Electric heating – Heating devices – With current connection and/or disconnection means
Patent
1980-03-19
1982-05-04
Reynolds, B. A.
Electric heating
Heating devices
With current connection and/or disconnection means
219417, 337182, 337183, 337407, 361104, 222146HE, H05B 102
Patent
active
043283870
ABSTRACT:
A fail-safe thermostatically controlled circuit is disclosed for use in high-throughput thermoplastic material melting and dispensing apparatus including a hopper into which solid thermoplastic material is deposited for feeding the thermoplastic material to a grid melter which melts the thermoplastic material whereupon the molten thermoplastic material flows from the grid melter to a reservoir from which the molten thermoplastic material is pumped to an applicator or dispenser. Both the grid melter and the reservoir are preferably heated by electrical resistance heaters energized by separate fail-safe thermostatically controlled circuits. Each fail-safe thermostatically controlled circuit includes a manually adjustable thermostat for sensing the temperature of the molten thermoplastic material in order to connect a high voltage and current power source through a fusible element included in fail-safe circuitry to the electrical resistance heaters for energizing the electrical resistance heaters when the temperature of the molten thermoplastic material is below a preselected thermostat temperature setting. The fail-safe circuitry also includes a shut-off temperature detector for sensing the temperature of the molten thermoplastic material in order to energize a heat generating element for melting the fusible element if the temperature of the molten thermoplastic material reaches a predetermined shut-off temperature which is above the preselected thermostat temperature setting, thereby disconnecting the power source from the electrical resistance heaters.
REFERENCES:
patent: Re28822 (1976-05-01), Fritts
patent: 1528053 (1925-03-01), Hands
patent: 1966466 (1934-07-01), Smalley
patent: 2223729 (1940-12-01), Kleindienst et al.
patent: 3277276 (1966-10-01), Nichol et al.
patent: 3377466 (1968-04-01), Paulsen
patent: 3531023 (1970-09-01), Mercer
patent: 3548156 (1970-12-01), Davey
patent: 3708652 (1973-01-01), Salway-Waller
patent: 3792801 (1974-02-01), Baker et al.
patent: 3981416 (1976-09-01), Scholl
patent: 4075678 (1978-02-01), Levinn
Nordson Corporation
Reynolds B. A.
Roskoski Bernard
LandOfFree
Fail-safe thermostatically controlled circuit for use in apparat does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fail-safe thermostatically controlled circuit for use in apparat, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fail-safe thermostatically controlled circuit for use in apparat will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-882868