Hand-held heating tool with improved heat control

Details Hand-held heating tool with improved heat control Hand-held heating tool with improved heat control

1995-08-23

1996-09-10

Jeffery, John A.

Electric heating

Heating devices

Tool or instrument

219492, 219509, H05B 102, H05B 300

Patent

active

055548385

ABSTRACT:
A hand-held groover for forming grooves, bevels, etc. in architectural insulation board comprises a resistive cutting blade, a 25 KHz. oscillator, operated by full-wave rectified line current and connected to the cutting blade through a light-weight transformer. The oscillator delivers to the heating element a sequence of electrical pulses synchronized with the line current frequency, each having a duration of 1/120 second. Each pulse consists of plural oscillations at 25 KHz., so that the heating current in the blade is essentially an amplitude-modulated 25 KHz. current. The modulating pulses are selected from the continuous train of 120 Hz. pulses by an adjustable triggering circuit, to adjust the time interval between pulses and thereby control the temperature of the heating element.

REFERENCES:
patent: 3373262 (1968-03-01), Howell
patent: 4527560 (1985-07-01), Masreliez
patent: 4604517 (1986-08-01), Barry
patent: 4660057 (1987-04-01), Watanabe et al.
patent: 4906901 (1990-03-01), Carroll
patent: 5270520 (1993-12-01), Barzilai et al.
patent: 5416300 (1995-05-01), Hickl et al.
patent: 5421943 (1995-06-01), Tam et al.
3 pgs. of literature describing Electronic Transformers of Hatch Transformers Inc. (date unknown).
1 sheet of drawing (undated) showing the Hatch circuit.
Wind-Lock Corporation Hot Groover Brochure (date unknown).

Affiliated with

Also associated with

Rating

Hand-held heating tool with improved heat control does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Hand-held heating tool with improved heat control, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hand-held heating tool with improved heat control will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1322470