Patent GB-422557-A (GB)
Title: Improvements in or relating to fire extinguishing arrangements and apparatus therefor
IPC: A62C35/60
Filed: 1933-04-10
Abstract: 422,557. Fire - extinguishing. WARREN, S. F., 27, Lowick Road, Harrow, and BAKER, J. C. Y., 45, Dagmar Avenue, Wembley, both in Middlesex. April 10, 1933, Nos. 10715 and 21538. [Class 47 (ii)] Mechanism for starting a fire - extinguisher by driving in its operating plunger, comprises a casing 1 in which is slidably mounted a plunger 27 which is urged to the left by a spring 30 but is restrained by a catch lever 31, the free end of which is connected to a flexible cable 33 which includes, at a remote point, an inflammable link 34. When the latter fails, the spring moves the lever 31 aside, and the plunger 27 rocks a lever 36 which has an extension 37 outside the casing above the plunger knob 18 of the extinquisher 6. The extension 37 may have a knob 37<1> for hand actuation of the extinguisher, or the latter may be removed from its mounting for hand use. After operation, the spring 30 is reset by unscrewing a plug 38 in the casing and inserting a threaded bolt to force back the plunger 27. The catch lever 31 may be arranged, in moving, to close or open one or more electric circuits which may function to break a vehicle ignition circuit, operate a signal, or stop an electric motor. The inflammable link may be such as is described in Specification 395,734. Alternatively, a fusible link may be used, or a manual device adapted to release the end of the cable. As shown in Fig. 6, a spring-pressed rod engages an aperture 58 in a member 59 at the end of the cable, and can be withdrawn by the knob 54 to release the cable. In a modification, the end of the cable is attached to a rod which can slide lengthwise of the cable when it is turned axially to bring a pin into register with a slot. The extinguisher 6 may be of the gas-capsule type described in Specification 410,156 or, as shown, of the pressure type, with a seal 15, weighted, flexible, dip tube 13, and hollow piercer 16. The plunger 17 is sealed by a diaphragm 44. The casing 1 is secured to a bracket 8 formed with a mediumdischarge passage connected to a discharge pipe 25 fitted with an atomizing nozzle 40. The latter comprises a tangential inlet 43 and a spray aperture of the shape shown. The passage in the bracket is formed with several outlets so that the pipe 25 can be connected in various positions, any outlet not in use being closed by a plug 19. The extinguisher is held in the bracket with its nozzle 23 in fluid-tight engagement with the passage by a clip 5 with releasable fastening 7. In a modified operating mechanism, Fig. 8, the plunger 27 is restrained by a catch lever 70 the free end of which is connected by a link 72 to the mid-point of a lever 73 which is connected at its ends respectively to cables 74, 75 incorporating inflammable or manual release means. Release of either cable allows the lever 73 to turn to release the catch lever 70. A single flexible cable may, alternatively, be used. In other modifications, Fig. 9, a pull on the flexible cable 74 rocks a lever 76 to release the lever 73 ; or the lever 76 may engage directly with the free end of the lever 70. As shown in Fig. 9, the lever 73 is also released by release of the cable 75. In another modification, Fig. 12, a manual release is embodied in the casing 1. The catch lever 80 engages a pin 82 in a lever 83 which is pivoted at one end at 84 and connected at the other end to a releasable cable 87. The pivot 84 can be pulled out by hand, allowing the lever 83 to pivot about its connection with the cable 87 and so release the catch lever. British Specification 384,127 and U.S.A. Specification 1,856,575 also are referred to.