Electricity: circuit makers and breakers – Special application – Actuated concurrently with operation or use of art device
Patent
1992-03-27
1994-02-08
Scott, J. R.
Electricity: circuit makers and breakers
Special application
Actuated concurrently with operation or use of art device
200 6154, H01H 906
Patent
active
052850340
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a control lever having a knob and an elongated lever part which at its one end carries the knob and at some distance from said end is connected to a mechanism that is to be operated, the knob having an electrical switch.
More particularly, the present invention relates to that type of control lever which has a knob in which an electrical switch has been arranged, which can be actuated manually for changing between different positions of the switch. It is also known to arrange electrical switches in levers, for example a pushing switch which is actuated by hand for switching, for instance, an overdrive gear attached to a lever. For the operation of airplanes it is further known to arrange different types of switches in joy sticks.
U.S. Pat. No. 4,183,424 discloses a gear change lever having an elastically mounted knob. The knob includes a spring element positioned below the contact elements. The spring element is an elastic centering element which requires a very symmetrically manufactured knob and a portion of the lever in order to maintain a clearance between the contact elements in a non-activated position. In practice, the clearance must be disadvantageously large in order to secure a clearance, resulting in delayed contact function. For actuation of a clutch by means of a contact function in the knob of a gear change lever, it is of utmost importance that the activation takes place with a minimum delay after moving the knob for changing gear.
The object of the present invention is to obtain a lever by which a change of electrical condition of the electric switch is obtained automatically as early as possible during an operation.
SUMMARY OF THE INVENTION
The object of the invention is obtained by means of a lever according to the invention which is characterized in that the knob is somewhat movable in different directions radially relative to the shaft of the lever and includes a cavity into which the lever part protrudes with one of its end parts and that said cavity has a peripheral surface which defines a distance to the surface of said end part of the lever, that in said space an elastic, ring-shaped centering element is located which by means of one of its peripheries abuts against said peripheral surface of the space and with its second periphery abuts against said end part of the lever, and at least one ring-shaped movable, electrical contact element included in the switch which is connected to the knob and adapted to follow it in its radial movements, that said centering element strives at centering said contact element relative to said end part of the lever so that in a neutral position of the knob the movable contact element has a distance to said end part of the lever, which end part forms one contact element rigidly fastened in the knob, said contact element being part of the switch and that by a manual transverse movement of the knob relative to the lever in some of said different directions, the ring-shaped contact element is moved radially to one or more different contact positions in contact with the second contact element.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention shall be explained in detail below in connection with some embodiment examples with reference to the attached drawings, in which
FIG. 1 is a central, axial section through the lever according to the invention in a first embodiment example along the line I--I in FIG. 4,
FIG. 2 is a radial section through the device along the line II--II in FIG. 1,
FIG. 3 is a central, axial section through the device along the line III--III in FIG. 4,
FIG. 4 is a radial section through the device along the line IV--IV in FIG. 1,
FIG. 5 is a section, corresponding to the one in FIG. 2 but with the device in an activated position,
FIG. 6 is a section, corresponding to the section in FIG. 1 through the lever in a second embodiment example,
FIG. 7 is a section along the line VII--VII in FIG. 6,
FIG. 8 is a section, corresponding to the section in FIG. 6 through the lever in a
REFERENCES:
patent: 2732447 (1956-01-01), Findley
patent: 2813942 (1957-11-01), Binder
patent: 2945100 (1960-07-01), Maurice et al.
patent: 3268680 (1966-08-01), Anderson
patent: 3910388 (1975-10-01), Moori et al.
patent: 4144424 (1979-03-01), Takeda et al.
patent: 4158404 (1979-06-01), Yamashita et al.
patent: 4183424 (1980-01-01), Rumyantsev et al.
Skogward Kenneth
Stenevi Jan
Scandmec Mecania AB
Scott J. R.
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