US1528993A

US1528993A - Grinding machine

Info

Publication number: US1528993A
Application number: US685770A
Authority: US
Inventors: Emil A Samuel
Original assignee: LA Young Industries Inc
Current assignee: LA Young Industries Inc
Priority date: 1924-01-12
Filing date: 1924-01-12
Publication date: 1925-03-10
Anticipated expiration: 1942-03-10

Description

1,528,993 E. A. SAMUEL GRINDING MACHINE March 10, 1925.

Filed Jan. 12. 1924 Patented Mar. 10, 1925 UNITED STATES- 1,528,993 PATENT OFFICE.

EMIL A. SAMUEL, OFv DETROIT, MICHIGAN, ASSIGNQR TO L. A. YOUNG INDUSTRIES, INC., OF DETROIT, MICHIGAN.

GRINDING MACHINE.

Application filed January 12, 1924. Serial No. 685,770.

is of large capacity, may be readily set up for springs of different diameters and one in which the work is very securely held.

Further objects and objects relating to structural details, will definitely appear from the detailed description to follow.-

I accomplish the objects of my invention by the devices and means described in the following specification. The invention is clearly defined and pointed out in the claims.

A structure which is a preferred embodiment of my invention is clearly illustrated in the accompanying drawing, forming a part of this invention, in which:

Fig. I is a fragmentary front perspective view of a grinding machine embodying the features of my invention, the work holder being in retracted position.

Fig. II is a fragmentary side elevation of the .work holder.

Fig. III is a detail section on a line corresponding to line 33 of Figs. I and II.

In the drawing similar reference characters refer to similar parts throughout the several views, and the sectional views are taken looking in the direction of the little arrows at the ends of the section lines.

Referring to the drawings, 1 represents the bed of the machine and 2 the grinding discs which are supported in spaced relation so that the work may be introduced between them.- As the structural details of these parts and the driving means for the discs form no part of this invention, they will not be further described herein.

At the front of the machine I mount a rock shaft 3 carrying an arm a on which the work holder is mounted. This work holder comprises a cross head 5 pivoted at 6 on the arm and provided with a disc 7 having holes 8 therein which may be engaged by the locking pin 9 to hold the cross head in its adjusted position. This locking pin is provided with a hand lever 10 and is held in engaging position by the spring 11.

At each end of the cross head 5 is a pair of pocket frames12, these pocket frames being of rectangular form and disposed in an outwardly diverging relation, the frames being open to each other at their inner ends. The frames are open at both sides and receive a plurality of tubular pockets 13, these pockets being short sections of tubes of proper diameter to receive the springs which are to be ground. The pockets are changed the machine is to be adapted for springs of different diameters, as the springs should be a fairly good fit in the pockets, that is, while the diameters should be such as to permit ready removal or insertion of the springs, they should also be well supported by the pockets.

The pockets are clamped in position by the clamping bars 14 disposed in outwardly diverging relation and clamped upon the pockets by means of the wedges 15. These wedges have threaded shanks 16 disposed longitudinally of the cross head 5 and ad justably supported by means of the nuts 17. When the wedges are forced outwardly by these nuts, the clamping bars are clamped against the pockets. The wedges preferably engage grooves 18 in the inner sides of the clamping bars, thereby serving as an eifective means for retaining the clamping bars.

In practice, one of the pockets at one end of the work holder is presented tothe grinding disc by rocking the rock shaft 3. The pockets at the other end of the holder may be filled during the grinding operation.

The machine is of large capacity and the work is effectively held, the pockets being readily clamped up so that they are effectively retained in the holders and without the necessity for care in adjusting while the pockets are assembled therein.

I-Iaving thusdescribed my invention, what I claim as new and desire to secure by Letters Patent, is:

1. In a grinding machine, the combination of a pair of spaced grinding discs, a rock shaft, an arm on said rock shaft, a work holder comprising a cross head pivotally mounted on said arm and provided at its ends with pairs of open sided work pocket frames of rectangular form disposed in outwardly diverging relation and open to each other at their inner ends, tubular open ended pockets arranged in said pocket frames, pocket clamping bars arranged at the inner ends of said pocket frames and having longitudinal grooves on their inner faces, clam'p ing wedges engaging said grooves of said clamping bars, said clamping wedges being provided with threaded shanks disposed longitudinally of said cross head and with adjusting nuts engaging the ends thereof, and means for securing said cross head in its adjusted positions whereby either end may be presented to said grinding discs.

In a grinding machine, the combination of a pair of spaced grinding discs, a rock shaft, an arm on said rock shaft, a work holder cross head pivotally mounted on said arm and provided at its ends with pairs of open sided work pocket frames ofrectangus lar form disposed in outwardly diverging relation and open to each other at their inner ends, tubular open ended pockets arranged in said pocket frames, pocket clamping bars arranged at the innerends of said pocket frames, clamping wedges disposed between said clamping bars, means for adjusting said clamping wedges, and means for securing said cross head in its adjusted positions whereby either end may be pre sented to said grinding discs.

3. A work holder for grinding machines comprising a pivotally mounted cross head provided at its ends with pairs of open sided pocket frames of rectangular form disposed in outwardly diverging relation, said 1 'ames being open to each other at their inner ends, tubular pockets arranged in said pocket frames, pairs of pocket clamping members arranged at the inner ends of said frames in outwardly converging relation, and clamping wedges disposed between said pairs of clamping members to coact therewith, said clamping wedges being provided with threaded shanks disposed longitudinally of said cross head and with nutsengaging the ends thereof whereby the wedges may be adjusted to clamp said clamping members. against the pockets arranged in said frames.

4. A work holder for grinding machines comprising a pivotally mounted cross head provided at its ends with pairs of open sided pocket frames of rectangular form disposed in outwardly diverging relation, said frames being open to each other at their inner ends,

tubular pockets arranged in said pocket frames, pairs of pocket clamping members arranged at the inner ends of said frames in outwardly converging relation, and clamping wedges disposed between said pairs of clamping members to coact therewith.

. 5. A work holder for grinding machines comprising a pivotally mounted cross head provided at its ends with pairs of open sided pocket frames disposed in opposed relation, said frames being open to each other at their inner ends, tubularpockets arranged in said pocket frames, pairs of pocket clamping members arranged at the inner ends of said frames, and clamping wedges disposed between said pairs of clamping members to coact therewith, said clamping wedges being provided with threaded shanks disposed longitudinally of said cross head and with nuts engaging the ends thereof whereby the wedges may be adjusted to clamp said clamping members againstthe pockets arranged in said frames.

6. A work holder for grinding machines comprising a pivotally mounted cross head provided at its ends with pairs of open sided pocket frames disposed in opposed relation, said frames being open to each other at their inner ends, tubular pockets arranged in said pocket frames, pairs of pocket clamping members arranged at the inner ends of said frames, and clamping wedges disposed between said pairs of clamping members to coact therewith.

7. A work holder for grinding machines comprising a pair of pocket frames of rectangular form disposed in outwardly diverging relation, said frames being open to each other at their inner ends, tubular pockets arranged in said. pocket frames, pocket clamping members arranged at the inner ends of said frames in out 'ardly converging relation, and clamping wedges disposed between said pairs of clamping members to coact therewith.

8. A work holder for grinding machines comprising a pair of pocket frames disposed in opposed relation, said frames being open to each other at their inner ends, tubular pockets arranged in said pocket frames, pocket clamping members arranged at the inner ends of said frames, and clamping wedges disposed between said pairs of clamping members to coact therewith.

In witness whereof, I have hereunto my hand.

set

EMIL A. SAMUEL. [1,. s]