TIME DELAY TRIGGERING UNIT

• US 3,586,332 A
• Filed: 03/15/1968
• Issued: 06/22/1971
• Est. Priority Date: 03/15/1968
• Status: Expired due to Term

• Current Assignee: John M. Alban
• Original Assignee: John M. Alban
• Inventors: Alban, John M.
• Application Number:
  US04/713,465
• Time in Patent Office: 1,194 Days
• US Class Current: 473/578
• CPC Class Codes: B64D 17/34 adapted to control direction or rate of descent
• CPC Class Codes: F42B 10/50 Brake flaps , e.g. inflatable
• CPC Class Codes: F42B 10/56 of parachute or paraglider type
• CPC Class Codes: F42B 12/362 Arrows or darts F42B12/38 takes precedence, having means for implantation, e.g. hypodermic projectiles F42B12/54; arrows or darts in general F42B6/00
• CPC Class Codes: F42B 6/02 Arrows; Crossbow bolts; Harpoons for hand-held spring or air guns
• CPC Class Codes: F42B 6/04 Archery arrows F42B6/08, F41B5/06, F42B12/362 take precedence

Abstract

A triggering unit is provided which will release at a preset time a device it is carrying such as a braking parachute. The triggering unit is housed in a missile capable of being fired through a gas or liquid medium and comprises a primary release mechanism which is connected to a slidable rod. The rod is arranged in the missile housing so that it must move against a force set up by the medium through which the missile passes or the friction forces between the rod and the housing. The rod, which is triggered by the primary release mechanism, will move a specified distance necessary to release the device carried by the unit. The time required for the shaft to move the specified distance is controlled by the forces against which the shaft must move.

Claims

1. A triggering unit mounted in association with an elongated missile for slowing the travel of the missile when fired through a fluid medium which comprises:

a. a member mounted to slide along the length of said missile from a first to a second position, b. braking means carried by said missile and controlled by said member, said braking means being disabled when said member is in said first position and being actuated into braking operation when said member is in said second position, means for maintaining said braking means positioned between opposite ends of said missile in both the disabled and actuated conditions, said braking means when in actuated condition extending out from the exterior of the body of said missile and transverse to the long axis of the missile to slow missile travel, c. means for urging said member from said first position to said second position, d. and means for controlling the sliding movement of said member from said first position to said second position to occur over a predetermined time interval, whereby said braking means is actuated at a predetermined time after said missile is fired, e. wherein said member includes a rod having four portions, the first portion being attached to a primary release means, the second portion carrying a pair of jaws having flanges thereon for engaging a slot in the missile housing, the third portion carrying the braking means and the fourth portion being attached to a spring which assists the sliding movement of the member, said flanges of said jaws when engaged in the slot of the missile housing will hold said spring in a compressed state.

2. The triggering unit of claim 1 wherein an elastic band is placed around the jaws to hold the jaws in a closed position.