Chicago, IL, United States
Chicago, IL, United States

Littelfuse, Inc is a multinational electronic manufacturing company based in Chicago, Illinois. The company primarily produces circuit protection products but also manufactures a variety of electronic switches and automotive sensors. Gordon Hunter serves as Littelfuse CEO.Littelfuse is the developer of AutoFuse, the first blade-type automotive fuse. Wikipedia.


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Patent
Littelfuse | Date: 2016-09-09

A power distribution housing including a base, a cover adapted to fit onto the base, a latch member adapted to removably secure the cover to the base, the latch member having a first end pivotably connected to the base and a second end having a latch detent extending therefrom, the latch detent configured to engage a catch in the cover when the latch member is pivoted to a latched position wherein the cover is secured to the base by the latch member, and a locking member coupled to the latch member, the locking member movable between a locked position, in which a locking member extension of the locking member engages a locking member recess in the cover and prevents the latch member from being moved from the latched position to an unlatched position, and an unlocked position in which the locking member extension does not engage the locking member recess.


Patent
Littelfuse | Date: 2016-10-21

An improved fuse including a fuse body formed of an electrically insulative material. The fuse body defines a cavity which extends from a first end of the fuse body to a second end of the fuse body. A fusible element is disposed within the cavity and extends from a first end face of the first end of the fuse body to a second end face of the second end of the fuse body. Insulated plugs are disposed within the cavity at the first and second ends of the fuse body wherein the plugs adhere to an interior surface of the fuse body and form seals that close the internal cavity. The fuse may further include end terminations that are applied to the ends of the fuse body in electrical contact with the fusible element.


Patent
Littelfuse | Date: 2017-01-25

A circuit protection assembly 100 can include a conductive assembly post 110 that supports a first conductive element 104, a non-conductive isolator 108, a second conductive element 106, a fuse 102, and a conductive fastener 112. The first and second conductive elements can be positioned in close proximity to one another below the fuse. A first portion of the isolator can separate the first and second conductive elements. A second portion of the isolator can separate the conductive assembly post from the second conductive element. The first conductive element can be coupled to a power source and the second conductive element can be coupled to a downstream circuit. The fuse can protect the downstream circuit during specified overvoltage and/or overcurrent conditions and can be quickly and efficiently installed and replaced without the need to remove or reattach the conductive elements or any other cabling or wires.


Patent
Littelfuse | Date: 2017-01-11

The present invention proposes a protection device which has a large rated voltage and a large rated current, which is capable of sufficiently suppressing arc generation during activation, and which is also capable of providing suitable protection against overcurrent due to short circuiting or the like of a main circuit. The protection device of the present invention includes (i) a protection element which includes a first thermal fuse and a resistor, and in which the resistor generates heat as a result of current passing through the resistor when there are abnormalities, and the first thermal fuse is activated due to this heat and interrupts the current, (ii) a PTC element and a second thermal fuse which are electrically connected in parallel to the first thermal fuse and which are electrically connected in series to each other, and (iii) a current fuse which is electrically connected in series to the first thermal fuse.


Patent
Littelfuse | Date: 2017-03-15

A method for forming (10) a fuse comprising: threading a fusible element (30) through a cavity (25) of a fuse body (20) with ends of the fusible element (30) being disposed on end faces at respective ends (26-A, 26-B) of the fuse body (20); and depositing an insulative adhesive (40-A, 40-B) within the cavity (25) proximate the ends (26-A, 26-B) of the fuse body (20), wherein the insulative adhesive (40-A, 40-B) adheres to an interior surface of the fuse body (20) and seals the cavity (25).


Patent
Littelfuse | Date: 2016-07-13

A thick film polymer membrane switch (108) can be positioned within a seat belt buckle. The switch (108) can detect if the seat belt buckle is fastened or unfastened. In one approach, an apparatus includes a housing (102) having a cavity (105), an insertion member (118) moveable within the cavity (105), a connector (106) positioned within the cavity (105), and a switch (108) positioned within the cavity (105), wherein movement of the insertion member (118) causes the connector (106) to connect or disconnect from the switch (108). In some approaches, the switch (108) includes a first conductive element formed adjacent a first layer of flexible film, and a second conductive element formed adjacent a second layer of flexible film, wherein the first and second layers of flexible film are separated by a gap.


Patent
Littelfuse | Date: 2016-06-27

A reed for a reed switch and a reed switch are provided. The reed may include a first portion having a first thickness and a first length, a second portion having a second thickness and a second length, and a hinged portion disposed between the first portion and the second portion, the hinged portion having a third thickness and a third length, wherein the third length is less than 150% of the first thickness and the third thickness is less than each of the first thickness and the second thickness. The reed switch may include the reed disposed in an insulating housing with a reed deformer to deform the reed.


A circuit protection assembly (CPA) is disposed between a source of power and a circuit to be protected. The CPA comprises a mounting block having a bore extending therethrough and a recess cavity on a first surface of the mounting block. A post having a first end is disposed within the recess cavity and a body portion extends through the bore. The body portion configured to receive a terminal and the second end configured to receive a securing mechanism. A fuse having a centrally disposed aperture is configured to receive the body portion of the post and to receive the terminal for connection to a circuit to be protected. An insulator disposed on the terminal and disposed beneath the securing mechanism. The insulator configured to isolate the post from the terminal and the fuse while allowing the securing mechanism to apply an amount of torque.


Patent
Littelfuse | Date: 2016-03-30

Described herein is a device for detecting the concentration of a given component in a solution, preferably the concentration of urea in solution with water, comprising: a means (2) for emitting radiation, at least one means (4) for receiving radiation, which is prearranged for determining at least one characteristic of the aforesaid radiation, and a light guide (6), which is prearranged for optically connecting the aforesaid emitting means to the aforesaid receiving means, wherein the aforesaid light guide (6) has at least one surface that is to come into contact with the aforesaid solution so as to determine an interface of separation between the aforesaid propagation medium and the aforesaid solution. The device further comprises control means (100) configured for obtaining a value indicating the concentration of the aforesaid compound in the aforesaid solution as a function of the signal coming from the aforesaid receiving means.


Patent
Littelfuse | Date: 2016-06-22

A system for measuring a current from a battery with a Hall Effect sensor, the current powering a primary load and a secondary load. The system to calculate a status of the battery based on the measured current, then compare the status of the battery to a predetermined value. The system to activate a relay when the status of the battery is below a predetermined value, activation of the relay to prevent the current from powering the secondary load.

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