US1027364A - Barber's chair. - Google Patents

Description

` J. H; WBRTZ &f P. ROMERNAGKL y BARBERS CHAIR.

APPLICATION FILED LPRA, 1911.

Patented May 21, 1912.

2 SHEIITS-SHEET 1.

fr) Ven'cr's:

` J. H. WERTZ & F. POMERNACKI.

BARBERS CHAIR. APPLICATION FILED APRA, 1911.

.2 SHEETS-SHEET 2.

1,027,364. i Patented May 21, 1912.

UNITED STATES PATENT OFFICE.

JOSEPH H. wnn'rz AND' FRANK POME'RNACKI, or' CHICAGO, ILLINOIS, AssIGNons 'ro' Y* p THEO, A. KOCHS CO., 'OF GHICnCO, ILLINOIS, 'A CORPORATION OF ILLINOIS.

BARBERS CHnIm Specification of Letters Patent.

41p1-ligation mea .april 4, 1911. serial No. 618,832. l

To all whom it may concern:

Beit known that we, `JOSEPH H. WERTZ,

a citizen of the UnitedStates, and FRANK POMERNACKI, a subject of thev Emperor of Russia, both residin at Chicago, in the county of Cook and tate of Illinois, have invented certain new and useful 4Improvements in Barbers Chairs, of which the following is aspecication.

The present invention relates more particularly to the lookin member used for locking the chair agalnst rotative movement.

The primary object of the invention. is to provlde a locking member which can be made operative at an time desired during the raising and lowering of the chair body.

Another object o f the invention is to provide a locking member which will be operated with a canting movement, thus 'throwlng a portion ofit into a bitingv engagement with a fixed surface lto effect the locking operation. y

A further object of the invention is to provide a locking member which will normally be held by gravit out of locking position. And a still furt er objectof the invent-ionl is to perform this canting operation by a greater than normal movement of a portion of the pump mechanism.

This invent-ion further relates tothe features of construction and to the combination of parts hereinafter described and claimed. In the drawings, Figure 1 is a sectional view of the base of a barbers chair, showing thepump mechanism and the locking mechaber and piston, and showing the members on the pitman which engage the locking member to effect the locking operation; Fig. 5, a perspective of the locking memberof the present invent-ion; and Fig. 6, a section on line 6-6 of Fig. 4, looking in the direc' tin of the arrow. f

The lock of the present invention is ap-` pliedto' that type of chair commonly termedV shown in the drawings form no portion of the present invention and are merely shown for illustrative purposes, so it is ot deemed necessary to describe these parts etail.

The base portion 7 lis attached to a cylinder 8 by any suitable fastening means, and the cylinderS incloses a piston 9, which terminates in .an enlarged hollow head 1.0, to which is secured the v seat of the chair. The piston 9 has therein a plunger 11, tovwhich is connected a pit-man 12 fastened toa crank arm 13 mounted upon a shaft 14. The plunger is providedrwith a check valve 15, and the piston is provided .with a check valve 16. The construction and method of operation of `these parts are noty deemed to have any bearing on the `present invention any more than the manner in which they may be formed to receive and actuate the locking means set forth in the annexed claims; and, moreover, `these parts' are generally described in the Letters Patent to Pfanschmidt and Schwarzkopf heretofore mentioned.

The locking mechanism which constitutes the present invention consists of a body portion 17, from which extend companion arms 18 spaced away from lone another. The slot 19 intermediate the arms 18 is of a size to permit the entrance therebetween of the stem 20 of the pitman 12. This construct-ion may be described as a locking member with a bifurcated end which provides arms adapted to lie upon opposite sides of the stem of the pitman. It will be noted that the arms 18 are, as shown, curvilinear in format-ion, and that they overlie yoppositely extending pins or contacts 21 lugs 22, which, as shown, are provided with a curved surface 23. These lugs are seated within recesses 24 formed in the side wall of the piston, and the recesses are of a curved PafentedMayaI, 1912.v

. formation, corresponding to the curvature provided within the walls of the piston.

The recesses 24 communicate with an opening 25 in the side wall of the piston, and through this opening projects the body portion of the locking member.-

By referring to Fig. 6, it will be seen that the outer face of the body portion of the locking member is formed wit-h a curvaturev The operation of the device is as follows :k

When it is desired to raise or lower the chair, the shaft 14 is actuated by a suitable handle (not shown), and the` crank arm 13 is swung to operate the pitman 12, to raise or lower theplunger 11, whereby, through theoperation of the check valves, fluid is either forced under or exhausted from beneath the piston and the piston raised or lowered, resulting in the raising or lowering of the chair seat. This pumping operation isold and well known in the art and is fully and clearly described in the Pfanschmidt and Schwarzkopf patentl heretofore re Vferred to.

The operation of the locking mechanism, which :forms the feature of the 'present invention, is as follows When the stem 20 ofD the pitman is raised a greater degree than is necessary to perform the pumping operation, the pins 21 on the pitman stem engage with the curvilinear arms 18 and tilt or cant the body port-ion of the locking member around the center of the recesses 24, the lugs 22 turning in' said recesses, as will 'be obvious. This throws the upper outer end 26 of the body portion of the lockin member into a biting engagement with the wall of the cylinder, which is a fixed y surface with respect to the raising and lowering of the chair body; and thus, by forming a biting engagement with the said fixed surface, the lockingmember prevents rotary movement of the piston within the cylinder, and hence prevents rotary movement of the chair body.

It will, of course, be understood that. the biting engagement referred to is not of a suiciently strong nature to embed the ed e of the locking member into the wall of t e cylinder, so that said wall would become flaked or mutilated; but is rather intended to convey the idea of a surface impinging against the side of the cylinder by reason o f a canting movement imparted to the locking member.

It will be noted that in the present construction the locking memberis actuated solely by the stem of the pitman, and that the shape or nature of the plunger does not enter into the construction atall; and, 'in fact, were itpossible to make the pump without a plunger, the locking mechanism would be operated equally as Jwell without the use of a plunger, all that is necessary 'to operate the lock being a pitman, a piston, and a cylinder.

By providing the locking member with the arms 18, a weight is afforded, which tends normally to hold the upper edge 26 of the locking member out of engagement ing mechanism, the only means by which the locking can be effected being the throwing of the lever in a position greater than required to perform the pumping operation. In the barber chair art, it has been customary to perform the locking operation when the lever is in a substantially vertical position.

From a study of the drawings, it will be seen that at all times, save when the contact on the pitman stem is engaging the arms 1S, the locking member will be free to rock within its bearings. The engagement of the outer face of the locking member, therefore,

with the sides of the casing during the up and down movementsof the chair will tend to force the upper edge 26 of the locking member away from the side of the piston and maintain it out of locking engagement. This forcing away will, of course, be assisted by the ,weight of the arms 18. But even if the element of gravity did not enter into the operation, the movement of the piston alone would tend to keep the locking member out of locking position, save when it was canted by the movement of the piti" man, so as to effect the impinging of the edge 26 against the side of the cylinder. It will, of course, be seen that since the locking member is carried by the piston, the locking operation can be performed at any suitable time during the raising or lowering of the chair.

`We claim:

1. In a barbers chair, the combination of pump mechanism, a fluid pressure motor actuated by the pump mechanism for raising and lowerin the chair, said pump mechanism inclu ing a. pitrnan, a locking member for locking the chair against revolution, said locking member being carried by a portion of said motor mechanism and actuated by direct engagement with the pitinan whenl said pitman is raised a predetering andA lowering the chair, said pump.

mechanism including a pitman, a rocking locking member, for locking the chair aga-inst revolution, said locking member being mounted in a portion of the motor mechanism and actuated by direct engagement with the pitman when said pitman is raised a predetermined degree, substantially as described. y

3. In-a barbers chair, the combination of pump mechanism, a fluid pressure motor actuated by the pumpfmechanism for raising and lowering the chair, said pump mechanism including 'a pitman, -a pivotally.

mounted locking member carried by a portion of the motor mechanism, a predetermined degree of movement ot'- said pitman rocking said locking member about its pivotal center and 'throwing it into a biting engagement with a fixed surface whereby the chair is locked againstl rotative movement, substantially as described.

4. In a barbers chair. the combination of a cylinder, a piston within the cylinder, a locking member mounted within the wall ot said piston to have av rocking movement, said wall having an opening through which said locking member projects, and means for canting the locking member to throw it into a biting engagement with the walls et the cylinder, substantially as described.

5. In a barbers chair, the combination of a cylinder, a piston within the c x-'lindena locking member mounted within the wall ot said piston to have a rocking movement, said wall having an opening through which said piston projects, and means for canting the locking member to throw it into a biting engagement with the walls of the cylinder, said locking member being held out of canted position by gravity, substantially as described. G. In a barbers chair, the combination of'.

a cylinder, a piston within the cylinder, a pump piston, a pitman directly connected thereto, a locking member mounted in said first mentioned piston, a Contact on the pitman adapted to engage the locking member, whereby upon a predetermined movement cf' the pitman the locking member is canted and thrown into a biting engagement with the walls of the cylinder,'substantially as described. n

7. In a barbel-s chair, the combination of a cylinder, Aa piston within the cylinder, a pump piston, a pitman connected thereto, a locking member mounted in said first menmined degree whereby said locking member tioned piston to have a rocking movement,`

a contact on the pit-man adapted `to engage and rock theflocking. member, whereby the locking memberis canted and thrown. into a-biting engagement with the walls of the cylinder, substantially as described.

8.A In abarbers chair, the combination et a cylinder, a piston within the cylinder,` a pump piston, a pitman directly connected thereto, a locking member mounted in said first mentioned piston, an arm extending from the locking member, a contact on' the pitman adapted to engage said arm when said pitman is moved a predetermined de.

gree, whereby said locking member is canted and thrown into a biting engagement with the walls of said cylinder, substantially as described.

9. Ina barbers chair, thecombination of a cylinder, a fluid pressure lnotor within the cylinder, including a piston. and pit-man, a locking member mounted in said piston and terminating in a bifurcated end adapted to embrace said pitman, and contacts on said pitman adapted to engage said biturcated end when the pitman is moved a predetermined distance, whereby the locking member is ycanted and thrown'into a biting engagement with said cylinder, substantially as described.

10; In a barbers chair, the combination of a cylinder. a fluid pressure-motor 7ithin the cylinder, including a pistony and pitman, a locking member mounted in said piston to embrace said pitman, and kcontacts on vsaid )itman ada )ted to en ave said bifurcated end when the pitman is moved a predetermined distance, whereby the locking memberis canted and thrown into a biting engagement with said cylinder, said locking member being held normally out of canted position by the weight of said end, substantially as described.

11. In a barbers chair, the combination oi a cylinder, a piston within the cylinder, a pump piston, a pitman connected thereto, afloekingmember carried by the rst mentioned piston, oppositely extending curved.

lugs on the locking member, said piston having'curved recesses adapted to receive said lugs, means for effecting an engagement between said pitlnan and locking member, a predetermined degree of movement of Ysaid pitman rocking said locking member about said lugs as a pivotal center, whereby it is canted and thrown into a biting engagement .with the wall of said cylinder, substantially as described,

12. In a barbers chair, the combination otra cylinder, a piston within said cylinder, a pump pistoma pitman connectedto said piston', a locking member, `oppositely eX- tending curved lugs on the locking member,

BEST AVMLBLE COPY said piston having curved recesses adapted being normally held out of canted position, to receive said lugs, means for eecting an substantially as described.

engagement between said pit-man and lock- JOSEPH H WERTZ ing member a predetermined degree of y 5 movement ofsaid pi-tman rocking said lock- FRANK POMERNACKI' ing member, whereby it is canted and Witnesses: thrown into a biting engagement with the ARTHUR SPIELMANN, Wall of said'cylinder, said locking member CHARLES PFANscHMIDr.

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