Improvement in clamps
US 104606 A
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Description (OCR text may contain errors)
N. PETERS. PHOTOALtTHOGRAMER, WASHINGTON. D, C.
`ties with projecting jaws or arms, andat back with a j spiral cani, pivoted upon one bar and engaging with a i i rack on the other, as hereinafter described.
v General Description with Reference to the Drawing. Figure 1 is a perspective view of a clamp embody- `'cam detached. i i
4 i j clamp.`
slideiu a groove oi' channel, F, formed by two flanges,
j other parts, and are connected by a bridge, H, having sidewitli a-spiral thread, L, that gearswith a corresponding rack, M, on the front side of the shank D.
marasma JoIInJgLEBEAU, or
L'etters Patent No. 104,606, dated .Tune 21, 1870.
mrnovnmnm: m cnet/Irs.
The Schedule referred to in these Letters Ifatexn:w and making part of the same I, JOIIN J. LEBEU, of Cincinnati, Hamilton county, Ohio, have invented a new and useful Clamp, oi' which the following isa specification.
Nature and Objects of the Invention. v The subject of myinvention is a clamp for molders, cabinet-makers, and others. Y 4 It consists, essentially, ot' a pair of bars, sliding one upon or within tha-other, provided at their extremiing'my invention. j
Figure 2 is` a rear perspective \"iew ofthe spiral Figure 3 is a transvere section at the line a: a'.
Figure 4 is `a longitudinal section of a portion of' my Figure ral cam.
is `a -rear view of a inodiiiea'tion of my spi- A A' represent portions of a dusk or 4other article B` and C are the jaws,projectin g rectangular-ly from s 'hanks D and E, 'ot' which the shank D is adapted to Gr G', on the front side ofthe shank E.
The anges G G' are at their inner ends somewhat more elevated from the front of the shank than at a circular boss, l, that enters a corresponding eye or orifice, J, at the centre of adisk, K, armed on its `rear The cam-disk K L is centered and held in place on the boss I by means of a screw-bolt, N, and nut O, a washer; P, being interposed between the nut'O and oi' said disk about the boss I as a center, without loosening or disturbing the'nut.
' The cam-disk K L is turned either forward or backward at will, bymeans of itshandle Q.
The bridge'H, together with its appendages I N O P, is set at sufficient Obliquity with' the shank E to cause its thread L to enter or engage with the rack M on one sideonly. i
It will be seen that no part of this clamp projects beyond the jaws, and thattlie means employed for extending or contracting it, or such as, by their Yfriction, to hold the jaws to any specific adjustment with'- out any speelde or special contriva'nce for that pur-` pose. 4.
Instead of making the cam of a single continuous thread, as represented in figs. 1, 2, 3, and 4, it maybe in g. 5, more threads may and in some cases, if preferred, two, three, or
thread engaging before its predecessor has left.
That'side of the cam from which the thread L pro-'- jects maybe slightly coned or crowned, instead of dat, as in the present illustration.
- I claini as my invention-` '.Lhe relative arrangement of the jaws B and C, pro v jecting from the extremities of their respective shanks D and E, in combination with the ca1n-disks K L, pivoted to a bridge at the back of one shank, and engag ing with a rack, M, at back of the other, when consti-noted substantial] y as and for the purposes specified. In testimony of which invention I hereunto setmy liand.
J. J. LEBEAU.
fitncsses Guo. H. KNIGHT, JAMES H. LAYMAN.
be employed, and the said threads lshould be arranged in a manner that will insure one