Abstract:
A bake plate is integrally formed from a copper disk whose lower surface defines a desired heater element channel pattern that is filled with electrically conductive resistive material. Copper contamination is prevented by coating the structure. The channel pattern and fill material may be tailored to optimize thermal uniformity across the bake plate surface, and to produce a bake plate that may be mass produced with substantially uniform and repeatable thermal characteristics.
Abstract:
A resistance element (19) for a device for shrinking shrinkable sleeves comprises an elongate electrical conductor extending in a zigzag pattern and bent to a tunnel shape. The shrinkable sleeve including for example an optical fiber enclosed therein is placed in that region of the resistance element (19), which corresponds to approximately the geometric axis of the upper semi-cylindric portion of the tunnel shape. The resistance element (1) has attachment pins (33) and contact and attachment pins (35) at its front and rear sides respectively intended to be placed in corresponding recesses in a lid of the device. The rear contact and attachment pins (35) have portions (39) intended for contact with elastic, electrically conducting contact pins with which the resistance element (19) comes in contact, when the lid is folded down to perform the shrinking operation. The open and freely suspended design of the resistance element (19) including only small contact areas to the lid result in that the resistance element can be rapidly heated and thereafter rapidly cooled implying that a shrinking operation can be executed in a minimum of time.
Abstract:
A control of an instantaneous flow-through fluid heater system (1000) that incorporates a logic control method providing modulation of power in small steps to a plurality of heating elements (5) retaining responsiveness to closed-loop control needs without inducing light flicker. The life of the coils of heating circuit electromechanical relays are extended by energizing the coils with a pulse-width-modulated drive decreasing in duty cycle and thus the latent coil heat when an increase in mains voltage is sensed. The life of the contacts of same relays are extended by inhibiting heating element triac drive immediately upon sensing loss of relay coil power, such as by an over temperature limit switch (8) opening, thus ensuring that relay contacts open with zero heating element current.
Abstract:
An oxidation-resistant alloy for use in a high-temperature or thermal cycling environment. The alloy comprises a nickel-based matrix having a solid solution of 19-23 % chromium and 3-6 % aluminum. A self-healing, thermodynamically stable oxide layer is formed upon a surface of the alloy which is exposed to an oxidizing atmosphere over a range of temperatures for extended periods of time. The oxide layer protects the alloy from the oxidizing atmosphere. Additions of calcium and yttrium are made to the matrix to substantially remove or stabilize oxygen and sulfur dissolved in the molten alloy. These additions result in retention of about 0.005-0.05 % of calcium and 0.01-0.06 % yttrium in the cast alloy. The matrix further includes about 2-8 % iron to inhibit nucleation and growth of a "gamma prime" nickel aluminum intermetallic compound which would otherwise adversely harden the alloy and cause local disturbance of a uniform distribution of aluminum. The alloy has a VHN below about 350.
Abstract:
Electric radiating tube (30) for generating and diffusing heat obtained with spirally wound bands (20-23), entirely or partially superimposed, one or more of said bands (20, 22) being of electrically insulating material and one or more of said bands (21, 23) being of highly conducting material, thickness being measured in microns with an extremely high ratio between area and thickness, and of a constant cross section, there being at the ends of said tube (30) means of connection and contact (32, 43, 44) for electric feed, said means being connected to one or more of the highly conducting bands (21, 23).
Abstract:
Disclosed is a process of manufacturing a water-based adhesive bonded, solvent resistant protective laminate utilizing the steps of: providing a film having a first surface and a second surface; depositing a discontinuous coating of a cross-linked, carboxylated styrene-butadiene rubber latex adhesive on the first surface of the film, the latex adhesive containing an effective amount of a cross-linking agent; joining a fibrous nonwoven web into intimate bonding contact with the film and adhesive; and removing water from the adhesive thereby causing cross-linking at reactive sites. The adhesive may be deposited utilizing gravure printing techniques and is desirably deposited at a rate greater than about 2 grams per square meter of film. Also disclosed is an adhesively bonded, solvent resistant protective laminate produced by the process. The film component of the laminate may be composed of a thermoset polymer or a thermoplastic polymer. The film may also be microporous or microapertured. The nonwoven fibrous web component may be selected from bonded carded webs, spunbonded webs, webs of meltblown fibers, multi-ply fibrous webs containing the same type of fibrous web, and multi-ply fibrous webs containing different types of fibrous webs.
Abstract:
The invention relates to a rigid container, such as a tank, cistern, or other open or closed vessel, which is intended particularly, but not exclusively, for storing, heating or sustaining the temperature of a fluid, and wherein embodies electrical resistance wires or filaments which can be connected to a current source via electrods. A significant feature of the invention is that a) the container comprises a layer of material which is electrically conductive and has the commercial designation Semicon CT 6011:70; and in that b) the layer of electrically conductive material has applied externally thereon a layer of good-insulating, fire-resistant material having the commercial designation Isofiber Struktur.
Abstract:
발열체 및 이를 포함하는 히터유닛이 제공된다. 본 발명의 예시적인 실시예에 따른 발열체는 판상의 외장재; 상기 외장재의 내부에 배치되고, 전원인가시 열을 발생시키는 발열원; 및 상기 외장재의 표면을 지나가는 유체에 와류를 발생시켜 유체의 통과속도를 저감시킬 수 있도록 길이방향을 따라 반복적으로 형성되는 복수 개의 와류발생패턴;을 포함한다.