The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 24, 1981
Filed:
May. 12, 1980
Applicant:
Inventor:
Stephen P Johnston, Detroit Lakes, MN (US);
Assignee:
S. J. Electro Systems, Inc., Detroit Lakes, MN (US);
Primary Examiner:
Int. Cl.
CPC ...
H01H / ;
U.S. Cl.
CPC ...
200 / ; 2001 / ; 200 6152 ; 200230 ;
Abstract
Apparatus for increasing the effective differential of a position responsive switch (30) which comprises a mounting plate (43) having an aperture larger than the switch, and stop members (46, 47) carried by the switch for limiting the 'tumbling' motion of the switch in the aperture. A second embodiment interposes an intermediate mounting member (56) between the switch (30) and the mounting plate (55), and enables tumbling motion between the switch and the intermediate member as well as between the intermediate member and the mounting plate. The apparatus is shown in a float (29) for use for 'pump down' and 'pump up' operation.