US764937A - Machinist's combination-tool. - Google Patents

Description

PATENTED JULY 12, 1904.

. s FRIEDMAN. MAGHINISTS COMBINATION TOOL.

APPLICATION FILED FEB. 9. 1904.

N0 MODEL.

UNITED STATES Patented July 12, 1904.

PATENT OFFICE.

MACHINISTS COMBINATION-TOOL.

SPECIFICATION forming part of Letters Patent No. 764,937, dated July 12, 1904.

Application filed February 9, 1904. Serial No. 192,755. (No model.)

To all whom it may concern.-

Be it known that I, SIGMUND FRIEDMAN, a citizen of the United States, residing in Paterson, in the county of Passaic and State of New Jersey, have invented certain new and useful Improvements in Machinists Combination-Tools; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

The object of this invention is to provide a simply-constructed, inexpensive, and durable combination measuring instrument for use by machinists or the like; and it consists in certain features of construction combined and arranged substantially as hereinafter set forth and claimed in such manner as to attain the objects mentioned.

My invention will be found fully illustrated in'the accompanying drawings, wherein Figure 1 is a plan view thereof. Fig. 2 is a view of the left-hand end portion of the instrument, showing certain parts broken away and others in section. Fig. 3 is a sectional view taken transversely of the instrument between two of the heads or jaws e, hereinafter referred to, and looking toward the left-hand one. Fig. 4: is a plan view of the left-hand portion of the instrument as shown in Fig. 1, but provided in this instance with calipers instead of dividers, as in Fig. 1. Fig. 5 shows another form of caliper-leg that may be used; and Fig. 6 is a transverse section through one of the heads or jaws above referred to, showing a modification of the invention.

a is a steel arm in the form of a plate or strip, one of whose edges is divided off, as at b, to any desired degree after the manner of a rule and having one end turned off at right angles, as at 0, Fig. 2. The part 0 is reinforced or thickened up by a'bifurcated block (Z, (see Fig. 3,) riveted thereto, so that the whole forms, as at e in Fig. l, the head of a square or one jaw of a sliding caliper. The plate a is provided with a lengthwise slot f, and the thus divided portions of the plate are held together at the end remote from the head or jaw by a block g, into which said plate projects and which may be secured to said plate by screws /L. In the slot f is arranged a screw 2', one of whose ends, j, is reduced and jour naled in the plate a between the bifurcated portions of the block (Z and the other, 70, of which is journaled in the block g and squared, receiving at its extremity a crank Z or other form of handle for rotating the screw. m is the part forming the other head or jaw of the sliding caliper. This is in the form of two plates at, riveted together and provided with corresponding grooves 0, each of which receives one of the two members p of the plate a, formed by dividing the latter lengthwise by the slot f. The screwz' has an internallythreaded engagement with the plates a of the jaw or head m, so that when the screw is rotated the jaw or head is moved lengthwise of the plate a-that is to say, adjusted with reference to the jaw or head a. As so far described, the instrument is adapted for use as a sliding caliper.

Hinged to the block (Z on the end thereof remote from the divisions b on plate a is a holder g, and similarly hinged to the head m is another holder, 1'. The head or jaw which comprises block (Z is forked at (Z, at one end receiving a projection q of holder q, and the plates n n are at one end of head or jaw m spaced, as at on, receiving a projection 1" of holder '1'. The pivot between each holder and the corresponding head or jaw is formed in each instance by a screws, which carries'a thumb-nut 6, whereby the holder may be clamped in any position to which it is pivotally adjusted. Each holder forms a socket for the reception of one of two legs a, which may be either formed, as in Fig. 1, as the legsof a pair of dividers, or, as in Figs. 4. and 5, as the legs of calipers of different shapes, such leg being held in place in the holder by a set-screw e.

As thus far described the instrument is adapted not only as a sliding calipers, but as a dividers orcalipers having pivoted legs, adjustment being possible both by turning the screw to adjust the head or and by moving either leg at on its pivot ln'order to make possible the quick setting of the head in to approximately the point on the plate a to which is to be adjusted, the part of the head m which immediately engages the threading of the screw may be the form of a disconnective connecting means between said head on and the screw.

In Fig. 6, w is a sliding block having one end threaded and normally held in engagement with the threading of the screw by a spring m, disposed between said block and the end of the recess 1 in the head m, in which said block is mounted. is a knob carried by said block, whereby to press it back out of engagement with the screw, so that the head will be free to be slid lengthwise on the plate a. Of course in this case it will be understood that the screw 11 has no direct connection with the head m, the opening for the screw through the head being in this instance smooth.

In using the instrument as a square it may be found convenient to remove the head m from the arm a. For this purpose the crank 6 may be secured on the squared portion A: of the screw 01 by a screw .2, so that the crank Z can be removed, whereupon the screws it may be removed, so as to detach the block g and permit the head m to be slid ofi' the arm.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination of an elongated longitudinally-slotted plate provided with divisions and thus forming a scale and also having at one end an integral turned-off portion, a bifurcated block receiving said end of the plate and the turned-ofi portion thereof and secured thereto and thus forming a fixed head or jaw, said head or jaw being forked at one end thereof, a holder pivoted in the forked portion of said head or jaw, a sliding head or jaw arranged to move on said plate, ascrew arranged in the slot of said plate and journaled in said first-named head or jaw and having its thread engaging the sliding head or jaw, and another holder pivoted in said sliding head or jaw, substantially as described.

2. The combination of an elongated longitudinally-slotted plate provided with divisions and thus forming a scale, a head or jaw fixed to said plate at one end thereof, a holder pivoted in said head or jaw, a movable head or jaw comprising plates secured together on opposite sides of said elongated plate and having opposed slots receiving the portions of said elongated plate which are separated by the slot of the latter, said plates being spaced at one end'of said movable head or jaw, another holder pivoted in between the spaced portions of said plates, and a screw journaled in said fixed head and disposed in the slot of the elongated plate and having its thread engaging said movable head or jaw, substantially as described.

In testimony that I claim the foregoing I have hereunto set my hand this 8th day of February, 1904.

SIGMUND FRIEDMAN.

Witnesses:

JOHN W. STEWARD, ROBERT J. PoLLITT.

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