Abstract: A pressure/force sensor comprises a diaphragm structure including a sensing element and a lead structure extending from the diaphragm structure and including first and second traces electrically coupled to the sensing element. The diaphragm structure and the lead structure include a circuit assembly comprising a common insulating layer and a common conductor layer on the insulating layer. The conductor layer includes at least a portion of the sensing element and at least the first trace.

Abstract: A kit for modifying a firearm such as a Kalashnikov assault rifle, better known as the AK-47, so as to permit the bolt carrier to be pulled back easily with either the right hand or left hand of a user. The kit includes a receiver cover including an arch-shaped crown and a pair of retaining fins that are affixed to the bottom of the crown. Each of the retaining fins has an upper portion extending outwardly and downwardly from a respective one of the opposed sides of the crown. Each of the retaining fins also has a lower portion that extends downwardly from the bottom of one the upper portions. One of the retaining fins is provided with a slot that extends along the length of its upper portion. A guide track is affixed to the retaining fin having the slot. The guide track has a pair of retaining flanges disposed on opposite sides of the slot.

Abstract: A firearm bolt locking mechanism includes a locking pin in the bolt carrier of a firearm like an AK-47 assault rifle or variant thereof. The locking pin is normally urged from the bolt carrier by a compressed spring. The mechanism also includes a pivot arm mounted on the receiver cover of the firearm. The pivot arm has a spring-biased finger that normally fills a hole in the receiver cover. The mechanism further includes a magazine that stops the bolt of the firearm when the last cartridge from the magazine is fired and permits the spring to drive the locking pin into the hole. After replacing the empty magazine with a full one, the pivot arm is pressed to replace the locking pin in the hole with the finger and to release the bolt carrier to chamber a cartridge.