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    • 5. 发明授权
    • Transistor protection circuit
    • 晶体管保护电路
    • US4021701A
    • 1977-05-03
    • US638879
    • 1975-12-08
    • Robert Bruce Davies
    • Robert Bruce Davies
    • G05F1/573H03F1/52H02H7/20
    • H03F1/52G05F1/573
    • The disclosed protection circuit which is suitable for providing protection of transistors included in integrated circuits such as regulators and power amplifiers, includes thermal shutdown, safe area and current control circuits. The current control portion includes a sense transistor connected substantially in parallel with the transistor to be protected. In monolithic integrated circuit applications, the sense transistor has an emitter area that is a predetermined ratio of the emitter area of the protected transistor. A "sense resistor" is connected to the sense transistor and develops a control signal which is proportional to the instantaneous current being conducted by the protected transistor. A threshold circuit is coupled between the sense resistor and the drive circuit for the protected transistor and responds to the magnitude of the control signal crossing a predetermined threshold to remove or reduce the drive to the protected transistor.
    • 所公开的适用于提供包括在诸如调节器和功率放大器的集成电路中的晶体管的保护的保护电路包括热关断,安全区域和电流控制电路。 电流控制部分包括基本上与要保护的晶体管并联连接的检测晶体管。 在单片集成电路应用中,感测晶体管具有作为受保护晶体管的发射极面积的预定比率的发射极区域。 “感测电阻器”连接到感测晶体管,并产生与受保护晶体管传导的瞬时电流成正比的控制信号。 阈值电路耦合在感测电阻器和用于受保护晶体管的驱动电路之间,并且响应于超过预定阈值的控制信号的大小以去除或减小对受保护晶体管的驱动。
    • 6. 再颁专利
    • Rifle handguard system with integrated barrel nut
    • 具有集成桶形螺母的步枪护手系统
    • USRE45185E1
    • 2014-10-14
    • US11361036
    • 2006-02-23
    • Robert Bruce Davies
    • Robert Bruce Davies
    • F41A21/00
    • F41G11/003F41A21/482F41C23/16
    • A handguard system for use on a rifle having a barrel and a receiver, the hand guard system includes a barrel nut having an inner surface with a threaded portion adapted to threadably engage the receiver for securing the barrel to the receiver and an outer surface, and a tubular handguard having an end. The tubular handguard is receivable about the barrel and is received about the barrel nut, engaging the outer surface thereof.REEXAMINATION RESULTSThe questions raised in reexamination proceeding No. 90/008,357, filed Dec. 1, 2006, have been considered, and the results thereof are reflected in this reissue patent which constitutes the reexamination certificate required by 35 U.S.C. 307 as provided in 37 CFR 1.570(e) for ex parte reexaminations, or the reexamination certificate required by 35 U.S.C. 316 as provided in 37 CFR 1.997(e) for inter partes reexaminations.
    • 一种用于具有镜筒和接收器的步枪的护手系统,所述护手系统包括镜筒螺母,所述枪管螺母具有内表面,所述内表面具有螺纹部分,所述螺纹部分适于螺纹接合所述接收器以将所述镜筒固定到所述接收器和外表面,以及 具有末端的管状护手。 管状护手可以围绕桶接收并且被容纳在与其外表面接合的桶形螺母周围。 重审结果2006年12月1日提交的第90 / 008,357号复审程序中提出的问题已被考虑,其结果反映在该重新颁发专利中,构成35U.S.C.所要求的复审证书。 根据第37 CFR 1.570(e)的规定,单方面复审,或35 U.S.C.所要求的复审证书。 按照第37 CFR 1.997(e)条的规定进行跨部门重新审查。
    • 7. 发明授权
    • Rifle handguard
    • 步枪护手
    • US08297175B1
    • 2012-10-30
    • US13223263
    • 2011-08-31
    • Robert Bruce Davies
    • Robert Bruce Davies
    • F41A5/00
    • F41C23/16F41A3/94F41A5/18F41A5/28F41A29/02F41C23/04F41C23/06
    • A rifle with an upper receiver and a barrel attached to the upper receiver and including a bolt carrier, and operating, buffer, and cooling systems. The operating system includes a cylinder and a piston coupled to receive propelling gases from the barrel. As the piston moves between retracted and extended positions the bolt carrier is moved between closed and open positions. The bolt carrier includes a weight movable within a guide frame between rearward and forward limits. The buffer system includes a compression spring in a tube attached to the upper receiver in abutting engagement with the bolt carrier. A partially fluid filled cylinder is attached to a coil of the spring and includes a piston and shaft. The piston is formed so that fluid in the cylinder restricts movement in one direction and allows free movement in a second direction.
    • 具有上接收器和连接到上接收器的筒的步枪,包括螺栓托架以及操作,缓冲和冷却系统。 操作系统包括一个气缸和活塞,其连接以接收来自该桶的推进气体。 当活塞在缩回位置和延伸位置之间移动时,螺栓承载件在关闭位置和打开位置之间移动。 螺栓承载件包括可在向后和向前限制之间的引导框架内移动的重物。 该缓冲系统包括一个压缩弹簧,该压缩弹簧连接到上部接收器上,与该螺栓承载件邻接。 部分流体填充的圆筒附接到弹簧的线圈并且包括活塞和轴。 活塞被形成为使得气缸中的流体限制在一个方向上的移动并允许在第二方向上的自由运动。