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The Saddle-Girth Tightener: Two Hinged Plates That Grip the Girth and Lever It Tight
Drawing a saddle-girth tight through its buckle by hand takes a hard pull, and a horseman needs a hoof pick, an awl and a nail puller besides.
Ferdinand von Eulenfeld of Breslau, Germany, received US 455,745, dated 14 July 1891, for a combination tool "more particularly designed for the use of horsemen and cavalry-men and adapted to be compactly folded and constructed for use as a saddle-girth tightener, nail-extractor, punch or awl, calk-tightener, hoof-cleaner, and for other purposes". Two plates hinged together leave a slot between the knuckles for the girth's end; plate B, bevelled, rests on the girth as a fulcrum; moving plate A toward B narrows the slot to grip the girth, and then both plates act as a lever and draw it through the buckle. B carries a nail-extracting notch and a slot for tightening calks; A has a chamber with a pivoted awl under a cover whose arm is a hoof-cleaner.
This rung works out the lever's pull, with a work check, then makes the plates from flat bar with a knuckle hinge and an awl, and tightens a leather strap through a buckle with it.
中级
About 5 hours
说明
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Grip and lever
Grip and lever
正在加载 Jupyter 笔记本…
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A horseman's tool before it
A horseman's tool before it
The embedded blueprint combines a hoof-cleaner with a knife and other tools. Von Eulenfeld builds his around a girth tightener.
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Read US 455,745
Read US 455,745
"When it is desired to tighten a saddle-girth the free end thereof is passed through the slot c. The outer end of plate B, which is beveled, is placed against the girth and serves as a fulcrum. The plate A is then moved toward plate B, as indicated by arrow x, Fig. 7. As the plate A moves toward plate B the slot c becomes narrower, the upper edges of the slot tightly grasping the girth."
"By a further movement of plate A toward plate B both plates act as a lever, being rigidly connected, or substantially so, by the interposed girth D, thereby drawing the said girth through the buckle d and tightening the same. As the leverage afforded by plates A B is considerable, but a slight effort is required to tighten the girth."
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Make the tightener and tighten a strap
Make the tightener and tighten a strap
**Plates.** Cut two 12 cm plates from 25 × 5 mm mild steel flat bar. Bevel the outer end of plate B, file a rectangular notch in it for nails, and cut a rectangular slot through it for calks or nuts.
**Knuckles.** Bend a short strip of flat bar round a rod at the inner end of each plate as hinge-knuckles, set so that when the plates are hinged on a pin through the knuckles a slot about 6 mm wide is left between the knuckles and the plates' ends.
**Awl and cover.** File a chamber into plate A's outer end, pivot a short awl in it on a rivet, and pivot a thin cover over it with a rounded arm as the hoof-cleaner.
**Test.** Buckle a leather strap round a post. Pass its free end through the slot, rest plate B's bevel against the strap, and swing plate A toward B: the slot grips, and the strap is drawn through the buckle. Compare how far you can tighten it by hand, reading the pull with the spring scale.
此步骤所需材料：
低碳钢扁钢0.4 米
低碳钢圆棒0.1 米
抽芯铆钉3 个
皮带条1 个
皮带扣五金套装1 个所需工具：
钢锯
锉刀（手用锉）
什锦锉套装
台虎钳
锤子
丙烷喷灯
充电式电钻
钻头套装
抽芯铆钉枪套件
测力计（弹簧秤）
皮革工作手套
透明安全眼镜5
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A tightener that slips, pinches or will not fold
A tightener that slips, pinches or will not fold
Saddle-girth tightener troubleshooting.
Flow
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History and honest limits
History and honest limits
**Ferdinand von Eulenfeld** of Breslau, Germany, filed US 455,745 on 11 March 1891; it is dated 14 July 1891. The plates A and B had hinge-knuckles a′ a′ and b′ b′; the notch b² extracted nails from a horse's hoof or shoe and the slot b³ served for calks or small nuts; the chambered end of A held a pivoted punch a⁵ under a cover A′ with an arm a³ as hoof-cleaner and a notch a⁴ for opening stirrup-bars. His claims cover the two hinged plates forming the slot, and the combinations with the chambered handle, awl, cover and notches.
**Honest limits.** Filed flat bar and a riveted awl stand in for his made tool, and the test uses a strap on a post, not a horse. The notebook treats the plates as a rigid lever; its forces and lengths are examples. Your tightened strap is the result.
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