Cutlery – Cutting tools – With material receiving opening
Patent
1984-09-11
1986-05-13
Kazenske, E. R.
Cutlery
Cutting tools
With material receiving opening
30 92, 30277, 83639, 114221A, B26B 300
Patent
active
045877335
DESCRIPTION:
BRIEF SUMMARY
The present invention refers to a percussion device for triggering the primer of an explosive charge in an actuator device, including a support arranged in order to be able to be attached to the said actuator device, a striker member which is equipped with a percussion tip and is mounted to be able to move with respect to the support so as to be able to trigger the primer under the effect of a force acting upon this striker member and a spiral spring for delivering the said force to the striker member.
Devices of this type generally include a compression spring which acts upon one end of a striker member so as to accelerate it over a distance which corresponds with the elongation of the spring upon its expansion. These devices are rather complicated, costly and relatively heavy.
The aim of the invention is to provide a percussion device which is extremely simple, effective and light and very low in cost price.
With this object, the device in accordance with the invention is characterized in that the spiral spring is a tension spring the first end of which is attached to the striker member which is equipped with a percussion tip and is mounted to be able to move with respect to the support so as to be able to trigger the primer under the effect of a force acting upon this striker member and a spiral spring for delivering the said force to the striker member, characterized in that the spiral spring (7) is a tension spring the first end of which is attached to the striker member (4), the percussion device including means (10) of holding back the second end of the spring so as to keep it in a stretched state corresponding with the cocked state of the percussion device, and of freeing this second end of the spring at the required moment so as to cause contraction of the spring and the appearance at the first end of it.
The support of this percussion device may exhibit a tubular shape, a first end of the support being arranged so as to enable mounting of the actuator device and the wall of the support being arranged so as to hold a striker member of essentially cylindrical shape in the vicinity of the primer, the second end of the spring being preferably equipped with a hook member arranged so as to cooperate with the second end of the support.
The invention may be employed in particular for the creation of a tool for cutting wires or cables, the percussion device being then associated with an actuator device in the form of a holder unit for a cutter driven by an explosive charge, mounted on the support of the percussion device.
The percussion device in accordance with the invention includes a minimum of different parts and may be produced, at least as far as the support and the striker member are concerned, from very light materials such as alloys of aluminium or plastics matter. It may in particular be designed in order to be associated with an actuator device intended to serve only once, such, for example, as a holder unit for a cutter driven by an explosive charge for the cutting of guy cables, which may be employed in particular on a boat in the event of dismasting, or of high voltage electric cables.
The invention will be better understood in the light of the description given below of embodiments illustrated in the attached drawing.
BRIEF DESCRIPTION OF THE DRAWING
FIG. 1 is an axial section of an embodiment of a percussion device in accordance with the invention, associated by way of example with a cutter-holder unit for cutting a cable, this FIG. 1 representing the cocked state of the percussion device;
FIG. 2 is a similar view of the assembly as FIG. 1 in the state following the percussion;
FIG. 3 is a view partially in section, of a cutterholder unit employed in the assembly as in FIGS. 1 and 2; and
FIG. 4 is a view of a striker member in accordance with a variant embodiment of the present device.
DESCRIPTION OF THE PREFERRED EMBODIMENT
The percussion device represented in FIGS. 1 and 2 includes a tubular support 1 to a first end of which is attached a cutter-holder unit 2 indicated diagrammatic
REFERENCES:
patent: 1450672 (1923-04-01), McEwan
patent: 2140214 (1938-12-01), Temple, Jr.
patent: 3353445 (1967-11-01), Temple et al.
patent: 3369534 (1968-02-01), Crosman
patent: 3386334 (1968-06-01), Temple et al.
patent: 4026028 (1977-05-01), Green
Kazenske E. R.
Phan Hien H.
Tulcea, S.A.
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