Electric heating – Heating devices – Combined with diverse-type art device
Patent
1985-07-09
1988-04-12
Bartis, Anthony
Electric heating
Heating devices
Combined with diverse-type art device
1231425E, 219208, 219311, 219526, 219535, 219536, 219538, 2482065, F01M 502, F02N 1704, H05B 320
Patent
active
RE0326437
ABSTRACT:
A preheater unit magnetically attachable to the surface of the oil pan of an automobile engine includes an electric heating unit and a magnetic device situated within a rectilinear shell having an open side closed by a non-magnetic heat transfer plate. The heating unit is encased in the plate and surrounds the magnetic device. The magnetic device includes a permanent magnet disposed between two magnetic end portions situated to be operative in the same plane as the outer planar surface of the plate through parallel spaced apart openings in the plate for magnetically attaching the preheater unit to the surface of the oil pan. A temperature control switch within the shell maintains the heat transfer plate within predetermined temperature limits. To avoid problems caused by differences in the coefficients of expansion of the magnet and heat transfer plate, a magnet positioning member of non-magnetic material cooperates with the shell to hold the magnet in place while allowing room for the magnet to expand and contract.
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Abandoned Patent Application 06/375,365, filed 05/06/82 by inventors Bennett, Howe, Jaakola and Koutavas.
Bennett James W.
Howe Gary L.
Jaakola Kenneth A.
Koutavas Samuel G.
Bartis Anthony
Winland Electronics, Inc.
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