Method of and apparatus for holding against mispositioning a the

Details Method of and apparatus for holding against mispositioning a the Method of and apparatus for holding against mispositioning a the

1982-02-18

1985-06-04

Paschall, M. H.

Electric heating

Metal heating

Cutting or disintegrating

219 69M, 219 69R, 51356, B23P 108

Patent

active

045216614

ABSTRACT:
A work element supported by a thermally deflectable member in an operating machine tool is held against mispositioning by causing a fluid to flow through a passage formed in the member of the machine tool performing a machining operation to hold the member in a heat-exchanging relationship with the fluid and maintaining the difference in temperature between the fluid flowing into the passage of the member and the fluid flowing out of that passage substantially constant. Two thermistors are used to detect the temperatures of the flowing fluid at an inlet side and at an outlet side, respectively, and a signal representing a temperature difference detected is compared with a threshold value representing a preselected temperature difference to provide a deviation signal which is used to control the rate of flow of the fluid through the passage and/or the temperature of the flow-in fluid. Preferably, the latter is held constant and the former is controlled in response to the deviation or control signal.

REFERENCES:
patent: 3062104 (1962-11-01), Deflandre
patent: 3315892 (1967-04-01), Haake
patent: 3814892 (1974-06-01), Inoue
patent: 3946189 (1976-03-01), Pomella et al.
patent: 4125754 (1978-11-01), Wasserman et al.
patent: 4314143 (1982-02-01), Bilstad et al.
Popular Science--"Instant Hot Water Flows from Cold Water Pipe"--Jul. 1961, pp. 44-46.

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