Force multiplying type cross-bow |
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| 申请号 | US26462572 | 申请日 | 1972-06-20 | 公开(公告)号 | US3809048A | 公开(公告)日 | 1974-05-07 |
| 申请人 | HANDFORD C; | 发明人 | HANDFORD C; | ||||
| 摘要 | A multiple-arm cross-bow is provided, the same having an elongate central bowstock portion and a plurality of arms extending on either side of the bowstock. The arms are connected together through a pulley construction by a bow-string and are so arranged that the force of the cocked bowstring is applied to the arrow missile over an elongated distance. When the bow-arms are cocked or bent rearwardly for but a short distance a greater average thrust and a multiplied force will be imparted to the arrow. A thrust is applied to an arrow over a longer relative distance but through a shorter interval of time. | ||||||
| 权利要求 | 1. A bow construction including, in combination, an elongate bowstock longitudinally oriented in the direction of arrow lineof-flight; a plurality of pairs of longitudinally spaced bow-arms of said bowstock and having their respective tips disposed on, opposite sides of said bowstock, and a sole bow-string connected to all of said bow-arms proximate said tips and extending across said bowstock, whereby when said tips are forced rearwardly by a pull on the bowstring, in a direction opposite to that of intended arrow line-of-flight, all of said bow-arms will be tensioned simultaneously. 2. The structure of claim 1 wherein said bow-arms each include end pulleys at their tips, said bowstock including multiple pulleys respectively disposed proximate the junctures of said bow-arms with said bowstock, said bow-string being routed around said pulleys. 3. The structure of claim 2 wherein said bowstock iNcludes idler pulleys disposed rearwardly of the rearmost ones of said bow-arms, said sole bow-string being disposed operably upon and interior of said rearward idler pulleys so that the bow-string will be positioned between said rearward idler pulleys when said bow-string is drawn rearwardly to a cocked position. 4. The structure of claim 1 wherein said bowstock includes a plurality of laterally and oppositely positioned bow-arm receiving, unitary hollow bosses, and said bow-arms being seated in and pinned within said bosses. 5. The structure of claim 1 wherein said bowstock includes laterally spaced J-configured spring brackets resiliently engaging respective ones of said bow-arms. 6. A bow construction including, in combination, an elongate bow-stock, a plurality of pairs of bow-arms having their respective tips disposed on opposite sides of said bowstock, a sole bow-string connected to said bow-arms proximate said tips and spanning across said bowstock, a pair of rigid elongate members, each one of said members being disposed respectively on an opposite side of said bowstock and operably connecting successively the tips of said bow-arms. |
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