US1104484A - Shoemaker's jack. - Google Patents

Description

W. BSGHE. SHOEMAKERS JACK.

APPLICATION FILED 00T. 9, 1913.

Patented July 21, 19,14

if @K @MO/@www THE NORRIS PETERS CU.: PHDTO-LITHO.. WASHINGTON. D4 C.

UNITED STATES PATENT ernten.

WILLIAM ESCHE, 0F MILWAUKEE, WISCONSIN, ASSIGNOR OF ONE-HALF TO ERWIN B. LOEWENBACI-I, 0F MILWAUKEE, WISCONSIN.

SHOEMAKERS JACK.

Specification of Letters Patent.

Patented July 21, 1914;l

Application led October 9,K 1913. Serial No. 794,286.

To all 'whom it may concern.'

Be it known that I, WILLIAM Escnn, a citizen of the United States, and resident of Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented certain new and useful Improvement-s in Shoemakers7 Jacks; and I do hereby declare that the following is a full, clear, and exact description thereof.

My invention has for its object to provide a simple, economical and effective shoemakers jack especially adapted for re pair work, the construction and arrangement of which jack is such that the last is capable of both longitudinal and transverse adjustment, whereby the shoe or boot is completely filled out to facilitate the work.

With the above object in view the invention consists in certain peculiarities of construction and combination of parts as hereinafter set fort-h with reference to the accompanying drawings and. subsequently claimed.

In the drawings Figure 1 represents a longitudinal sectional elevation of a jack embodying` the features of my invention; Fig. 2, a plan view of the same with parts broken away and parts in section to more clearly illustrate details of construction, the section being indicated by line 2 2 of Fig. l, and Fig. 3, a detailed inverted plan view of a two-part sole member constituting one of the members of the last.

Referring by characters to the drawings, 1 represents a hollow standard having a pintle stud 2 extending from its foot portion for engagement with a centrally apertured block 3, which block is pivoted to a base 4, the standard stud 2 being confined within the block. by means of a set-screw 3, the inner end of which engages an annular groove that is formed in said stud. By this construction it will be seen that the standard is capable of being tilted at any angle for convenience of the operator and the same is also capable of horizontal swing due toits stud connection, it being obvious that, under certain conditions, the standard can be locked against horizontal movement by tightening the set-screw 3.

The standard 1 terminates with a head 5 having' a horizontally disposed aperture 5 therein, the upper face of the head being fitted with a removable heel-plate 6, whereby different sizes of said heel-plates may be employed. The horizontally disposed aperture 5 of the standard head is provided for the reception of the squared shank 7 of an instep block 8, which block is thus capable of longitudinal adjustment relative to the heel-plate, being supported by its shank that'is in slidable engagement with the head. The heel end of the instepblock 8 is vertically slotted for the reception of one arm 9 of a bell-crank lever, which lever is pivotally connected to the instep-block. The end of the arm 9 engages a slot 9 that is formed in one end of a stem 10, which stem is countersunk within the flat base of the instep block and is adapted to slide back and forth therein under control of the bell-crank lever. The opposite end of the stem 10 is transversely branched and carries a pair of camactuat ing lugs 10', which lugs are in the form of rollers for the purpose of eliminating friction and project above the flat base of said instep-block. vided with front and rear transversely disposed dovetailed guide-rails 11, 11', respectively. The guide-rails are arranged to receive a pair of longitudinally divided sect- ions 12, 12, of a sole-plate, which sections, as best shown in Fig. 3, are formed with front and rear transversely disposed dovetailed grooves 13, 13, for engagement with the guide- rails 11, 11, it being understood that the members forming the soleplate are provided with flat faces slidable upon the flat base of the instep-block. The flat faces of each of the sole-plate members are also provided with corresponding obliquely disposed cam grooves 14, 1-1, which grooves converge toward the heel portion of the sole-plate and intersect each other at the division line between its sections. The cam-grooves receive the cam-lugs 10 which project upwardly from their actuat- The instep-block is also prosoy instep-carrying bell-crank lever projects into the hollow standard and is connected to a treadle 15 by a link 16. 'Ihis treadle is fulcrumed within the standard and has connected. thereto one end of a coiled spring 17, the opposite end of which is secured to the standard, the said coiled spring serving to impart a lifting movement to the treadle and its connection to the bell-crank lever, whereby the stem 10` which carries the cam-lugs is forced outwardly or toward the toe portion of the last to thus contract the sole-plate members.

The inner end of the instep-block shank 7 is connected to one arm of a bell-crank lever 18, which lever is also fulcrumed within the standard. The opposite arm of this bell-crank lever is connected by a link 16 to a treadle 15 which corresponds in every respect to the treadle previously described, bein fulcrumed within the standard and having a coiled spring connection 17. 'Ihe action of the lcoiled spring 17 tends to lift the treadle 15 and, through its bell-crank connection with the shank 7, cause the instep-block, together with the sole-plate carried thereby, to move toward the heel-plate 6 and contract the last longitudinally. Thus it will be seen that the springs which connect the several lever mechanisms serve to contract the various parts of the last in opposition to power applied to the treadles. IVhen the last is so contracted the shoe or boot is inserted over the parts, as indicated in dotted lines, and to iill out said shoe lengthwise the operator presses treadle 15', causing the foot portion of the last comprising the sole-plate and instep-block to move away from the heelplate and lengthen the last longitudinally to the desired dimension. In order to lock the parts in their lengthened position, I pro- Vvide a spring-controlled pawl 19, which pawl is in -pivotal union with the treadle 15 and is adapted to engage any one of a series of ratchet-teeth 2O that are formed within the edge of one wall of the standard 1. The sole-plate expanding treadle 15 is provided with a similar pawl and ratchet mechanism for locking said treadle in a depressed position. After the last has filled out the shoe longitudinally the operator presses the treadle 15, whereby motion is imparted to the stem 10 through the bell-crank lever, which action causes said stem to move toward the heel-plate and, owing to engagement of the cam-lugs 10 with the obliquely disposed grooves 141, 14V, of the sole-plate, the members of said sole-plate will thus be spread apart to fill out the width of the shoe, whereby the latter isfiirmly held in all directions for the convenience of the operator, it being understood that when the treadle 15 is depressed it is locked in such depressed position by the pawl 4and ratchet mechanism.

While I have illustrated mechanism whereby the standard may be revolved upon an axis and tilted at various angles, it is obvious that said standard, in some instances, may be rigidly fastened toa bench. Itis also manifest that, while I have described specific construction for carrying out my invention, I may, without departing from the spirit of the invention, vary the details within the knowledge of skilled mechanics.

I claim:

1. A jack comprising a standard having a head, a heel-plate carried by the head, an instep-block carried by the standard and ad justable longitudinally relative to the heelplate, a longitudinally divided sole-plate iitted upon the instep-block, and means for spreading and contracting the sole-plate transversely.

2. A jack comprising a standard having a head, a heel-plate carried by the head, an instep-block in yslidable union with the standard head, a longitudinally divided sole-plate mounted upon the base of the instep-block, means for transversely adjusting the sole-plate members, and actuating meehanism for adjusting the sole-plate and instep-block. Y

3. A jack comprising a standard having a head, a heel-plate carried thereby, an instepblock having a shank in slidable union with the head, a longitudinally divided sole-plate having obliquely disposed cam surfaces therein, a slide carried by the instep-block provided with lugs for engagement with the sole-plate cam-slots, transversely disposed guides connecting the sole-plate and instepblock, an actuating lever for the slide, and an actuating lever for the instep-shank.

4. A jack comprising a hollow standard having a head provided with a horizontally disposed aperture, a heel-plate carried by the head, an instep-block provided with a shank in slidable union with the head aperture, a longitudinally divided sole-plate fitted to thebase of the instep-block, transverse guides connecting the sole-,plate and instep-block, obliquely disposed cam surfaces carried `by the sole-plate members, a longitudinally slidable stem having lugs for engagement with the cam surfaces of the sole-plate, a bell-crank lever in pivotal union with said instep-block having one arm engageable with the slidable stem, a bell-crank lever in pivotal union with the standard having one arm engageable with the shank of the aforesaid instep-block, levers carried by the standard in connection with the bellcrank levers, and means for locking vsaid levers.

5. A j ack comprising a standard provided with a head, a heel-plate carried thereby, an instep-block in slidable union with the head,

va longitudinally divided sole-plate mounted upon the base of the instepeblock, means for spreading and contracting the sole-plate the county of Milwaukee and State of Wisnieln-loers transversely, and` means for ad- Consin in the presence of two Witnesses.

justing the instep-block, together With the sole-plate, longitudinally relative to the WILLIAM ESOHE' 5 heel-plate. Witnesses:

In testimony that I claim the foregoing I GEO. W. YOUNG, have hereunto set my hand at Milwaukee in M. E. DOWNEY.

Copies of this patent may be obtained for ive cents eaeh,-by addressing the Commissioner of Patents, Washington, D. C.

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