Thermoelectric thermometer of radio transmission type

• US 4,716,411 A
• Filed: 05/05/1986
• Issued: 12/29/1987
• Est. Priority Date: 05/05/1986
• Status: Expired due to Fees

• Current Assignee: Tokio Nakamura
• Original Assignee: Tokio Nakamura
• Inventors: Nakamura, Tokio
• Primary Examiner(s): Caldwell, Sr., John W.
• Assistant Examiner(s): Queen, Tyrone
• Application Number:
  US06/859,498
• Time in Patent Office: 603 Days
• Field of Search: 340/870.17, 340/870.11, 340/596, 340/593, 374/179, 374/182
• US Class Current: 340/870.17
• CPC Class Codes: G01K 1/024 for remote indication
• CPC Class Codes: G01K 13/10 for measuring temperature within piled or stacked materials by special arrangements for conducting heat from the object to the sensitive heat element G01K1/16

Abstract

A thermoelectric thermometer of the radio transmission type incorporating a thermocouple for measuring the temperature of an object having a relatively high temperature, such as metal in a molten state or being heat-treated. A signal representing the temperature measured is transmitted by radio waves and received at a desired location away from the hot object to remotely detect the temperature of the object.

Claims

1. A thermoelectric thermometer for measuring the temperature of a hot environment in the range of about 300°

C. to about 1300°

C., comprising, in combination;

(a) an elongated housing with a defined front, midportion and rear, a pointed nose section at the front;

(b) an elongated thermocouple (15) with a rear part extending from said nose section into said housing midportion;

(c) a transmitter (17) in said midportion coupled to said thermocouple rear part to receive a signal therefrom;

(d) a sinker (16) disposed between said thermocouple (15) and the transmitter (17), the weight of the sinker being such that it can sink the thermometer in an environment to be measured as to its temperature;

(e) an electric cell power supply (18) coupled to the transmitter to supply power thereto;

(f) a sharp-pointed protective cover (22) covering at least the front of the thermocouple, an insulator (24) disposed around the elongated thermocouple, a flange (20) disposed around the midportion to prevent the thermocouple'"'"'s transmitter (17) from sinking into the environment to be measured;

(g) amplifier means (4), analog-to-digital converter means (5) in the transmitter, to amplify the signal received from the thermocouple, with a first microprocessor (6) to convert the digital signal to a data signal; and

,

(h) receiver means located some distance away from the transmitter (17), said receiver means being adapted and disposed to receive a transmitted signal from the transmitter and said receiver means including a wave filter (11) to filter the transmitted signal, a second microprocessor (12) to decode the transmitted signal, with a recorder (14) and an indicator (13) to utilize the transmitted signal.