摘要:
The pressure switch (1), constituted by a cylindrical body (2), comprises two portions (3, 4) which are interconnected; also, a first of the portions is connected to a micro-switch and the second to an inlet (8) for pressurise fluid delivery. A stem (11) is housed inside the cylindrical body (2) and oscillates alternatively between an inactive position, with the micro-switch deactivated, and an active position, with the micro-switch activated by pressing. Means for slowing a translation velocity of the stem (11) are included between the stem (11) and the inlet (8).
摘要:
Safety pressure switch (10) for domestic appliances, such as washing machines, dishwashers or suchlike, provided with a box-like element (11) inside which a membrane (12) is arranged that defines a first zone (18) connected to the environment to be controlled and a second zone (19) at atmospheric pressure. Actuators (13) cooperating with the membrane (12) are provided in the first zone (19). The actuators (13) comprise at least two pistons (32, 33) axially autonomous and have a total area of contact (17) with the membrane (12). The total area of contact (17) comprises at least a central area (22) and a peripheral area (23) defined by the upper surfaces of the corresponding pistons (32, 33). The pistons (32, 33) are moved by the membrane (12) in order to activate relative switches (20, 21).
摘要:
Es wird vorgeschlagen eine Anordnung (10) zum berührungslosen Schalten eines elektrischen Kontaktes (12) mittels einer eine vorbestimmte Schaltkraftschwelle übersteigenden Schaltkraft (17), mit einem Schaltglied (14), mittels dessen die Schaltkraft (17) ausgeübt wird, einer an einer Einspannstelle (C) einseitig eingespannten Blattfeder (38), wobei das Schaltglied (14) zum Schalten an der Blattfeder (38) angreift, um die Blattfeder (38) von einer Ruheposition in eine Schaltposition (48') zu bewegen, wobei die Blattfeder (38) in der Ruheposition so angeordnet ist, daß deren Federkraft (51) die vorbestimmte Schaltkraftschwelle bildet. Dabei sind Mittel (58; B) zur Veränderung der Lage (C 1 , C 2 ) der Einspannstelle (C) vorgesehen, so daß durch Veränderung der Lage (C 1 , C 2 ) der Einspannstelle (C) die Schaltkraftschwelle eingestellt werden kann (Fig. 1).
摘要:
A thermally actuated switching device (1), comprising a base body (2), a electric switch (10), means (3) for actuating the switch (10) as a function of a heat responsive device (6) adjustment means including an adjustment pin (9) for adjusting the switching threshold of the switching device (1), and a combination component (15) which is coupled to and rotates with the adjustment pin (9), and integrates a friction element (20,21,22,23) which under prestress interacts with the base body (2), in order to create a frictional resistance to the rotation, a clicking element (24) which engages with a rigid part (37) on the base body (2), and a rotational movement-limiting element (17), being all the parts (15,20-23,24,37) made of metal sheet.
摘要:
The present invention relates to a control thermostat for apparatus operating by thermal cycles. The thermostat comprises a box-like casing housing therein an expansible plenum chamber which is coupled, through a capillary element, to an expanding liquid holding probe. The plenum chamber, in particular, is arranged between an adjusting abutment element and a swinging lever operating on a resilient blade, made of an electrically conductive material, coupled to a first electric terminal and provided with a movable electric contact, which can be displaced by the movement of the resilient blade caused by the swinging lever, in order to close and/or open an electric circuit.
摘要:
A fluid pressure responsive electric switch (100) is shown in which first and second discrete electrical switches are controlled. A first movable support ring (122) mounts first and second snap acting discs (120a, 124a) on opposite sides thereof, the discs each having the normally concave surface facing the support ring. The first disc receives a force through a pressure to force converter (134) which is transferred through the second disc to a second movable support (126) and a third snap acting disc (128a) having a normally concave surface facing a related movable contact arm. When the system pressures exceeds a first minimum level the third disc (128a) snaps allowing a motion transfer pin to transfer a force to the movable contact arm (118a) of a compressor actuation switch (118) to energize the compressor. When system pressure increases to a second higher level the first disc (120c) snaps and transfers motion via a motion transfer pin (120c) to the movable arm (116a) of a fan actuation switch to energize the fan. If the system pressure increases to a third still higher level, the second disc (124a) snaps thereby allowing the spring bias of the movable arm (118a) of the compressor actuation switch to separate from the mating stationary contact to thereby de-energize the compressor. According to a second embodiment the switch (200) includes only the fan actuation and compressor high pressure cut-out functions by eliminating the third disc and by making the second support (130c') stationary.
摘要:
A first belleville spring, having a given preload, controls a translatable, elongate, contact disc assembly, to cause a shunting disc to remove from, and close into contact with a pair of circuit contacts. The assembly is disposed within a translatable carriage, and a second belleville spring having a greater preload controls translation of the carriage, to cause the shunting disc to close into contact with, and remove from, a second pair of circuit contacts. As a consequence dual set points of switching operation is provided. A fluid medium, admitted into a housing for the assembly and carriage, effects translation of the assembly and carriage.