Communications: electrical – Continuously variable indicating – With meter reading
Patent
1993-06-24
1995-09-12
Yusko, Donald J.
Communications: electrical
Continuously variable indicating
With meter reading
172 2, 172 3, 34082572, 34082577, A01B 6700, G08C 1914
Patent
active
054500680
ABSTRACT:
An infrared remote-controlled soil compacting device is controlled such that the device cannot be set into operation as long as the operator with the sending unit is within close vicinity of the soil compacting device so that an accidental operation or propelling in the wrong direction is prevented. This is achieved by providing an infrared close range radiation in addition to the infrared control radiation required for the operational control of the device. The close range radiation has a substantially reduced intensity relative to the control radiation so that the close range radiation can be received within the receiving unit only within close vicinity of the sending unit. When the close range radiation is received within the receiving unit the generation or release of electric signals affecting propelling of the soil compacting device is suppressed.
REFERENCES:
patent: 4057805 (1977-11-01), Dowling
patent: 4109186 (1978-08-01), Parque
patent: 4135144 (1979-01-01), Elmasian
patent: 4751396 (1988-06-01), Daigle et al.
patent: 4843384 (1989-06-01), Ide et al.
patent: 5193210 (1993-03-01), Nicholas et al.
Jung David Yink
Wacker Werke GmbH & Co. KG
Yusko Donald J.
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