Portable instrument for recording electrical load current and operating duration
AssigneeBethlehem Steel Corporation
InventorEdwin K. Ziegenfuss
Life of this patent
Estimating the term…
Abstract
Self-contained portable recording instrument is particularly useful at field sites for recording the magnitude of both welding current and operating duration. A second embodiment is adapted to record the magnitude of welding current, voltage and operating duration. Strip chart records provide analysts with means for determining operator incentive pay when working on field assignments. Records enable determining the quality and duration of actual welds, as well as the occurrence of operator-simulated welding time.
Claims20
Portable apparatus for recording electrical load current and operating duration, comprising:
- a. a portable housing adapted to accommodate elements of said apparatus,
- b. means operatively associated with said electrical load for producing separate load current and operating duration signals,
- c. means for recording said load current signal and including a record drive movable only under control of said operating duration signal, and
- d. a source within said housing for powering said recorder record driver.
Portable apparatus for recording electrical load current and operating duration, comprising:
- a. a portable housing adapted to accommodate elements of said apparatus,
- b. input and output circuit connectors adapted to be connected to a load current source and said load, respectively,
- c. means operatively associated with said input and output connectors for producing a load current signal,
- d. means operatively associated with means (c) for producing an operating duration signal,
- e. means for recording said load current signal and including a record drive movable only under control of said operating duration signal, and
- f. a source within said housing for powering said recorder record drive.
Portable apparatus for recording DC arc welding current and operating duration, comprising:
- a. a portable housing adapted to acommodate elements of said apparatus,
- b. input and output cable connectors adapted to be connected to a DC current source and a welding rod holder, respectively,
- c. a shunt for producing a DC arc current signal,
- d. a current relay connected in series with said shunt across said input and output connectors for producing an operating duration signal,
- e. a strip chart recorder for recording the DC arc current signal and including a chart drive movable only under control of said operating duration signal, and
- f. a battery within said housing for powering said chart drive.
Portable apparatus for recording AC arc welding current and operating duration, comprising:
- a. a portable housing adapted to accommodate elements of said apparatus, b. input and output cable connectors adapted to be connected to an AC current source and a welding load, respectively,
- c. a current transformer for producing an AC load current signal,
- d. a current relay connected in series with said current transformer across said input and output connectors for producing an operating duration signal,
- e. a strip chart recorder for recording the AC load current signal and including a chart drive movable only under control of said operating duration signal, and
- f. a battery within said housing for powering said chart drive.
Portable apparatus for recording electrical load current, load voltage and operating duration, comprising:
- a. a portable housing adapted to accommodate elements of said apparatus,
- b. means operatively associated with said electrical load for producing separate load current, load voltage and operating duration signals,
- c. means for separately recording said load current and load voltage signals on a common record and including a record drive movable only under control of said operating duration signal, and
- d. a source within said housing for powering said recorder record drive.
Dependencies are inferred from the claim text.