concentric fitting member, so that the number of the webs (31) is also equal to twice the number of time stages.
5. A programme carrier for an electric time switch according to one of claims 1 to 3, characterised in that at least one of its switch elements has an extension arm (4) having opposite to its cam (12) a prolongation (15) of equal width and thickness, and/or at least one of the connecting members (6) of the two members of the switch element has a prolongation (16) of the same width as the latter, for which purpose an opening (e.g. 45′) is provided in the associated flange (45) and the associated disc ring (25), respectively.

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